Patent Application
20200079676
The invention relates to shaping a glass sheet, especially using opposing bending tools. The invention also relates to a method of shaping a glass sheet and a bending tool utilized therein that improves shaping.
Various processes are known for shaping or bending a sheet of glass. Typically, a glass sheet is heated to a temperature where the glass sheet is deformable and then the bending process is carried out. In certain bending processes, the heated glass sheet is supported on a ring member and allowed to sag under the influence of gravity, with or without the assistance of an additional pressing force. Another known glass sheet bending process is a press bending process whereby a glass sheet (or a nested pair) is bent between a pair of complementary shaping members, usually in a spaced vertical relationship. Following bending, the glass sheet should possess a desired shape, be dimensionally stable, and not be optically distorted. Otherwise, the bending process results in waste or products that possess poor quality.
One factor that may result in waste or products that possess poor quality is the position of the heated glass sheet in relation to one or more of the bending tools. Prior to being bent, the glass sheet may be heated to the bending temperature in an associated furnace and moved using a series of rollers. Unfortunately, the known processes only facilitate positioning the glass sheet on the rollers and prior to entry of the glass sheet into the furnace. Consequently, alignment of the glass sheet before bending may not be ideal.
Thus, it would be advantageous to develop a method of shaping a glass sheet and a bending tool that overcomes the aforementioned problems.
Accordingly the present invention provides from a first aspect a method of shaping a glass sheet, comprising: providing a glass sheet; heating the glass sheet to a temperature suitable for shaping; depositing the glass sheet on a first bending tool, the glass sheet being disposed over a first segment of the first bending tool, the first segment at least partially defining a shaping surface of the first bending tool; moving the first segment of the first bending tool from a first position to a second position to cause contact with a first portion of the glass sheet, the contact with the first portion of the glass sheet adjusting a position of the glass sheet relative to the shaping surface of the first bending tool; and shaping the glass sheet on the first bending tool.
Preferably the glass sheet is shaped on the first bending tool by press bending the glass sheet between the first bending tool and a second bending tool.
Preferably the method further comprises supporting the glass sheet on the shaping surface of the first bending tool.
Preferably the method further comprises moving the first segment from the second position to the first position prior to the glass sheet being disposed over the first segment of the first bending tool.
Preferably the method further comprises moving a second segment of the first bending tool from a first position to a second position to cause contact with a second portion of the glass sheet, the contact with the second portion of the glass sheet adjusting the position of the glass sheet relative to the shaping surface of the first bending tool, wherein movement of the second segment of the first bending tool from the first position to the second position is in a direction which is toward the first segment of the first bending tool.
Preferably the method further comprises moving another segment of the first bending tool from a first position to a second position, wherein movement of the another segment of the first bending tool is in a direction which is perpendicular to a direction of movement of the first segment.
Preferably the method further comprises moving another segment of the first bending tool to cause contact with another portion of the glass sheet, the contact with another portion of the glass sheet adjusting the position of the glass sheet relative to the shaping surface of the first bending tool, wherein movement of the first segment of the first bending tool is in a direction which is perpendicular to a direction of glass travel and movement of the another segment of the first bending tool is in a direction of glass travel.
Preferably the method further comprises moving another segment of the first bending tool, wherein movement of the another segment of the first bending tool is in a direction which is opposite a direction of glass travel.
Preferably the method further comprises adjusting the position of the glass sheet relative to the shaping surface of the first bending tool prior to depositing the glass sheet on the first bending tool.
Preferably movement of the first segment of the first bending tool from the first position to the second position is in a direction which is perpendicular to a direction of glass travel.
Preferably the first portion of the glass sheet is a first pillar edge portion of the glass sheet and after moving the first segment of the first bending tool from the first position to the second position the first pillar edge of the glass sheet abuts an end surface of a first positioning assembly.
Preferably the first portion of the glass sheet is contacted by a first positioning assembly and a second positioning assembly, the first positioning assembly and the second positioning assembly being spaced apart from each other, wherein the first positioning assembly and the second positioning assembly each move with the first segment and in a direction which is toward the glass sheet prior to contacting the glass sheet.
Preferably the first portion of the glass sheet is an edge portion of the glass sheet.
In some embodiments movement of the first segment of the first bending tool from the first position to the second position is in a direction which is toward a second segment of the first bending tool.
In these embodiments preferably the method further comprises moving the second segment of the first bending tool from a first position to a second position to cause contact with a second portion of the glass sheet, the contact with the second portion of the glass sheet adjusting the position of the glass sheet relative to the shaping surface of the first bending tool, wherein movement of the first segment of the first bending tool and movement of the second segment of the first bending tool is in a direction which is perpendicular to a direction of glass travel.
Preferably the method further comprises moving a third segment of the first bending tool from a first position to a second position to cause contact with a third portion of the glass sheet, the contact with the third portion of the glass sheet adjusting the position of the glass sheet relative to the shaping surface of the first bending tool, wherein movement of the third segment of the first bending tool is in a direction which is perpendicular to a direction of movement of the first segment and is toward a fourth segment of the first bending tool.
Preferably the method further comprises disposing the glass sheet over a fourth segment of the first bending tool and causing contact with a fourth portion of the glass sheet to adjust the position of the glass sheet relative to the shaping surface of the first bending tool.
Preferably the first segment, second segment, third segment, and fourth segment are configured as a ring which supports the glass sheet in a peripheral region thereof.
Preferably the glass sheet is also disposed over the second segment of the first bending tool and the third segment of the first bending tool and the first segment of the first bending tool, second segment of the first bending tool, third segment of the first bending tool, and fourth segment of the first bending tool each define a discrete portion of the shaping surface.
Preferably the fourth segment of the first bending tool does not move toward the third segment of the first bending tool.
Preferably the fourth portion of the glass sheet is a leading edge portion of the glass sheet and the leading edge portion of the glass sheet is contacted by a stopper to regulate the position of the glass sheet relative to the shaping surface of the first bending tool and after contact with the leading edge portion of the glass sheet the stopper moves away from the leading edge portion of the glass sheet.
Preferably the stopper moves away from the leading edge portion of the glass sheet vertically in a downward direction or in a direction of glass travel.
In some embodiments the first bending tool comprises a first segment, a second segment, a third segment, and a fourth segment.
Preferably the first segment, second segment, third segment, and fourth segment are configured as a ring which supports the glass sheet in a peripheral region thereof.
Preferably the glass sheet is also disposed over the second segment of the first bending tool and the third segment of the first bending tool and the first segment of the first bending tool, second segment of the first bending tool, third segment of the first bending tool, and fourth segment of the first bending tool each define a discrete portion of the shaping surface.
Preferably the fourth segment of the first bending tool does not move toward the third segment of the first bending tool.
Preferably the fourth portion of the glass sheet is a leading edge portion of the glass sheet and the leading edge portion of the glass sheet is contacted by a stopper to regulate the position of the glass sheet relative to the shaping surface of the first bending tool and after contact with the leading edge portion of the glass sheet the stopper moves away from the leading edge portion of the glass sheet. Preferably the stopper moves away from the leading edge portion of the glass sheet vertically in a downward direction or in a direction of glass travel.
In some embodiments the first portion of the glass sheet is contacted by a first positioning assembly, the first positioning assembly moving with the first segment and in a direction which is toward the glass sheet prior to contacting the first portion of the glass sheet.
Preferably the first positioning assembly comprises a body portion which is configured to move vertically in an upward direction or a downward direction.
Preferably the body portion moves vertically in the downward direction prior to press bending the glass sheet between the first bending tool and a second bending tool.
Preferably the body portion moves vertically in the upward direction after press bending the glass sheet between the first bending tool and a second bending tool.
Preferably the method further comprises contacting an upper surface of the body portion with the second bending tool to move the body portion in the downward direction.
From a second aspect the present invention provides a bending tool for shaping a glass sheet, comprising: a shaping surface for supporting a glass sheet thereon, the shaping surface being at least partially defined by a first segment and a second segment, wherein the first segment is spaced apart from the second segment and the first segment is movable from a first position to a second position in a direction which is toward the second segment; and a first positioning assembly in mechanical communication with the first segment, wherein the first positioning assembly is configured to contact a first portion of the glass sheet to adjust a position of the glass sheet relative to the shaping surface.
Preferably when the first segment is in the first position the glass sheet is deposited on the bending tool and when the first segment is in the second position when the glass sheet is shaped on the first bending tool.
Preferably the shaping surface is configured to support the glass sheet in a peripheral region thereof.
Preferably when the first segment moves from the first position to the second position, the movement of the first segment in the direction toward the second segment is perpendicular to a direction of glass travel or the same as the direction of glass travel.
Preferably the second segment is movable from a first position to a second position and in a direction which is toward the first segment.
Preferably the second segment is movable from a first position to a second position and in a direction which is perpendicular to movement of the first segment in the direction toward the second segment.
Preferably the first portion of the glass sheet is a pillar edge portion, leading edge portion, or trailing edge portion of the glass sheet.
Preferably the bending tool further comprises a third segment which at least partially defines the shaping surface, preferably wherein the third segment is movable in a direction which is the same as a direction of glass travel.
Preferably the bending tool further comprises a third segment which at least partially defines the shaping surface, preferably wherein the third segment is movable in a direction which is perpendicular to the movement of the first segment in the direction toward the second segment.
Preferably a groove is provided in the first segment for receiving a portion of a body portion of the first positioning assembly.
Preferably the first positioning assembly is attached to the first segment and moves with the first segment toward the second segment.
Preferably the bending tool further comprises a second positioning assembly in mechanical communication with the first segment, the second positioning assembly being spaced apart from the first positioning assembly and configured to contact the first portion of the glass sheet to adjust the position of the glass sheet relative to the shaping surface.
Preferably the bending tool further comprises one or more positioning assemblies in mechanical communication with the second segment, the one or more positioning assemblies configured to contact a second portion of the glass sheet to adjust the position of the glass sheet relative to the shaping surface.
Preferably the bending tool further comprises a frame, wherein the glass sheet is in a first position relative to the frame when the first segment is in a first position relative to the frame, and the glass sheet is in a second position relative to the frame and the first portion of the glass sheet is in contact with the first positioning assembly when the first segment is in a second position relative to the frame.
In some embodiments the second segment is movable from a first position to a second position and in a direction which is toward the first segment and when the second segment moves from the first position to the second position, the movement of the second segment toward the first segment is perpendicular to a direction of glass travel.
In some embodiments the bending tool further comprises a third segment which at least partially defines the shaping surface, wherein the third segment is movable in a direction toward a fourth segment.
Preferably third segment is configured to receive a trailing edge portion of the glass sheet.
Preferably a first end of the third segment is spaced apart from a first end of the first segment and a second end of the third segment is spaced apart from a first end of the second segment.
Preferably the fourth segment is configured to receive a leading edge portion of the glass sheet and is not movable in a direction which is toward the third segment.
In some embodiments the first positioning assembly comprises a body portion, the body portion being movable from a first position to a second position and from the second position to the first portion.
Preferably the body portion is in the first position prior to shaping the glass sheet and in the second position when the glass sheet is shaped.
Preferably a portion of the body portion is received by a groove provided in the first segment when in the second position.
Preferably when the body portion is in the first position an upper surface of the body portion is oriented in an oblique manner with respect to the shaping surface.
Preferably a biasing member applies a force to the body portion to move the body portion from the second position to the first position.
In some embodiments the first positioning assembly comprises a body portion, the body portion being disposed over the first segment and configured to move vertically in an upward direction or a downward direction.
Preferably the body portion extends toward an inner edge of the first segment.
Preferably the body portion comprises an end surface which is configured to contact the first portion of the glass sheet.
From a third aspect the present invention also provides a glass shaping line comprising a bending tool according to the second aspect of the present invention.
Preferably the glass shaping line further comprises a second bending tool.
Preferably the glass shaping line is for shaping a glass sheet by sagging under the influence of gravity while the glass sheet is being supported on the bending tool.
Preferably the glass shaping line further comprises a furnace for heating the glass sheet to a temperature suitable for shaping.
Preferably the bending tool is provided as a portion of a bending station and the bending station also comprises a plurality of rollers for conveying the glass sheet to a location above the bending tool and a fluid pad assembly for supporting at least a portion of the glass sheet above the bending tool.
Preferably the glass shaping line further comprises a lehr for cooling the glass sheet after shaping.
Preferably the glass shaping line further comprises a second bending tool and the second bending tool is a full-faced mold.
Preferably the glass shaping line further comprises a furnace for heating the glass sheet to a temperature suitable for shaping 61 and the glass shaping line further comprises rollers for conveying the glass sheet through the furnace.
The present invention also provides from another aspect a method of shaping a glass sheet, comprising: providing a glass sheet; heating the glass sheet to a temperature suitable for shaping; providing a first bending tool, the first bending tool comprising a frame and a first segment movable relative to the frame, the first segment comprising a positioning assembly in mechanical communication therewith; depositing the glass sheet on the first bending tool, the glass sheet being disposed over the first segment of the first bending tool and the glass sheet being in a first position relative to the frame; moving the first segment of the first bending tool from a first position relative to the frame to a second position relative to the frame to cause the positioning assembly to contact a first edge portion of the glass sheet thereby moving the glass sheet to a second position relative to the frame of the first bending tool; and shaping the glass sheet on the first bending tool.
Embodiments of a method of shaping a glass sheet are provided. In an embodiment, the method comprises providing a glass sheet. The glass sheet is heated to a temperature suitable for shaping. The glass sheet is deposited on a first bending tool. The glass sheet is disposed over a first segment of the first bending tool. The first segment of the first bending tool at least partially defines a shaping surface of the first bending tool. The first segment of the first bending tool is moved from a first position to a second position to cause contact with a first portion of the glass sheet. The contact with the first portion of the glass sheet adjusts a position of the glass sheet relative to the shaping surface of the first bending tool. The glass sheet is shaped on the first bending tool.
Also, embodiments of a bending tool for shaping a glass sheet are provided. In an embodiment, the bending tool comprises a shaping surface for supporting a glass sheet thereon. The shaping surface is at least partially defined by a first segment and a second segment. The first segment is spaced apart from the second segment and the first segment is movable from a first position to a second position in a direction which is toward the second segment. A first positioning assembly is in mechanical communication with the first segment. The first positioning assembly is configured to contact a first portion of the glass sheet to adjust a position of the glass sheet relative to the shaping surface.
The above, as well as other advantages of the present invention will become readily apparent to those skilled in the art from the following detailed description when considered in the light of the accompanying drawings in which:
It is to be understood that the invention may assume various alternative orientations and step sequences, except where expressly specified to the contrary. It is also to be understood that the specific methods, devices, apparatuses, and features illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts. Hence, specific dimensions, directions, or other physical characteristics relating to the embodiments disclosed are not to be considered as limiting, unless expressly stated otherwise. Also, although they may not be, like elements found in the aforementioned embodiments may be referred to with like identifiers within this section of the application.
Embodiments of a method of shaping a glass sheet, a glass shaping line, and a bending tool utilized therein are described herein and with reference to
The glass sheet may be utilized as a portion of a window such as, for example, a windscreen for an automobile. However, the glass sheet may have other automotive applications. For example, the glass sheet may be utilized to form a side window, sunroof, or a rear window. Such a window may be monolithic or laminated. Additionally, the glass sheet may have other vehicle applications. For example, the glass sheet may have applications to on-highway and off-highway vehicles. Also, the glass sheet may have architectural, electronic, industrial, locomotive, naval, aerospace, and other applications.
In certain embodiments, the glass sheet may have a soda-lime-silicate composition. A typical soda-lime-silicate glass composition is (by weight), SiO2 69-74%; Al2O3 0-3%; Na2O 10-16%; K2O 0-5%; MgO 0-6%; CaO 5-14%; SO3 0-2% and Fe2O3 0.005-2%. The glass composition may also contain other additives, for example, refining aids, which would normally be present in an amount of up to 2%. In other embodiments, the glass sheet may be of another composition. For example, the glass sheet may be of a borosilicate composition or an aluminosilicate composition. The glass sheet may have a thickness between 0.5-25 millimetres (mm), typically a thickness between 0.5-8 mm.
The shape of the glass sheet may vary between embodiments. However, in certain embodiments, the glass sheet may have a rectangular outline in plan view. Preferably, the glass sheet has a first major surface and a second major surface. The second major surface opposes the first major surface. Also, the glass sheet may comprise a leading edge portion and a trailing edge portion. As used herein, an edge portion of the glass sheet may refer to a minor surface of the glass sheet that connects the first major surface to the second major surface. The glass sheet may comprise one or more edge portions. Each edge portion of the glass sheet can be flat or curved. Thus, the leading edge portion may refer to the minor surface of the glass sheet that connects the first major surface to the second major surface and is conveyed in a direction of glass travel in advance of the trailing edge portion. In an embodiment, the trailing edge portion is the longest minor surface of the glass sheet that connects the first major surface to the second major surface. In this embodiment, the leading edge portion is of a length which is less than the length of the trailing edge portion. In other embodiments (not depicted), the leading edge portion is the longest minor surface of the glass sheet that connects the first major surface to the second major surface and the trailing edge portion is of a length which is less than the length of the leading edge portion. Additionally, the glass sheet may comprise a first pillar edge portion and a second pillar edge portion. The first pillar edge portion and second pillar edge portion are disposed on opposite sides of the glass sheet. In an embodiment, the first pillar edge portion is a minor surface of the glass sheet that connects the first major surface to the second major surface. In another embodiment, the second pillar edge portion is a minor surface of the glass sheet that connects the first major surface to the second major surface.
The glass sheet 106 is transported through the furnace 104 on rollers 108. The rollers 108 are spaced apart. The spacing of the rollers 108 is reduced near the exit of the preheating furnace 104, since the glass sheet 106 in a heated state is deformable and therefore requires greater support.
The preheating furnace 104 is followed by a bending station 110. The bending station 110 may include a centering device 102. The centering device 102 may be used to regulate positioning of the glass sheet 106 before it is deposited on the first bending tool 112. As shown in
As illustrated best in
Referring back to
Once the glass sheet 106 exits the preheating furnace 104, the glass sheet 106 is transferred from the rollers 108 in the preheating furnace 104 to the plurality of rollers 138. As illustrated in
In certain embodiments, the glass shaping line 100 comprises a fluid pad assembly 140. The fluid pad assembly 140 facilitates positioning the glass sheet 106 on the first bending tool 112 and transferring the glass sheet 106 from the plurality of rollers 138 to the first bending tool 112. The fluid pad assembly 140 comprises one or more fluid pads 142. It is preferred that a plurality of fluid pads 142 are provided. When a plurality of fluid pads 142 are provided, the fluid pads 142 may be configured as an array. The centering device 102, plurality of rollers 138, fluid pad assembly 140, and the fluid pads 142 may operate and be as described in PCT patent application no. PCT/GB2017/053414.
Preferably, when the fluid pad assembly 140 is provided, the fluid pad assembly 140 is activated before the leading edge portion of the glass sheet 106 reaches the one or more portions 130, 130A of the first positioner 126 that act as the stopper. In certain embodiments, the one or more portions 130, 130A of the first positioner 126 may be utilized to regulate the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. The one or more portions 130, 130A of the first positioner 126 may be vertically movable in the upward direction or downward direction. After contacting and positioning the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112, the one or more portions 130, 130A of the first positioner 126 move away from the leading edge portion of the glass sheet 106 to avoid interference with one or more of the bending tools 112, 114 when the glass sheet is being shaped. In an embodiment, the one or more portions 130, 130A of the first positioner 126 move away from the leading edge portion of the glass sheet 106 vertically in a downward direction. In another embodiment, the one or more portions 130, 130A of the first positioner 126 move away from the glass sheet 106 in a direction of glass travel.
Referring back to
The second bending tool 114 may be a male tool. In an embodiment, the second bending tool 114 is a full-face mold. In these embodiments, the second bending tool 114 may comprise a convex shaping surface 144. Suitable embodiments of the second bending tool 114 are also described in International Publication No. WO2016/189319 A1, the entire disclosure of which is hereby incorporated by reference.
As mentioned above, the glass sheet 106 has a first major surface 146 and a second major surface 148. As illustrated in
The first bending tool 112 may be a female tool. In an embodiment, the first bending tool 112 is a ring-type mold. As illustrated best in
The shaping surface 116 is at least partially defined by a first segment 118. In some embodiments, the shaping surface 116 is at least partially defined by a second segment 120. The first segment 118 is spaced apart from the second segment 120. In the embodiments described and illustrated, the first segment 118 will be described and depicted with reference to a segment of the first bending tool 112 which is configured to receive the first pillar edge portion of the glass sheet 106. However, it should be appreciated that the first segment 118 could refer to a segment of the first bending tool 112 configured to receive the trailing edge portion of the glass sheet 106 or the leading edge portion of the glass sheet 106. Once an edge portion of the glass sheet 106 is received, the first segment 118 is configured to support the edge portion of the glass sheet 106. Additionally, in certain embodiments, the second segment 120 will be described and depicted with reference to a segment of the first bending tool 112 which is configured to receive the second pillar edge portion of the glass sheet 106. However, it should be appreciated that the second segment 120 could refer to a segment of the first bending tool 112 configured to receive the trailing edge portion of the glass sheet 106 or the leading edge portion of the glass sheet 106. Once an edge portion of the glass sheet 106 is received, the second segment 120 is configured to support the edge portion of the glass sheet 106.
Positioned at one end of the first segment 118 and the second segment 120 is a third segment 122. More particularly, a first end of the third segment 122 is spaced apart from a first end of the first segment 118 and a second end of the third segment 122 is spaced apart from a first end of the second segment 120. When provided, the third segment 122 at least partially defines the shaping surface 116 of the first bending tool 112. In certain embodiments, the third segment 122 is configured to receive the trailing edge portion of the glass sheet 106. In these embodiments, once the trailing edge portion of the glass sheet 106 is received, the third segment 122 is configured to support the trailing edge portion of the glass sheet 106.
Positioned at another end of the first segment 118 and the second segment 120 is a fourth segment 124. More particularly, a first end of the fourth segment 124 is spaced apart from a second end of the first segment 118 and a second end of the fourth segment 124 is spaced apart from a second end of the second segment 120. When provided, the fourth segment 124 at least partially defines the shaping surface 116 of the first bending tool 112. In certain embodiments, the fourth segment is configured to receive the leading edge portion of the glass sheet 106. In these embodiments, once the leading edge portion of the glass sheet 106 is received, the fourth segment 124 is configured to support the leading edge portion of the glass sheet 106.
Preferably, when provided, the first segment, second segment, third segment, and fourth segment each define a discrete portion of the shaping surface 116 of the first bending tool 112. When the glass sheet 106 is supported on the shaping surface 116 of the first bending tool 112, the glass sheet 106 is disposed over the first segment 118, second segment 120, third segment 122, and fourth segment 124. The segments 118-124 may define the generally rectangular outline. In certain embodiments, the first segment 118, second segment 120, third segment 122, and fourth segment 124 are configured as a ring which supports the glass sheet 106 in a peripheral region thereof. However, the first bending tool 112 may have other configurations. For example, in an embodiment, the first segment 118 may not be provided in a parallel relationship with the second segment 120. In other embodiments, the third segment 122 may not be provided in a parallel relationship with the fourth segment 124. In still other embodiments, the outline of the first bending tool 112 may be trapezoidal or have other forms suitably configured to support the particular glass sheet to be shaped. Also, as is illustrated in
One or more of the segments 118-124 are movable. As one or more of the segments 118-124 are movable and the segments 118-124 provided define the shaping surface 116 of the first bending tool 112, in certain embodiments, the shaping surface 116 of the first bending tool 112 also moves in whole or in part. Movement of one or more of the segments 118-124 enables the position of the glass sheet 106 to be adjusted relative to the shaping surface 116 of the first bending tool 112 after the glass sheet 106 has been deposited on the first bending tool 112 and before the glass sheet 106 is shaped. Preferably, two or more of the segments 118-124 are movable. More preferably, three of the segments 118-124 are movable. In this embodiment, the first segment 118, second segment 120, and third segment 122 may be movable and the fourth segment 124 may have a fixed position. However, in other embodiments (not depicted), each of the segments 118-124 is movable.
In an embodiment, the first segment 118 is movable. In this embodiment, it is preferred that the first segment 118 is movable and moves in a direction which is toward the second segment 120. It is also preferred that the first segment 118 is movable and moves in a direction which is away from the second segment 120. In certain embodiments, the direction in which the first segment 118 moves toward the second segment 120 is perpendicular to the direction of glass travel or the same direction as the direction of glass travel. Preferably, the first segment 118 moves from a first position to a second position and from the second position to the first position. It is preferred that when the first segment 118 moves from the first position to the second position or from the second position to the first position that the direction in which the first segment 118 moves is perpendicular to the direction of glass travel. Preferably, the glass sheet 106 is deposited on the first bending tool 112 when the first segment 118 is in the first position. Preferably, when the first segment 118 moves toward the second segment 120, the first segment 118 moves from the first position to the second position. Also, it is preferred that when the first segment 118 moves in a direction which is away from the second segment 120, the first segment 118 moves from the second position to the first position. It is also preferred that the first segment 118 is in the second position when the glass sheet 106 is shaped on the first bending tool 112. In some embodiments, the first segment 118 moves from the first position to the second position or from the second position to the first position in one second or less. In other embodiments, the first segment 118 moves from the first position to the second position or from the second position to the first position in a half-second or less.
Preferably, the second segment 120 is movable. When the second segment 120 is movable, it is preferred that the second segment 120 is movable and moves in a direction which is toward the first segment 118. It is also preferred that the second segment 120 is movable and moves in a direction which is away from the first segment 118. In certain embodiments, the direction in which the second segment 120 moves toward the first segment 118 is perpendicular to the direction of glass travel or the same direction as the direction of glass travel. In other embodiments, the second segment 120 is not movable toward the first segment 118. Preferably, the second segment 120 is movable and moves from a first position to a second position and from the second position to the first position. Preferably, when the second segment 120 moves toward the first segment 118, the second segment 120 moves from the first position to the second position. Also, it is preferred that when the second segment 120 moves in a direction which is away from the first segment 118, the second segment 120 moves from the second position to the first position. Preferably, the glass sheet 106 is deposited on the first bending tool 112 when the second segment 120 is in the first position. It is also preferred that the second segment 120 is in the second position when the glass sheet 106 is shaped on the first bending tool 112. In some embodiments, the second segment 120 moves from the first position to the second position or from the second position to the first position in one second or less. In other embodiments, the second segment 120 moves from the first position to the second position or from the second position to the first position in a half-second or less.
The movement of the first segment 118 and the movement of the second segment 120 may occur in a simultaneous manner. For example, in embodiments where the first segment 118 moves toward the second segment 120 in a direction which is perpendicular to the direction of glass travel and the second segment 120 moves toward the first segment 118 in a direction which is perpendicular to the direction of glass travel, the movement of the first segment 118 and the movement of the second segment 120 may occur at the same time. In some embodiments where the first segment 118 and the second segment 120 move at the same time, the first segment 118 and the second segment 120 may both be moving toward the glass sheet 106 after it has been deposited on the first bending tool 112. In other embodiments, the first segment 118 and the second segment 120 may both be moving away from the glass sheet 106 and/or each other after the glass sheet 106 has been shaped.
In an embodiment, the third segment 122 is movable. In this embodiment, it is preferred that the third segment 122 is movable and moves in a direction which is toward the fourth segment 124. It is also preferred that the third segment 122 is movable and moves in a direction which is away from the fourth segment 124. In certain embodiments, the third segment 122 moves toward the fourth segment 124 in a direction which is perpendicular to the direction of glass travel. However, it is preferred that the third segment 122 moves toward the fourth segment 124 in a direction which is the same as the direction of glass travel. The third segment 122 may also move in relation to other segments. For example, in some embodiments, the third segment 122 moves in a direction which is perpendicular to the direction in which the first segment 118 moves. In these embodiments, the third segment 122 may also move in a direction which is perpendicular to the direction in which the second segment 120 moves. Preferably, the third segment 122 is movable and moves from a first position to a second position and from the second position to the first position. Preferably, when the third segment 122 moves toward the fourth segment 124, the third segment 122 moves from the first position to the second position. Also, it is preferred that when the third segment 122 moves in a direction which is away from the fourth segment 124, the third segment 122 moves from the second position to the first position. Preferably, the glass sheet 106 is deposited on the first bending tool 112 when the third segment 122 is in the first position. It is also preferred that the third segment 122 is in the second position when the glass sheet 106 is shaped on the first bending tool 112. In some embodiments, the third segment 122 moves from the first position to the second position or from the second position to the first position in one second or less. In other embodiments, the third segment 122 moves from the first position to the second position or from the second position to the first position in a half-second or less.
In certain embodiments (not depicted), the fourth segment 124 is movable. In one such embodiment, it is preferred that the fourth segment 124 is movable and moves in a direction which is toward the third segment 122. It is also preferred that the fourth segment 124 is movable and moves in a direction which is away from the third segment 122. Preferably, when the fourth segment 124 moves toward the third segment 122, the fourth segment 124 moves from a first position to a second position. Also, it is preferred that when the fourth segment 124 moves in a direction which is away from the third segment 122, the fourth segment 124 moves from the second position to the first position. When the fourth segment 124 moves toward the third segment 122, it is preferred that the fourth segment 124 moves in a direction which is opposite the direction of glass travel. In some embodiments, the fourth segment 124 moves from the first position to the second position or from the second position to the first position in one second or less. In other embodiments, the fourth segment 124 moves from the first position to the second position or from the second position to the first position in a half-second or less.
In embodiments where the fourth segment 124 moves toward the third segment 122, the movement of the third segment 122 and the movement of the fourth segment 124 may occur in a simultaneous manner. For example, in embodiments where the third segment 122 moves toward the fourth segment 124 in the direction of glass travel and the fourth segment 124 moves toward the third segment 122 in the opposite direction, the movement of the third segment 122 and the movement of the fourth segment 124 may occur at the same time. In some embodiments where the movement of the third segment 122 and the movement of the fourth segment 124 occur at the same time, the third segment 122 and the fourth segment 124 may both be moving toward the glass sheet 106 at the same time after the glass sheet 106 has been deposited on the first bending tool 112. In other embodiments, the third segment 122 and the fourth segment 124 may both be moving away from the glass sheet 106 and/or each other at the same time after the glass sheet 106 has been shaped. In still another embodiment, the movement of the third segment 122 and the movement of the fourth segment 124 may occur in a simultaneous manner with the movement of the first segment 118 and the movement of the second segment 120.
However, in other embodiments, it may be preferred that the fourth segment 124 does not move toward the third segment 122. In these embodiments, the position of the glass sheet 106 may change with respect to the fourth segment 124 prior to shaping. For example, when the fourth segment 124 is configured to receive the leading edge portion of the glass sheet 106 and the third segment 122 moves in a direction toward the fourth segment 124 prior to the glass sheet 106 being shaped, the leading edge portion of the glass sheet 106 may move on the fourth segment 124 in the direction of glass travel from a first position to a second position. In these embodiments, the position of the fourth segment 124 may be fixed.
Preferably, when two or more segments 118-124 move prior to shaping the glass sheet 106, the segments 118-124 move toward the glass sheet 106 in a predetermined order. For example, prior to shaping the glass sheet 106, the first segment 118 and the second segment 120 may move toward each other and the glass sheet 106. In this embodiment, the first segment 118 and the second segment 120 may move toward each other and the glass sheet 106 at the same time as described above. Following movement of the first segment 118 and the second segment 120, the third segment 122 may move toward the fourth segment 124 and the glass sheet 106. However, in other embodiments, the first segment 118, second segment 120, and third segment 122 may move in another predetermined order. For example, in certain embodiments, the first segment 118, second segment 120, and third segment 122 may each move toward the glass sheet 106 at the same time. Alternatively, in other embodiments, the third segment 122 may move toward the fourth segment 124 and the glass sheet 106 before the first segment 118 and second segment 120 move toward each other and the glass sheet 106. In this embodiment, the first segment 118 and the second segment 120 may move toward each other and the glass sheet 106 at the same time. It is preferred that, when two or more segments 118-124 move toward the glass sheet 106 in a predetermined order prior to shaping the glass sheet 106, each segment that moves will have moved from its first position to its second position in a predetermined period of time. It is preferred that the predetermined period of time begins when one or more of the two or more segments 118-124 begin to move and ends when all of the two or more segments 118-124 that move toward the glass sheet 106 in the predetermined order have moved from a first position to a second position. Preferably, the predetermined period of time is two seconds or less.
In some embodiments each segment 118-124 that is movable, moves from its second position to its first position after the glass sheet 106 has been removed from the first bending tool.
In some embodiments each segment 118-124 that is movable may move from its second position to its first position after the glass sheet 106 has been removed from the first bending tool in a simultaneous manner or in another predetermined order.
In some embodiments each segment 118-124 that is movable, moves from its second position to its first position after the glass sheet 106 has been shaped.
In some embodiments each segment 118-124 that is movable may move from its second position to its first position after the glass sheet 106 has been shaped in a simultaneous manner or in another predetermined order.
The vertical position of each segment 118-124 can be regulated utilizing one or more supports 150. The vertical position of a particular segment 118-124 may be regulated to compensate for changes in the segment or another segment caused by the heating and cooling of the first bending tool 112. The one or more supports 150 each have a length that can be modified. As each segment 118-124 has one or more supports 150 attached thereto, modifying the length of at least one of the one or more supports 150 regulates the position of the segment. The position of a segment is regulated in a vertical direction by increasing or decreasing the length of the one or more supports 150 that are attached to the segment.
The one or more supports 150 will now be described with reference to the third segment 122, which is illustrated in
Referring now to
In order to enable movement of a segment, the base member 152 is attached to a pair of hinges 168, 170 via the lower flange 166. The hinges 168, 170 illustrated in
The frame 176 is a stationary member. Thus, in embodiments where the first bending tool 112 comprises the frame 176, the segments 118-124 which are movable may move relative to the frame 176. For example, in an embodiment, the first segment 118 is movable relative to the frame 176. In this embodiment, the first segment 118 may be in a first position relative to the frame 176 and move from the first position to a second position relative to the frame 176. From the second position relative to the frame 176, the first segment 118 can move back to the first position relative to the frame 176 when desired. When the first bending tool 112 comprises other segments 120-124 that are moveable, the other segments 120-124 that are moveable may be in a first position relative to the frame 176 or a second position relative to the frame 176 and those segments 12-124 may move from the first position relative to the frame 176 to the second position relative or vice versa as described above for the first segment 118. Also, the glass sheet 106 is movable relative to the frame 176. For example, after the glass sheet 106 is deposited on the first bending tool 112 and prior to the glass sheet 106 being shaped, the glass sheet 106 may be in a first position relative to the frame 176 and move from the first position relative to the frame 176 to a second position relative to the frame 176. Preferably, the frame 176 is constructed of a rigid material. In an embodiment, the frame 176 is a platform.
The base member 152 is movable about an axis of rotation 178. The axis of rotation 178 extends through each pin. The base member 152 is movable in a clockwise and a counter clockwise direction about the axis of rotation 178. Movement of the base member 152 about the axis of rotation 178 enables the third segment 122 to move as described above. For example, in an embodiment, movement of the base member 152 in a clockwise direction moves the third segment 122 from its first position to its second position. In this embodiment, movement of the base member 152 in a counter clockwise direction moves the third segment 122 from its second position to its first position. Preferably, as is illustrated, the third segment 122 is provided above the axis of rotation 178. In these embodiments, the axis of rotation 178 is provided in a generally parallel relationship with the third segment 122.
When one or more of the other segments 118, 120, 124 move as described above, it is preferred that each of the respective base members connected to a segment 118, 120, 124 that moves and each of the segments 118, 120, 124 connected thereto move in a manner similar to the one described above for the third segment 122 and the base member 152. When a base member 152A, 152B moves the first segment 118 and/or second segment 120 from its first position to its second position and vice versa, it is preferred that each base member 152A, 152B has an axis of rotation which is provided in a perpendicular relationship with the axis of rotation 178 described above. However, in embodiments where a segment is not movable such as, for example, when the fourth segment 124 has a fixed position, it is preferred that the first bending tool 112 comprises a base member 152C that is configured such that it does not move about an axis of rotation. In these embodiments, the base member 152C, which is illustrated in
Movement of the base member 152 about the axis of rotation 178 can be achieved utilizing one or more drive assemblies 180. For example, a pair of drive assemblies 180 may be provided to move the base member 152 about the axis of rotation 178. Referring now to
Preferably, when a pair of drive assemblies 180 are provided to move the base member 152 about the axis of rotation 178, the drive assemblies 180 are connected to each other via a first transfer shaft assembly 188. The first transfer shaft assembly 188 may comprise a single shaft or two or more shafts. The first transfer shaft assembly 188 receives torque from a first motor 190 connected to the first transfer shaft assembly 188. The torque received by the first transfer shaft assembly 188 is communicated to the pair of drive assemblies 180 connected to the first transfer shaft assembly 188. The torque received by the pair of drive assemblies 180 is utilized to power each drive 182.
Similarly, when one or more additional base members are provided to move one or more of the other segments 118, 120, 124 in a manner similar to the one described above, it is preferred that the one or more additional base members move about an axis of rotation as described above. In some of these embodiments, the movement of the one or more additional base members can be achieved utilizing one or more additional drive assemblies 180A, 180B. It is preferred that the one or more additional drive assemblies 180A, 180B are configured in the same manner as the one or more drive assemblies 180 described above. In an embodiment, the one or more additional drive assemblies 180A, 180B comprise a first pair of drive assemblies 180A and the second pair of drive assemblies 1808. In this embodiment, the first pair of drive assemblies 180A and the second pair of drive assemblies 180B are connected to each other via a second transfer shaft assembly 192. The second transfer shaft assembly 192 may comprise a single shaft or two or more shafts. Connecting the first pair of drive assemblies 180A and the second pair of drive assemblies 180B to each other via the second transfer shaft assembly 192 enables, for example, the base member 152A connected to the first segment 118 and the base member 152B connected to the second segment 120 to move about respective axes of rotation in a simultaneous manner. Enabling the base members 152A, 152B to move in a simultaneous manner, allows the first segment 118 and the second segment 120 to move at the same time as described above.
The second transfer shaft assembly 192 receives torque from a second motor 194 connected to the second transfer shaft assembly 192. The torque received by the second transfer shaft assembly 192 is communicated to the first pair of drive assemblies 180A and the second pair of drive assemblies 180B connected to the second transfer shaft assembly 192. The torque received by the first pair of drive assemblies 180A and the second pair of drive assemblies 180B is utilized to power each respective drive 182 as described above.
The first motor 190 and the second motor 194 may be regulated by one or more controllers (not depicted). The one or more controllers regulate the first motor 190 and the second motor 194 by providing signals which direct power to the first motor 190 and the second motor 194. In an embodiment, power may be directed to the first motor 190 prior to directing power to the second motor 194. In other embodiments, power may be directed to the first motor 190 after directing power to the second motor 194.
When it is desired to move the first segment 118 from its first position to its second position and the second segment 120 from its first position to its second position, power may be directed to the second motor 194. When it is desired to move the third segment 122 from its first position to its second position, power may be directed to the first motor 190. Thus, when it is desired to move the first segment 118 from its first position to its second position and the second segment 120 from its first position to its second position at the same time and prior to moving the third segment 122 from its first position to its second position, power is directed to the first motor 190 after directing power to the second motor 194.
The one or more controllers may be in communication with and provide signals to other portions of the first bending tool 112. Additionally, the one or more controllers may be in communication with and provide signals to the plurality of rollers 138 and the fluid pad assembly 140. The signals provided by the one or more controllers to the first bending tool 112 and a drive mechanism (not depicted) may direct movement of the first bending tool 112, plurality or rollers 138, and/or fluid pad assembly 140 vertically in a downward direction or in an upward direction. It should also be appreciated that, in certain embodiments, the one or more controllers are in communication with and provide a signal to the second bending tool 114 to direct movement of the second bending tool 114 vertically in a downward direction or in an upward direction. The one or more controllers may also be in communication with and provide signals to the centering device 102 to regulate positioning of the glass sheet 106 prior to the glass sheet 106 being deposited on the first bending tool 112.
In certain embodiments, the one or more controllers may operate and/or provide the signals described above under the control of a set of programming instructions, which may also be referred to as software. The one or more controllers may include a memory (not depicted) in which programming instructions are stored. In an embodiment, the set of programming instructions enables the one or more controllers to regulate a flow of fluid, positioning of the glass sheet 106 relative to the shaping surface 116, and/or movement of the bending tools 112, 114, plurality of rollers 138, and fluid pad assembly 140 in a predetermined sequence.
The one or more controllers may also receive signals. For example, the one or more controllers may be in communication with an optical sensor (not depicted) which indicates the location of the glass sheet 106 in the glass shaping line 100. In other embodiments, the one or more controllers may receive a signal from the centering device 102, second bending tool 114, one or more valves, and/or a drive mechanism connected to the plurality of rollers 138 and fluid pad assembly 140.
After the glass sheet 106 has been deposited on the first bending tool 112 and prior to being shaped, the position of the glass sheet 106 may be adjusted relative to the shaping surface 116 of the first bending tool 112. To adjust the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112, at least one of the segments 118-124 moves as described above from its first position to its second position to cause contact between one or more portions of the glass sheet 106 and one or more positioning assemblies 196, 196A, 196B. In an embodiment, the first segment 118 moves from its first position to its second position to cause contact between the first portion of the glass sheet 106 and the one or more positioning assemblies 196, 196A, 196B. In this embodiment, the first portion of the glass sheet 106 may be the first pillar edge portion of the glass sheet 106. However, in other embodiments, the first portion of the glass sheet 106 is the second pillar edge portion of the glass sheet 106. In still other embodiments, the first portion of the glass sheet 106 may be the leading edge portion or the trailing edge portion of the glass sheet 106. Preferably, a second portion of the glass sheet 106 is contacted by one or more positioning assemblies 196, 196A, 196B to adjust the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. In an embodiment, the second segment 120 moves from its first position to its second position to cause contact between the second portion of the glass sheet 106 and the one or more positioning assemblies 196, 196A, 196B. In this embodiment, the second portion of the glass sheet 106 may be the second pillar edge portion of the glass sheet. However, in other embodiments, the second portion of the glass sheet may be the first pillar edge portion of the glass sheet. In still other embodiments, the second portion of the glass sheet 106 may be the leading edge portion or the trailing edge portion of the glass sheet 106. In still other embodiments, a third portion of the glass sheet 106 is contacted by one or more positioning assemblies 196, 196A, 196B to adjust the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. In some embodiments, the third segment 122 moves from its first position to its second position to cause contact between the third portion of the glass sheet 106 and the one or more positioning assemblies 196, 196A, 196B. In one such embodiment, the third portion of the glass sheet 106 is the trailing edge portion of the glass sheet 106. However, another embodiment, the third portion of the glass sheet 106 is the leading edge portion of the glass sheet 106. In other embodiments, the third portion of the glass sheet 106 may be the first pillar edge portion or the second pillar edge portion of the glass sheet 106. It may also be preferred that a fourth portion of the glass sheet 106 is contacted by one or more positioning assemblies 196, 196A, 196B to adjust the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. In some embodiments, the fourth segment 124 moves from its first position to its second position to cause contact between the fourth portion of the glass sheet 106 and the one or more positioning assemblies 196, 196A, 196B. In one such embodiment, the fourth portion of the glass sheet 106 is the leading edge portion of the glass sheet 106. However, another embodiment, the fourth portion of the glass sheet 106 is the trailing edge portion of the glass sheet 106. In other embodiments, the fourth portion of the glass sheet 106 may be the first pillar edge portion or the second pillar edge portion of the glass sheet 106.
Contacting one or more portions of the glass sheet 106 with the one or more positioning assemblies 196, 196A, 196B adjusts the position of the glass sheet 106, if necessary, to a desired position on the shaping surface 116 of the first bending tool 112. In order to cause contact between one or more portions of the glass sheet 106 and the one or more positioning assemblies 196, 196A, 196B, it is preferred that the one or more positioning assemblies 196, 196A, 196B are disposed adjacent a periphery of the shaping surface 116 of the first bending tool 112. Each of the one or more positioning assemblies 196, 196A, 196B are configured to contact a portion of the glass sheet 106 to adjust the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. Preferably, the one or more positioning assemblies 196, 196A, 196B are each similarly configured. However, the method can be practiced utilizing and the first bending tool 112 can be configured when one or more of the one or more positioning assemblies 196, 196A, 196B are not similarly configured.
It is preferred that each positioning assembly 196, 196A, 196B is in mechanical communication with a segment 118-124 and that each segment 118-124 has one or more positioning assemblies 196, 196A, 196B in mechanical communication therewith. For example, as illustrated, the first segment 118, second segment 120, third segment 122, and fourth segment 124 may each have one or more positioning assemblies 196, 196A in mechanical communication therewith. The one or more positioning assemblies 196, 196A, 196B in mechanical communication with a segment that moves, such as, for example, the first segment 118, move with the segment and, prior to contacting a portion of the glass sheet 106, in a direction which is toward the glass sheet 106. The positioning assemblies 196, 196A, 196B in mechanical communication with a segment that does not move, do not move in a direction which is toward the glass sheet 106 prior to contacting a portion of the glass sheet 106. For example, in an embodiment like the one illustrated best in
The features of the one or more positioning assemblies 196, 196A, 196B will now be described below. The one or more positioning assemblies 196, 196A, 196B may be described below with reference to the first segment 118. It should be appreciated that the embodiments of the one or more positioning assemblies 196, 196A, 196B described below could be utilized with any of the segments 118-124 described above.
As illustrated in
In certain embodiments, the first positioning assembly 196 moves with the first segment 118. In some of these embodiments, prior to contacting the glass sheet 106, the first positioning assembly 196 moves with the first segment 118 in a direction toward the glass sheet 106. In one such embodiment, the first positioning assembly 196 moves with the first segment 118 in a direction toward the glass sheet 106 to contact the first portion of the glass sheet 106. In embodiments where the second positioning assembly 196A is provided, the first positioning assembly 196 and the second positioning assembly 196A are spaced apart from each other. Also, movement of the second positioning assembly 196A is as described above for the first positioning assembly 196 and the second positioning assembly 196A contacts the first portion of the glass sheet 106 in a manner similar to the one described above for the first positioning assembly 196. After the glass sheet 106 is shaped, the first positioning assembly 196 and, when provided, the second positioning assembly 196A move with the first segment 118 in an opposite direction.
As described above, the first segment 118 moves from a first position to a second position. In an embodiment and after the first segment 118 moves from the first position, the first positioning assembly 196 contacts the first portion of the glass sheet 106. Preferably, the first portion is an edge portion of the glass sheet 106. The first positioning assembly 196 and, when provided, the second positioning assembly 196A may contact the first portion of the glass sheet 106 before the first segment 118 is in its second position. When the first segment 118 is in the second position and the first portion of the glass sheet 106 is the first pillar edge portion, the first pillar edge portion of the glass sheet 106 abuts an end surface 198 of the first positioning assembly 196 as is illustrated in
As described above, the end surface 198 of the first positioning assembly 196 may contact the first pillar edge portion of the glass sheet 106 when the position of the glass sheet 106 is being adjusted relative to the shaping surface 116 of the first bending tool 112. Referring now to
A contact material (not depicted) may be attached to the body portion 200. When provided, it is preferred that the contact material covers the end surface 198 of the first positioning assembly 196. The contact material can be attached to the body portion 200 by one or more fasteners, welding, an adhesive, or by another method. Preferably, the contact material is coupled to a side of the body portion 200. When contact material is provided, it is preferred that the contact material separates the portion of the glass sheet 106 being contacted to adjust the position of the glass sheet 106 relative to the shaping surface 116 of first bending tool 112. In an embodiment, the contact material is formed from stainless steel wire woven cloth. However, the contact material may be formed from other cloth-like materials that are softer than the glass sheet 106 and suitable for high temperature applications.
A support member 204 receives a portion of the body portion 200. The body portion 200 is attached to the support member 204 via one or more pins 206, which are illustrated in
As noted above, the body portion 200 is configured to move vertically in an upward direction or a downward direction. It is preferred that the body portion 200 moves vertically in the downward direction from a first position to a second position and in the upward direction from the second position to the first position. Prior to shaping the glass sheet 106 or when the first positioning assembly 196 is in a rest state, the body portion 200 is in the first position. When the glass sheet 106 is being shaped, the body portion 200 is in the second position
When the body portion 200 is in the first position, an upper surface 212 of the body portion 200 is oriented in an oblique manner with respect to the shaping surface 116 of the first bending tool 112, which is depicted in
The first positioning assembly 196 also comprises one or more adjustment assemblies 218. As illustrated in
Each adjustment assembly 218 comprises an adjustment mechanism. In the embodiments illustrated in
Referring now to
During shaping of the glass sheet 106, the body portion 200 is in the second position. In the second position, the upper surface 212 of the body portion 200 is aligned or substantially aligned with the first major surface 146 of the glass sheet 106. Also, at this time, the end surface 198 may be provided in a parallel or substantially parallel relationship with the first pillar edge portion of the glass sheet 106. After shaping the glass sheet 106, the second bending tool 114 is removed from contact with first positioning assembly 196, which removes the force provided by the second bending tool 114 to the upper surface 212 of the body portion 200. After the second bending tool 114 is removed from contact with the first positioning assembly 196, the force applied by the biasing member(s) 226, 226A returns the body portion 200 to its first position by moving the body portion 200 from the second position to the first position.
In an embodiment, when it is desired to adjust the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112, the first segment 118 is moved from a first position to a second position. Moving the first segment 118 from its first position to its second position causes the first portion of the glass sheet 106 to be contacted one or more positioning assemblies 196, 196A, 196B in mechanical communication with the first segment 118. Contacting the first portion of the glass sheet 106 with the more positioning assemblies 196, 196A, 196B in mechanical communication with the first segment 118 adjusts the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. In the second position, the one or more positioning assemblies 196, 196A, 196B in mechanical communication with the first segment 118 contact the first portion of the glass sheet 106. In this embodiment, the first portion of the glass sheet 106 may be the first pillar edge portion of the glass sheet 106. Preferably, a second portion of the glass sheet 106 is contacted to adjust the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. Preferably, the second portion of the glass sheet 106 is an edge portion of the glass sheet 106. To contact the second portion of the glass sheet 106, a second segment 120 may be moved from a first position to a second position. Moving the second segment 120 from its first position to its second position causes the second portion of the glass sheet 106 to be contacted one or more positioning assemblies 196, 196A, 196B in mechanical communication with the second segment 120. Contacting the second portion of the glass sheet 106 with the more positioning assemblies 196, 196A, 196B in mechanical communication with the second segment 120 adjusts the position of the glass sheet relative to the shaping surface 116 of the first bending tool 112. In the second position, the one or more positioning assemblies 196, 196A, 196B in mechanical communication with the second segment 120 contact the second portion of the glass sheet 106. In this embodiment, the second portion of the glass sheet 106 may be the second pillar edge portion of the glass sheet 106. In some embodiments, a third portion of the glass sheet 106 is contacted to adjust the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. Preferably, the third portion of the glass sheet 106 is an edge portion of the glass sheet 106. To contact the third portion of the glass sheet 106, it is preferred that a third segment 122 is moved from a first position to a second position. Moving the third segment 122 from its first position to its second position causes the third portion of the glass sheet 106 to be contacted one or more positioning assemblies 196, 196A, 196B in mechanical communication with the third segment 122. Contacting the third portion of the glass sheet 106 with the more positioning assemblies 196, 196A, 196B in mechanical communication with the third segment 122 adjusts the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. In the second position, the one or more positioning assemblies 196, 196A, 196B in mechanical communication with the third segment 122 contact the third portion of the glass sheet 106. In this embodiment, the third portion of the glass sheet 106 may be the trailing edge portion of the glass sheet 106. In further embodiments, a fourth portion of the glass sheet 106 may be contacted to adjust the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. Preferably, the fourth portion of the glass sheet 106 is an edge portion of the glass sheet 106. To contact the fourth portion of the glass sheet 106, it is preferred that the fourth segment 124 does not move toward the glass sheet 106. Instead, in this embodiment, the glass sheet 106 moves toward the one or more positioning assemblies 196, 196A, 196B in mechanical communication with the fourth segment 124 to cause contact between the fourth portion of the glass sheet 106 and the one or more positioning assemblies 196, 196A, 196B in mechanical communication with the fourth segment 124. Contact between the fourth portion of the glass sheet 106 and the one or more positioning assemblies 196, 196A, 196B in mechanical communication with the fourth segment 124 positions the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. In this embodiment, the fourth portion of the glass sheet 106 may be the leading edge portion of the glass sheet 106. After the glass sheet 106 has been contacted as described above and is in a desired position relative to the shaping surface 116 of the first bending tool 112 in accordance with one of the embodiments described above, the glass sheet 106 is shaped.
Contacting one or more portions of the glass sheet 106 as described above adjusts the position of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112. Advantageously, such positioning of the glass sheet 106 relative to the shaping surface 116 of the first bending tool 112 results in improved alignment between the glass sheet 106 and the shaping surface 116 prior to shaping. The improved alignment imparts the glass sheet 106 with the desired properties and ensures the glass sheet 106 is of a high quality after shaping. Furthermore, when the glass shaping line 100 and first bending tool 112 include the fluid pad assembly 140, optical distortion caused by marks on the glass sheet 106 may be reduced when compared with other shaping methods and glass shaping lines.
Referring back to
During pressing, a vacuum may be drawn on passages 236 formed in the second bending tool 114 to facilitate forming the glass sheet 106 into a desired shape. Upon completion of shaping the glass sheet 106, the glass sheet 106 may be released from the second bending tool 114 by way of positive pressure being applied through the passages 236 of the second bending tool 114.
Upon completion of the bending process, a conveying device (not shown) serves to transport the shaped glass sheet 106 into a lehr 238. In the lehr 238, the shaped glass sheet 106 may be tempered or annealed as known in the art and cooled to a temperature at which handling can occur. The shaped glass sheet 106 may be used in the construction of a window for a vehicle, such as a windscreen, side window, sunroof or a rear window. Such a window may be monolithic or laminated.
In accordance with the provisions of the patent statutes, the present invention has been described in what is considered to represent its preferred embodiments, however, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its scope or spirit.
This application is claiming the benefit, under 35 U.S. C. 119(e), of the provisional U.S. patent application which was granted Ser. No. 62/425,954 and filed on Nov. 23, 2016, the entire disclosure of which is hereby incorporated by reference.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/GB2017/053527 | 11/23/2017 | WO | 00 |
| Number | Date | Country | |
|---|---|---|---|
| 62425954 | Nov 2016 | US |
