The disclosed concept relates generally to seal pack arrangements and, more particularly to adjustable seal pack arrangements for use in can bodymakers for producing can bodies used in the food and beverage packaging industries. The disclosed concept further relates to can bodymakers employing such adjustable seal pack arrangements.
Generally, an aluminum can begins as a sheet of aluminum from which a circular blank is cut. The blank is formed into a “cup” having a bottom and a depending sidewall. The cup is fed into a can bodymaker which passes the cup through a toolpack that thins and elongates the cup, thus forming a can body. That is, the cup is disposed on a punch mounted on an elongated ram. The ram is structured to reciprocate and pass the cup through the toolpack which (re)draws and irons the cup. That is, on each forward stroke of the ram, a cup is passed through the toolpack which forms the cup into the can body. Near the start of the return stroke, the now elongated can body is removed from the ram prior to the punch passing backward through the toolpack. A new cup is disposed on the punch prior to the punch passing forward again through the toolpack. Following additional finishing operations, e.g., trimming, washing, printing, etc., each can body is sent to a filler which fills the can body with product. A top is then coupled to, and sealed against, the can body, thereby completing the can.
Seals made of a polymer material are used on a bodymaker to prevent cross contamination of coolant and oil. A barrier called a bulkhead separates the metal forming area from the drivetrain. The metal forming area utilizes a water-based detergent referred to as “coolant” to aide in the metal forming process. The drivetrain area contains a gear oil that can become acidic if oversaturated with water. The elongated ram and pushrods are in both areas simultaneously and the seals occupy the circumference of the ram and pushrods to stop cross contamination between the metal forming area and the drivetrain. If not centered correctly, the seals can swell causing premature wear and cross contamination which ultimately leads to premature component wear and oil loss. Additionally, when the seals are off center, they cause can cause the ram to drift which brings the punch off center with the toolpack resulting in an inconsistent or failed metal forming process.
Embodiments of the disclosed concept address shortcomings in the art by providing arrangements which align the seal pack with the ram body in a can bodymaker. As a first aspect of the disclosed concept, an adjustment arrangement for selectively adjusting a seal pack positioned about a ram body in a can bodymaker is provided. The adjustment arrangement comprises: a primary housing structured to have the seal pack fixedly coupled thereto; a secondary housing structured to be fixedly coupled to a bulkhead of the can bodymaker separating a forming area of the can bodymaker from a drivetrain area of the can bodymaker; and a number of adjustment elements engaged with both the primary housing and the secondary housing, each adjustment element being selectively moveable to adjust the relative positioning of the primary housing with respect to the secondary housing.
The number of adjustment elements may comprise a plurality of adjustment elements. The plurality of adjustment elements may comprise: a first adjustment element structured to adjust the positioning of the primary housing with respect to the secondary housing along a first axis; and a secondary adjustment element structured to adjust the positioning of the primary housing with respect to the secondary housing along a second axis orthogonal to the first axis.
The adjustment arrangement may further comprise a number of lockdown elements, each lockdown element being structured to selectively fix the positioning of the primary housing with respect to the secondary housing.
Each adjustment element may comprise: a cylindrical body positioned within a cooperatively sized aperture defined through the primary housing, the cylindrical body having a first end and a second end opposite the first end; an engagement arrangement positioned at the first end of the cylindrical body and structured to be engaged for rotating the cylindrical body within the aperture with respect to the primary housing; and an offset portion positioned at the second end of the cylindrical body and fixedly coupled therewith, the offset portion positioned within a groove defined in the secondary housing, wherein the offset portion is structured to engage the groove in a manner such that: rotation of the cylindrical body in a first rotational direction via engagement with the engagement arrangement results in movement of the primary housing in a first linear direction with respect to the secondary housing, and rotation of the cylindrical body in a second rotational direction via engagement with the engagement arrangement results in movement of the primary housing with respect to the secondary housing in a second linear direction opposite the first linear direction.
Each adjustment element of the number of adjustment elements may comprise an actuator. The actuator of each adjustment element may be one of an electric, hydraulic, pneumatic, or magnetic actuator. The adjustment arrangement may further comprise a controller in communication with the actuator of each adjustment element of the number of adjustment elements, and the controller may be structured to selectively operate each actuator. The adjustment arrangement may further comprise a number of sensors in communication with the controller, the number of sensors being structured to detect a positioning of the ram body with respect to the bulkhead, and the controller may be structured to receive position data from the number of sensors regarding the positioning of the ram body and, responsive thereto, control the actuator of each adjustment element to selectively position the primary housing and thus the seal pack coupled thereto with respect to the ram body.
Each adjustment element of the plurality of adjustment elements may comprise an electromagnetic arrangement structured to magnetically engage the primary housing with the secondary housing.
As another aspect of the disclosed concept, a can bodymaker is provided. The can bodymaker comprises: a frame; a forming area defined by the frame, the forming area housing a number of components for forming a can body; a drivetrain area defined by the frame, the drivetrain area housing a drivetrain; a bulkhead coupled to the frame, the bulkhead positioned to separate the forming area from the drivetrain area; an elongate ram body coupled to the drivetrain and extending from the drivetrain area into the forming area through a seal pack; and an adjustment arrangement for selectively adjusting a seal pack positioned about a ram body in a can bodymaker, the adjustment arrangement comprising: a primary housing having the seal pack fixedly coupled thereto; a secondary housing fixedly coupled to the bulkhead; and a number of adjustment elements engaged with both the primary housing and the secondary housing, each adjustment element being selectively moveable to adjust the relative positioning of the primary housing with respect to the secondary housing.
The number of adjustment elements may comprise a plurality of adjustment elements. The plurality of adjustment elements may comprise: a first adjustment element structured to adjust the positioning of the primary housing with respect to the secondary housing along a first axis; and a secondary adjustment element structured to adjust the positioning of the primary housing with respect to the secondary housing along a second axis orthogonal to the first axis.
The adjustment arrangement of the can bodymaker may further comprise a number of lockdown elements, each lockdown element being structured to selectively fix the positioning of the primary housing with respect to the secondary housing.
Each adjustment element may comprise: a cylindrical body positioned within a cooperatively sized aperture defined through the primary housing, the cylindrical body having a first end and a second end opposite the first end; an engagement arrangement positioned at the first end of the cylindrical body and structured to be engaged for rotating the cylindrical body within the aperture with respect to the primary housing; and an offset portion positioned at the second end of the cylindrical body and fixedly coupled therewith, the offset portion positioned within a groove defined in the secondary housing, wherein the offset portion is structured to engage the groove in a manner such that: rotation of the cylindrical body in a first rotational direction via engagement with the engagement arrangement results in movement of the primary housing in a first linear direction with respect to the secondary housing, and rotation of the cylindrical body in a second rotational direction via engagement with the engagement arrangement results in movement of the primary housing with respect to the secondary housing in a second linear direction opposite the first linear direction.
Each adjustment element of the number of adjustment elements may comprise an actuator. The actuator of each adjustment element may be one of an electric, a hydraulic, a pneumatic, or a magnetic actuator. The adjustment arrangement may further comprise a controller in communication with the actuator of each adjustment element of the number of adjustment elements, and the controller may be structured to selectively operate each actuator. The adjustment arrangement of the can bodymaker may further comprise a number of sensors in communication with the controller, the number of sensors being structured to detect a positioning of the ram body with respect to the bulkhead, and the controller may be structured to receive position data from the number of sensors regarding the positioning of the ram body and, responsive thereto, control the actuator of each adjustment element to selectively position the primary housing and thus the seal pack coupled thereto with respect to the ram body.
Each adjustment element of the plurality of adjustment elements may comprise an electromagnetic arrangement structured to magnetically engage the primary housing with the secondary housing.
These and other objects, features, and characteristics of the disclosed concept, as well as the methods of operation and functions of the related elements of structure and the combination of parts and economies of manufacture, will become more apparent upon consideration of the following description and the appended claims with reference to the accompanying drawings, all of which form a part of this specification, wherein like reference numerals designate corresponding parts in the various figures. It is to be expressly understood, however, that the drawings are provided for the purpose of illustration and description only and are not intended as a definition of the limits of the concept.
A full understanding of the invention can be gained from the following description of the preferred embodiments when read in conjunction with the accompanying drawings in which:
The specific elements illustrated in the drawings and described herein are simply exemplary embodiments of the disclosed concept. Accordingly, specific dimensions, orientations and other physical characteristics related to the embodiments disclosed herein are not to be considered limiting on the scope of the disclosed concept.
As employed herein, the term “can” refers to any known or suitable container, which is structured to contain a substance (e.g., without limitation, liquid; food; any other suitable substance), and expressly includes, but is not limited to, beverage cans, such as beer and soda cans, as well as cans used for food.
As used herein, “coupled” means a link between two or more elements, whether direct or indirect, so long as a link occurs. An object resting on another object held in place only by gravity is not “coupled” to the lower object unless the upper object is otherwise maintained substantially in place. That is, for example, a book on a table is not coupled thereto, but a book glued to a table is coupled thereto.
As used herein, “directly coupled” means that two elements are coupled in direct contact with each other.
As used herein, “fixedly coupled” or “fixed” means that two components are coupled so as to move as one while maintaining a constant orientation relative to each other. The fixed components may, or may not, be directly coupled.
As used herein, the word “unitary” means a component is created as a single piece or unit. That is, a component that includes pieces that are created separately and then coupled together as a unit is not a “unitary” component or body.
As used herein, “associated” means that the identified components are related to each other, contact each other, and/or interact with each other. For example, an automobile has four tires and four hubs, each hub is “associated” with a specific tire.
As used herein, “engage,” when used in reference to gears or other components having teeth, means that the teeth of the gears interface with each other and the rotation of one gear causes the other gear to rotate as well.
As employed herein, the term “number” shall mean one or an integer greater than one (i.e., a plurality).
As used herein, “normal operation” of a bodymaker shall mean operating the bodymaker in a full production mode over an extended period of time with the intention of producing an optimum volume of can bodies for the particular bodymaker over such time.
As used herein, two elements that are “cooperatively sized” are sized so as to allow one of the elements to fit within the other element in a manner such that the elements may move with respect to each other but with minimal tolerance.
As used herein, an “electromagnetic adjustment arrangement” is an arrangement for adjusting the positioning of an element or elements that utilizes controlled electromagnetic forces to control/adjust the positioning of the element or elements.
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From the foregoing examples it is thus to be appreciated that the disclosed concepts provide for arrangements that improve upon existing arrangements by providing for adjustability of the tool pack through which the ram body of a can bodymaker extends.
While specific embodiments of the invention have been described in detail, it will be appreciated by those skilled in the art that various modifications and alternatives to those details could be developed in light of the overall teachings of the disclosure. Accordingly, the particular arrangements disclosed are meant to be illustrative only and not limiting as to the scope of disclosed concept which is to be given the full breadth of the claims appended and any and all equivalents thereof.
In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word “comprising” or “including” does not exclude the presence of elements or steps other than those listed in a claim. In a device claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The word “a” or “an” preceding an element does not exclude the presence of a plurality of such elements. In any device claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The mere fact that certain elements are recited in mutually different dependent claims does not indicate that these elements cannot be used in combination.