The present invention relates to an apparatus for setting a core in a molding machine for molding a pair of upper and lower molds by using a match plate, a molding machine, and a method for setting the core.
Conventional molding machines, which mold a pair of upper and lower flaskless molds using a match plate, have been disclosed in publications such as International Publication WO 02/43901 (FIG. 3). In the molding machine of this publication, a lower flask is configured to move back and forth. The flask is transported from the machine to set a core by a core-setter, which is located above the flask.
The machines disclosed in the above publications require that the lower flask be configured to move back and forth. Thus, its configuration becomes complicated. In addition, a core is set under the condition that the lower flask is transported outside the machine, that is, the flask is elevated while it is supported as a cantilever. Thus, no accuracy of the core-setting is maintained. These have been problems.
To solve the problems, the object of the present invention is to provide an apparatus for setting a core, a molding machine, and a method for setting a core that have simple configurations and maintain a high accuracy for the core-setting.
To achieve the object, an apparatus for setting a core of the present invention in a molding machine that comprises an upper flask, a lower flask, a match plate clamped between the upper flask and the lower flask, and an upper and a lower squeezing member for forming molding spaces by being inserted into the upper and lower flasks, respectively, wherein a core is set in the lower mold in a state that the upper mold, the lower mold, and the match plate are separate from each other, the apparatus comprising a jig for a core having a means for holding the core and a rotary shaft and being rotatably supported by the rotary shaft wherein the means for holding the core detachably holds the core at the jig for the core, and a carriage for a core rotatably supporting the rotary shaft and being transported to and from a position above the lower mold; wherein an actuator for elevating the match plate transported to a position between the upper flask and lower flask elevates the carriage for the core and the jig for the core that are transported to a position above the lower mold, which actuator is attached to the molding machine.
The molding machine of the present invention comprises the apparatus for setting a core, wherein mechanisms for transporting a match plate are positioned at each side of a molding station clamping the match plate by the upper flask and the lower flask wherein one mechanism faces the other mechanism, and wherein one of the mechanisms transports the jig for the core and the carriage for the core to and from the position above the lower mold.
To achieve the object, a method for setting a core of the present invention in a molding machine that comprises an upper flask, a lower flask, a match plate clamped between the upper flask and the lower flask, and an upper and a lower squeezing member for forming molding spaces by being inserted into the upper and lower flasks, respectively, wherein a core is set in the lower mold in a state that the upper mold, the lower mold, and the match plate are separate from each other, the method comprising the steps of: holding a core by a jig for a core, the jig having a means for holding a core and a rotary shaft and being rotatably supported by the rotary shaft, the means detachably holding a core at the jig for the core, wherein the core is held by the jig for the core by activating the means for holding the core after placing the core in the jig for the core; rotating the jig for the core to have the core held by the jig face downward; transporting a carriage for a core, which rotatably supports the rotary shaft of the jig, to a position above the lower mold so that the core, which is held by the jig, faces the lower mold; lowering the core held by the jig to abut or nearly abut the lower mold by activating an elevating actuator that is attached to the molding machine and elevates the match plate, which is transported to a position between the upper flask and the lower flask; releasing the core from the means for holding the core to set it on the lower mold while the means is lowered; elevating the carriage for the core and the jig for the core by activating the elevating actuator; and transporting the carriage for the core and the jig for the core away from the position above the lower mold.
The method for setting a core in the molding machine of the present invention is characterized by releasing the core from the means for holding the core while the core that is held by the jig is lowered to abut or nearly abut the lower mold, and pressuring the core with compressed air to set the core on the lower mold.
To achieve the object, the apparatus for setting a core of the present invention in a molding machine that comprises an upper flask, a lower flask, a match plate clamped between the upper flask and the lower flask, and an upper and a lower squeezing member for forming molding spaces by being inserted into the upper and lower flasks, respectively, wherein a core is set in the lower mold in a state that the upper mold, the lower mold, and the match plate are separate from each other, the apparatus comprising: a jig for a core having a means for holding a core wherein the means detachably holds the core at the jig for the core; and a carriage for a core being connected to the jig and being transported to and from a position above the lower mold; wherein an actuator for elevating the match plate transported to a position between the upper flask and the lower flask elevates the carriage for the core and the jig for the core that are transported to a position above the lower mold, which actuator is attached to the molding machine.
The apparatus for setting a core in the molding machine of the present invention further comprises a jig for transporting a core being transported to and from a position below the jig for the core and being elevated.
The molding machine of the present invention is characterized by comprising the apparatus for setting a core, a mechanism for transporting the match plate to and from a position between the upper and lower flasks at one of the sides of a molding station for clamping the match plate by the upper flask and the lower flask, and a mechanism for transporting a jig for the core and the carriage for the core to and from a position above the lower mold at another side, where the mechanism for transporting the jig and the carriage faces the mechanism for transporting the match plate.
A method for setting a core of the present invention in a molding machine that comprises an upper flask, a lower flask, a match plate clamped between the upper flask and the lower flask, and an upper and a lower squeezing member for forming molding spaces by being inserted into the upper and lower flasks, respectively, wherein a core is set in the lower mold in a state that the upper mold, the lower mold, and the match plate are separate from each other, the method comprising the steps of holding a core by a jig for a core, the jig having a means for holding a core for detachably holding a core at the jig for the core, wherein a core is held by the jig for the core by activating the means for holding the core after placing the core in the jig for the core; transporting a carriage for a core, which is connected to the jig, to a position above the lower mold so that the core, which is held by the jig, faces the lower mold; lowering the core held by the jig to abut or nearly abut the lower mold by activating an elevating actuator that is attached to the molding machine and elevates the match plate, which is transported to a position between the upper flask and the lower flask; releasing the core from the means for holding the core to set it on the lower mold while the means is lowered; elevating the carriage for the core and the jig for the core by activating the elevating actuator; and transporting the carriage for the core and the jig for the core away from the position above the lower mold.
Since the apparatus for setting a core of the present invention is used in a molding machine that comprises an upper flask, a lower flask, a match plate clamped between the upper flask and the lower flask, and an upper and a lower squeezing member for forming molding spaces by being inserted into the upper and lower flasks, respectively, wherein a core is set in the lower mold in a state that the upper mold, the lower mold, and the match plate are separate from each other, and is configured to comprise a jig for a core having a means for holding a core and a rotary shaft and being rotatably supported by the rotary shaft wherein the means detachably holds a core at the jig for the core, and a carriage for a core for rotatably supporting the rotary shaft and being transported to and from a position above the lower mold, wherein an actuator for elevating the match plate transported to a position between the upper flask and lower flask elevates the carriage for the core and the jig for the core that are transported to a position above the lower mold, which actuator is attached to the molding machine, the present invention has advantageous effects such as simplifying the configuration of the apparatus and the machine and maintaining a high accuracy in setting a core.
The basic Japanese patent applications No. 2008-023626, filed Feb. 4, 2008 and No. 2008-182578, filed Jul. 14, 2008 are hereby incorporated in their entirety by reference into the present application.
The present invention will become more fully understood from the detailed description given below. However, the detailed description and the specific embodiment are illustrations of desired embodiments of the present invention, and are described only for an explanation. Various changes and modifications will be apparent to those of ordinary skill in the art on the basis of the detailed description.
The applicant has no intention to dedicate to the public any disclosed embodiment. Among the disclosed changes and modifications, those which may not literally fall within the scope of the present claims constitute, therefore, a part of the present invention in the sense of the doctrine of equivalents.
The use of the articles “a,” “an,” and “the” and similar referents in the specification and claims are to be construed to cover both the singular and the plural, unless otherwise indicated herein or clearly contradicted by the context. The use of any and all examples, or exemplary language (e.g., “such as”) provided herein, is intended merely to better illuminate the invention, and so does not limit the scope of the invention, unless otherwise claimed.
Below the embodiments of the present invention will be described with reference to the drawings. First, a body A of a molding machine is described. As shown in
The auxiliary flask 6 and squeezing member 7 are fixed in their horizontal positions without rotating. The auxiliary flask 6 is positioned to abut the lower flask 3 when the upper flask 2 and the lower flask 3, which clamp the match plate 1, rotate to their vertical positions. The lower squeezing member 7 can be inserted into the lower flask 3 in its vertical position through the auxiliary flask 6.
A means 8 for introducing molding sand, which is located at the upper center of the body A, fills molding sand into a pair of molding spaces to be formed below it. In
As shown in
As shown in
As shown in
As shown in
As shown in
The plan view in
As shown in
Now, a mold-stripping means D is described. It is located at the lower-right position in
Now, a first mechanism for transporting a match plate B and a second mechanism for transporting a match plate C are described. They face each other and are on opposite sides of the molding station S1, which clamps the match plate 1 via the upper flask 2 and the lower flask 3.
As shown in
The mounting member 16 has side rollers 16a, 16a (see
As shown in
A cylinder 204a is attached to the connecting mechanism 204. To pass the mounting member 16 from the side of the first mechanism for transporting the match plate B to the side of the second mechanism for transporting the match plate C, the rails 203 and the mounting member 16 are connected by the extension of the cylinder 204a, as described below. The second mechanism for transporting the match plate C has an anchor rail 209. When the mounting member 16 is at the side of it, the side rollers 16a, 16a are placed on the anchor rail 209 and the bottom rollers 16b, 16b contact the sides of the rail 201.
As shown in
In
In the jig for the core 301, the part that is contacted by the core is made of resin and is replaceable (not shown). The jig for the core 301 has means for holding a core (not shown). In this embodiment, the means for holding the core is a suctioning means. It need not be a suctioning means. For example, it may be a clamping means for mechanically clamping the core.
The carriage for the core 302, like the mounting member 16, has side rollers (not shown) and bottom rollers 302a, 302a. When the mounting member 16 is passed to the side of the second mechanism for transporting the match plate C, the carriage for the core 302 is placed on the first mechanism for transporting the match plate B as shown in
Now, the operation of the abovementioned configuration is described. First, the step of preparing the jig for the core 301 and the carriage for the core 302 is described. FIG. 6 illustrates the state where the match plate 1 and the mounting member 16 are at the side of the first mechanism for transporting the match plate B and the rails 103 and the mounting member 16 are connected by the extension of the cylinder 104a. At this moment, the connecting mechanism 204 is located at the back end of the second mechanism for transporting the match plate C.
At this state, the normal movement of the rotary actuator 107 causes the swinging arm 106 to swing in the normal direction (the counterclockwise direction in
Then, the cylinder 204a is extended and the cylinder 104a is contracted. By these operations, the mounting member 16 is connected to the rails 203 of the second mechanism for transporting the match plate C and the connection of the mounting member 16 to the first mechanism for transporting the match plate B is released.
Then, the reverse movement of the rotary actuator 207 causes the swinging arm 206 to swing in the reverse direction (the clockwise direction in
Then, the jig for the core 301 and the carriage for the core 302 are placed on the first mechanism for transporting the match plate B, which is now empty, by a transporting means such as a hoist or a crane (not shown). Then the cylinder 104a is extended to connect the rails 103 of the first mechanism for transporting the match plate B to the carriage for the core 302 as shown in
Now, the operation after the preparation of the jig for the core 301 and the carriage for the core 302 as described above, is described. First, the normal movement of the rotary actuator 207 causes the swinging arm 206 to swing in the normal direction to transport the match plate 1 and the mounting member 16 to the molding station S1. That is, the match plate 1 with the mounting member 16 is inserted between the upper flask 2 and the lower flask 3 (see
The fourth cylinder 21 of the body A, which points downward, is contracted from the state shown in
Then, while the first cylinder 9 of the body A remains contracted, the pair of the eighth cylinders 25 of the body A is extended to swing the rotary frame 13 in the clockwise direction about the rotary shaft 11. Thus, the upper flask 2 and the lower flask 3, which clamp the match plate 1, and the upper squeezing member 4, are transported to the position between the first cylinder 9 and the auxiliary flask 6 and are set in their vertical positions. During this operation, the second cylinder 10 is extended by a predetermined length and the pair of the fifth cylinders 25 are contracted. Thus, the formation of the upper and lower molding spaces in
Next, compressed air from a supply source (not shown) is supplied to the injecting mechanism 28 of the sand tank 27 to fill the upper and lower molding spaces with molding sand by using the air. It is preferable in this filling to supply the compressed air to the sand tank 27 to shorten the time for introducing molding sand. However, this does not limit the present invention.
Then, the first cylinder 9 and the second cylinder 10 are extended to move the upper squeezing member 4 and the lower squeezing member 7 toward the match plate 1, respectively. Thus, the molding sand in the molding spaces is squeezed. By squeezing as mentioned above, an upper mold and a lower mold are formed in the upper and lower molding spaces, respectively.
Then, the eighth cylinder 25 is contracted to swing the rotary frame 13 in the counterclockwise direction. Thus, the upper flask 2 and the lower flask 3, which contain the upper mold and the lower mold, respectively, are transported.
Then, the fourth cylinder 21 is extended to elevate the upper flask 2. The sixth cylinder 23 is extended to push the match plate 1 away from the upper flask 2. At the same time, the seventh cylinder 24 is extended to push the match plate 1 away from the lower flask 3.
Then, the reverse movement of the rotary actuator 207 causes the swinging arm 206 to swing in the reverse direction to transport the match plate 1 and the mounting member 16 to the side of the second mechanism for transporting the match plate C. That is, the match plate 1 with the mounting member 16 is carried out from the position between the upper flask 2 and the lower flask 3. After they are positioned as shown in
Now, the core-setting is described. The jig for the core 301 is inclined to the back side (to the side of the body A) at a predetermined angle (30° in this embodiment) from the vertical position about the rotary shaft 303. This is the initial position of it. The core N is manually placed on the holding plane 301a, or placed by any other method. The core N is held on the jig for a core by using the suctioning means (see
Then, the rotary actuator 305 is activated in the normal direction to swing the jig for the core 301 in the normal direction (the counterclockwise direction in
Then, the normal movement of the rotary actuator 107 causes the swinging arm 106 to swing in the normal direction to transport the jig for the core 301 and the carriage for the core 302 to the molding station S1. Thus, the holding plane 301a of the jig for the core 301 faces downward while the carriage for the core 302 is above the lower mold. As a result, the core N, held by the jig for the core 301, faces the lower mold (see
Then the elevating actuator, which is attached to the body A and elevates the match plate 1 held between the upper flask 2 and the lower flask 3, is activated in the normal direction. That is, the third cylinder 20 is extended. Thus, the guide rail 19 is lowered. By doing so, the core N, which is held by the jig for the core 301 by means of the carriage for the core 302, is lowered to a position nearly abutting the lower mold (the clearance between the core N and the lower mold is 1 mm in this embodiment) (see
Then the elevating actuator is operated in the reverse direction. That is, the third cylinder 20 is contracted. Thus, the guide rail 19 is elevated to elevate both the carriage for the core 302 and the empty jig for the core 301 (see
Then, the reverse movement of the rotary actuator 107 causes the swinging arm 106 to swing in the reverse direction to transport the jig for the core 301 and the carriage for the core 302 to the side of the first mechanism for transporting the match plate B. Thus the jig for the core 301 and the carriage for the core 302 are carried out from the position above the lower mold (see
In the molding station S1, the ninth cylinder 403 of the mold-stripping means D is contracted to elevate the elevating frame 402, tenth cylinder 405, etc. Then, the fourth cylinder 21 is contracted to lower the upper flask 2 to pile it on the lower flask 3. The tenth cylinder 405 of the mold-stripping means D is extended to elevate the receiving member 404 to have it abut the bottom of the lower mold. Then, the fifth cylinder 22 is contracted to press the upper mold in the upper flask 2 downward by means of the upper squeezing member 4. At the same time, the tenth cylinder 405 is contracted. Then, the ninth cylinder 403 is extended to lower the receiving member 404. Thus, the upper and lower molds are taken out of the upper flask 2 and the lower flask 3. Then the fifth cylinder 22 is extended to elevate the upper squeezing member 4. Then, the extruding cylinder 406 is extended to push the piled upper and lower molds out of the receiving member 404. Thus, piled flaskless upper and lower molds are obtained.
Unlike the above embodiment, when molds are formed without a core, that is, when the core-setting is unnecessary, the match plate 1 and the mounting member 16 are transported to and from the molding station S1 by the first mechanism for transporting the match plate B, not by the second mechanism for transporting the match plate C. In such a case, the jig for the core 301 and the carriage for the core 302 are not placed on the first mechanism for transporting the match plate B.
By the present invention, the degree of the accuracy in the core-setting is kept higher because the core N is set within the body A of the molding machine, which is rigid and has a high accuracy. The jig for the core 301 is just transported to a position near the match plate 1 and between the upper flask 2 and the lower flask 3 in the body A so that the core N faces downward. In a conventional molding machine, the core-setting is performed such that the lower flask is carried out of the molding machine, that is, it is elevated on a cantilever. Thus, the accuracy deteriorates. In addition, by the present invention, the configuration of the molding machine is simplified, because the core-setting is performed within the body A of the molding machine, and so no means for transporting the lower flask longitudinally is required.
In the molding machine of the present invention, the elevating actuator, namely, the third cylinder 20, is attached to the body A and elevates the match plate 1 between the upper flask 2 and the lower flask 3. It also elevates the jig for the core 301 and the carriage for the core 302, which are transported to the position between the upper flask 2 and the lower flask 3. Thus, advantageous effects, such as reducing the number of actuators and making a smaller machine, are obtained.
Furthermore, in the molding machine of the present invention, the mechanisms for transporting the match plate are disposed at their respective side of the molding station S1, where the match plate 1 is clamped between the upper flask 2 and the lower flask 3. That is, the first mechanism for transporting the match plate B and the second mechanism for transporting the match plate C face each other at the sides. One of the mechanisms for transporting a match plate (the first mechanisms for transporting the match plate B in this embodiment) is configured to transport the jig for the core 301 and the carriage for the core 302 to and from the position above the lower mold. Thus, the core N can be manually placed on the holding plane 301a of the jig for the core 301 in its initial state and be held on the jig for the core 301 by operating the suctioning means concurrently with the operation of the body A, the second mechanism for transporting the match plate C, the mold stripping means D, etc, when the jig for the core 301 and the carriage for the core 302 are located at the side of the first mechanism for transporting the match plate B by being transported away from the position between the upper flask 2 and the lower flask 3 and neither the jig for the core 301 nor the carriage for the core 302 is operated. As a result, the efficiency of the operation can be enhanced.
In the embodiment, the core N, which is held by the jig for the core 301 by means of the carriage for the core 302, is lowered to the position nearly abutting the lower mold. However, this does not limit the scope of the invention. The core N may be lowered to abut the lower mold.
In the embodiment, the core N, which is held by the jig for the core 301 by means of the carriage for the core 302, is lowered to a position nearly or actually abutting the lower mold. Then the operation of the suctioning means is stopped, to release the core N from the jig for the core 301 while the core N is lowered. Thus, the core N is set on the lower mold. However, this does not limit the scope of the invention. It is preferable to set the core N on the lower mold by pressuring it with compressed air after stopping the operation of the suctioning means, because by doing so any fault in releasing the core N is prevented. Thus the certainty of releasing the core N increases. To press the core N with compressed air, the suction and compression means may be substituted for the suctioning means as the means for holding a core.
Furthermore, in the embodiment, the jig for the core 301 is rotated by rotating the rotary shaft 303, which is rotated by the rotary actuator 305. This does not limit the scope of the invention. An arm may be connected to an end of the rotary shaft 303. The rotary shaft may be rotated by the arm when a cylinder is extended and contracted. The rotary arm 303 may be rotated by a cam mechanism without an actuator.
Next, another embodiment, which differs from the above embodiment (“the first embodiment”), is described as the second embodiment. Its configuration differs from that of the first embodiment in that a mechanism for transporting the jig for a core E and a mechanism for transferring a core F are disposed instead of the second mechanism for transporting the match plate C. The configurations of the body A of the molding machine, the mold stripping means D, and the first mechanism for transporting the match plate B, are the same as those of the first embodiment. Below the second embodiment is described with reference to the drawings, where the same element as in the first embodiment has the same symbol, and so no explanation is repeated. In the second embodiment, the molding machine has only one mechanism for transporting the match plate B. It is referred to as the mechanism for transporting a match plate G.
As shown in
Now, the configuration of the mechanism for transporting the jig for the core E is described. The jig for the core 501 is connected to the carriage for the core 502. Thus, it can be transported to and from the position above the lower mold by means of the carriage for the core 502. In the jig for the core 501, the part that is contacted by the core is made of resin and is replaceable (not shown). The jig for the core 501 has means for holding a core (not shown). In this embodiment, the means for holding a core is a suctioning means. But it is not necessarily a suctioning means, and, for example, may be a clamping means for mechanically clamping the core. The carriage for the core 502 has side rollers 502a, 502a and bottom rollers 502b, 502b (see
As shown in
A pin 507a is attached to the connecting mechanism 507. The pin 507a penetrates a hole (not shown) in the carriage for the core 502. Thus, the rails 506 and the carriage for the core 502 are connected. The mechanism for transporting the jig for the core E comprises an anchor rail 512. When the carriage for the core 502 is positioned at the side of the mechanism for transporting the jig for the core E, the side rollers 502a, 502a are mounted on the anchor rail 512 and the bottom rollers 502b, 502b contact the sides of the rail 503.
Next, the configuration of the mechanism for transferring a core F, which is located below the mechanism for transporting the jig for the core E, is described. A jig for transporting a core 601 goes to and from the position below the jig for the core 501. As shown in
A holder 602 is fixed to the lower center of the jig for transporting the core 601. The guide rods 603, 603 are disposed below the jig for transporting the core 601. They are horizontally spaced. They slidably penetrate the holder 602. Both of their ends are supported by supporting plates 604, 604. The respective supporting plates 604, 604 are fixed to each end of the elevating frames 605. The frame 605 is disposed below the guide rods 603, 603. A lateral cylinder 606 is attached to one of the supporting plates 604. The tip of the piston rod of the lateral cylinder 606 is connected to the holder 602.
The respective bottom ends of the elevating frames 605 are connected to the tips of the piston rods of the elevating cylinders 607, 607. The elevating cylinders 607, 607 are attached to the supporting frames 608, 608. The guide rods 609, 609 are suspended from the bottom end of the elevating frame 605. They are located next to the elevating cylinders 607, 607 at opposing corners (see
Next, the operation of the machine having such a configuration is described. The upper and lower molds are formed. Then, they and the match plate 1 are separated. The match plate 1 is carried out of the molding station S1. Thus, their state is as shown in
The core-setting is started in this state. Now, the core-setting is described in detail. First, the core N is manually placed on the upper plane 601a of the jig for transporting the core 601 or placed by any other method (see
Then, the suctioning means is activated to hold the core N on the jig for the core 501 by suction. Then, the elevating cylinders 607, 607 are contracted to lower the jig for transporting the core 601 (see
Then, the normal movement of the rotary actuator 510 causes the swinging arm 509 to swing in the normal direction (the counterclockwise direction in
Then, the elevating actuator, which is attached to the body A and elevates the match plate 1 located between the upper flask 2 and the lower flask 3, is operated in the normal direction. That is, the third cylinder 20 (see
Then, the elevating actuator is activated in the reverse direction. That is, the third cylinder 20 is contracted to elevate the guide rail 19. Thus, the carriage for the core 502 and the empty jig for the core 501 are elevated (see
Then, the reverse movement of the rotary actuator 510 causes the swinging arm 509 to swing in the reverse direction to transport the jig for the core 501 and the carriage for the core 502 to the side of the mechanism for transporting the jig for the core E. Thus, the jig for the core 501 and the carriage for the core 502 are carried away from the position above the lower mold.
Then, in the molding station S1, the ninth cylinder 403 of the mold-stripping means D is contracted to elevate the elevating frame 402, the tenth cylinder 405, etc. Then, the fourth cylinder 21 is contracted to lower the upper flask 2 so that it is piled on the lower flask 3. The tenth cylinder 405 of the mold stripping means D is contracted to elevate the receiving member 404 so that it abuts the bottom of the lower mold. Following that, the fifth cylinder 22 is contracted to press the upper mold in the upper flask 2 downward by means of the upper squeezing member 4. At the same time, the tenth cylinder 405 is contracted. Then, the ninth cylinder 403 is extended to lower the receiving member 404. Thus, the upper and lower molds are taken out of the upper flask 2 and lower flask 3, respectively. Then, the fifth cylinder 22 is extended to elevate the upper squeezing member 4. Then, the extruding cylinder 406 is extended to push the piled upper and lower molds out of the receiving member 404. Therefore, piled upper and lower molds are obtained.
By the present invention, the degree of the accuracy in the core-setting is kept higher because the core N is set within the body A of the molding machine, which is rigid and has a high accuracy. The jig for the core 501 is just transported to a position near the match plate 1 and between the upper flask 2 and the lower flask 3 in the body A so that the core N faces downward. In a conventional molding machine, the core-setting is performed such that the lower flask is carried out of the molding machine, that is, it is elevated on a cantilever. Thus, the accuracy deteriorates. In addition, by the present invention, the configuration of the molding machine is simplified, because the core-setting is performed within the body A of the molding machine, and so no means for longitudinally transporting the lower flask is required.
In the molding machine of the present invention, the elevating actuator, namely, the third cylinder 20, is attached to the body A and elevates the match plate 1 between the upper flask 2 and the lower flask 3. It also elevates the jig for the core 501 and the carriage for the core 502, which are transported to the position between the upper flask 2 and the lower flask 3. Thus, advantageous effects, such as reducing the number of actuators and making a machine smaller, are obtained.
In the molding machine of the present invention, the mechanism for transporting a Match plate G is disposed at one side of the holding station S1, which clamps the match plate 1 between the upper flask 2 and the lower flask 3. The mechanism for transporting the jig for the core E, which transports the jig for the core 501 and the carriage for the core 502 to and from the position above the lower mold, is disposed at another side. Thus, the jig for the core 501 can hold the core N concurrently with the operations of the mechanism for transporting a match plate G, the mold stripping means D, etc.
The molding machine of the present invention comprises the jig for transporting the core 601, which is transported to the position below the jig for the core 501, and then elevated. Thus, if the jig for transporting the core 601 is empty at the end of the contracted lateral cylinder 606, an operator can place the core N on the upper plane 601a of the jig for transporting the core 601 concurrently with the operations of the mechanism for transporting the jig for the core E as well as the mechanism for transporting a match plate G, the mold stripping means D, etc. Therefore, sufficient time is reserved for an operator to place the core N on the plane 601a.
In the second embodiment, the core N, which is held by the jig for the core 501 by means of the carriage for the core 502, is lowered to the position nearly abutting the lower mold. This does not limit the scope of the invention. The core may be lowered to abut the lower mold.
In the second embodiment, the core N, which is held by the jig for the core 501 by means of the carriage for the core 502, is lowered to the position nearly or actually abutting the lower mold). Then the operation of the suctioning means is stopped to release the core N from the jig for the core 501 while the core N is lowered. Thus, the core N is set on the lower mold. However, this does not limit the scope of the invention. It is preferable to set the core N on the lower mold by pressuring it with compressed air after stopping the operation of the suctioning means, because any fault in releasing the core N is prevented. Thus the certainty of releasing the core N increases. To press the core N with compressed air, the suction and compression means may be substituted for the suctioning means as the means for holding a core.
In the second embodiment, the jig for transporting the core 601 is elevated by the elevating cylinders 607, 607 by means of the elevating frame 605. This does not limit the scope of the invention. The jig for transporting the core 601 may be directly held by an elevating means (not shown) without the use of the elevating frame 605.
Number | Date | Country | Kind |
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2008-023626 | Feb 2008 | JP | national |
2008-182578 | Jul 2008 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP2009/051157 | 1/26/2009 | WO | 00 | 5/25/2010 |
Publishing Document | Publishing Date | Country | Kind |
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WO2009/098955 | 8/13/2009 | WO | A |
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Number | Date | Country | |
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20100287759 A1 | Nov 2010 | US |