JP5381155B2 - Extrusion press - Google Patents

Description

  The present invention closes with a two-part seal block having a structure that can be attached to and detached from the fixed dummy block at the time of extrusion molding by an extrusion press of aluminum alloy or the like, and presses the seal member disposed on the container side of the seal block Improved extrusion press for effectively and wastefully extruding air between the container and billet after being pressed in, before the billet is extruded, and without entrapping air into the billet It is about.

  After a billet with a diameter slightly smaller than the inner diameter of the container is loaded into the container, the billet is pressed against the die by the rear extrusion stem in the container. Is done. In order to discharge the compressed air to the outside of the container, the extrusion stem and the container are slightly retracted, the compressed air is discharged from the gap between the die and the container, and the container and the extrusion stem are advanced again to start extrusion. . In this way, the degassing process for extracting compressed air is called a barp cycle, and this process causes a useless process in the extrusion cycle.

  In addition, in this method, when the container is degassed by a burp cycle and pressed against the die, air remains at atmospheric pressure in a thin state of about one skin between the container inner surface and the billet outer surface. Deaeration is not performed.

Therefore, as a deaerator of a conventional extrusion press that can easily and reliably remove residual air during billet extrusion, for example, Patent Document 1 and Patent Document 2 are disclosed. There is a special device.
In Patent Document 1, a container liner provided with a ring-shaped protrusion on the stem side end surface of a container loaded with a billet, and air that can be opened and closed in a direction intersecting the axial direction of the extrusion stem and remaining in the container The seal block is divided into two parts with exhaust holes to be discharged. When the seal block is closed, the outer peripheral surface of the ring-shaped projection and the outer peripheral surface of the extrusion stem are simultaneously brought into close contact with each other, and sealing is performed. A method is described in which air is sucked from the exhaust hole and deaerated.

In Patent Document 2, a container liner provided with a ring-shaped protrusion on the stem side end surface of a container loaded with a billet, and air that is openable and closable in a direction crossing the axial direction of the extrusion stem, The seal block is divided into two parts with an exhaust hole for discharging, and when the seal block is closed, the side end surface of the ring-shaped protrusion and the outer peripheral surface of the extrusion stem are simultaneously adhered to each other via a seal member attached to the seal block. The seal member attached to the ring-shaped protrusion side of the seal block by the pressing means is pressed against the side end surface of the ring-shaped protrusion in the extrusion direction to seal, and the air in the container is sucked from the exhaust hole And how to deaerate.
In any of the conventional deaeration devices described above, each of the two seal blocks moves in opposite directions along a guide attached to the upper and lower portions of the container end surface on the extrusion stem side to open and close (extrusion). It is configured to move horizontally in both the press operation side and the counter operation side. Further, the retracted position when the seal block is released is set so as not to interfere with the billet loader on which the billet to be loaded into the container is placed and does not become an obstacle when replacing the container liner.

By the way, the supply of the billet into the container of the normal type extrusion press is performed by moving the billet loader on which the billet is placed in the gap between the end surface of the container and the end surface of the extruded stem that has been retracted after the end of extrusion. Performed by billet loading means.
The conventional type constructed as described above, using an orthogonal billet loader for supplying the billet into the container, supplying the billet to the extrusion press in the direction intersecting the axis of the extrusion press and in the horizontal direction to the axis. In the extrusion press using this deaeration device, even when the billet loader is provided on either the operation side or the counter-operation side of the extrusion press, the billet loader is disposed at a position avoiding interference with the deaeration device.
In order to avoid interference between the billet loader and the deaeration device, the extrusion stroke must be extended to ensure a gap, which increases the size of the equipment and increases the extrusion cycle time.

Further, the billet is transferred to the billet loader by the billet transfer device, but the billet carrier is also arranged at a position avoiding interference between the extrusion press axis of the deaeration device and the crossing direction.
In order to avoid the billet transfer device and the deaeration device, the movement stroke of the billet loader with respect to the extrusion press is lengthened, and the equipment becomes larger and the billet supply time becomes longer. And the enlargement of facilities hinders pace productivity.

Billet supply into the container of a rear-loading type short stroke extrusion press that secures a gap for feeding the billet after the extrusion stem is moved backward after completion of extrusion mainly comprises a billet inserter (insertion means). An orthogonal billet loader that runs in a direction crossing the axis of the extrusion press and in a direction horizontal to the axis is used.
The conventional deaeration device is used in the rear loading type short stroke extrusion press configured as described above, and the billet loader is a deaeration device regardless of whether the billet loader is provided on the operation side or the non-operation side of the extrusion press. It is arranged at a position that avoids interference with.
In order to avoid interference between the billet loader and the deaeration device, the extrusion stroke must be extended to ensure a gap, which increases the size of the equipment and increases the extrusion cycle time.

Further, the billet is transferred to the billet loader by the billet transfer device, and the billet carrier is also arranged at a position avoiding interference between the extrusion press axis line of the deaeration device and the crossing direction.
In order to avoid the billet transfer device and the deaeration device, the movement stroke of the billet loader with respect to the extrusion press is lengthened, and the equipment becomes larger and the billet supply time becomes longer. And the enlargement of equipment occupies an excessive installation area and hinders space productivity.

JP-A-9-57335 JP-A-10-156426

  The present invention has been made to solve this problem. The purpose of the present invention is to extend the extrusion stroke and to extend the movement stroke of the billet loader with respect to the extrusion press even if a direct billet loader is used. It is an object of the present invention to provide an extrusion press capable of improving the productivity of an extruded product having improved productivity and minimizing the installation space of equipment and improving the space productivity.

In order to achieve the above object, an extrusion press according to claim 1 is provided with a seal member adhered to an abutting surface of the seal block when the split seal block is closed and an inner peripheral surface of the seal block. The seal member provided on the container side end surface of the seal block is connected to the contact surface of the seal block and the outer peripheral surface of the extrusion stem or the fixed dummy block via the provided seal member. Extrusion press equipped with a seal block that can be pressed and brought into close contact with a pressing means that can move freely in the extrusion direction, and can be opened and closed by swinging the seal block in the direction intersecting the axial direction of the extrusion stem And is provided so as to be linearly movable in the direction intersecting the axial direction of the extrusion stem with the seal block opened.

The extrusion press according to claim 2 of the present invention is the extrusion press according to claim 1, wherein the linear movement direction of the seal block is opposed to the billet supply direction of the billet loader on which the billet loaded in the container is placed. It is characterized in that the direction is set.
The extrusion press according to claim 3 of the present invention is the extrusion press according to claim 1 or 2, wherein the seal block is provided with an exhaust hole for exhausting residual air in the container, The exhaust hole communicates with the vacuum pump.

  The seal block swings and is opened and closed in half, and includes a seal member that seals the split surface of the seal block, a seal member that seals the outer peripheral surface of the extrusion stem, and a seal member that seals the end surface of the container. In the opened state, the seal material moves in one direction from a predetermined standby position to the center position of the extrusion press, and the seal material seals the outer peripheral surface of the extrusion stem and the split surface of the seal block and moves in the extrusion direction. It was set as the structure which seals the end surface of a container. The deaerator having the seal block is installed on either the operation side or the non-operation side of the container by the configuration in which the means for opening and closing the seal block and the movement means for the seal block are received independently. It becomes possible. For this reason, the machine width can be reduced on any one side where the deaeration device is not disposed.

The forward movement direction of the split seal block was the direction opposite to the billet supply direction of the billet loader. As described above, the deaeration device is not disposed on the same surface as the container end surface on the opposite side where the deaeration device is installed, and the billet loader can be provided close to the end surface of the container. For this reason, a deaeration device can be provided in the extrusion press without extending the extrusion stroke.
Moreover, the deaeration apparatus which interferes with a billet transfer apparatus is not arrange | positioned, and a transfer apparatus can be provided close to the apparatus side. For this reason, the movement stroke with respect to the extrusion press of a billet loader can be shortened, and the supply time of a billet can be shortened.
With the above configuration, the equipment of the extrusion press can be prevented from becoming large, and the equipment cost can be reduced, and the installation area of the extrusion press can be reduced to improve space productivity.

  The split seal block was provided with an exhaust hole for exhausting residual air in the container, and the exhaust hole communicated with a vacuum pump. Thereby, deaeration with a sufficient seal and a high degree of vacuum can be performed. In addition, since the burp cycle is not performed as in the prior art, the extrusion cycle time can be shortened. Furthermore, it is possible to obtain an extrusion-molded product having a high yield and excellent quality by eliminating the mixing of blisters.

It is a figure explaining the whole structure concerning the present invention, and is a front view in which a seal block is in a retreat position. It is a front view in which a seal block is in an advanced position. It is an enlarged view explaining opening and closing operation of a seal block. It is sectional drawing of A arrow of FIG. It is sectional drawing of BB of FIG. It is sectional drawing which pressed the seal block to the stem side end surface of a container. It is sectional drawing of the C arrow of FIG. 3, and is explanatory drawing which shows the relationship with a vacuum pump.

  Embodiments of an extrusion press apparatus according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a container 15 including a container holder 12, a container tire 13, and a container liner 14 with respect to an end platen (not shown) of the extrusion press 10 can be moved forward and backward in the extrusion axis direction by a container cylinder (not shown). Is provided.
The deaeration device 30 for degassing the compressed air in the container generated at the time of upsetting is basically composed of a sealing means 31 and a moving means 32 of the sealing means 31, and can move horizontally on the end face of the container 15 on the extrusion stem side. It is arranged. Reference numeral 60 denotes an orthogonal billet loader provided with an inserter (a means for loading the billet into the container) for loading the billet 61 into the container 15, and the forward movement direction of the deaerator 30 (the center direction of the extrusion press). Is provided symmetrically with the axis of the extrusion press so as to move forward.
FIG. 1 shows a state in which the deaeration device 30 is moved backward to a predetermined position and the billet loader 60 is moved to the center position of the extrusion press to supply the billet 61 into the container 15.
Reference numeral 18 denotes a tie bar for connecting the end platen of the extrusion press and the main cylinder, and 17 is a precon tube.

The main part of the sealing means 31 includes a sealing block 40, a sealing block holding member 41, a fixed shaft 42, a slide plate 43, a guide 44, an opening / closing cylinder 45, a pressing cylinder 46, a pulling back means 80, and the like.
The moving means 32 is basically composed of a base plate 51, a guide receiver 52, and a moving cylinder 53. The base plate 51 is attached to the end face of the container 12 on the extrusion stem side, and a guide receiver 52 and a moving cylinder 53 are fixedly provided. The tip of the cylinder rod of the moving cylinder 53 is fixed to the slide plate 43 of the sealing means 31 via a connecting fitting, so that the sealing means 31 can be moved back and forth.

  As shown in FIG. 1, the slide plate 43 of the seal means 31 is pivotally supported by a fixed shaft 42 so as to be swingable by an open / close cylinder 45, and is inserted into a seal block 40, a seal block holding member 41, and a guide receiver 52. A guide 44 is attached. The guide rod 44 is attached to the back surface of the slide plate 43 and slidably moves in the guide receiver 52 when the sealing means 31 moves back and forth, thereby stably supporting the movement of the slide plate 43. A pressing cylinder 46 that moves the seal block 40 in the extrusion direction is provided at the center of the tip of the slide plate 43.

In FIG. 2, the seal means 31 is moved forward by the moving cylinder 53, the seal block holding member 41 and the seal block 40 are positioned on the axis of the extrusion press, and the billet loader 60 loaded with the billet 61 in the container 12 is provided. The state which moved to the predetermined retreat position which adjoined the side is shown.
The seal block holding member 41 and the seal block 40 are swung around the fixed shaft 42 by operating the opening / closing cylinder 45 and can be opened / closed with respect to the extrusion stem 19 or the fixed dummy block 20 provided at the tip of the extrusion stem 19. Has been.

As shown in FIGS. 3 and 4, the seal block 40 is closed by being driven by the opening / closing cylinder 45, and the extrusion stem 19 provided on the inner peripheral surface of the seal block 40 or the seal member 56 of the fixed dummy block 20 is moved to the extrusion stem 19. Alternatively, the seal members 58 of the divided surfaces attached to the divided surface of the seal block 40 are in close contact with the outer peripheral surface of the fixed dummy block 20.
The seal block 40 is provided with guide liners 48b to 50b, and the guide shaft 47 provided on the seal block holding member 41 and the guide liners 48a to 50a are guided to move and move in the pushing direction. It has become. A seal member 57 for sealing the stem side end surface of the container 15 is provided on the container side end surface of the seal block 40.
3, a state in which the seal block holding member 41 and the seal block 40 are released from the outer peripheral surface of the stem 19 is shown, and reference numeral 78 denotes a deaeration hole for discharging residual air in the container.

As shown in FIG. 4, a bearing bush 41 b is fitted to the bearing portion 41 a of the seal block holding member 41, and is supported by inserting a fixed shaft 42 through the bearing bush 41 b. The fixed shaft 42 is fixed to the slide plate 43 by a key plate. Reference numeral 41C denotes a distance piece (bearing spacing plate).
The closing operation of the seal block 40 is performed in the direction in which the cylinder rod of the open / close cylinder 45 is pulled out (cylinder pushing operation), so that the upper seal block 40 swings clockwise around the fixed shaft 42, and the lower side The seal block 40 is swung counterclockwise, and the opening operation is performed by operating the cylinder rod of the open / close cylinder 45 in the direction of pulling back (cylinder pulling operation). As described above, the seal block 40 is opened and closed by swinging in a direction in which one of the upper and lower parts divided in the vertical direction is opposed to each other about the fixed shaft 42.

  Further, as shown in FIG. 4, the seal member 57 that seals the stem-side end surface of the container 15 by moving the seal block 40 in the closed state in the closed state and pressing the seal block 40 against the stem-side end surface of the container 15 serves as the container liner 14. Close to the stem side end face. The pressing cylinder 46 is attached to the slide plate 43, and the cylinder rod of the pressing cylinder 46 is provided so as to be able to contact with and separate from the seal block 40. By driving the pressing cylinder 46 and sliding the seal block 40 on the contact surfaces of the guide liners 48b to 50b and the guide liners 48a to 50a, the stem side end surface of the container 15 can be pressed freely. Reference numeral 58 denotes a seal member that seals the divided surfaces of the seal block 40 in close contact with each other when the seal block 40 is closed.

  As shown in FIG. 5, the seal block holding member 41 is provided with pull-back means 80 for pulling the seal block 40 back to a predetermined position from the end surface of the container 15 on the extrusion system side. The pull-back means 80 is inserted into the seal block holding member 41, a shaft 81 having a tip end screwed to the seal block 40 and having a stepped portion at the end, a coil spring 82 to which the shaft 81 is moved and compressed, and a seal block holding A main part is constituted by a bearing 83 which is fitted to the member 41 and guides the movement of the shaft 81. Reference numeral 47 denotes a guide shaft of the seal block 40 fixed to the seal block holding member 41. By releasing the pressing force by the pressing cylinder 46, the seal block 40 can be returned to the original position by the restoring force of the compressed coil spring 82. FIG. 5 shows a state where the seal block 40 is in the return position.

As shown in FIG. 6, when the seal block 40 is closed, a pressing force is applied by the pressing cylinder 46 and moved in the pushing direction, whereby the stem side of the container 15 is sealed by the seal member 57 that seals the stem side end surface of the container 15. The end face is sealed.
In this way, the deaeration space 62 is externally formed by the seal member 56 that seals the outer peripheral surface of the fixed dummy block, the seal member 57 that seals the stem side end surface of the container 15, and the seal member 58 that seals the split surface of the seal block. It is cut off. The deaeration space 62 is a gap formed by the billet 61 and the container liner 14, and in the state shown in FIG. 6, the billet 61 is crushed by an operation of moving the extrusion stem 19 in the extrusion direction, a so-called upset operation, The air in the deaeration space 62 is compressed.

A configuration for discharging residual air in the deaeration space 62 to the outside when performing the upset operation will be described with reference to FIG.
The vacuum suction device 70 is basically composed of an electromagnetic valve 71, vacuum gauges 72 and 74, a vacuum tank 73, a vacuum pump 75, an electric motor 76 and a pipe 77. As shown in FIG. 6, the vacuum suction device 70 is activated in a state where the ventilation between the deaeration space 62 and the outside is blocked, and the electromagnetic valve 71 is excited to communicate the deaeration space 62 and the vacuum tank 73. Vacuum suction is performed.
The compressed air in the deaeration space 62 formed on the stem side of the container by the upset operation passes through a plurality of deaeration holes 78 provided in the seal block 40 and is sucked and discharged to the vacuum tank 73 via the piping 77 and the electromagnetic valve 71. Is done. In this way, the compressed air in the deaeration space 62 is quickly and sufficiently deaerated to the outside.

  To start the deaeration operation, the billet 61 is supplied to the extrusion press 10 by the billet loader 60, and the billet 61 is loaded into the container 15 by the inserter to which the billet loader 60 is attached. The billet loader 60 moves backward, then the extrusion stem 19 moves forward, and the sealing means 31 of the deaeration device 30 is moved forward in a state where the rear end of the billet 61 is pushed to a position close to the extrusion stem side end surface of the container 15. . Thereafter, the seal block 40 is closed, and the seal block 40 is further moved in the extrusion direction so that the deaeration space 62 and the vacuum suction device 70 communicate with each other.

Completion of the deaeration operation is a predetermined time after the upset is completed and the extrusion of the product started with the advancement of the extrusion stem 19 is started (for example, about 3 times from the initial length before the start of the extrusion of the billet 61). After the elapse of a minute (extruded state). At the same time, the pressure on the end face of the container 15 of the seal block 40 is released, the pressure is returned to the original position, and the seal block 40 is rocked and released. Next, the moving cylinder 53 of the moving means 32 is driven, and the sealing means 31 is moved to a predetermined retracted position of the extrusion press 10 and stopped.
After that, the extrusion press 10 continues the extrusion operation. When the extrusion is completed, the extrusion stem 19 is moved backward to supply the billet 61, and the next cycle starts.

As is apparent from the above description, in the present invention, the opening / closing means and the moving means of the split seal block are provided respectively, and the opening / closing of the split seal block is oscillated oppositely.
This makes it possible to place a degassing device that discharges the air remaining in the container on one side of the extrusion press. In an extrusion press equipped with a direct billet loader, degassing without extending the extrusion stroke The equipment could be installed and the quality of the extruded product was improved.
In addition, since the deaeration device is arranged on one side of the extrusion press, a billet transfer device for transferring the billet to the billet loader can be provided close to the extrusion press machine side. The travel stroke to the extrusion press was shortened, the cycle time for billet supply could be shortened, and the productivity of the extrusion press was improved.
Furthermore, it is possible to downsize equipment such as an extrusion press and a billet loader, thereby reducing the equipment cost and minimizing the installation area of the equipment and improving space productivity.

DESCRIPTION OF SYMBOLS 10 Extrusion press 15 Container 19 Extrusion stem 20 Fixed dummy block 30 Deaeration device 31 Sealing means 32 Moving means 40 Seal block 45 Opening and closing cylinder 46 Pressing cylinder 53 Moving cylinder 56 Sealing member of outer surface of extrusion stem or fixed dummy block 57 Extrusion of container Seal member on the stem side end surface 58 Seal member on the seal block contact surface 60 Billet loader 61 Billet 70 Vacuum suction device 78 Exhaust hole 80 Retraction means

Claims (3)

The contact surface of the seal block and the extrusion stem via the seal member adhered to the contact surface of the seal block when the two-part seal block is closed and the seal member provided on the inner peripheral surface of the seal block Alternatively, the pressing means can be brought into close contact with the outer peripheral surface of the fixed dummy block, and the sealing means provided on the container side end surface of the seal block is pressed against the stem side end surface of the container to be brought into close contact with the seal block, and the pressing means that can be contacted and separated is extruded. An extrusion press that is movably movable in a direction,
The seal block is provided so as to be able to open and close by swinging in a direction intersecting with the axial direction of the extrusion stem, and provided so as to be linearly movable in a direction intersecting with the axial direction of the extrusion stem in a state where the seal block is opened. Extrusion press. The extrusion press according to claim 1, wherein the linear movement direction of the seal block is a direction opposite to a billet supply direction of a billet loader on which a billet to be loaded into the container is placed. The extrusion press according to claim 1 or 2, wherein the seal block is provided with an exhaust hole for exhausting residual air in the container, and the exhaust hole communicates with a vacuum pump.

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