JP5381335B2 - Extrusion press machine for short stroke - 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 the air between the container and billet after being pressed in and before the billet is extruded, without entrapping the air into the billet It relates to the device.

  After the billet having a diameter smaller than the inner diameter of the container is sandwiched between the extrusion stem and the die and loaded into the container, the billet is pressed against the die by the extrusion stem in the container, and when the so-called upset is performed, the billet is crushed and The air between the billets is compressed. 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 conventional deaeration devices of an extrusion press device that can easily and reliably remove residual air during the extrusion of a billet, for example, Patent Literature 1 and Patent Literature 2 are disclosed. There is such a 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 perform sealing, and the air in the container is sucked from the exhaust hole. And how to deaerate.
In any of the above conventional deaeration devices, each of the split seal blocks moves in two directions facing each other along guides attached to the upper and lower portions of the container end surface on the extrusion stem side to open and close ( It is configured to move horizontally in both directions of the extrusion 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 on the container is placed, and also to be an obstacle when replacing the container liner.

By the way, the billet is supplied into the container of the front loading type short stroke extrusion press apparatus. The extrusion stem and the container are retracted after the extrusion is finished, and the billet is placed in the gap between the die side end surface and the die end surface of the container. This is done by moving the loader forward, moving the extrusion stem forward, pinching the billet between the end face of the extrusion stem and the end face of the die, and then moving the container forward.
The billet is fed into the extrusion press using a straight billet loader that is movable in the direction intersecting the axis of the extrusion press and movable in the horizontal direction with a billet clamper (gripping means). A billet loader is provided on either the operation side or the non-operation side of the extrusion press apparatus.

Further, the billet transfer device transfers the billet to the billet loader, and the billet transfer device is also arranged at a position parallel to the axis of the extrusion press device avoiding interference with the deaeration device.
In this case, in order to avoid interference between the billet transfer device and the deaeration device, the movement stroke of the billet loader with respect to the extrusion press device is lengthened, the equipment is enlarged, and the billet supply time is lengthened. And the enlargement of the facility will hinder pace productivity.
Furthermore, the container cylinder is attached to the main cylinder side so as not to interfere with the billet loader, and a pair is provided on both outer sides of the extrusion press so as not to interfere when the container is replaced. With such a configuration, interference between the deaeration device and the container cylinder rod cannot be avoided.

  Moreover, in this type of short stroke extrusion press, the inner diameter of the container is set larger than other types of extrusion presses in order to prevent interference between the outer diameter of the billet and the inner diameter of the container when the billet is inserted into the container. . For this reason, there has been a possibility that more air is entrained in the billet when the billet is upset.

JP-A-9-57335 JP-A-10-137840

  The present invention has been made to solve this problem, and the object thereof is to extend the movement stroke of the billet loader with respect to the extrusion press device even if a straight type billet loader that can move in the horizontal direction is used. It is an object of the present invention to provide an extrusion press apparatus for short stroke that improves the productivity of extruded products with excellent quality without hindering the arrangement space of the apparatus, and improves the space productivity by minimizing the installation space of equipment. .

In order to achieve the above object, an extrusion press apparatus for short stroke according to claim 1,
A direct billet loader is arranged between the die and the container so that the billet is loaded into the billet loading port of the container, and when the two-part seal block is closed, the seal block comes into contact with the abutment surface. The contact surface of the seal block and the outer peripheral surface of the extruded stem or the fixed dummy block can be brought into close contact with each other via the adhered seal member and the seal member provided on the inner peripheral surface of the seal block. A short stroke extrusion press apparatus provided with a seal block that can be brought into close contact with a seal side end surface of a container by pressing a seal member provided on the container side end surface, and having a pressing means that is detachable in an extruding direction. The seal block is provided so as to be openable and closable by swinging in a direction crossing the axial direction of the extrusion stem. Characterized in had condition that provided linearly movable in the transverse direction to the axial direction of the extrusion stem.

A short stroke extrusion press apparatus according to a second aspect of the present invention is the extrusion press according to the first aspect, wherein the billet loader has a billet loaded with a billet loaded in the container in a linear movement direction of the seal block. The direction is opposite to the supply direction.
The extrusion press for short stroke according to claim 3 of the present invention is the extrusion press according to claim 1 or 2, wherein the seal block has an exhaust hole for exhausting residual air in the container. Provided, and the exhaust hole communicates with a 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. Due to the configuration in which the means for opening and closing the seal block and the moving means for the seal block are provided independently, the deaeration device having the seal block can be installed on either the operation side or the non-operation side of the container. It becomes possible. For this reason, the machine width can be reduced on any one side where the deaeration device is not disposed.

The deaeration device is not arranged on the machine side that interferes with the billet transfer device, and the transfer device can be provided close to the machine side. For this reason, the moving stroke with respect to the extrusion press apparatus of the direct billet loader movable in the horizontal direction can be shortened, and the billet supply time can be shortened.
With the above configuration, the equipment of the extrusion press apparatus can be prevented from increasing in size and the equipment cost can be reduced, and the installation area of the extrusion press apparatus can be reduced to improve space productivity.
And since the slide board of the deaeration apparatus was made into the compact structure, it does not interfere with the rod of a container cylinder.

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.
And, in this type of short stroke extrusion press, when the billet is inserted into the container, the inside of the container is deaerated by utilizing the property that the billet does not contact the inner wall of the container, so that air is less mixed than the conventional product. I can expect that.

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 composed of a container holder 12, a container tire 13, and a container liner 14 is attached to a main cylinder with respect to an end platen (not shown) of the extrusion press apparatus 10 and is pushed out by a container cylinder (not shown). It is provided so that it can freely move forward and backward.
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 a horizontal billet loader having a billet gripping means 63 for loading the billet 61 in the extrusion press apparatus 10 and moving in the horizontal direction. The forward movement direction of the deaerator 30 (the center of the extrusion press) It is provided symmetrically with the axis of the extrusion press device 10 so as to move forward in opposition to the direction).

FIG. 1 shows a state in which the deaeration device 30 is moved backward to a predetermined position, and the billet loader 60 is horizontally moved to the center position of the extrusion press device 10 in order to supply the billet 61 into the container 15.
Reference numeral 17 denotes a tie bar for connecting the end platen and the main cylinder of the extrusion press apparatus 10, 18 denotes a precon tube, and 19 denotes an extrusion stem. Reference numeral 16 denotes a piston rod of the container cylinder.
In this configuration, the deaeration device 30 is provided on the stem side end surface of the container 15, and the billet loader 60 is disposed between the die side end surface of the container 15 and the die end surface so as to advance and retreat.

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 horizontally 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 face of the container 15 on the extrusion stem 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 space where the billet formed by the billet 61 and the container liner 14 is not in contact with the inner wall of the container. In the state shown in FIG. 6, an operation for moving the extrusion stem 19 in the extrusion direction, so-called upset The billet 61 is crushed by the operation, and 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.

The billet 61 is supplied between the die end surface and the die end surface of the container 15 by the billet loader 60, the billet 61 is held between the stem end surface and the die end surface by the forward movement of the stem 19, and then the billet loader 60 is moved backward. At the same time, the billet 61 is loaded into the container by moving the container 15 forward.
The sealing means 31 of the deaeration device 30 is moved forward in a state where the container 15 moves forward and the die side end surface of the container 15 is in contact with the die. Thereafter, the seal block 40 is closed, and the seal block 40 is further moved in the extruding direction to connect the deaeration space 62 and the vacuum suction device 70, and then the stem 15 is moved forward to perform upset for a predetermined time. Deaeration starts after the passage.

Completion of the deaeration operation is a predetermined time (for example, about 20 from the initial length of the billet 61 before the start of extrusion of the billet 61) after the upset is completed and the extrusion of the product started as the extrusion stem 19 advances. After about 30 mm). 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 apparatus 10 and stopped.
The extrusion press apparatus 10 continues the extrusion operation thereafter. When extrusion is completed, the extrusion stem 19 and the container 15 are 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.
As a result, the deaeration device can be arranged on one side of the extrusion press device, so that a billet transfer device for transferring the billet to the billet loader can be provided close to the extrusion press device side. Thus, the movement stroke of the billet loader to the extrusion press apparatus is shortened, the cycle time for billet supply can be shortened, and the productivity of the extrusion press apparatus is improved.
Moreover, it has the outstanding effect that facilities, such as an extrusion press apparatus and a billet loader, can be reduced in size, equipment cost can be reduced, and space productivity can be improved by minimizing the installation area of the equipment.

DESCRIPTION OF SYMBOLS 10 Extrusion press apparatus 15 Container 19 Extrusion stem 20 Fixed dummy block 30 Deaeration apparatus 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 peripheral surface of extrusion stem or fixed dummy block 57 Container Seal member on the end face on the side of the extrusion stem 58 Seal member on the contact surface of the seal block 60 Billet loader 61 Billet 70 Vacuum suction device 78 Exhaust hole 80 Retraction means

Claims (3)

A direct billet loader is arranged between the die and the container so that the billet is loaded into the billet loading port of the container, and when the two-part seal block is closed, the seal block comes into contact with the abutment surface. The contact surface of the seal block and the outer peripheral surface of the extruded stem or the fixed dummy block can be brought into close contact with each other via the adhered seal member and the seal member provided on the inner peripheral surface of the seal block. A short stroke extrusion press apparatus provided with a seal block that can be pressed and brought into close contact with a stem side end surface of a container and a pressing means that is detachably movable in an extrusion 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 device for short stroke. 2. The short stroke extrusion press apparatus 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 loaded in the container is placed. The short stroke extrusion press apparatus 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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