JP3011329B2 - Extrusion molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruder for extruding an aluminum alloy or the like by using an extrusion press to degas air between the container and the billet before the billet is extruded from the container through a die. The present invention relates to an improved extruder for extruding a billet effectively and efficiently without containing air.

[0002]

2. Description of the Related Art After a billet having a diameter slightly smaller than the inside diameter of a container is placed in the container, the billet is pressed against a die with a rearward extrusion stem in the container. Air is compressed. In order to release the compressed air, the extrusion stem and the container are slightly retracted, the compressed air is extracted from the gap between the die and the container, and the container and the extrusion stem are advanced again to start extrusion. The degassing process of removing the compressed air in this way is called a burp cycle.
Waste time is generated in the extrusion cycle.

According to this method, when a container is pressed against a die by evacuating in a burp cycle, air remains at atmospheric pressure in a thin state of about one skin between the inner surface of the container and the outer surface of the billet. And sufficient degassing has not been performed.

Therefore, in order to easily and surely remove the residual air when extruding a billet, an airtight chamber is provided by a metal bellows between a container and an extrusion stem as described in Japanese Patent Publication No. 48-25315, for example. One end is sealed with a metal packing between the container and the other end with the extrusion stem, and the metal packing is pressed with a cylinder from outside using pneumatic or hydraulic pressure, and the air in the airtight chamber is discharged to the outside. Some are designed to eliminate residual air.

In Japanese Patent Application Laid-Open No. 52-47556, a disc-shaped support plate is provided at an appropriate position of an extrusion stem by using a carbon seal, and elasticity is provided by a spring provided between the rear wall surface of the container and the support plate. A method is described in which the inside of the container is suctioned and deaerated from between the dummy block and the inner peripheral wall surface of the container while sealing the inside of the container with a sealing material via a support that is in contact with the airtight relationship.

Further, Japanese Utility Model Publication No. 55-19605 discloses that a seal block is provided so as to be openable and closable in a direction perpendicular to the axial direction of the container, and when the seal block is closed, the inner surface of the seal block is formed with an extrusion stem. An arrangement which can be brought into close contact with the outer surface is described.

Such a two-part seal block opens and closes along a guide plate fixed to the upper and lower portions of the container end face on the extrusion stem side, and further seals the space between the extrusion stem and the container. Seal packing is provided between the cover plate and the seal block and between the extrusion stem and the inner surface of the seal block, and a deaeration groove 12 is provided on the inner surface of the container 1 on the upper side of the extrusion stem 3. And easy to degas.

Japanese Patent Application Laid-Open No. Hei 5-245533 discloses that a rim abutting on an end face of an extruding stem of a container and an edge portion which can slide back and forth with the extruding stem are hermetically sealed. A telescope-type elastic member is provided for pressing and holding the sealed container on the extruding stem side end surface of the container over the stroke. The telescope type is extended and the rim is brought into contact with the container end surface to seal the container. I have come to mind.

[0009]

However, the above-mentioned Japanese Patent Publication No. 48-25315 and Japanese Patent Application Laid-Open No. 52-47556.
And Japanese Patent Application Laid-Open No. 5-245533 have the following problems. In other words, a flexible sealing device such as a metal bellows, a spring, and a telescope-type elastic member that can extend and contract from the extrusion stem side toward the rear end surface of the container to completely remove residual air in the container when the billet is extruded. In addition, the deaeration space is expanded and deaeration time is required. In addition, the degree of vacuum is low due to insufficient sealing due to insufficient sealing.

When the billet is loaded in the container, the sealing device is once retracted to the ram side (the base of the extrusion stem), and after the extrusion stem is advanced, the billet is completely loaded into the container and the sealing device is advanced to seal the billet. Since the air in the container is vacuum-evacuated, the idle time becomes longer by the operating time of the sealing device.

In order to extend and seal the flexible sealing device from the retracted position of the base of the extrusion stem to the container end surface, the front portion of the sealing device is bent by its own weight, and a gap is formed between the container end surface and the sealing device. Tends to be insufficient.

In order to press the seal device from the ram side toward the container side so that the seal device sufficiently contacts the container end face, a large pressing force is required, which complicates the structure.

Under retracted conditions in the retracted position when the flexible sealing device is not used, the length of a conventional extrusion stem (conventionally required a sufficient length to extrude a billet loaded in a container) As a result, the length of the extruding press becomes longer by the shrinkage dimension of the sealing device, and as a result, the installation area becomes larger.

In JP-A-52-47556 and JP-A-5-245533, since the seal device and the extrusion stem are in relative contact with the extrusion stem in a state where they are always in contact, the The sliding surface of the extrusion stem and the sealing material are liable to wear, and the life of these sliding members is short.

In the case of (1), if the sealing device bends due to its own weight, the sealing device is more likely to hit against the extrusion stem, so that the life of the sliding member is more likely to be shortened.

In addition, the apparatus disclosed in Japanese Utility Model Publication No. 55-19605 has the following problems. That is, the split seal block is opened and closed along a guide plate provided on the end face of the container. When the seal block is opened and closed, the seal packing interposed between the seal block and the guide plate receives heat from the container side. In addition to being exposed to a high temperature (for example, 300 ° C. or more) due to the retained heat of the air heated while staying in the container, the seal gasket is constantly rubbed between the guide plates, so that the seal packing is significantly deteriorated and the life of the seal material is extended. There is a problem such as short.

[0017] Further, when the extrusion stem that has completed the billet extrusion returns to the original position before the billet extrusion, the aluminum residue attached to the inner peripheral surface of the container liner is fixed by the fix dummy block provided at the tip of the extrusion stem. Since the aluminum powder scrapes off the outer peripheral surface of the dummy block and falls into the grooves of the guide plate, the opening and closing of the seal block becomes insufficient, resulting in poor sealing performance. The inside of the container, the so-called inner surface of the container liner, is provided with a deaeration groove on the upper side of the extrusion stem, so if you try to use such a container for another purpose, the use will be restricted and it will be used as a general-purpose machine It cannot be performed, and must be replaced one by one with the inner surface of the container liner having no deaeration groove, and a great amount of replacement time is required for such replacement of the container liner. A large external force acts on the container liner when the billet is upset.However, since the degassing groove is cut, concentrated stress acts on the cut portion of the degassing groove, and the mechanical strength decreases. is there.

The present invention has been made in view of the above problems, and an object of the present invention is to remove all air in a container before performing container sealing and extruding billets in the container. It provides an extrusion cycle that does not require the degassing step called a burp cycle before extruding a billet from a die, and also extrudes the mold by mixing residual air and impurities that could not be obtained by degassing the outer skin of the billet. An object of the present invention is to provide an extrusion molding apparatus in which the quality or yield of a material is not reduced.

[0019]

In order to achieve the above object, according to a first aspect of the present invention, there is provided a ring-shaped projection provided on an end face of a container having a container liner in which a billet is loaded, on an extrusion stem side. A pair of split ring-shaped seal block rotating bases which can be opened and closed in a direction intersecting with the axial direction of the pushing stem above the container end surface on the pushing stem side, and one end of a swing arm fixed to the rotating base. And an outer peripheral surface of the ring-shaped projection portion, which is fixed through a split ring-shaped seal block fixed to the other end and a seal member attached to the seal block contact surface when the seal block is closed. A cooling device that cools the seal member is provided in the seal block while being able to be brought into close contact with the outer peripheral surface of the dummy block or the extrusion stem at the same time. In addition, the second invention mainly based on the first invention
In the invention, the gears meshed with each other are arranged on the rotating base, and the distal end of the telescopic piston rod engaged with the cylinder is fixed to the side end of one swing arm,
The pair of swing arms can be simultaneously opened and closed with the expansion and contraction of the piston rod. In the third invention mainly based on the first invention, a deaeration groove is provided on the inner surface of the ring-shaped projection on the side of the extrusion stem. . Further, the fourth invention mainly based on the third invention.
According to the fifth aspect of the present invention, the inner diameter of the deaeration groove is substantially circular, which is larger than the outer diameter of the fixation dam block attached to the tip of the extrusion stem. A vacuum deaeration hole for removing the residual air inside was provided, and connected to a vacuum pump via a pipe. In the sixth aspect of the invention, which is mainly based on the first aspect, a gas outlet that blows a cooling medium toward the seal member and blows off extraneous matter such as dust and the like at the same time inside the ring-shaped seal block. In the seventh aspect of the invention, which is mainly based on the first aspect, a ring-shaped seal block is provided inside the seal block, the inner seal block having the seal member, and an outer seal block. And an outer seal block that holds the inner seal block and that is divided into an outer seal block. The inner seal block has a radially arranged first cooling medium passage surrounded by a lid and The second cooling medium passage is provided between the outer seal block and the outer seal block that holds the block.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS When a billet in a container is pushed in by an extrusion stem behind the billet and the billet is pressed against a die, the billet is crushed and the air between the container and the billet is compressed. This compressed air must be evacuated from both sides of the container before the billet is extruded from the die. In addition, the billet in the container must be pushed in by the extrusion stem behind the billet, and the gas must be suctioned and deaerated from both sides or one side of the container just before pressing the tip of the billet against the die. In the present invention, since the air in the container is forcibly vacuum-evacuated on the extruding stem side of the billet before the billet is compressed by the extruding stem, the process for discharging the compressed air after the billet is compressed by the extruding stem is performed. The so-called degassing step can be omitted.

In the present invention, when air is sucked from the extrusion stem side of the container, a ring-shaped projection is disposed on the end face of the container on the extrusion stem side before the billet is compressed between the extrusion stem and the die. At the same time, a rotating base of a split seal block is disposed on the upper end surface of the container on the side of the extrusion stem, and is fixed to the leading end via a swing arm from the rotating base so that it can be opened and closed in the axial direction of the container. While sealing with the split seal block, the air in the container is vacuum-evacuated, and the ring-shaped protrusion has a diameter larger than that of the fix dam block so that the air in the container can be evacuated smoothly. When the billet is loaded into the container by the extrusion stem, the inner surface of the ring-shaped protrusion and the fixed dummy are provided. Since the resulting annular gap between the outer peripheral surface of the block, since the air between the container and the billet is easily degassed outside the container, the product yield by preventing the generation of blisters is significantly improved.

Further, a cooling medium passage is provided in the ring-shaped seal block to cool the ring-shaped seal block body while the cooling medium is circulating, and is provided inside the ring-shaped seal block toward the seal member. At the same time that the cooling medium is blown out and the gas outlet that blows off foreign substances such as dust and dust is opened, the cooling medium is continuously blown from the gas outlet toward the seal member during opening and closing of the seal ring. As the seal member is cooled down, the life of the seal member increases, and the aluminum dust adhered to the inner peripheral surface of the seal block and the outer peripheral surface of the extrusion stem due to the gas blown from the gas outlet even while closing the split seal ring. Adhesives, such as dirt and dust, that degrade the sealing performance can be blown off and removed, increasing the sealing performance and vacuum degassing with a higher degree of vacuum. It can become.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an extrusion molding apparatus according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system diagram of a preferred apparatus according to the present invention, FIG. 2 is a front view as viewed from A to A in FIG. 1, FIG. 3 is a plan view as viewed from BB in FIG. 2, and FIG. FIG. 5 is an enlarged partial cross-sectional view of a main part of the seal block, FIG. 6 is a plan view seen from DD of FIG. 4, and FIG. 7 is FIG.
8 is a cross-sectional view as viewed from C to C, FIG. 8 is an enlarged cross-sectional view of an essential part of the sealant cooling device attached to the seal flock,
FIG. 10 is a comparison diagram of a case where a sealing material is stuck to the contact surfaces of the split seal blocks, FIG. 10 is an explanatory diagram showing a scraping state of aluminum residue adhered to the inner peripheral surface of the container liner, FIG.
1 is a front view of a billet loader, FIG. 12 is an enlarged sectional view of a projection, FIG. 13 is an enlarged sectional view showing various shapes of an inner surface of the projection, and FIG. 14 is an explanatory view for explaining a mounting structure of a heat insulating seal block. 15 to 16 are operation diagrams showing the state of spraying the cooling medium at the same time as the closing operation of the seal block, and FIG. 17 is an explanatory diagram showing the state of the billet loaded in the container being pressed and extruded.

As shown in FIG. 1, a container cylinder 33 for sliding the container 1 composed of the container liner 1a, the container tire 2 and the connate holder 1c is disposed on the end platen 32 side. Reference numeral 36 denotes a cylinder tube constituting a part of the cylinder body, 37 denotes a piston, and 38 denotes a piston rod.

Reference numeral 3 denotes a die, and the outer periphery of the die 3 is slidably fitted and held on the inner peripheral surface of the die ring 5. Reference numeral 31 denotes a gap between the inner peripheral surface of the container and the outer peripheral surface of the billet 13, which is also a degassing space.

On the other hand, the extrusion stem 1 for pushing the billet 13
4 is provided with a fixed dam block 70 that can be in close contact with the inner surface of the container 1.

In this embodiment, a vacuum suction device 60 for sucking and removing residual air in the degassing space 31 will be described.

First, a vacuum suction device 60 for removing air from the extrusion stem 14 side in the container 1 is shown in FIGS.
As shown in the figure, it is disposed on the end face of the container 1 on the extrusion stem 14 side. As shown in FIGS. 4 and 6, a pair of bearings 61 (61a, 61a) are provided on the upper surface of the container 1 on the extrusion stem 14 side.
b) and 62 (62a, 62b) are provided to rotatably support the swing arm rotating shafts 63 (63R, 63L), respectively.
L is attached to S in a state where spur gears 65R and 65L mesh with each other. The bearing 61a and the bearing 62a
The rotation bases 66 (66R, 66L) are attached to the swing arm rotation shafts 63R, 63L protruding toward the extrusion stem 14 from, for example, set screws.

Each of the pivot bases 66R and 66L has a frame-shaped swing arm 64R having a pair of inner and outer sides.
An annular split seal block 40 (40R, 40R) having a donut-shaped front face is attached to one end of the swing arm 64L and the other end of the swing arm 64R, 64L.
L) is fixed. A connecting member 67 is fixed to the middle part of the swing arm 64R, and an upright cylinder 43 is provided on the upper part of the container 1, and a piston rod 43a is provided in the cylinder 43 so as to be vertically movable. A clevis 43b is fixed to the tip.
A connecting member 44 is rotatably connected between the connecting member 67 and the clevis 43b.

A seal block 4 is provided on the side of the cylinder 43.
A first limit switch 72, a second limit switch 73, and a third limit switch 74 for detecting an open / close operation position between the retreat limit position (open state) and the forward limit position (closed state) of 0R and 40L are respectively provided. is there. The first limit switch 72 detects a retreat limit position (open state) of the seal blocks 40R and 40L.
The second limit switch 73 is a seal block 40R,
0L is provided to detect that it temporarily stops at a predetermined position close to the extrusion stem 14. The third limit switch 74 is connected to the seal block 4
In the position where 0R and 40L are closed with respect to the extrusion stem 14, the state becomes 0N, the electromagnetic switching valve 90 for deaeration is excited, the deaeration space 31 and the vacuum tank 20 are connected, and the container 1
The air inside is evacuated.

Further, as will be described later, an inner seal block 40A having two seal blocks 40 (40R, 40L) positioned inside the seal block 40 and having seal packings 41, 44 inside, and the inner seal block 40A, The inner seal block 40 is located outside the seal block 40A.
A is divided into an outer seal block 40B that holds A, and when the seal blocks 40R and 40L are closed as shown by a chain line in FIG.
A seal packing 46 (sheet-like sealing material) for preventing air from entering from the contact surfaces 40A between the 40Ls is attached to the contact surfaces between the inner seal blocks 40A.

The seal packing 46 is desirably made of, for example, a sponge-like sealing material having heat resistance and elasticity.
A material such as a silicone rubber sponge sheet or a fluoro rubber sponge sheet is preferable.

Further, when the seal blocks 40R and 40L are closed, the contact surface 40 of the inner seal block 40A is closed.
The seal packings 46 adhered to each other and the protrusions 80 to be described later via the seal packings 41 provided on the inner peripheral surfaces of the seal blocks 40R and 40L, and the fixed dummy block 70 and the extrusions via the seal packings 44. The outer peripheral surface of the stem 14 is brought into close contact with each other.

Such seal packings 41, 44, 4
Of 6, the material of the seal packings 41 and 44 is preferably a heat-resistant and highly-deformable material such as string-like silicone rubber or string-like fluorine rubber. On the other hand, the seal packing 46 is preferably made of a sponge-like soft rubber, for example, a heat-resistant sponge-like material such as a silicone rubber sponge sheet or a fluoro rubber sponge sheet, as compared with the seal packings 41 and 44.

In particular, as shown in FIG. 9, when closing the split seal blocks 40R and 40L with respect to the fixed dummy block 70 and the extruding stem 14, the outer peripheral surfaces of the fixed dummy block 70 and the extruding stem 14 and the seal packing are formed. As shown in FIG.
As shown in (b), a gap S is generated at the end of the contact surface 40A by being pulled in the direction of the arrow.

For this reason, as shown in FIG. 9A, a sponge-like soft rubber (each having a thickness of 3 mm) is provided on the seal packing 46 on the contact surface 40A of the two seal blocks 40R and 40L.
Is adhered, the seal packing 46 is compressed by closing the seal blocks 40R and 40L, so that the free end of the compressed seal packing 46 protrudes toward the fixed dam block 70 and the extrusion stem 14 side. Thus, the generation of the gap S as described above is prevented. This has the same effect for the seal packing 41 as well. Even when the seal packing 41 is in close contact with the outer peripheral surface of the projection 80 described later, the gap S
Is prevented from occurring.

As shown by a solid line in FIG.
When R and 40L are retracted to the retreat limit, the first billet loader 111 described later can enter and exit with the billet 13 placed thereon.

A part of each of the seal blocks 40R and 40L is provided with a deaeration hole 45, and a flexible pipe 8a is formed in the deaeration hole 45.
One end is connected, and the other end is provided with a fixed pipe 8 b via an electromagnetic switching valve 90, and is connected to the vacuum tank 20.

As shown in FIGS. 7 and 12, the container 1
The outer peripheral surface of the container liner 1a at the end surface of the extrusion stem 14 side is spliced to form a concave portion 50 concentric with the container liner 1a in the container tire 2 and a donut-shaped heat insulating material indicated by reference numeral 47 is fitted therein. I have. On this heat insulating material 47, a fitting member 51 having a projection 80 projecting in an L-shape in cross section toward the extrusion stem 14 side is mounted by a bolt 52 arranged at a constant pitch.

Reference numeral 56 denotes a ring-shaped projection, and the heat insulating material 47 is made of a relatively soft material.
The fitting member 51 has a role of a stopper so as not to be compressed and deformed when the fitting member 51 is mounted on the extruding stem 14 side end surface of the container tire 2 by the bolt 52 after the fitting member 51 is disposed on the heat insulating material 47. Further, the heat insulating material 47 is the container 1
It also has a function as a sealing material for preventing the intrusion of air from the outside when vacuuming the inside air.

A heat insulating pressing plate 48 is provided at the outermost part of the container tire 2 and is mounted by screws 54 from the outside at a pitch circle position out of phase with the bolt 52 described above. Further, a heat insulating ring 53 is fitted on the outer peripheral surface of the projection 80. Thus, the heat insulating material 47, the fitting member 51, and the
The heat-insulating holding plate 48 is overlapped with the fitting member 51.
By attaching the heat insulating ring 53 to the outer peripheral surface of the projection 80, the temperature of the outer peripheral surface of the heat insulating ring 53 is about 200 ° C. or less, and the average temperature of the container 1 is generally about 40 ° C.
The temperature is much lower than 0 ° C. For this reason, even if the seal packing 41 contacts the heat insulating ring 53 frequently with the opening and closing of the split seal block 40, the seal history 41 is prevented from deteriorating due to the heat history, and from the container 1 side. Part of the heat is prevented from being transmitted to the vacuum suction device 60 by heat conduction.
0L is disposed so as to be able to move back and forth between the retreat limit position and the forward limit position without sliding on the surface of the heat insulating holding plate 48 disposed above the heat insulating material 47. In addition, as a material of the heat insulating material 47, for example, a silica-based material having a microporous structure is preferable.
As the heat insulating seal block 55, for example, tool steel or heat-resistant steel is used. As the heat insulating holding plate 48 and the heat insulating ring 53, for example, a high-performance resin is suitable.

In particular, as shown in FIG. 14 (2), the end face side of the extrusion stem 14 of the container 1 of the extrusion press device for a general-purpose machine shown in FIG. Then, the end face of the container 2 protrudes toward the extrusion stem 14 side, and NO. In order to avoid such interference, for example, the length of the extrusion stem 14 is increased, or the first billet loader 111 itself is moved to the extrusion stem 14 side. The first billet loader 111 must be significantly modified.

Further, if the heat insulating seal block 55 is entirely covered with the heat insulating seal block 55, not only the manufacturing cost is increased, but also many bolts must be opened to attach the heat insulating seal block 55 to the end face of the container tire 1a. (1) There is a problem in strength.

In this embodiment, as shown in FIG. 14 (3), instead of simply covering the entire end face of the container 2 with the heat-insulating seal block 55, a donut-shaped recess 50 is provided in the container tire 1a. When the heat-insulating seal block 55 is mounted, the protrusion length of the protrusion 80 of the heat-insulating holding plate 48 may be short, and the NO may be short enough not to interfere with the protrusion 80 of the fitting member 51 constituting the heat-insulating seal block 55. . The billet liner 111c of the two billet loader 111b is exchanged. In addition,
In this embodiment, as described above, the billet liner 1
The present invention is not limited to exchanging the billet liner 111c which has been modified so that the end face of the projection 11c does not interfere with the projection 80. For example, the billet loader 111 is disposed at a position where it does not interfere with the projection 80 when a new extrusion press is provided. It may be provided.

In this embodiment, when returning to the container 1 of the extrusion press device for a general-purpose machine as shown in FIG.
This can be achieved by appropriately attaching the recovery block 56 as shown in FIG. 4 (4) and FIG. 14 (5) with bolts or the like (not shown).

The inner diameter Y of the projection 80 provided on the heat insulating holding plate 48 is larger than the inner diameter X of the container liner 1a as shown in FIG. 12 (Y> X).
This is because the aluminum cake adheres to the enlarged diameter portion 49 of the fixed dam block 70 at the time of extrusion and the enlarged diameter portion 4
9, the inner diameter of the container liner 1a becomes the same as the inner diameter X of the container liner 1a.
Since the annular gap between them is formed, the air in the container 1 can be easily deaerated. Further, when the billet 13 is pushed into the container 1 by the pushing stem 14, the pushing can be easily performed. For this reason, the projecting portion 80 is further provided on the end surface of the pushing portion 80 on the pushing stem 14 side.
0, while the billet 13 is easily pushed into the container 1 from the end face of the extrusion stem 14 so that the enlarged diameter portion 49 of the tip of the fixed dam block 70 of the extrusion stem 14 can pass through the inner diameter of the projection 80 smoothly. It has a tapered shape. Further, the protrusion 80 of the container liner 1a
The side end surface is also provided with a taper having an enlarged diameter, and is connected to the inner surface of the projection 80 following the tapered end.

When the enlarged diameter portion 49 of the fixed dam block 70 passes through the inner diameter of the projection 80, an annular gap is formed between the enlarged diameter portion 49 of the circular tip and the inner diameter of the circular projection 80. However, without being limited to this, FIG.
As shown in (3), the protrusion 80a is partially provided on the inner diameter of the protrusion 80, so that a gap having an intermittent ring may be formed between the extrusion stems 14, or another gap may be formed. You may. As described above, on the extrusion stem 14 side of the fitting member 51, a projection 80 having a circular front is disposed at a position corresponding to the container liner 1a, and the heat insulating ring 53 fitted on the outer peripheral surface of the projection 80 is provided. When the seal blocks 40R and 40L are closed, they are sealed via the seal packing 41. Reference numeral 21 is a vacuum pump, and 22 is a motor.

Further, a major feature of the present invention is that when the two-part seal blocks 40R and 40L are opened and closed, there is no cover plate or guide rail, and when the seal blocks 40R and 40L are opened, the first seal block 40R or 40L is opened. The rotation base 66 (66) does not interfere with the one billet loader 111.
R, 66L).

Therefore, not only can the container tire 2 and the container liner 1a be easily exchanged, but also, as shown in FIG. 10, the extrusion stem 14 which has completed the extrusion of the billet 13 is returned to its original position before the extrusion of the billet 13. The fix dummy block 7 provided at the tip of the extrusion stem 14 when returning.
However, even if aluminum dust adhered to the inner peripheral surface of the container liner 1a is scraped off by the outer peripheral surface of the fixed dam block 70, the peeled aluminum dust simply falls down from the tip of the inner peripheral surface of the projection 80. Unlike the conventional case, the seal block 70 does not fall into the groove of the guide plate and the opening / closing of the seal block 70 becomes insufficient, so that the sealing performance does not deteriorate.

Next, in this embodiment, the seal packing 41,
A cooling device 91 mainly for spraying a cooling medium toward a seal member such as 44 is provided. The two seal blocks 40 (40R, 40L) are located inside the seal block 40 and the seal packing 4
An inner seal block 40A having an inner seal block 40A and an outer seal block 40 located outside the inner seal block 40A and holding the inner seal block 40A;
B and the outer seal block 40
B is attached to the inner seal block 40A by holding bolts 95 arranged at appropriate pitch intervals from the outside of B.

As shown in FIGS. 7 and 8, a semicircular groove is formed in the inner seal block 40A.
The first cooling medium passage 96 is provided by mounting the first cooling medium passage 8. The first cooling medium passage 96 has a plurality of radially arranged slit shapes, and the tip of the first cooling medium passage 96 is blown from a first gas outlet 100 opened to the side of the seal packing 44. The seal packing 44 is appropriately cooled by the supplied cooling medium.

A plurality of second cooling medium passages 97 communicating with the first cooling medium passage 96 are formed between the inner seal block 40A and the outer seal block 40B so as to face the first cooling medium passage 96. . The cooling medium introduced into the second cooling medium passage 97 appropriately cools the seal packing 41 with the cooling medium blown out from the second gas outlet 101 opened to the side of the seal packing 41. . In the present embodiment, the first cooling medium passage 96 and the second cooling medium passage 97 are configured to communicate with each other. However, the present invention is not limited to this, and the first cooling medium passage 96 and the second cooling medium passage 97 communicate with each other. It may be provided independently without any.

One end of a flexible pipe 92 is connected to the outer seal block 40B, and the other end is provided with a fixed pipe 94 via an electromagnetic switching valve 93. The fixed pipe 94 is connected to a cooling medium supply source (not shown). is there. First gas outlet 100 of inner seal block 40A and outer seal block 40
From the second gas outlet 101 of B, the seal block 40
The cooling gas is always blown out without being limited to the retreat limit position where L and 40R are opened or the forward limit position where L and 40R are closed.

Next, the billet loader 111 will be described with reference to FIGS. In FIG. 2, a first billet loader 111 and a second billet loader 140 are provided. As shown in FIG. 3, the second billet loader 140 includes a telescopic cylinder 145, a moving frame 146, a linear guide 147, a holding portion 154, a billet loader swing arm 149, a tilt stopper 150, and a stopper 151 for restricting the tilt stopper from retreating. 152) and a fixed frame 153.

As shown by the broken line in FIG. 2, the second billet loader 140 receives the billet 13 transported by the billet carrier 141 at the time when the second billet loader 140 advances, and moves the first billet loader 111 at the retreat limit position. This is for transferring to the first billet loader 111 provided on the side of the container 1 by tilting to the same position as the lower limit position. That is, the billet carrier 141 has an inclined table 142 installed near the base surface of the molding machine, and a delivery holder 143 that bridges to the second billet loader 140 via the inclined table 142 is attached.

The delivery holder 143 has a V-shaped billet receiving portion, and is attached to the support shaft 144 so that the receiving portion can be turned. Then, it can be driven to swing by a cylinder mechanism (not shown), receives the billet 13 first with the V-shaped receiving portion opening directed to the upstream side of the inclined table 142, and further turns to the downstream side to rotate the second billet loader 140. The billet is driven so as to be sent to the billet holder 154. The second billet loader 140 is arranged to face the billet carrier 141 such that the billets 13 are supplied one by one to the second billet loader 140 by such a billet carrier 141.

A telescopic cylinder 1 having an extendable rod 145a at one end of the fixed frame 153 in the axial direction.
45 is provided, and the distal end of the rod 145a is connected to a moving frame 146 via a connecting member 157. Linear guides 147 are provided on both sides of the fixed frame 153 in the longitudinal direction, and the moving frame 146 can move forward and backward along the linear guides 147.

A pair of rod-shaped movable frame stoppers 1 for restricting retraction of the movable frame mounted above one end 155 of the fixed frame 153.
Reference numeral 51 denotes a member for restricting the retreat limit of the moving frame 146. The structure is such that by rotating the adjusting screw 156, the stopper 151 for restricting the moving frame retreat is moved back and forth to determine the retreat position of the moving frame 146. On the other hand, a pair of rod-shaped tilting stopper retraction regulating stoppers 152 attached to the lower side of one end side 155 of the fixed frame 153 are located at the lower rear portion of the moving frame 146 at the retreat limit position of the moving frame 146, and have adjustment screws 158. Is rotated to move the tilt stopper retraction regulating stopper 152 back and forth to determine the retreat position of the tilt stopper 150, whereby the rear end of the billet loader swing arm 149 abuts the tilt stopper 150, The billet 13 placed on the billet holding portion 154 at the tip of the billet loader swing arm 149 around the rotation support shaft 160 can be tilted and raised to the intermediate stop standby position.

Next, the first billet loader 111 will be described. The first billet loader 111 receives the billet 13 as a forming base material transported to the intermediate stop position by the second billet loader 140, and transports and supplies it to the billet loading port 126. The first billet loader 111 has a fixed frame 161 protruding toward the extrusion stem 14 of the container 1 attached thereto. The first billet loader 111 can move integrally with the container 1 on the side end surface of the container 1 as shown in FIG. The fixed No. 1 billet loader 111a and the No. 1 billet loader. It comprises a two billet loader 111b.

The first billet loader 111 is tiltable adjacent to the container 1 side. 2 billet loader 111b
And No. No. 1 that can tilt freely adjacent to the first billet loader 111b. It comprises one billet loader 111a. The first billet loader 111 is disposed to face the second billet loader 140, and is capable of turning along a plane orthogonal to the extrusion center line of the molding machine. The first swing arm 162 of the first billet loader 111a and the No. 1 2
A second swing arm (not shown) of the billet loader 111b is provided.

That is, to explain the swing arm 162 as a representative, one end of the swing arm 162 is pivotally attached to a turning center portion 163 arranged on the upper side inside the lower tie rod 129. An upper limit stopper 164 is provided at an upper end of the fixed frame 161, and a lowering stopper 65 is provided at a lower end of the fixed frame 161. The first billet loader 111 is opposed to the second billet loader 140 by the lowering stopper 165. In this state, the lowering limit of the first billet loader 111 is regulated so that the billet 13 can be easily delivered.

On the other hand, when the billet 13 received from the second billet loader 140 by the first billet loader 111 is conveyed to the billet loading port 126 via the intermediate stop standby position by the first billet loader 111, the rise regulating stopper 164 is placed on the first billet loader 111. The upper limit of the first billet loader 111 is regulated so that the billet 13 can be easily loaded into the billet loading port 126. No. 1 billet loader 1
The first swing arm 162 of 11a is connected to the piston rod 166a of the first hydraulic drive cylinder device 166,
The first swing arm 162 is driven between the lower limit position shown by the broken line in FIG. 2 and the upper limit position shown by the solid line by the expansion and contraction operation of the piston rod 166a. In addition,
Reference numeral 167 denotes a second hydraulic drive cylinder device 167,
No. The two billet loader 111b is connected to a first swing arm via a piston rod 167a.

A first billet holding portion 168 for holding the billet 13 is attached to the tip of the first swing arm 162. The first billet holding portion 168 has three pedestals 169 for supporting the lower surface of the billet 13, so that the supported billet 13 is stably held. One end of the first billet holding portion 168 attached to the tip of the first swing arm 162 has a support shaft 170.
Is provided. On the other hand, the connecting member 172 fixed at a fixed angle to the lower end of the clamp arm 171 is attached to the clamp arm 171.
Is connected to the tip of a rod of an auxiliary cylinder 173 that clamps or releases the billet 13 so that the clamp arm 171 is swung by the expansion and contraction of the rod. Therefore, in the first billet holding portion 168, the billet 13 is held at least at three points by the pedestal 169 and the clamp arm 171 to prevent the billet 13 from dropping during transfer.

The structure of the extruding stem 14 side is such that the fixed dammy block 70 and the extruding stem 14 are bayonet-coupled via the bayonet block 72, and the fixed dammy block 70 and the extruding stem 14 are directly connected. , May be screwed together.

In this embodiment, the fixed dummy block 7
A detailed description will be given of a structure in which the extruding stem 14 and the extruding stem 14 are connected by bayonet.

The fixed dam block 70 is fixedly provided on the front surface of the extrusion stem 14 and has a container liner 1a.
It is slidably provided inside. The rear end of the extrusion stem 14 is fixed to a crosshead 75 via a stem holder 73 and a pressure ring 74 as shown in FIG.

A bayonet block 72 is provided on the front surface of the extrusion stem 14, and a rear end portion inside the bayonet block 72 is provided at the tip of a connection rod 76 having a circular outer diameter section. Screwed to the screw.
The rear end of the connection rod 76 is a large-diameter portion 76a, and is engaged and fixed with a tapered surface in a hole at the rear end of the extrusion stem 14.

Next, the operation of the above device will be described.

FIG. 15A shows one of the seal blocks 40R of the opened seal block 40 as a representative, and shows the first gas outlet 100 and the second gas outlet 101 provided in the inner seal block 40A. The cooling gas medium is constantly blown out from both sides toward the seal packing 44 and the seal packing 41, respectively. When the seal block 40 is closed, the seal packing 44 and the seal packing 41 are attached to the outer circumference of the fixed dam block 70 and the outer circumference of the heat insulating ring 53. The heat transferred by heat conduction from the container 1 side when they come into contact with each other is applied to the seal packing 44 and the seal packing 4.
This prevents the seal packing 44 and the seal packing 41 from receiving a heat history and shortening the replacement time.

When pressurized oil is supplied to the cylinder 43 from this state, the seal block is blown out from both the first gas outlet 100 and the second gas outlet 101 toward the seal packing 44 and the seal packing 41, respectively. Move forward 40R and 40L. Seal block 40R
As the (40L) advances in the direction approaching from the direction away from the extrusion stem 14 and the fixed dam block 70, the first gas outlet 100 and the second gas outlet 1
Adiabatic holding plate 4 by cooling gas medium blown from
8 and the outer peripheral surface of the heat insulating ring 53 to cool off the attached dust and dirt (FIG. 15 (2)).

When the seal block 40R (40L) is closer to the extrusion stem 14 and the fixed dummy block 70, the first gas outlet 100 and the second gas outlet 1
Due to the pressure of the cooling gas medium blown out from the cooling medium 01, the outer peripheral surfaces of the heat insulating holding plate 48 and the heat insulating ring 53 are cooled, and the attached dust and dust are blown off more and more (FIG. 16).
(1)).

Even after the seal block 40R (40L) comes into contact with the fixed dummy block 70 and the heat insulating ring 53, the first gas outlet 100 and the second gas outlet 10
The cooling gas medium is blown out from 1, and the blown out cooling gas medium is blocked by the seal packing 41 and the seal packing 44 so as not to communicate with the degassing space 31, and is discharged outward as shown in the figure. Only (FIG. 16 (2)).

Next, a state where the billet 13 is crushed will be described with reference to FIG. As shown in FIG. 17, first, pressure oil is supplied to the rod side of the container cylinder 33 and the piston 3
7 is moved to the left, the container 1 that is separated from the die 3 is advanced, and the die 3 is brought into contact with the container 1.

Next, the first billet loader 111
By retracting the piston rods 166a and 167a of the hydraulic drive cylinder device 166 and the second hydraulic drive cylinder device 167, respectively, the first swing arm 16
The billet 13 is raised so that the billet 13 is held in the first billet holding portion 168 and the second billet holding portion (not shown) so that the billet 13 can be loaded into the billet loading port 126.

The split seal blocks 40R and 40L are stopped at the retreat limit position while the first limit switch 72 is being kicked, and the billet loader 111 is moved from this state.
The extruding stem 14 is raised with the billet 13 placed thereon.
At the same time, the split seal blocks 40R, 40L are started to advance (FIG. 17 (1)),
At a predetermined position close to the extrusion stem 14 from the radial direction, the second
The limit switch 73 is kicked and temporarily stopped. on the other hand,
The tip of the billet 13 is gradually pushed into the container 1 by the advance of the extrusion stem 14. And N on the way
o. 1 billet loader 111a and no. The two billet loaders 111b are sequentially divided into two seal blocks 40R,
It descends to a position where it does not interfere with 0L (FIG. 17 (2)).
At this time, the push-out stem 14 continues to advance, and when it reaches a predetermined position by a rotary encoder (not shown), the advance speed is reduced.

When the forward speed of the pushing stem 14 is reduced, a solenoid valve (not shown) disposed on the hydraulic oil introducing pipe of the cylinder 43 is excited, and the two-piece seal blocks 40R, 40
L advances again at the speed described above, and finally stops at the forward limit position. At this time, the extrusion stem 14 holds the billet 13 in FIG.
It is pushed in by a predetermined length shown in FIG. 7 (3). When the halved seal blocks 40R and 40L reach the forward limit position, the third limit switch 74 is kicked to activate the vacuum suction device 60 and to excite the electromagnetic switching valve 90, so that the container 1
Vacuum suction is performed in a state in which the deaeration space 31 between the die 3 and the billet 13 and the vacuum suction device 60 are connected (FIG. 17 (3)).

The sealed air in the deaeration space 31 passes through a deaeration hole 45 provided in a part of the halved seal block 40.
It is sucked and discharged from the electromagnetic switching valve 90 on the pipe 8a to the vacuum tank 20 via the pipe 8b. Thus, the gas is quickly and sufficiently degassed from the degassing hole 45 of the seal block 40.

The inside of the vacuum tank 20 has already been
Is in a vacuum state of, for example, 0 to 5 Torr. First,
As the extrusion stem 14 advances, the billet 13 becomes the container 1
However, at the time of the pushing, the enlarged diameter portion 49 of the fixed dam block 70 passes through the seal block 40 and closes the seal block 40.

When the electromagnetic switching valve 90 is excited in this state, the residual air in the container 1 becomes about 0.2 to 0.5 seconds when the vacuum suction is started by the vacuum tank 20 and becomes 5 to 30 Torr in the container 1. . And the extrusion stem 1
When the pressure oil in the side cylinder reaches a predetermined pressure when the tip of the billet 13 hits the die 3, the upsetting is completed by switching to the main cylinder (not shown) (FIG. 17 (4)). .

Thereafter, the extrusion stem 14 continues to move forward without a break, and the billet 13 is crushed. Next, the extrusion is continued, and the product is extruded from the die 3. After the upset of the billet 13 is completed, the extrusion stem 14
After the extrusion of the product is started along with the advancement of the billet 13 (for example, one hour from the initial length before the extrusion of the billet 13 is started).
/ 3) The deaeration operation is stopped after elapse,
Subsequently, the seal block 40 (40R, 40L) is opened and immediately returns to the original retreat limit position. Thereafter, the extrusion by the extrusion stem 14 is performed, and the extrusion is completed.

During the operation of extruding the billet 13 from the die 3 to obtain an extruded product, the first billet holding portion 168 of the first billet loader 111 is lowered to the lower limit position, and the second billet loader 140 is As shown in FIG. 2, the rod 145 a of the telescopic cylinder 145 is extended, the billet holder 154 is horizontally moved to the forward limit, and is opposed to the billet carrier 141. Then, the delivery holder 143 of the billet carrier 141 is rotated, and the billet 13 enters the billet holding portion 154. In this state, the rod 145a of the telescopic cylinder 145 is retracted to the retreat limit. Next, the first billet holding unit 168 is moved from the lower limit position to the intermediate stop standby position.

The second billet loader 140 is moved until the holding portion 154 at the tip of the swing arm 149 is at the lower limit position of the first billet loader 111 as shown in FIG. Tilt and stand. Then, the billet 13 is moved to the second billet loader 14.
From 0, it is delivered to the first billet loader 111.

[0084]

As is apparent from the above description, in the present invention, the seal is provided by closing the two seal blocks disposed on the end face of the container on the extrusion stem side in the direction intersecting with the axial direction of the extrusion stem. Sufficient and high degree of vacuum allows sufficient deaeration, and the entire length of the extrusion press does not increase. By providing a substantially annular deaeration groove on the inner side of the ring-shaped protrusion on the extrusion stem side, aluminum residue adheres to the enlarged diameter portion at the tip of the fixed dam block, which increases the diameter of the enlarged diameter portion. Even if the air in the container can be degassed, the extruded profile without blister can be extruded stably, and the yield of the extruded profile of the product can be easily improved greatly. . The idle time is short because the sealing time of the two seal blocks is short. When the two seal blocks are closed, they are separated until immediately before they come into contact with the ring-shaped projection and the extrusion stem at the same time, and the life of the seal packing is long. Even after extruding the billet and scraping the aluminum residue with the outer peripheral surface of the fixed dummy block and dropping it outside the container when retracting the extrusion stem, the split block is not opened along the groove etc. High sealing performance can be maintained without clogging with aluminum residue. Since there is no need to perform a burp cycle as in the related art, the idle time can be reduced. By forming a donut-shaped groove on the end surface of the container on the extrusion stem side and mounting a heat-insulating seal block using a heat-insulating material to the minimum necessary, heat transfer from the container side can be prevented, and Since the heat-insulating seal block is mounted only on a part of the end face of the container on the side of the extrusion stem, the number of bolt mounting holes drilled on the end face of the container can be reduced, so that the mechanical strength does not decrease.

[Brief description of the drawings]

FIG. 1 is a system diagram of a preferred apparatus according to the present invention.

FIG. 2 is a front view as viewed from A to A in FIG. 1;

FIG. 3 is a plan view as viewed from BB in FIG. 2;

FIG. 4 is an enlarged sectional view of a main part of the seal block.

FIG. 5 is an enlarged partial cross-sectional view of a main part of the seal block.

FIG. 6 is a plan view as seen from DD in FIG. 4;

FIG. 7 is a plan view as viewed from C to C in FIG. 4;

FIG. 8 is an enlarged cross-sectional view of an essential part of the sealant cooling device attached to the seal block.

FIG. 9 is a comparison diagram in a case where a sealing material is stuck to a contact surface between two seal blocks.

FIG. 10 is an explanatory view showing a scraping state of aluminum residue adhering to the inner peripheral surface of the container liner.

FIG. 11 is a front view of a billet loader.

FIG. 12 is an enlarged sectional view of a protrusion.

FIG. 13 is an enlarged sectional view showing various shapes of an inner surface of a protrusion.

FIG. 14 is an explanatory diagram illustrating a mounting structure of a heat-insulating seal block.

FIG. 15 is an operation diagram showing a state in which the cooling medium is sprayed at the same time as the closing operation of the seal block.

FIG. 16 is an operation diagram showing a next operation state shown in FIG. 14;

FIG. 17 is an explanatory diagram showing a state in which a billet loaded in a container is extruded under pressure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Container tire 3 Dice 13 Billet 14 Extrusion stem 20 Vacuum tank 21 Vacuum pump 31 Deaeration space 32 End platen 33 Container cylinder 40 (40R, 40L) Seal block 40A Inner seal block 40B Outer seal block 41, 44, 46 Seal Packing 42 Guide plate 43 Cylinder 43a Piston rod 43b Clevis 44 Connection member 45 Deaeration hole 47 Insulation material 48 Insulation holding plate 50 Depression 51 Fitting member 53 Insulation ring 55 Insulation seal block 56 Recovery block 60 Vacuum suction device 61 (61a, 61b) Bearing 63 (63R, 63L) Swing arm shaft 64 (64R, 64L) Swing arm 65 (65R, 65L) Spur gear 65 (66R, 66L) Rotation base 67 Connection Member 70 Fixed dam block 72 First limit switch 73 Second limit switch 74 Third limit switch 80 Projection 90 Electromagnetic switching valve 91 Cooling device 92 Flexible piping 93 Electromagnetic switching valve 94 Fixed piping 95 Holding bolt 96 First cooling Medium passage 97 Second cooling medium passage 98 Lid 100 First gas outlet 101 First gas outlet 111 First billet loader 111a No. 1 billet loader 111b No. 2 billet loader 126 billet loading port 128 swing arm 129 lower tie rod 130 pivot center shaft 132 hydraulic drive cylinder device 133 billet holding unit 134 pedestal 140 second billet loader 141 billet carrier 142 inclined table 143 delivery holder 145 telescopic cylinder 146 moving frame 147 linear Guide 148 Holder 149 Swing arm for billet loader 150 Tilting stopper 151 (152) Retraction control stopper 153 Fixed frame 154 Billet holder 155 One end side of fixed frame 156, 158 Adjustment screw 157 Connection member 160 Rotating support shaft 161 Fixed frame 162 First swing arm 163 Center of rotation 164 Lifting stopper 165 Lowering stopper 166 First hydraulic drive cylinder device 167 Second oil Drive cylinder device 168 first billet holding unit 169 pedestal 171 clamp arm 172 connecting member 173 auxiliary cylinder

Claims (7)

(57) [Claims] 1. A ring-shaped projection provided on an end face of an extrusion stem of a container having a container liner into which a billet is to be loaded, and an opening and closing in an upper part of the end face of the container on the extrusion stem side in a direction intersecting with the axial direction of the extrusion stem. A pair of free two-piece ring-shaped seal block rotating bases, a two-piece ring-shaped seal block having one end of a swing arm fixed to the rotating base and fixed to the other end, and the seal block. When closed, the outer peripheral surface of the ring-shaped projection and the outer peripheral surface of the Fick Damii block or the extrusion stem can be simultaneously brought into close contact with each other through a seal member attached to the seal block contact surface side, and the seal block A cooling device for cooling the seal member. 2. A rotating base according to claim 1, wherein gears meshed with each other are arranged, and a distal end of a telescopic piston rod engaged with a cylinder is fixed to a side end of one of the swing arms. An extrusion molding apparatus, wherein the pair of swing arms can be simultaneously opened and closed as the piston rod expands and contracts. 3. An extrusion molding apparatus, wherein a deaeration groove is provided on an inner surface of the ring-shaped projection according to claim 1 on the extrusion stem side. 4. An extrusion molding apparatus according to claim 3, wherein the inner diameter of the deaeration groove is substantially circular, which is larger than the outer diameter of the fix dam block attached to the tip of the extrusion stem. 5. An extrusion molding apparatus, wherein a vacuum deaeration hole for removing residual air in a container is provided in the seal block according to claim 1, and the vacuum block is connected to a vacuum pump via a pipe. 6. A gas outlet which blows a cooling medium toward the seal member and blows off extraneous matter such as dust at the same time inside the ring-shaped seal block according to claim 1. Characteristic extrusion molding equipment. 7. The ring-shaped seal block according to claim 1, wherein the inner seal block has the seal member positioned inside the seal block, and the inner seal block is positioned outside the inner seal block to hold the inner seal block. The inner seal block has a first cooling medium passage surrounded by a lid and arranged radially, and an outer seal block holding the inner seal block. An extrusion molding device, wherein a second cooling medium passage is provided therebetween.