JP3162665B2 - Extrusion molding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an extruder for molding aluminum or the like.

[0002]

2. Description of the Related Art In a conventional extruder, as shown in FIG. 18, a front wall a having a discharge port c and a rear wall b are opposed to each other with a space therebetween, and the front wall a and the rear wall b are connected to each other. A mold supporting portion d, a material barrel e, and a pressing device f are arranged in this order from the front, and a cutter g that faces the front surface of the mold supporting portion d and protrudes and retracts so as to block a passage between the mold supporting portion d and the discharge port c. Is provided.

A piston rod i of a front cylinder h is fixed on both sides of the material barrel e. When the piston rod i is moved forward and backward, the material barrel e moves along an axial direction intersecting the front wall a and the rear wall b. It reciprocates. Further, a piston rod j of the rear cylinder is fixed to both sides of the pressing device f, and a plunger k of the main cylinder is fixed to the center of the piston rod j.
When the plunger k is moved forward and backward, the pressing device f reciprocates along the axial direction. Pressing device f
A compression rod l is protruded from the front surface of the material barrel and inserted into and removed from the material barrel e along with the reciprocating movement.

[0004] Then, a mold having an appropriate shape is set on the mold supporting portion d, the melted raw material is stored in the material barrel e, and the pressing device f is brought close to the material barrel e to move the compression rod l to the material barrel. e, the melted raw material is extruded toward a mold, drawn out through an outlet c while being formed into an appropriate cross-sectional shape, and a product having a predetermined length is drawn out from the outlet c. It is designed to separate the puddle.

However, in the above-mentioned conventional extruder, the material barrel e and the pressing device f are such that the supporting legs m projecting from the lower sides on both sides thereof are sliding between the lower portions on both sides of the front wall a and the rear wall b. Since it is only supported by being slidably engaged with the table n, the movement is not stable, and it is easy to vibrate. As a result, the thickness of the product may be uneven. In addition, since the cutter g is formed by directly attaching the cutting blade to the tip of the piston rod, the cutting blade is likely to swing when operated, and it may not be possible to cut the press smoothly.

Further, when molding a cylindrical product,
As shown in FIG. 19, usually, the outer mold p corresponding to the outer periphery of the product is housed in the mold support portion d, and the core o corresponding to the hollow portion of the product is provided inside the outer mold p. The raw material was poured between the core o and the outer mold p while supporting o from the outside. However, according to this method, as shown in FIG.
The cross section of the extruded product q is cut at the portion supporting the core o, and the product q formed into a complete ring after being extruded has a bad appearance due to scratches, Becomes non-uniform.

[0007]

SUMMARY OF THE INVENTION The present invention can improve the accuracy of a product by preventing the material barrel, cutter, and pressing device from shaking or vibration, and can improve the accuracy of a product particularly when a cylindrical product is formed. An object of the present invention is to provide an extruder capable of forming no cut in the cross section.

[0008]

The extruder according to the present invention comprises:
A front wall having a discharge port and a rear wall are opposed to each other at an interval, and a mold support, a material barrel, and a pressing device are sequentially arranged from the front between the front wall and the rear wall, and the mold support is provided. Facing the front surface, a cutter is provided that protrudes and retracts so as to block the passage between the mold support portion and the discharge port, and the material barrel and the pressing device can reciprocate along an axial direction intersecting the front wall and the rear wall. The pressing device is constituted by projecting a compression rod that is inserted into and pulled out of the material barrel along with the reciprocating movement on the front surface of the pressing device, and the cutter is fixed to the front wall and a block fixed to the front wall. A pair of rails mounted so as to face each other, a sliding piece slidably engaged with the rail, and a cutting blade mounted at a tip of the sliding piece, and four corners of the front wall and the rear wall. Between A guide rod parallel to the axial direction is erected, and guide tables are respectively provided along the axial direction outside the lower guide rod, and the guide rod slides at four corners of the material barrel and the pressing device. While being freely inserted, the supporting legs projecting from both lower sides of the material barrel and the pressing device are slidably engaged with the guide table, and are independent of the compression bar along the center axis of the compression bar. And slides along the axial direction, and, along with the sliding, inserts a sliding rod that is inserted into and removed from the center of the mold supporting portion.

Guide rods are inserted into the four corners of the material barrel and the pressing device, and the supporting legs projecting from both lower sides of the material barrel and the pressing device are slidably engaged with the guide table, so that the material barrel and the pressing device are slidable. Is prevented, and the sliding path is stabilized. In addition, the cutting blade of the cutter is slidably provided on the block fixed to the front wall via the rail and the sliding piece guided by this, so that the cutting blade is prevented from swinging and is slidably moved. Move. Furthermore, the core supported from the outer peripheral side when extruding a cylindrical product is formed by inserting a sliding rod that is inserted into and removed from the center of the mold support along the central axis of the compression rod. It becomes unnecessary.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an extruder according to the present invention comprises a front wall 2 having a discharge port 60, a rear wall 4 opposed to the front wall 2 at an interval from the front wall 2, and a front wall 2 having a space. A mold support portion 3, a material barrel 7, and a pressing device 13, which are sequentially arranged from the front along an axial direction orthogonal to the front wall 2 and the rear wall 4, that is, in a product extrusion direction, between the front wall 2 and the rear wall 4.
The cutter 1 is provided facing the front surface of the mold support portion 3 and protrudes and retracts so as to block a passage between the mold support portion 3 and the discharge port 60.

Guide rods 5 extending in parallel with the axial direction are provided between the four corners of the front wall 2 and the rear wall 4, respectively.
A guide table 6 is arranged outside the lower guide rod 5 along the axial direction. In addition, on the rear surface of the front wall 2, a mold supporting portion 3 that exchangeably supports a mold having an appropriate shape is provided facing the discharge port 60.

As shown in FIG. 2, the cutter 1 is mounted above the mold support 3 so as to be fixed to the rear surface of the front wall 2 so as to stand upright, and is mounted on the side surface of the block 22 so as to face each other. A pair of rails 23 and rail 2
Sliding piece 2 slidably engaged between 3
4 and a cutting blade 25 attached to the tip of the sliding piece 24.

A mounting plate 26 is mounted on the surface of the block 22 on the front wall 2 side, and a guide groove 27 is formed on the opposite side surface along the vertical direction. Also, guide groove 2
Rail engaging grooves 28 are formed on the opposing side surfaces of each of the rails 7 along the vertical direction, and the rails 23 are fitted and screwed into the respective rail engaging grooves 28 so as to protrude inward. Further, a guide groove 27 is provided on the upper surface of the block 22.
Is formed.

The sliding piece 24 is a block 2
A concave groove 29 having a width to be fitted in the second guide groove 27 and slidably engaging with the rail 23 is formed on both side surfaces thereof. A locking recess 30 is formed on the outer surface of the lower end of the sliding piece 24.
The upper part of 5 is fitted and screwed. Further, a screw hole 31 is formed on the upper surface of the sliding piece 24.

As shown in FIGS. 3 to 5, the sliding piece 24 is inserted into the guide groove 27 of the block 22.
And the cutter 1 is assembled by slidably engaging the rail 23 and the concave groove 29. Also, as shown in FIG. 1, the mounting plate 26 is fixed to the rear surface of the front wall 2, and the cutter 1 is mounted so that the cutting blade 25 faces the rear surface of the mold support portion 3, and the piston rod reciprocates up and down. The tip of 61 is screwed into the screw hole 31 of the sliding piece 24 through the circular hole 32 of the block 22. Therefore, when the piston rod 61 is moved up and down, the sliding piece 24 moves up and down, and the cutting blade 25 provided at the lower end thereof protrudes and retracts so as to block the passage between the mold support portion 3 and the discharge port 60.

As shown in FIG. 6, the material barrel 7 has a hollow body into which the molten material is poured, and projecting pieces 8 project radially from the four corners thereof. A sleeve 9 is provided. In addition, the support legs 10 are respectively protruded outside the lower projecting pieces 8. Then, as shown in FIG. 7, the guide rod 5 is slidably inserted into each sleeve 9, and as shown in FIG.
Are slidably engaged with the upper surfaces of the guide tables 6 on both sides, respectively, so that the material barrel 7 is supported so as not to swing up, down, left and right.

As shown in FIG. 1, front cylinders 11 are arranged on both front sides of the front wall 2 along the axial direction, and a piston rod 12 connected to a piston reciprocating in the front cylinder 11 has a front wall. 2 and its tip is fixed to both sides of the material barrel 7. Therefore, when the piston rod 12 is reciprocated, the material barrel 7 slides along the axial direction, and comes into contact with and separates from the mold support 3.

The pressing device 13 has a plate that is slightly wider than the hollow body of the material barrel 7, and as shown in FIG. A sleeve 15 is provided at the tip. Further, protrusions 21 are formed on both sides of the pressing device 13 so that the lower protruding piece 1 is formed.
The support legs 43 project from the outside of each of the four. As shown in FIG. 9, the guide rods 5 are slidably inserted into the respective sleeves 15, and the left and right support legs 43 are slidably fitted on the upper surfaces of the guide tables 6 on both sides as shown in FIG. When engaged, the pressing device 13 is supported so as not to swing up, down, left and right similarly to the material barrel 7.

As shown in FIG. 1, a rear cylinder (not shown) is disposed along the axial direction on both rear sides of the rear wall 4, and a main cylinder 17 is disposed along the axial direction at a central rear portion. A piston rod 20 connected to a piston reciprocating in the rear cylinder penetrates the rear wall 4, and its tip is fixed to the center of each of the projections 21 on both sides, and a plunger 18 reciprocates in the main cylinder 17.
Are fixed to the center of the high surface of the rear wall 4. Therefore, when the piston rod 20 and the plunger 18 are reciprocated,
The pressing device 13 slides along the axial direction, and comes into contact with and separates from the material barrel 7.

Further, as shown in FIG.
A compression rod 16 is provided in the center of the front surface of the first member along the axial direction.
As shown in FIG. 10, the outer diameter of the distal end portion of the compression rod 16 is formed slightly smaller than the outer diameter of the proximal end portion, and a through hole 48 is formed along the central axis as shown in FIG. At the same time, a copper tube 57 is mounted on the inner peripheral surface of the through hole 48. As shown in FIG. 1, a sliding rod 45 is slidably inserted in the copper tube 57 along the axial direction.

The sliding rod 45 includes a front rod 46 and a connecting rod 44 as shown in FIGS. As shown in FIGS. 14 and 15, the front rod 46 has a tip portion formed in a conical shape, a flange 47 protruding on the outer periphery near the rear portion, and a tapered portion 49, a spline 50, and a connecting rod-shaped portion behind the flange 47. 51 are formed in this order. Further, a slot 52 having a long hole shape in cross section is formed in the connecting rod portion 51.

As shown in FIGS. 12 and 13, a hollow portion 53 having a shape corresponding to the tapered portion 49, the spline 50 and the connecting rod portion 51 of the front rod 46 is formed at the front end of the connecting rod 44. A slot 54 corresponding to the slot 52 of the front rod 46 is formed in the peripheral wall at the back of the portion 53. Then, as shown in FIGS. 15 and 16, the tapered portion 49, the spline 50 and the connecting rod-shaped portion 51 of the front rod 46 are fitted into the hollow portion 53 of the connecting rod 44, and the flange 47 is connected to the connecting rod 4.
The connecting rod 44 is connected to the rear part of the front rod 46 by inserting the fixing pins into the slots 52 of the front rod 46 and the slots 54 of the connecting rod 44.

As shown in FIG. 1, a rear cylinder 56 is disposed axially behind the main cylinder 17, and a rear end of the connecting rod 44 is connected to a piston reciprocating in the rear cylinder 56. . Therefore, FIG. 15 and FIG.
As shown in FIG. 6, the sliding rod 45 slides along the axial direction independently of the compression rod 16 and the pressing device 13 to bring the material barrel 7 into contact with the mold support portion 3 and to press the pressing device 13 with the material. When the sliding rod 45 is advanced while being in contact with the barrel 7, the tip of the sliding rod 45 is inserted into the center of the mold support 3.

The extruder of the present invention is used as follows. In advance, the material barrel 7 is retracted and separated from the mold support portion 3, and the pressing device 13 is retracted and separated from the material barrel 7, and a mold having an appropriate shape is stored in the mold support portion 3. Next, the material barrel 7 is advanced to bring its front surface into contact with the mold support 3.

Next, the pressing device 13 is advanced to move the compression rod 1
6 is inserted into the hollow body of the material barrel 7, and the molten raw material injected into the material barrel 7 is pushed out to the discharge port 60 through the mold supported by the mold support 3. At this time, the material barrel 7 and the pressing device 13 are guided by the guide rod 5 and the guide table 6 and slide stably without vibration. The thirteen compression rods 16 are assembled at precise positions with respect to each other, so that the thickness of the product is uniform and no dimensional error occurs.

When the extrusion of the product is completed, the cutter 1
The cutting rod 25 provided at the lower end of the sliding piece 24 is lowered by moving the piston rod 61 connected to the sliding piece 24 to separate the pressing residue attached to the mold. Also, at this time, the sliding piece 24 is guided by the rail 23 and slides on an accurate track, so that the cutting blade 25 stably descends without swinging,
Smooth cutting can be performed.

When molding a cylindrical product, the mold support 3
After assembling a mold having a hollow section with a circular cross section, the material barrel 7 and the pressing device 13 are moved closer to the mold supporting portion 3 as in the case of other products, and as shown in FIG. 45 is advanced and its tip is inserted into the center of the mold housed in the mold support 3. Then, the extruded raw material passes between the inside of the mold and the sliding rod 45 and is formed into a cylindrical shape, so that there is no break in the cross section of the product.

[0028]

According to the extrusion molding machine of the present invention, the material barrel and the pressing device are guided by the guide rod and the guide table, and slide stably without vibration. Also, there is no fear that the position of the pressing device is shifted, and therefore, a product having a uniform thickness and high dimensional accuracy can be obtained.

Further, since the sliding piece supporting the cutting blade slides on an accurate track guided by the rail, the cutting blade descends stably without swinging, and as a result, adheres to the mold. Pushing can be cut smoothly. Furthermore, since a sliding rod is provided along the central axis of the compression rod so that the central portion of the mold supporting portion can be inserted and withdrawn, it is supported from the outer peripheral side at the center of the mold when molding a cylindrical product. Since there is no need to provide a core, a cut is not formed in the cross section of the product, and a product with good appearance and uniform cross-sectional performance can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view of an extrusion molding machine showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a cutter.

FIG. 3 is a perspective view of a cutter.

FIG. 4 is a longitudinal sectional view of a cutter.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a front view of a material barrel.

FIG. 7 is a side view of the above.

FIG. 8 is a front view of the pressing device.

FIG. 9 is a side view of the above.

FIG. 10 is a side view of a compression rod.

FIG. 11 is a sectional view of the above.

FIG. 12 is a side sectional view of a connecting rod.

FIG. 13 is a sectional view taken along line BB of FIG. 12;

FIG. 14 is a side view of a front rod.

FIG. 15 is a sectional view taken along line CC of FIG. 12;

FIG. 16 is a sectional view of the compression rod and the sliding rod when the sliding rod is retracted.

FIG. 17 is a sectional view of the compression rod and the sliding rod when the sliding rod is advanced.

FIG. 18 is a perspective view of a conventional extruder.

FIG. 19 is a front view of a conventional mold.

FIG. 20 is a perspective view of a conventional cylindrical product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cutter 2 Front wall 3 Pressing device 4 Rear wall 5 Guide rod 6 Guide table 7 Material barrel 8 Projection piece 9 Sleeve 10 Support leg 11 Front cylinder 12 Piston rod 13 Pressing device 14 Projection piece 15 Sleeve 16 Compression rod 17 Main cylinder 18 Plunger Reference Signs List 20 piston rod 21 protrusion 22 block 23 rail 24 sliding piece 25 cutting blade 26 mounting plate 27 guide groove 28 rail locking groove 29 concave groove 30 locking concave part 31 screw hole 32 circular hole 43 support leg 44 connecting rod 45 sliding rod 46 Front rod 47 Flange 48 Through hole 49 Taper 50 Spline 51 Connecting rod 52 Slot 53 Cavity 54 Slot 57 Copper tube 60 Discharge port 61 Piston rod

──────────────────────────────────────────────────続 き Continuing the front page (72) Inventor Urun Der Taiwan, Tainan City, Huan Road, Section 6, Lane 103, Array 99, 2 (72) Inventor Umin Fan Taiwan, Tainan Shen, Jen-Tessian, Pay-Pao-Thun Road, Lane 46, 8 (58) Fields investigated (Int. Cl. ⁷ , DB name) B21C 23/00-35/06

Claims (1)

(57) [Claims] 1. A front wall having a discharge port and a rear wall are opposed to each other with a space therebetween, and a mold support, a material barrel, and a pressing device are arranged between the front wall and the rear wall in order from the front, Providing a cutter that faces the front surface of the mold support portion and protrudes and retracts to block a passage between the mold support portion and the discharge port,
The material barrel and the pressing device can be reciprocated along an axial direction intersecting the front wall and the rear wall, and a compression rod inserted into the material barrel with a reciprocating motion is projected on the front surface of the pressing device. In the extruder provided, the cutter includes a block fixed to the front wall, a pair of rails mounted on the block so as to face each other, and a sliding piece slidably engaged with the rail. ,
A cutting blade attached to the tip of the sliding piece, and guide rods parallel to the axial direction are respectively installed between the four corners of the front wall and the rear wall, and guide tables are respectively provided outside the lower guide rods. Are provided along the axial direction, the guide rods are slidably inserted into the four corners of the material barrel and the pressing device, and support legs projecting from both lower sides of the material barrel and the pressing device are slid on the guide table. It is movably engaged, slides along the central axis of the compression rod, independently of the compression rod, along the axial direction, and, along with the sliding, moves to the center of the mold support. An extrusion molding machine characterized by inserting a sliding rod to be inserted and withdrawn.