JP2000198133A - Extrusion machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extrusion machine equipped with an exhaust mechanism wherein a sufficient amount of a resin material can be exhausted, thread engagement is not included in an operation mechanism, and an operator is not required to stand in an exhaust direction in exhaust operation of the resin material. SOLUTION: A shaft component 8 is fitted so as to cross a passage 7 of a resin material 3 of a neck part 5 for jointing an extrusion part 1 to a extrusion head part 4, and space between a wall 5' of the neck part 5 and the shaft component 8 is sealed. The shaft component 8 can be rotated in the arrow B direction, a through hole 11 is provided at its almost center, and an exhaust passage 12 is provided from almost the center to a tip 9. The through hole 11 and a left end of an exhaust passage 12 are formed at a position shifted by 90 deg. in a circumferential direction of the shaft component 8, and the through hole 11 and the exhaust passage 12 have a mutual relation wherein when the shaft component 8 is rotated by a specific angle, one side hides in a wall 5' and the other side is positioned at the passage 7, and when the shaft component 8 is rotated by another angle, the other side hides in the wall 5' and another side is positioned at the passage 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extruder,
In particular, the present invention relates to an extruder provided with a discharge mechanism for overflowing a resin material.

[0002]

2. Description of the Related Art In an extruder for extruding a thermoplastic resin material such as rubber or plastics as a wire covering or a pipe, an extrusion head for molding and discharging the resin material into a predetermined size and shape, It is common to have two discharge means of a discharge mechanism which is located between the extrusion section and the extrusion head section and discharges a small amount of resin material.

[0003] A discharge mechanism for discharging a small amount of resin material is used, for example, to check the kneading state of the resin material in the extruder or to confirm the color tone of the resin material at the start of the extrusion operation. Is provided in the
After the state of the resin material is confirmed by a predetermined overflow, the resin material is closed to start extrusion.

FIG. 5 shows a configuration of a conventional extruder, wherein 1 is an extruding section, 2 is a screw for rotating in the extruding section to knead and extrude the resin material 3 into a homogeneous state, 4 is an extrusion head portion, 5 is an extrusion portion 1 and an extrusion head portion 4.
Shows the neck part that follows.

In many cases, a die and a nipple (both not shown) are concentrically mounted on the tip of an extrusion head 4 mounted in a crosshead format, and a resin material 3 that has melted a gap between these components is provided. By passing, a product molded into a predetermined shape is extruded.

[0006] Reference numeral 6 denotes a discharge mechanism attached to the side of the neck portion 4, and a hole 13 formed in the neck portion 5, an overflow cock 14 screwed into the hole 13, and an abutment with the overflow cock 14. It comprises a valve 15.

The discharge H of the resin material 3 is performed by rotating the overflow cock 14 in a loosening direction, thereby forming a gap between the overflow cock 14 and the valve 15 for allowing the resin material 3 to pass therethrough. Is stopped by screwing the overflow cock 14 into contact with the overflow cock 14 and the valve 15. The discharge mechanism 6 having this configuration is widely used because of its simple structure.

[0008]

However, according to the conventional extrusion apparatus, since the discharge H of the resin material 3 from the discharge mechanism 6 is orthogonal to the flow I to the extrusion head section 4, the resin material 3 As a result, I becomes the mainstream, and as a result, there is a tendency that a sufficient amount of discharge H cannot be obtained.

Further, since the connection between the neck portion 5 and the overflow cock 14 is screwed, the overflow cock 1
Since the discharge and the stop are performed by turning the nozzle 4 many times, the operation is troublesome, and the direction of the high-temperature discharge H becomes the direction of the operator who operates the overflow cock 14, which is dangerous.

Accordingly, it is an object of the present invention to discharge a sufficient amount of resin material, does not include a screw engagement in an operation mechanism, and furthermore, when discharging resin material, the operator is required to discharge the resin material in the discharging direction. An object of the present invention is to provide an extruder provided with a discharge mechanism that does not require standing.

[0011]

In order to achieve the above object, the present invention provides an extrusion unit for extruding a resin material, an extrusion head unit attached to the extrusion unit, the extrusion unit and the extrusion head. In an extrusion apparatus comprising a discharge mechanism attached to an intermediate portion of the portion and discharging the resin material to the outside, the discharge mechanism exposes a tip from the intermediate portion to the outside to remove the resin material in the intermediate portion. A shaft member attached to the intermediate portion so as to traverse the passage and sealed between a wall of the intermediate portion so as to be rotatable about an axis, wherein the shaft member is formed of the resin material Through the through-hole from the side of the extrusion section to the side of the extrusion head, and the tree formed from a position different from the through-hole in the circumferential direction of the shaft member from the tip. The through hole and the discharge path, when the shaft member rotates at a predetermined angle, one is hidden in the wall and the other is located in the passage, and the shaft member is An object of the present invention is to provide an extruding device in which, when rotated at an angle different from the predetermined angle, the other is hidden in the wall and one is located in the passage.

Further, in order to achieve the above object, the present invention provides an extruding section for extruding a resin material, an extruding head attached to the extruding section, and an intermediate section between the extruding section and the extruding head. In the extrusion apparatus, which is provided with a discharge mechanism that discharges the resin material to the outside, the discharge mechanism exposes a tip from the intermediate portion to the outside and crosses the resin material passage in the intermediate portion. A shaft member that is attached to the intermediate portion, and is sealed between the wall of the intermediate portion so as to be slidable in the axial direction. And a discharge hole for the resin material formed from a position axially spaced from the through hole to the tip from the through-hole to the extrusion head side, and the through-hole The discharge path is such that when the shaft member slides to one side, one is hidden in the wall and the other is located in the passage, and when the shaft member slides to the other, the other is hidden in the wall. The present invention provides an extruder configured so that one end is located in the passage.

[0013]

In the invention shown in FIG.
It is preferable to form the shaft member by shifting the position by 90 degrees in the circumferential direction. A configuration in which the rear end of the shaft member protrudes outward from the above-described intermediate portion to form a polygonal head at that portion, and a tool is locked to this head to rotate the shaft member is simple. Yes, and often employed. A configuration in which the shaft member is rotated by a low-speed motor or the like without manual operation is possible.

[0014]

In the case of the invention described in the above, it is preferable that the shaft member is slid by a hydraulic or pneumatic cylinder. Further, incorporating a slide positioning stopper into this structure is advantageous in that the through hole is provided for the flow of the resin material. It is practical because the position of the discharge path can be set correctly. Stoppers may be provided at both ends of the operating width of the shaft member,
Alternatively, it may be provided in the cylinder itself.

The seal between the shaft member and the wall at the intermediate portion may be performed by setting a small clearance between the shaft member and the wall. It is preferable to use a structure in which a material that can ensure the above is interposed.

In many cases, the resin material discharge passage formed in the shaft member is formed in a groove shape on the surface of the shaft member. However, a hole is formed in the surface of the shaft member, and a through hole extending from the hole is formed in the shaft member. It may be formed at the axis of the member, and may be configured to discharge the resin material entered through the hole to the outside through the through hole.

In an extrusion apparatus having a plurality of resin material flow paths, a plurality of flow paths

001 and

It is possible to apply the inventions in combination. The shaft member may have a plurality of through holes and a plurality of discharge paths.

[0018]

Next, an embodiment of an extrusion apparatus according to the present invention will be described. In FIG. 1, 1 is an extruding portion, 2 is a screw, 3 is a resin material such as rubber or plastics extruded by the screw 2, 4 is an extruding head portion, 5 is an intermediate portion between the extruding portion 1 and the extruding head portion 4. A neck portion 6 for connecting the two is provided between the extruding portion 1 and the extruding head portion 4 at a passage 7 of the resin material 3 in the neck portion 5.
5 shows a discharge mechanism in which a shaft member 8 is inserted through a neck portion 5 so as to cross the same.

The shaft member 8 and the wall 5 'of the neck portion 5 are sealed so that the resin material 3 does not leak outside through a gap between the shaft member 8 and the shaft member 8 in this sealed state. It is mounted so that it can rotate in the direction.

The shaft member 8 has a tip 9 exposed to the outside from the neck portion 5, while a rear end having a square cross section for locking a tool when rotating the shaft member 8 is provided. 10 are formed.

Reference numeral 11 denotes a through hole formed substantially at the center of the shaft member 8, and 12 denotes a groove formed on the surface of the shaft member 8 from a position different from the through hole 11 substantially at the center of the shaft member 8 to the tip 9. 2 shows a discharge path.

FIG. 2 shows the shaft member 8 in the AA cross section of FIG. 1. The shaft member 8 has a circular cross section, and the through hole 11 and the discharge passage 12 are formed in the circumferential direction of the shaft member 8. Are formed at positions shifted from each other by 90 degrees.

FIG. 3 shows the movement of the shaft member 8 and the flow of the resin material 3 based on the AA sectional view of FIG.
In both cases (a) and (b), the left side corresponds to the extruded portion 1 side. When the rotation angle of the shaft member 8 is set as shown in (a), the discharge passage 12 is hidden in the wall 5 ′ of the neck portion 5, while the through hole 11 is located in the passage 7. Therefore, the resin material 3 flows through the through-hole 11 as shown by the arrow C, and the resin material 3 is sent to the extrusion head portion 4 to perform a predetermined extrusion operation.

On the other hand, when the rotation angle of the shaft member 8 is set as shown in FIG.
, While the discharge channel 12 is located in the channel 7. Therefore, in this case, the resin material 3 flows in the space defined by the wall 5 ′ of the neck portion 5 and the discharge passage 12 in the direction of arrow D in FIG.
Will overflow to the outside. Through hole 1
1 is completely closed, there is no flow toward the extrusion head 4 side, and the discharge amount of the resin material 3 from the discharge mechanism 6 is sufficient.

FIG. 4 shows another embodiment of the extrusion apparatus according to the present invention. The difference from FIG. 1 is that the shaft member 8 is configured to be slidable in the directions of arrows E and F shown in FIG. 1A, and the shaft member 8 is shown in FIG. 8 is a square section,
The through hole 11 and the discharge path 12 are formed at intervals on one side of a square section of the shaft member 8. A sealing process is performed between the shaft member 8 and the wall 5 ′ of the neck portion 5.

According to the extruder shown in FIG. 4, when the shaft member 8 slides in the direction of arrow E, the discharge passage 12 is hidden in the wall 5 'as shown in FIG. Is located in the passage 7, so that the resin material 3
1 and flows to the side of the extrusion head section 4 to perform a predetermined extrusion operation.

On the other hand, when the shaft member 8 slides in the direction of arrow F, the through-hole 11 is hidden in the wall 5 'of the neck portion 5, so that the resin material 3
Supply stops. On the other hand, since the left end of the discharge path 12 is located in the path 7, the resin material 3 flows into the space formed by the wall 5 ′ and the discharge path 12,
As a result, a sufficient amount of the resin material 3 is discharged from the discharge mechanism 6.

[0028]

As described above, according to the extruder according to the present invention, the extruder crosses the resin material passage in the intermediate portion between the extruder and the extruder head, and the tip is exposed from the intermediate portion to the outside. A shaft member is attached, a through hole through which the resin material passes to the extrusion head portion side and a discharge path for guiding the resin material to the tip end are formed in the shaft member, and an intermediate portion is formed so that the shaft member can be rotated or slid. Sealing between the wall of the shaft member and the shaft member, rotating or sliding the shaft member to hide one of the through hole and the discharge passage in the wall of the intermediate portion, and position the other in the passage of the resin material, With this configuration, the flow of the resin material to the extrusion head portion and the flow of the resin material to the discharge mechanism can be selected, so that the following effects can be obtained.

(1) Since the supply of the resin material to the extrusion head portion is stopped when the resin material is discharged from the discharge mechanism, the amount of the resin material discharged from the discharge mechanism can be made sufficient.

(2) Since the extrusion and the discharge from the discharge mechanism are selected by rotating or sliding the shaft member, these can be switched in a short time.
Therefore, it takes less time and effort than the conventional screw engagement.

(3) Since it is not necessary to operate the discharge mechanism in the discharge direction of the resin material as in the prior art, the safety is enhanced. (However, in the present invention, the operation part of the discharge mechanism is moved to the discharge side. It does not deny setting).

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of an extrusion apparatus according to the present invention.

FIG. 2 is an explanatory view showing a structure of a shaft member in a cross section AA of FIG. 1;

FIGS. 3A and 3B are cross-sectional views taken along the line AA of FIG. 1. FIG. 3A is an explanatory diagram illustrating a flow of a resin material during an extrusion operation, and FIG. FIG.

FIGS. 4A and 4B are explanatory views showing another embodiment of the extrusion apparatus according to the present invention, wherein FIG. 4A is an explanatory view showing a flow of a resin material during an extrusion operation, and FIG. FIG.

FIG. 5 is an explanatory view of a conventional extrusion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Extrusion part 2 Screw 3 Resin material 4 Extrusion head part 5 Neck part 5 'Wall 6 Discharge mechanism 7 Passage 8 Shaft member 9 Tip 10 Head 11 Through hole 12 Discharge path

Claims (5)

[Claims] An extruding section for extruding a resin material, an extruding head attached to the extruding section, and a discharge mechanism attached to an intermediate portion between the extruding section and the extruding head for discharging the resin material to the outside. In the extrusion apparatus, the discharge mechanism is attached to the intermediate portion so that a tip thereof is exposed to the outside from the intermediate portion so as to cross the path of the resin material in the intermediate portion, and is centered on an axis. A shaft member sealed between the wall of the intermediate portion so as to be rotatable, and the shaft member has a through-hole for allowing the resin material to pass from the side of the extrusion section to the side of the extrusion head section. And a discharge path for the resin material formed from a position different from the through hole in the circumferential direction of the shaft member to the tip end, wherein the through hole and the discharge path When the member rotates at a predetermined angle, one is hidden in the wall and the other is located in the passage, and when the shaft member rotates at an angle different from the predetermined angle, the other is inside the wall. An extrusion device having a configuration in which one is hidden and located in the passage. 2. The extruder according to claim 1, wherein the forming position of the through hole and the discharge path is shifted by 90 degrees in the circumferential direction of the shaft member. 3. The extruder according to claim 1, wherein a rear end of said shaft member has a head projecting from said intermediate portion to the outside, and a head for locking a tool at said projected portion. 4. An extruding portion for extruding a resin material, an extruding head portion attached to the extruding portion, and a discharge mechanism attached to an intermediate portion between the extruding portion and the extruding head portion for discharging the resin material to the outside. In the extrusion apparatus, the discharge mechanism is attached to the intermediate portion so that a tip thereof is exposed to the outside from the intermediate portion and crosses the resin material passage in the intermediate portion, and slides in an axial direction. A shaft member sealed between the wall of the intermediate portion as possible, the shaft member is a through-hole that allows the resin material to pass from the side of the extrusion section to the side of the extrusion head section, And a discharge passage for the resin material formed from a position spaced apart in the axial direction from the through-hole to the tip end, wherein the shaft member slides in one of the through-hole and the discharge passage. When pushed, one is hidden in the wall and the other is located in the passage, and the other is hidden in the wall and one is located in the passage when the shaft member slides to the other. . 5. The extruder according to claim 4, wherein said shaft member is slid using a cylinder as a drive source.