JPH0938927A - Extrusion molding machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extrusion molding machine well removing an old raw material at a time of the replacement with a raw material to smoothly performing replacing work. SOLUTION: In an extrusion molding machine rotating an auger screw S in a body part 1 to extrude a raw material in the axial direction of the auger screw while pressing the same to the inner wall surface of the body part 1, the ceramics parts 6a, 6a, 6a provided to the inner ends of a large number of projection bolts 6 are provided to the inner wall surface of the body part 1 so as to produce therefrom.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to an extruder,
In particular, it relates to the improvement of the body of an extruder.

[0002]

2. Description of the Related Art A body portion of an extrusion molding machine conventionally used for manufacturing a base material such as a tile has an auger screw S inside a body portion 51 as shown in a schematic configuration diagram in FIG. By rotating the auger screw S, the raw material soil is extruded in the axial direction of the auger screw.
A liner 52 as shown in FIG.
Is attached to the inner peripheral surface of the liner 52, and a plurality of groove portions 54 are formed in a concave shape between partition frames 53 formed vertically and horizontally. The auger screw S rotates to rotate the shaft. When the raw material soil is extruded in the direction, the raw material soil is pressed against the groove portion 54 of the liner 52, and a force is applied vertically and horizontally to the raw material soil between the rotation direction of the auger screw S and the groove portion 54 of the liner 52. It is configured to extrude raw material soil.

However, in the prior art, since such a liner 52 is attached, when the product number of the tile or the like to be manufactured is switched, it is replaced with a raw material having a different color or the like. The old raw material soil sticks and remains in the groove 54 of the liner 52, and when the new raw material soil is extruded, the old raw material soil stacked on the surface of the new raw material soil is extruded to produce a defective product. In particular, it is very difficult to remove the dry and hardened old raw material soil remaining in the groove portion 54, and the body portion 51 is disassembled and the groove portion 5 of the liner 52 is removed.
If No. 4 is cleaned, there is a problem that a lot of time is required for the work and the manufacturability is deteriorated.

[0004]

The present invention has been devised in view of the above-mentioned problems of the prior art, and it is not possible to provide an extruder in which old raw materials do not remain when the raw materials are switched. The first gist of the present invention is to provide an extrusion molding machine in which an auger screw is rotated in the body portion and the raw material is pressed against the inner wall of the body portion in the axial direction of the auger screw. That is, a large number of protrusions are provided. A second gist is that the protrusion is formed of a bolt, and the bolt is inserted from the outside of the body portion toward the inside. Also,
The third gist is that the outer circumference of the protrusion on the inner end side is surrounded by ceramics. The fourth gist is that a plurality of the bolts are attached to a plate member in advance and the plate member is fixed to the outer peripheral surface of the body portion.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a half sectional configuration diagram of a body portion of an extruder, FIG. 2 is an external configuration diagram of the body portion, and FIG.
It is an inner peripheral side perspective view of the cylinder which comprises a body part. In the figure, a body portion 1 of an extrusion molding machine is configured such that a left cylinder 2 and a right cylinder 3 are joined to each other by joining joining flange portions 2a and 3a, respectively, and the joining flange portions 2a and 3a are joined together. Each of them has a bolt hole 2b formed therein, and a plurality of joining bolts 10 are inserted into the bolt holes 2b, 2b to connect the left cylinder 2 and the right cylinder 3 to each other to form a cylindrical body portion 1. In this example, mounting plane portions 4, 4, 4 are formed on the outer peripheral surface of each cylinder 2, 3 at predetermined intervals in the radial direction along the longitudinal direction. A plate member 8 having a flat plate shape as shown in FIG. 4 can be fixed on the portions 4, 4, 4 from the outside in an abutting manner.

Further, each of the cylinders 2 and 3 has a large number of insertion holes 5, 5 and 5 penetrating from the outside to the inside.
Inside the insertion holes 5, 5, 5 from the outside, the projection bolts 6, 6,
6 is inserted, and the protruding bolt 6 is shown in FIG.
As shown in the perspective view, ceramics is attached to the outer circumference on the inner end side, and the outer circumference on the inner end side is surrounded by the ceramics portion 6a.

As shown in FIG. 4, a plurality of projecting bolts 6, 6, 6 are attached to the plate member 8 in advance, and in this state, each plate member 8 is fixed to the mounting plane portion 4 by bolts or the like. As a result, a plurality of projecting bolts 6, 6, 6 are attached to the cylinders 2, 3, and the projecting length of each projecting bolt 6, 6, 6 with respect to the inner peripheral surface of each cylinder 2, 3 is set appropriately by the nut 7, It can be adjusted via 7, 7, and each protrusion bolt 6, 6, on the inner peripheral surface as shown in FIG.
The ceramic parts 6a, 6a, 6a on the inner end side of 6, 6 are projected.

It is preferable that about 120 protrusion bolts 6 are attached to the body portion 1, and the auger screw S is provided in the body portion 1 in which the inner end sides of the many protrusion bolts 6 are projected in this manner. When the raw material soil is pushed out along the rotation direction of the auger screw S by rotating the raw material soil, the raw material soil is pressed against the inner peripheral surfaces of the respective cylinders 2 and 3, and the ceramics portion 6a of the protruding bolt 6 is projected respectively. A force is applied vertically and horizontally to the raw material soil, whereby a good pressing force is obtained and the raw material soil is pushed out toward the outlet side. In this case, since the ceramic portion 6a on the tip end side of the protrusion bolt 6 is formed of wear-resistant ceramics, it is less worn even when the raw soil is pressed, and the durability is improved.

In the structure of this example, when the raw material soil is replaced when the product numbers are switched, a large number of ceramic parts 6a, 6a, 6a projecting on the inner peripheral surface of each cylinder are arranged in a continuous longitudinal direction. Since the road is formed along with it, when the new raw material soil is extruded, the old raw material soil remaining on the inner peripheral surfaces of the cylinders 2 and 3 is extruded well by the new raw material soil. In addition, the old raw material soil does not remain on the inner wall surfaces of the cylinders 2 and 3, and thus the residual soil is not accumulated on the surface of the new raw material soil as in the conventional case, and a defective product is not formed. The switching can be performed smoothly. In particular, when the product number is frequently changed, the structure of this example is extremely advantageous, and the work loss at the time of replacing the raw materials can be significantly reduced.

Further, in the past, when the liner 52 was worn, it was necessary to periodically replace the liner 52, and the replacement work was extremely troublesome. However, in this example, the protrusion bolts 6 are provided from the outside of the cylinders 2 and 3. , 6 can be adjusted by loosening the nut 7 from the outside and adjusting the amount of insertion into the cylinders 2, 3 from the outside, and when the projection bolt 6 needs to be completely replaced, You can easily remove the bolt 6 and replace it with a new one,
It is not necessary to divide the left cylinder 2 and the right cylinder 3 separately every time as in the conventional case, and the replacement is easy.

Further, each of the protrusion bolts 6, 6, 6
If the insertion amount is automatically adjusted, that is, if the plate member 8 has a structure such that the plate member 8 can be freely attached to and detached from the mounting plane portion 4 by a clamp device or the like (not shown), the raw material soil can be switched. At this time, if each projection bolt 6 is pulled out through the plate material 8 and there is no projection on the inner peripheral surface of each cylinder 2 and 3, and if a new raw material soil is pushed out by the auger screw S, the old raw material soil is completely removed. Can be removed, the old raw material soil can be removed more reliably, and the replacement work of the raw material soil can be performed extremely smoothly. The structure of the body portion 1 in this example can be applied not only to clay but also to an extruder such as rubber or resin, and the raw materials can be replaced smoothly.

[0012]

Industrial Applicability The present invention relates to an extrusion molding machine in which an auger screw is rotated in a body portion and the raw material is pressed against the inner wall of the body portion in the axial direction of the auger screw, and a cylindrical protrusion is formed on the inner wall of the body portion. By providing a large number of protrusions, good resistance can be obtained due to the large number of protrusions when the raw material is extruded, and when exchanging the raw material, a continuous path is formed between the large number of protrusions along the extrusion direction. Therefore, the old raw material can be satisfactorily extruded by the new raw material, the old raw material does not remain and defective products are less likely to occur as in the conventional case, and the effect of exchanging the raw material very well Have. Further, since the protrusion is formed of a bolt, and the bolt is inserted inward from the outside of the body portion, the amount of each bolt inserted from the outside of the body portion can be appropriately adjusted.
Further, each bolt can be exchanged from the outside of the body portion, and there is an effect that replacement work can be performed very easily without disassembling the body portion. In addition, since the outer periphery of the protrusion on the inner end side is surrounded by the ceramics, the ceramics having high abrasion resistance has an effect of extremely improving the durability. Also, by mounting a plurality of the bolts on the plate material in advance and fixing the plate material to the outer peripheral surface of the body portion, a plurality of bolts can be simultaneously mounted on the body portion through the plate material. This has the effect of making replacement and the like easier.

[Brief description of drawings]

FIG. 1 is a half cross-sectional configuration diagram of a body portion of an extruder.

FIG. 2 is an external perspective configuration diagram of a body portion.

FIG. 3 is a perspective configuration diagram of an inner peripheral surface of a cylinder forming a body portion.

FIG. 4 is a perspective configuration diagram of a plate member having a plurality of protruding bolts attached to the outside of the body portion.

FIG. 5 is a perspective configuration diagram of a protrusion bolt.

FIG. 6 is a schematic perspective configuration diagram of a conventional auger screw arranged in a body portion.

FIG. 7 is a perspective view of a conventional liner attached to the inner peripheral surface of a body.

[Explanation of symbols]

 1 Body 2 Left Cylinder 3 Right Cylinder 2a, 3a Joint Flange 4 Placement Flat 5 Insertion Hole 6 Projection Bolt 6a Ceramics 7 Nut 8 Plate S Auger Screw

Claims (4)

[Claims] 1. An extruder in which an auger screw is rotated in a body portion to push a raw material in the axial direction of the auger screw while pressing the raw material against the inner wall of the body portion, and a large number of columnar protrusions are provided on the inner wall of the body portion. An extrusion molding machine characterized in that 2. The extruder according to claim 1, wherein the protrusion is formed of a bolt, and the bolt is inserted inward from the outside of the body portion. 3. The extrusion molding machine according to claim 1, wherein the outer periphery of the protrusion on the inner end side is surrounded by ceramics. 4. The extrusion molding machine according to claim 2, wherein a plurality of the bolts are attached to a plate member in advance and the plate member is fixedly mounted on the outer peripheral surface of the body portion.