JPS5850993Y2 - Thermoplastic resin extrusion molding machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to an extrusion molding machine for thermoplastic resin, and its purpose is to facilitate the supply of raw resin, suppress excessive heat generation of raw resin during kneading, and improve cross-contact. An object of the present invention is to provide a thermoplastic resin extrusion molding machine configured to perform the above-mentioned extrusion molding.

Hereinafter, the present invention will be explained in detail based on embodiments shown in the drawings.

The main body 1 of the extrusion molding machine is constructed by assembling a lower main body 2 and an upper main body 3 with bolts 4.
semi-cylindrical grooves 2a, 3a formed on the joint surface between the upper body 3 and the upper body 3;
A horizontal hole 6 is formed in which the screw 5 is rotatably housed, and a hollow hole is formed in the center of the horizontal hole 6 extending from the lower body 2 to the upper body 3 with the hole axis as the center. The shape is a conical rotating plate storage chamber 7.

A central hole 2 of a conical plate 8 whose wall thickness gradually decreases outward from the center is provided in the shaft portion of the screw 5 passing through the storage chamber 7.
9 is fitted and fixed, so that the conical plate 8 rotates integrally with the screw 5 within the storage chamber 7.

The conical plate 8 has a large number of spiral protrusions 10, 11 in opposite directions on the left and right slopes 8a, 8b, and has a raw material supply opening into the storage chamber 7 formed in the upper body 3. The raw resin supplied from the port 9 is transferred along the left and right slopes 8a, 8b in the direction of the rotation center axis of the conical plate 8 by the protrusions 10, 11.

The screw 5 is formed by forming threaded protrusions 12 and 13 with opposite threads on the left and right shaft portions of the conical plate 8.
Furthermore, reverse threads 14.15 are formed at positions outside of these threaded protrusion openings 12.13.

A bearing body 16.17 is fastened to the left and right openings of the horizontal hole 6 in the body part 1 with bolts 18, and the roller bearings 19 and 20 provided in the bearing body 16.17 are screwed together. Both left and right ends of 5 are rotatably supported.

The sprocket 21 is attached to an outwardly protruding portion of the roller bearing 20 of the screw 5, and rotation is transmitted to the screw 5 via the chain and the sprocket 21 from a motor (not shown).

Pipe joints 24 and 25 connect openings at both left and right ends of holes 26 that pass through the central axis of screw 5 to fixed pipes 22 and 2.
It is connected to 3.

A resin passage 27 formed in the lower body 2 and having an outwardly inclined upper part.
．． The upper end of 28 opens into the horizontal hole 6 at the outer part of the threaded ridge 12.13 of the screw 5, and the lower end thereof opens to the outside.

When starting the extrusion molding machine of the present invention, one of the fixed tubes 2
2, heated oil is circulated through the other fixed tube 23 through the hole 26 formed in the screw 5 to preheat the main body 1.

Next, drive the motor (not shown) and drive the sprocket 21.
When the screw 5 is rotated through the screw 5, the resin raw material supplied from the raw material supply port 9 is divided into both slopes of the conical plate 8, and is kneaded by the spiral protrusions 10°11 while being rotated. It is transferred along the left and right slopes in the direction of the screw 5, and reaches the horizontal hole 6 from the storage chamber 7.

In this way, the raw resin supplied to the supply port 9 is transferred to the spiral protrusions 10 and 11 formed on the left and right slopes of the conical plate 8.
Since the resin is transferred along the slopes on both sides in the direction of the rotation center, the resin path becomes longer than when spiral protrusions are formed on both sides of a disk whose both sides are parallel. Moreover, since the molten resin is not compressed suddenly, the molten resin is not overheated, and problems such as deterioration are solved.

Further, since the conical plate 8 has a thickness that gradually decreases outward in the radial direction, it has excellent strength.

The molten resin that has reached the horizontal hole 6 is further kneaded by the threaded protrusions 12 and 13 and transferred outward inside the horizontal hole 6, and then flows through the passage 2.
7. Extruded to the outside from 28.

Further, by reversing the rotation of the screw 5, the passage 27.2
The resin raw material may be supplied from 8 and extruded from the supply port 9 in the reverse route to the above.

As is clear from the above description, according to the extrusion molding machine of the present invention, the thickness of the rotary disk is gradually reduced in the radial direction outward from the central axis of rotation, and the thickness is gradually reduced in the opposite direction. Since the coiled protrusions are formed, (1) the resin crosstalk path is substantially extended, improving the crosstalk effect;

(2) When resin is transferred from the outer periphery of the disk toward the center of rotation, there is no sudden compression, so problems such as deterioration of the resin due to overheating do not occur.

(3) Since the outer circumferential edge of the disk is thin, the raw resin can be easily supplied from the outer circumference of the disk, and can be divided and transferred evenly to both slopes.

(4) The strength of the disk itself is improved, helping to reduce the overall size.

It has excellent features such as

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view showing an embodiment of an extrusion molding machine according to the present invention, and FIG. 2 is a sectional view taken along the line II-II. 1... Main body, 2... Lower main body, 2a
... Semi-cylindrical groove, 3 ... Upper body, 3a
...Semi-cylindrical groove, 4...Bolt, 5...
...Screw, 6...Horizontal hole, 7...
... Rotating plate storage chamber, 8... Conical plate, 8 a
, 8 b...Slope, 9... Raw material supply port, 10.11... Thinly wound protrusion, 12, 13
...Thread protrusion, 14, 15... Reverse thread, 16, 17... Bearing body, 18...
...Pol), 19.20...Coro bearing, 21
...Sprocket, 23,23...Fixed pipe, 24.25...Pipe fitting, 26...
- Hole, 27.28...Resin passage.

Claims (1)

[Scope of utility model registration request] A large number of thinly wound protrusions in opposite directions are formed on both side slopes of a rotating disk whose thickness is gradually decreased radially outward from the central axis of rotation, and the rotating disk has a contour that is approximately the same as that of the rotating disk. By installing the rotary disk in a disk storage chamber having a hollow portion so as to be able to rotate in a desired direction, the raw material supplied to both sides of the rotating disk can be moved along both side slopes of the rotating disk toward its center of rotation or toward its center of rotation. A thermoplastic resin extrusion molding machine characterized in that the thermoplastic resin is transferred in the outer circumferential direction.