JPS6028511Y2 - Crusher - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pulverizer for pulverizing resin molded articles.

The crusher is equipped with a rotating blade and a fixed blade opposing the rotating blade in the crushing chamber, and an arc-shaped crimp net is stretched below the rotating blade, and the resin pieces crushed by the rotating blade and the fixed blade are set on the crimp net. When the resin pieces are crushed to a size that can pass through the crimped mesh, the resin pieces are dropped downward through the crimped mesh.

For this purpose, the size of the resin pieces is determined by the size of the crimp mesh, but if the mesh is too large,
Slender molded objects such as spools and runners produced during resin injection molding pass through the mesh with their length roughly cut into pieces, and these relatively long pieces of resin must be crushed again, resulting in a second It is time consuming.

Furthermore, in order to prevent such a situation, if the mesh of the crimp net is made finer, the resin pieces become too fine and become powdery.

Therefore, the object of this invention is to provide a pulverizer that can pulverize even elongated molded objects such as the aforementioned spools and runners into a predetermined size without turning them into powder.

This invention is a crusher in which a rotating blade and a fixed blade opposing the rotating blade are installed in the crushing chamber, and an arc-shaped crimp net is stretched below the rotary blade, and the above-mentioned rotation within the mesh of the crimp net is It is characterized by a stepped portion formed on the rotational direction side of the blade.

According to this invention, when an elongated molded object passes through the mesh of the crimp mesh, the tip gets caught on the stepped part of the mesh, preventing the object from passing.In this state, the rotary blade cuts the object, and at the same time, when cutting Due to the vibration, the resin pieces that were caught on the step part can be detached from the step part and fall down.This allows the resin pieces to be reliably crushed to the specified size without passing through the elongated molded object even if the mesh is enlarged. Can be done.

An embodiment of this invention having such characteristics will be described in detail below based on the drawings.

The drawings show a crusher for crushing resin molded products, and in Figures 1 and 2, the crusher 1 is composed of an upper hopper 2, a crushing chamber 3 in the center, and a lower base 4. .

The above-mentioned hopper 2 is formed with an input port 5, and this input port 5
is provided with a horizontal lid 6 that closes the upper part and a vertical lid 7 that opens and closes the vertical side, one end of the horizontal lid 6 is pivotally attached to the hopper 2, the other end is bolted to the hopper 2, and the upper side It is formed so that it can be opened when loading from the container.

The vertical lid 7 has an upper end pivotally connected to the hopper 2 and can be opened inwardly, and a lower end abuts against the inner wall of the hopper 2.

A lever 8 for opening and closing is attached to the outer surface of the vertical lid 7.

A saucer 9 connected to the input port 5 is provided on the front side of the vertical lid 7, and by placing the resin molded product to be crushed on the tray 9, opening the vertical lid 7, and pushing it in, The resin molded product is put into the hopper 2.

A rotary shaft 10 rotated by a motor or the like is installed inside the above-mentioned crushing chamber 3 via bearings 11, 11, and a rotary blade 12 is fixed to this rotary shaft 10.

Note that the above-mentioned rotary blade 12 is constructed by superposing a plurality of narrow rotary blades into a predetermined wide rotary blade 12.

Further, support members 1 protruding from opposing inner wall surfaces of the crushing chamber 3
3.13 includes a fixed blade 14 facing the above-mentioned rotating blade 12.
14 is fixed, and the fixed blade 14.14 is configured to crush and cut the resin molding by using the above-mentioned rotary blade 12.

An arc-shaped crimp net 15 is located at the lower part of the rotary blade 12 and close to it, and this crimp net 15 is fixed to a support frame 16, and one end edge of the support frame 16 is connected to one support by a shaft 17. The member 13 is pivotally attached to the lower side of the support frame 13 so as to be openable and closable, and the other end edge of the support frame 16 is formed with an abutting part 18 whose lower side has a V-shaped cross section. The crimp net 15 is fixed by being pressed and fixed to the lower surface side of the other supporting member 13.

An operating shaft 21 having an eccentric cam 20 fixed to its inner end is supported on the front wall 19 facing the abutting portion 18 of the support frame 16 so as to be slidable and rotatable in the front and rear directions. An operating lever 22 is fixed to the end.

The outer circumferential portion of the eccentric cam 20 is formed into a chevron shape that matches the shape of the abutting portion 18, and when the eccentric cam 20 is aligned with the abutting portion 18 and rotated, the eccentric cam 20 bites into the abutting portion 18. The contact portion 18 is pressed and fixed to the lower surface of the support member 13.

Note that the operating shaft 21 is locked in the fixed position by an appropriate locking mechanism such as a ratchet pawl mechanism.

To release the fixation of the support frame 16, rotate the operation lever 22 to release the eccentric cam 20 from biting in, and pull the operation lever 22 forward, so that the eccentric cam 20 comes into contact with the support frame 16. The support frame 16 is moved forward from the portion 18, and the contact portion 18 side of the support frame 16 is moved by its own weight, and the crimp net 15 is released.

The lower discharge port 23 of the above-mentioned crushing chamber 3 opens on the upper surface of the base 4, and a receiving box 24 is housed inside the base 4 so as to be freely put in and taken out, and receives the crushed resin pieces.

FIG. 3 shows the crimp net 15 described above.
A stepped portion 26 is formed in each of the meshes 25 on the rotational direction side of the rotary blade 12 described above.

The above-mentioned stepped portion 26 is formed by drilling the mesh 25 from the upper surface side of the crimp mesh 15 to the mid-thickness position using a drill, and then drilling the center of the mesh 25 from the lower surface side slightly from the upper surface side in the predetermined direction mentioned above. It is formed by shifting the position and penetrating it at the middle position of the wall thickness, and the amount of the step part 26 is formed to such an extent that the resin piece is slightly caught.

In the crusher 1 configured in this way, when a resin molded product is charged into the input port 5 of the hopper 2, it is crushed by the rotary blade 12 and the fixed blades 14, 14, and the crushed resin pieces are transferred to the crimp net 15. The lower receiving box 2 is crushed through the crimp net 15 by being crushed to a size that can pass through the crimp net 25.
4 is accepted.

When the aforementioned resin molded product is an elongated molded piece 27 such as a spool or a launch, the molded piece 27 enters the mesh 25 of the crimp net 15 in order to pass through the mesh 25 of the crimp net 15 without being finely pulverized by the rotary blade 12. and its tip is a stepped portion 26
The rotary blade 1 is caught in this state and blocked from passing.
2 cuts this, and at the same time the step part 26 is cut due to the vibration during cutting.
The resin piece caught in the step part 26 can come off and fall.

As a result, even elongated molded pieces can be crushed into a predetermined size without passing through the mesh 25.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a vertical cross-sectional front view of the crusher. FIG. 2 is a longitudinal cross-sectional side view. FIG. 3 is a partially sectional front view of the crimp net. 1...Crushing machine, 3...Crushing chamber, 12.
...Rotating blade, 14...Fixed blade, 15...
...Crimp net, 25...Mesh, 26...
...Danbe.

Claims (1)

[Scope of Claim for Utility Model Registration] A pulverizer in which a pulverizing chamber is provided with a rotating blade and a fixed blade opposing the rotating blade, and an arcuate crimp net is stretched below the rotary blade, the pulverizer comprising: A pulverizer characterized in that a stepped portion is formed on the rotation direction side of the rotary blade.