JPS6129476Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to improvements in rotary shear crushers.

Typically, a rotary shear crusher has a pair of fixed blades protruding from opposing parts of the crushing chamber surrounded by a casing, while the blades are mounted on a rotating main shaft that is rotatably supported in the crushing chamber. A rotary blade is attached to the table, and pulverized materials such as film, runners, plastic scraps such as defective molded products, and industrial waste materials are input from the material input port of the crushing chamber, and the rotary blade and fixed blade are separated by rotation of the rotating main shaft. The combined shear force is used to crush the material. During this pulverization, a torsion angle is provided between the cutting edges of the rotary blade and the fixed blade so that the load is not applied to the rotary blade and the fixed blade all at once, and to facilitate sharp cutting of the pulverized material. It was constructed so that it could be cut gradually using a scissor effect. Conventionally, when creating a torsion angle on the fixed blade side, the torsion angle is formed by machining the mounting seat on the crusher body into an inclined shape, or by machining the entire fixed blade into an inclined shape. Ta. Therefore, it has the disadvantage that processing is difficult and requires a lot of time. Additionally, the fitting parts of the crusher bodies and the fitting parts of the upper main body and the screen pedestal are assembled in an inclined manner, making it difficult to process and assemble them. It was hot. On the other hand, when taking a torsion angle on the rotary blade side, the mounting seat of the blade mount on the main spindle must be machined into an inclined shape, and after the rotary blade is installed, the outer circumference must be cylindrical polished to maintain a constant clearance with the fixed blade. The drawback was that it required a lot of time for processing, such as not being able to maintain a high temperature.

Therefore, in view of the above-mentioned problems, the present invention has a simple structure with a twist angle on the fixed blade side, which facilitates the manufacture of the crusher. A rotary shearing pulverizer equipped with a rotary blade provided on a rotary main shaft rotatably supported by a rotary blade, and a fixed blade protruding into a pulverizing chamber to crush the pulverized material in cooperation with the rotary blade. In the machine, the fixed blade has upper and lower surfaces parallel to each other and has a fixed blade main body fixed in the axial direction of the rotating main shaft, and a fixed blade main body provided along the longitudinal direction of one side of the main body and inside the crushing chamber. The cutting edge has a protruding cutting edge, and the rake face of the cutting edge is inclined along the longitudinal direction of the cutting edge with respect to the upper and lower surfaces.

Hereinafter, embodiments of the present invention will be described based on the drawings. In FIG.
A crushing chamber 4 having a circular cross section is formed surrounded by a lower body 3 and a lower body 3. The upper part of the crushing chamber 4 serves as an input port 5, which communicates with a hopper (not shown). The upper main body 2 and the lower main body 3 can be firmly fastened and released by a pair of fastening mechanisms 6, and the upper main body 2
can be opened and closed with respect to the lower body 3.

Reference numeral 8 denotes a screen pedestal, which is attached to the lower body 3 by a pair of fastening mechanisms 9, and is configured so that when one fastening mechanism 9 is removed, it can be opened to the lower body 3 around the fulcrum of the other fastening mechanism 9. has been done. The screen pedestal 8 is equipped with a screen 10 having a semicircular cross section on its upper part, and the screen 10 closes the lower part of the grinding chamber 4, and a large number of particle size regulating holes 11 are formed in the screen 10. ing.

Reference numeral 12 denotes a rotating main shaft, which penetrates through the axial center of the crushing chamber 4 and is rotatably supported, and is rotatably driven by a drive mechanism (not shown). Also, the rotating main shaft 1
2 has a plurality of blade mounting bases 1 spaced apart appropriately in the axial direction.
3 is integrally provided, and in this embodiment, three rotary blades 14 are hung from each other on mounting seats on the outer periphery of the blade mount 13 and fastened with bolts 15. Further, the amount of protrusion of the cutting edge portion 17 of the rotary blade 14 can be adjusted by moving the adjustment bolt 16 forward or backward.

A pair of left and right opposing fixed blades 18 are provided on the joining surface of the upper body 2 and the lower body 3, extending over the entire length of the crushing chamber 4 in the axial direction and parallel to the axial center. A cutting edge portion 19 of the fixed blade 18 projects into the crushing chamber 4. In the illustrated example, one fixed blade 18 is fastened to the mounting seat of the lower body 3 with bolts 21 so that its rake face 20 (see FIG. 2) faces upward, and the other fixed blade 18 faces downward. has been done. Further, the amount of protrusion of the fixed blade 18 into the crushing chamber 4 can be adjusted by moving the adjustment bolt 22 forward or backward.

As shown in FIGS. 2 to 5, the fixed blade 18 is formed into an elongated plate shape, and has a fixed blade main body 23 attached and fixed to the lower main body 3, and a fixed blade main body 23 along one side of the main body 23 in the longitudinal direction. It consists of a cutting edge portion 19 that is provided vertically. The fixed blade main body 23 has an upper surface 24 and a lower surface 25 parallel to each other, and the upper surface 24
A bolt insertion hole 26 through which the bolt 21 passes is formed across the lower surface 25. The rake face 20 of the cutting edge portion 19 is formed in an inclined shape with respect to the upper surface 24 and the lower surface 25 along the longitudinal direction of the cutting edge portion 19, and forms an appropriate twist angle A as shown in FIG. . Furthermore, as shown in FIGS. 3 and 4, a lateral clearance angle B and a front clearance angle C are formed as appropriate. As shown in FIG.
9 projects into the crushing chamber 4. Here, the cutting edge of the cutting edge 17 of the rotary blade 14, which is oriented in the axial direction of the rotating main shaft 12, and the cutting edge of the cutting edge 19 of the fixed blade 18 intersect with each other at a torsion angle A.

The embodiment of the present invention is constructed as described above, and since the cutting edge of the rotary blade 14 and the cutting edge of the fixed blade 18 intersect with each other at a torsion angle A, the so-called scissor effect prevents the sharpness of the pulverized material. Cutting can be done easily. In configuring this torsion angle A, since the configuration is obtained only by forming the rake face 20 of the cutting edge portion 19 of the fixed blade 18 in an inclined shape with respect to the upper surface 24 and lower surface 25 of the fixed blade main body 23, There is no need for any special machining or assembly such as slope machining on the crusher body side, that is, the upper body 2, the lower body 3, the screen pedestal 8, etc., and the manufacture of the crusher body can be facilitated. In addition, since only the cutting edge portion 19 of the fixed blade 18 is machined into an inclined shape, the processing efficiency is better compared to the case where the entire blade is machined into an inclined shape.
It has a simple configuration and can be easily manufactured.

In addition, the rake faces 19 of the fixed blades 18 fixed to the opposing portions of the crushing chamber 4 so as to face each other are
However, if the rotary blades 14 are installed so as to be inclined in opposite directions with respect to the rotation direction P of the rotary blade 14, the material to be crushed can be prevented from being concentrated on one side in the crushing chamber 4 during crushing as the rotary blade 14 rotates, thereby improving the crushing efficiency.

Furthermore, as shown in FIG. 6, if a plurality of fixed blades 18 are provided in the axial direction of the rotating main shaft 12 and a plurality of rotary blades 14 are provided corresponding to each fixed blade 18, one fixed blade 18 Compared to the case where the fixed blade 18 is damaged, only the damaged fixed blades 18 need to be replaced individually, and the cost of repair and inspection can be reduced and maintainability can be improved. Furthermore, with a single fixed blade 18, the torsion angle A is restricted to some extent, but by configuring a plurality of blades, a variety of torsion angles A can be set, and it is possible to crush the material at a torsion angle A that is suitable for the material to be crushed. , it is possible to improve the grinding efficiency.

Further, as shown in FIG. 7, a pair of fixed blades 18 are provided in the axial direction of the rotating main shaft 12, and both fixed blades 18
If the rake face 20 is formed in a so-called V-shaped inclined shape that descends toward the joint surface with respect to the rotation direction P of the rotary blade 14, the crushed material will flow into the crushing chamber 4.
is guided to the center in the axial direction of the rotary main shaft 12, thereby improving the crushing efficiency and preventing fine powder of the crushed material from entering the shaft support portions at both ends of the rotating main shaft 12. Note that a plurality of pairs of these fixed blades 18 may be arranged in the axial direction.

Furthermore, as shown in FIG.
The rake face 20 may be configured to have a rake angle D. With this configuration, sharper cutting can be easily performed by cooperation with the rotary blade 14.

It should be noted that the configurations of the above embodiments are not limited, and may be combined as appropriate depending on the pulverized material.

As described above, the present invention easily provides a twist angle by forming only the cutting edge of the fixed blade in an inclined shape.
There is no need for any special processing or assembly of the upper body, lower body, screen pedestal, etc., and the production of the crusher can be facilitated. Further, the fixed blade itself has a simple structure and has the advantage of being easily manufactured.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a rotary shear crusher equipped with an embodiment of the present invention, Fig. 2 is a perspective view of a fixed blade in the embodiment of the present invention, Fig. 3 is a plan view of the same, and Fig. 4 is a Figure 3 - Linear view, Figure 5 is Figure 3 -
The line arrow view and FIGS. 6 to 8 are perspective views of fixed blades showing other embodiments. 4...Crushing chamber, 12...Rotating main shaft, 14...Rotating blade, 17...Blade tip portion, 16...Fixed blade, 19...
...Blade tip portion, 20...Rake face, 23...Fixed blade body, 24...Top surface, 25...Bottom surface.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A rotary blade provided on a rotating main shaft rotatably supported in the crushing chamber, and a rotary blade provided protruding into the crushing chamber to crush the crushed material in cooperation with the rotary blade. A rotary shearing crusher comprising a fixed blade, the fixed blade having upper and lower surfaces parallel to each other, and a fixed blade main body fixed in the axial direction of the rotating main shaft, and one longitudinal side of the main body. It is characterized by comprising a cutting edge part provided along the direction and protruding into the crushing chamber, and a rake face of the cutting edge part is formed in an inclined shape with respect to the upper and lower surfaces along the longitudinal direction of the cutting edge part. Rotary shear crusher. 2. A request for registration of a utility model characterized in that the rake faces of the fixed blades fixed to opposing parts of the grinding chamber are inclined in directions opposite to each other with respect to the rotating direction of the rotary blades. The rotary shear crusher according to item 1. 3. The rotary shearing crusher according to claim 1, wherein a plurality of the fixed blades and the rotary blades are respectively provided in the axial direction of the rotating main shaft. 4. A pair of fixed blades are arranged in parallel in the axial direction of the rotary main shaft, and the rake faces of both fixed blades are formed in an inclined shape that descends toward the joint surface of each other with respect to the rotation direction of the rotary blades. A rotary shearing crusher according to claim 1, characterized in that it is a utility model. 5. The rotary shear crusher according to claim 1, wherein the rake face of the fixed blade is formed with a rake angle.