JPH0118194Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a crusher for crushing materials such as plastics.

(Prior art) As this type of crusher, for example,
Those described in Publication No. 35401, Publication of Utility Model Publication No. 54-39164, etc. are known.

The above conventional one has a material inlet at the top,
A rotary cutter is rotatably provided in a housing having a discharge port at the bottom, the upper part of the rotary cutter communicates with the material introduction port, and the lower part thereof is covered with a screen-type classification means and separated from the discharge port, Further, fixed cutters facing the outer periphery of the rotary cutter are provided below the left and right sides of the material introduction port.

In the above-mentioned conventional crusher, in order to facilitate attachment and detachment of the screen, the screen covers the outer periphery of the lower surface of the rotary cutter within a range of 180° or less from the axis of the rotary cutter. That is, if the screen is provided over a range of 180° or more, it will not be possible to attach the screen along the outer periphery of the rotary cutter unless it is inserted and removed in the axial direction of the rotary cutter. Such axial insertion/removal cannot be adopted because if the jam occurs, it will not be possible to remove it.

(Problem to be solved by the invention) By the way, the above-mentioned screen-type classification means causes the crushed material that has been crushed to a predetermined particle size to fall from the screen, and those larger than the predetermined particle size are retained on the screen and taken away with a rotary cutter. It serves the purpose of rotating it and pulverizing it again between the fixed cutters.
If this classification means is provided only in a narrow range, the particles that have been crushed to a predetermined particle size will be taken around by the rotary cutter and crushed again before they completely fall, which will reduce the variation in particle size. growing.

Therefore, it is desirable that this classification means be provided over as wide a range as possible.

However, for the above reasons, it was only provided within a range of 180° or less.

Therefore, in this invention, the lower side of the rotary ivy
It is an object of the present invention to provide a pulverizer which is equipped with a screen-type classification means that can cover a wide area of 180° or more, and which can be extremely easily attached and detached.

(Means for solving the problem) In order to achieve the above object, the present invention takes the following measures. That is, the feature of the present invention is that a rotary cutter 23 is rotatably provided in a housing 18 having a material inlet 20 at the upper part and a discharge port 35 at the lower part, and the upper part of the rotary cutter 23 is vertically disposed. The lower part thereof is covered with a screen-type classification means 28 and is separated from the discharge port 35 that penetrates in the vertical direction, and is located above the center of rotation of the rotary cutter 23. In this crusher, fixed cutters 27 are provided on both left and right sides of the rotary cutter 23, and the lower outer circumference of the rotary cutter 23 extends over a wide range of 180° or more around its axis. An opening/closing fulcrum shaft 3 which is covered by the classification means 28 and is parallel to the axis of the rotary cutter 23 is located approximately at the center in the circumferential direction along the lower outer peripheral surface of the rotary cutter 23.
1 is installed horizontally, and the classifying means 28 is divided into left and right sides via the opening/closing fulcrum shaft 31, and each classifying means 28
The lower end of each classification means 28 is rotatably supported on the opening/closing fulcrum shaft 31, and the upper end of each classification means 28 is connected to the discharge port 3.
The fixed cutter 27 is detachably fixed to the housing 18 so as to overlap the lower surface of the fixed cutter 27 exposed on the 5 side.

(Function) According to the present invention, a material such as plastic is introduced from the material inlet formed in the upper part of the housing. The input material is pulverized by a rotary cutter rotating below the material inlet and a fixed cutter fixed to the upper part of the housing.
The crushed material falls downward, but is caught by a screen-type classification means that covers the lower surface of the rotary cutter, and those smaller than the sieve openings of the classification means pass through the sieve openings and fall downward. Items larger than the sieve mesh of the classifying means are carried around by the rotation of the rotary cutter and crushed again by the fixed cutter, after which they pass through the classifying means and are discharged from the discharge port.

According to the present invention, the screen-type classifying means covers the lower surface of the rotary vine over a wide area with a central angle of 180° or more, so the crushed material passes over the sieve of the classifying means over a long distance. Because of the movement, materials smaller than the sieve mesh can be reliably passed through the classification means, and unnecessary entrainment does not occur, reducing variation in particle size.

On the other hand, if a jam or the like occurs in the crusher and it is necessary to release the lower side of the rotary cutter, the following procedure is performed.

That is, the screen-type classifying means that covers a wide area of 180 degrees or more over the lower outer peripheral surface of the rotary cutter is divided into left and right parts via an opening/closing fulcrum shaft in the center, and the lower end of each classifying means is connected to the opening/closing fulcrum shaft. The upper end of each classification means is rotatably supported on the shaft, and the upper end of each classification means is detachably fixed to the housing. By rotating the means, the lower surface side of the rotary cutter can be released.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

What is shown in FIGS. 1 and 2 is an overall view of the apparatus when the crusher according to this invention is incorporated as a secondary crusher A. 1 is a primary pulverizer, 2 is its suction blower, and the pulverized material is forcibly sucked into the primary cyclone 3 on the secondary pulverizer A through appropriate piping, and introduced into the stock tank 4 at the bottom of the cyclone 3. In this case, a level meter 5 is installed in the stock tank 4, which communicates with the primary crusher 1 to temporarily stop the crushing drive when the amount stored therein becomes excessive. 6 is a warning light which is one means for stopping the operation, and other means are also possible. A primary dust collector 7 is connected to the primary cyclone 3 and stock tank 4.

An electromagnetic feeder 8 is attached to the lower end of the stock tank 4 to supply material to the secondary crusher A.

The secondary crusher A is equipped with a motor cover 10 on one side of a pedestal 9, and a crushing motor 11 inside the motor cover 10, as shown in the overall outline in FIGS. 3 to 5.
The pulverizer is driven by a transmission part 12, and when the supplied material is pulverized, it is passed through a discharge duct 13 and a take-out duct 14 provided at the bottom of the pulverizer A to a suction blower 2. Then, it is forcibly transferred to the secondary cyclone 15. Cyclone 1
A secondary dust collector 16 is also connected to the cyclone 5, and finely pulverized material is taken out from the secondary cyclone 15 in this way.
Note that 17 indicates an air filter.

The entire pulverization processing equipment is configured as described above, but next is the (secondary) pulverizer A, which is the main part.
I will explain about it.

The crusher A is shown in FIGS. 6 to 8,
That is, 18 is a housing, which is integrally formed with a pair of left and right housing side parts 19 and a housing upper part 21 having a material inlet 20 extending therethrough. Bearing means 22, 22 are fitted into both sides 19 of the housing 18, and a rotary cutter 23 is mounted via the bearing means 22. This rotary cutter 23 has a rotating body 25 on the outer periphery of the main shaft 24.
is fitted onto the outside, and a blade 26 that can be moved forward and backward is attached to the star-shaped outer periphery.

The fixed cutter 27, on the other hand, is disposed symmetrically with respect to the inclined bottom surface of the housing upper part 21, and is configured to be freely adjustable forward and backward with its cutting edge facing toward the axial center of the rotary cutter 23. Its position is slightly higher than the axial center of the rotary cutter 23.

In this way, the lower side of the fixed cutter 27 is made open, and a screen-type classifying means 28 is provided here. This classification means 28 is a rotary cutter 23
It is provided over a wide range of 180 degrees or more with the axis of the center as the central angle.

This classification means 28 has an arc-shaped receiving frame 29 extending from the height of each fixed cutter 27 to the bottom of the rotary cutter 23 and a screen 30 attached to the inner periphery of the frame 29. In the figure, the rotary cutter 23 is of a left-right split type, and is swingable to open and close around an opening and closing fulcrum shaft 31 provided horizontally at the bottom of the rotary cutter 23. In this case, the lower end horizontal mounting plate 32 of the receiving frame body 29
are detachably fixed to each other, while the upper end horizontal plate 33 is also detachably fixed to the bottom surface of the housing upper part 21, and a first handle 34 is also attached for opening and closing.

That is, the upper end horizontal plate 33 is fixed to the lower surface of the fixed cutter 27 in an overlapping manner.

Reference numeral 35 denotes a discharge port, and the discharge port 35 is formed vertically through the lower part of the housing 18. The lower outer peripheral portion of the rotary cutter 23 and the discharge port 35 penetrating in the vertical direction are separated by a screen-type classification means 28.

A pair of exterior chute covers 36, 36 are provided before and after the discharge port 35, and this cover 36 has a structure in which it is opened and closed by a second handle 37 with its lower end as a pivot point, and when closed, an internal chute portion 38 is opened. By forming a downwardly tapered guide space S, it serves as a guide for the pulverized material.

In addition, the opening/closing fulcrum shaft 31 and the fulcrum boss 40 are disposed at the bottom portion of the classification means 28, which is just a dead space, and the lower end horizontal plate 32 is constructed as one section guide wall, etc. We have reached the point where it can be made more efficient.

In this example, individual inspection and maintenance of the rotary cutter 23, fixed cutter 27, classification means 28, etc.
The classification means 28 with the lower end of the classification means 28 as a fulcrum
Not only can opening and closing be carried out in an extremely light and quick manner, but also clearance adjustment can be carried out very efficiently.

It should be noted that a plurality of the fulcrum bosses 40 are provided on the opening/closing fulcrum shaft 31 so that the classifying means 28 can be opened and closed to the left and right. Also, as shown in Figure 7, the fulcrum boss 4
Since the bottom of the tube 0 forms a slight dead space, a temperature sensor 41 is placed there to control the amount of material supplied. One control system in this case will be explained with reference to FIG. 9. Reference numeral 42 is a material supply and transportation device, which is a table type feeder with a stirring function and feeds the material sequentially.
This device 42 and the temperature sensor 42 of the pulverizer A are in a responsive relationship, so that, for example, the pulverization status can be detected by three temperature classifications of strong and weak, and the supply amount can be determined by the action of the electrical conversion means in accordance with the pulverization status. The system is configured to control (including stop) the Note that 4 shown in Figure 9
3 is a cyclone, and 44 is a dust collector.

(Effect of the invention) According to the invention, a pair of screen-type classification means are rotatably provided on the fulcrum shaft provided below the rotary vine, and the lower surface side of the rotary vine is spread over a wide range with a central angle of 180° or more. Since the pulverized material is constructed so as to cover the pulverized material, the distance over which the pulverized material can be passed over the screen of the classification means is increased, the passage of the material through the screen is ensured, and the variation in particle size is reduced.

In addition, the lower surface of the rotary cutter can be released by simply rotating the screen-type classification means around the fulcrum axis, making the release work easier.
Not only inspection work but also clearance adjustment between the rotary cutter and fixed cutter and other internal work can be carried out easily and safely.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the entire pulverization processing apparatus which is an example of this invention, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged front view of the pulverizer, and Fig. 4 is its right side view. Figure 5 is a plan view of the pulverizer, Figure 6 is a vertical sectional view showing the internal structure of the pulverizer, Figure 7 is a sectional view taken along the line 7, Figure 8 is an enlarged plan view of the pulverizer, and Figure 9 is another pulverizer. It is a front view showing an example. 18...Housing, 20...Material inlet, 2
3...Rotary cutter, 27...Fixed cutter, 2
8...Screen type classification means, 31...Opening/closing fulcrum shaft, 35...Discharge port, A...Crusher.

Claims (1)

[Claims for Utility Model Registration] It has a material inlet 20 at the top and a discharge port 3 at the bottom.
Rotary cutter 2 in housing 18 having 5
3 is rotatably provided, and the rotary cutter 23
The upper part of the material inlet 20 penetrates in the vertical direction.
The lower part of the same is connected to a screen-type classification means 28.
A fixed cutter 27 is provided on both left and right sides of the rotary cutter 23, which is partitioned from the discharge port 35 that is covered with and penetrates in the vertical direction, and is located above the rotation center of the rotary cutter 23. In the crusher, the lower outer periphery of the rotary cutter 23 is covered by the classifying means 28 over a wide range of 180° or more around its axis, and the lower outer periphery of the rotary cutter 23 is covered with An opening/closing fulcrum shaft 3 parallel to the axis of the rotary cutter 23 is located approximately in the center of the direction.
1 is installed horizontally, and the classifying means 28 is divided into left and right sides via the opening/closing fulcrum shaft 31, and each classifying means 28
The lower end of each classification means 28 is rotatably supported on the opening/closing fulcrum shaft 31, and the upper end of each classification means 28 is connected to the discharge port 3.
A crusher characterized in that the fixed cutter 27 is detachably fixed to the housing 18 so as to overlap the lower surface of the fixed cutter 27 exposed on the 5 side.