JPH08318150A - Structure of die for granulator of disk type - Google Patents

Abstract

PURPOSE: To make it possible to prolong the life of a costly first die part having high wear resistance to the twice longer life and to allow the continuous use of a second die part as both the front and rear surfaces of the first die part are usable. CONSTITUTION: The die 2 is formed of the double structures composed of the first die part 21 and the second die part 22. The first die part 21 is formed of steel products having the high wear resistance as its blank and plural large- diameter insertion holes 211 are formed in this die part. Plural small-diameter insertion holes 221 exist in the second die part 22 in positional relations corresponding to the insertion holes 211 of the first die part 21. The first die part 21 may be separated from the second die part 22 and may be fastened to the second die part by turning over the first die part upside down.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a die in a disk type granulator which grinds and granulates industrial waste.

[0002]

2. Description of the Related Art Conventionally, a disk type (grinding type) granulator grinds and crushes a granulating raw material by means of a die and a roller rolling on the die, and the granulating raw material is granulated in the die. The granules are pressed into the through holes for granulation and granulated. This die is made of an expensive material in which a steel material is hardened to improve wear resistance, and is a flat donut shape. The structure of this conventional die will be described with reference to FIG. 4. The die 20 has a plurality of granulation insertion holes 201 ... It is ground and pressed into this insertion hole for granulation. The internal shape of the granulation insertion hole 201 is such that the upper half has a large diameter, and in particular, the upper opening end face 201a has a tapered opening, and the lower half has a small diameter. A plurality of roller spindles are radially provided on the spindle that passes through the mounting holes 212, and the rollers are rotatably supported at the respective tips of the roller spindle.
This point is the same as the configuration of FIG. Therefore, the granulation raw material can be smoothly pushed in from the large-diameter upper surface opening of the insertion hole 201 of the die 20 by the roller, and is further subjected to a strong compression action in the lower diameter portion of the lower half of the insertion hole to be granulated. It has become so.

[0003]

However, the contact surface between the roller and the die 20 is gradually abraded due to friction with this roller over time, and the pressing force of this roller is reduced as the wear increases. Then, the granulation raw material is dies 20
The force of pushing into the insertion hole 201 is decreased. Particularly, when a gap is generated between the roller and the die 20 due to the progress of wear, the pressing force (compressive force) by the roller is extremely reduced, and the granulation work efficiency is extremely reduced. Therefore, the dice
It will need to be replaced with another new one. But,
This die is expensive because it is made of a material having excellent wear resistance, which affects the manufacturing cost and the granulation cost of the die. Therefore, the inventors of the present application first examined the possibility of re-using the die by turning it upside down, but the shape of the opening of the insertion hole 201 is different between the upper surface and the lower surface of the die. This inversion cannot be used with dice.

Therefore, the present invention provides a disk type granulator which is effective in reducing the manufacturing cost of the die and the cost required for granulation by reversing the necessary portion of the die to extend the life of the die. Especially.

[0005]

A feature of the present invention is that a die 2 is fixedly installed by abutting against a first die portion 21 pressed by a roller and a lower surface of the first die portion. The first die part is formed of a material having high abrasion resistance, and the through hole for granulation is formed in the vertical direction. An insertion hole 221 for granulation having a smaller diameter than that of the insertion hole 211 is formed in the 2 die portion in a positional relationship corresponding to the insertion hole, and each insertion hole of the first die portion is In the communicating state with the respective insertion holes of the second die portion, both are integrally connected, and the first die portion is separable from the second die portion and is turned upside down to form the second die portion. It can be connected.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In the granulator shown in FIG. 1, a cylindrical main body frame 1 is erected, and a donut-shaped die 2 is fixedly installed on the inner wall of the main body frame. As is well known, the die 2 has a plurality of insertion holes 211 and 221 for granulation that penetrate in the vertical direction. Dice 2
Has a double overlapping structure of the first die part 21 and the second die part 22, and the specific structure thereof will be described later with reference to FIGS. 2 and 3.

A main shaft 3 is rotatably installed in a central portion of the body case 1 in a state of penetrating a mounting hole of a die 2, and a screw portion 3a is engraved on an upper end of the main shaft. is there. A holder 5 for supporting the roller 4 is provided on the main shaft 3.
The mounting hole 5a in the center of the
The lower end is fixedly attached to the main shaft by a terminal cap 6, and the upper end is fixedly attached to the main shaft by double lock nuts 7 and 8 screwed into a screw portion 3a at the upper end of the main shaft. A plurality of roller main shafts 9 are radially provided on the main shaft 3 so as to project with angular displacement, and a roller 4 is rotatably supported at the tip of the roller main shaft.
It is designed to roll on the upper surface. A roller cap 10 is attached to the outer end surface of each roller 4. Also, the spindle 3
A plurality of cutter blades 11 are radially fixed to the lower part of the die 2 via a support portion 12. Of course, spindle 3
Although not shown, the lower end of is connected to a drive motor, which is rotatably driven in conjunction with this motor. A lid 14 is fitted into the upper end opening of the main body case 1, and the central portion of the lid 14 has an opening 14 for introducing the granulation raw material.
It is a.

Now, a specific structure of the die 2 will be described with reference to FIGS. The die 2 has a first die portion 21 located above the roller 4 rolling on its upper surface.
And a second die portion 22 that is in contact with the lower surface of the first die portion have a double structure.

The first die portion 21 is made of a hardened steel material having high wear resistance, such as martensite or bainite. The die portion is formed with a plurality of large-diameter insertion holes 211, ... The edge portions 211a, 211b of the upper and lower end openings of each of the insertion holes are tapered so that the diameter is expanded outward. Further, a mounting hole 212 through which the spindle 3 penetrates is formed in the central portion of the first die 21, and both ends of the opening of the mounting hole 212 of the first die portion are fitted with a stepped groove. 212a and 212b are formed.

The second die portion 22 is made of ordinary steel,
The abrasion resistance is lower than that of the first die portion 21, and may be inexpensive. A plurality of insertion holes 221 ··· are formed in the vertical direction in the second die portion 22, and the respective positions of the insertion holes are in a positional relationship corresponding to the insertion holes 211 · · of the first die portion 21. . Further, the inner diameter of the insertion hole 211 of the first die portion 21 varies depending on the manufacturing granulation size, particularly the diameter, but for example, in the case of manufacturing a granulated product having a diameter of 15 mm, 16.5
The insertion hole 2 of the second die portion 22 is about 17.5 mm.
The inner diameter of 21 is generally about 15 mm, and the inner diameter of the insertion hole 221 of the second die portion is smaller than that of the first die portion. Furthermore, in the center of the second die 22,
Similar to the first die, there is a mounting hole 222 through which the main shaft 3 penetrates, and a fitting protrusion 222a is formed on the upper surface of the opening edge of this mounting hole. Groove part 2
It is formed to have an outer shape that can be fitted to 12a and 212b. The thickness of the first die part 21 is equal to the thickness of the second die part 2
If the die 2 is formed thinner than the die 2, the die 2 can be manufactured at a low cost.

Next, the first die portion 21 and the second die portion 2
As shown in FIG. 3, the structure for fastening 2 and the superposed state is as follows.
A plurality of through holes 213, 223 for fastening are penetratingly provided so as to be able to communicate with each other in a vertically corresponding positional relationship, and the arrangement positions are eight positions on the outer circumference of the first and second die parts There are a plurality of places without the insertion holes 211, 221, for example, eight places. Further, since the upper and lower end portions of the through hole 213 of the first die portion 21 are formed in the recesses 213a and 213b having the enlarged diameter, the fastening means, for example, the head of the bolt does not project upward from the upper surface of the die 2. Then, in the first die portion 21 and the second die portion 22, bolts (not shown) penetrate through the through holes 213 and 223 for fastening and fasten these both die portions, and the die 2 is attached to the main body frame. Fixed to 1.

Therefore, the bolt is removed, the die 2 is taken out from the main body frame 1, the first die portion 21 is separated from the second die portion 22, and the first die portion is turned upside down so that the upper surface of the second die portion 22 is covered. It can be mounted and then fixed to the main body frame 1 after fastening both die parts with bolts again.

The operation of the present invention will be described. In the state shown in FIG. 2, the first die part 21 and the second die 22 are fastened in advance in a double structure. This fastening is performed by fitting the fitting protrusion 222a of the second die part 22 to the first die. Part 2
3 is fitted in the fitting groove portion 212b on the lower surface of FIG.
After the through holes 213 and 223 of both dies shown in FIG. 2 are communicated with each other, they are fastened in a superposed state by bolts and integrated, and then fixedly installed on the main body frame 1. The roller 4 can roll on the upper surface of the die 2.

Then, when the drive motor is started, the roller 4 starts rolling on the die 2, that is, the upper surface of the first die portion 21, and at the same time, the granulation raw material is the opening 14a of the lid 14 of the main body frame 1. It is thrown into this frame from.
The granulation raw material is pushed by the tapered edge portion 211a of the insertion hole 211 of the first die portion 21 while being crushed by the roller 4 and the die 2 by the rolling of the roller 3, and is inserted through this insertion hole. While descending, the second die part 22 is pushed downward from the upper end opening of the small-diameter insertion hole 221 to form a rod-shaped (crayon-shaped) shape.
It drops from the die part, is cut by the cutter blade 11 in the middle of this drop, and is stored in a storage chamber (not shown) from the lower end opening of the main body case 1.

By the way, the upper surface of the first die portion 21 is abraded due to friction with the roller 4 over time, and the granulation performance is deteriorated. Therefore, after stopping the granulation work, the die 2
From the body frame 1 and insert the bolts into the through holes 213,
223 to remove the first die portion 21 and the second die portion 2
2, and the first die part is turned upside down. Then, the fitting protrusion 22 of the mounting hole 222 of the second die portion 22
2a to the fitting groove portion 21 of the inverted first die portion 21.
After fitting into 2a, similarly to the above, the through holes 213 and 223 of both die parts are connected to each other, and are again fastened to each other in a superposed state by bolts to be integrated, and then they are installed in the main body frame 1. . The roller 4 can roll on the upper surface of the die 2. Therefore, the granulation work is restarted. In addition,
A large-diameter insertion hole 211 is formed in the first die portion 21, and both opening edge portions 211a and 211b of the insertion hole are tapered, so that the state of FIG. Before inverting, the ground granulation material was
The smooth transition is observed in the experimental results regarding the point that the edge portion 211b of the insertion hole 211 of the first die portion smoothly moves to the small diameter insertion hole 221 of the second die portion 22 and descends. Was completed. After that, if both sides of the first die part 21 are worn, the new first die part 21
To replace.

[0016]

According to the present invention, since both the front and back surfaces of the first die part can be used, the life of the expensive first die part having high abrasion resistance is doubled, and the second die part is Can be used continuously and is effective in terms of both die manufacturing cost and granulation cost. In particular, if the second die part is made of a material similar to ordinary steel, it is more effective in terms of cost.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a granulating device.

FIG. 2 is a developed cross-sectional view showing an insertion hole for granulating a die.

FIG. 3 is a developed sectional view showing a through hole for fastening a die.

FIG. 4 is a sectional view of a conventional die.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body frame 2 Dice 21 1st die part 211 Insertion hole 211a Edge part on one side of insertion hole 211b Edge part on the other side of insertion hole 212a Fitting groove part 212b Fitting groove part 213 Through hole 22 Second die part 221 Insertion hole 222 Mounting hole 222a Fitting projection 223 Through hole

Claims (1)

[Claims] 1. A disk type granulator comprising a die (2) fixedly arranged in a main body frame, and a roller (3) rolling on the upper surface of the die, wherein the die comprises: The first die part (2
1) and a second die part (22) fixedly installed in contact with the lower surface of the first die part, wherein the first die part has a high abrasion resistance. The insert hole (211) is formed of a raw material and is formed in the up-down direction, and the second die portion has the insert hole (211) in a positional relationship corresponding to the insert hole. ), A smaller diameter insertion hole (221) for granulation is formed, and each insertion hole of the first die part is integrated with each insertion hole of the second die part. The first die part is separable from the second die part and can be turned upside down to be connected to the second die part. Structure.