JPH07155630A - Twin-screw grinder - Google Patents

Abstract

PURPOSE:To achieve miniaturization by reducing the number of parts and the number of kinds and to enhance the grinding efficiency of matter to be ground by providing fixed blades having the same width as rotary blades in a machine frame in opposed relation to the central part between the shafts of the rotary blades fixed to both rotary shafts at a predetermined interval. CONSTITUTION:A motor is provided to the right end of a drive shaft 6b to be rotated in the direction shown by a arrow A' and a drive shaft 6a is rotated in the direction shown by an arrow A through a gear. A plurality of rotary blades 2a, 2b are integrally fixed to the drive shafts 6a, 6b at predetermined intervals and rotated in the directions shown by the arrows A, A' so as to involve the matter to be ground. Fixed blades 3a and fixed blades 3b are provided to a machine frame 1 so as to be respectively opposed to the rotary blades 2b, 2a and the drive shafts 6a, 6b are loosely fitted in the through-holes 12 provided to the central part of the fixed blades 3a, 3b. The fixed blades 3a, 3b are constituted of the blade guide parts 13 fixed to the machine frame 1 and cutters 14 formed from a hard material and the cutters 14 are fixed to the upper surfaces of the guide parts 13 by screws.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crusher for crushing wastes such as plastics and metal cans, and more particularly to a crusher having two drive shafts for rotating a cutter. Regarding the crusher.

[0002]

2. Description of the Related Art Conventionally, a crusher for crushing wastes such as plastic and metal cans has been constructed by fixing a crushing blade and a crushing blade on a single drive shaft in a skewered manner. It is known that a fixed comb blade is provided so as to face the above to crush a plastic molded product or the like (see, for example, Japanese Utility Model Laid-Open No. 61-3461). Furthermore, a large shred cutter and a small crushing cutter are fixed in a skewered manner on two drive shafts that are supported in parallel with each other, and are provided between the small crushing cutters that are opposed by the two drive shafts. It is known to have a fixed blade and rotate two drive shafts in opposite directions (for example, US Pat. No. 5201).
475).

[0003]

In the former of those described in the prior art, since the coarse crushing blade and the fine crushing blade provided on the drive shaft are opposed to one fixed comb blade, the object to be crushed is crushed. When crushing, the object to be crushed flies by equilibrium force between the rough crushing blade and the fixed comb blade, or between the fine crushing blade and the fixed comb blade and dances in the machine frame. Furthermore, if the peripheral speed of the fine crushing blade is smaller than that of the coarse crushing blade, the crushing ability will drop significantly, or if the crushed object will stick to the fixed comb blade until there is no gap with the outer diameter of the rough crushing blade or fine crushing blade. Since it is impossible to bite the object to be crushed between the rough crushing blade and the fixed comb blade and between the fine crushing blade and the fixed comb blade, and the crushing ability is lost, it is necessary to frequently clean around the fixed comb blade.

In the latter case, the shredded large cutter is fixed to the two drive shafts provided in parallel so that the shredded large cutter is sandwiched between the shredded small cutters. It was difficult to cut and evenly crush it.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to reduce the number of parts and types, to reduce the size, and to further crush objects. It is intended to provide a twin-screw crusher that improves crushing efficiency.

[0006]

In order to achieve the above object, the biaxial shredder according to the present invention is arranged such that a plurality of cutting blade portions are equally divided on the outer circumference, and the cutting blade portions and the cutting blades are arranged. A plurality of rotary blades having a crushing blade portion between the parts, the drive shaft is arranged with a gap so as to be slightly wider than the width of the rotary blade, and the rotary blade disposed on the other one of the drive shafts, The rotary blades are integrally fixed to the drive shafts so as to be sandwiched in the gap, and a rotary blade having the same width as the rotary blades is provided inside the machine frame so as to face the center side between the rotary blades fixed to both drive shafts. It is a thing.

Therefore, all the rotary blades have the same shape, and they are fixed to the drive shaft with an angular difference of about 1/2 of the opening angle at which the cutting blades are arranged.

Further, the distance between the pair of parallel drive shafts is not more than the difference between the outer diameter of the rotary blade and the height of the cutting blade.

Further, it is preferable that the fixed blade forms a descending slope from the inner edge of the machine frame toward the central portion.

[0010]

The operation of the present invention will be described with reference to the drawings. Figure 1
Is an explanatory view of the main part of the biaxial crusher of the present invention, showing the rotary blades 2a,
2b shows a combination of the fixed blades 3a and 3b. The rotary blades 2a and 2b are integrally fixed to the pair of drive shafts 6a and 6b and rotated in the directions of arrows A and A ', and for example, a cutting blade portion 7 provided on the rotary blade 2a rotated by one drive shaft 6a. , The arrow A'by the other drive shaft 6b
The crushing blade portion 8 formed on the rotary blade 2b that is rotated in the direction is adjacent to each other, and the crushed object having a thickness twice or more the thickness of the rotary blades 2a and 2b is always one or more cutting blade portions. 7 and one or more crushing blades 8, and the drive shafts 6a, 6b.
Is crushed to a thickness equal to or less than the thickness of the rotary blades 2a and 2b.

Next, when the rotary blades 2a and 2b are further rotated in the directions of arrows A and A ', the space between the two drive shafts 6a and 6b between the crushed object 5 cutting blade portion 7 and the fixed blade 3b. Cut more widthwise.

The descending slope 9 is formed on the upper side surfaces of both the fixed blades 3a, 3b, and the crushed object 5 is brought close to the drive shafts 6a, 6b in the machine frame 1 by its own weight. Make it possible to increase the crushing amount.

[0013]

EXAMPLE FIG. 2 is an internal plan view of the twin-shaft crusher of the present invention. A pair of drive shafts 6a and 6b are loosely fitted in the machine frame 1 in parallel and rotatably. Gears 10a and 10b are fitted to the left ends of the drive shafts 6a and 6b and mesh with each other. A motor 11 is provided at the right end of the drive shaft 6b and is rotated in the arrow B'direction, and at the same time, the drive shaft 6a is rotated in the arrow B direction via the meshing of the gears 10a and 10b. Therefore, the crushed objects 5 are in the machine frame 1 and are collected toward the tips of the fixed blades 3a and 3b. Gear 10a,
10b and the motor constitute the driving device 4.

The fixed blade 3a is provided on the machine frame 1 so as to face the rotary blade 2b, and the fixed blade 3b is provided so as to face the rotary blade 2a. In this case, the fixed blades 3a, 3b and the drive shafts 6b, 6a
However, as shown in FIG. 3, the drive shafts 6b, 6a are loosely fitted in the shaft through holes 12 provided at the centers of the fixed blades 3a, 3b. The fixed blades 3a and 3b are composed of a blade guide portion 13 fixed to the machine frame 1 and a cutter 14 formed of a super hard material, and the cutter 14 is fixed to the upper surface of the blade guide portion 13 with screws. Therefore, after the drive shafts 6b and 6a are provided on the machine frame 1, the fixed blade 3
It is also easy to fix a and 3b to the machine casing 1.

4 (a), (b) and (c) show the drive shaft 6.
90 ° -divided rotary blade 2 fixed integrally to a and 6b
It is a process explanatory view of the rotation angle of a and 2b and the cutting and crushing of the crushed object 5.

In FIGS. 4 (a), (b) and (c),
The rotary blades 2a and 2b are integrally fixed to the drive shafts 6a and 6b, and are rotated in the directions of arrows A and A'to wind the crushed object 5 therein. The distance between the two drive shafts 6a and 6b is determined by the diameter of the rotation locus of the tip of the cutting blade 7 and the height h of the cutting blade 7.
By setting the difference to be less than or equal to
The state is longer than the width of 2b, that is, the cutting in the longitudinal direction of the drive shafts 6a, 6b is not completed 3 and is not sent out of the machine casing 1. When the distance between the drive shafts 6a and 6b becomes 1/2 or less of the diameter of the rotation locus of the tip of the cutting blade portion 7, as shown in FIG. 4 (a), for example, one rotary blade 2a is adjacent to each other. The crushing and crushing blade portion 8 provided between the cutting blade portions 7 and the cutting blade portion 7 provided on the other rotary blade 2b face each other at a narrow interval, and the object to be crushed 5 cannot be sandwiched greatly.

Further, in FIGS. 4A, 4B, and 4C, the phase relationship of the cutting blade portions 7 provided on the rotary blades 2a and 2b is shifted by 45 degrees. For example, θ shown in FIG.
1-θ2≈1 / 2Q. , In this case Q. Indicates 90 degrees.
That is, about half of the opening angle formed by the cutting blade 7 is the crushed object 5.
Is largely sandwiched between the crushing blade portion 8 and the cutting blade portion 7.

As described above, the crushed object 5 is rotated as shown in FIG. 4 (a) with the distance between the drive shafts 6a, 6b set and the deviation of the rotation angle of the rotary blades 2a, 2b set. Blade 2
It is sandwiched between the crushing blade portion 8 of a and the cutting blade portion 7 of the rotary blade 2b.

When the rotary blades 2a and 2b are further rotated in the directions of arrows A and A ', the crushing blade portion 8 of the rotary blade 2a and the rotary blade while biting the object to be crushed 8 as shown in FIG. 4 (b). It approaches so that the cutting blade part 7 of 2b may contact. During the transition from FIG. 4 (a) to FIG. 4 (b), the crushed object 8 is gradually cut into the same length as the thickness of the rotary blades 2a and 2b.

Further, during the transition from FIG. 4 (b) to FIG. 4 (c), the crushed object 5 cut to the same length as the thickness of the rotary blades 2a and 2b is fixed blade 3a and the cutting blade portion. 7 and the rotary blade 2a is further cut into a half of the opening angle of the cutting blade.

[0021]

Since the present invention is configured as described above, it has the following effects.

A pair of drive shafts 6 which rotate in mutually opposite directions
By narrowing the distance between a and 6b and arranging the rotary blades 2a and 2b integrally fixed to both drive shafts 6a and 6b and the fixed blades 3a and 3b so as to face each other, the conventional crushing blade can be used. It can be dispensed with, the rotary blades 2a and 2b can be made common, parts can be easily managed, and the drive shafts 6a and 6b can be downsized by narrowing the distance between them.

The distance between the drive shafts 6a and 6b is such that the rotary blades 2a and
The difference between the outer diameter of 2b and the length h of the cutting blade 7 must be less than or equal to
The phase of the rotary blades 2a and 2b is about 1/2 of the opening angle of the cutting blade portion 7.
By shifting, the crushed object 5 can be uniformly cut and crushed.

By providing the descending slope 9 on the upper side surfaces of the fixed blades 3a, 3b, the crushed object 5 is brought closer to the center, and the rotary blade 2
There are effects such as efficient cutting and crushing by a and 2b.

[Brief description of drawings]

FIG. 1 is an explanatory view of a main part of a biaxial crusher of the present invention.

FIG. 2 is a plan view of the inside of the biaxial crusher of the present invention.

FIG. 3 is a diagram illustrating an example of a fixed blade portion.

FIG. 4 is an explanatory diagram of cutting and crushing of a crushed object.

[Explanation of symbols]

 1-machine frame 2a, 2b-rotary blade 3a, 3b-fixed blade 4-driving device 5-crushed object 6a, 6b-drive shaft 7-cutting blade portion 8-crushing blade portion 9-falling slope

Claims (4)

[Claims] 1. A crushing device for crushing an object to be crushed, which is provided between a rotary blade and a fixed blade, which is rotated by a drive device, by providing a rotary blade and a fixed blade inside a machine frame. A pair of drive shafts that are rotated in opposite directions and a plurality of cutting blade portions are arranged so as to be equally divided on the outer periphery by a driving device that is configured with a gear that converts the rotation direction. A plurality of rotary blades having a crushing blade portion between the cutting blade portion and the cutting blade portion are arranged on the above-mentioned drive shaft with a gap formed to be slightly wider than the width of the rotary blade, and are arranged on the other drive shaft. The rotary blades are integrally fixed to the drive shafts so as to be sandwiched in the gaps, and the fixed blades facing the center between the rotary blades fixed to both drive shafts and having the same width as the rotary blades are machined. A biaxial crusher characterized by being installed inside the frame. 2. The rotary blades arranged on the pair of drive shafts have the same shape, and are fixed to the drive shaft by being displaced by an angular difference of about 1/2 of the opening angle at which the cutting blade portions are arranged. The biaxial crusher according to claim 1, wherein 3. The biaxial shredder according to claim 1, wherein the distance between the pair of parallel driving shafts is not more than the difference between the outer diameter of the rotary blade and the height of the cutting blade. 4. The biaxial shredder according to claim 1, wherein the fixed blades facing each other form a descending slope from the inner edge of the machine frame toward the central portion.