JP2000354781A - Rotary pulverizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cutting impact and to keep a low noise property by constructing blade edges so as to be positioned on the same circumference at an opening edge of a blind hole and constructing a fixed blade and the blade edge so as to cut a material to be pulverized depending on the rotation of a rotor on its axis. SOLUTION: A number of blind hole 23 are provided in line on an outer peripheral surface of a rotor 5. In this case, the blind holes 23 are provided in line on an outer peripheral surface of a ring body 8 having a diameter L1. A blade edge 23A is constructed so as to be positioned on the same circumference at an opening edge of the blind hole 23 and a blade edge 19c of a fixed blade 19 and the blade edge 23A are constructed so as to be able to cut the material to be pulverized depending on the rotation of the rotor 5 on its axis. Because thus the blind hole 23 is provided in line on the outer peripheral surface of the rotor 5 (in this case, the ring body 8), the cutting chance by the fixed blade 19 and the blade edge 23A of the blind hole 23 is continuous. Even if the number of rotation of the rotor 5 is decreased to a level of 20 to 40 rpm, the cutting chance is enough (increased), and cutting impact is reduced to be able to keep a low vibrating property and a low noise property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary crusher for crushing an object to be crushed such as, for example, a plastic runner, processing waste, defective molding and the like.

[0002]

2. Description of the Related Art A rotary pulverizer for pulverizing an object to be pulverized such as a plastic runner or a spool by a cooperative action of a fixed blade and a rotary blade is known. It is recycled as a molding material for automotive gears and the like. Conventional rotary crushers (including crushers)
A blade (flat plate) fixed blade is mounted on the crushing chamber in the casing, and a rotatable claw portion that protrudes radially outward is provided on an outer periphery of a rotor that is rotatably mounted on the crushing chamber in a radial arrangement. The object to be crushed is cut (sheared) by the cooperative action of the rotating claw portion and the fixed blade, and a screen member having a large number of semicircular arc-shaped holes is mounted below the crushing chamber so as to surround the outer periphery of the rotor. What was done was the basic model (see Japanese Utility Model Publication No. 2-44857 and Japanese Utility Model Publication No. 2-17637).

[0003]

In a conventional rotary pulverizer, the object to be pulverized is pulled in by a claw projecting outward in a radial direction by rotation of a rotor (rotary blade) about an axis thereof, and the fixed blade is rotated. Since it is crushed (cut and sheared) by contact with the claw, the chance of contact between the fixed blade and the claw becomes a cutting chance, and since the claw is radially arranged, the circumferential direction of the rotor (rotary blade) is changed. The cutting chance was not limited to the whole (the whole area) but to the number of protruding claws.

[0004] Therefore, in order to improve the crushing efficiency, the rotation speed of the rotary blade must be increased, which causes noise and vibration. Also, in order to recycle as a molding material, the particle size distribution of the pulverized material is an important factor, but in the past, fine and long pulverized materials often pass through the holes of the screen, and the fineness distribution is poor due to poor fineness distribution. Was the cause of the trouble. In particular, the object to be crushed is often carried around by the claws along the inner peripheral surface of the screen member having a semicircular arc shape, causing heat to be generated, and the holes of the screen member are easily clogged, and Not only the distribution becomes worse, but also the frequency of maintenance of the screen member, the fixed blade and the like increases, which causes a decrease in productivity due to interruption of the pulverization.

In view of this, the present invention provides a method in which a plurality of bottomed holes are arranged in a row on the outer peripheral surface of the rotor, instead of projecting a claw portion on the outer periphery of the rotor, and the opening edge of the bottomed hole is used as a blade edge. The object of the present invention is to provide a rotary crusher without a screen member by making the entire outer peripheral area of the rotor act as a cutting chance in cooperation with the fixed blade, and further, the bottomed hole has a function of adjusting the particle size of the crushed material. It is.

[0006]

In order to achieve the above-mentioned object, the present invention employs the following technical means. That is,
A rotary crusher (including a crusher (excluding a slitter type)) according to the present invention includes a rotor 5 having a large number of bottomed holes 23 arranged on an outer peripheral surface thereof, and the rotor 5 having a shaft center. And a casing 4 having a fixed blade 19 which is rotatably supported around the periphery thereof. The casing 4 has a blade edge 23A located on the same circumference at the opening edge of the bottomed hole 23, and the rotor 5
The fixed blade 19 and the blade edge 23A are rotated by the rotation about the axis.
And (c) cutting the object to be ground A (claim 1).

[0007] By adopting such a configuration, the opening edges of the many bottomed holes 23 arranged in a row on the outer peripheral surface of the rotor 5 become blade edges 23 A by the cooperative action with the fixed blade 19, thereby increasing the cutting chance. It has increased significantly. For this reason, the rotation speed of the rotor 5 is 20 to 40 rpm, compared to 300 to 400 rpm in the past, so that noise and vibration factors are significantly reduced. As a result, the heat generation factor was also reduced.

Further, in the rotary pulverizer according to the present invention, the plurality of bottomed holes 23 arranged in the rotor 5 have a function of adjusting the particle size of the material A to be pulverized (claim). Item 2). By adopting such a configuration,
Not only can the semicircular arc-shaped screen member, which is indispensable for the particle size distribution (grain size adjustment), be eliminated, but also the rotor 5 enters the blade edge (blade) 23A and the bottomed hole 23 formed by the opening edge of the bottomed hole 23. In addition to performing the particle size distribution function of discharging only cut pieces, the particle size distribution and the (particle size) become uniform, and trouble during recycling is reduced.

Here, the particle size of the pulverized material is set by the opening area and depth of the bottomed hole 23 and the number of rotations of the rotor 5. Further, in the configuration of claim 1 or 2 described above,
It is recommended that the rotor 5 is provided with a claw portion 9 for coarsely crushing the material A to be crushed and entering the bottomed hole 23 at a material input port 15 formed in the upper part of the casing 4 (claim 3). . By adopting such a configuration, the crushed object A is coarsely crushed at the material input port 15 and the crushed object A is moved at the input port 15. A reliable cutting action is carried out in cooperation with No. 19 to make the particle size uniform.

[0010] Here, the claw portion 9 has little function as a rotary blade like the claw portion projected to the conventional rotor, and the function as the rotary blade is exclusively provided by the opening edge of the bottomed hole 23. Therefore, the claw portion 9 only needs to be able to secure the movement (prevention of stopping) at the input port 15 of the crushed object A.
Can be constituted by a rod, a flat plate or the like. Further, in the present invention, in the above-mentioned claim 3, it is recommended that the claw portions 9 are provided with a gap in the axial direction of the rotor 5 and a rotation radius different from each other. 4).

The claw portion 9 having a different turning radius as described above.
Is provided, the material A to be crushed can be dispersed throughout the material input port 15, and the chance of cutting the blade edge 23 </ b> A of the bottomed hole 23 and the fixed blade 19 is ensured. Here, the claw portion 9 has the same turning radius (any of large, medium, and small)
It is also possible to employ a material having a small radius of rotation (including three types, large, medium, and small). It becomes. Further, in the present invention, in the configuration of claim 3 or 4 described above, the casing 4 is provided with the guide member 24 having the arc groove 24A for guiding the claw 9 provided on the rotor 5. Is recommended (claim 5).

By providing the guide member 24 having the arc groove 24A as described above, a thin and long material is not unexpectedly discharged, and the particle size distribution is improved.
The thin and long material is again carried around to the slot 15 by the claw portion 9 in the arc-shaped groove 24A, and receives a cutting opportunity again. Since the guide member 24 does not have the function of the conventional screen member and only carries a part of a thin and long material, it does not cause much heat.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rotary crusher according to the present invention will be described below with reference to the drawings. FIG. 11 is an overall perspective view of an example of the crusher 1, in which a casing 4 is mounted and fixed on a gantry 3 having wheels 2, and a cylindrical crushing chamber is defined inside the casing 4. In the grinding chamber, a rotor is rotatably mounted around a horizontal axis.

That is, referring to FIGS. 1 and 2, a rotor 5 mounted on a crushing chamber has a main shaft 6 and a ring body which is fitted over the main shaft 6 and mounted by a key 7 in the drawing. Ring-shaped coarse crushing blade 1 having a hook 8 and a claw 9
0, and both ends of the main shaft 6 are mounted on the casing 4 so as to be rotatable around a horizontal axis by bearings 11, and the starting force of the electric motor 12 is provided in the relay transmission case 13. It can be transmitted from one end of the main shaft 6 via a transmission or a winding transmission.
The stop can be controlled by the operation member 14A of the control box 14.

The upper part of the casing 4 is formed with a material input port 15 which is opened upward. The input port 15 has an input chute 16 shown in FIG. 11 or an auxiliary chute 17 provided as necessary. Plastic runner, etc. through
An object A to be crushed such as a spool can be charged. Of course, instead of the chutes 16, 17, etc., the crushed material A may be supplied to the inlet 15 by a conveyor or the like. The lower part of the charging port 15 is communicated with the pulverizing chamber 18.
A fixed blade 19 is mounted on a lower portion of one side of 5 and an inner surface of the crushing chamber 18.

The fixed blade 19 shown in the figure is a flat plate (blade) mounted on the upper surface of the spacer 20 and is exchangeably fastened by a bolt fastening means 21 and has an adjusting means having a screw structure. 22 allows the cutting edge 19C of the fixed blade 19 to be adjustable in advance and retreat. A number of bottomed holes 23 are arranged in a row on the outer peripheral surface of the rotor 5. In the illustrated example, the bottomed holes 23 are arranged in a row on the outer peripheral surface of the ring body 8 having a diameter L <b> 1. The blade edge 23A is located on the same circumference, and is rotated around the axis of the rotor 5 (the arrow R in FIG. 1 indicates the rotation direction). The object A to be crushed can be cut.

Since the bottomed holes 23 are arranged on the outer peripheral surface of the rotor 5 (on the outer peripheral surface of the ring body 8 in the figure) in the circumferential direction and the axial direction, the fixed blade 19 and the bottomed hole are provided. The cutting chance by the blade edge 23A of the hole 23 becomes continuous. Even if the rotation speed of the rotor 5 is reduced to 20 to 40 rpm, the cutting chance becomes sufficient (increases), and the cutting impact is reduced. This ensures low vibration and low noise. Since the bottomed holes 23 arranged in a large number of rows are used to discharge only the ones having cut pieces therein into the lower part by the rotation of the rotor 5, the bottomed holes 23 substantially have a particle size adjusting function. The grain size is set by the opening area and depth of the bottomed hole 23 and the number of rotations of the rotor 5.

Therefore, according to the present invention, the rotor 5 having a large number of bottomed holes 23 arranged on the outer peripheral surface thereof, and the fixed blade having the rotor 5 rotatably mounted around the axis thereof. 19
And a casing 4 having a blade edge 23A located on the same circumference at the opening edge of the bottomed hole 23. The fixed blade 19 and the blade are rotated by rotation of the rotor 5 about its axis. The basic mode (basic configuration) is to cut the object A with the edge 23A, that is, since the rotor 5 has the hole-shaped blade, the cutting load is dispersed and the power is reduced. Because In addition, the rotor 5 has a hole-shaped blade, and the many bottomed holes 23 arranged in the rotor 5 have a function of adjusting the particle size of the material A to be crushed.

In the basic form described above, the main shaft 6 is combined with the ring body 8 in a skewered manner, and the ring body 8 can be assembled and disassembled by a key or a spline connection. Although it is advantageous from the viewpoint that the bottomed hole 23 can be used twice by rearrangement by polishing once, the rotor 5 in which the ring body 8 and the main shaft 6 are integrated can also be used. Further, in the illustrated embodiment, in addition to the basic configuration described above, the rotor 5
Is provided with a claw portion 9 for coarsely crushing the material A to be crushed and entering the bottomed hole 23 at a material input port 15 formed at an upper portion of the casing 4.

As described above, by providing the rotor 5 with the coarse crushing blade 10 having the claw portion 9, the crushed material A is moved by a movement such as scraping or pulling in at the input port 15 to enter the bottomed hole 23. Not only promote
The crushed material A is roughly crushed by the cooperation of the claw portion 9 and the fixed blade 19. In this case, the claw portion 9 may have a coarse crushing blade 10 having the same radius of rotation (same diameter) as the skewered shape on the main shaft 6 and may be assembled and disassembled by a key or a spline, as shown in FIG. Crushing blade 10A with diameter L2
It is advantageous to employ a coarse crushing blade 10 having an interval in the axial direction and having a different turning radius (diameter) such as a coarse crushing blade 10B having a diameter L3.

The phase of the blade 9 of the crushing blade 10 is shifted in the circumferential direction, as shown in FIG. 1, so that the load is dispersed when the blade 9 is engaged with the fixed blade 19, which is advantageous. When the rotor 5 is provided with the claw portion 9, the guide groove 1 that allows the claw portion 9 to pass through is provided on the fixed blade 19 and the spacer 20 in the figure.
9A, 19B, 20A, and 20B are formed respectively. In the embodiment, the claw portions 9 are the large and small claws 9A and 9B, so that the guide grooves 19A, 10B, 20A, and 20B also have different depths. Is formed.

In the illustrated embodiment, as shown in FIG. 2, the coarse crushing blade 10A having a diameter L2 is located at the center in the axial direction of the rotor, and the coarse crushing blade 10B having a diameter L3 is located at both axial ends. At the center of the rotor shaft, the pulling or scraping of the material A to be crushed is promoted to enhance the dispersion efficiency over the entire inlet 15. However, a coarse crushing blade 10B having a diameter L3 may be disposed at the center of the rotor shaft center, and a coarse crushing blade 10A having a diameter L2 may be disposed at both axial ends. By projecting the claw portion 9 to the rotor 5, the fixed blade 19 and the spacer 2
0 is the guide groove 19A, 19B, 20A, 20 respectively.
B is formed, and the elongated crushed material may pass downward through the guide groove. Therefore, the casing 4 has a guide member having an arc-shaped groove 24A for guiding the claw portion 9 provided on the rotor 5. 24 are provided.

The guide member 24 is divided into right and left parts as shown in FIG. 1, and the divided members 24B and 24C are screwed to the side walls 4A and 4B of the casing 4, respectively.
The guide grooves 19A, 19B, 20A, and 20B are attached with the mating surfaces 24D butted by 5B.
The thin long pulverized material that has entered B is carried around by the claw portion 9 in the arc-shaped groove 24A communicating with the guide grooves 19A, 19B, 20A, and 20B in the circumferential direction, and is circulated again to the charging port 15. In this case, only the material having a predetermined particle size (grain size) that has entered the bottomed hole 23 is discharged downward and stored in a receiving box or the like (not shown).

On the other side of the inlet 15 facing the fixed blade 19, a barrier 26 for preventing the backflow of the crushed material A is provided. 4 to 10, the bottomed hole 23
Of various embodiments are illustrated. First, FIGS. 4 and 5 illustrate a bottomed hole 23 having a circular opening edge and a semicircular cross section, and FIG. 6 illustrates a bottomed hole 23 having a trapezoidal cross section. Is advantageous because the crushed material that has entered the bottomed hole 23 can be smoothly discharged.

Further, the sectional shape of the bottomed hole 23 may be triangular as shown in FIG.
The opening edge shape of the bottomed hole 23 is an oval having a major axis in the rotation direction as shown in FIG. 8, an oval having a major axis crossing the rotation direction as shown in FIG. 9, and shown in FIG. As described above, in addition to an oblong combination in which the major axis is in an oblique direction, it is also possible to form a square to an octagon. Further, in the drawing, the coarse crushing blade 10 and the ring body 8 are separately attached and mounted in a skewered manner on the main shaft 6 to ensure the ease of replacement and processing. And may be one.

The above embodiment is an example, and the present invention can be variously modified. For example, the illustrated barrier 2
The fixed blade 19 may be provided at the position 6 to make the rotor 5 a forward / reverse switching type. In this case, the protruding direction of the claw portion 9 is set to the forward / reverse arrangement to correspond to the forward / reverse rotation. Can be. The object to be ground may be industrial waste such as tires, in addition to industrial waste such as plastic.

[0027]

As described above in detail, according to the present invention, since the rotating blade has a large number of bottomed holes provided on the outer peripheral surface of the rotor, the chance of cutting with the fixed blade is increased, so-called continuous cutting. This is an opportunity, and thereby, cutting efficiency is improved, so that the number of revolutions (speed) can be suppressed, which has advantages such as low vibration and low noise, and improvement in particle size distribution.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a main part of a rotary pulverizer.

FIG. 2 is a front sectional view.

FIG. 3 is an enlarged view of a main part (cutting start part) of FIG. 1;

FIG. 4 is a plan view showing a part of a rotor.

FIG. 5 is a sectional view showing a first example of a bottomed hole.

FIG. 6 is a sectional view showing a second example of the bottomed hole.

FIG. 7 is a sectional view showing a third example of the bottomed hole.

FIG. 8 is a plan view showing a first modification of the opening shape of the bottomed hole.

FIG. 9 is a plan view showing a second modification of the opening shape of the bottomed hole.

FIG. 10 is a plan view showing a third modification of the opening shape of the bottomed hole.

FIG. 11 is an overall perspective view showing an example of a rotary pulverizer.

[Explanation of symbols]

 5 Rotor 9 Claw 15 Input port 19 Fixed blade 23 Hole with bottom 23A Blade edge

Claims (5)

[Claims] 1. A rotor (5) having a large number of bottomed holes (23) arranged in an outer peripheral surface thereof, and a fixed blade (22) around which the rotor (5) is rotatably mounted around its axis. And a casing (4) having an opening edge of the bottomed hole (23), and constitutes a blade edge (23A) located on the same circumference as an opening edge of the bottomed hole (23), and an axial center of the rotor (5). The object to be crushed (A) is formed between the fixed blade (19) and the blade edge (23A) by the rotation of the periphery.
A rotary pulverizer characterized in that the rotary pulverizer is configured to cut off. 2. The method according to claim 1, wherein the plurality of bottomed holes (23) arranged in a row in the rotor (5) have a function of adjusting the particle size of the material to be ground (A). Rotary crusher. 3. A claw portion for crushing an object to be crushed (A) and entering a bottomed hole (23) at a material inlet (15) formed at an upper portion of a casing (4) of a rotor (5). 3. The method according to claim 1, wherein (9) is provided.
A rotary pulverizer according to item 1. 4. The rotary pulverizing device according to claim 3, wherein the pawl portions are provided with intervals in the axial direction of the rotor and with different turning radii. Machine. 5. The casing (4) includes a rotor (5).
Arc groove (24A) for guiding the claw portion (9) provided in the groove
The rotary pulverizer according to claim 3, further comprising a guide member having the following.