JP3124509B2 - Fixed blade of crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fixed blade for a crusher attached to a crusher for crushing industrial waste and the like.

[0002]

2. Description of the Related Art Conventionally, various types of crushers have been devised and put into practical use according to the type of crushed material and the purpose of crushing. Among these, quite a number of proposals have been made that use cemented carbide and other ultra-hard tool materials for the purpose of extending the life of the blade. For example, Japanese Patent Publication No. 6-75686 discloses rocks, ores, etc. There is disclosed a technique for using a cemented carbide in a striking portion of a striking element used in an impact type crusher for impact crushing. Japanese Utility Model Application Laid-Open No. 63-32643 is characterized in that the surface of a roller mill used for pulverizing relatively hard raw materials such as silica sand and alumina is spread with small pieces of cemented carbide chips. Japanese Unexamined Patent Publication No. Sho 62-30820 relates to a pulverizer that performs ultra-fine pulverization with a grain size on the order of several microns, and uses ceramics in this case for a ridge portion directly responsible for pulverization.

[0003] The crusher to which the present invention is directed is a crusher configured to crush a material to be crushed by the action of a shearing force or a cutting force generated at an engagement portion between a rotating rotor and a fixed blade. It is mainly used for crushing industrial waste. In this type of crusher, steel materials such as alloy tool steel and high-speed tool steel have been used for the rotating rotor and the fixed blade. The crushed material input to the crusher as industrial waste is not constant, and sometimes lumps of iron are mixed in. Cemented carbides are inferior in impact strength to steel materials as exemplified above, and are apt to be broken when an iron lump or the like is mixed in the material to be crushed.

[0004]

On the other hand, the cutting edge portion of the crusher formed of the above-mentioned steel material is excellent in chipping resistance but not sufficient in wear resistance and has a short life. With. For example, when disposing of a spring-loaded mattress, the spring steel used as a spring does not differ much in material hardness from the steel used for the cutting edge of the crusher, and the cutting edge may cause severe wear. Becomes

If the life of the cutting blade is short, frequent maintenance is required. In addition, since the entire fixed blade and the like, including the cutting blade portion, are integrally formed of the same steel material, the entire fixed blade must be replaced at a time depending on the service life, which is costly. Since it is an integral part, the replacement work becomes large, and the troublesome setting is added, so that the working time is prolonged.

[0006]

In recent years, however, the sorting process has been performed, and the direction in which the crushed material can be selected is changing. If foreign matter such as iron lump is removed by sorting, there is no fear of sudden loss, and the characteristics of a cemented carbide having excellent wear resistance can be utilized. The present invention has been made in view of the above-mentioned problems and the above-mentioned trends, and relates to a cemented carbide fixed blade of a crusher.

That is, in the first aspect, a rotating rotor which is mounted around the main shaft of the crusher and has a cutting blade portion protruding from an outer peripheral surface thereof, and a predetermined gap is provided in a rotation locus of the cutting blade portion. The fixed blade of the crusher, which is configured to crush the object to be crushed by the fixed blade provided with the cutting blade portion so as to confront and hold, the cutting blade portion of the fixed blade is made of a cemented carbide chip. , The tip presents a square plate, at least one
45 ° chamfered corners at opposite top corners
Are formed and the chamfered corners are adjacent to each other.
Being juxtaposed in a row and screwed to the fixed blade body
Further, a cutting edge portion is formed.

According to the second aspect, the cutting blade of the fixed blade of the crusher is
Consisting of cemented carbide tips, the tips are square flat
Present a board, one end of one side of the square of one chip and the other
One end of one side of the square of the chip is adjacent and juxtaposed
In addition, a plurality of chips are arranged in a row by repeating the above.
Is fixed and screwed to the fixed blade body.
A cutting edge portion is formed.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are schematic diagrams for explaining the configuration of the crusher. FIG . 1 shows a longitudinal section of the entire machine.
FIG. 3 is a perspective view illustrating a relationship between a rotating rotor and a fixed blade. The rotary rotor 1 is mounted around the main shaft of the crusher 2, and is driven to rotate by a motor. A cutting blade 3 protrudes outward from the outer peripheral surface of the rotating rotor 1. The fixed blade 4 is fixed parallel to the rotation axis of the rotary rotor 1. The fixed blade 4 is also provided with a cutting blade 5,
2 is formed in a blade shape that faces the rotation locus of the cutting blade portion 3 of the rotary rotor 1 with a predetermined gap as shown in FIG.

The fixed blade 4 is located below the center of rotation with respect to the rotating rotor 1 rotating in the direction of arrow A, and is installed in a direction opposite to the rotation. Industrial waste, which is the crushed material, is thrown in from above the hopper 6 and falls into the crushing chamber 7. At the side of the crushing chamber 7, there is provided a pressing mechanism 8 that moves the piston toward the center of the rotating rotor 1 as indicated by an arrow B, and presses the object to be crushed against the rotating rotor 1. When the cutting blade 3 of the rotating rotor 1 and the cutting blade 5 of the fixed blade 4 mesh with each other, the crushed material is broken into small pieces by the action of shearing force or cutting force. The crushed material is sieved by a screen 9 that is in front of the rotating rotor 1 in the rotation direction and is continuous with the fixed blade 4, and only the crushed material having a predetermined size or less passes through a sieve and falls below the floor 10 and is collected. Is done.

[0012] 3 to 6, forms an embodiment in which are shown, the one side is provided with a notched step portion 12 tip seat of the fixed blade body 11 of the fixed blade 4 of the present invention according to claim 1 are doing. The tip 13 is made of a cemented carbide, has a square plate shape in appearance, and has a bolt hole 14 formed in the center thereof. In this embodiment, the four corners of the chip 13 are both 4
It is formed into a chamfered corner 15 chamfered at 5 degrees. The chips 13 are juxtaposed such that the chamfered corners 15 of the two chips 13 are adjacent to each other, and the above-described repetition is similarly applied to the third and fourth chips 13, so that all the chips are in a line. Blade body 11 in a state where
Attached to. The mounting of the chip 13 is performed by tightening with a hexagon socket head bolt 16. With such a configuration, the cutting blade portion 5 forms a saw tooth having a symmetrical uneven shape.

The fixed blade 4 is mounted and fixed to the main body of the crusher 2 through a mounting hole 17. Since the cutting blade 3 of the rotating rotor 1 at the facing position must have a blade shape that faces the cutting blade 5 of the fixed blade 4 while maintaining a predetermined gap, the cutting blade 3
Is also formed as a sawtooth having a symmetrical uneven shape.

FIG . 7 shows an embodiment of the present invention according to claim 2 , and the same parts as those described above are denoted by the same reference numerals. In this drawing, a notch step 12 is provided on one side of the fixed blade main body 11 of the fixed blade 4 to form a tip seat.
The tip 13 is made of a cemented carbide, has a square plate shape in appearance, and has a bolt hole 14 formed in the center thereof. The four corners of the chip 13 are, for example, round corners. The chips 13 are juxtaposed such that one end of one side of the square of one chip and one end of one side of the square of another chip are adjacent to each other. The fixed blade main body 11 is attached to the fixed blade main body 11 in a state of being lined up and arranged in a line. The tip 13 is mounted with a hexagon socket head bolt 16
This is done by tightening. With such a configuration, the cutting blade portion 5 forms a saw tooth having an asymmetric uneven shape.

The fixed blade 4 is mounted and fixed to the main body of the crusher 2 through a mounting hole 17. Since the cutting blade 3 of the rotating rotor 1 at the facing position must have a blade shape that faces the cutting blade 5 of the fixed blade 4 while maintaining a predetermined gap, the cutting blade 3
Is also formed in a sawtooth having an asymmetric uneven shape.

[0016] and then to introduce the practical embodiment of the present invention. Fixed blade 4
Usually, only one set is used for the rotary rotor 1 and several sets are arranged side by side and in close contact with each other, and it is formed as if there is one set of a fixed blade having a long length and one rotary rotor. In such a crusher, the mattress with the spring in it was selected as the material to be crushed.
As a result of practical use, the service life of the conventional fixed blade made of steel (SKD11) is about two weeks, whereas the practical result of the fixed blade made of cemented carbide can provide a life of more than three months.

If the bolt holes 14 are vertically symmetrical, the chip 13 can be used on both front and back sides. Bolt hole 1
If 4 is countersunk, the tip 13 is fastened and fixed by countersunk screws. In addition, the present invention relates to a technique for using a cemented carbide for the fixed blade 4, but by using the cemented carbide tip having the same configuration as the fixed blade 4 for the cutting blade portion 3 of the rotating rotor 1, The life of the cutting blade 3 can be extended.

[0018]

According to the present invention, a cemented carbide chip is used for the cutting edge of the fixed blade of the crusher of the present invention , and the abrasion resistance is greatly improved by the devised chip arrangement, thereby extending the tool life.
Since the cemented carbide tip is configured to be detachably attached to the fixed blade body, even if the wear has progressed and its life has expired, or if it has happened to be chipped, the cutting edge concerned is an unused cutting edge Can be replaced with The tip exchange operation can be performed easily, quickly and safely, and the fixed blade body does not need to be moved, so that there is no need to adjust the blade edge.

[0019] By the above features, the running cost of the result, the crusher is improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of the entire crusher machine.

FIG. 2 is a perspective view of a rotating rotor and a fixed blade portion in the crusher.

3 is a plan view of the fixed blade, which is an embodiment according to claim 1 of the present invention.

FIG. 4 is a sectional side view taken along the line CC of FIG. 3;

FIG. 5 is a plan view of a tip mounted on the fixed blade of FIG. 3;

FIG. 6 is a side view of FIG. 5;

7 is a plan view of the fixed blade, which is an embodiment according to claim 2 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotating rotor 3 Cutting blade part 2 Crusher 4 Fixed blade 5 Cutting blade part 11 Fixed blade main body 13 Tip 15 Chamfering corner

Claims (2)

(57) [Claims] 1. A rotating rotor, which is mounted around a main shaft of a crusher and has a cutting edge protruding from an outer peripheral surface thereof, and faces a rotating trajectory of the cutting edge while maintaining a predetermined gap. In the fixed blade of the crusher which is configured to crush the object to be crushed by the fixed blade provided with the cutting blade portion, the cutting blade portion of the fixed blade is made of a cemented carbide chip, and the chip is square. Presenting a flat plate, at least one pair
A chamfered corner that is chamfered at 45 degrees is formed at the top corner
The chamfered corners are arranged in a row so that they are adjacent to each other.
Is fixed and screwed to the fixed blade body.
A fixed blade of a crusher, wherein a cutting blade portion is formed. 2. The crusher is mounted around a main shaft and has an outer peripheral surface.
Is a rotating rotor having a cutting blade portion protrudingly arranged, and
So that they face each other with a predetermined gap in the rotation locus of the cutting edge
The crushed material is crushed by the fixed blade provided with the cutting blade.
In the fixed blade of the crusher, the cutting edge of the fixed blade is made of a cemented carbide tip.
In addition, the chip has a square plate shape and the square of one chip
One end of one side and one end of one side of the square of the other chip
Are placed next to each other and
Multiple tips are arranged in a row and screwed to the fixed blade body
The cutting edge is formed by being fixed
And the fixed blade of the crusher.