JPH049098B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Field of Industrial Application This invention relates to a plurality of impact plates for an impact crusher that are attached to the peripheral edge of a plurality of rotor bodies attached to a main shaft.

(2) Prior Art The impact type crusher of the type described above is known, for example, from Japanese Patent Publication No. 61, filed already by the applicant of this application.
This is already known as disclosed in Japanese Patent No. -32062. This impact type crusher is constructed as shown in FIGS. 3 to 5.

In the drawings, reference numeral 1 designates a frame, on which is supported a rotating shaft 2 that is selectively rotated in both forward and reverse directions by a drive device (not shown). A plurality of plate-shaped rotor bodies 4 are fixed at the center.

A plurality of mounting grooves 5 are formed radially at equal intervals on the circumference of the rotor body 4.
Mouth portions of the device are provided with lip portions 6 that face each other and protrude inwardly, and a horizontal channel-shaped holder 8 is removably attached to the mouth portions 6.

A striking plate 21 is removably attached between the holders 8. This striking plate 21 has a fitting groove 22 in the middle part.
is formed in this fitting groove 22, and a vertically long recess 25 is formed in this fitting groove 22.
is formed.

To attach the striking plate 21, the fitting groove 22 is loosely fitted into the gap between the holders 8 from the lateral direction, and then the holder pin 27 is inserted into the through holes 17 and 18 provided in the middle part of the holder 8. The tip end is fitted into the recess 25 of the striking plate 21, and a spring pin 28 is attached to prevent the pin 27 from coming off.

In FIG. 3, numeral 31 is a chute for supplying materials to be crushed, and its internal passage is in a zigzag shape as shown in the figure, and numerals 32 and 33 represent repellent plates arranged symmetrically. Repulsion plate 3
2 and 33 are frame 1 with pivots 34 and 35, respectively.
The installation angle is adjusted by operating members 36 and 37.

In the above-mentioned device, when the material to be crushed is supplied from the supply port through the chute 31, the material to be crushed collides with each inclined part of the chute 31 and is sequentially decelerated, and is vertically disposed near the uppermost striking plate 21. fell into
The material is blown away by the impact force of the high-speed rotating impact plate 21, collides with the repulsion plates 32 and 33, and is crushed, or is repulsed and is again impacted by the impact plate 13 and crushed, resulting in such an action. Pieces repeatedly crushed into desired dimensions are discharged from the opening at the bottom, and this is true whether the rotor rotates in the forward or reverse direction.

(3) Problems to be solved by the invention By the way, the striking plate 21 used in the crusher
Since the striking surface 21a is a flat surface with no unevenness, the striking plate 21 and the repulsion plate 3 are
A phenomenon has occurred in which the object to be crushed by the blades 2 and 33 slips on the striking surface 21a. As a result, the impact force is weakened, making it difficult to crush the material to be crushed into fine particles, resulting in extremely poor crushing efficiency and premature wear.

Therefore, the technical object of the present invention is to reduce as much as possible the slipping of the object to be crushed on the striking surface of the striking plate.

(4) Means for Solving the Problems In order to achieve the above-mentioned technical problem, the striking plate according to the present invention is characterized in that a large number of recesses are formed in the striking surface.

(5) Effect During crushing, the object to be crushed is crushed by the striking plate and the repulsion plate, on the striking surface of the striking plate, a part of it enters the recess formed in the striking surface, or a part of the object is crushed between the recess and the striking surface. As the object hits the corner edge, the object to be crushed is crushed while being prevented from sliding on the striking surface, and the object to be crushed is effectively crushed. Next, it is crushed to make it sufficiently fine. On the other hand, the material to be crushed that has entered the recess (although it is relatively fine particles, it is angular) is successively hammered by the material to be crushed that has entered the recess, and is subjected to a fir effect within the recess. The corners are removed to form fine, rounded grains.

(6) Effects of the Invention In this invention, since a large number of recesses are formed on the striking surface of the striking plate as described above, the slippage of the object to be crushed on the striking surface of the striking plate is greatly reduced, and the striking surface As a result, the crushing effect is significantly enhanced, secondary crushing is promoted, and the particles are sufficiently refined, resulting in significantly improved crushing efficiency, less wear, and extended service life. In addition, the fine particles in the crushed material are sized within the recesses by the milling action, making it possible to obtain fine particles of good quality.

(7) Embodiment In FIGS. 1 and 2, reference numeral 51 denotes a striking plate, and a fitting groove 52 is formed in the middle part of the striking plate, and a vertically elongated recess 55 is formed in this fitting groove 52. Hitting surface 51
A large number of hemispherical recesses 57 are formed symmetrically in the front and rear on the front and rear surfaces of one end and the other end of the striking plate 51 (a).

The striking plate 51 configured as described above is similar to the conventional striking plate, for example, after the fitting groove 52 is fitted into the gap between the holders, the tip of the holder pin is inserted into the recess 5.
It is attached by being inserted into the section 5.

In the above description, the shape of the recess 57 is formed into a hemispherical shape, but this is merely an example, and the shape of the recess 57 may be a cylindrical recess or the like. In addition, the recess 57 is formed on all the front and rear surfaces of one end and the other end of the striking plate 51 (4
However, in the case where the rotor body to which the striking plate 51 is attached rotates only in one direction, either forward or reverse, and does not rotate in the other direction, and one end and the other end are reversed. When used as a rotor, it should be provided on two surfaces, the front of one end and the rear of the other end, and it rotates only in one direction and does not rotate in the other direction, and the one end and the other end are reversed. If not used, it may be provided on one surface of the front surface of one end.

[Brief explanation of drawings]

Fig. 1 is a side view of a striking plate showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional front view taken along the - line in Fig. 1, and Fig. 3 is an impact crusher equipped with a conventional rotor. Partial longitudinal cross-sectional front view of , Figure 4 is Figure 3G
FIG. 5 is an enlarged longitudinal cross-sectional view of a portion, and is a perspective view of the same striking plate as above. DESCRIPTION OF SYMBOLS 1... Frame, 2... Rotating shaft, 4... Rotor body, 51... Blow plate, 52... Fitting groove, 57...
...concavity.

Claims (1)

[Claims] 1. A striking plate for an impact crusher that is attached to the peripheral edge of a plurality of rotor bodies attached to a main shaft, characterized in that a large number of recesses are formed in the striking surface.