JP2535291B2 - Crusher tooth plate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tooth plate of a compression type crusher such as a cone crusher, a gyre trellis crusher, a roll mill, a double roll crusher and a jaw crusher.

[0002]

2. Description of the Related Art Conventionally, a tooth plate of a crusher of this type has a long life, prevents slipping of a crushed object to improve crushing efficiency, or improves a crushing mechanism to improve a grain shape of a product. In order to achieve the above, it is formed as a pair by casting a material with high wear resistance such as high manganese cast steel (or cast iron) or high chrome cast steel (or cast iron), and at least one of its effective thickness parts (use It is configured to have a number of straight or spiral grooves that do not intersect with each other on the part from the crushing surface at the time of crushing to the wear limit) and crush the object to be crushed by biting it between the two. (See Japanese Patent Publication No. 3-5854 and Japanese Patent Publication No. 4-3259).

[0003]

However, since the tooth plate of the above conventional crusher is usually made of high-manganese cast steel, the relationship of the mold (sand mold), that is, the sand mold ridges that form the grooves are cast. Since it is damaged by tapping of hot water at the time, for example, as in the mantle 21 and the cone cape 22 of the rotary crusher shown in FIG.
Cannot have a sufficiently small width W. Therefore, the chance of sandwiching the crushed object M between the crushing surfaces 24 is reduced, and the crushing ability is lowered along the side surface of the groove 23 to enter the inside thereof, or as shown in FIG.
The side surface of No. 3 is abraded and the strength of the protrusion 25 between the grooves 23 is reduced. Further, when the tooth plate is new, the edge 26 of the groove 23 is sharp, so that the object M to be crushed may bite into the toothed plate and the predetermined crushing ability cannot be exhibited from the beginning of use. For this reason, normally required required operation (for example, about 50 hours) is required. Therefore, an object of the present invention is to provide a tooth plate of a crusher that can have a groove width that is sufficiently narrow with respect to the size of the crushing gap and the size of the material to be crushed and that can exhibit a predetermined crushing ability from the beginning of use. And

[0004]

In order to solve the above problems, the tooth plate of the crusher of the present invention is formed by forming a pair by casting a material having high wear resistance, and at least one of them has an effective wall thickness. In a tooth plate of a crusher that has a large number of linear or spiral grooves in its portion and crushes by crushing an object to be crushed, at least opposing side walls of each groove are cast-in low-wear-resistant plate materials Is formed by.

[0005]

In the above-mentioned means, at least both side surfaces of the sand-shaped ridges serving as the grooves of the tooth plate are covered with the plate material having low wear resistance, and the plate material is welded to the main body made of the material having high wear resistance after casting. The edges of the grooves are immediately worn and become rounded at the beginning of use when new. The plate material may have a U-shaped cross section that also covers the upper surface of the ridge, or may be connected by a wire or the like suspended between the upper edges of the plate materials on both sides. High manganese cast steel (or cast iron) or high chromium cast steel (or cast iron) is used as the material with high wear resistance, and a plate material made of mild steel such as SS41 is used as the plate material with low wear resistance. To be

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a cone cave and a mantle of a rotary crusher according to an embodiment of the present invention, and FIG. 2 is a bottom view of the cone cave of the rotary crusher shown in FIG. The cone cave 1 of this rotary crusher has a truncated cone-shaped mantle 2
Together with it, it is provided in the shape of a truncated cone in order to form the crushing chamber 3 with a wedge-shaped cross section. Is formed. In the effective wall thickness portion of the cone cave 1, a large number of grooves 4 each having a rectangular cross section that becomes narrower from the upper side to the lower side and extending linearly in the same direction as the generatrix are appropriately spaced in the circumferential direction. The side walls of the grooves 4 facing each other are formed of a plate material 5 made of mild steel such as SS41 having a low wear resistance, which is integrally cast with the main body of the cone cave. In addition, the plate material 5 is the groove 4
Need not be provided over the side wall of the entire length, and as shown in FIG. 3, for example, it may not be provided in a wide groove portion (for example, 20 mm or more), while the narrow groove portion may be about 1 mm. Good. Further, the groove 4 is not limited to be in the same direction as the generatrix, and may be slanted to the front lower side in the turning direction of the mantle 1, or may be slanted in the opposite direction, or may be spiral. Further, a large number of grooves whose side walls are made of the same plate material may be formed in the effective wall thickness portion of the cone cave 2, or a smooth crushed surface may be formed without the grooves.

In order to manufacture the cone cave 1 having the above-mentioned structure, as shown in FIG. 4, after the plate materials 5 having low wear resistance are arranged on both side surfaces of the ridge 7 of the wooden mold 6, the sand molds 8 on the inner side and the outer side are formed. ，
Make 9. Then, after removing the wooden mold 6 from between the sand molds 8 and 9, when the sand molds 8 and 9 are combined and hot water of high manganese steel is poured, the opposite side walls of the groove 4 are cast as shown in FIG. The corn cave 1 is formed by the plate material 5 thus formed. Cone cave 1 produced in this way
The mantle 2 and the mantle 2 have both side walls of the ridge 10 (see FIG. 4) of the sand mold 8 reinforced by the plate material 5 and the strength of the ridge 10 is enhanced, so that the ridge 10 is damaged by tapping of hot water during casting. I will not receive it. For this reason, as shown in FIG. 6, the cone cave 1 and the mantle 2 formed by the plate material 5 having the opposite side walls that are cast around and welded to the main body portion.
The widths of the grooves 4 and 11 can be made sufficiently small with respect to the crushing gap S and the particle diameter D of the crushed object M, and the respective ridges 12 and 13 can be set to an effective width for crushing. The smashing of the crushed material M into the grooves 4 and 11 was swept away. Further, since the edges of the grooves 4 and 11, that is, the side edges of the protrusions 12 and 13 are made of the plate material 5 having low wear resistance, they are immediately worn into a rounded shape at the beginning of use in a new article. Therefore, the object M to be crushed does not bite into the edge, and a predetermined crushing ability can be exhibited from the beginning of use.

The structure of the above-mentioned tooth plate is not limited to both the cone cave and the mantle of the rotary crusher, but either one of them, a roll mill, a double roll crusher,
It is needless to say that the present invention can be applied to both or either of the pair of tooth plates of the jaw crusher or other compression type crusher.

[0009]

As described above, according to the tooth plate of the crusher of the present invention, at least both side surfaces of the sand-shaped ridges that form the grooves of the tooth plate are covered with the plate material having low wear resistance. The ridge will not be damaged by tapping the hot water. For this reason, the groove width of the tooth plate formed by the plate material welded to the main body by facing the opposite side walls can be sufficiently reduced with respect to the crushing gap and the particle size of the crushed object, and the ridges are crushed. The effective width can be set, and the crushing ability of the object to be crushed into the groove can be swept away, and the crushing ability can be remarkably improved. In addition, since the edge of the groove is immediately worn and becomes rounded at the beginning of use when a new product is used, the crushed material does not bite into the edge, so that no habituation operation is required and a predetermined amount is set from the beginning of use. It can exert its crushing ability.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a cone cave and a mantle of a rotary crusher according to an embodiment of the present invention.

FIG. 2 is a bottom plan view of a cone cave of the rotary crusher shown in FIG.

FIG. 3 is a side view of a part of a cone cave of a rotary crusher according to another embodiment of the present invention.

4 to 5 are partial cross-sectional plan views showing respective manufacturing steps of the cone cave shown in FIG. 1.

FIG. 6 is a plan sectional view for explaining the relationship between the cone cave and mantle of the rotary crusher shown in FIG. 1 and the crushed object.

FIG. 7 is a plan sectional view for explaining the operation of the cone cave and mantle of the rotary crusher shown in FIG.

8 to 9 are plan cross-sectional views illustrating the relationship between a tooth plate of a conventional crusher and an object to be crushed.

[Explanation of symbols]

 1 Cone cave 2 Mantle 3 Crushing chamber 4 Groove 5 Plate material with low wear resistance

Claims (1)

(57) [Claims] 1. A crushed object is bitten by forming a pair by casting a material having high wear resistance and having a large number of linear or spiral grooves in at least one of its effective wall thickness portions. In the tooth plate of the crusher for crushing according to claim 1, at least the side walls of each of the grooves facing each other are formed by a plate material having low wear resistance formed by casting.