JPH05317733A - Crusher - Google Patents

Abstract

PURPOSE:To lengthen durability of a tooth plate without regard to the property of a material to be crushed. CONSTITUTION:In a crusher of the compression type having a movable tooth and fixed tooth for gripping and crushing a material to be crushed, the movable tooth and/or fixed tooth are formed from high chromium cast steel or cast iron 3 into which reinforcing bars 2 having high tensile strength are cast. The movable tooth and/or fixed tooth are formed from high manganese cast steel and high chromium cast steel having high hardness, so that cracks of high chromium cast steel etc., are prevented by means of the reinforcing bars, or even when cracks occurs in the high chromium cast steel etc., the high chromium cast steel etc., can be firmly held by the reinforcing bars.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compression type crusher such as a jaw crusher, a cone crusher or a gyre trellis crusher, and more particularly to a compression type crusher having an improved tooth plate structure.

[0002]

2. Description of the Related Art Conventionally, as a crusher of this kind, a crusher in which moving teeth for crushing an object to be crushed and fixed teeth are made of high manganese cast steel has been widely used. this is,
This is because the high-manganese cast steel is excellent in strength and has a merit that the tooth plate surface becomes hard due to work hardening due to crushing (Hs≈70) (as a prior art document, Japanese Patent Publication No. 57-57).
No. 23542).

[0003]

However, in the above-mentioned conventional crusher, when water or mud is mixed in the object to be crushed or the object to be crushed itself has a high hardness like silica rock, Prior to the work hardening, which is the most characteristic of manganese cast steel, wear or scraping of the tooth plate surface occurs, so the tooth plate surface is operated (Hs ≈ 35) while being soft, and the life of the tooth plate is extremely high. It was getting shorter.

In order to deal with this, the moving teeth and the fixed teeth of the crusher are made of high chromium cast steel or cast iron which does not require work hardening and is harder than high manganese cast steel and excellent in wear resistance. Although high-chromium cast steel or cast iron has excellent hardness, tensile strength,
It was inferior in toughness and cracked and fell off during operation, so the life of the toothed plate could not be extended and it was never adopted.

Therefore, an object of the present invention is to provide a compression type crusher which can prolong the life of a tooth plate regardless of the property of the crushed object.

[0006]

In order to solve the above-mentioned problems, the crusher of the present invention is a compression type crusher having moving teeth and fixed teeth for biting and crushing an object to be crushed. And / or the fixed teeth are formed of high-chromium cast steel or cast iron in which reinforcing bars having excellent tensile strength are cast.

[0007]

In the above means, the moving teeth and / or the fixed teeth are made of high chromium cast steel or cast iron having a hardness higher than that of high manganese cast steel, and cracks of the high chromium cast steel are prevented by the reinforcing bar, or the high chromium cast steel is used. Even if cracks occur in the etc., the high chromium cast steel etc. is firmly held by the reinforcing bar.

The reinforcing bars are preferably provided by welding the deformed bars in a grid pattern and by welding them to a grid-shaped base frame that is cast around the back surface of the tooth plate.

[0009]

Embodiments of the present invention will now be described with reference to the drawings. 1, FIG. 2, FIG. 3 and FIG. 4 are a front view, a plan sectional view, a side sectional view and a rear view with a part thereof omitted, in which a part of a moving tooth of a jaw crusher according to an embodiment of the present invention is cut away. .

The moving teeth 1 of this jaw crusher are made of high-chromium cast steel or high-chromium cast iron 3 in which reinforcing bars 2 having excellent tensile strength are cast, and are formed on the surface in the vertical direction with wavy corrugations. It is provided in a flat plate shape.

The reinforcing bar 2 is formed into a lattice-shaped base frame 6 by vertically and horizontally welding a flat bar 5 to an angle member 4 welded in a frame shape, and the deformed bars 7 and 8 welded to the base frame 6 in a lattice shape. Welded and lattice-shaped deformed muscles 7,
The required structure 8 is welded to the base frame 6 by the deformed bar 9 in the thickness direction of the moving tooth 1 to form a frame structure.

As shown in FIG. 5, the moving tooth 1 of the above jaw crusher is, as shown in FIG. 5, covered with an upper die 12 on a casting mold 11 in which a frame structure 10 serving as a reinforcing bar is placed, and then from a sprue 13 It is manufactured by pouring high chrome cast steel or high chrome cast iron, and is attached to the body of the jaw crusher via the base frame 6 on the back surface. In FIG. 5, reference numeral 14 is a riser.

In the above embodiment, the moving teeth of the jaw crusher have been described, but the present invention is not limited to this, and the invention is not limited to this, and it may be applied to the fixed teeth of the jaw crusher or both the moving teeth and the fixed teeth. It may be applied, or may be applied to the moving teeth and / or fixed teeth of a compression type crusher such as a cone crusher or a gyre trek crusher.
Further, the invention is not limited to the tooth plate of the crusher, but may be applied to the impact plate or liner of the impact crusher.

[0014]

As described above, according to the crusher of the present invention, the moving teeth and / or the fixed teeth are made of high chromium cast steel or cast iron having hardness higher than that of high manganese cast steel, Cracks are prevented by the reinforcing bars, or even if cracks occur in the high-chromium cast steel, etc., the high-chromium cast steel etc. are firmly held by the reinforcing bars. The life of the tooth plate can be significantly extended regardless of the properties of the crushed object, compared with those formed from high chromium cast steel or the like.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a jaw crusher according to an embodiment of the present invention.

FIG. 2 is a plan sectional view of moving teeth of the jaw crusher shown in FIG.

FIG. 3 is a side cross-sectional view of moving teeth of the jaw crusher of FIG.

FIG. 4 is a rear view of the jaw crusher of FIG. 1 with some of the moving teeth omitted.

5 is a cross-sectional view showing a method for casting the moving teeth of the jaw crusher shown in FIG.

[Explanation of symbols] 1 Dynamic tooth 2 Reinforcing bar 3 High chrome cast steel or high chrome cast iron 4 Angle material 5 Flat bar 6 Base frame 7 Deformed bar 8 Deformed bar 9 Deformed bar

Claims (1)

[Claims] 1. A compression type crusher having a moving tooth and a fixed tooth for biting and crushing an object to be crushed, wherein the moving tooth and / or the fixed tooth is cast around a reinforcing bar excellent in tensile strength. A crusher characterized by being formed from high-chromium cast steel or cast iron.