JP2894919B2 - Grinding roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing roll for crushing an object having a small frictional resistance such as an ice block into a predetermined size.

[0002]

2. Description of the Related Art As a conventional object crushing apparatus, for example, there is known an apparatus in which a pair of rolls each having a cutting edge portion formed in a mountain shape are opposed to each other. Width (pitch), roll spacing (clearance)
Arbitrarily, a sharp particle size distribution can be obtained. Further, as a powder ice machine for crushing ice, for example, as shown in Japanese Utility Model Publication No. 60-9655, the size of a container is adjusted by adjusting the particle size of ice pieces by a rotating blade, a fixed blade, and a particle size adjuster. An apparatus capable of obtaining a piece of ice of a suitable size is known.

[0003]

However, the former device is suitable for crushing various foods, chemicals, pharmaceuticals, etc.
When crushing an object with low frictional resistance, such as ice blocks, the object slips on a pair of opposing rolls, and does not enter between the rolls, so that the crushing process may not be performed properly. There was a problem. or,
According to the latter ice-powder machine, an object such as ice having a small frictional resistance can be crushed, but there is a problem that a sharp particle size distribution with less generation of fine powder cannot be obtained. In view of the above problems, an object of the present invention is to provide a crushing roll capable of crushing an object having a small frictional resistance such as ice into the same shape and obtaining a sharp particle size distribution. I do.

[0004]

In order to solve the above-mentioned problems, the present invention provides a pair of crushing rolls for crushing an object into a predetermined size, wherein a surface of each crushing roll is provided with a blade portion in a circumferential direction. A plurality of crushing blades having a pair of convex portions in which concave grooves are alternately arranged are provided in the axial direction at intervals.
Further, the blade portion and the concave groove of the crushing blade are arranged in parallel to the axis, and the interval between the blade edges in the pair of convex portions and the interval between the crushing blades adjacent to each other are the same. Are preferably shifted from each other in the axial direction by the distance between the cutting edges. Each crushing roll is formed of stainless steel, and the tip of the blade portion of the crushing blade preferably has a substantially triangular cross section.

[0005]

According to the present invention, on the surface of each crushing roll, crushing blades having a pair of convex portions in which blade portions and concave grooves are alternately arranged in the circumferential direction are provided in the axial direction at intervals. Since a plurality of objects are provided, even if the object has a small frictional resistance such as an ice block, the object can enter the concave groove between the blade portions, and the object does not slide on the crushing roll. . Therefore, the object can be smoothly crushed by being bitten between the crushing rolls. In addition, the interval between the cutting edges in the pair of convex portions and the interval between the crushing blades adjacent to each other are the same, and the pair of crushing rolls are displaced in the axial direction by the interval between the cutting edges. Therefore, the space formed in the cutting edge portion has the same shape, and after the pulverization, an object having the same interval and thickness can be obtained.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the crushing apparatus A according to the present invention for crushing an input hopper 1 for inputting an object (not shown) having a small frictional resistance such as ice blocks, and for crushing the object supplied from the input hopper 1. A pair of crushing rolls 2, 2 'and crushing rolls 2, 2' are rotatably accommodated, and a crushing chamber 4 provided on a gantry 3 and an object crushed by the crushing rolls 2, 2 'are discharged to the outside. And a discharge chute 5. A drive motor 6 is provided on the gantry 3.
The rotational force of the driving motor 6 includes a plurality of gears 7 attached to the shaft of the driving motor 6, gears 8 and 9 attached to the rotating shaft 2a of the crushing roll 2, and gears attached to the rotating shaft 2'a of the crushing roll 2 '. It is transmitted to a pair of grinding rolls 2 and 2 ′ via 10. In addition, 11 is a caster for movement.

FIGS. 2 to 5 are explanatory views showing the structure of a pair of crushing rolls 2 and 2 'according to the present invention. Each of the crushing rolls 2 and 2 'has the same configuration. As is apparent from FIG. 5, the blade portions 20a and the concave grooves 20b are alternately arranged on the surface of each of the crushing rolls 2 and 2' in the circumferential direction. A plurality of crushing blades 20 having a pair of convex portions 20c are provided in the axial direction at intervals. Blade 20a of crushing blade 20 and groove 2
0b is parallel to the axis. Also, a pair of convex portions 20
c, the interval (M) between the cutting edges 20d of the blade portions 20a (see FIG. 3) and the interval (N) between the crushing blades 20 adjacent to each other.
Are formed to have the same length. Further, the pair of crushing rolls 2 and 2 ′ are arranged so as to be shifted from each other in the axial direction by an interval (M to N) between the blade edges 20 d of the blade portion 20 a.

As the material of each of the crushing rolls 2 and 2 ', iron, stainless steel or the like can be used, but stainless steel which does not generate rust is preferable. The length of the blades of the grinding rolls 2 and 2 ', the length of the groove, the distance between the blades of the grinding rolls, and the like are appropriately determined depending on the size of the particle size of the pulverized material. For example, 5 mm thick ice is crushed to a particle size of 2830 μm to 5 μm.
When crushing to a size of 00 μm, the circumferential length (K) of the blade portion 20a of the crushing roll is 3 to 5 mm, the circumferential length (L) of the concave groove is 2 to 3 mm, The interval (M) between the cutting edges 20d of the portion 20a and the interval (N) between the crushing blades 20 adjacent to each other are 2.5 to 3 mm, the interval (clearance) between the crushing rolls is 0 to 3 mm, and the blade portion 20a of the crushing roll.
Is preferably adjusted within the range of 4 to 5 mm (see FIG. 3).

The number of rotations of the crushing roll is 25 to 100 rpm
It is preferably within the range of m. If the rotation speed is lower than this, the production efficiency decreases, and if the rotation speed is high, the amount of fine powder increases. The shape of the tip of the blade portion 20a of the crushing roll may have a substantially quadrangular cross-section, a substantially triangular cross-section, or the like, but is most preferably a triangular shape that contacts an object such as ice at a point and can prevent the generation amount of fine powder. When an object is thrown into the charging hopper 1, the object falls into the crushing chamber 4 and is crushed by the pair of crushing rolls 2 and 2 '. On the surfaces of the pair of crushing rolls 2 and 2 ', the blade portion 20a and the concave groove 20 are arranged in the circumferential direction.
Since a plurality of crushing blades 20 having a pair of convex portions 20c in which b are alternately arranged are provided in the axial direction at intervals, even if the object has a small frictional resistance such as an ice block,
Since the object can enter the concave groove 20b between the blade portions 20a, the object does not slide on the crushing rolls 2, 2 '. Therefore, the object can be smoothly engulfed between the crushing rolls 2 and 2 'and crushed with a sharp particle size distribution.

The interval between the cutting edges 20d in the pair of convex portions 20c and the interval between the adjacent crushing blades 20 are the same, and the pair of crushing rolls 2 and 2 'are axially displaced from each other by the distance between the cutting edges 20d. Because they are arranged shifted in the direction,
The shape (R) of each space defined by the blade portion 20a (shaded portion in FIG. 3) becomes the same, and after pulverization, an object having a shape having the same interval and thickness can be obtained. The crushed object is
It is discharged outside by the discharge chute 5. While the preferred embodiment of the present invention has been described above, various changes may be made to the embodiment disclosed within the scope of the technical matters described in the claims without departing from the scope or spirit of the invention. Obviously you can do that.

[0011]

According to the present invention, a pair of crushing blades having a pair of convex portions on the surfaces of a pair of crushing rolls in which blade portions and concave grooves are alternately arranged in the circumferential direction are spaced apart from each other by an axial line. Since it is provided in a plurality of directions, even if the object has a small frictional resistance such as an ice block, the object can be inserted into the concave groove between the blade portions, so between the pair of grinding rolls The object can be smoothly bitten and pulverized with a sharp particle size distribution with less generation of fine powder. In addition, the interval between the cutting edges of the pair of convex portions and the interval between the crushing blades adjacent to each other are the same, and the pair of crushing rolls are arranged so as to be axially shifted from each other by the interval between the cutting edges. The shape of the space defined by the blade portions becomes equal, and after pulverization, an object having the same interval and thickness can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire configuration of a pulverizing apparatus using a pulverizing roll of the present invention.

FIG. 2 is a plan view showing a configuration of a grinding roll of the present invention.

FIG. 3 is an enlarged plan view showing a blade edge portion of a crushing roll of the present invention.

FIG. 4 is a side sectional view of a main part showing a grinding roll of the present invention.

FIG. 5 is a perspective view of a main part showing a configuration of a crushing blade of each crushing roll.

[Explanation of symbols]

 A: Pulverizing device 1: Input hopper 1, 2, 2 '... Pulverizing roll 3 ... Stand 4 ... Pulverizing chamber 5 ... Discharge chute 6 ... Drive motor 20 ... Pulverizing blade 20a ... Blade part 20b ... Groove 20c ... Convex part

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B02C 18/00-18/44 F25C 5/04 302 B02C 1/00-7/18

Claims (4)

(57) [Claims] 1. A pair of crushing rolls for crushing an object into a predetermined size, wherein each of the crushing rolls has on its surface a pair of convex portions in which blade portions and concave grooves are alternately arranged in a circumferential direction. A crushing roll characterized in that a plurality of crushing blades are provided in the axial direction at intervals. 2. A blade portion and a concave groove of the crushing blade are arranged in parallel to an axis, and a distance between blade edges in a pair of convex portions;
The distance between adjacent crushing blades is the same, and the pair of crushing rolls are arranged to be shifted from each other in the axial direction by the distance between the cutting edges.
A grinding roll as described. 3. The crushing device according to claim 1, wherein each of the crushing rolls is made of stainless steel. 4. The crushing device according to claim 1, wherein a tip of the blade portion of the crushing blade has a substantially triangular cross section.