JPS61136446A - High-speed grinder in pulverizer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a high-speed grinder, and relates to a high-speed grinder in a pulverizer that combines microbite disks of different hardness and particle size.

[Conventional technology]

Conventionally, this type of high-speed grinder has been proposed in which a rotating disk and a stationary disk are combined, which are made of a grindstone made of the same material with low hardness. However, as mentioned above, in this type of disc, the rotating disc and the fixed disc are made of the same material and the same abrasive grain, so the rotating disc wears out several times faster than the fixed disc. The disadvantage was that the wear rates of the upper and lower disks were extremely unbalanced. In addition, the discs currently in use (material [
A%WC%C1GC, etc.) is a type in which old abrasive grains separate from the surface due to surface wear, and the material is ground by the new abrasive grains, so the separated abrasive grains are used as impurities to crush the target material. As a result, if the target substance requires high purity, it cannot be used as a pulverizer.

It is also conceivable to simply form both the rotating disk and the stationary disk with a highly hard material, such as diamond or boron nitride;
Boron nitride disks are prone to distortion after heat treatment and molding, so it is not easy to make precise corrections to the entire surface of the disk. If the rotating disk comes into contact with the stationary disk when the rotating disk is used at high speed, there is a risk that high heat and damage will occur and the life of the expensive disk will be shortened.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a high-speed grinder with a long service life in which wear of the opposing upper and lower disks constituting the entire grinding section of a fine grinder and separation of abrasive grains are reduced.

Another object of the present invention is to provide a high-speed grinder in a pulverizer that is easy to manufacture and extremely versatile.

[Means for resolving the gap @]

The high-speed grinder in the pulverizer according to the present invention includes a pair of opposing rotating disks and fixed disks,
The surface of the rotary disk facing the fixed disk is formed into an ultra-hard ground surface, while the fixed disk is formed of a material having a hardness lower than the hardness of the ground surface of the rotating disk.

In a preferred embodiment, the rotating disk is formed into a concave shape with a concave portion.

〔Example〕

1 to 3, a high-speed grinder 2 for a fine pulverizer according to the present invention has one set of discs, namely a rotating disk 3 and a fixed disk, which constitute micro-bites of different hardness and particle size. 4t-equipped. The rotating disk 3 is fixedly mounted on a shaft 6 which is connected to a rotating machine 5 of the pulverizer 1. On the other hand, a fixed disk 4 disposed opposite to the rotating disk 3 is fixed to a hopper 7 for feeding raw materials.

Of these, the rotating disk 3 has a base 11 and a pace Il.
The rotary disk 3 as a whole has a concave shape with a recess 13 all over. The grinding surface 12 is formed using an ultra-hard material such as diamond or boron nitride having a ring Knoop hardness of about 7000 to 3500. The grain size of the abrasive grains on this grinding surface 12 is coarse at the center, medium at the middle, and fine at the outer periphery, and the grain size gradually decreases from the center to the outer periphery.

Furthermore, the grinding surface 12 of the rotating disk 3 has a higher hardness than the fixed disk 4, and the abrasive grains are made finer.
It is sharp and has sufficient grinding power.

The four-way fixed disk 4 has a concave portion 13 in the rotating disk 3.
The grinding wheel (for example, its material are A, WC, C, GC, etc., and when the ground surface 12t of the rotating disk 3 is made of diamond, the stationary disk 4 is made of boron nitride or a material with a lower hardness than boron nitride). be. Furthermore, the grain size of the abrasive grains on the fixed disk 4 is the same as or relatively coarse compared to the grain size of the abrasive grains on the grinding surface 12 of the rotating disk 3. Therefore, it becomes possible to easily capture all the target material to be crushed within the space formed by the grinding surface 12 of the rotating disk 3 and the fixed disk 4. Note that, like the rotating disk 3, the fixed disk 4 is preferably formed to have a fine grain size on the outer circumferential side while keeping in mind the grain size of the abrasive grains in the center. The part indicated by the reference numeral 9 is a part for temporarily holding the added substance. As a result, the wear of the rotating disk 3 is significantly reduced, so that the degree of clearance expansion during operation is significantly reduced. Further, since the grinding force of the grinding surface 12 is excellent, the grinding force effectively acts as a filter effect around the discharge port 8, and particles with high precision can be obtained.

In particular, since the rotating disk 3t is shaped like a mortar, a strong grinding force is generated on the inclined surface of the mortar due to centrifugal force.
On the other hand, since the load on the fixed disk 4 is relatively reduced, wear on the abrasive surface and detachment of abrasive grains are reduced. Moreover, the cyclone phenomenon ensures more precise classification and grinding effect.

This high-speed grinder 2 is designed to feed the material to be crushed into the space between the opposing surfaces of both disks, and to move the material to be crushed outward by the centrifugal force generated by the rotation of the rotary disk 3 and to release the material. Next, we actually used this high-speed grinder 2 (disc diameter 18 cm, particle addition mesh on the grinding surface, rotation speed 1500).
~1800 rpm, clearance between both discs 0.
Item 05) When coarsely ground chicken carcass was crushed in the presence of a refrigerant using T-T, a colloidal substance in which bone powder of 10 μm or less was dispersed in a paste-like meat protein was obtained. t
o Rotating disk 3 before and after crushing the chicken shell,
The wear condition of the fixed disk 4 was completely measured and Fig. 4A is shown.
As shown in Figure 4B.

ht, It, 12O relationship u h+ ht #O
, It It#0.

Figure 05 shows another embodiment of the present invention. This embodiment has a rotating disk product and a fixed disk 34t in a flat shape, and can be used for materials that are relatively easy to crush and grind.

Furthermore, if the material to be crushed is relatively hard or the shape of the crushed particles is uneven such as flattened or spindle-shaped, and a higher degree of grinding is required, a rotating disk 43 having a shape as shown in FIG. 6, A fixed disk is required. in this case,
The centrifugal force generated by the high speed forces the material against the stationary disk 44 and causes it to be cut.

At this time, coarse particles stay closer to the center due to the cyclone phenomenon caused by the difference in the particles of the substance, and fine particles escape toward the outer periphery, thereby making the product particle size uniform.

In addition, in the example, the whole bird's body shell was crushed? I showed it, but
It goes without saying that this high-speed grinder can be used to finely grind foods, fuels, paints, medicines, organic and inorganic chemicals, electronic materials, microorganisms, metals, and the like.

〔Effect of the invention〕

As described above, according to the present invention, highly accurate grinding is possible.
There is little variation in particles, and fine pulverization is possible in a short time.

Further, according to the present invention, since the wear of the rotating disk is significantly reduced, it is possible to reduce the amount of detached abrasive grains mixed into the material to be crushed, thereby increasing the purity of the product.

Furthermore, as a characteristic effect of the present invention, since the wear of the rotating disk can be reduced, the frequency of correcting the enlargement of the clearance and the frequency of repairing, modifying, and replacing the disk shape can be reduced, so that work efficiency can be increased.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view showing the high-speed grinder according to the present invention in use, FIG. 2 is an enlarged cross-sectional view showing the high-speed grinder according to the present invention, FIG. 3 is a schematic cross-sectional view showing its operating condition, and FIG. FIG. 4B is a schematic cross-sectional view showing the state of the high-speed grinder before all the material is ground; FIG. 5 is a schematic cross-sectional view showing the state after grinding; FIG. 5 is a schematic cross-sectional view showing the operating state of another high-speed grinder; FIG. 2 is a schematic cross-sectional view showing another embodiment. 1J So Figure 3 Figure 4A Figure 48 Procedural amendment December 21, 1949 Manabu Shiga, Commissioner of the Japan Patent Office 2. Name of the invention: High-speed grinder in a pulverizer 36 Relationship with the case of the person making the amendment Patent application Address: 87-302 Iki Danchi, Nishi-ku, Fukuoka City Name: Long
Michi Omasa (and 1 other person) 4, Agent address: 1-19-6-401 Nishi-Shinbashi, Minato-ku, Tokyo
Contents of start correction

Claims (4)

[Claims] (1) A pair of opposing rotating disks and fixed disks are provided, and the surface of the rotating disk facing the fixed disk is formed into an ultra-hard ground surface, and the fixed disk is formed into a ground surface of the rotating disk. A high-speed grinder in a pulverizer, characterized in that it is made of a material with a hardness lower than that of . (2) A high-speed grinder in a pulverizer according to claim 1, wherein the rotating disk is formed in a mortar shape having a recessed portion. (3) The grinding surface of the rotating disk has a Knoop hardness of 3500
7,000 to 7,000, and the hardness of the fixed disk is approximately two-thirds or less of the hardness of the grinding surface of the rotating disk. Grinder. (4) A high-speed grinder in a fine pulverizer according to claim 1, wherein the abrasive grains on the grinding surface of the rotating disk are formed to be finer than the abrasive grains on the stationary disk.