CN113953017A

CN113953017A - Powder processing machinery grinds

Info

Publication number: CN113953017A
Application number: CN202111325881.0A
Authority: CN
Inventors: 綦安宝
Original assignee: Guizhou Brother United Technology Co ltd
Current assignee: Guizhou Brother United Technology Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-01-21

Abstract

The invention discloses a powder processing machinery mill, which comprises a driving roller and a grinding tile surrounding the driving roller, wherein a plurality of grinding racks A are transversely and uniformly arranged on the outer peripheral wall of the driving roller, a plurality of grinding racks B are transversely and uniformly arranged on the inner peripheral wall of the grinding tile, the cross sections of the grinding racks A are isosceles trapezoids, the cross sections of the grinding racks B are bent claw-hook-shaped, and wear-resistant layers such as tungsten carbide and the like are sprayed on the surfaces of the grinding racks B and the grinding racks A so as to increase the wear resistance and avoid the influence of the increase of gaps caused by wear on the crushing performance. For the installation and the disassembly of the directional grinding tile, the grinding tile can adopt 2-3 combination of equal angles, each angle is 180 degrees or 120 degrees, and the grinding tile is movably fixed on the inner wall of the shell through a bolt. The single-spraying wear-resistant layer can be used on two sides, the cost is reduced, the processing efficiency of the grinding rack A is improved by about 10.9% by adopting an isosceles trapezoid, the minimum particle size can reach 5 micrometers, the carbon powder is better in sphericization, and the outlet temperature of the carbon powder can be reduced by about 3.8 ℃.

Description

Powder processing machinery grinds

Technical Field

The invention relates to the technical field of carbon powder processing equipment, in particular to a powder processing mechanical mill.

Background

The carbon powder is mainly used for printers, the processing process mainly comprises the steps of mixing, melting and pressing raw materials into sheets, crushing the sheets into particles, grinding the particles by grinding equipment to reach the qualified particle size, the pneumatic grinding and the mechanical grinding are mainly adopted at present, the pneumatic grinding has high energy consumption, but also has lower efficiency, the machining is mainly mechanical grinding, the cross sections of the grinding racks of the existing mechanical grinding are in claw-hook shapes, the wear-resistant layer is sprayed on the surface, but the claw hook shape can be ground in only one direction, the other direction can not be used even if the claw hook is not worn, and the powder pocket can not be caused, because the claw-hook-shaped shearing surface is an arc shape which changes continuously, the change range of the impact attack angle is larger, therefore, the shearing force and the efficiency are relatively low, the spheroidization effect of the carbon powder is not good, and the shearing and collision times of the carbon powder reaching the standard particle size are increased, so that the outlet temperature of the carbon powder is relatively high.

Disclosure of Invention

The invention aims to provide a powder processing mechanical mill to solve the technical problems in the background technology.

The technical scheme of the invention is as follows:

the utility model provides a powder processing machinery grinds, includes the initiative cylinder and encircles the grinding tile outside the initiative cylinder, and the initiative cylinder periphery wall transversely evenly arranges a plurality of grinding rack A, and grinding tile internal perisporium transversely evenly arranges a plurality of grinding rack B, and wherein grind rack A cross section and be isosceles trapezoid, grind rack B cross section and be crooked claw hook-shaped, all spray-coated with the wearing layer grinding rack B and grinding rack A surface.

Furthermore, the grinding tile is a combination of 2-3 equal-angle tiles, each angle is 180 degrees or 120 degrees, and the grinding tile is movably fixed on the inner wall of the shell through bolts.

Furthermore, the included angle between the top edge and the side edge of the grinding rack A is 120-125 degrees.

Further, the gap between the grinding rack B and the grinding rack A is 1-1.5 mm.

Further, the wear-resistant layer is tungsten carbide.

The invention has the advantages that:

(1) the grinding rack A is in an isosceles trapezoid shape, two surfaces of the grinding rack A can be cut, when one surface is worn, the other surface can be worked only by turning the driving roller 1, and the two surfaces can be used for spraying once, so that the cost for spraying the wear-resistant layer is greatly reduced.

(2) The grinding rack A has better shearing performance by adopting an isosceles trapezoid, the change of the impact attack angle alpha is relatively stable, the processing efficiency can be improved by about 10.9%, the particle size can reach about 5um at least, and the processed carbon powder is better in sphericity.

(3) Based on the increase of the shearing force, the shearing and collision times of the carbon powder reaching the standard particle size can be correspondingly reduced, and the outlet temperature can be reduced by about 3.8 ℃ compared with the existing equipment.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the operation of the present invention;

FIG. 3 is a photomicrograph of carbon powder particles milled by a conventional apparatus;

FIG. 4 is a photomicrograph of the milled carbon powder particles of the present invention.

In the figure: 1-roller, 2-grinding rack A, 3-shell, 4-grinding tile, 5-grinding rack B, alpha-impact attack angle.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-4:

the utility model provides a powder processing machinery grinds, including initiative cylinder 1 and the mill tile 4 of encircleing outside initiative cylinder 1, a plurality of grinding rack A2 are transversely evenly arranged to initiative cylinder 1 periphery wall, a plurality of grinding rack B5 are transversely evenly arranged to the interior perisporium of mill tile 4, wherein grinding rack A2 cross section is isosceles trapezoid, grinding rack B5 cross section is crooked claw hook-shaped, all spray the wearing layer on grinding rack B5 and grinding rack A2 surface, tungsten carbide etc. for example, in order to increase the wearability, avoid wearing and tearing to lead to the clearance increase to influence crushing performance. For the installation and the disassembly of the directional grinding shoe 4, the grinding shoe 4 can adopt 2-3 combination of equal angles, each angle is 180 degrees or 120 degrees, and the grinding shoe is movably fixed on the inner wall of the shell 3 through bolts.

The gap between the grinding rack B5 and the grinding rack A2 is 1-1.5mm, the gap range is not large compared with the gap range of the existing mechanical grinding, the included angle between the top edge and the side edge of the grinding rack A2 is 120-125 degrees, the grinding needs to consider proper impact attack angle alpha and shearing surface, the angle is too large, the shearing surface is large, but the impact attack angle is small, the crushing force is not enough, when the angle is close to 90 degrees, although the impact attack angle alpha is large, the shearing surface is small, the effective processing efficiency can not be achieved, and the powder accumulation condition is easy to occur, and the included angle between the top edge and the side edge of the grinding rack A2 is most suitable when the angle is 120-125 degrees through comprehensive tests.

During grinding, the driving roller 1 drives the grinding rack A2 to rotate at a high speed relative to the grinding rack B5, high-speed high-pressure air flow drives powder to flow axially between the grinding rack A2 and the grinding rack B5, under the action of high-speed centrifugation, the powder with unqualified particle size is thrown to the edge and is cut by the grinding rack B5 and then collides with the grinding rack A2 to be repeatedly cut and crushed, graphite powder is collided and ground mutually, the particles with qualified particle size are quickly discharged out of the equipment along with high-speed air flow suspension, the grinding rack B5 is static due to the protection of rotational flow and centrifugation generated by high-speed rotation of the grinding rack A2, the grinding rack A2 is worn most, so that wear-resistant layers of the grinding rack A2 and the grinding rack B5 need to be regularly sprayed and supplemented, for example, tungsten carbide needs to be sprayed once, ten thousand yuan is consumed, the existing grinding rack B5 and the grinding rack A2 are hook-shaped claws, the grinding rack A2 is directly arranged on the outer wall of the driving roller, the grinding rack A2 can work in only one direction, and powder pocket can be caused by reverse work, so that spraying is needed when a working surface is worn, the grinding rack A2 is isosceles trapezoid, two surfaces of the grinding rack A can be cut, when one surface is worn, the driving roller 1 only needs to be installed in a turning direction to carry out the work of the other surface, and compared with spraying, two surfaces can be used once, and the cost for spraying the wear-resistant layer is greatly reduced.

The grinding rack A2 has better shearing performance by adopting an isosceles trapezoid, the shearing surface is an inclined surface relative to a claw hook shape, the change of the impact attack angle alpha is relatively stable, the claw hook-shaped shearing surface is an arc shape which changes continuously, the change range of the impact attack angle alpha is large, so the shearing force and the efficiency are relatively low, the grinding rack A2 can improve the processing efficiency by about 10.9 percent relative to the claw hook shape, the particle size can reach about 5 mu m at least, the particle size on the market is generally between 8 and 12 mu m, and the impact attack angle alpha is relatively stable, the impact attack angle alpha of the same carbon powder particle is almost consistent in different impact processes, so the processed carbon powder has better sphericization, the circular particle size is higher, and the sphericization is an important index for influencing the subsequent printing effect of the toner.

Based on the increase of the shearing force, the shearing and collision times of the carbon powder reaching the standard particle size can be correspondingly reduced, the temperature of the outlet of the carbon powder can be reduced by about 3.8 ℃ relative to the existing equipment, the carbon powder raw material is prevented from being melted in the cavity, the carbon powder is more beneficial to the production of the carbon powder, and the energy consumption of an equipment cooling system is reduced.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.

Claims

1. The powder processing mechanical mill is characterized in that: including the initiative cylinder with encircle the grinding tile outside the initiative cylinder, a plurality of grinding rack A are transversely evenly arranged to the initiative cylinder periphery wall, a plurality of grinding rack B are transversely evenly arranged to the grinding tile internal perisporium, wherein grind rack A cross section and be isosceles trapezoid, grind rack B cross section and be crooked claw hook-shaped, all spray the wearing layer on grinding rack B and grinding rack A surface.

2. The powder processing mechanical mill according to claim 1, characterized in that: the grinding tile is formed by combining 2-3 grinding tiles with equal angles, each grinding tile is 180 degrees or 120 degrees and is movably fixed on the inner wall of the shell through bolts.

3. The powder processing mechanical mill according to claim 1, characterized in that: the included angle between the top edge and the side edge of the grinding rack A is 120-125 degrees.

4. The powder processing mechanical mill according to any one of claims 1 to 4, wherein: the clearance between the grinding rack B and the grinding rack A is 1-1.5 mm.

5. The powder processing mechanical mill according to any one of claims 1 to 4, wherein: the wear-resistant layer is tungsten carbide.