Sand mill

Abstract

The invention provides a sand mill. The sand mill comprises a rack, a motor, a grinding cylinder, a main shaft, multiple dispersion disc supports, multiple dispersion discs, a cooling core and a return pipe. The motor is fixedly connected to the rack. The grinding cylinder is arranged on the right side of the motor and fixedly connected with the rack. The center of the grinding cylinder is provided with a through hole, the left side of the bottom of the grinding cylinder is provided with a feeding opening, the right side of the top of the grinding cylinder is provided with a discharging opening, and the upper portion of the right side of the grinding cylinder is provided with an overflow opening. One end of the main shaft is fixedly connected with the motor, the other end of the main shaft is provided with a blind hole, and the main shaft is connected with the grinding cylinder. The dispersion disc supports are evenly and fixedly connected to the periphery of the main shaft. The dispersion discs are arranged on each dispersion disc support in parallel. The cooling core is arranged in the blind hole and fixedly connected with the rack. One end of the return pipe is connected with the overflow opening, and the other end of the return pipe is connected with the feeding opening. By the adoption of the technical scheme, pigment near the main shaft is good in fluidity, the pigment flows through the overflow opening and flows in or out of the grinding cylinder circularly to be fully ground in the flowing process, the pigment is fully dispersed and evenly mixed, and the dispersion efficiency is improved.

Description

technical field [0001] The invention relates to the field of pigment processing, in particular to a sand mill. Background technique [0002] In the existing technology, it is necessary to disperse and refine the organic pigments during pigment processing. Commonly used dispersing and grinding equipment includes ball mills, sand mills, three-rollers, etc., among which the grinding effect of sand mills is the best, but now The working principle of some sand mills is: the main shaft drives the dispersing disc to rotate, and then drives the grinding medium to move at high speed to produce extrusion, friction, and shearing effects, so that the pigments are dispersed and mixed. However, due to the centrifugal force, there is a grinding dead angle around the main shaft. The pigment distribution in this area is less, the pigment cannot be fully dispersed, and the dispersion effect is poor and the efficiency is low. If the method of prolonging the grinding time is used to solve this...

AI Technical Summary

Problems solved by technology

However, due to the centrifugal force, there is a grinding dead angle around the main shaft. The pigment distribution in this area is less, the pigment cannot be fully dispersed, the dispersion effect is poor, and the efficiency is low.

If the method of prolonging the grinding time is used to solve this problem, it will not only waste resources, but also cause the temperature of the sand mill to be too high, and the effective components of the pigment are easily decomposed.

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