Grinding device used for powder paint

Abstract

The invention discloses a grinding device used for powder paint. The grinding device comprises a shell, a main mill and multiple layers of auxiliary mills. The main mill is arranged at the bottom of an inner cavity of the shell, all the auxiliary mills are located above the main mill and longitudinally arranged at intervals, a main mill motor for driving the main mill to rotate and an auxiliary mill motor for driving all the auxiliary mills to rotate are arranged at the bottom and the top of the shell correspondingly, a feeding mechanism, a silicon adding mechanism and an induced air pipe communicating with the inner cavity of the shell are arranged on the peripheral wall of the lower portion of the shell, a discharging pipe communicating with the inner cavity of the shell is arranged on the peripheral wall of the upper portion of the shell, and the discharging pipe is connected with a cyclone separator. Through arrangement of the multiple layers of auxiliary mills, large-particle powder is broken multiple times, the broken powder is separated through the cyclone separator so that the powder paint with the good grain diameter evenness can be obtained, the leveling performance of the thin-coating powder paint is achieved, and the leveling performance of the common powder paint is improved. Meanwhile, the air volume of the cyclone separator is adjusted, so that good grain diameter control is achieved, and the leveling performance of the thin-coating powder paint can be achieved.

Description

technical field [0001] The invention relates to the field of milling devices, in particular to a milling device for powder coatings. Background technique [0002] The processing of powder coatings is generally divided into several processes: mixing, hot-melt extrusion, tablet cooling, milling and screening ingredients, among which milling is an indispensable link, and the level of milling efficiency has a great impact on the quality of powder coatings. great influence. At present, when the existing milling device is working, due to the fact that the flakes crushed by the main mill and the auxiliary mill pass through the rotary sieve during the crushing process, the powder particle size distribution range is wide and the particle size uniformity is inconsistent, resulting in The leveling performance of the powder after electrostatic spraying is not good, especially for powder coatings with thin coatings (coating thickness 20 μm-50 μm), the leveling performance is poor. Con...

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Problems solved by technology

At present, when the existing milling device is working, due to the fact that the flakes crushed by the main mill and the auxiliary mill pass through the rotary sieve during the crushing process, the powder particle size distribution range is wide and the particle size uniformity is inconsistent, resulting in The leveling performance of the powder after electrostatic spraying is not good, especially for powder coatings with thin coatings (coating thickness 20μm-50μm), the leveling performance is poor

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