Compared with the floating dyeing method, the liquid coloring method has the same ratio of main raw materials and pigments, but the former has better production and operation environment, not only does the pigment fly, but also reduces the pollution to the environment, and the quality of dyeing products can be better guaranteed.
The color matching operation sequence of the liquid color coloring method is as follows: measure the pigment and dispersant (PE wax) according to the ratio requirements → mix → heat and stir evenly → grind the evenly mixed color paste particles fine in the three-roll grinder → measure the grinding fine color paste and resin according to the ratio, and then add to the mixer, mix and stir evenly → put into the injection machine for production.
Mixing of resin and pigment can be done with a mixer.
The working method of the three-roll grinder is very simple. The three cold cast iron rollers rotating at high speed are driven by the motor through a V belt, a gear reducer, and a set of transmission gears. The size of the gap of the working face of the three rollers should be adjusted manually when the color paste is passed through the gap of the three rollers. When the color paste passes through the gap of the roller surface, the larger diameter particles are crushed and refined, which increases the fineness of the pigment particles and improves the diffusion effect of the pigment in the resin, so that the pigment and the resin can get a more uniform mixture.