Plastic molds and injection molds are molds. There are similarities and differences.

Plastic mold is a combination of plastic mold for compression, extrusion, injection, blow molding and low-foaming molding. It mainly includes a die with variable cavity composed of a die combination board, a concave die assembly and a concave die combination card board, which is composed of a punch combination substrate, a convex die assembly, a punch combination card board, a die assembly and a die…

Discoloration means the surface color of a molded part is not consistent with the required color. Discoloration may be caused by a variety of reasons, which may cover the several aspects of injection molding machine, mold, process and raw materials, etc.

(1) Injection Molding Machine

① Equipment is not clean and needs to be cleansed. Dusts or powders are deposited in the barrel, which contaminates and discolors the materials;

② Temperature control failure caused by…