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Injection mold in the processing, are generally batch formation, so our team technical method and process of injection mould is very important, if in the process, not according to the provisions of the requirements, will damage the injection mold and. Therefore, the analysis process of injection mold processing method of Chinese bearing network provides:
1, raw materials generally does not require drying, 2 hours of individual case 80 degrees bake;
2, forming a wide range of temperature, heating melting and curing speed, so the molding cycle generally shorter; the temperature parameter: barrel temperature around 200 c, material high temperature to the silver, and the material will make poor transparency temperature too low;
3: the mold temperature, mold temperature control in general 50-80 c;
4, GPPS good fluidity, plastic beer is not needed in the high pressure (usually injection pressure about 10Mpa), so as to avoid excessive increases plastic stress -- may cause cracking (especially the paint decoration process);
5, properly high injection speed straight to weaken the clip water lines, but because the injection speed by injection pressure influence of large, high speed may cause flash or die mold sticking out of the top and top white top crack problems;
6, the appropriate pressure: if the back pressure is too low, the rotation of the screw is easy to overflow into the air, the barrel material particle density is small, the plasticizing effect of particles is not good, the influence of rubber parts surface quality (general back pressure is 10-20kg/cm2); g) the mold design for general fine nozzle 0.8-1.0mm.h) glass fiber reinforced PS-GF30, cylinder temperature is 180~275, the mold temperature is 20~80, shrinkage of 0.1~0.2. density 1.29/cm3.