The difference between the production process of compression-molded cosmetic caps for plastic cosmetic caps
and the production process of injection-molded caps:
1. The injection mold is large in size, and it is troublesome to replace a single cavity; each cavity formed is relatively independent and can be replaced separately.
2. The compression-molded cover has no pour point, the appearance is more beautiful, and the printing effect is better.
3. Fill all the mold cavities at one time by injection molding, and extrude 1 cap material each time. The extrusion pressure of compression molding is very small, while the pressure required for injection molding is relatively high.
4. The injection molding cover needs to heat the material to a molten state, and the temperature is about 220 degrees; the compression molding cover only needs to be heated to about 170 degrees, and the energy consumption of the injection molding cover is higher than that of the compression molding cover.
5. The compression molding temperature is low, the shrinkage is small, and the coverage size is more accurate.