Explanation of terms related to injection molding (1)
1. What is the shrinkage of plastics and what are the basic factors affecting the shrinkage of plastics? After the plastic is taken out from the mold and cooled to room temperature, the characteristic of dimensional shrinkage is called shrinkage. Because this shrinkage is not only caused by the thermal expansion and cold shrinkage of the resin itself, but also related to various molding factors, the shrinkage of plastic parts after molding is called molding shrinkage. The main factors affecting the shrinkage rate include: (1) plastic variety; (2) Plastic structure; (3) Die structure; (4) Molding process.2. What is the fluidity…