Effects of cold-rolling on the cold forging of solid polymer

摘要

Cold-forged products obtained from preliminarily-rolled rods of HDPE, PP, POM, ABS and PVC were studied for their elastic and thermal recovery, and secular change of dimension over time. The optimum amount of reduction of area in rolling, and theeffect of heat treatment, were made clear in order to attain the best qualities of cold-forged products. The cold-forged products obtained from preliminary-rolled rod were found to have extremely good dimensional stability when subjected to heat treatment in a boiling-water bath. This cold-forging process was applied to make small machine parts such as knobs, good results being obtained.