When a rubber product is formed, it is pressed by a large pressure, which cannot be eliminated due to the cohesive force of the elastomer. When forming and releasing the mold, it often produces extremely unstable shrinkage (the shrinkage rate of rubber varies due to different types of rubber) , it takes a period of time to stabilize. Therefore, at the beginning of the design of a rubber product, regardless of the formula or the mold, it is necessary to carefully calculate the coordination. If not, it is easy to produce unstable product dimensions, resulting in low product quality.
