Plastics shrinkage causes the deformation of injection molded parts.The pressure gradient,temperature gradient and shear stress in the cavity make nonuniform shrinkage.

• 注塑件变形始于塑料的收缩,型腔中压力梯度、温度梯度以及剪切应力的客观存在导致了注塑件各部位收缩的不均一。