Application in plastic processing machinery and mold cooling, which can greatly improve the plastic products surface smoothness, reduce plastic products surface marks and internal stress, so that the product does not shrink, not easy to deformation, plastic products mold release, accelerated the forming of products, thereby greatly improving the production efficiency of the plastic molding machine; application in plastics processing machinery mould cooling, which can greatly improve the plastic products surface smoothness, reduce plastic products surface marks and internal stress, so that the product does not shrink, not easy to deformation, plastic products mold release, accelerated the forming of products, thereby greatly improving the production efficiency of the plastic molding machine.