As the process equipment directly produced in the production, the forming mold connects the design and production. The forming mold is actually the redesign of the product, which needs to meet the shape requirements of customers as much as possible; on the other hand, the molding mold also needs to consider the actual production process, which needs to facilitate production and improve production efficiency. The main types of foaming raw materials in our company are EPS and EPP. The materials are different and the molding time is different, so the corresponding mold wall thickness is also different. The thickness of EPS mold cavity of EPS foaming machine is 8 ~ 10 mm and EPP is 12 ~ 15 mm. In order to facilitate heating (uniform arrangement of air plug) and cooling, uniform thickness is emphasized.