The SMC mold design mold usually uses a hydraulic press. The upper and lower parts of the mold are fixed on the press. The mold includes a cavity core, which is the same as the injection mold. The mold material is placed on the open mold, and then the press is closed. The set temperature and the pressure generated by the press melt the raw material into the cavity of the mold. The test materials for molds are usually SMC, BMC, and GMT.
The SMC mold is designed as a sheet-reinforced thermoplastic material and is generally used for large products. Such products require greater strength. The BMC material is agglomerate, rich in short fibers, has superior mechanical properties, low shrinkage, and color. Stable, GMT material is a glass fiber reinforced thermoplastic that can be widely used in various parts of the car body, can replace the traditional metal parts, reduce weight and reduce costs. Unlike the injection mold, the SMC mold needs heating instead of cooling. The usual heating methods are steam, oil, electricity, and high-pressure water.
The temperature of the SMC mold design is usually between 140 and 160. When designing the temperature system of the mold, special attention must be paid to keeping the temperature of the entire surface of the mold consistent. The uniform temperature can reduce the distortion, improve the dimensional stability, and uniform the surface of the product. In the new generation of mold software, the manufacturability evaluation mainly includes mold design and manufacturing cost estimation, mold assembly evaluation, mold part manufacturing process evaluation, mold structure and formability evaluation. The new generation of software should also have assembly-oriented functions, because the function of the mold can only be reflected through its assembly structure. After adopting the assembly-oriented design method, mold assembly is no longer a simple assembly of parts one by one. Its data structure can not only describe the function of the mold, but also define the assembly characteristics of the relationship between mold parts and components, and realize the correlation of parts. Can effectively guarantee the quality of the mold.