Plastic mold is of multiplex varieties and specification. Due to it’s complicated shapes and low surface roughness, it is rather difficult to be manufactured. Therefore, it seems very important to comprehensively analyze it’s working condition and performance so as to improve the service life, ensure processing quality and reduce production cost.
According to different molding and solidification, plastic mold falls into such two type as thermoset plastic mold and thermoplastic plastic mold. The plastics, during the working of thermoset plastic molds, are solid powder material or prefabricated blank materials, which are added into the cavity and molded through thermal pressing under certain temperature. The force applied thereon is large; friction is also large due to the impact it is subject to; thermal mechanical load and abrasion is large. Plastics for thermoplastic plastic mold are injected or pressed into the cavity under viscous flow state, wherein the deformation resistance is relatively smaller and the heat, pressure and abrasion applied on the mold are usually not very serious. However, when solid fillers are added therein, the abrasion will increase enormously.