Injection mold parts for medical devices is the abbreviation for a combination mold used for compression molding, extrusion, injection, blow molding and low foam molding. The coordinated changes of the convex and concave molds and the auxiliary molding system can process a series of plastic parts of different shapes and sizes. Plastic molds are the mother of industry, and now the release of new products involves plastics. It mainly includes a concave mold with a variable cavity composed of a concave mold combination base plate, a concave mold assembly and a concave mold combination card plate, which is composed of a punch combination base plate, a punch assembly, a punch combination card plate, a cavity cutting component and A punch with a variable core composed of side-cut composite panels. In order to improve the performance of plastics, various auxiliary materials, such as fillers, plasticizers, lubricants, stabilizers, colorants, etc., must be added to the polymer to become a plastic with good performance.