The mold positioning component is what makes the mold work and the mechanism used to deliver a quality end product. Key components include mold bases, pins, ejectors, lifters, bushings, guides, and alignment devices. In-mold injection, the production of plastic parts involves many important factors, involving all areas of part design, tooling, material selection and production. The first is about material considerations.

    Manufacturers often choose familiar plastic grades from similar applications or rely on supplier recommendations. Resins selected in this way may be adequate, but are rarely optimal. Plastic selection is a complex task involving many considerations, such as:

    Temperature: Thermal stress that can occur under normal and extreme conditions of use and during assembly, finishing and shipping.

    Chemical Resistance: The effect that occurs when any solid, liquid, or gas comes into contact with the part.

    Agency Approvals: Government and private standards for properties such as heat resistance, flammability, and electrical and mechanical properties.

    Assembly: The fit of plastic with all assembly steps such as gluing, mechanical fasteners, and welding.

    Finish: The ability of a material to produce the desired finish, such as gloss, smoothness, and other appearance values, when it comes from the mold.

    Cost: Resin pricing and costing of manufacturing, maintenance, assembly, and disassembly to reduce labor, tooling, finishing, and other costs.

    Availability: The availability of the resin in the quantity required to produce it.

    Taizhou Huangyan Jinhong Plastic Mould Parts Co., Ltd. is an injection mold manufacturer from China , its own plastic mold factory specializes in the production of plastic compression springs