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Precise injection mold refers to resin materials into metal models get a certain shape of product installations. In fact in order to control mold temperature, on the mold or cool the refrigerant through the hole, heaters and other devices. Has become the molten material into the sprue, runner, runner injection mold cavity. After a cooling period of mold is opened, ejecting device on the machine ejector ejector rod, will launch products. Take shape is created by forming molten resin flows into the sprue, runner guide molten resin into the mold cavity and posed by products. We're equal runner lengths are typically designed. Recycled materials used in forming the sprue and the runner is not a product, and sometimes drop or crush materials after use it again. We call it return. Return as a molding material not be used alone, usually mixed with new material after use. This is because after one forming, resin's mechanical performance, mobility, color and other characteristics change.