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Pay attention to the surface maintenance of the mold, it directly affects the surface quality of the product, the focus is to prevent rust, so it is especially important to choose a suitable, high-quality, professional anti-rust oil. After the preform mold has completed the production task, different methods should be used to carefully remove residual injection molding according to different injection molding. Copper rods, copper wires and professional mold cleaning agents can be used to remove residual injection molding and other deposits in the mold, and then air-dry. Do not clean hard objects such as iron wires and steel bars to avoid scratching the surface. If there are rust spots caused by corrosive injection molding, use a grinder to grind and polish, and spray professional anti-rust oil, and then store the mold in a dry, cool and dust-free place.