① Try not to use release agent. When it must be used, only dry release agent or neutral release agent can be used to lightly spray the moving mold (commonly known as “back mold”), but the injection molded parts that need to be plated must not be used. When spraying, pay attention to that the oil stains cannot splash on the fixed mold (commonly known as “front mold”). If possible, it is best to use the smear method to prevent the release agent from splashing to the location where the front mold needs to be sprayed, but if it is applied too much, it may leave oil stains on the outer surface of the injection molded part during injection. You need to be more careful when spraying silver oil.
②Keep the mold clean. There are many oil stains on the mold at the beginning of production, and it is difficult to clean up after a long time of production. Therefore, it must be thoroughly cleaned with a detergent (commonly known as “mold washing water”) before production. For plastic parts that need to be sprayed with silver oil in subsequent processes, the cavity of the mold should be cleaned regularly and thoroughly.
③Plastic parts of soft PVC materials need to be immersed in water, and there must be no oil stains in the water. The water-filled basin cannot be placed under the injection molding machine to prevent the machine oil from dripping into the water. Because this is a place that is not very noticeable, sometimes there will be a case where a large number of injection parts drop oil after injection and no reason can be found.
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