Die is an important tool used in the process of tire vulcanization. In the process of use, die is inevitably polluted by the comprehensive deposition of rubber, compound and release agent used in the process of vulcanization (the main pollutants are sulfide, inorganic oxide, silicone oil, carbon black, etc.) Repeated use will cause some pattern pollution dead zone; Therefore, in order to ensure that the mold can be used normally, it must be cleaned regularly.