The use of high-quality copper material, high stability, good corrosion resistance, oxidation resistance, good electrical conductivity, a wide range of working temperature and solution concentration; the lead wire adopts high temperature resistant fiber thread and the way of outsourcing copper ribbon to make the lead wire resistant Wearing and durable; the connection of the copper electric heating ring is connected with the heating element by a copper cap, and silver fiber welding is used to make the copper electric heating ring completely closed and more durable. It is widely used in injection molding machine, plastic machinery, packaging and printing, petrochemical industry, electronic equipment, etc.