There are obvious differences in the production principles and operation methods between compression molding and extrusion molding.
- Production principle: Compression molding is a rubber plastic processing method that heats and pressurizes rubber raw materials into products in a closed mold cavity, while extrusion molding adds various vulcanizing agents to the rubber raw materials, and then Extrusion and vulcanization are performed at high temperatures to form rubber products.
- Operation method: Compression molding uses powdered flakes and granular rubber blocks to first make a blank with a shape similar to the finished product, and then closes the mold and pressurizes it to shape and solidify or vulcanize, and finally demoulds to obtain the product. Extrusion molding is formed by throwing the entire silica material into a rubber roller and then extruding and vulcanizing it.
In addition, extruded silicone rubber requires the addition of odorless vulcanizing agents, and both molded silicone rubber and extruded silicone rubber can reach food grade.
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