A kind of mould, also known as extrusion head, used to form and produce plastic products with continuous shape. It is widely used in the processing of pipes, bars, monofilaments, plates, films, wire and cable cladding, profiles, etc. The corresponding production equipment is the plastic extruder. Its principle is that the solid plastic is melted and plasticized under the conditions of heating and rotating and pressurizing the screw of the extruder, and the continuous plastic products with the same cross-section and die shape are made through the die with a specific shape. Its manufacturing materials mainly include carbon structural steel, alloy tools, etc. Some extrusion dies will also be inlaid with diamond and other wear-resistant materials on the parts that need wear-resistant. Extrusion process is usually only applicable to the production of thermoplastic products, which is obviously different from injection mold and compression mold in structure.
(reprinted from Baidu Encyclopedia)
