Extrusion mold intro
Extrusion, especially cold extrusion, material utilization rate is high, material structure and mechanical properties are improved, simple operation, high productivity, can make long rod, deep hole, thin wall, shaped section parts, is an important less cutting process.Extrusion is mainly used for metal forming, but also for plastic, rubber, graphite and clay blank and other non-metal forming.In the 17th century the French used a manual screw press to extrude lead pipes, which were used as water pipes, to start the process of cold extrusion.Cold extrusion of zinc, copper and copper alloys was realized in the late 19th century, and expanded to extrusion of aluminum and aluminum alloys in the early 20th century.In the 1930s, the germans invented phosphating and saponifying surface anti-friction lubrication treatment technology, which made the cold extrusion of steel successful.After the second world war, the cold extrusion of steel was extended to other countries and expanded its application.Since the adoption of the molten glass lubrication method in the 1950s, hot extrusion of steel has been applied and developed in the metallurgical and mechanical industries.
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