The microstructure and mechanical properties of Dalian extrusion molding materials have been improved, with simple operation and high productivity. It can make long rod, deep hole, thin wall and special-shaped section parts. It is an important less and no cutting process. Extrusion is mainly used for metal forming, but also for non-metal forming such as plastic, rubber, graphite and clay blank. It is a processing method of continuously making various cross-section products or semi-finished products through the machine head while being heated and plasticized and pushed forward by the screw.

It is the main factor affecting plasticization and product quality. The temperature of extruded pipe is generally low and the viscosity is high, which is conducive to setting. Freezing line - the line that has been cooled and shaped on the blown tube film; The farther the freezing line is, the slower the cooling speed is, and the film is easy to tear laterally. Pressure forming is to exert strong pressure on the metal blank placed in the die cavity to force the metal blank to produce directional plastic deformation and extrude it from the die hole of the extrusion die, so as to obtain the required section shape.

Part of the metal flow direction of the blank is the same as the movement direction of the punch, and the other part of the metal flow direction is opposite to the movement direction of the punch. Extrusion molding has great flexibility. Products with different shapes, specifications and varieties can be produced on one equipment only by replacing extrusion tools such as molds. The operation of replacing extrusion molds is simple, fast, time-saving and efficient.

Improve the deformation capacity of raw materials. The metal material is in a state of strong triaxial compressive stress in the extrusion deformation zone, which can give full play to its plasticity and obtain large deformation. Simple process flow and less equipment. Compared with pipe and profile processes such as perforation rolling and pass rolling, silicon steel: silicon steel is mainly used to make iron cores of various transformers, motors and generators, which is relatively easy to extrude. Because copper and aluminum have good ductility, extrusion oil with oily agent and good sliding property can be selected, and chlorine containing additives can be avoided.