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Extrusion System of Twin  Extruder ?
Extrusion System Screw
The extrusion system of single screw extruder is composed of screw and barrel. Screw is a critical component. [http://www.extruderschina.com/<b>Plastics Extruder</b>]With screw's rolling motion the material in the barrel moves ahead, then gets pressurized and creates some friction heat. At the end [http://www.extruderschina.com/ <b>Twin Screw Extruder Supplier</b>] megatitude of constant pressure is conveye to the head of the machine.

The Evolution of Twin Screw Extruder
The first twin screw extruder[http://www.extruderschina.com/<b>Steel Pipes Coating</b>] was born in Italy in 1930s. During late 60s and early 70s, it got a rapid evolution. Intermeshing counter rotating twin[http://www.extruderschina.com/<b>Coating Plant For Steel Pipe</b>] screw extruder was developed with the progress of RPVC products while intermeshing co rotating twin screw extruder was developed with the modification process of polymers. It is a consensus all around the world that the extrusion theory is behind the actual application.

And the volume of hopper should contain the extrusion capacity at least 1- 1. 5 hours. The shape of feeding port can be either an rectangle, which is the preference, or a circle. The feeding way can be manual or automatic. Automatic feeding device mainly consists of blast-furnace burden, spring feeding, vacuum suction and so on.