The barrel of extruder in wire and cable equipment is usually a metal barrel, which is made of alloy steel or composite steel pipe lined with alloy steel.
Its basic characteristics are high temperature and pressure resistance, strong wear resistance and corrosion resistance. Generally, the length of the barrel is 15 ~ 30 times of its diameter, and its length is based on the principle that the material can be fully heated and plasticized evenly.
The barrel should have sufficient thickness and rigidity. The interior should be smooth, but some barrels are grooved to increase friction with the plastic. The electric heater, temperature automatic control device and cooling system for resistance, inductance and other heating methods are attached outside the barrel.