Extruder is one of the types of plastic machinery, originated in the 18th century.

The extruder can be divided into right angle head and oblique angle head according to the direction of the head material flow and the angle of the screw center line.

The screw extruder relies on the pressure and shear force generated by the screw rotation, which can make the material fully plasticized and evenly mixed, and is molded through the die.

Plastic extruders can be basically classified into twin-screw extruders, single-screw extruders and rare multi-screw extruders and screw-free extruders.