What Is an Extruder Screw Barrel?

The extruder screw barrel is an important part of the extruder, usually referring to the combination of the screw and barrel (or barrel) in the extruder. The following is a detailed explanation of the two parts:

Screw

Function: The screw is a key component of the extruder. It is responsible for heating and melting the plastic raw materials in the barrel, and through its rotation and propulsion, it continuously and evenly extrude the molten plastic material out of the mold.

Structure: The screw is usually made of alloy steel and has different thread shapes and sizes to meet the processing needs of different plastics. Its design usually includes parts such as the conveying section, the melting section and the metering section to ensure the uniformity and stability of the plastic during the extrusion process.

Barrel

Function: The barrel is the place where the screw rotates and the plastic material is heated and melted. It is usually made of heat-resistant and wear-resistant alloy steel or stainless steel to ensure that it can still maintain good mechanical properties and corrosion resistance under high temperature and high pressure.

Structure: The barrel usually has an inner hole that matches the screw to ensure the smooth rotation of the screw therein. In addition, the barrel is usually equipped with a heating element and a cooling system to control the heating and melting process of the plastic material.

Combined action

When the screw rotates in the barrel, it transports the plastic raw material from one end of the barrel to the other, and completes the steps of heating, melting and extrusion in the process. This combined action enables the extruder to continuously and efficiently produce plastic products of various shapes.

Application field

Extruder screw barrel is widely used in the plastic processing industry, such as the production of plastic pipes, plastic plates, plastic films, plastic wires and other products. In addition, it also plays an important role in other fields such as rubber, food, chemical industry and other industries. When selecting and using it, it is necessary to fully consider its material, structure, processing accuracy and other factors to ensure the normal operation and long-term stability of the extruder.