What is the role of the screw barrel in the plastics processing industry?- Zhoushan Jiading Plastic Machinery Co., Ltd.

In the plastic processing industry, the screw barrel is an indispensable key component and plays an important role. Screw barrels are usually used in plastic extrusion, injection molding, blow molding, etc., and their main function is to heat, melt and extrude solid plastic raw materials into desired shapes. So, what are the specific functions of the screw barrel in plastic processing?

First of all, the screw barrel plays the role of mixing and heating in plastic extrusion. The plastic particles pass through the melting area of the screw barrel and gradually melt into a molten state under the action of high temperature and high pressure. At the same time, the rotation of the screw mixes the raw materials evenly to ensure the uniformity of the plastic.

Secondly, the screw barrel plays a vital role in the plasticization and extrusion of plastics. The thread structure and heating system inside the screw barrel enable the melted plastic to be extruded evenly to form the desired shape. Different plastic raw materials require different extrusion parameters, so the design and adjustment of the screw barrel has a direct impact on production efficiency and finished product quality.

In addition, screw barrels play a key role in processes such as injection molding and blow molding. In the injection molding process, the screw barrel injects molten plastic raw materials into the mold, and plastic products are obtained after cooling and solidification. In the blow molding process, the screw barrel blows the molten plastic into various hollow containers.

Single screw and barrel for injection machine

Screw can be matched with different heads, and barrel can be matched with different nozzles.

Small parts of injection molding machine: screw tip(screw head), check valve, ring, barrel head and flange, nozzle.

Material: special alloy steel, after vacuum quenching and other heat treatment process, can greatly improve the service life of screw tip.