Extrusion mold is the core part of extrusion production

Extrusion mold is the core part of extrusion production. The technical status of extrusion mold is directly related to the stability of extrusion production, the quality of extruded products, extrusion production efficiency and the service life of the mold itself. Therefore, the design of the extrusion mold is very important. When designing the machine head, the following points should be paid attention to:

The inner cavity of the machine head should be streamlined

In order to make the material squeeze out evenly along the flow path of the machine head and avoid the material from being overheated and decomposed due to stagnation, it must not be sharply reduced in the machine head, let alone dead corners and stagnant areas. It is recommended to make the flow path as smooth as possible. Surface roughness Ra value is 0.4μm

Sufficient compression ratio

According to the different types of plastic products and plastics, design a head that can produce a sufficient compression ratio to eliminate the joint seam caused by the shunt bracket and make the product compact.

Correct section shape

Due to the performance, pressure, density, shrinkage and other factors of the plastic, the shape of the die forming section of the die is different from the real section shape of the product. This factor should be considered in the design to make the die of the die have a reasonable cross-sectional shape. .

Compact rhythm, easy to disassemble

Under the condition of satisfying the mechanical properties, it is necessary to design a head with rhythmic entry, tight joints, uniform heat transfer, convenient disassembly and assembly, and no material leakage.

Reasonable selection

The machine head should be made of steel with corrosion resistance, friction resistance, good tensile strength and high hardness. Some have to be chrome-plated according to the situation.