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Material requirements for plastic moulds
- Jun 14, 2017 -

The working condition of the plastic mould is different from the cold stamping die, generally must work under the 150, besides under the certain pressure effect, but also must withstand the temperature influence. Based on the use of plastic molding mold conditions, the different processing methods of plastic mold steel basic performance requirements are summarized as follows:

1, enough surface hardness and wear resistance

The hardness of the plastic mold is usually below the 50-60, after the heat treatment of the mold should have enough surface hardness to ensure that the mold has enough stiffness.

2, good cutting processing

Most plastic molding molds, in addition to EMD processing also need to carry out a certain amount of machining and fitter repair. In order to prolong the service life of cutting tool, improve cutting performance and reduce surface roughness, the hardness of steel for plastic mould must be suitable.

3. Good polishing performance

High-quality plastic products require that the surface roughness of the cavity is small.

4. Good thermal stability

Plastic injection mold parts are often more complex shape, after quenching difficult to process, so should be used as far as possible to choose a good thermal stability, when the mold forming process after heat treatment due to small expansion coefficient, heat treatment deformation small, temperature difference caused by small size change rate, metallographic microstructure and mold size is stable, can reduce or no longer processing, you can guarantee the mold size accuracy and surface roughness requirements.