What are the characteristics of precision injection molding molds

Nowadays, the requirements for plastic products are getting higher and higher, resulting in precision injection molding processing technology. Today, Wo Neng Mold Development Xiaobian will introduce the characteristics of precision injection molding processing molds.

1. Wear resistance

When the blank is plastically denatured in the mold cavity, it moves and slides along the surface of the cavity, causing intense friction between the surface of the cavity and the blank, which causes the mold to fail due to wear. Therefore, the wear resistance of the material is one of the most basic and important properties of the mold. Hardness is an important factor affecting wear resistance. In general, the higher the hardness of the mold parts, the smaller the amount of wear and the better the wear resistance. In addition, wear resistance has nothing to do with the type, quantity, state, size and distribution of carbides in the material.

2. Strong toughness

Most of the working conditions of the mold are very harsh, and some often bear a large impact load, which leads to brittle fracture. In order to prevent the mold machine from being brittle suddenly during work, precision metal molds must have high strength and toughness. The toughness of the mold mainly depends on the carbon content, grain size and structure of the material - precision mold manufacturing.

3. Fatigue fracture function

During the working process of the mold, under the long-term effect of the cyclical response force, it often leads to fatigue and fracture. Its forms include small energy repeated impact fatigue fracture, tensile fatigue fracture, contact fatigue fracture and bending fatigue fracture. The fatigue fracture performance of the mold mainly depends on its strength, toughness, hardness, and the content of inclusions in the material.

4. Low temperature function

When the working temperature of the mold is high, the hardness and strength will be reduced, leading to early wear or plastic deformation of the mold and failure. Therefore, precision injection molds should have high stability against tempering to ensure that the mold has high hardness and strength at working temperature.

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