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Introduction to corrosion resistance of injection mold cavity steel
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Introduction to corrosion resistance of injection mold cavity steel

Views: 2     Author: Site Editor     Publish Time: 2023-03-03      Origin: Site

Introduction to corrosion resistance of injection mold cavity steel

With regard to injection mold corrosion, it is important to pay attention not only to the function of the outside, but also to the function of the inside. Corrosive components produced by injection molding materials and moisture in the air will promote oxidation of the steel surface, leading to corrosion. The corrosion resistance of injection mold cavities depends on the steel.

It is well known that when the injection mold cavity or core is equipped with a complex cooling loop, if the steel with excellent corrosion resistance is not selected, the cooling efficiency will decrease over time due to internal corrosion. The surface of the cavity of the plastic injection molding metal mold will be corroded by oxidation of the surface of the steel due to the gas and corrosion components generated by the resin and the moisture in the atmosphere. The surface is treated in order to avoid corrosion on the surface of the cavity.


The injection mould steel SUS630 shows particularly excellent corrosion resistance after modification. This steel is precipitation-hardened stainless steel, containing 0.07%C, 4%Ni, 17%Cr, 4%Cu, 0.15 ~ 0.45 Nb + Ta composition. The hardness is 35 ~ 40HRC. Because the machinability is not very good, so it is necessary to explore the cutting method. In order to further improve corrosion resistance, plasma CVD spraying or hard chromium coating on the surface is a very effective means.

The surface corrosion of injection mold cavity will cause the surface quality of the mold cavity to decline and the size to be out of tolerance, and reduce the life of the mold. The mission of Fanstar is to master the core technology of injection molding production, communicate and analyze the technology before mold production with customers from the production needs of finished products, so that the mold delivery time is short, the life is long, the mass production is fast and the finished product quality is excellent! Have the need of injection molding mold welcome to contact us!




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