Mold rust is a relatively easy phenomenon. It not only affects the appearance of the mold, but also directly affects the overall quality of the mold, so mold rust is a problem that can not be ignored. The following are the reasons and measures for analysis, for your reference.
The cause of the rust of the mold is 1, the formation of the decomposition of the molding material. 2, the tide of the mold. 3, hand sweating.
The related analysis of the rust of the die;
1, the most common corrosion of the moulds is the product (gas and residue) of the decomposition of the molding material. In order to prevent rusting, the most widely used way is chrome plating on the mold cavity, but chrome plating can not solve the problem adequately, because the decomposed product also has corrosion on the deep part of the pin hole. And these places are just where they can't be plated.
2, when the mold is cooled to the moisture regain, the moisture in the air is moisture on the surface of the mold and produces water beads, and rust will occur.
To solve the problem of mould rust;
1, short-term; hand cloth graze the surface of the mold cavity. The molding material is fully dried and the barrel temperature is lowered to prevent the material from decomposing. When the molding is temporarily stopped, the mold cavity is sprayed with the antirust agent, and then the die is closed.
2, for a long time; to turn the product material into a material that has no corrosion to the mold. Easily decomposed materials include PVC, POM, EVA, PC, and foamed materials. Because the decomposition of the product has a corrosive effect on the mold, for the plastic raw material can not be changed, the mould should be chrome plated. When the mold is used for a long time, a layer of butter is coated on the outside of the mold and in the active part.
