Causes and Solutions of Injection Mold Rust

Causes and Solutions of Injection Mold Rust

Most of injection molds are made of chisel tool steel. During the molding, it encounters corrosive gases, water and other substances that cause rust. And Plastic parts made from rusty molds will have quality problems, so we need to know how to avoid the rust.

Causes and Solutions of Injection Mold Rust

Here are the causes and solutions of the rust:

Gas from melt decomposition

Some raw materials will produce volatile gases when heated or overheated. These gases are corrosive and diffuse around the machine. When injection mold is not working, they will corrode the mold.
In this regard, when the machine stops working, use a soft cloth to clean the mold and close the mold. If it is not used for a long time, the mold cavity should be sprayed with anti-rust agent.

Cooling water in the mold

Cooling water is often used in the mold to wake up and cool, so there is more moisture around the machine. If the mold is cooled below the dew point, the moisture in the air will form water droplets on the surface of the mold. If it is not wiped off in time, it will rust easily.
Especially after the mold stops working, condensed water will soon be generated. Therefore, do not stop molding easily, even if you want to stop, turn off the cooling water and wipe the mold dry.

Carbides produced during molding

After the mold works for a long time, carbides are precipitated and decomposed in the molding material, which often causes the mold to wear, corrode or rust. In this regard, if carbide formation is found, it should be wiped off and wiped off with a dry cloth immediately.


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