How to solve the rust of the drawing die
First, the cause of mold rust
There are three main reasons for mold rust:
1. The product of the decomposition of the molding material.
2. The resurgence of molds.
3. Sweaty hands.
Second, the relevant analysis of mold rust
1. The products (gas, residue) decomposed by the forming material are also very common to the corrosion of the mold. In order to prevent the mold from rusting, we generally use chrome plating on the mold cavity, but the chrome plating treatment cannot completely solve the problem. Because decomposing organisms also corrode the deep part of the pin hole. And these places are places where there is no way to plate them.
2. When the mold is cooled below the moisture regain point, the moisture in the air will regain moisture on the mold surface and produce water droplets, which will lead to rust.
3. Solve the problem of mold rust
1. Short-term: wipe the surface of the mold cavity with a cloth by hand. Fully dry the molding material, reduce the temperature of the barrel, and prevent the material from decomposing. When temporarily stopping molding, spray rust inhibitor into the mold cavity, and then close the mold.
2. Long-term: Turn the product material into a material that will not be corroded by decomposition products. Materials that are easily decomposed include PVC, POM, EVA, PC, and foam. Since the decomposition products have a corrosive effect on the mold, if the plastic raw material cannot be replaced, the mold should be chrome-plated. When the mold is not used for a long time, apply a layer of butter to the outside of the mold and the movable parts.