What causes the rust of the plastic bottle cap mold?

The plastic bottle cap mold market is a market with huge demand, many market segments and high competition pressure. More and more manufacturers have joined the plastic bottle cap mold market, and diversified and differentiated plastic bottle caps are constantly being introduced. However, everyone does not understand that plastic bottle cap molds are also very easy to rust. So, what is the reason for plastic bottle cap molds to rust under normal circumstances?

Usually, the cause of the rust of the plastic bottle cap mold is the gas generated after the melt is overheated and decomposed. If it occurs when the molding is suspended, the corrosive gas around the plastic bottle cap mold is mold rust. Therefore, when the injection molding is stopped, the mold must be wiped with a clean soft cloth, and the mold must be closed when it is not molding to prevent corrosion caused by the gas generated by other surrounding injection machines. When closing the plastic bottle cap mold, remember to apply butter, and don't forget to plug the mold. If the molding is stopped for a long time, rust inhibitor should be sprayed in the mold cavity, and the mold cavity should be used before spraying. Wipe clean with a soft cloth to confirm that there is no rust spots.

If the surface of the mold cavity is stained with slag carbides, which causes the rust of the plastic mold, it should be removed in time; the carbides precipitated and decomposed in the molding material often cause the mold to wear or corrode. Once found, it should be wiped off with a dry cloth.

Generally, although the electroplating layer in the mold cavity is conducive to rust prevention, it is not completely effective. Sometimes the corrosive gas will cause deep corrosion through the pores on the surface of the coating layer. The method to avoid the corrosion of the coating layer is to wipe the plastic bottle cap mold frequently.

Cooling water in the mold can easily cause the plastic bottle cap mold to rust. If the mold is cooled below zero, the moisture in the air will form water droplets on the surface of the mold, and it will rust if it is not wiped off. Although the molding process will not be exposed, condensed water will be generated immediately after the molding is stopped. It is best not to stop the molding during the production process. Even if it is stopped, the cooling water should be turned off and the surface of the plastic bottle cap mold should be wiped dry.

When the above situation occurs, it is necessary to ensure that the protection work can be done in time, so that the plastic bottle cap mold is not easy to rust.