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Aluminum alloy die-casting, including aluminum, magnesium, zinc alloy series die-casting products, widely used in automotive, telecommunications, motorcycles, home appliances and other industries. Aluminum alloy die casting mold release agent is an assistant used in the production process. Due to the different volume and size of the products, the different complexity of the structure and the different requirements of the post-processing of the products, the requirements of the release agent are also different.
The zinc alloy material is heated and melted (melting point of aluminum is 660.4 ℃), injected into the mold cavity under high pressure in the liquid state, and the top part of the mold is opened in a short time. In order to ensure the smooth demoulding of products, the mold cavity surface is sprayed with demoulding agent before injection.
Aluminum alloy die casting release agent shall meet the following requirements:
1. Oil. As an effective material for metal separation, organosilicon oil is an ideal choice. This kind of silicone oil must have the characteristics of high temperature resistance and no influence on post processing performance (such as aluminum coating).
2. Water property. Due to the high temperature of the mold, any solvent mold release agent is not suitable. In the high temperature environment, the water evaporates rapidly, and the effective substances are distributed evenly on the surface of the mold cavity. Uniform film forming, strong adhesion, high temperature scouring resistance, good demoulding performance.
3. Emulsion. The proper emulsifier is selected to emulsify the silicone oil to prevent its carbonization at high temperature. To keep the surface of products and cavity clean.
4. There is no corrosion to casting and mould equipment. The wheel Gallery of casting products is clear, the surface is smooth and free of marks, which does not affect the coating. The volatiles are smoke-free, non-toxic, not polluting the environment and not damaging the health of operators