Aluminum alloy die casting includes aluminum, magnesium, and zinc alloy series die-casting products, which are widely used in automobiles, telecommunications, motorcycles, home appliances and other industries. Aluminum alloy die-casting release agent is a must-use additive in the production process. Due to the different volume and size of the product, the complexity of the structure, and the post-processing requirements of the product, the requirements for the release agent are also different.
Zinc alloy material is heated and melted (aluminum melting point 660.4°C), injected into the mold cavity under high pressure in a liquid state, and the top part of the mold is opened and molded in a short time. In order to ensure the smooth release of the product, the release agent must be sprayed on the surface of the mold cavity before injection.
Aluminum alloy die-casting release agent must meet the following requirements:
1. Oil. As an effective material for intermetallic isolation, silicone oil is ideal. This silicone oil must be resistant to high temperatures without affecting post-processing properties (e.g. aluminum coating).
2. Water-based. Since the mold is in a high temperature state, any solvent-based release agent is not suitable. Water is used as the dispersion medium, and the water evaporates rapidly in a high-temperature environment, and the release active material is evenly distributed on the surface of the mold cavity. Uniform film formation, strong adhesion, high temperature scouring resistance, and good release performance.
3. Emulsion. Choose the right emulsifier to emulsify the silicone oil to prevent it from carbonizing at high temperatures. to keep the surface of the product and mold cavity clean.
4. There is no corrosion on castings and mold equipment. The wheel corridor of the casting product is clear, and the surface is smooth and traceless, which does not affect the painting. Volatile substances are smokeless, non-toxic, do not pollute the environment, and do not harm the health of operators.