Application Technology of Aluminum Die Casting Release Agent

Aluminum alloy die-casting, including aluminum, magnesium, and zinc alloy series die-casting products, is widely used in industries such as automobiles, telecommunications, motorcycles, and home appliances. Aluminum alloy die-casting release agent is a necessary additive in the production process. Due to the different volume dimensions, structural complexity, and post-processing requirements of the products, the requirements for release agents also vary.

Zinc alloy material is heated and melted (aluminum melting point 660.4 ℃), injected into the mold cavity under high pressure in liquid state, and the top part of the mold is opened and ejected in a short period of time. To ensure smooth demolding of the product, it is necessary to spray demoulding agent 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 metal isolation, organic silicone oil is an ideal choice. This silicone oil must have the characteristics of high temperature resistance and not affecting post-processing performance (such as aluminum product coating).

2. Water based. Due to the high temperature of the mold, any solvent based release agent is not suitable. Using water as a dispersing medium, in a high-temperature environment, the water evaporates rapidly, and the effective material for demolding is evenly distributed on the surface of the mold cavity. Uniform film formation, strong adhesion, high temperature resistance, and good demolding performance.

3. Emulsion. Choose appropriate emulsifiers to emulsify silicone oil and prevent carbonization at high temperatures. To maintain the cleanliness of the product and mold cavity surface.

4. There is no corrosion to castings and mold equipment. The casting product has a clear contour, a smooth and seamless surface, and does not affect the painting process. Volatile substances are smoke-free, non-toxic, do not pollute the environment, and do not harm the health of operators.