Home > News >

How to choose mold release agent for metal die casting

A die-casting release agent is a kind of functional substance between the mold and the finished product. It is a type of processing aid that prevents the metal molded product from sticking to the mold and plays the role of easy detachment. Due to the rapid development of die-casting technology, the amount of release agents has also been greatly increased. The choice of release agent The commonly used release agents are inorganic, organic, and high polymers.

Inorganic release agent:
As talc powder, mica powder, pottery clay, white clay, etc. as the main components of the composite configuration, mainly used as a release agent for the film and semi-finished products in rubber processing.

Organic release agent:
Including fatty acid soap (potassium soap, sodium soap, ammonium soap, zinc soap, etc.), fatty acid, paraffin, glycerin, petrolatum, etc.

The third type of release agent:
It is a high polymer, including silicone oil, polyethylene glycol, low molecular weight polyethylene, etc. Their release agent efficiency and thermal stability are much better than organic release agents.

Mold release agents are usually divided into powder, semi-solid, and liquid. Powder and semi-solid can be applied to the surface of the mold with a brush or hand-like wax grease. The liquid can be sprayed or brushed on the surface of the mold to form an isolation film. The liquid release agent is preferably sprayed.

Developed countries in the international industry mostly use mold release agents filled with metal spray cans. Due to the good sealing performance of the metal spray can, it can prevent the release agent from being oxidized or mixed with impurities and can ensure the purity of the release agent when it leaves the factory. Large-scale injection molding equipment is installed indoors, with small changes in ambient temperature, and has no effect on the use of spray release agents. However, the temperature of the mold for compression molding must be considered, and a mold release agent with good thermal stability should be selected. Generally, the thermal decomposition temperature of the mold release agent is required to be higher than the mold temperature for molding. Otherwise, charring will occur. For high-end products and secondary processing (such as painting and printing), a release agent suitable for secondary processing should be selected. In order to prevent environmental pollution, a mold release agent that is not easy to burn has a low odor, and toxicity is selected. In the selection of release agents, the economy is an important factor that cannot be ignored. Poor quality release agents will cause cracks and wrinkles on the surface of the product, affect the appearance of the product and the service life of the mold, and cause environmental pollution. Choose a high-quality spray release agent, the price is higher, but the comprehensive economic benefits are high.

In summary:

The key points for the selection of release agent are:

①The mold release is excellent, and the surface tension of the spray mold release agent should be between 17 and 23 N/m.

②It has a heat resistance and will not be carbonized and decomposed when heated.

③Stable chemical performance, no chemical reaction with molded products.

④Do not affect the secondary processing performance of die casting.

⑤It does not corrode the mold, does not pollute the product, and has low odor and toxicity.

⑥Smooth and beautiful appearance;

⑦Easy coating, high production efficiency;

To choose a mold release agent for metal dies casting, you need to choose a suitable mold release agent silicone oil plus an emulsifier. The brand Kaixun alkane aryl silicone oil under Huaian Kaiyue Technology Development Co., Ltd. is very suitable for the production of mold release agents for metal die casting. Friends can go to our product introduction to check. It has excellent properties of high-temperature resistance, no carbonization, no pollution to the mold, and no residue.

烷芳基硅油 铝或铝镁合金高温压铸脱模剂的基油3300

金属压铸脱模剂用改性硅油 烷芳基硅油 KX-V1100 如DC203