Application of mold release agents in the automotive – aluminum alloy die casting mold release agents

Automobiles are developing in the direction of light weight, high speed, safety and comfort, low cost, low emission and energy saving. Aluminum has the characteristics of low density, light mass, good molding and processing type, reusable recycling, energy saving and environmental protection, etc., plus it can extend the life of the car, which has a significant role in light weight, improving the form performance and safety and comfort performance, reducing fuel consumption, reducing emissions and reducing environmental pollution, in addition, aluminum alloy parts can balance the mass of the front and rear axle, which is gradually gaining people’s attention. Therefore, aluminum and aluminum alloys are recognized as one of the ideal materials for future automobiles.

The amount of aluminum castings in automobiles is increasing year by year, and the scope of application is expanding. Generally speaking, the application of aluminum castings in automobiles can be divided into three areas.

1, Shell parts, such as clutch housing, transmission housing, etc.

2, Engine parts.

3, other non-engine parts.

At present, the types of aluminum castings used in automobiles, different castings, casting processes vary with their use of different places and structural characteristics, can be broadly divided into high-pressure casting (i.e. die-casting), vacuum casting, gravity casting, extrusion casting, etc..

Die-casting can also minimize the wall thickness of the casting to reduce the weight of the casting, reduce the amount of subsequent processing, while die-casting has a better surface quality and dimensional accuracy. Of course, from the investment cost considerations, some domestic small factories to reduce investment risk, there are also metal gravity casting method or low-pressure casting method to produce clutch shell.

Aluminum alloy die-casting process and the application of release agent.

1, spraying the mold release agent diluted on the mold.

2, Closing the mold.

3, Injecting 600 degree aluminum water into the mold and stamping into the mold with a punch.

4, cooling for 10 seconds.

5, Opening the mold.

6, Release the molded part from the mold.

7, Repeat steps 1-5.

The role of die casting mold release agent

1, Die release: provide an effective isolation layer between the metal liquid and the mold to prevent the molten metal from bonding to the mold surface; ensure that the casting is separated from the mold without changing the shape.

2, Lubrication: provide lubrication for the moving parts on the mold.

3, Cooling: control the temperature of the mold.

4, Protection: protect the mold surface from being damaged by molten metal.

5, Insulation: control the flow, solidification and mold filling.

Aluminum die-casting release agent composition: oil, wax emulsion as the main components, usually the emulsion component of the product is 10-40%, the end use of diluted liquid solid content is generally in 0.15% ~ 0.30%. Aluminum die casting when the temperature is very high, more than the general use of silicone release agent temperature. Silicone polymers containing phenyl are more thermally stable than polydimethylsiloxane and more suitable for aluminum alloy die casting mold release.