Die – casting aluminum process technology

With economic development rapidly , and china manufacturing industry also is  developed in modern society rapidly. Improving industrial level and innovation, it is the trend in die casting industry.

Die casting is a kind of precision casting method which let the metal change to complex metal mold shape by the high pressure. In 1964, the Japanese Association defined die casting as “in the high temperature will be pressed into the molten alloy precision casting , casting in a short time a large number of production of high precision and excellent casting surface”.

The USA called it Die Casting, the UK called it Pressure Die Casting, but in china are familiar with the Japanese saying, known as Die Casting, so the castings are manufactured by the die casting method called die castings, and you know the tensile strength of these materials is almost twice as high as that of ordinary cast alloy. next let’s discuss the application and die casting characteristics of aluminum alloy die-casting products in die casting industry.


The aluminum alloy die-casting products are mainly used in electron, household appliance and communications industry etc. Now it is also applied in many LED lights, as heat sink of the LED flood lights is used integral die-casting aluminum radiator technology.Its advantages is weight lighter, transportation costs lower,an excellent luminous efficiency and a long service life, rather than other heat sink slowly.

However, now the aluminum alloy die casting products are more widely used because of its own unique characteristics, it is used in large aircraft, ship and other relatively high requirements of the industry.

LED aluminum shell die-casting is zinc ingot mold generally, the transmission rate of about 80~90W/M.K (w / M. C), small power many basic 1-3W using this process. The advantages is low cost, fast production,but the heat dissipation is worse.

Aluminum Purity: 98% the following properties of aluminum, hard and brittle, only foundry casting products. Therefore, most of the aluminum alloy die castings, including LED lamps die casting shell is the use of aluminum, because the production of aluminum is only suitable for the production of die castings, and high hardness, low cost. In addition, the die casting LED lamp shell has an advantage in mass production, because the production of die casting speed is very fast, the production cost is low.

The aluminum alloy die casting is high performance on strength and hardness commonly, because its surface is special treatment, such as electroplating, electrophoretic paint, spray, sand blasting, anodizing, paint, high temperature paint, rust and passivation etc. Different surface treatment process, the product of the requirements are not the same as the tolerance.

In general speaking, the aluminum alloy die casting main resistance testing includes neutral salt spray, RCA tape abrasion test, abrasion test, pencil hardness test, 100 lattice test etc.


Now more and more design use luminum alloy die casting,due to the good heat dissipation, low transportation costs, metal utilization, the structure advantages.

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