Due to the basic characteristics of the material, good corrosion resistance, lightweight, etc., aluminum alloys are widely used in aviation, automotive, medical, communications, etc. With the development of time, the demand for aluminum alloy products is increasing. So far, there are There are two casting methods, namely pressure casting and gravity casting. Our products will distinguish which one is suitable according to the process characteristics. Let’s talk about the characteristics of these two methods.

In aluminum alloy die-casting, pressure casting is divided into high-pressure casting and low-pressure casting, which refers to casting aluminum or aluminum alloy equipment and devices. Generally, aluminum or aluminum alloy heated to liquid state is poured into the mold cavity through a sand mold or metal mold to obtain Aluminum parts or aluminum alloy parts of many shapes and sizes are often called aluminum alloy die castings.

The characteristics of aluminum alloy die castings are:

1. The product has good smoothness and can generally reach

2.Cannot be heat treated

3. The product has high air tightness, high casting strength and surface hardness, but low elongation

4. High production efficiency

5. Mold cost is high and life is short

6. Can produce thin-walled parts with small machining allowance

Aluminum alloy gravity casting is most commonly used in metal mold casting. Heat-resistant alloy steel is used to make the mold. The strength, size and appearance of the cast aluminum castings are pretty good. Generally, the aluminum liquid is directly sent to the die-casting machine manually for natural cooling. Therefore, Its grain structure is relatively fine and its mechanical properties are relatively good.

Characteristics of gravity cast products are:

1. The finish of the product is not high and pits are easily exposed after shot blasting.

2. There are few internal pores, suitable for heat treatment

3. Low density, slightly poor strength, but high elongation

4. Low mold cost, long life, low productivity, increased production costs

5. The process is simple and not suitable for producing thin-walled parts. We can choose according to the characteristics of the product.

There are obvious differences between gravity casting and die casting in terms of process principles, production efficiency, casting range and cost. The specific casting process must be selected according to customer requirements.