The advantages and disadvantages of die casting process

Talking about the advantages and disadvantages of die casting process:

advantage:

(1) Metal parts with complex shapes, clear outlines, thin walls and deep cavities can be manufactured. Because molten metal maintains high fluidity under high pressure and high speed, metal parts that are difficult to process by other processes can be obtained.

(2) The dimensional accuracy of die castings is high, up to IT11-13 grade, sometimes up to IT9 grade, the surface roughness reaches Ra0.8-3.2um, and the interchangeability is good.

(3) The material utilization rate is high. Due to the high precision of die castings, they can be assembled and used only after a small amount of machining, and some die castings can be assembled and used directly. Its material utilization rate is about 60%-80%, and the blank utilization rate reaches 90%.

(4) High production efficiency. Due to the high-speed filling, the filling time is short, the metal industry solidifies quickly, and the die-casting operation cycle is fast. Among various casting processes, the die casting method has the highest productivity and is suitable for mass production.

(5) Convenient use of inserts. It is easy to set the positioning mechanism on the die-casting mold, which is convenient for inlay casting and meets the local special performance requirements of the die-casting parts

shortcoming:

1. Due to high-speed filling and rapid cooling, the gas in the cavity is too late to be discharged, resulting in the presence of pores and oxidized inclusions in the die-casting parts, thereby reducing the quality of the die-casting parts. Due to the expansion of gas in the pores at high temperature, the surface of the die-casting will bubble. Therefore, the die-casting with pores cannot be heat treated.

2. Die-casting machines and die-casting molds are expensive and not suitable for small batch production.

3. The size of die castings is limited. Due to the limitation of the clamping force of the die-casting machine and the size of the mold, it is impossible to die-cast large die-casting parts.

4. The types of die-casting alloys are limited. Because die-casting molds are limited by the operating temperature, they are currently mainly used for die-casting zinc alloys, aluminum alloys, magnesium alloys and copper alloys.