Advantages of die-casting process

High pressure and high-speed filling die casting are two major characteristics of die casting. Its commonly used injection pressure ratio ranges from thousands to tens of thousands of kPa, and even up to 2 × 105kPa。 The filling speed is about 10-50m/s, and sometimes it can even reach over 100m/s. 

The filling time is very short, usually within the range of 0.01 to 0.2 seconds. Compared with other casting methods, die-casting has the following three advantages:

advantage:

1. Good product quality

The dimensional accuracy of castings is high, generally equivalent to levels 6-7, and even up to level 4; Good surface finish, generally equivalent to 5-8 grades; The strength and hardness are relatively high, and the strength is generally increased by 25-30% compared to sand casting, but the elongation is reduced by about 70%; Stable size and good interchangeability; Can be used for die-casting thin-walled and complex castings. For example, the current minimum wall thickness of zinc alloy die castings can reach 0.3mm; Aluminum alloy castings can reach 0.5mm; The minimum casting aperture is 0.7mm; The minimum pitch is 0.75mm.

2. High production efficiency

High machine productivity, such as the domestic J-III3 horizontal cold air die-casting machine, which can cast 600-700 times per eight hours on average, and the small hot chamber die-casting machine, which can cast 3000-7000 times per eight hours on average; Die-casting molds have a long lifespan, with a pair of die-casting molds and die-casting bell alloys having a lifespan of several hundred thousand times, or even millions of times; Easy to achieve mechanization and automation.

3. Excellent economic results

Due to the advantages of precise size and smooth surface of die-casting parts. Generally, it is used directly without mechanical processing, or the processing volume is small, which not only improves the metal utilization rate but also reduces a large number of processing equipment and working hours;

 The cost of castings is easy; Combination die casting can be used with other metal or non-metallic materials. It saves both assembly time and metal.