Aluminum Die Casting

Aluminum die-casting includes high-pressure (divided into hot-chamber and cold-chamber) and low-pressure processes. The cold-chamber die-casting is suitable for metal alloys with relatively high melting points such as aluminum, magnesium, and copper. It employs a structure in which separate furnaces are separated from the injection chamber and the molten metal is pushed into the mold cavity by a high-pressure plunger, which can generate relatively high injection pressures and enable the stable formation of complex structural parts. Cold-chamber die-casting, on the other hand, is suitable for metal alloys with higher melting points, such as aluminum, magnesium, and copper. It uses a separate furnace and injection chamber. A high-pressure plunger pushes molten metal into the mold cavity, generating a high injection pressure that enables stable molding of complex structural parts.

We chose cold-chamber high-pressure die-casting for aluminum alloys because:

1. High molding efficiency for high volume production: A single die casting cycle takes only 10-60 seconds and can be combined with a robotic arm for fully automated production. A single machine can produce thousands of parts per day, meeting the high volume demand for aluminum alloy parts in industries such as automotive and home appliances. 

2. High Casting Precision and Good Surface Quality: Aluminum alloy castings achieve dimensional accuracy of IT11-IT13, with tolerances within ±0.1mm and low surface roughness (Ra1.6-6.3μm). These castings can meet precise fit and appearance requirements (e.g., automotive transmission housings and mobile phone midframes) without extensive polishing.

3. Capable of Complex Thin-Walled Parts: High-pressure, high-speed filling allows the aluminum alloy liquid to quickly fill the mold, easily forming thin-walled parts as thin as 0.5mm or structural parts with complex holes and ribs (e.g., laptop stands and engine blocks), reducing part splicing and improving overall strength.

4. High Material Utilization: Scrap from aluminum alloy sprues, flash, and other materials can be directly recycled and remelted, achieving a material utilization rate of 85%-95%. Automated production reduces labor costs, offering significant cost-effectiveness in mass production. 

5. Aluminum alloys offer a wide range of performance adaptability: Die-cast aluminum alloy parts can be enhanced in strength through heat treatments such as T6, achieving both lightweight performance (density of only approximately 2.7g/cm³) and good mechanical properties, meeting the demands for lightweight vehicles and thinner electronic devices.

Aluminum die-castings are widely used in various industries, including automotive, communications, aviation, home appliances, and electronics. With technological advancements and evolving application requirements, the aluminum die-casting industry is continuously evolving towards greater precision, efficiency, and environmental friendliness.