What is aluminum alloy die casting?

Aluminum alloy die casting is similar to die casting, except for permanently moulded castings, where the metal is injected under the mold at a high pressure of 10-210 mpa (1,450-30,500)PSI. This results in a more uniform part of generally good surface finish and good dimensional accuracy, with a good casting size of 0.2%. For many parts, machining can be completely eliminated, or may require very light machining to make the size of the dimensions. Die casting, aluminum die casting can be done using a cold chamber or hot chamber process. Zhongshan Die Casting Factory, Zhongshan Lianzhou Hardware Die Casting Factory, Zhongshan die casting, Zhongshan zinc alloy die casting Factory

1.In the cold chamber process, the molten metal is easy to be sent to each rod cold chamber. There is exposure time to reduce the melt to the plunger wall or plunger. It is especially useful for metals such as aluminum, copper (and its alloys), alloys that are easily associated with iron at higher temperatures.

2. The In 1 thermal process is connected to the die cavity pressure chamber to be permanently immersed in molten metal. The air intake of the pressurized cylinder is found to have the plunger moved to the open (non-pressurized) position. This allows the molten metal to be newly charged, filling the cavity so that the cavity can be filled faster than the cold chamber process. Hot chamber processes used for metals such as tin, zinc and lead have low melting points and high fluidity, often alloys with steel are not easy to melt at their temperatures. Die casting, Aluminum die casting, Aluminum castings, Part of ADC-12 die casting, Motorcycle parts, Aluminum pressure die casting

Zinc alloy die casting types

Traditional die casting zinc alloy has 2, 3, 4, 5, 7 alloy, currently the most widely used is No. 3 zinc alloy. In the 1970s, high aluminum-zinc base alloys ZA-8, ZA-12 and ZA-27 were developed.

3: Good mobility and mechanical properties.

It is used in castings with low mechanical strength, such as toys, lamps, decorations and some electrical parts.

5: Good fluidity and good mechanical properties.

It is used in castings with certain requirements for mechanical strength, such as auto parts, electromechanical parts, mechanical parts and electrical components.

2: Used for mechanical parts with special requirements for mechanical properties, high hardness requirements, good wear resistance and general dimensional accuracy requirements.

Die casting mold belongs to a process method of casting liquid die forging and dedicated die casting die forging machine. For die casting, die casting material, die casting machine and die three elements are indispensable. In order to improve production efficiency, brand quality and high economic benefits in the production process, and to extend the life of the die casting mold, the use and maintenance of the die casting mold is very important.

Proper use and maintenance of die casting mold:

1, as far as possible to reduce the rapid cooling and rapid heating of the mold, as far as possible continuous production, in the cold mold state, high-speed injection is strictly prohibited.

In the process of die casting, the die casting mold has always been in a reciprocating fatigue state of heat expansion and cold contraction. The temperature of the mold cavity has been basically changing back and forth between 160 degrees and 350 degrees. The mold is rapidly cooling and heating, and keeps heat expansion and cold contraction, resulting in fatigue damage of the mold. When the production begins in the cold mold state, the mold temperature starts to rise from low temperature, the temperature difference increases, the mold expansion and contraction increases, and the mold fatigue increases correspondingly, which will accelerate the mold damage and shorten the life of the mold. Therefore, continuous production should be done as far as possible in die casting production, so as to reduce the rapid cooling and rapid heating of the mold as far as possible, so as to prolong the life of the mold.

In addition, in the cold mold state, the mold does not reach the temperature of normal production, the gap between the parts of the mold is relatively large, in this case, it is strictly prohibited to open high-speed injection and pressurization. Otherwise, the clearance parts of the mold, including the slider, rod hole and other parts are easy to jump into the aluminum skin, thus damaging the mold and affecting the life of the mold.

2, as far as possible to reduce the injection speed, as far as possible to reduce the specific pressure, reduce the impact of the mold.

During die casting production, the injection speed not only affects the filling speed of die casting and the inner gate speed of injection, but also increases the impact peak value when the injection speed is high. Therefore, high injection speed and fast injection inner gate speed will intensify the scouring of the mold, increase the impact peak, increase the impact force borne by the mold, and greatly reduce the life of the mold. Therefore, when we adjust the die casting process, it is very important to reduce the injection speed as far as possible while ensuring the product quality, which is very important to improve the die life and improve the economic benefits of die casting enterprises. Currently, advanced die casting machines are equipped with injection brakes, which are very beneficial for reducing the peak impact, reducing the impact force borne by the die and increasing the die life.