A:Pressure casting is a casting method in which a molten alloy liquid is poured into a pressure chamber, a cavity of a steel mold is filled at a high speed, and the alloy liquid is solidified under pressure to form a casting. The main features of die casting that distinguish it from other casting methods are high pressure and high speed.

Die casting machines, die-casting alloys and die-casting molds are the three major elements of die-casting production and are indispensable. The so-called die-casting process is the organic combination of these three elements, enabling the stable, rhythmic and efficient production of castings with the appearance, good internal quality, and the size of the drawings or the requirements of the agreement.

A:

(1) It can meet the performance requirements of die castings.

(2) The melting point is low, the crystallization temperature range is small, the fluidity at the temperature above the melting point is good, and the amount of shrinkage after solidification is small.

(3) It has sufficient strength and plasticity at high temperatures, and has low hot brittleness.

(4) Good physical and chemical properties such as wear resistance, electrical conductivity, thermal conductivity, and corrosion resistance.

A: Generally, the actual application in the die-casting industry is not 100% pure aluminum, but with an aluminum content ranging from 95% to 98.5% (die-cast aluminum alloy with good anodizing performance), and pure aluminum needs to contain more than 99.5% aluminum ( Such as pure aluminum rotor die casting). Due to its good thermal conductivity and anodizing properties, alumina is often used in heat sinks and surface treatments where color requirements are high.

Compared with conventional aluminum alloy die-casting (such as ADC12), due to the high silicon content, the shrinkage rate is relatively small 4-5%; but the alumina is basically no silicon, the shrinkage rate is 5-6%, so the conventional aluminum alloy die-casting does not have anodizing effect.

A: Die-casting machines can be divided into two types, hot chamber die casting machines and cold chamber die casting machines. The difference lies in how much force they can withstand. Typical pressure ranges from 400 to 4,000 tons. Hot chamber die casting is a molten, liquid, semi-liquid metal in a metal pool that fills the mold under pressure. Cold die casting can be used for die casting metals that cannot be used in hot chamber die casting processes, including aluminum, magnesium, copper, and zinc alloys with higher aluminum content. In this process, the metal needs to be melted first in a separate crucible. A certain amount of molten metal is then transferred to an unheated injection chamber or nozzle; the difference between the hot chamber and the cold chamber is whether the injection system of the die casting machine is immersed in the metal solution.

A: Hot chamber die casting machine: zinc alloy, magnesium alloy, etc.

Cold chamber die casting machine: zinc alloy, magnesium alloy, aluminum alloy, copper alloy, etc.

Vertical die casting machine: zinc, aluminum, copper, lead, tin;

A:

1. Good casting performance

2. Low density (2.5 ~ 2.9 g / cm 3), high strength.

3. Metal liquid with high pressure and fast flow rate during die casting

4, the product quality is good, the size is stable, and the interchangeability is good;

5, high production efficiency, the number of times the die-casting mold is used;

6, suitable for a large number of large-scale production, good economic returns.

A: Commonly used in the surface treatment of aluminum alloy die-casting parts are: electrophoretic paint, electroplating, fuel injection, sand blasting, shot blasting, anodizing, baking varnish, high temperature baking varnish, anti-rust passivation and so on.