All about High-pressure Die Casting You Must Know

Basics of Die Casting Process

Pressure die casting is similar to the process of injection molding. The term injection molding generally signifies the production of plastic parts whereas die casting involves production in metals. Die casting mostly suits softer alloys. In the past, you will observe that for die-cast parts, such as toy soldiers tin and lead were quite popular materials. Today, the most common alloys are zinc, aluminum, and magnesium-. It produces high-strength structural automotive and aerospace components and many consumer goods. Each injection is referred to as a shot. A shot is prepared from either more than one casting or part or the scrap material that is produced during the process of casting. To the gates, the parts are attached and are joined together by the runners.

The die is prepared in two halves so that you can remove the shot. One half of the die is fixed and it has a hole into which the molten metal is injected. The other half needs to be closed with the help of a press so that it can resist the pressure of the metal that is being injected. This pressure die casting China is quite considerable, which results in die casting machines being very large and heavy. Molten metal is then made to enter an injection cylinder which is referred to as a shot chamber, and it is then injected by a piston through a nozzle into the die.

Structural Material Properties

Aluminum and magnesium alloys are the two classes of material that are used for structural die-cast parts. In achieving fine-grain structures thin-walled parts and optimized casting processes are used. But porosity that is caused by tiny air bubbles becoming trapped in the molten metal is a major challenge for achieving high-strength cast parts. To squeeze metal into intricate molds there is a need for high pressures, especially if rapid cycle times are required. It can even lead to turbulence that traps air and increases porosity. pressure die casting manufacturer says that it has two negative effects. In the first case, the material is weakened by the voids, especially in terms of fatigue performance, by acting as crack initiation sites. Second, due to the presence of small air bubbles, the heat treatment that is being carried out is prevented, which is very much important for aluminum alloys.