Low Pressure Die Casting Foundry
Low pressure die casting is generally used to produce metal parts that are symmetrical in shape and design, for example, wheel rims and steering knuckles for automobiles may be cast using low pressure casting process. Aluminum is the most commonly chosen alloy.
LPDC is less suitable for very thin-walled parts where the required thickness is less than 3mm. It’s also relatively slower than those components produced in high-pressure processes. Machine size will also limit the size of castings.
What is Low Pressure Casting
In low pressure casting process, the low-pressure air is used to force molten metal from a sealed holding furnace up into a mold cavity, the pressure is applied constantly, sometimes in increasing increments, to fill the mold and hold the metal in place within the die until it solidifies.
Once the cast has solidified, the pressure is released and any residual liquid in the tube or cavity flows back into the holding furnace for recycling. When cooled, the cast is simply removed. it is considered a permanent mold casting process since the molds that make the castings are permanent and can be reused for many cycles.
Low pressure die-casting primarily uses alloys with low melting points and allows for the production of components up to around 150 kg. The advantages are very high strength and the ability to form complex geometries, whilst maximising material usage.