The pressure die castings process has the main advantage of excellent process repeatability.
The pressure die casting process has the advantage of excellent process repeatability. Generally, the surface finish of pressure die cast parts is achieved from the surface finish of the tool that produces it.
The liquid alloy is forced under high pressure into a steel tool; the alloy solidifies rapidly and takes the form of the tool along with the finish of the tool.
Typically, we can achieve surface finishes of 1.6 microns or better for aluminium and zinc alloy parts and slightly lower for brass alloy parts.
Generally, pressure die cast parts are ejected from the tool with excellent surface finishes. Tool split lines, ejector pin flash, and waste gates are cropped off and parts are fine finished to remove any indications completely.
Pressure die cast parts are usually finished with a fine glass bead or aluminium oxide grit blast, giving a uniform and aesthetically pleasing result that also improves adhesion for the paint process.
Dependent on the application of the product, there are various surface treatments that can be undertaken on aluminium alloy parts: from simple chemical conversion protection or anodising to powder coating to international RAL specs.
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