Pressure die casting can deliver high volumes of metal components made from magnesium, zinc, or aluminum. The process to die casting parts may vary per manufacturer, so it’s imperative to work with the appropriate factory that understands your requirements. That way, you can be sure that you are investing in reliable precision die casting services with finishing options and post-process machining.
What do you need to know ?
Die casting is similar to injection molding, except that it is intended for metals. Read further for a step-by-step guide to the process:
Mold manufacturing and preparation
A mound tool is manufactured by the service provider’s skilled engineers and toolmakers before installing it on a die casting press. A lubricant is typically applied to the mold’s interior walls to regulate the temperature and create a film between the mound and the molten material, and hence the casting can be easily removed.
The Molten material is injected under pressure into the cavity. When die casting parts, the mound has to be fully sealed and closed to completely accept the highly pressurized molten material. The pressure is usually between 1,500 and 25,000 pounds per square inch, depending on the application. The mound maintains the pressure until the metal cools and solidifies.
Next, the newly made cavity is ejected from the mound once it solidifies. The mound should come with ejector pins to easily release the cavity when engaged.
At this stage of die casting parts, any scrap metal is separated from the new cavity. Excess scrap metal has to be removed before reusing the mound. The parts can be finished in different ways, including anodizing and powder coating.
Why use die casting ?
Die casting parts delivers a lower cost per part and the process is highly accurate and repeatable. It is practical for complex and large parts, too. With the right manufacturer, you can use die casting for low to mid-volume metal part production.