Permanent mold castings is a process that is commonly used to produce aluminum, magnesium and copper products and parts, in difference with the sand casting process, this one employs metal reusable molds.

This process is great for producing big scale production highly precise castings with good surface finishes, when used for aluminum alloy castings the permanent molds, with their proper maintenance, can be very durable and profitable.

via Aluminum Foundry's Blog