Permanent mold casting

Permanent mold casting, also known as chill casting, is a production process in which the melt is poured into the cavity of a permanent molding tool, usually made from metal. This molding tool is also called a “chill” and belongs to the class of reusable or permanent molds which survive the casting process intact. Several thousands of cast parts can be produced with a single permanent mold. This lends a high degree of repetitive accuracy to parts produced with this method.

Make An Appointment

How does the permanent mold casting process work?

In permanent mold casting a distinction is made between different casting methods. The simplest form is the gravity process. This process is ideal for alloys with a low smelting point and also, for example, for aluminium. The permanent mold is usually made of two parts, with a negative of the cast part engraved/imprinted on the inside.

The molten alloy is poured into the mold. The hot, liquid metal cools and solidifies where it comes into contact with the inside of the mold. After a short period, the remainder of the molten metal, which has not solidified yet, is poured back out of the mold. As soon as the casting part has fully cooled, it can be released from the mold.

Another method is the low pressure process, in which the melt is not poured into the mold from above but rather pressed into the mold from below through a tube. This method is more complex but also yields particularly dense, non-porous, high-quality casting parts.