Cold forming, also known as cold extrusion, belongs to the family of non-cutting reshaping processes. It is a type of mass forming which involves a one- or two-stage production process to produce hollow as well as solid objects. The material is basically made to flow using high pressure. A stamp presses the blank into a tool-opening which gives it its shape – the dye.

This production process can be used to manufacture things like screws with a thread diameter of 48 mm.

It achieves high levels of dimensional accuracy and surface quality. However, materials can only stand up to certain reshaping conditions. If extensive reforming is required, or if a material only permits limited changes in shape, then hot forming or a cutting process must be used, either before or afterwards. It is nevertheless possible to produce highly complex parts using cold extrusion.

The first advantage of this process over cutting processes (turning, milling etc.) is that it consumes much less material, the second is the output rate, which, depending on the part, can be as high as 1,000 items per minute. Tool and equipping costs, however, can be relatively high by comparison.

Our engineers will gladly advise you on the design of your parts and the best choice of production process.