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Cold Pressing


Not just the idea of businessmen, but also partly a human dream. A piece of raw material is placed in a machine and after a short time it comes out ready for installation. In addition, the fact that it is very hard and precisely manufactured, vouches for a long lifespan. The whole procedure can be meticulously planned and ideally integrated into the production process. Cold pressing brings us a good bit closer to this dream.

How it works

Having learned from the sheet metal forming industry, the "deep-drawing" method is increasingly being applied in the production of massive components. Pressings, sometimes as large as a house, apply, through the application of certain mechanics, enormous forces. This works with the support of multi-bearing shafts and large dimensioned gears. The holding-down clamp used in metal pressing has now evolved into a locking device. This now works both from above and from below. Ideally, the target is a consistent increasing (and ebbing) of both the clamping, and of the pressing force. The hydraulics are required to produce the very high and consistent pressure necessary from above and from below. 1000 bar pressure is about the limit for hosing connections between the two locking cylinders.

If the form is evenly closed, the material has no other choice but to adapt itself, in the inside contour, to the spike, and in the outside contour, to the drawing die. If e.g., the spike has mouldings for gear-teeth, the material flows due to the enormous power into the hollow cavities where it produces a gearing so precise that further processing is almost unnecessary. Not exactly with complex parts, but with more simple contouring, up to 100 tact cycles per minute are possible. 06/08