Dry Pressing
The specific preparation of the initial body has a significant role to play in any forming process. This means: Parameters and characteristics have to be clearly defined and reproducible. That also of course applies to dry pressing.
Dry pressing is characterized by a very slight residual moisture. It is almost non-existent. Any further drying is not needed. The process is thus eminently suitable for highly dimensioned accurate parts in large quantities. Practically all ceramic materials can be deployed.
A pressing tool for axial dry pressing consists of a press die as well as top and bottom rams. Furthermore, various subdivisions of the die are possible depending on component complexity. A filling shoe is used for filling the press granulate into the mould. With two-sided pressing, a controlled movement of top and bottom rams results in compaction of the granulate. With one-sided pressing only the upper die is in motion. The compact is automatically extracted via pusher, gate and gripper.
Density spread in the stamping given one-sided and two-sided axial pressing
Process sequences with axial dry pressing
