Process Uniaxial pressing
This shaping method is inexpensive and suitable for high-volume production of simple shapes (limited geometrical possibilities) such as refractories, tiles, electronic ceramics, etc. The uniformity of compaction is not very high.

Uniaxial pressing involves the compaction of powder into a rigid die by applying pressure in a single axial direction through a rigid punch or piston. The presses are usually mechanical or hydraulic and the pressing cycle repeats 6 to 100 times/min.

There are two kinds of uniaxial pressing. Dry pressing: for spray-dried powders containing 0-4% moisture; easy to automate; tight tolerances.
Wet pressing: for 10-15% moisture, clay-containing powders; not well-suited for automation; larger tolerances.
Category Mass conserving processes, Powder technology
Materials Ceramics
Metal powders
Cermet
Typical products Ceramic tile
Harrow pin
Sealing disc
Self-lubricating bearings
Toothed wheel
Competing processes CIP (cold isostatic pressing)
Investment casting
Forging
References Dansk Sintermetal A/S
FJ Sintermetal
Price notes Cycle times are 6-100 pieces a minute.

Setup times are relatively low (a few hours).

Tooling cost is 10,000 - 100,000 DKK.
Environmen- tal notes Creation: There is almost no waste of material.
Photo Thomas Nissen (Compuer graphics)
Copyright © 1996-2004 Torben Lenau
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