Claims
- 1. A method for pressing ceramic powder within a mold cavity to form ceramic tiles, which comprises:subjecting the powder to a compacting pressure; and subjecting the powder to close together pressure pulses while maintaining the compacting pressure, the pressure pulses having the same pressure value over a whole surface of the mold cavity, the pressure pulses being transmitted to the powder through a flexible membrane in contact with the powder and directly resting on a layer of pressurized hydraulic incompressible liquid.
- 2. The method according to claim 1, wherein the pressure pulses are generated in said hydraulic incompressible liquid.
- 3. The method according to claim 1, wherein there are a discrete number of pressure pulses.
- 4. The method according to claim 1, wherein the pressure pulses have a maximum value equal to the powder compacting pressure, and a minimum value greater than zero.
- 5. The method according to claim 1, wherein there are between about 10 and 50 pressure pulses.
- 6. The method according to claim 1, wherein the hydraulic incompressible liquid is an oil.
- 7. The method according to claim 1, wherein the pressure pulses can have variable pulse frequency, number, intensity or pressure waveform.
Priority Claims (1)
Number |
Date |
Country |
Kind |
RE97A0057 |
Aug 1997 |
IT |
|
Parent Case Info
This application is a divisional of application Ser. No. 09/124,036, filed on Jul. 29, 1998, U.S. Pat. No. 6,305,925 the entire contents of which are hereby incorporated by reference and for which priority is claimed under 35 U.S.C. §120; and this application claims priority of Application No. RE97A000057 filed in Italy on Aug. 1, 1997 under 35 U.S.C. §119.
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Non-Patent Literature Citations (3)
Entry |
The American Heritage Dictionary, Fourth Edition, Copyright (c) 2000 by Houghton Mifflin Company. Accessed using http://www.dictionary.com, search term “discrete”.* |
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