US 6,165,398 A · Method of slip casting powdery material, using a water resistant mold with self-water absorbent ability

Abstract

A method of slip casting using a casting mold provided with a water-absorbent layer that has a self-water-absorbent ability, substantially has a water resistance, and is controlled in the saturated water content thereof, the slip casting being conducted by employing mainly a capillary sucking force as the driving force of the water-absorbent layer of cast formation. An open-cell porous body usable as the water-absorbent layer is produced by agitating a mixture comprising a compound having at least one epoxy ring in its molecule, a curing agent which cures the epoxy compound by reaction, a filler developing for a self-water-absorbent ability and a mold release property, and water to prepare an O/W emulsion slurry and curing the slurry, as such in a hydrous state.

Claims25

Dependent claims

A method of slip casting a powdery material with a slip casting mold having a self water absorption capability and a water absorption layer which is substantially water resistant, comprising the steps of:

I) controlling a water saturation percentage of the water absorption layer;
II) pouring a slurry into the slip casting mold;
III) depositing the slurry on the water absorption layer under a slip casting pressure which comprises a pressure selected from at least one of a) a slurry head pressure, b) a suction vacuum applied to the water absorption layer, and c) a pressure of at most 0.3 MPa applied directly to the slurry;
and
IV) releasing a deposited molded body from the slip casting mold.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/032,284Filed 26 Feb 1998

Priority

JP 7-25441826 Aug 1995

Granted

26 Dec 2000

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

B28B 1/26
Producing shaped prefabricated articles from the material: by slip-casting, i.e. by casting a suspension or dispersion of the material in a…
B22F 3/22
Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted…:…
B28B 1/263
Mould materials; Manufacture of moulds or parts thereof: plastics
B28B 1/265
By slip-casting, i.e. by casting a suspension or dispersion of the material in a liquid-absorbent or porous mould, the liquid being allowed to…:…

Method of slip casting powdery material, using a water resistant mold with self-water absorbent ability

Life of this patent

Method of slip casting powdery material, using a water resistant mold with self-water absorbent ability

Life of this patent

Abstract

Claims25