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1. WO2002024997 - COLD ISOPRESSING METHOD

Publication Number WO/2002/024997
Publication Date 28.03.2002
International Application No. PCT/US2001/028540
International Filing Date 14.09.2001
Chapter 2 Demand Filed 09.04.2002
IPC
B29C 43/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
43Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
B29C 43/10 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
43Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
02of articles of definite length, i.e. discrete articles
10Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
B29C 43/14 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
43Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
02of articles of definite length, i.e. discrete articles
14in several steps
B29C 43/16 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
43Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
02of articles of definite length, i.e. discrete articles
16Forging
B30B 11/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
30PRESSES
BPRESSES IN GENERAL; PRESSES NOT OTHERWISE PROVIDED FOR
11Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses or tabletting presses
CPC
B01D 2323/10
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2323Details relating to membrane preparation
10Specific pressure applied
B01D 2323/18
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2323Details relating to membrane preparation
18Use of pore-control agents
B01D 2325/022
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
2325Details relating to properties of membranes
02Details relating to pores or pososity of the membranes
022Asymmetric membranes
B01D 67/0041
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
67Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
0039Inorganic membrane formation
0041by agglomeration of particles in the dry state, e.g. sintering
B01D 67/0046
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
67Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
0039Inorganic membrane formation
0046by slurry techniques, e.g. die or slip-casting
B01D 69/12
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
69Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
12Composite membranes; Ultra-thin membranes
Applicants
  • PRAXAIR TECHNOLOGY, INC. [US]/[US]
Inventors
  • APTE, Prasad, S.
  • CALLAHAN, Shawn, W.
Agents
  • ROSENBLUM, David, M.
Priority Data
09/668,32922.09.2000US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) COLD ISOPRESSING METHOD
(FR) PROCEDE DE PRESSAGE ISOSTATIQUE A FROID
Abstract
(EN)
A cold isopressing method in which first and second layers of at least two layers (16, 22; 38, 40; 38, 46; 38, 52) are formed within an isopressing mold (1, 2) and the second of the layers (22; 40; 46; 52) is isostatically pressed against the first of the layers (16; 38; 46) to compact the second layer (22; 40; 46; 52). The layers (16; 22; 38, 40) can be formed from different materials, for instance granular materials or slurries. Each layer (52) can additionally have different levels of materials (54, 56, 58). The granular materials can have pore formers to produce intermediate porous layers. Channels forming materials (50) can be positioned between layers (38, 46) during isopressing. Alternatively, the first layers (16; 38) can be performed by extrusion, slip casting or injection isopressing molding.
(FR)
L'invention concerne un procédé de pressage isostatique à froid permettant le formage d'au moins deux couches (16, 22; 38, 40; 38, 46; 38, 52) dans un moule de pressage isostatique (1, 2) et le pressage isostatique de la seconde couche (22; 40; 46; 52) contre la première des couches (16; 38; 46) pour rendre compacte la seconde couche (22; 40; 46; 52). Les couches (16; 22; 38, 40) peuvent être formées à partir de différentes matériaux, comme des matériaux granulaires ou des suspensions épaisses. Chaque couche (52) peut également comprendre différents niveaux de matériaux (54, 56, 58). Les matériaux granulaires peuvent comprendre des éléments porogènes destinés à former des couches intermédiaires poreuses. Des matériaux permettant de former des canaux (50) peuvent être placés entre les couches (38, 46) lors du pressage isostatique. Dans un autre mode de réalisation, les premières couches (16; 38) peuvent être préformées par moulage par pressage isostatique par extrusion, par coulage ou par injection.
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