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1. WO1990013413 - CONTROLLED CASTING OF SHRINKABLE MATERIAL

Publication Number WO/1990/013413
Publication Date 15.11.1990
International Application No. PCT/US1990/002000
International Filing Date 13.04.1990
Chapter 2 Demand Filed 03.12.1990
IPC
B29C 35/08 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
35Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
02Heating or curing, e.g. crosslinking or vulcanising
08by wave energy or particle radiation
B29C 37/00 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
37Component parts, details, accessories or auxiliary operations, not covered by group B29C33/ or B29C35/144
B29C 39/40 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
39Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
22Component parts, details or accessories; Auxiliary operations
40Compensating volume change, e.g. retraction
B29D 11/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
11Producing optical elements, e.g. lenses or prisms
C08F 283/00 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
283Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G117
C08F 283/01 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
283Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G117
01on to unsaturated polyesters
CPC
B29C 2035/0827
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
35Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
02Heating or curing, e.g. crosslinking or vulcanizing ; during moulding, e.g. in a mould
08by wave energy or particle radiation
0805using electromagnetic radiation
0827using UV radiation
B29C 35/0894
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
35Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
02Heating or curing, e.g. crosslinking or vulcanizing ; during moulding, e.g. in a mould
08by wave energy or particle radiation
0888using transparant moulds
0894provided with masks or diaphragms
B29C 37/005
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
37Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
005Compensating volume or shape change during moulding, in general
B29C 39/40
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
39Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
22Component parts, details or accessories; Auxiliary operations
40Compensating volume change, e.g. retraction
B29D 11/00163
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
11Producing optical elements, e.g. lenses or prisms
00009Production of simple or compound lenses
00038Production of contact lenses
00125Auxiliary operations, e.g. removing oxygen from the mould, conveying moulds from a storage to the production line in an inert atmosphere
00134Curing of the contact lens material
00153Differential curing, e.g. by differential radiation
00163Movable masks or shutters, e.g. to vary the exposure
B29D 11/00413
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
11Producing optical elements, e.g. lenses or prisms
00009Production of simple or compound lenses
00413made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges
Applicants
  • POLYMER SYSTEMS, INC. [US]/[US]
Inventors
  • SOANE, David, S.
Agents
  • SIEBERT, J., Suzanne
Priority Data
345,71801.05.1989US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) CONTROLLED CASTING OF SHRINKABLE MATERIAL
(FR) MOULAGE CONTROLE D'UN MATERIAU RETRACTABLE
Abstract
(EN)
A method and a device are disclosed which show how a shrinkable material such as a prepolymer material can be formed $i(in situ) without defects and with no internal stresses. The method and the device cover both $i(in situ) polymerization and devolatilization or coagulation of a liquefied polymer in a solvent. The method and the device use a differential exposure of the prepolymer material to the solidifier.
(FR)
Sont présentés une méthode et un appareil qui montrent de quelle manière un matériau rétractable comme un matériau prépolymère peut être moulé $i(in situ) sans défauts et sans contraintes internes. La méthode et l'appareil couvrent à la fois la polymérisation $i(in situ) et la dévolatilisation ou la coagulation d'un polymère liquéfié dans un solvant. La méthode et l'appareil emploient une exposition différentielle du matériau prépolymère au solidifiant.
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