Patent EP0259091B1 successfully refreshed from Google Patents.
EP0259091B1
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Improved method for moulding fibre reinforced laminates
Assignee: Advanced Composite Components Ltd
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Filing: 1987-08-26
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Granted: 1991-05-08
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Expires: 2007-08-26
Abstract
Abstract A method of moulding a fibre reinforced resinous material comprising providing fibrous reinforcement in an initially uncured resin matrix, initiating a cycle which will result in the curing of the matrix and which includes an initial cure phase and a post cure phase, and selecting any one or more of the resin system, cure phases or initial cure temperature so that the sum of the fractional thickness change during the initial cure phase and the fractional thickness change during the post cure phase being equal to or differing by a predetermined amount from the fractional dimensional change in the plane of the fibre reinforcement at the desired end-use temperature at which greatest dimensional accuracy is required.
Inventors
- 👤 Roger Mark Composite House Sloman
- 👤 Christopher Composite House Ridgard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 13:25
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/0288; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/24; B29K2105/243
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
118 words
A method of moulding a fibre reinforced resinous material comprising providing fibrous reinforcement in an initially uncured resin matrix, initiating a cycle which will result in the curing of the matrix and which includes an initial cure phase and a post cure phase, characterized in that for a given resin system and cure phases an initial cure temperature is selected which results in the sum of the fractional thickness change during the intitial cure phase and the fractional thickness change during the post cure phase being equal to or differing by a predetermined amount from the fractional dimensional change in the plane of the fibre reinforcement at the desired end-use temperature at which greatest dimensional accuracy is required.
Claim 2
Independent Claim
118 words
A method of moulding a fibre reinforced resinous material comprising providing fibrous reinforcement in an initially uncured resin matrix, initiating a cycle which will result in the curing of the matrix and which includes an initial cure phase and a post cure phase, characterized in that for a given initial cure temperature and cure phases a resin system is selected which results in the sum of the fractional thickness change during the initial cure phase and the fractional thickness change during the post cure phase being equal to or differing by a predetermined amount from the fractional dimensional change in the plane of the fibre reinforcement at the desired end-use temperature at which greatest dimensional accuracy is required.
Claim 3
Independent Claim
120 words
A method of moulding a fibre reinforced resinous material comprising providing fibrous reinforcement in an initially uncured resin matrix, initiating a cycle which will result in the curing of the matrix and which includes an initial cure phase and a post cure phase, characterized in that for a given initial cure temperature and resin system cure and post cure phases are selected which result in the sum of the fractional thickness change during the initial cure phase and the fractional thickness change during the post cure phase being equal to or differing by a predetermined amount from the fractional dimensional change in the plane of the fibre reinforcement at the desired end-use temperature at which greatest dimensional accuracy is required.
Claim 4
Independent Claim
75 words
A method as claimed in any of claims 1 to 3, characterised in that where a multi-layer, multi-orientation, unidirectional fibre reinforcement is employed a curing process is selected which will produce a fractional thickness change which equals the dimensional change in the plane of the reinforcement in one particular direction of fibre orientation, or which matches the mean value of the in-plane dimensional change or differs for either of the former by a predetermined amount.
Claim 5
Independent Claim
38 words
A method as claimed in any one of the preceding claims, characterised in that the initial cure temperature is selected such that it is as close to ambient as possible while still producing a satisfactory initial cure phase.
Claim 6
Independent Claim
30 words
A method as claimed in any one of claims 1 to 5, characterised in that ingredients additional to the basic fibre/resin combination are incorporated to modify the thickness change behaviour.
Claim 7
Dependent Claim
21 words
A method as claimed in claim 6, characterised in that an additional reinforcement is arranged substantially transversely of the main reinforcement.
Claim 8
Independent Claim
119 words
A method of moulding a fibre reinforced resinous material comprising providing fibrous reinforcement in an initially uncured resin matrix, initiating a cycle which will result in the curing of the matrix and which includes an initial cure phase and a post cure phase, characterised in that any one or more of initial cure temperature, resin system, and cure phases are selected to cause the sum of the fractional thickness change during the initial cure phase and the fractional thickness change during the post cure phase to be equal to or differ by a predetermined amount from the fractional dimensional change in the plane of the fibre reinforcement at the desired end-use temperature at which greatest dimensional accuracy is required.
Claim 9
Independent Claim
132 words
A method as claimed in any of one the preceding claims, characterised in that the resinous material is moulded on a mould which corresponds exactly to the shape of the article being moulded at the desired end-use temperature whereby the moulded article as said desired temperature on removal from the mould conforms exactly to said mould shape when the sum of the fractional thickness change during cure equals the fractional dimensional change in the plane of the fibre reinforcement or is distorted from said mould shape or conforms to the mould shape and includes residual stresses or a combination of distortion and residual stresses on removal from the mould when the sum of the fraction thickness changes during cure differs from the fractional dimensional change in the plane of the fibre reinforcement.
Claim 10
Independent Claim
95 words
A method as claimed in any one of claims 1 to 8, characterised in that the resinous material is moulded on a mould whose shape differs from the shape of the final shape of the article to be moulded at the desired end-use temperature by a predetermined amount whereby the moulded article on removal from the mould conforms exactly to the desired shape when the sum of the fractional thickness changes during cure differs from the fractional dimensional change in the plane of the fibre reinforcement by a predetermined amount chosen to achieve this condition.
References Cited (Backward Citations)
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