GB2265854A - Fibre reinforced plastic composites - Google Patents

Fibre reinforced plastic composites Download PDF

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Publication number
GB2265854A
GB2265854A GB9304281A GB9304281A GB2265854A GB 2265854 A GB2265854 A GB 2265854A GB 9304281 A GB9304281 A GB 9304281A GB 9304281 A GB9304281 A GB 9304281A GB 2265854 A GB2265854 A GB 2265854A
Authority
GB
United Kingdom
Prior art keywords
composite
curing
stage curing
effected
stage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9304281A
Other versions
GB9304281D0 (en
Inventor
Alan John Paul Cooper
James Mcintosh Methven
Seyed Reza Ghaffariyan Anbaran
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHAW JOHN Ltd
Original Assignee
SHAW JOHN Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHAW JOHN Ltd filed Critical SHAW JOHN Ltd
Publication of GB9304281D0 publication Critical patent/GB9304281D0/en
Publication of GB2265854A publication Critical patent/GB2265854A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/543—Fixing the position or configuration of fibrous reinforcements before or during moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • B29C2035/046—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames dried air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/001—Shaping in several steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

A method of manufacturing a composite profile incorporating a thermosetting resin comprises curing the composite in elongate form over selected zones as first stage curing, leaving at least one selected uncured zone; bending or otherwise manipulating the composite within the uncured zone; and subsequently effecting a second stage curing to cure the previously uncured zone(s), whereby the composite remains set in its bent etc. form. The invention also includes fibre reinforced plastics composites manufactured by the above defined method. Curing can be carried out using a hot-air blower, an infra-red source, an oven, compression moulding, microwave heating, and ultra-violet light or a "room-temperature" catalyst. Microwaves may be applied to the composite before or during its passage through a shaping disc.

Description

FIBRE REINFORCED PLASTIC COMPOSITES This invention relates to the manufacture of fibre reinforced plastic composites.
In our GB Patent Application No. 9112318.2 (2245893) is described a method of manufacturing fibre reinforced, plastics composites, in which the matrix and fibre reinforcement components which form the precursor are combined in a die where the matrix and the fibre content is controlled to the desired ratio, and microwave energy is applied to the resultant precursor emerging from the die as a heating means to obtain total, partial, or completion of crosslinking of the thermosetting resin matrix of such composites. Also described is apparatus for carrying out this method comprising a die through which the matrix/fibre precursor is drawn, and downstream of the die exit a microwave energy unit is provided to heat the precursor to obtain total, partial or completion of crosslinking of the resin matrix.
However, it has in the past only been possible to produce elongate composites, whereas on occasion, composites of non-elongate form, or part elongate form, are required.
According to a first aspect of the present invention there is provided a method of manufacturing a composite profile incorporating a thermosetting resin, comprising curing the composite in elongate form over selected zones as first stage curing, leaving at least one selected uncured zone; bending or otherwise manipulating the composite within the uncured zone; and subsequently effecting a second stage curing to cure the previously uncured zone(s), whereby the composite remains set in its bent etc. form.
Thus, if the composite is to constitute a reinforcing bar for instance, then it may readily be provided with a hooked end for instance, by the above method, i.e. a "hinge" zone adjacent the intended hooked end is left uncured in the first stage curing, the end portion is then bent at the hinge zone, and the hinge zone is then cured in the second stage curing.
By providing a plurality of uncured zones or lengths, at spaced-apart intervals along an elongate composite, the latter may be folded, festooned, twisted or otherwise manipulated into a space-filling shape, and this shape fixed permanently by subsequently curing the hinge(s) in the second curing stage. First and/or second stage curing, i.e. crosslinking, may be effected by local heating from a hot air gun or infra-red source, by compression moulding - optionally into some shape which is different from that of the main profile of the composite, or the entire structure of composite can be put into an oven.
In detail, the extent of curing of the composite may be directly controlled by the application of an electromagnetic field in the frequency range 1 MHz to 300 GHz, preferably 50 MHz to 3 GHz.
The composite may be overwound in a helical fashion with one or more continuous fibres before and/or after entering the apparatus at an overwinding station. The overwinding fibre may be heat shrinkable as disclosed in EP 0000734B.
Finally, the composite may include an ultra-violet sensitiser or a "room temperature" catalyst, at least at the intended hinge zones, so that these zones can be cured with (a) ultra-violet light and (b) time.
According to a second aspect of the apparatus, there is provided a fibre reinforced plastics composite manufactured by the method of the first aspect.
According to a third aspect of the invention, apparatus for carrying out the method of the first aspect may comprise a cylindrical, rectangular or other form of microwave cavity, or waveguide, which is designed in such a way that the composite passes through the apparatus and the electric field is absorbed substantially by the profile.
The apparatus may incorporate a shaping die through which the composite passes as it absorbs the electromagnetic energy. The composite may pass through a shaping die prior to entering the curing means.

Claims (16)

1. A method of manufacturing a composite profile incorporating a thermosetting resin, comprising curing the composite in elongate form over selected zones as first stage curing, leaving at least one selected uncured zone; bending or otherwise manipulating the composite within the uncured zone; and subsequently effecting a second stage curing to cure the previously uncured zone(s), whereby the composite remains set in its bent etc. form.
2. A method as claimed in Claim 1, wherein a plurality of uncured zones or lengths are provided at spacedapart intervals along an elongate composite.
3 A method as claimed in Claim 1 or Claim 2, wherein first and/or second stage curing, i.e. cross-linking, is effected by local heating from a hot air gun or infra-red source.
4. A method as claimed in Claim 1 or Claim 2, wherein first and/or second stage curing, i.e. cross-linking, is effected by compression moulding - optionally into some shape which is different from that of the main profile of the composite.
5. A method as claimed in Claim 1 or Claim 2, wherein first and/or second stage curing, i.e. cross-linking, is effected by putting the entire structure of composite into an oven.
6. A method as claimed in any preceding Claim, wherein, with an infra-red source used for first and/or second stage curing, the extent of curing is directly controlled by the application of an electromagnetic field in the frequency range 1 MHz to 300 GHz, preferably 50 MHz to 3 GHz.
7. A method as claimed in any preceding Claim, overwound in a helical fashion with one or more continuous fibres.
8. A method as claimed in Claim 7, wherein the overwinding is effected with a heat shrinkable fibre.
9. A method as claimed in any preceding Claim, wherein the composite includes an ultra-violet sensitiser, with first and/or second stage curing effected by ultra-violet light.
10. A method as claimed in any one of Claims 1 to 8, wherein the composite includes a so-called 'ssroom-temperature" catalyst, with first and/or second stage curing effected by time.
11. A method of manufacturing a composite profile as claimed in Claim 1 and substantially as hereinbefore described.
12. A fibre reinforced plastics composite manufactured by the method of any preceding Claim.
13. Apparatus for carrying out the method of the first aspect, comprising a cylindrical, rectangular or other form of microwave cavity, or waveguide, which is designed in such a way that the composite passes through the apparatus and the electric field is absorbed substantially by the profile.
14. Apparatus as claimed in Claim 13, incorporating a shaping die through which the composite passes as it absorbs the electromagnetic energy.
15. Apparatus as claimed in Claim 13 or Claim 14, comprising a shaping die for the composite upstream of the curing means.
16. Apparatus as claimed in any one of Claims 13 to 15, comprising an overwinding station.
GB9304281A 1992-03-13 1993-03-03 Fibre reinforced plastic composites Withdrawn GB2265854A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB929205564A GB9205564D0 (en) 1992-03-13 1992-03-13 Fibre reinforced plastic composites

Publications (2)

Publication Number Publication Date
GB9304281D0 GB9304281D0 (en) 1993-04-21
GB2265854A true GB2265854A (en) 1993-10-13

Family

ID=10712114

Family Applications (2)

Application Number Title Priority Date Filing Date
GB929205564A Pending GB9205564D0 (en) 1992-03-13 1992-03-13 Fibre reinforced plastic composites
GB9304281A Withdrawn GB2265854A (en) 1992-03-13 1993-03-03 Fibre reinforced plastic composites

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB929205564A Pending GB9205564D0 (en) 1992-03-13 1992-03-13 Fibre reinforced plastic composites

Country Status (1)

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GB (2) GB9205564D0 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352964B3 (en) * 2003-11-13 2004-10-07 Deutsches Zentrum für Luft- und Raumfahrt e.V. Removing matrix resins from fiber-reinforced plastic components, preparatory to repair or joining, subjects defined region to microwave radiation
DE102008029056A1 (en) * 2008-06-18 2009-12-31 GKN Aerospace Services Limited, East Cowes Manufacturing method of fiber reinforced composite components with microwaves
EP2730397A1 (en) * 2012-11-07 2014-05-14 Airbus Operations GmbH Method of producing a composite shell element and composite shell element
WO2016133393A1 (en) * 2015-02-18 2016-08-25 Mocs Beheer B.V. Thermosetting composite article and method for producing the same
WO2018007814A1 (en) * 2016-07-06 2018-01-11 Williams Advanced Engineering Limited Manufacturing fibre-reinforced composite structures

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10352964B3 (en) * 2003-11-13 2004-10-07 Deutsches Zentrum für Luft- und Raumfahrt e.V. Removing matrix resins from fiber-reinforced plastic components, preparatory to repair or joining, subjects defined region to microwave radiation
DE102008029056A1 (en) * 2008-06-18 2009-12-31 GKN Aerospace Services Limited, East Cowes Manufacturing method of fiber reinforced composite components with microwaves
EP2730397A1 (en) * 2012-11-07 2014-05-14 Airbus Operations GmbH Method of producing a composite shell element and composite shell element
US9452561B2 (en) 2012-11-07 2016-09-27 Airbus Operations Gmbh Method of producing a composite shell element, composite shell element, means of transport and use
WO2016133393A1 (en) * 2015-02-18 2016-08-25 Mocs Beheer B.V. Thermosetting composite article and method for producing the same
NL2014306B1 (en) * 2015-02-18 2016-10-13 Mocs Beheer B V Thermosetting composite article and method for producing the same.
WO2018007814A1 (en) * 2016-07-06 2018-01-11 Williams Advanced Engineering Limited Manufacturing fibre-reinforced composite structures
KR20190039684A (en) * 2016-07-06 2019-04-15 윌리엄스 어드밴스드 엔지니어링 리미티드 Method for manufacturing fiber-reinforced composite structure
JP2019523162A (en) * 2016-07-06 2019-08-22 ウィリアムズ アドヴァンスド エンジニアリング リミテッド Fabrication of fiber reinforced composite structures
US10987833B2 (en) 2016-07-06 2021-04-27 Williams Advanced Engineering Limited Manufacturing fiber-reinforced composite structures
KR102250962B1 (en) * 2016-07-06 2021-05-11 윌리엄스 어드밴스드 엔지니어링 리미티드 Manufacturing method of fiber-reinforced composite structure

Also Published As

Publication number Publication date
GB9205564D0 (en) 1992-04-29
GB9304281D0 (en) 1993-04-21

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)