FR2667013A1 - Tool for the moulding of a part made from composite material - Google Patents
Tool for the moulding of a part made from composite material Download PDFInfo
- Publication number
- FR2667013A1 FR2667013A1 FR9011599A FR9011599A FR2667013A1 FR 2667013 A1 FR2667013 A1 FR 2667013A1 FR 9011599 A FR9011599 A FR 9011599A FR 9011599 A FR9011599 A FR 9011599A FR 2667013 A1 FR2667013 A1 FR 2667013A1
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- FR
- France
- Prior art keywords
- cover
- matrix
- punch
- enclosure
- tool according
- 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.)
- Granted
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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
- 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
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- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
- B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/001—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a flexible element, e.g. diaphragm, urged by fluid pressure; Isostatic presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
- B30B5/02—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of a flexible element, e.g. diaphragm, urged by fluid pressure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
On connaît, notamment par FR-A-2 566 322, des outillages de moulage d'une pièce réalisée en matériau composite, un tel outillage comprenant une matrice rigide ; un couvercle rigide de fermeture de la matrice, susceptible d'être rendu solidaire de la matrice ; un poinçon constitué par une paroi susceptible d'être déformée, contenu à l'intérieur de la matrice et comportant un rebord susceptible d'être pincé entre la matrice et le couvercle. Are known, in particular from FR-A-2 566 322, tools for molding a part made of composite material, such a tool comprising a rigid matrix; a rigid cover for closing the matrix, capable of being made integral with the matrix; a punch constituted by a wall capable of being deformed, contained inside the matrix and comprising a rim capable of being pinched between the matrix and the cover.
Selon la technique connue, la pression appliquée à l'élément déformable est obtenue par l'intermédiaire d'un insert métallique rigide soumis aux efforts d'application d'un vérin hydraulique, et d'un élastomère silicone qui se dilate sous l'effet de la chaleur. According to the known technique, the pressure applied to the deformable element is obtained by means of a rigid metal insert subjected to the forces of application of a hydraulic cylinder, and of a silicone elastomer which expands under the effect heat.
Bien que, en théorie, les efforts engendrés soient isostatiques, il est constaté, qu'en pratique, il est très difficile de contrôler la pression dont les effets s'exercent sur le matériau à mouler.Although, in theory, the forces generated are isostatic, it has been found that, in practice, it is very difficult to control the pressure, the effects of which are exerted on the material to be molded.
L'invention a pour but l'obtention d'un meilleur contrôle des effets de la pression et d'une simplification de l'outillage de finition de la pièce moulée. The object of the invention is to obtain better control of the effects of pressure and a simplification of the tool for finishing the molded part.
A cet effet, selon l'invention, les caractéristiques suivantes sont adoptées : a) la paroi du poinçon est préformée et a une forme externe initiale sensiblement complémentaire de la forme interne de la pièce à réaliser ; b) le poinçon, après pincement de son rebord entre la matrice et le couvercle, délimite avec ce dernier une enceinte gonflable, ledit pincement étant réalisé avec réalisation d'une étanchéité ; c) un conduit d'admission d'un fluide sous pression à l'intérieur de ladite enceinte débouche dans la face du couvercle délimitant l'enceinte. To this end, according to the invention, the following characteristics are adopted: a) the wall of the punch is preformed and has an initial external shape substantially complementary to the internal shape of the part to be produced; b) the punch, after pinching its rim between the die and the cover, delimits with the latter an inflatable enclosure, said pinching being carried out with a seal; c) a conduit for admission of a pressurized fluid inside said enclosure opens into the face of the cover delimiting the enclosure.
Les avantageuses dispositions suivantes sont en outre de préférence adoptées
- le poinçon comporte au moins une zone renforcée par addition à la matière le constituant, dans chacune desdites zones renforcées, d'un matériau complémentaire de renforcement, tel qu'une charge de silice
- au moins une zone renforcée est adjacente à une arête formée par l'intersection de deux faces distinctes que comporte ledit poinçon
- selon une première variante, la matrice munie dudit couvercle est placée entre les plateaux d'une presse qui assure l'assujettissement du couvercle sur la matrice, cependant qu'un moyen de chauffage, tel qu'un plateau chauffant de la presse, assure le chauffage du fluide admis à l'intérieur de ladite enceinte
- selon une deuxième variante, le couvercle est assujetti à la matrice par un dispositif autonome d'assujettissement, l'ensemble de la matrice et du couvercle préalablement fixé sur la matrice par l'intermédiaire dudit dispositif d'assujettissement étant placé à l'intérieur d'un four de chauffage du fluide admis à l'intérieur de ladite enceinte.The following advantageous arrangements are also preferably adopted
- The punch comprises at least one reinforced zone by addition to the material constituting it, in each of said reinforced zones, of a complementary reinforcement material, such as a silica filler
- at least one reinforced zone is adjacent to an edge formed by the intersection of two distinct faces that comprises said punch
- According to a first variant, the die provided with said cover is placed between the plates of a press which secures the cover to the matrix, while a heating means, such as a heating plate of the press, ensures heating of the fluid admitted inside said enclosure
- According to a second variant, the cover is secured to the matrix by an independent securing device, the whole of the matrix and the cover previously fixed to the matrix by means of said securing device being placed inside a furnace for heating the fluid admitted inside said enclosure.
Les avantages principaux de l'invention résident effectivement dans l'obtention d'un meilleur moulage, plus régulier qu'auparavant et d'une finition améliorée de la pièce moulée achevée. The main advantages of the invention actually lie in obtaining a better, more regular molding than before and an improved finish of the finished molded part.
L'invention sera mieux comprise, et des caractéristiques secondaires et leurs avantages apparaîtront au cours de la description de réalisations donnée ci-dessous à titre d'exemple. The invention will be better understood, and secondary characteristics and their advantages will appear during the description of embodiments given below by way of example.
Il est entendu que la description et les dessins ne sont donnés qu'à titre indicatif et non limitatif. It is understood that the description and the drawings are given for information only and are not limiting.
Il sera fait référence aux dessins annexés, dans lesquels
- les figures 1 et 2 sont des coupes de deux outillages conformes à l'invention ; et,
- les figures 3 et 4 montrent, schématiquement, deux installations de mise en oeuvre des outillages des figures 1 et 2, respectivement.Reference will be made to the accompanying drawings, in which
- Figures 1 and 2 are sections of two tools according to the invention; and,
- Figures 3 and 4 show, schematically, two installations for implementing the tools of Figures 1 and 2, respectively.
Les réalisations représentées concernent des moules pour la réalisation de pièces en matériaux composites tels que des résines armées de fibres de renforcement. The embodiments shown relate to molds for producing parts made of composite materials such as resins reinforced with reinforcing fibers.
Chacun des moules des figures 1 et 2 comprend
- une matrice rigide 1 comportant une ouverture 2 délimitée par un rebord 3, plan dans les exemples représentés
- un couvercle 4 susceptible de recouvrir ladite ouverture et d'être assujetti à la matrice 1 par des moyens divers, tels que ceux représentés sur les figures 3 et 4
- un poinçon 5 constitué par une paroi en élastomère silicone, déformable, évidée, préformée avec une face externe SA sensiblement complémentaire de celle de la face interne 6A de la pièce 6 à mouler ;;
- une jaquette 7, mince (épaisseur de l'ordre de 0,5 mm), réalisée en un matériau poreux, tel qu'un feutre, interposée entre, d'une part, la face externe SA du poinçon 5, d'autre part, à sa partie supérieure, la face interne 1A de la matrice 1, et, à sa partie inférieure, la face interne 6A de la pièce 6
- des conduits 8, qui traversent la partie supérieure des parois de la matrice, débouchent dans la matrice 1 en regard de la jaquette poreuse 7, et sont reliés à un dispositif (non représenté) de mise sous vide du volume délimité entre la matrice 1 et la face externe SA du poinçon 5 en étant en outre susceptibles d'être munis de valves de raccordement ; en variante, les conduits 8 pourraient être raccordés à la pression atmosphérique
- un conduit 9 d'admission, à l'intérieur de l'enceinte 10 délimitée par la face interne 5B du poinçon 5 et le couvercle, d'un fluide sous pression, conduit 9 qui débouche à l'intérieur de cette enceinte 10, dans la face 4A du couvercle 4 qui délimite l'enceinte qui est relié à une source de fluide sous pression, telle qu'une pompe (également non représentée), et qui est muni de valves d'arrêt de maintien de la pression et de relâchement de la pression dans l'enceinte 10.Each of the molds in Figures 1 and 2 includes
- a rigid matrix 1 comprising an opening 2 delimited by a rim 3, plane in the examples shown
- A cover 4 capable of covering said opening and of being subject to the matrix 1 by various means, such as those represented in FIGS. 3 and 4
- A punch 5 constituted by a silicone elastomer wall, deformable, hollowed out, preformed with an external face SA substantially complementary to that of the internal face 6A of the part 6 to be molded;
- a thin jacket 7 (thickness of the order of 0.5 mm), made of a porous material, such as a felt, interposed between, on the one hand, the external face SA of the punch 5, on the other share, at its upper part, the internal face 1A of the die 1, and, at its lower part, the internal face 6A of the part 6
- conduits 8, which pass through the upper part of the walls of the matrix, open into the matrix 1 opposite the porous jacket 7, and are connected to a device (not shown) for evacuating the volume delimited between the matrix 1 and the external face SA of the punch 5 being also capable of being provided with connection valves; alternatively, the conduits 8 could be connected at atmospheric pressure
an intake duct 9, inside the enclosure 10 delimited by the internal face 5B of the punch 5 and the cover, of a pressurized fluid, duct 9 which opens out inside this enclosure 10, in the face 4A of the cover 4 which delimits the enclosure which is connected to a source of pressurized fluid, such as a pump (also not shown), and which is provided with stop valves for maintaining the pressure and for release of pressure in enclosure 10.
A noter que le poinçon 5 comporte un rebord 11, qui est placé, et en fait pincé entre le rebord 3 de l'ouverture 2 de la matrice et le couvercle 4 et réalise ainsi une étanchéité entre ces deux pièces. Note that the punch 5 has a rim 11, which is placed, and in fact pinched between the rim 3 of the opening 2 of the die and the cover 4 and thus achieves a seal between these two parts.
Par ailleurs, la face externe SA de chaque poinçon 5 comporte en coupe deux faces verticales et un fond horizontal (figure 1) ou légèrement incliné par rapport à l'horizontale (figure 2) qui délimitent à leurs intersections deux arêtes 5C. Dans les zones 12 adjacentes auxdites arêtes, le matériau constitutif du poinçon 5 - ici, un élastomère silicone -, est chargé en un matériau de renforcement qui en augmente la densité et la dureté. Furthermore, the external face SA of each punch 5 has in section two vertical faces and a horizontal bottom (FIG. 1) or slightly inclined with respect to the horizontal (FIG. 2) which delimit two edges 5C at their intersections. In the zones 12 adjacent to said edges, the material constituting the punch 5 - here, a silicone elastomer - is loaded with a reinforcing material which increases its density and hardness.
Le moule de la figure 1 peut, par exemple, être placé entre les plateaux 13 et 14 d'une presse 15, qui maintiennent le couvercle 4 fermement assujetti à la matrice 1, en réalisant l'étanchéité entre le rebord 11 du poinçon 5 et lesdits couvercle et matrice. En outre, le plateau supérieur 14 peut être chauffant (résistance électrique 16) permettant ainsi de chauffer le fluide sous pression introduit dans l'enceinte 10. Le plateau inférieur peut également être chauffant. The mold of FIG. 1 can, for example, be placed between the plates 13 and 14 of a press 15, which keep the cover 4 firmly secured to the die 1, by sealing between the flange 11 of the punch 5 and said cover and matrix. In addition, the upper plate 14 can be heated (electrical resistance 16) thereby heating the pressurized fluid introduced into the enclosure 10. The lower plate can also be heated.
Le moule de la figure 2, tel qu'utilisé dans la disposition de la figure 4, a son couvercle 4 assemblé à la matrice 1 au moyen de tirants 17, qui traversent de part en part ses parois, et d'écrous 18. Ce moule est placé à l'intérieur d'un four 19 de chauffage du fluide sous pression contenu dans l'enceinte 10. The mold of Figure 2, as used in the arrangement of Figure 4, has its cover 4 assembled to the die 1 by means of tie rods 17, which pass right through its walls, and nuts 18. This mold is placed inside a furnace 19 for heating the pressurized fluid contained in the enclosure 10.
Les remarques suivantes peuvent alors être formulées
- le fait que la forme externe SA du poinçon 5 soit déjà proche, en l'absence de tout fluide sous pression à l'intérieur de l'enceinte 10, de la forme de la face interne 6A de la pièce 6 à mouler, qu'en outre le matériau dans lequel la pièce 6 est réalisée est une résine armée de fibres, permet de placer les différents éléments dans une configuration proche de la configuration finale
- l'admission d'un fluide sous pression à l'intérieur de l'enceinte 10 permet ainsi de réaliser l'opération de finition de pièces 10 déjà ébauchées
- la transmission des forces de la pression régnant dans l'enceinte 10 aux parois du poinçon 5 est isostatique, ce qui est gage de l'obtention d'une finition satisfaisante des surfaces de la pièce 6
- de plus, lors du chauffage du fluide sous pression enfermé dans l'enceinte 10, il y a gonflage du poinçon 5 (en élastomère silicone) et par suite élévation de la pression à l'intérieur de l'enceinte 10 ; le circuit de mise en pression peut être mis en service ou hors service à tout moment choisi, la pression ayant une valeur réglable au moyen d'un détendeur
- le rebord 11 du poinçon réalise une double étanchéité : entre lui-même et le couvercle 4, vis-à-vis de la pression régnant dans l'enceinte 10, et, entre lui-même et le rebord 3 de l'ouverture 2 vis-à-vis du vide réalisé au moyen des conduits 8
- les renforcements, par charges complémentaires de silice, par exemple, de la dureté du poinçon 5 dans les zones 12 permettent l'obtention d'une stabilité de forme satisfaisante dudit poinçon et par conséquent une reproduction fidèle des formes désirées de la pièce 6
- enfin, les outillages décrits sont simples, peu coûteux, ne nécessitent pas d'installations spéciales puissantes et coûteuses il s'agit d'ensembles d'outillages particulièrement aptes à permettre la réalisation de pièces 6 en cours de développement, dont les formes définitives risquent de n'être pas encore complètement définies
- la jaquette poreuse 7 permet l'évacuation de la pression entre le poinçon 5 et la matrice 1, lors de la dilation (par gonflage) du poinçon 5 et, en outre, absorbe les éventuels déchets résineux de la pièce 6.The following remarks can then be made
the fact that the external shape SA of the punch 5 is already close, in the absence of any fluid under pressure inside the enclosure 10, to the shape of the internal face 6A of the part 6 to be molded, which furthermore the material in which the part 6 is made is a resin reinforced with fibers, makes it possible to place the various elements in a configuration close to the final configuration
- the admission of a pressurized fluid inside the enclosure 10 thus makes it possible to carry out the operation of finishing parts 10 already roughed
- The transmission of the forces of the pressure prevailing in the enclosure 10 to the walls of the punch 5 is isostatic, which is a guarantee of obtaining a satisfactory finish of the surfaces of the part 6
- In addition, during the heating of the pressurized fluid enclosed in the enclosure 10, there is inflation of the punch 5 (made of silicone elastomer) and consequently an increase in the pressure inside the enclosure 10; the pressurization circuit can be put into service or out of service at any time chosen, the pressure having a value adjustable by means of a pressure reducer
- The rim 11 of the punch achieves a double seal: between itself and the cover 4, vis-à-vis the pressure prevailing in the enclosure 10, and, between itself and the rim 3 of the opening 2 vis-à-vis the vacuum created by means of the conduits 8
- the reinforcements, by additional silica charges, for example, of the hardness of the punch 5 in the zones 12 allow obtaining a satisfactory shape stability of said punch and therefore a faithful reproduction of the desired shapes of the part 6
- Finally, the tools described are simple, inexpensive, do not require powerful and expensive special installations. These are sets of tools particularly suitable for enabling the production of parts 6 under development, the final shapes of which are may not yet be fully defined
the porous jacket 7 allows the pressure between the punch 5 and the die 1 to be evacuated during expansion (by inflation) of the punch 5 and, moreover, absorbs any resinous waste from part 6.
- les résines utilisées conformément à l'invention sont des polyimides, et les plages de pression sont comprises entre 1 et 1,5
Mpa et celles de températures entre 3000C et 3500C, tout au moins dans les réalisations essayées.- the resins used in accordance with the invention are polyimides, and the pressure ranges are between 1 and 1.5
Mpa and those of temperatures between 3000C and 3500C, at least in the realizations tested.
L'invention n'est pas limitée aux réalisations représentées, mais en couvre au contraire toutes les variantes qui pourraient leur être apportées sans sortir de leur cadre, ni de leur esprit. The invention is not limited to the embodiments shown, but on the contrary covers all the variants which could be made to them without departing from their scope or their spirit.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9011599A FR2667013B1 (en) | 1990-09-20 | 1990-09-20 | TOOLS FOR MOLDING A PART MADE OF COMPOSITE MATERIAL. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9011599A FR2667013B1 (en) | 1990-09-20 | 1990-09-20 | TOOLS FOR MOLDING A PART MADE OF COMPOSITE MATERIAL. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2667013A1 true FR2667013A1 (en) | 1992-03-27 |
| FR2667013B1 FR2667013B1 (en) | 1994-06-03 |
Family
ID=9400480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9011599A Expired - Fee Related FR2667013B1 (en) | 1990-09-20 | 1990-09-20 | TOOLS FOR MOLDING A PART MADE OF COMPOSITE MATERIAL. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2667013B1 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0572248A1 (en) * | 1992-05-28 | 1993-12-01 | British Aerospace Public Limited Company | Manufacture of articles from composite material |
| WO1996007532A1 (en) * | 1994-09-09 | 1996-03-14 | Decta Holdings Pty. Ltd. | Improved method of manufacturing composites |
| FR2759624A1 (en) * | 1997-02-20 | 1998-08-21 | Snecma | BLADDER MOLDING PROCESS WITH COMPOSITE MATERIAL THIN PIECE CONFORMER |
| US6149844A (en) * | 1994-09-09 | 2000-11-21 | Decta Holdings Pty Ltd. | Method of manufacturing composites |
| WO2006014825A1 (en) * | 2004-07-26 | 2006-02-09 | The Boeing Company | Methods and systems for manufacturing composite parts with female tools |
| WO2006039124A2 (en) * | 2004-09-29 | 2006-04-13 | The Boeing Company | Apparatuses, systems, and methods for manufacturing composite parts |
| WO2008099197A2 (en) * | 2007-02-16 | 2008-08-21 | Vnf Designs (Europe) Ltd. | Method and apparatus for manufacturing carbon-fibre reinforced polymer structures |
| EP2116358A1 (en) | 2008-05-09 | 2009-11-11 | Saab Ab | Method and apparatus for conforming a blank |
| US7655168B2 (en) | 2006-01-31 | 2010-02-02 | The Boeing Company | Tools for manufacturing composite parts and methods for using such tools |
| EP2266785A1 (en) | 2009-06-22 | 2010-12-29 | Eurocopter Deutschland GmbH | Apparatus and method for taking up, positioning and draping dry textile fibre semi-finished products |
| US8465613B2 (en) | 2011-08-24 | 2013-06-18 | The Boeing Company | Method and apparatus for fabricating variable gauge, contoured composite stiffeners |
| US8557165B2 (en) | 2008-10-25 | 2013-10-15 | The Boeing Company | Forming highly contoured composite parts |
| US8601694B2 (en) | 2008-06-13 | 2013-12-10 | The Boeing Company | Method for forming and installing stringers |
| US9254619B2 (en) | 2008-05-28 | 2016-02-09 | The Boeing Company | Method and apparatus for fabricating variable gauge, contoured composite stiffeners |
| US9387628B2 (en) | 2011-08-24 | 2016-07-12 | The Boeing Company | Method and apparatus for fabricating composite stringers |
| FR3063674A1 (en) * | 2017-03-09 | 2018-09-14 | Safran Aircraft Engines | MECHANICAL PRESSURE APPLICATION DEVICE, IMPREGNATION METHOD, AND BONDING METHOD |
| US10369740B2 (en) | 2015-07-09 | 2019-08-06 | The Boeing Company | Method of forming a contoured hat stiffener |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8388795B2 (en) | 2007-05-17 | 2013-03-05 | The Boeing Company | Nanotube-enhanced interlayers for composite structures |
| US8042767B2 (en) | 2007-09-04 | 2011-10-25 | The Boeing Company | Composite fabric with rigid member structure |
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| GB2160467A (en) * | 1984-06-22 | 1985-12-24 | Rolls Royce | Moulding of composite materials |
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|---|---|---|---|---|
| US2363107A (en) * | 1941-07-19 | 1944-11-21 | Jesse B Hawley | Expandible plastic mold |
| US2532442A (en) * | 1942-03-09 | 1950-12-05 | Daly Le Grand | Molded article |
| US2451483A (en) * | 1946-06-14 | 1948-10-19 | Sport Products Inc | Method of making protective helmets |
| FR2162296A1 (en) * | 1971-12-10 | 1973-07-20 | Vinzelles Pierre De | Moulding resin impregnated fibres - using a mould lined with a flexible pressurised and heated bag |
| US4202856A (en) * | 1977-09-30 | 1980-05-13 | Rockwell International Corporation | Graphite-epoxy molding method |
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Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0572248A1 (en) * | 1992-05-28 | 1993-12-01 | British Aerospace Public Limited Company | Manufacture of articles from composite material |
| WO1996007532A1 (en) * | 1994-09-09 | 1996-03-14 | Decta Holdings Pty. Ltd. | Improved method of manufacturing composites |
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Also Published As
| Publication number | Publication date |
|---|---|
| FR2667013B1 (en) | 1994-06-03 |
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