DE19617699A1 - Forming fibre reinforced plastic components from prepregs - Google Patents

Forming fibre reinforced plastic components from prepregs

Info

Publication number
DE19617699A1
DE19617699A1 DE19617699A DE19617699A DE19617699A1 DE 19617699 A1 DE19617699 A1 DE 19617699A1 DE 19617699 A DE19617699 A DE 19617699A DE 19617699 A DE19617699 A DE 19617699A DE 19617699 A1 DE19617699 A1 DE 19617699A1
Authority
DE
Germany
Prior art keywords
prepregs
stack
tool
heated medium
stacks
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Withdrawn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
DE19617699A
Other languages
German (de)
Inventor
Gunter Dr Ing Siebdrath
Petra Dr Ing Schulz
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.)
INSTITUT FUER KONSTRUKTION UND VERBUNDBAUWEISEN E.
Original Assignee
INST KONSTRUKTION und VERBUNDB
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 INST KONSTRUKTION und VERBUNDB filed Critical INST KONSTRUKTION und VERBUNDB
Priority to DE19617699A priority Critical patent/DE19617699A1/en
Publication of DE19617699A1 publication Critical patent/DE19617699A1/en
Withdrawn legal-status Critical Current

Links

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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of material
    • B29C51/004—Textile or other fibrous material made from plastics fibres
    • 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
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under pressure
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3086—Interaction between two or more components, e.g. type of or lack of bonding
    • B29C2949/3094—Interaction between two or more components, e.g. type of or lack of bonding preform having at least partially loose components, e.g. at least partially loose layers
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06905—Using combined techniques for making the preform
    • B29C49/0691—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • 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
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0809—Fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/001—Layered products the layers being loose

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

Fibre reinforced plastic components are made by placing a stack of prepregs (1) between two release films (2) and fusing them with a pressure plate (4) and a gaseous, liquid or solid heated medium (3). Immediately afterwards the component is shaped by the same medium (3). Also claimed is an analogous process where the stack of prepregs is fused and then shaped only by the heated medium. Also claimed is the process of simultaneous consolidation of several stacks of prepregs, with release film between them, by the heated medium. Also claimed is the simultaneous forming of two different components in the two halves of the mould by introducing the heated medium between two stacks of prepregs. Preferably the upper tool (5) is cooled (10) and has a heating ring (6) mounted on an insulating layer (7). The lower tool (4) is a hot plate (9). Hot compressed air (3) is supplied to consolidate the stack (1). Pressure in the upper tool cavity is then reduced to atmospheric or vacuum and the component formed. As it contacts the cold tool any irregularities in the surface are smoothed out. Cold flushing air is finally fed in to release the component. Variants shown are where the lower tool is replaced by another hot air cavity, or where the process is used to produce a stack of flat sheets or where two components are formed simultaneously in opposing mould spaces by introducing hot compressed air between two stacks of prepregs with a lance.

Description

Die Herstellung von Halbzeugen und Formteilen aus langfaserverstärkten Kunststoffen ist bekannt und erfolgt auf folgende Weisen:The production of semi-finished products and molded parts from long fiber reinforced plastics is known and takes place in the following ways:

  • - Imprägnieren von Verstärkungsfasern mit Kunststoffmatrix. Hierfür sind mehrere Möglichkeiten bekannt.- Impregnation of reinforcing fibers with a plastic matrix. There are several for this Possibilities known.
  • - Konsolidieren von Prepregs zu plattenförmigen Halbzeugen- Consolidation of prepregs into plate-shaped semi-finished products
  • - Verformung der plattenförmigen Halbzeuge zu Formteilen- Deformation of the plate-shaped semi-finished products into molded parts

Das Imprägnieren und Konsolidieren erfolgt konventionell auf Doppelband- oder Etagenpressen.The impregnation and consolidation takes place conventionally on double belt or Floor presses.

Nach beiden Verfahrensweisen entstehen Halbzeuge in Analogie zu Blechen der Metallverarbeitung, die dann kundenbezogen weiterverarbeitet werden.According to both procedures, semi-finished products are created in analogy to sheet metal Metal processing, which is then further processed in a customer-specific manner.

Dies ist mit folgenden Nachteilen verbunden:
Es ist eine erneute Erwärmung des konsolidierten Halbzeuges, verbunden mit doppelten Energieeinsatz, erforderlich. Dabei kann es zur thermischen Schädigung des Matrixwerkstoffes kommen.This has the following disadvantages:
It is necessary to reheat the consolidated semi-finished product combined with double the use of energy. This can lead to thermal damage to the matrix material.

Weiterhin ist auf Doppelbandpressen eine bauteilgerechte Faserplatzierung nur näherungsweise realisierbar. Furthermore, on double belt presses, component-specific fiber placement is only approximate realizable.  

Für die Verformung der plattenförmigen Halbzeuge zu Formteilen sind eine Reihe von Verfahren bekannt, als naheliegendes Verfahren wird in der DE 37 27 926 A1 ein Verfahren vorgestellt, mit dem zur Realisierung des Arbeitsschrittes Umformung ein vorkonsolidierter Halbzeugzuschnitt über eine Hilfsfolie, bestehend aus Aluminium, Gummi oder Kunststoff und unter Verwendung eines gasförmigen oder flüssigen Druckmediums in eine einteilige Form gedrückt wird.For the deformation of the plate-shaped semi-finished products into molded parts a number of methods are known, as an obvious method is in the DE 37 27 926 A1 presented a method with which to implement the work step Forming a pre-consolidated semi-finished product using an auxiliary film consisting of Aluminum, rubber or plastic and using a gaseous or liquid Media is pressed into a one-piece form.

Das Konsolidieren des Zuschnittes erfolgt außerhalb des Werkzeuges.The blank is consolidated outside the tool.

Dies ist vor allem bei der Verarbeitung von Matrixwerkstoffen, die einen engen Temperaturbereich für die Umformung aufweisen, nachteilig.This is especially true when processing matrix materials that are tight Have temperature range for the deformation, disadvantageous.

Der Prepregstapel kühlt während des Transfers von der Wärmequelle in das Umformwerkzeug und noch stärker bei Berührung an Werkzeugpartien schlagartig unter die Verarbeitungstemperatur ab, so daß eine faltenfreie Umformung nicht mehr möglich wird. Ein anderes Verfahren (WO 89/10253) führt aus diesem Grund im Umformwerkzeug nochmals Wärme nach. Nachteilig dabei ist die erforderliche längere Zykluszeit.The prepreg stack cools during transfer from the heat source to the forming tool and even more suddenly when touching tool parts under the Processing temperature from, so that a wrinkle-free forming is no longer possible. On For this reason, another method (WO 89/10253) leads again in the forming tool Heat after. A disadvantage here is the longer cycle time required.

Erfindungsgemäß erfolgen Konsolidierung und Umformung auf einem Werkzeug, entweder durch einseitige oder durch doppelseitige Beaufschlagung eines Prepregstapels mit einem gasförmigen, flüssigen o.a. Medium. Dabei sind die einzelnen Prepregs außerhalb des Werkzeuges bis auf ein Temperaturniveau unterhalb der Verarbeitungstemperatur bereits erwärmt.According to the invention, consolidation and forming take place on one tool, either by one-sided or double-sided loading of a prepreg stack with one gaseous, liquid or the like Medium. The individual prepregs are outside the Tool down to a temperature level below the processing temperature warmed up.

Erfolgt die Konsolidierung des Prepregstapels durch einseitige Beaufschlagung mit erhitztem Medium, vornehmlich mit erhitzter Druckluft, wird als Gegenform eine ebenfalls beheizte Platte verwendet (Fig. 1). In ein geöffnetes Werkzeug wird der Prepregstapel (1), eingebettet in zwei umformtüchtige temperaturbeständige Trennfolien (2) eingelegt.If the prepreg stack is consolidated by one-sided exposure to heated medium, primarily heated compressed air, a likewise heated plate is used as the counterform ( FIG. 1). The prepreg stack ( 1 ), embedded in two deformable, temperature-resistant separating foils ( 2 ), is placed in an open tool.

Das Werkzeugoberteil (5) ist mit einer Kühlung (10) versehen und über eine Dämmschicht (7) mit einem Heizring (6) verbunden. Das Werkzeugunterteil (4) ist über (9) heizbar ausgeführt.The upper part of the tool ( 5 ) is provided with cooling ( 10 ) and connected to a heating ring ( 6 ) via an insulation layer ( 7 ). The lower tool part ( 4 ) is heatable via ( 9 ).

Durch das einströmende erhitzte Medium (3) sowie Wärmefluß aus dem Werkzeugunterteil (9) erfolgt das Aufschmelzen des Matrixwerkstoffes und Verschweißen der Einzellagen (1) miteinander unter dem anstehenden Mediendruck. Nach Erreichen der für den Umformvorgang erforderlichen Viskosität im Matrixwerkstoff erfolgt Beaufschlagung mit erhitztem Medium (3) aus der unteren Werkzeugplatte (4), wobei vorher der Druck aus der Werkzeugkavität des Oberteiles (5) auf Normaldruck oder durch Anlegen von Vakuum auf einen niedrigeren Druck gesenkt wird. Bei Anlage des Prepregstapels (1, 2) an die kalte Werkzeugwand des Werkzeugoberteiles (5) werden konsolidierungsseitig bedingte Unebenheiten des Prepregstapels geglättet, unmittelbar danach erstarrt dieser im oberflächennahen Bereich sofort, eine weitere Erstarrung aus dem inneren wird erzielt durch Einleitung kalter Spülluft, dabei muß das Werkzeugoberteil (5) angelüftet werden.Due to the inflowing heated medium ( 3 ) and heat flow from the lower part of the tool ( 9 ), the matrix material is melted and the individual layers ( 1 ) are welded to one another under the medium pressure present. After the viscosity in the matrix material required for the forming process is reached, heated medium ( 3 ) is applied from the lower tool plate ( 4 ), the pressure from the tool cavity of the upper part ( 5 ) being reduced to normal pressure or by applying a vacuum to a lower pressure becomes. When the prepreg stack ( 1 , 2 ) is placed on the cold tool wall of the upper part of the tool ( 5 ), any unevenness in the prepreg stack caused by the consolidation is smoothed, immediately thereafter it solidifies in the area near the surface, further solidification from the inside is achieved by introducing cold purging air, thereby the upper part of the tool ( 5 ) can be lifted.

Erfolgt die Konsolidierung des Prepregstapels durch beidseitige Beaufschlagung mit erhitztem Medium, vornehmlich mit erhitzter Druckluft, ergibt sich die Möglichkeit, unter Verwendung nur eines Formwerkzeuges nacheinander zwei verschiedene Bauteile zu fertigen, indem nach Beendigung des Konsolidierungsvorganges die Druckbeaufschlagung entweder in die eine oder andere Richtung erfolgt (Fig. 2).If the prepreg stack is consolidated by exposure to heated medium on both sides, primarily with heated compressed air, it is possible to produce two different components in succession using only one molding tool, by either applying pressure in one direction or the other after the consolidation process has ended ( Fig. 2).

Der Werkzeugaufbau für Ober- und Unterteil (4, 5) entspricht sinngemäß der Darstellung nach Fig. 1, wobei sich die Werkzeugkavitäten gleichen oder unterscheiden können.The tool structure for the upper and lower part ( 4 , 5 ) corresponds analogously to the illustration according to FIG. 1, the tool cavities being the same or different.

Nach dem Anlegen des konsolidierten Materials an die gekühlte Werkzeugoberfläche erstarrt das Material zunächst wiederum oberflächennah. In der Folge wird an Stelle erhitzer, kalte Druckluft eingeblasen, wobei das Werkzeug in der Größenordnung 0,1-0,2 mm öffnet, und auf diese Weise einen Spülvorgang erlaubt. Nach ausreichender Erstarrung des Formteiles erfolgt dessen Entformung auf bekannte Weise.After the consolidated material has been applied to the cooled tool surface, it solidifies the material is again close to the surface. As a result, instead of it becomes heated, cold Blown in compressed air, the tool opening in the order of 0.1-0.2 mm, and open this allows a rinsing process. After the molded part has solidified sufficiently its demolding in a known manner.

Auf eine dritte Weise können in einem Arbeitsgang zwei aufeinanderliegende und nur durch Trennfolien voneinander getrennte Prepregstapel zu zwei verschiedenen oder gleichen Formteilen gleichzeitig umgeformt werden, indem nach Abschluß des Konsolidierungsvorganges das Druckmedium zwischen die beiden konsolidierten Stapel eingeleitet wird (Fig. 3).In a third way, two prepreg stacks lying on top of one another and only separated from one another by separating foils can be formed into two different or identical molded parts at the same time by introducing the printing medium between the two consolidated stacks after the consolidation process has been completed ( FIG. 3).

Das Werkzeug entspricht im Aufbau der Fig. 2. Nach Erzielung einer für die Verformung hinreichenden Viskosität erfolgt wiederum Druckentlastung in beiden Werkzeugkavitäten und in der Folge Eintrag des Druckmediums über die Lanze (11), dabei wirken die beiden innenliegenden Trennfolien (2) als Abdichtung auch im Bereich der eintauchenden Lanze.The structure of the tool corresponds to that of FIG. 2. After achieving a viscosity sufficient for the deformation, pressure is relieved in both tool cavities and subsequently the pressure medium is introduced via the lance ( 11 ), the two internal separating foils ( 2 ) also act as a seal in the area of the immersed lance.

Weiterhin können mehrere aufeinanderliegende, nur durch Trennfolien getrennte Prepregstapel durch einseitige oder beiderseitige Beaufschlagung mit einem o.g. Druckmedium konsolidiert werden (Fig. 4). Furthermore, a plurality of prepreg stacks lying one on top of the other, separated only by separating foils, can be consolidated by exposure to one or both sides of the above-mentioned printing medium ( FIG. 4).

Auf diese Weise ist unter Verwendung einfacher Betriebsmittel die Konsolidierung von Prepregstapeln möglich, da weder eine Doppelband- oder sonstige Presse benötigt wird. Über (8) erfolgt der Verschluß des Werkzeuges.In this way, the consolidation of prepreg stacks is possible using simple equipment, since neither a double-belt press or any other press is required. The tool is locked via ( 8 ).

Claims (4)

1. Verfahren zur Herstellung von Bauteilen aus faserverstärkten Thermoplasten, bei dem ein Stapel von Thermoplastlangfaserprepregs, eingebettet zwischen zwei Hilfsfolien, durch eine Konsolidierungsplatte sowie ein gasförmiges, flüssiges oder festes erwärmtes Medium miteinander verschweißt wird und unmittelbar anschließend durch das gleiche Medium zu einem Formteil umgeformt wird.1. Process for the production of components from fiber-reinforced thermoplastics, in which a Stack of thermoplastic long fiber prepregs, embedded between two auxiliary films, by one Consolidation plate and a gaseous, liquid or solid heated medium is welded together and immediately afterwards through the same medium a molded part is formed. 2. Verfahren zur Herstellung von Bauteilen aus faserverstärkten Thermoplasten, bei dem ein Stapel von Thermoplastlangfaserprepregs, eingebettet zwischen zwei Hilfsfolien durch ein gasförmiges, flüssiges oder festes erwärmtes Medium miteinander verschweißt wird und unmittelbar anschließend durch das gleiche Medium zu einem Formteil umgeformt wird.2. Process for the production of components from fiber-reinforced thermoplastics, in which a Stack of thermoplastic long fiber prepregs, embedded between two auxiliary films by one gaseous, liquid or solid heated medium is welded together and is then immediately formed into a molded part by the same medium. 3. Verfahren zur gleichzeitigen Konsolidierung mehrerer Prepregstapel durch ein gasförmiges, flüssiges oder festes erwärmtes Medium durch Anordnung von Trennfolien zwischen den einzelnen Prepregstapeln.3. Method for the simultaneous consolidation of several prepreg stacks by a gaseous, liquid or solid heated medium by arranging separating foils between the individual prepreg stacks. 4. Verfahren zur gleichzeitigen Konsolidierung zweier, durch Trennfolien getrennte Prepregstapel, durch ein gasförmiges, flüssiges oder festes erwärmtes Medium und unmittelbar daran anschließende gleichzeitige Umformung zu zwei verschiedenen Formteilen durch Einleitung des erwärmten Druckmediums zwischen beide Stapel.4. Process for the simultaneous consolidation of two, separated by separating foils Prepreg stack, through a gaseous, liquid or solid heated medium and immediately followed by simultaneous forming into two different ones Molded parts by introducing the heated pressure medium between the two stacks.
DE19617699A 1996-05-03 1996-05-03 Forming fibre reinforced plastic components from prepregs Withdrawn DE19617699A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19617699A DE19617699A1 (en) 1996-05-03 1996-05-03 Forming fibre reinforced plastic components from prepregs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19617699A DE19617699A1 (en) 1996-05-03 1996-05-03 Forming fibre reinforced plastic components from prepregs

Publications (1)

Publication Number Publication Date
DE19617699A1 true DE19617699A1 (en) 1997-11-06

Family

ID=7793178

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19617699A Withdrawn DE19617699A1 (en) 1996-05-03 1996-05-03 Forming fibre reinforced plastic components from prepregs

Country Status (1)

Country Link
DE (1) DE19617699A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7097731B2 (en) * 2001-04-06 2006-08-29 General Dynamics Armament And Technical Products, Inc Method of manufacturing a hollow section, grid stiffened panel
US7981241B2 (en) 2006-11-22 2011-07-19 Airbus Operations Limited Method for forming a feature in a piece of composite material
WO2014032638A1 (en) * 2012-08-27 2014-03-06 Ifc Composite Gmbh Method for simultaneous production of a plurality of leaf springs from a fibre composite material.
US9746046B2 (en) 2010-02-26 2017-08-29 Ifc Composite Gmbh Leaf spring made of a fiber composite material having integrated bearing eyes and method of producing said leaf spring
EP3812139A1 (en) * 2019-10-24 2021-04-28 Arrival Limited Manufacture of composite parts
WO2021079116A1 (en) * 2019-10-24 2021-04-29 Arrival Limited Composite panels and parts

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7097731B2 (en) * 2001-04-06 2006-08-29 General Dynamics Armament And Technical Products, Inc Method of manufacturing a hollow section, grid stiffened panel
US7981241B2 (en) 2006-11-22 2011-07-19 Airbus Operations Limited Method for forming a feature in a piece of composite material
US9746046B2 (en) 2010-02-26 2017-08-29 Ifc Composite Gmbh Leaf spring made of a fiber composite material having integrated bearing eyes and method of producing said leaf spring
WO2014032638A1 (en) * 2012-08-27 2014-03-06 Ifc Composite Gmbh Method for simultaneous production of a plurality of leaf springs from a fibre composite material.
AT516616B1 (en) * 2012-08-27 2016-07-15 Ifc Composite Gmbh Method for the simultaneous production of a plurality of leaf springs made of a fiber composite material
AT516616A5 (en) * 2012-08-27 2016-07-15 Ifc Composite Gmbh Method for the simultaneous production of a plurality of leaf springs made of a fiber composite material
EP3812139A1 (en) * 2019-10-24 2021-04-28 Arrival Limited Manufacture of composite parts
WO2021079116A1 (en) * 2019-10-24 2021-04-29 Arrival Limited Composite panels and parts

Similar Documents

Publication Publication Date Title
EP1729949B1 (en) Method for producing molded bodies from thermoplastic material
EP0433857B1 (en) Reaction injection molding apparatus for forming fibre-reinforced molded article
EP0993937B1 (en) Composite building panels with thermoplastic foam core and natural fibers and method and apparatus for manufacturing the same
US5047198A (en) Compression molding of composite parts on hot mold surfaces with a short cycle time
JP2751768B2 (en) Fiber-reinforced thermoplastic resin molded article and molding method thereof
US5194190A (en) Process for impregantion of glass fiber reinforcement with thermoplastic resins
DE60002159T2 (en) VACUUM CLAMP FOR COMPRESSING THERMOPLASTIC MATERIALS
EP1974893A2 (en) Apparatus for forming parts with patterns on its surface
EP0262490A1 (en) Method of manufacturing an injection-moulding manifold
EP0350633A1 (en) A die system and method for molding fiber reinforced plastic moldings
DE3727926C2 (en)
DE60105180T2 (en) FORM AND FORM APPLICATION FOR SUPERPLASTIC FORMING
DE10157655B4 (en) Method and device for the economical automatable production of components made of fiber composite plastics in the resin infusion or vacuum process
EP0363594B1 (en) Method and apparatus for making shaped parts or objects from thermoformable plastics using a deep-drawing technique
DE19617699A1 (en) Forming fibre reinforced plastic components from prepregs
EP0335098B1 (en) Compression molding of composite parts on hot mold surfaces with a short cycle time
DE19959654A1 (en) Process for the production of interior components of motor vehicles
EP0543085A1 (en) Method and apparatus for manufacturing laminated moulded objects
DE3441906A1 (en) Process for producing mouldings from thermoplastics-containing waste and from pure thermoplastics
DE102007012496B3 (en) Platen press for molded parts
WO1994003322A1 (en) Molded laminate and method of producing the same
DE102004019293A1 (en) Method of forming plastic plates
DE102008048298A1 (en) Method for embossing microstructures in flat thermoplastic plastic semi-finished products, such as plates or films, involves melting plastic surface area by coupling of ultrasonic energy
EP2692504B1 (en) Integrated contact heating for thermoplastically bonded mats in an injection moulding tool
DE202005005475U1 (en) Thermoformable sandwich composite workpiece for molding three-dimensional products comprises core, fiber reinforced resin and film facing layers enclosed in porous evacuation layers and covering films

Legal Events

Date Code Title Description
8122 Nonbinding interest in granting licences declared
8127 New person/name/address of the applicant

Owner name: INSTITUT FUER KONSTRUKTION UND VERBUNDBAUWEISEN E.

8139 Disposal/non-payment of the annual fee