IMPROVEMENTS IN OR RELATING TO THREE DIMENSIONAL MOULDINGS

The invention relates to a blank for compression moulding a part in a compression mould comprising one or more moulding recesses, said blank comprising a body formed from a first moulding compound comprising a fibrous reinforcement material and a thermo-curable resin material, and a region located on the surface of the body formed from a second moulding compound; said second moulding compound comprising a fibrous reinforcement material and a thermo-curable resin material, and exhibiting increased flow at one or more temperatures between 20° C. and the cured Tg of the first moulding compound compared to the flow of the first moulding compound at the same temperature.

METHOD OF MANUFACTURING A COMPOSITE PART

A method of preparing a stringer () and panel () lay-up comprising the steps of providing a stringer preform (), a panel preform (), a filler () and a mould (). The mould is adapted to define an inner surface of a stringer. The method further comprises the steps of arranging the stringer preform () to contact the mould (), placing filler () material between the mould () surface and stringer preform (), and bringing the reinforcement material () into contact with the panel preform (). The shape of the mould () is configured to control filler () placement and/or filler shape and/or filler volume. 1. A method of preparing a stringer or stiffener and panel lay-up comprising the steps of:a) providing a stringer preform which comprises a reinforcement material, a panel preform, a filler and a mould, the mould being adapted to define an inner surface of a stringer;b) arranging the stringer preform to contact the mould;c) placing filler material between the mould surface and stringer preform; andd) bringing the reinforcement material of the stringer preform into contact with the panel preform, wherein the shape of the mould is configured to control filler placement and/or filler shape and/or filler volume.2. (canceled)3. The method of wherein the mould has a volume equal to the enclosed volume of the stringer minus the volume of the filler.4. The method of wherein the stringer preform comprises at least one layer of dry reinforcement fibres.5. The method of wherein the panel preform comprises at least one layer of dry reinforcement fibres.6. The method of wherein filler material comprises dry fibre claim 1 , prepreg claim 1 , or cured composite material.7. The method of wherein steps b claim 1 , c and d are performed in sequence with step b preceding steps c and d.8. The method of comprising the additional step of removing the mould and replacing said mould with an inflatable bladder.9. The method of claim 8 , wherein the mould is removed prior to resin infusion of the ...

Intermediate composite element, production process and composite part

The invention relates to an intermediate composite element (200) comprising: - at least one molded portion (300) comprising an assembly of reinforcing fibers integrated into a thermoset polymer matrix, - at least one dry stack (400) of layers of reinforcing fibers, comprising at least one polymeric porous layer inserted between two successive layers of reinforcing fibers, the molded portion (300) being affixed to the surface of the stack and bonded to the latter, characterized in that the thermoset polymer penetrates into a portion of the thickness of the dry stack (400) from the surface of the dry stack (400) on which the molded portion (300) is affixed, thereby providing the bond between the dry stack (400) and the molded portion (300). The invention also relates to a process for the production thereof, the processes for producing composite parts using such an element and the resulting composite parts.

Intermediate composite element, manufacturing process and composite part

TITRE  : Elément composite intermédiaire, procédé de fabrication et pièce composite L’invention concerne élément composite intermédiaire (200) comprenant :- au moins une partie moulée (300) comprenant un ensemble de fibres de renfort intégrées dans une matrice de polymère thermodurci, -au moins un empilement sec (400) de couches de fibres de renfort,la partie moulée (300) étant apposée en surface de l’empilement et liée à ce dernier, caractérisé en ce que le polymère thermodurci pénètre dans une partie de l’épaisseur de l’empilement sec (400) à partir de la surface de l’empilement sec (400) sur laquelle la partie moulée (300) est apposée, ce qui assure la liaison entre l’empilement sec (400) et la partie moulée (300). L’invention a également pour objet un procédé pour sa fabrication, les procédés de fabrication de pièces composites utilisant un tel élément et les pièces composites ainsi obtenues. Figure pour l’abrégé : Fig. 4. TITLE: Intermediate composite element, method of manufacture and composite part The invention relates to intermediate composite element (200) comprising:- at least one molded part (300) comprising a set of reinforcing fibers integrated in a thermoset polymer matrix, -with at least one dry stack (400) of layers of reinforcing fibers, the molded part (300) being affixed to the surface of the stack and bonded to the latter, characterized in that the thermoset polymer penetrates into part of the thickness of the dry stack (400) from the surface of the dry stack (400) on which the molded part (300) is affixed, which provides the connection between the dry stack (400) and the molded part (300 ). The invention also relates to a process for its manufacture, the processes for manufacturing composite parts using such an element and the composite parts thus obtained. Figure for abstract: Fig. 4.

Intermediate composite element, method of manufacture and composite part

TITRE  : Elément composite intermédiaire, procédé de fabrication et pièce composite L’invention concerne élément composite intermédiaire (200) comprenant :- au moins une partie moulée (300) comprenant un ensemble de fibres de renfort intégrées dans une matrice de polymère thermodurci, -au moins un empilement sec (400) de couches de fibres de renfort,la partie moulée (300) étant apposée en surface de l’empilement et liée à ce dernier, caractérisé en ce que le polymère thermodurci pénètre dans une partie de l’épaisseur de l’empilement sec (400) à partir de la surface de l’empilement sec (400) sur laquelle la partie moulée (300) est apposée, ce qui assure la liaison entre l’empilement sec (400) et la partie moulée (300). L’invention a également pour objet un procédé pour sa fabrication, les procédés de fabrication de pièces composites utilisant un tel élément et les pièces composites ainsi obtenues. Figure pour l’abrégé : Fig. 4. TITLE: Intermediate composite element, method of manufacture and composite part The invention relates to intermediate composite element (200) comprising:- at least one molded part (300) comprising a set of reinforcing fibers integrated into a thermoset polymer matrix, -with at least one dry stack (400) of layers of reinforcing fibers, the molded part (300) being affixed to the surface of the stack and bonded to the latter, characterized in that the thermoset polymer penetrates into part of the thickness of the dry stack (400) from the surface of the dry stack (400) on which the molded part (300) is affixed, which provides the connection between the dry stack (400) and the molded part (300 ). The invention also relates to a process for its manufacture, the processes for manufacturing composite parts using such an element and the composite parts thus obtained. Figure for abstract: Fig. 4.

Improvements in or relating to three dimensional mouldings

The invention relates to a blank for compression moulding a part in a compression mould comprising one or more moulding recesses, said blank comprising a body formed from a first moulding compound comprising a fibrous reinforcement material and a thermo-curable resin material, and a region located on the surface of the body formed from a second moulding compound; said second moulding compound comprising a fibrous reinforcement material and a thermo-curable resin material, and exhibiting increased flow at one or more temperatures between 20°C and the cured Tg of the first moulding compound compared to the flow of the first moulding compound at the same temperature.

Élément composite intermédiaire, procédé de fabrication et pièce composite