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
  • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
  • B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
  • B29C70/865—Incorporated in coherent impregnated reinforcing layers, e.g. by winding completely encapsulated
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
  • B29B11/00—Making preforms
  • B29B11/14—Making preforms characterised by structure or composition
  • B29B11/16—Making preforms characterised by structure or composition comprising fillers or reinforcement
• • 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
  • B29C33/00—Moulds or cores; Details thereof or accessories therefor
  • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
  • B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
  • B29C33/50—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling elastic or flexible
  • B29C33/505—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling elastic or flexible cores or mandrels, e.g. inflatable
• • 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
  • B29C70/06—Fibrous reinforcements only
  • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
  • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
  • B29C70/24—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least three directions forming a three dimensional structure
• • 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
  • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
  • B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D11/00—Double or multi-ply fabrics not otherwise provided for
  • D03D11/02—Fabrics formed with pockets, tubes, loops, folds, tucks or flaps
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D25/00—Woven fabrics not otherwise provided for
  • D03D25/005—Three-dimensional woven fabrics
• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
  • D03D3/00—Woven fabrics characterised by their shape
  • D03D3/02—Tubular 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
  • B29L2031/00—Other particular articles
  • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
  • B29L2031/3067—Ships
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2505/00—Industrial
  • D10B2505/02—Reinforcing materials; Prepregs
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
  • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]

Definitions

• the invention relates to a method of manufacturing a piece of shape by three-dimensional weaving, (called 3D weaving) of very strong weft threads and warp threads, for example made of carbon fibers, in order to obtain a preform then impregnated with thermosetting resin. It relates more particularly to an improvement to create cavities in said piece of form.
• thermosetting resin For the manufacture of shaped parts with high mechanical strength, especially with respect to impact, it is known to use carbon fibers coated with thermosetting resin.
• any part can be formed by cutting woven webs of pre-impregnated carbon fiber threads, stacking them to obtain a blank of the desired workpiece and fusing them under heat and pressure.
• the document EP 1 77763 describes a more efficient method for manufacturing a shaped part, in this case a turbomachine blade, by 3D weaving of weft yarns and warp yarns. This process makes it possible to obtain parts of exceptional strength, in particular very good impact resistance, without risk of delamination.
• the invention aims an improvement of this type of process for the manufacture of a piece of any shape as it is necessary to lighten and / or provide a passage.
• the invention therefore relates to a method of manufacturing a shaped piece, consisting in producing a 3 D woven preform, by weaving weft son through a bundle of warp son arranged in different layers and impregnating this preform with a hardenable resin, characterized in that it consists, during weaving # practicing partial debonding between two warp son plies and expanding said preform by creating a desired shape cavity through said loosening and then impregnating said preform, thus shaped, by said resin.
• Untying is a peculiarity of weaving which consists in not passing through a certain plane of the bundle of warp threads (more exactly a part of this plane) by any weft thread.
• an advantageous loosening in the context of the invention is obtained by ensuring that, at least from a certain stage of weaving, each weft yarn is woven normally on the sides of the preform being formed. but without ever crossing a central flat area defined between two layers of warp son.
• the operation of creating said cavity is performed by introducing an inflatable piece in the preform at the location of said looseness and by filling this inflatable piece with a fluid to give it the shape and dimensions of the desired cavity. After impregnation, the fluid and possibly the inflatable piece are extracted from the cavity thus created.
• the invention also relates to any shaped part obtained by 3D weaving of a preform and by impregnation of this preform by means of a curable resin, characterized in that it comprises a cavity defined by expansion of said preform made possible by a loosening during 3D weaving.
• the form piece may constitute a rudder or a boat drift.
• the invention will be better understood and other advantages thereof will appear more clearly in the light of the description which follows. a method of manufacturing a workpiece conforming to its principle, given solely by way of example and with reference to the accompanying drawings, in which:
• FIG. 1 is a diagrammatic view illustrating the 3D weaving of a preform, for the manufacture of a piece of shape such as a rudder or a boat fin;
• FIG. 3 schematically illustrates the shaped preform by developing a cavity filled with a rigid material of lower density
• FIG. 5 is a variant of FIG. 2 schematically illustrating another woven preform; and - Figure 6 schematically illustrates the shaping of the preform of Figure 5.
• Figure 1 illustrates the weaving of a preform 11 to be converted into a boat rudder.
• a jacquard loom is used on which a bundle 12 of warp yarns or strands having a number of layers of several hundred threads each is arranged.
• the mechanism is such that one can act on each of these son transversely to the warp son plies as shown, to insert the weft son 14.
• a number of warp son are not woven, which allows to define the contour and the desired thickness, continuously variable, said preform.
• the warp and weft threads are cut at the limit of the woven mass in order to extract the preform 11. This is shown in FIG. 2, as it comes from 3D weaving and before any According to an important characteristic, the weaving is accompanied by a partial loosening 19 between two layers of warp threads and within a planar zone defined by the contour 16, in FIG.
• this loosening is a particularity of weaving which has the consequence of creating a pocket 18, here open at one end of the woven mass, which can be expanded during a subsequent shaping operation, before impregnation with thermosetting resin.
• the preform 11 of the future rudder is then shaped by introducing into this pocket 18, a block of low density material 20 having substantially the shape and dimensions of the desired cavity. This operation has the effect of giving the preform a form closer to that of the desired rudder. This is the situation illustrated in Figure 3.
• the step illustrated in Figure 4 is a conventional step of impregnating the preform with thermosetting resin.
• the preform formed by the introduction of the block of low density material 20 is transported in a mold 22 forming an oven, for the injection of the thermosetting resin.
• the rudder is completed by machining and by adding a maneuvering shaft attached to one of its ends. It should be noted that this tree can also be essentially obtained by weaving at one end of the preform. It is also possible to report such an element to one end of the preform, before or after impregnation.
• Figures 5 and 6 illustrate a variant for the manufacture of a hollow-shaped part forming part of any structure.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Woven Fabrics (AREA)
• Moulding By Coating Moulds (AREA)
• Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=40897434

Family Applications (1)

Country Status (9)

Families Citing this family (17)

Citations (4)

Family Cites Families (14)

• 2008
  • 2008-12-23 FR FR0858996A patent/FR2940173B1/fr active Active
• 2009
  • 2009-12-22 RU RU2011130855/05A patent/RU2513202C2/ru active
  • 2009-12-22 CN CN2009801522167A patent/CN102264518A/zh active Pending
  • 2009-12-22 CA CA2748006A patent/CA2748006A1/fr not_active Abandoned
  • 2009-12-22 BR BRPI0923626A patent/BRPI0923626A2/pt not_active IP Right Cessation
  • 2009-12-22 EP EP09805775A patent/EP2373469A1/fr not_active Withdrawn
  • 2009-12-22 WO PCT/FR2009/052654 patent/WO2010072967A1/fr active Application Filing
  • 2009-12-22 US US13/141,852 patent/US20110318513A1/en not_active Abandoned
  • 2009-12-22 JP JP2011542875A patent/JP2012513322A/ja active Pending

Patent Citations (4)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events