WO2005123500A1 - Procede pour fabriquer des structures tridimensionnelles - Google Patents

Procede pour fabriquer des structures tridimensionnelles Download PDF

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Publication number
WO2005123500A1
WO2005123500A1 PCT/IT2005/000323 IT2005000323W WO2005123500A1 WO 2005123500 A1 WO2005123500 A1 WO 2005123500A1 IT 2005000323 W IT2005000323 W IT 2005000323W WO 2005123500 A1 WO2005123500 A1 WO 2005123500A1
Authority
WO
WIPO (PCT)
Prior art keywords
tridimensional
threads
initial
external
superposition
Prior art date
Application number
PCT/IT2005/000323
Other languages
English (en)
Inventor
Piermario Raimondo Timpanari
Marco Giannoni
Franco Ciccarelli
Original Assignee
Be 1 S.R.L.
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 Be 1 S.R.L. filed Critical Be 1 S.R.L.
Publication of WO2005123500A1 publication Critical patent/WO2005123500A1/fr

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
    • 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
    • B29C70/545—Perforating, cutting or machining during or after 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
    • 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

Definitions

  • tridimensional structures like: tensile structures, architectonic roofing of various kinds, or sails for boats, consists in covering the relevant surfaces with partially superimposed panels formed of structured fabric, so as to be able to support the expected working load. These panels, which are called “cloths”, are superimposed in such a way that by their ordered and repeated combination the desired tridimensional contour can be obtained.
  • cloths are superimposed in such a way that by their ordered and repeated combination the desired tridimensional contour can be obtained.
  • very sophisticated assembling techniques are employed in order to obtain a high efficiency of the tridimensional structure.
  • the present invention provide a method of manufacture of tridimensional structures which are suited to resist to working loads that may be more or less high, without incurring the expenses and problems typical of presently commercialized unidirectional fabrics, both when these fabrics are specifically manufactured or when they are purchased for the purpose of assembling them like panels.
  • Fig. 1 shows the initial plane structure realized on a pavement or planar surface, wherein 1 denotes the threads or bundles of structural threads, 2 is the net used to prevent transversal sliding movements of said threads, and 3 refers to the lines of superposition between individual cloths.
  • Fig. 2 shows the planar structure which has been cut into horizontal cloths, before the latter are superimposed and joined to give rise to the final, desired tridimensional structure.
  • Fig. 3 illustrates the final, desired tridimensional structure, according to the manufacturing method of the present invention, wherein the structural threads are arranged on the triangular surface with curvilinear behavior, without carrying out repeated superposition of the threads or thread bundles.
  • the method of manufacture of tridimensional structures according to the present invention is based on the simple concept of initially creating a planar structure, like that shown in Fig. 1, which is slightly larger than the desired tridimensional structure.
  • This planar structure will be subsequently horizontally cut into horizontal cloths, as shown in Fig. 2, so as to obtain - according to a technique known to all skilled persons in this field - independent cloths that are partially superimposed according to the depth or maximum camber to be attributed to the final tridimensional structure.
  • Said initial planar structure may be easily decomposed (divided) into a variable number of horizontal cloths, as shown in Fig. 2, by effecting simple horizontal cuts by means of scissors, since it is structurally very thin.
  • the very small thickness of the structure is a consequence of the innovative method of the present invention, given that the initial planar structure is formed by two or more thin, external polymeric films, consisting of (for instance, but not limited to) polyester or polypropylene, or of any other similar polymer with similar thickness, containing between them an interposed supporting net formed of (for instance, but not limited to) polyester, carbon, or aramid fibres, this net allowing the robust threads or bundles of inextensible fiber threads - which are also located inside the structure - , to be firmly anchored to the same structure, thereby preventing undesired lateral sliding movements and displacements. Said threads, or inextensible bundles of threads 1, as shown in Fig.
  • curvilinear structural threads will therefore be oriented along the curvilinear lines of force of the structure itself, and will approximately follow its tridimensional contour. Said threads, or structural thread bundles, will be twisted and subsequently flattened by a simple mechanical squeezing process, onto the initial planar structure, before the assembling of the latter is completed with the application of the upper polymeric layer.
  • the arrangement of the structural threads avoids repeated and excessive superposition between said threads or bundles of threads at the points of greatest load of the structure, thereby preventing delamination, internal dislocations of the bearing surface, and excessive thickness increase that would noticeably hinder said division of the initial structure into independent cloths.
  • the cloths themselves will be cut according to this tridimensional parameter and according to the dimensions of the available working table, without resorting to expensive apparatus used for lamination, such as an expensive press or rolls (calender).
  • the final tridimensional structure will consequently have a smaller size than the initial flat surface and will be smaller exactly by an amount corresponding to the extension of the superposition zones that have been obtained, and depending on the depth amount that has been attributed this structure.
  • the object of the present invention is to disclose a new method for manufacturing tridimensional structures endowed with a noticeable shape stability and that are easy and extremely cheap to manufacture compared with the elaborate manufacturing technologies currently in use.
  • This method for the production of tridimensional structures starting from a plane surface as shown in Fig. 1, will be easy to carry out for a technician of average skill, and will do without any kind of data processing means or any instrument or apparatus apt to pretension (prestress) said structural threads which are arranged between the external polymeric films; moreover it is much more economical than any other already known method.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

L'invention concerne une méthode pour fabriquer des surfaces tridimensionnelles présentant une stabilité de forme considérable. Cette méthode fait appel, en tant que plan de travail, à une surface parfaitement plane ou à une surface pavée. La forme voulue de la surface tridimensionnelle finale est obtenue par une superposition partielle de panneaux longitudinaux qui ont été obtenus tour à tour par la coupe horizontale d'une surface monobloc initialement plane.
PCT/IT2005/000323 2004-06-18 2005-06-08 Procede pour fabriquer des structures tridimensionnelles WO2005123500A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000302A ITRM20040302A1 (it) 2004-06-18 2004-06-18 Metodo per la realizzazione di strutture tridimensionali.
ITRM2004A000302 2004-06-18

Publications (1)

Publication Number Publication Date
WO2005123500A1 true WO2005123500A1 (fr) 2005-12-29

Family

ID=35033291

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2005/000323 WO2005123500A1 (fr) 2004-06-18 2005-06-08 Procede pour fabriquer des structures tridimensionnelles

Country Status (2)

Country Link
IT (1) ITRM20040302A1 (fr)
WO (1) WO2005123500A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2918920A1 (fr) * 2007-07-16 2009-01-23 Hexcel Reinforcements Etabliss Procede de fabrication de pieces composites presentant au moins une zone courbe
WO2008155505A3 (fr) * 2007-06-12 2009-03-19 Hexcel Reinforcements Procede de fabrication de pieces composites presentant au moins une zone courbe et pieces obtenues par ce procede

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0475083A1 (fr) * 1990-08-21 1992-03-18 North Sails Group, Inc Voile de tissu tridimensionnelle laminé en une seule pièce avec des fils porte-charges ininterrompus
US5097783A (en) * 1988-10-17 1992-03-24 Dimension Polyant Sailcloth, Inc. Reinforced sailcloth
FR2694947A1 (fr) * 1992-08-20 1994-02-25 Rossignol Pascal Procédé de réalisation de voile pour tout engin ou dispositif à portance et/ou à propulsion vélique.
US6169605B1 (en) * 1991-01-31 2001-01-02 Texas Instruments Incorporated Method and apparatus for the computer-controlled manufacture of three-dimensional objects from computer data
EP1114771A1 (fr) * 1999-12-02 2001-07-11 Rox Sails (Ireland) Limited Matériau composite, en particulier pour des toiles de voilier
US6382120B1 (en) * 2001-05-02 2002-05-07 Fred Aivars Keire Seamed sail and method of manufacture

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5097783A (en) * 1988-10-17 1992-03-24 Dimension Polyant Sailcloth, Inc. Reinforced sailcloth
EP0475083A1 (fr) * 1990-08-21 1992-03-18 North Sails Group, Inc Voile de tissu tridimensionnelle laminé en une seule pièce avec des fils porte-charges ininterrompus
US6169605B1 (en) * 1991-01-31 2001-01-02 Texas Instruments Incorporated Method and apparatus for the computer-controlled manufacture of three-dimensional objects from computer data
FR2694947A1 (fr) * 1992-08-20 1994-02-25 Rossignol Pascal Procédé de réalisation de voile pour tout engin ou dispositif à portance et/ou à propulsion vélique.
EP1114771A1 (fr) * 1999-12-02 2001-07-11 Rox Sails (Ireland) Limited Matériau composite, en particulier pour des toiles de voilier
US6382120B1 (en) * 2001-05-02 2002-05-07 Fred Aivars Keire Seamed sail and method of manufacture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008155505A3 (fr) * 2007-06-12 2009-03-19 Hexcel Reinforcements Procede de fabrication de pieces composites presentant au moins une zone courbe et pieces obtenues par ce procede
US9702065B2 (en) 2007-06-12 2017-07-11 Hexcel Reinforcements, S.A.S. Method for making composite parts having at least one curved area
FR2918920A1 (fr) * 2007-07-16 2009-01-23 Hexcel Reinforcements Etabliss Procede de fabrication de pieces composites presentant au moins une zone courbe

Also Published As

Publication number Publication date
ITRM20040302A1 (it) 2004-09-18

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