EP0608186B1 - Ski und Verfahren zur Herstellung eines Skis mit gespritztem Kern und gelochter innerer Verstärkungseinlage - Google Patents

Ski und Verfahren zur Herstellung eines Skis mit gespritztem Kern und gelochter innerer Verstärkungseinlage Download PDF

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Publication number
EP0608186B1
EP0608186B1 EP94420012A EP94420012A EP0608186B1 EP 0608186 B1 EP0608186 B1 EP 0608186B1 EP 94420012 A EP94420012 A EP 94420012A EP 94420012 A EP94420012 A EP 94420012A EP 0608186 B1 EP0608186 B1 EP 0608186B1
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EP
European Patent Office
Prior art keywords
ski
reinforcement
fabric
synthetic material
constituted
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.)
Expired - Lifetime
Application number
EP94420012A
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English (en)
French (fr)
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EP0608186A1 (de
Inventor
François Jodelet
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.)
Skis Rossignol SA
Original Assignee
Skis Rossignol SA
Rossignol SA
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Application filed by Skis Rossignol SA, Rossignol SA filed Critical Skis Rossignol SA
Publication of EP0608186A1 publication Critical patent/EP0608186A1/de
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Publication of EP0608186B1 publication Critical patent/EP0608186B1/de
Anticipated expiration legal-status Critical
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/12—Making thereof; Selection of particular materials

Definitions

  • the present invention relates to a method of manufacturing a ski with an injected core, for example with a core of injected polyurethane foam, an openwork fabric being embedded, as internal reinforcement, in this injected core. It also relates to a ski with an injected core, and with an openwork internal reinforcement fabric, produced by this process.
  • the skis with injected synthetic foam core benefit from a relative simplicity of manufacture.
  • a ski To have good qualities of mechanical resistance and behavior on snow, a ski must be flexible longitudinally to follow the shape of the terrain, in particular hollows and bumps, while being nervous enough to quickly return to its initial shape. On the other hand, it must be rather rigid in lateral bending in order to always keep the shape of the edge line which allows the ski to be driven correctly when cornering.
  • Document FR-A-2,611,517 describes a so-called "box structure" ski which is provided with reinforcements constituted by lateral resistance walls which follow the external shape of the ski. At the edges of the ski, the angle of inclination of these lateral resistance walls is then variable along the body of the ski. This variation in inclination results in a variation in resistance which is consequently dependent on the external shape of the ski.
  • Document FR-A-2,553,669 shows, in a ski with an injected core, the use of a reinforcing member which is embedded in the injected foam and which consists of an openwork fibrous fabric.
  • the positioning of this reinforcement in the mold is random. It is simply placed on a base and may move during the injection of the components of the polyurethane foam, under the effect of the flow and the expansion of the latter.
  • the conventional manufacturing process consists in depositing against the walls of the mold the components which constitute the envelope of the ski (the sole, the edges, the top and the edges), then in injecting the expandable foam inside the cavity thus formed.
  • This reinforcement tube is however not sufficient to give the ski the optimum qualities of flexural stiffness and that are generally desired.
  • another reinforcing member is formed in the lower part of the mold, and at the same time as said lower elements of the ski, consisting of an openwork tube and shaped from a mesh.
  • the invention also relates to a ski with a core of injected synthetic material, this ski comprising an internal reinforcement which is embedded in the synthetic material and which consists of a fabric of fiberglass or other fibrous material, this fabric being largely openwork and also being provided with a malleable metal frame made of spaced metal wires which is capable of allowing easy and persistent pre-deformation of this fabric in order to give it a desired shape in advance, the internal reinforcement being positioned at a distance of the internal face of the upper part of the ski which is constituted by at least the upper shell which constitutes the external decor element of the ski, and the internal reinforcement being separated from this same upper part of the ski by an upper reinforcement plate intended to promote the screwing of fasteners and spacers which are formed by cords or pellets of a pasty and sticky product, such as an adhesive "hot melt", these spacers also being embedded in the synthetic material.
  • an upper reinforcement plate intended to promote the screwing of fasteners and spacers which are formed by cords or pellets of a pasty and sticky product,
  • this reinforced fabric reinforcement has a general shape of a short inverted gutter, it has a length limited to a few tens of centimeters, and, being located at the level of the skate area, longitudinally encompasses this skate area to extend from on either side of it. If, for example, this skid zone extends over approximately 500 millimeters along the longitudinal axis of the ski, the reinforced fabric is placed under the upper reinforcement plate intended to promote the tightening of the bindings, and its length is approximately 600 to 1200 millimeters so that it protrudes, in the longitudinal direction, on either side of this skid zone, that is to say in fact of this upper reinforcement plate.
  • this reinforced dry fabric is chosen to be of sufficient width so that its two lateral edges come to bear, directly or indirectly, on the two respective lateral edges of the ski. It thus constitutes, for the edges, a support element which opposes their sinking.
  • ski 1 with a core 2 of injected polyurethane foam.
  • Such a ski is thicker and less wide at the level of the pad area p, where the bindings are placed, than at its ends.
  • a ski of this type is, for example, composed of a sliding sole 3, of metal side edges 4.5, of a core 2 of polyurethane or other material, and of an outer shell 6, which is formed by '' at least one layer of thermoplastic material and which carries the decorative pattern of the ski.
  • an upper reinforcing blade 7 is provided, made of rigid material such as a composite of glass fiber and prepolymerized epoxy resin, which is intended to allow a solid and easy fixing of the fasteners.
  • a lower reinforcing strip 8 rests practically on the two lateral edges 4,5.
  • This blade 8 is for example made of aluminum alloy.
  • This ski is, in a manner known per se, already improved by the fact that a long flattened and perforated tube 9, fairly rigid, is embedded in the polyurethane foam 2.
  • This tube 9 is for example made from '' A fairly rigid, polymerized resin mesh. It extends practically over the entire length of the ski 1, from the heel 10 to the birth 11 of the tip 12.
  • another reinforcing element 13 is embedded in the polyurethane 2, at the level of the pad area p. More precisely, this additional reinforcement 13 longitudinally encompasses this pad area p and is slightly longer in length than this, so that it exceeds it on either side in the longitudinal direction. Its length L is for example of the order of 600 to 1200 millimeters for a pad area p of 500 millimeters long.
  • this additional reinforcement 13 is of the order of a few tens of centimeters. Its shape is that of a short inverted gutter.
  • this reinforcement 13 is chosen to be of sufficient width so that its two lateral edges 14 and 15 can come to bear on the two respective lateral edges 4 and 5 of the ski 1. In this way, this reinforcement 13 not only serves to improve the resistance in lateral flexion and torsion of the ski, but it also serves as a solid reinforcement coming to hold the edges 4 and 5 by opposing their sinking.
  • This reinforcement 13 is made of reinforced dry fabric, this fabric being currently commonly used for the creation of watertight hulls, for example for the construction of swimming pools as well as pleasure boats.
  • This armed dry fabric which is therefore commercially available, is shown flat in Figure 3.
  • this dry fabric is a fairly openwork dry fabric, in glass fibers in the general case, which is very strongly provided with warp threads (longitudinal) 16 and very weakly provided with weft threads (transverse) 17.
  • this dry fabric is reinforced with metallic weft threads 18, fairly widely spaced from each other.
  • This metal frame 18 makes it possible to give this fabric a residual curvature, in cross section.
  • this fabric is still made of fiberglass yarns, but it has more noble yarns such as aramid yarns or carbon yarns.
  • the openwork nature of the fabric allows the passage of polyurethane foam in order to drown the reinforcement 13 in the structure of the ski 1, and therefore to confer on the fiber of this fabric all its mechanical qualities.
  • This reinforcement 13 is kept at a distance from the lower surface of the shell 6, and more precisely at the level of the pad area p of the plate 7, by virtue of the prior interposition of spacers 19, 20 which are formed by cords longitudinal in a pasty and sticky product, such as "hot melt” adhesive.
  • the metal frame 18 of this fabric makes it possible to preform this fabric 13 in the form of a gutter.
  • the blade 7 is first glued in place under the decor plate 6, then the fabric 13 is shaped into an inverted gutter and is positioned, by interposition of the sticky cords 19 and 20, under the blade 7 and at a vertical distance therefrom.
  • the sole 3, the edges 4.5, the reinforcement 8 and the tube 9, having then been placed as usual in the mold 21, the complex formed by the plate 6, the blade 7, the cords 19.20, and the dry fabric 13 is then embedded as shown in this slurry 21, where it assumes a shape quite distant from its final shape.
  • the polyurethane foam 2 is then injected, passing through the perforated elements 9 and 13, pressing the shell against the walls of the mold 21, 22, correctly repositioning the various internal elements of the ski to give them their final shape, as shown in Figure 7.
  • the cover 22 is removed, and the ski can be removed from the mold and be subjected to the finishing operations: deburring, sanding, etc.
  • the fabric 13 is originally cut in a rectangular shape. It could be otherwise, and, according to Figure 8, this form of cutting could be that of a non-rectangular parallelogram: the ski 1 would then have a right-left asymmetry, which can be advantageous in certain cases. It should be noted of course that this right-left asymmetry could be imparted to the ski by giving this fabric 13 an asymmetry with respect to the median longitudinal axis 33 of the ski which would be due to any other form than that of a non-parallelogram. rectangular.
  • this ski may not include the tubular mesh reinforcement 9 above, but only the reinforcement 13 which could then possibly be a little longer.
  • this same reinforcement 13 could be shaped to have one or more lateral folds 23, 24 capable of considerably strengthening its solidity at the side faces of the ski, which has the effect of considerably strengthening the structure in lateral bending.
  • These folds 23, 24 are positioned substantially at the level of the neutral fiber of the ski.
  • these two reinforcements 13 may, for the two skis 27, 28 of the same pair, have, according to FIG. 13, each one single return, respectively 261 and 251, each of these returns being identical to returns 25 and 26 according to Figure 11 and the reinforcement 13 which can moreover retain a shape of an inverted gutter of asymmetrical appearance because it is thicker on one of its lateral faces. More generally, the reinforcement 13 can be shaped or positioned so as to present more material on the side of the inner edges of each ski of the same pair.

Landscapes

  • Injection Moulding Of Plastics Or The Like (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Laminated Bodies (AREA)
  • Moulding By Coating Moulds (AREA)

Claims (16)

  1. Verfahren zur Herstellung eines Skis (1) mit Kern (2) aus eingespritztem synthetischen Material, wobei der Ski eine innere Verstärkung (13) aufweist, die in dem synthetischen Material eingebettet ist und aus einem Gewebe (16, 17) aus Glasfaser oder einem anderen Fasermaterial besteht, wobei das Gewebe stark durchbrochen ist und außerdem eine verformbare metallische Bewehrung (18) aus beabstandeten metallischen Drähten hat, die eine einfache und bleibende Vorverformung dieses Gewebes ermöglicht, um ihm vorab eine gewünschte Form zu verleihen, wobei das Verfahren die folgenden Schritte aufweist:
    - Vorbereiten einer Anordnung aus mehreren übereinanderliegenden und zuvor zusammengebauten Elementen, darunter u.a., aufeinanderfolgend von oben nach unten:
    . der obere Teil (6, 7) des Skis, der zumindest aus der Platte (6) besteht, die das ggf. verzierte Schutzelement des Skis bildet, und
    . das dachziegelartige vorverformte Verstärkungsgewebe (13), das, von diesem oberen Teil (6, 7) beabstandet, durch Kleben vormontiert wird, und zwar Einschieben von Raupen oder Tabletten (19, 20) aus einem pastenartigen und klebenden Produkt, wie einem "hot melt"-Klebstoff;
    - Einlegen der unteren Elemente des Skis in den unteren Teil (21) der Gießform: üblicherweise die Kanten (4, 5), die Sohle (3), die eine oder mehreren unteren Verstärkungsplatten (8), etc...;
    - Krümmen der oberen Anordnung (6, 7, 13) in die Form einer umgekehrten Dachrinne, um sie in den unteren Teil (21) der Gießform einzuspannen; und
    - Verschließen der Gießform mit Hilfe ihres Deckels (22) mit umgekehrt U-förmigem Querschnitt, Einspritzen des synthetischen Materials (2) und schließlich Durchführen der üblichen Schritte zum Abkühlen, Öffnen der Gießform, Herausnehmen, Entgraten und Polieren des Skis, etc...
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß man in den unteren Teil (21) der Gießform oberhalb der unteren Elemente (4, 5, 3, 8) des Skis ein weiteres Verstärkungselement einlegt, das aus einem durchbrochenen Rohr (9) besteht und aus einem Gitter geformt ist.
  3. Ski mit einem Kern (2) aus eingespritztem synthetischen Material, hergestellt gemäß dem Verfahren nach Anspruch 1 oder 2, wobei der Ski eine innere Verstärkung (13) aufweist, die in dem synthetischen Material eingebettet ist und aus einem Gewebe (16, 17) aus Glasfaser oder einem anderen Fasermaterial besteht, wobei das Gewebe stark durchbrochen ist und außerdem eine verformbare metallische Bewehrung (18) aus beabstandeten metallischen Drähten hat, die eine einfache und bleibende Vorverformung dieses Gewebes ermöglicht, um ihm vorab eine gewünschte Form zu verleihen, wobei:
    . die innere Verstärkung (13) beabstandet von dem oberen Teil (6, 7) des Skis angeordnet ist, der zumindest aus der oberen Schale (6) besteht,
    . und wobei dieselbe innere Verstärkung (13) von demselben oberen Teil (6, 7) des Skis über Zwischenstücke getrennt ist, die aus Raupen oder Tabletten (19, 20) aus einem pastenartigen und klebenden Produkt, wie einem "hot melt"-Klebstoff bestehen, wobei auch diese Zwischenstücke in dem synthetischen Material (2) eingebettet sind.
  4. Ski nach Anspruch 3, dadurch gekennzeichnet, daß die Verstärkung (13) die Form einer kurzen umgekehrten Dachrinne hat.
  5. Ski nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Verstärkung (13) im Schuhbereich (p) angeordnet ist.
  6. Ski nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß die Verstärkung (13) eine auf einige zehn Zentimeter begrenzte Länge hat.
  7. Ski nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß die Verstärkung (13) aus bewehrtem Gewebe den Schuhbereich (p) in Längsrichtung umgibt, so daß sie sich beiderseits etwas darüber hinaus erstreckt.
  8. Ski nach Anspruch 7, dadurch gekennzeichnet, daß bei einer Länge des Schuhbereichs (p) von etwa 500 Millimetern und bei unter der oberen, zur Erleichterung des Anschraubens der Bindung dienenden Verstärkungsplatte (7) vertikal beabstandet von dieser angeordnetem Gewebe die Länge der Verstärkung (13) aus bewehrtem Gewebe etwa 600 bis 1200 Millimeter beträgt.
  9. Ski nach einem der Ansprüche 3 bis 8, dadurch gekennzeichnet, daß die Verstärkung aus bewehrtem Gewebe (13) mit einer ausreichenden Breite gewählt wird, damit ihre beiden seitlichen Ränder (14, 15) auf den jeweiligen beiden seitlichen Kanten (4, 5) des Skis direkt oder indirekt aufliegen.
  10. Ski nach einem der Ansprüche 3 bis 9, dadurch gekennzeichnet, daß die Verstärkung aus bewehrtem Gewebe (13) eine Form (Figur 8 und 13) hat, die bezüglich der Mittenlängsachse (33) des Skis asymmetrisch ist.
  11. Ski nach einem der Ansprüche 3 bis 10, dadurch gekennzeichnet, daß das Verstärkungsgewebe (13) bezüglich der Mittenlängsachse des Skis asymmetrisch (Figur 12) positioniert ist.
  12. Ski nach einem der Ansprüche 3 bis 11, dadurch gekennzeichnet, daß die Verstärkung (13) derart ausgebildet ist, daß sie einen oder mehrere seitliche Falze (24) hat.
  13. Ski nach Anspruch 12, dadurch gekennzeichnet, daß der oder die seitlichen Falze (24) im wesentlichen auf der Höhe der neutralen Faser des Skis (1) angeordnet sind.
  14. Ski nach einem der Ansprüche 3 bis 13, dadurch gekennzeichnet, daß die Verstärkung (13) so geformt ist, daß sie seitlich einen Umschlag oder Umschläge (25, 26) bildet, welcher bzw. welche die Dicke der einen und/oder der anderen der seitlichen Flächen der Verstärkung (13) zumindest verdoppelt bzw. verdoppeln.
  15. Ski nach einem der Ansprüche 10 bis 14, dadurch gekennzeichnet, daß die Verstärkung (13) so geformt oder angeordnet ist, daß sie auf der Seite der Innenkanten (41, 51) jedes Skis (27, 28) eines selben Paares mehr Material aufweist.
  16. Ski nach einem der Ansprüche 3 bis 15, dadurch gekennzeichnet, daß er außerdem eine weitere Verstärkung (9) aufweist, die in dem synthetischen Material (2) ebenfalls eingebettet ist, die aus einem Gitterrohr besteht und die unter der Verstärkung (13) aus bewehrtem Material angeordnet ist.
EP94420012A 1993-01-19 1994-01-12 Ski und Verfahren zur Herstellung eines Skis mit gespritztem Kern und gelochter innerer Verstärkungseinlage Expired - Lifetime EP0608186B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9300685 1993-01-19
FR9300685A FR2700479B1 (fr) 1993-01-19 1993-01-19 Procédé de fabrication d'un ski à noyau injecté et à renfort interne ajouré, et ski obtenu par ce procédé.

Publications (2)

Publication Number Publication Date
EP0608186A1 EP0608186A1 (de) 1994-07-27
EP0608186B1 true EP0608186B1 (de) 1996-06-05

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EP94420012A Expired - Lifetime EP0608186B1 (de) 1993-01-19 1994-01-12 Ski und Verfahren zur Herstellung eines Skis mit gespritztem Kern und gelochter innerer Verstärkungseinlage

Country Status (5)

Country Link
US (1) US5498016A (de)
EP (1) EP0608186B1 (de)
AT (1) ATE138818T1 (de)
DE (1) DE69400221T2 (de)
FR (1) FR2700479B1 (de)

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Publication number Priority date Publication date Assignee Title
ATE156378T1 (de) * 1995-02-01 1997-08-15 Blizzard Gmbh Verfahren zur herstellung eines skis
US5782482A (en) * 1996-01-30 1998-07-21 K-2 Corporation Snowboard and method of construction
GB9921784D0 (en) 1999-09-16 1999-11-17 British Aerospace A method of producing a joint
AT411869B (de) * 1999-12-22 2004-07-26 Atomic Austria Gmbh Brettartiges gleitgerät, insbesondere schi oder snowboard
US20030222420A1 (en) * 2002-06-01 2003-12-04 Hadzicki David Herbert Composit sport board
ATE486641T1 (de) * 2002-09-24 2010-11-15 Tyrolia Technology Gmbh Gleitbrett, insbesondere ski, und verfahren zur herstellung
FR2863901A1 (fr) * 2003-12-18 2005-06-24 Skis Dynastar Planche de glisse sur neige a renfort interne et procede de fabrication
AT501312B1 (de) * 2005-02-04 2009-05-15 Hexcel Holding Gmbh Verfahren zur herstellung eines gleitgeräts und gleitgerät
EP1693089B1 (de) * 2005-02-16 2009-01-07 Skis Rossignol Gleitbrett
DE102005054985A1 (de) * 2005-11-16 2007-05-24 Marker Völkl International GmbH Schneegleitbrett sowie Schalenbauteil für ein Schneegleitbrett
US20090045605A1 (en) * 2007-08-17 2009-02-19 Pat Keane Snow ski
FR2925344A1 (fr) * 2007-12-20 2009-06-26 Dynastar Skis Sa Planche de glisse sur neige et jeu d'au moins deux telles planches de glisse sur neige
FR2926735B1 (fr) * 2008-01-25 2010-03-26 Salomon Sa Ski alpin avec moyens de reglage
US20180229092A1 (en) * 2017-02-13 2018-08-16 Cc3D Llc Composite sporting equipment

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US3918731A (en) * 1975-02-05 1975-11-11 Rossignol Sa Cross-country ski
DE3437865A1 (de) * 1983-10-21 1985-05-09 Kabushiki Kaisha Swallow Ski, Iiyama, Nagano Herstellungsverfahren fuer skier
US5056807A (en) * 1987-10-21 1991-10-15 Norton Company Ski construction
FR2643564A1 (fr) * 1989-02-27 1990-08-31 Salomon Sa Ski a section transversale ayant, au moins dans sa partie centrale, sensiblement la forme d'un trapeze isocele
FR2654644B1 (fr) * 1989-11-22 1992-03-13 Salomon Sa Procede de fabrication d'un ski injecte, et structure de ski obtenue par ce procede.
FR2654670A1 (fr) * 1989-11-23 1991-05-24 Rossignol Sa Procede pour la fabrication en une seule operation d'une structure moulee complexe, notamment un ski, et structure moulee complexe ainsi obtenue.
DE69029384T2 (de) * 1990-03-27 1997-06-12 Sekisui Fine Chemical Co Abstandshalter und Verfahren zu deren Herstellung sowie Verfahren zur Herstellung einer Flüssigkristallzelle unter Benutzung dieser Abstandshalter
FR2672810B1 (fr) * 1991-02-14 1993-04-23 Salomon Sa Ski alpin destine a glisser sur la neige et sur la glace.
FR2684012B1 (fr) * 1991-11-22 1994-08-05 Rossignol Sa Ski en forme, de section non rectangulaire.

Also Published As

Publication number Publication date
DE69400221T2 (de) 1996-11-28
DE69400221D1 (de) 1996-07-11
ATE138818T1 (de) 1996-06-15
EP0608186A1 (de) 1994-07-27
US5498016A (en) 1996-03-12
FR2700479B1 (fr) 1995-02-24
FR2700479A1 (fr) 1994-07-22

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