EP0608186A1 - Ski and process of manufacturing a ski with injected core and through-hole internal reinforcement - Google Patents

Ski and process of manufacturing a ski with injected core and through-hole internal reinforcement Download PDF

Info

Publication number
EP0608186A1
EP0608186A1 EP94420012A EP94420012A EP0608186A1 EP 0608186 A1 EP0608186 A1 EP 0608186A1 EP 94420012 A EP94420012 A EP 94420012A EP 94420012 A EP94420012 A EP 94420012A EP 0608186 A1 EP0608186 A1 EP 0608186A1
Authority
EP
European Patent Office
Prior art keywords
ski
reinforcement
fabric
mold
synthetic material
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.)
Granted
Application number
EP94420012A
Other languages
German (de)
French (fr)
Other versions
EP0608186B1 (en
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
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 Skis Rossignol SA, Rossignol SA filed Critical Skis Rossignol SA
Publication of EP0608186A1 publication Critical patent/EP0608186A1/en
Application granted granted Critical
Publication of EP0608186B1 publication Critical patent/EP0608186B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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.
  • the 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 rigidity D is a function of the square of the distance d which separates the reinforcement from the neutral fiber of the ski.
  • This reinforcement tube is however not sufficient to give the ski the optimum qualities of flexural and torsional rigidity which are generally desired.
  • 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 in advance a desired shape, and this ski being characterized in that this internal reinforcement is positioned at a distance from 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 in that this internal reinforcement is separated from this same upper part of the ski by an upper reinforcement plate intended to favor the screwing of the bindings and spacers which are constituted by cords or pads of a p pasty and sticky product, such as a "hot melt” adhesive, these spacers also being embedded in the synthetic material.
  • this internal reinforcement is positioned at a distance from the internal face of the upper part of the ski which
  • 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 fixings.
  • 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 which maintains 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 reinforced 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 always 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.
  • two strands 19 and 20 of a sticky, self-adhesive paste are provided between the reinforcing blade 7 and the dry fabric 13, and so as to maintain in the mold this dry fabric at a vertical distance from this blade 7. , of the "hot melt” type.
  • 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 beads 19 and 20, under the blade 7 and at a vertical distance from the latter.
  • 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 mold 21, where it assumes a shape that is quite far 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, such 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 parallelogram. non-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)

Abstract

It includes a through-hole internal reinforcement (13) made from reinforced fabric, which is short, located at the level of the runner, in the form of an inverted trough and which is separated from the upper face (topsheet) (6, 7) of the ski by spacers (19, 20) made from "hot-melt" adhesive beads. When fabricating the mould, these beads (19, 20) make it possible to preposition this reinforcement (13) while keeping it at a distance from the upper face (6, 7). <IMAGE>

Description

La présente invention se rapporte à un procédé de fabrication d'un ski à noyau injecté, par exemple à noyau en mousse de polyuréthanne injectée, un tissu ajouré étant noyé, en guise de renfort interne, dans ce noyau injecté. Elle se rapporte aussi à un ski à noyau injecté, et à tissu de renfort interne ajouré, réalisé par ce procédé.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.

Les skis à noyau en mousse synthétique injectée bénéficient d'une relative simplicité de fabrication.The skis with injected synthetic foam core benefit from a relative simplicity of manufacture.

Pour posséder de bonnes qualités de résistance mécanique et de comportement sur neige, un ski doit être flexible longitudinalement pour épouser la forme du terrain, en particulier les creux et les bosses, tout en étant suffisamment nerveux pour revenir alors rapidement à sa forme initiale. Il doit en revanche être plutôt rigide en flexion latérale pour conserver toujours la forme de la ligne de carres qui permet de conduire correctement le ski en virage.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.

En prévoyant des organes de renfort à l'intérieur de la structure du ski, et en agissant sur la nature, la forme, et le positionnement de ces renforts, il est possible de modifier les caractéristiques de ce ski pour les adapter à l'utilisation prévue par le cahier des charges : utilisation en virages courts, en virages grands rayons, en ski de descente, etc...By providing reinforcing members inside the structure of the ski, and by acting on the nature, the shape, and the positioning of these reinforcements, it is possible to modify the characteristics of this ski to adapt them to the use. provided for in the specifications: use in short turns, long radius turns, downhill skiing, etc.

Le document FR-A-2.611.517 décrit un ski dit à "structure en caisson" qui est muni de renforts constitués par des parois de résistance latérale qui suivent la forme extérieure du ski. Au niveau des chants du ski, l'angle d'inclinaison de ces parois de résistance latérale est alors variable le long du corps du ski. Cette variation d'inclinaison entraîne une variation de résistance qui est par suite tributaire de la forme extérieure du ski.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.

Le document FR-A-2.553.669 montre, dans un ski à noyau injecté, l'utilisation d'un organe de renfort qui est noyé dans la mousse injectée et qui est constitué en un tissu fibreux ajouré. Le positionnement de ce renfort dans le moule est aléatoire. Il est simplement posé sur une base et risque de se déplacer lors de l'injection des composants de la mousse de polyuréthanne, sous l'effet du flux et de l'expansion de cette dernière.The 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.

D'une manière générale, les organes de renfort qui peuvent être noyés dans les skis à noyau injecté sont, dans l'état actuel des connaissances, de différentes sortes :

  • . Ils peuvent être métalliques, et réalisés par exemple en acier ou en alliage d'aluminium. Ils sont alors réalisés sous forme de plaques, de joncs longitudinaux par exemple en forme de cordes à piano, ou de grilles.
  • . Ils peuvent être fibreux, et constitués par exemple de fibres de verre, de carbone, ou d'aramide. Ils sont alors réalisés sous forme de plaques, de joncs, de grilles prépolymérisées, de tissus pré-imprégnés de résine, ou encore de tissus secs.
Generally speaking, the reinforcing members which can be drowned in skis with an injected core are, in the current state of knowledge, of different kinds:
  • . They can be metallic, and made for example from steel or aluminum alloy. They are then produced in the form of plates, longitudinal rods for example in the form of piano strings, or grids.
  • . They can be fibrous, and consist for example of glass fibers, carbon, or aramid. They are then produced in the form of plates, rods, prepolymerized grids, fabrics pre-impregnated with resin, or even dry fabrics.

Un des problèmes spécifiques rencontré dans cette technologie de fabrication de skis à noyau injecté "in situ" est le maintien en position, lors de l'opération d'injection, des éléments internes à la structure.One of the specific problems encountered in this technology for manufacturing skis with an "in situ" injected core is the holding in position, during the injection operation, of the elements internal to the structure.

Très schématiquement, le procédé de fabrication classique consiste à déposer contre les parois du moule les composants qui constituent l'enveloppe du ski (la semelle, les carres, le dessus et les chants), puis à injecter la mousse expansible à l'intérieur de la cavité ainsi formée. On ne peut alors pas vraiment prétendre avoir réalisé un ski performant car il manque, à l'intérieurd'une telle structure, les éléments de mécanisation nécessaires pour répondre aux caractéristiques précitées de résistance et de comportement. Il est pour ceci nécessaire, comme indiqué précédemment, de loger dans ladite cavité des éléments de renfort en quantité suffisante et judicieusement positionnés.Very schematically, 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. We can not really claim to have achieved a high-performance ski because it lacks, inside such a structure, the mechanization elements necessary to meet the aforementioned characteristics of resistance and behavior. It is therefore necessary, as indicated above, to house in said cavity reinforcing elements in sufficient quantity and judiciously positioned.

La précision du positionnement de ce genre de renfort par rapport à la fibre neutre du ski (fibre sur laquelle ne s'exerce aucune déformation lors d'une sollicitation du ski en flexion) est très importante, car une légère différence de la distance d qui sépare le renfort de cette fibre neutre a une grande incidence sur la rigidité en flexion simple du ski.The precision of the positioning of this kind of reinforcement with respect to the neutral fiber of the ski (fiber on which no deformation is exerted when the ski is bent) is very important, because a slight difference in the distance d which separating the reinforcement from this neutral fiber has a great impact on the stiffness in simple bending of the ski.

En effet, si l'on néglige en première approximation la rigidité des faces latérales à la flexion locale, la rigidité D à la flexion d'un ski s'exprime par la formule :

  • D = 1/2.Ef.b.e.d2

ou :
  • . Efest le module de Young du renfort
  • . b est la largeur du renfort
  • . d est la distance du renfort à la fibre neutre du ski
  • . e est l'épaisseur du renfort
Indeed, if we neglect as a first approximation the rigidity of the lateral faces to the local bending, the rigidity D to the bending of a ski is expressed by the formula:
  • D = 1/2 .Ef.bed2

or :
  • . Efest Young's module of reinforcement
  • . b is the width of the reinforcement
  • . d is the distance from the reinforcement to the neutral fiber of the ski
  • . e is the thickness of the reinforcement

On constate finalement que cette rigidité D est une fonction du carré de la distance d qui sépare le renfort de la fibre neutre du ski.We finally note that this rigidity D is a function of the square of the distance d which separates the reinforcement from the neutral fiber of the ski.

Sur une même paire de skis, il est important que les deux skis aient des caractéristiques de flexion identiques. En outre, ces caractéristiques de flexion doivent être les mêmes pour tous les skis d'un même type. Il en résulte finalement que le positionnement des renforts internes doit être précis pour obtenir le résultat souhaité ainsi qu'une bonne reproductibilité de ce résultat.On the same pair of skis, it is important that the two skis have identical bending characteristics. In addition, these flexural characteristics must be the same for all skis of the same type. It finally follows that the positioning of the internal reinforcements must be precise to obtain the desired result as well as a good reproducibility of this result.

La technologie d'injection étant ce qu'elle est, il est en conséquence nécessaire de trouver des artifices pour maintenir, lors de l'injection, le ou les renforts internes précités dans une position précise, en dépit de la poussée due à l'expansion de la mousse de polyuréthanne nécessaire au remplissage homogène de la cavité précitée.As the injection technology is what it is, it is consequently necessary to find devices to maintain, during the injection, the abovementioned internal reinforcement (s) in a precise position, despite the thrust due to the expansion of the polyurethane foam necessary for homogeneous filling of the aforementioned cavity.

C'est pourquoi il a été prévu de noyer dans le noyau en polyuréthanne (ou autre matière synthétique injectable) un tube aplati et ajouré qui est conformé à partir d'un grillage en résine polymérisée d'assez grande rigidité. Ce tube ajouré s'étend alors sur pratiquement toute la longueur du ski, grossièrement entre le talon et la naissance de la spatule. Ce tube est simplement posé dans le moule avant fermeture du couvercle. Son grillage constitutif étant à mailles larges, il n'offre pas d'obstacle au passage du polyuréthanne et ne subit pas de déformation substantielle au cours de l'opération d'injection.This is why it was planned to drown in the polyurethane core (or other injectable synthetic material) a flattened and perforated tube which is shaped from a mesh of polymerized resin as with great rigidity. This perforated tube then extends over practically the entire length of the ski, roughly between the heel and the birth of the tip. This tube is simply placed in the mold before closing the cover. Its constituting mesh being wide mesh, it does not offer any obstacle to the passage of the polyurethane and does not undergo substantial deformation during the injection operation.

Ce tube de renfort ne s'avère cependant pas suffisant pour conférer au ski les qualités optimales de rigidité en flexion et en torsion qui sont généralement souhaitées.This reinforcement tube is however not sufficient to give the ski the optimum qualities of flexural and torsional rigidity which are generally desired.

L'invention vise à remédier à tous ces inconvénients. Elle se rapporte à cet effet à un procédé de fabrication d'un ski à noyau en matière synthétique injectée, ce ski comportant un renfort interne qui est noyé dans la matière synthétique et qui est constitué d'un tissu de fibre de verre ou autre matériau fibreux, ce tissu étant largement ajouré et étant en outre muni d'une armature métallique malléable en fils métalliques espacés qui est apte à permettre une pré-déformation aisée et rémanente de ce tissu afin de lui conférer à l'avance une forme voulue, ce procédé consistant à :

  • - préparer un ensemble composé de plusieurs éléments superposés et préassemblés dont, successivement du haut en bas :
  • . la partie supérieure du ski au moins composée de la plaque constitutive de l'élément éventuellement décoré de protection du ski,
  • . ledit tissu de renfort préformé en tuile et préassemblé par adhésivité à distance de cette partie supérieure grâce à l'interposition de cordons ou pastilles d'un produit pâteux et collant, tel qu'un adhésif "hot melt" ;
  • - poser dans la partie inférieure du moule les éléments inférieurs du ski : typiquement les carres, la semelle, la ou les éventuelles plaques de renfort inférieures, etc... ;
  • - courber, en forme de gouttière renversée, l'ensemble supérieur pour 1 ' encastrer dans cette partie inférieure du moule ;
  • - refermer alors le moule à l'aide de son couvercle à section en U renversé, injecter la matière synthétique, et procéder enfin aux opérations habituelles de refroidissement, d'ouverture du moule, d'extraction, d'ébavurage et de ponçage du ski, etc...
The invention aims to remedy all these drawbacks. To this end, it relates to a method for manufacturing 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 material. fibrous, this fabric being largely perforated and being furthermore provided with a malleable metallic reinforcement in spaced metallic wires which is able to allow an easy and persistent pre-deformation of this fabric in order to give it in advance a desired shape, this process consisting in:
  • - prepare a set composed of several superimposed and preassembled elements including, successively from top to bottom:
  • . the upper part of the ski at least composed of the plate constituting the optionally decorated element for protecting the ski,
  • . said reinforcing fabric preformed into a tile and pre-assembled by adhesiveness at a distance from this upper part thanks to the interposition of cords or pellets of a pasty and sticky product, such as a "hot melt"adhesive;
  • - Place the lower elements of the ski in the lower part of the mold: typically the edges, the sole, or any lower reinforcement plate (s), etc ...;
  • bending, in the form of an inverted gutter, the upper assembly for embedding it in this lower part of the mold;
  • - then close the mold using its inverted U-section cover, inject the synthetic material, and finally proceed to the usual operations of cooling, opening the mold, extracting, deburring and sanding the ski , etc ...

Selon une variante de ce procédé, on pose dans la partie inférieure du moule, et en même temps que lesdits éléments inférieurs du ski, un autre organe de renfort constitué par un tube ajouré et conformé à partir d'un grillage.According to a variant of this method, there is placed in the lower part of the mold, and at the same time as the said lower elements of the ski, another reinforcing member constituted by an openwork tube and shaped from a mesh.

L'invention se rapporte aussi à un ski à noyau en matière synthétique injectée, ce ski comportant un renfort interne qui est noyé dans la matière synthétique et qui est constitué d'un tissu de fibre de verre ou autre matériau fibreux, ce tissu étant largement ajouré et étant en outre muni d'une armature métallique malléable en fils métalliques espacés qui est apte à permettre une pré-déformation aisée et rémanente de ce tissu afin de lui conférer à l'avance une forme voulue, et ce ski étant caractérisé en ce que ce renfort interne est positionné à distance de la face interne de la partie supérieure du ski qui est constituée par au moins la coque supérieure que constitue l'élément extérieur de décor du ski, et en ce que ce renfort interne est séparé de cette même partie supérieure du ski par une plaque de renfort supérieure destinée à favoriser le vissage des fixations et des entretoises qui sont constituées par des cordons ou pastilles d'un produit pâteux et collant, tel qu'un adhésif "hot melt", ces entretoises étant elles aussi noyées dans la matière synthétique.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 in advance a desired shape, and this ski being characterized in that this internal reinforcement is positioned at a distance from 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 in that this internal reinforcement is separated from this same upper part of the ski by an upper reinforcement plate intended to favor the screwing of the bindings and spacers which are constituted by cords or pads of a p pasty and sticky product, such as a "hot melt" adhesive, these spacers also being embedded in the synthetic material.

Préférentiellement, ce renfort en tissu armé a une forme générale de courte gouttière renversée, il a une longueur limitée à quelques dizaines de centimètres, et, étant situé au niveau de la zone de patin, englobe longitudinalement cette zone de patin pour s'étendre de part et d'autre de celle-ci. Si par exemple cette zone de patin s'étend sur environ 500 millimètres selon l'axe longitudinal du ski, le tissu armé est placé sous la plaque de renfort supérieure destinée à favoriser le vissage des fixations, et sa longueur est d'environ 600 à 1200 millimètres de telle sorte qu'il dépasse, dans le sens longitudinal, de part et d'autre de cette zone de patin, c'est-à-dire en fait de cette plaque de renfort supérieure.Preferably, 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.

Avantageusement en outre ce tissu sec armé est choisi d'une largeur suffisante pour que ses deux bords latéraux viennent prendre appui, directement ou indirectement, sur les deux carres latérales respectives du ski. Il vient ainsi constituer, pour les carres, un élément de soutien qui s'oppose à leur enfoncement.Advantageously, moreover, 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.

L'invention sera bien comprise, et ses avantages et caractéristiques ressortiront mieux, lors de la description suivante d'un exemple non limitatif de réalisation, en référence au dessin schématique annexé dans lequel :

  • - Figure 1 est une vue latérale de ce ski, permettant de situer la zone où est placé le renfort en tissu ajouré ;
  • - Figure 2 est une coupe transversale de ce ski, selon II-II de Figure 1 ;
  • - Figure 3 est une vue en plan d'un morceau du tissu armé ;
  • - Figure 4 est une vue éclatée des éléments constitutifs de ce ski, avant préassemblage partiel et mise en place dans le moule d'injection de matière synthétique ;
  • - Figure 5 montre ces mêmes éléments partiellement pré-assemblés et placés dans le moule, avant fermeture du couvercle ;
  • - Figure 6 montre ces mêmes éléments dans le moule, après fermeture du couvercle mais avant injection de la matière synthétique ;
  • - Figure 7 montre la position finale adoptée par tous ces éléments après injection de cette matière synthétique ;
  • - Figure 8 illustre une autre découpe possible pour la plaque de tissu sec, cette découpe permettant la réalisation d'une variante de réalisation de ce ski ;
  • - Figures 9 à 11 sont des vues semblables à Figure 2 et illustrant quelques autres variantes de réalisation de ce ski ; et
  • - Figures 12 et 13 sont des vues en coupe, semblables à Figures 9 à 11, mais réalisées sur les deux skis d'une même paire selon deux autres variantes de réalisation.
The invention will be clearly understood, and its advantages and characteristics will emerge more clearly from the following description of a nonlimiting exemplary embodiment, with reference to the appended schematic drawing in which:
  • - Figure 1 is a side view of this ski, making it possible to locate the area where the openwork fabric reinforcement is placed;
  • - Figure 2 is a cross section of this ski, according to II-II of Figure 1;
  • - Figure 3 is a plan view of a piece of the reinforced fabric;
  • - Figure 4 is an exploded view of the constituent elements of this ski, before partial pre-assembly and installation in the plastic injection mold;
  • - Figure 5 shows these same elements partially pre-assembled and placed in the mold, before closing the cover;
  • - Figure 6 shows these same elements in the mold, after closing the cover but before injecting the synthetic material;
  • - Figure 7 shows the final position adopted by all these elements after injection of this synthetic material;
  • - Figure 8 illustrates another possible cut for the dry fabric plate, this cut allowing the production of an alternative embodiment of this ski;
  • - Figures 9 to 11 are views similar to Figure 2 and illustrating some other alternative embodiments of this ski; and
  • - Figures 12 and 13 are sectional views, similar to Figures 9 to 11, but made on two skis of the same pair according to two other alternative embodiments.

En se reportant aux Figures 1 et 2, il s'agit d'un ski 1 à noyau 2 en mousse de polyuréthanne injectée. Un tel ski est plus épais et moins large au niveau de la zone de patin p, là ou sont posées les fixations, qu'à ses extrémités.Referring to Figures 1 and 2, it is a 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.

Un ski de ce type est, par exemple, composé d'une semelle de glissement 3, de carres latérales métalliques 4,5, d'un noyau 2 en polyuréthanne ou autre matière, et d'une coque extérieure 6, qui est formée d'au moins d'une couche de matière thermoplastique et qui porte le motif décoratif du ski.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.

Dans la zone de patin p, collée sous l'élément de décor 6, est prévue une lame de renfort supérieure 7, en matière rigide telle qu'un composite de fibre de verre et de résine-époxy prépolymérisée, qui est destinée à permettre un vissage solide et aisé des fixations.In the pad area p, glued under the decorative element 6, 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 fixings.

Une lame de renfort inférieure 8 repose pratiquement sur les deux carres latérales 4,5. Cette lame 8 est par exemple en alliage d'aluminium.A lower reinforcing strip 8 rests practically on the two lateral edges 4,5. This blade 8 is for example made of aluminum alloy.

La tenue de ce ski est, de manière connue en soi, déjà améliorée par le fait qu'un long tube aplati et ajouré 9, assez rigide, est noyé dans la mousse de polyuréthanne 2. Ce tube 9 est par exemple fabriqué à partir d'un grillage en résine polymérisée d'assez grande rigidité. Il s'étend pratiquement sur toute la longueur du ski 1, du talon 10 à la naissance 11 de la spatule 12.The holding of 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.

Afin d'améliorer en particulier la résistance de ce ski en flexion latérale ainsi qu'en torsion, un autre élément de renfort 13 est noyé dans le polyuréthanne 2, au niveau de la zone de patin p. Plus précisement, ce renfort supplémentaire 13 englobe longitudinalement cette zone de patin p et est de longueur légèrement supérieure à celle-ci, de sorte qu'il la dépasse de part et d'autre dans le sens longitudinal. Sa longueur L est par exemple de l'ordre de 600 à 1200 millimètres pour une zone de patin p de 500 millimètres de long.In order to improve in particular the resistance of this ski in lateral flexion as well as in torsion, 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.

D'une manière générale, la longueur L de ce renfort supplémentaire 13 est de l'ordre de quelques dizaines de centimètres. Sa forme est celle d'une courte gouttière renversée.Generally, the length L of this additional reinforcement 13 is of the order of a few tens of centimeters. Its shape is that of a short inverted gutter.

Bien que ce ne soit pas absolument obligatoire, ce renfort 13 est choisi d'une largeur suffisante pour que ses deux bords latéraux 14 et 15 puissent venir prendre appui sur les deux carres latérales respectives 4 et 5 du ski 1. De la sorte, ce renfort 13 sert non seulement à améliorer la tenue en flexion latérale et en torsion du ski, mais il sert en outre de solide armature venant maintenir les carres 4 et 5 en s'opposant à leur enfoncement.Although it is not absolutely mandatory, 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 which maintains the edges 4 and 5 by opposing their sinking.

Ce renfort 13 est en tissu sec armé, ce tissu étant actuellement couramment utilisé pour la création de coques étanches, par exemple pour la construction des piscines ainsi que des bateaux de plaisance. Ce tissu sec armé, qui est donc disponible dans le commerce, est représenté à plat sur la Figure 3.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 reinforced dry fabric, which is therefore commercially available, is shown flat in Figure 3.

Il s'agit d'un tissu sec assez ajouré, en fibres de verre dans le cas général, qui est très fortement pourvu en fils de chaîne (longitudinaux) 16 et très faiblement pourvu en fils de trame (transversaux) 17. En outre, et c'est un point essentiel, ce tissu sec est armé en fils de trame métalliques 18, assez largement espacés l'un de l'autre. Cette armature métallique 18 permet de conférer à ce tissu une courbure rémanente, en section transversale. Dans une forme plus élaborée de ce tissu, il est toujours en fils de fibre de verre, mais il comporte des fils plus nobles tel que des fils d'aramide ou des fils de carbone.It 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. In addition, and this is an essential point, 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. In a more elaborate form of this fabric, it is always made of fiberglass yarns, but it has more noble yarns such as aramid yarns or carbon yarns.

Le caractère ajouré du tissu permet le passage de la mousse de polyuréthanne afin de noyer le renfort 13 dans la structure du ski 1, et donc de conférer à la fibre de ce tissu toutes ses qualités mécaniques.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.

Ce renfort 13 est maintenu à distance de la surface inférieure de la coque 6, et plus précisément au niveau de la zone de patin p de la plaque 7, grâce à l'interposition préalable d'entretoises 19,20 qui sont constituées par des cordons longitudinaux en un produit pâteux et collant, tel que de l'adhésif "hot melt".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.

De plus l'armature métallique 18 de ce tissu permet de préformer ce tissu 13 en forme de gouttière.In addition, the metal frame 18 of this fabric makes it possible to preform this fabric 13 in the form of a gutter.

Sur la Figure 4 sont représentés, de manière très partielle, au niveau de la zone de patin, tous les éléments constitutifs du ski avant leur mise en place dans le moule.In Figure 4 are shown, very partially, at the skate area, all the constituent elements of the ski before their introduction into the mold.

On reconnaît sur cette figure, et successivement du haut en bas : l'élément de décor 6 qui est auparavant décoré à plat, la lame supérieure de renfort 7 qui est destinée à favoriser le vissage des fixations, le tissu sec armé 13, le tube plat et ajouré 9, le renfort inférieur 8, les carres latérales 4 et 5, et la semelle de glissement 3.We recognize in this figure, and successively from top to bottom: the decorative element 6 which is previously decorated flat, the upper reinforcement blade 7 which is intended to promote the screwing of the fasteners, the reinforced dry fabric 13, the tube flat and perforated 9, the lower reinforcement 8, the side edges 4 and 5, and the sliding sole 3.

En outre sont prévus, entre la lame de renfort 7 et le tissu sec 13, et de façon à maintenir dans le moule ce tissu sec à distance verticale de cette lame 7, deux cordons 19 et 20 d'une pâte collante et auto- adhésive, de type "hot melt".In addition, two strands 19 and 20 of a sticky, self-adhesive paste are provided between the reinforcing blade 7 and the dry fabric 13, and so as to maintain in the mold this dry fabric at a vertical distance from this blade 7. , of the "hot melt" type.

En se reportant à la Figure 5, la lame 7 est d'abord collée à sa place sous la plaque de décor 6, puis le tissu 13 est conformé en gouttière renversée et est positionné, par interposition des cordons collants 19 et 20, sous la lame 7 et à distance verticale de celle-ci. La semelle 3, les carres 4,5, le renfort 8 et le tube 9, ayant alors été posés comme d'habitude dans le moule 21, le complexe formé par la plaque 6, la lame 7, les cordons 19,20, et le tissu sec 13 est alors encastré comme représenté dans ce moule 21, où il adopte une forme assez éloignée de sa forme définitive.Referring to Figure 5, 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 beads 19 and 20, under the blade 7 and at a vertical distance from the latter. 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 mold 21, where it assumes a shape that is quite far from its final shape.

Le couvercle 22 du moule est alors mis en place comme représenté en Figure 6. A ce stade, les divers éléments, comprimés par ce couvercle 22, prennent là encore une forme approximative, comme représenté sur cette Figure 6.The cover 22 of the mold is then put in place as shown in FIG. 6. At this stage, the various elements, compressed by this cover 22, again take an approximate shape, as shown in this Figure 6.

La mousse de polyuréthanne 2 est alors injectée, passant au travers des éléments ajourés 9 et 13, plaquant la coque contre les parois du moule 21,22, re- positionnant correctement les divers éléments internes du ski pour leur conférer leur forme définitive, tel que représenté en Figure 7.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, such as shown in Figure 7.

Après durcissement puis refroidissement du polyuréthanne, le couvercle 22 est retiré, et le ski peut être sorti du moule et être soumis aux opérations de finition : ébavurage, ponçage, etc...After hardening and then cooling of the polyurethane, the cover 22 is removed, and the ski can be removed from the mold and be subjected to the finishing operations: deburring, sanding, etc.

Comme il va de soi, l'invention n'est pas limitée à l'exemple de réalisation qui vient d'être décrit.It goes without saying that the invention is not limited to the embodiment which has just been described.

C'est ainsi que, dans cet exemple, le tissu 13 est à l'origine découpé selon une forme rectangulaire. Il pourrait en être autrement, et, selon Figure 8, cette forme de découpe pourrait être celle d'un parallèlo- gramme non-rectangulaire : le ski 1 présenterait alors une asymétrie droite-gauche, ce qui peut être avantageux dans certains cas. A noter bien entendu que cette dissymétrie droite-gauche pourrait être conférée au ski en donnant à ce tissu 13 une asymétrie par rapport à l'axe longitudinal médian 33 du ski qui serait due à une toute autre forme que celle d'un parallèlo- gramme non-rectangulaire.Thus, in this example, 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 parallelogram. non-rectangular.

Selon Figure 9, ce ski pourrait ne pas comporter le renfort tubulaire grillagé 9 précité, mais uniquement le renfort 13 qui pourrait alors éventuellement être un peu plus long.According to Figure 9, this ski may not include the tubular mesh reinforcement 9 above, but only the reinforcement 13 which could then possibly be a little longer.

Selon Figure 10, ce même renfort 13 pourrait être conformé pour avoir un ou des plis latéraux 23,24 aptes à renforcer considérablement sa solidité au niveau des faces latérales du ski, ce qui a pour effet de renforcer considérablement la structure en flexion latérale. Ces plis 23,24 sont positionnés sensiblement au niveau de la fibre neutre du ski.According to Figure 10, 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.

Ce même effet de renfort accentué en flexion latérale pourrait aussi être obtenu, selon Figure 11, en conformant le tissu pour créer latéralement un ou des retours 25,26 qui au moins doubleraient en épaisseur chacune des faces latérales de la gouttière 13.This same reinforcement effect accentuated in lateral bending could also be obtained, according to FIG. 11, by shaping the fabric to create laterally one or more returns 25, 26 which at least double in thickness each of the lateral faces of the gutter 13.

Dans un esprit d'économie de coût de fabrication, et compte-tenu du fait que, pour une paire de skis, ce sont essentiellement les carres intérieures qui sont sollicitées en utilisation des skis, il est possible de prévoir, pour le renfort 13 en tissu ajouré et armé, un positionnement asymétrique adoptant une conformation en L couché, selon Figure 12, ce tissu ne comportant alors, pour chaque ski d'une même paire 27,28, qu'une seule face latérale, respectivement 131 et 132, prévue uniquement du côté de la carre intérieure, respectivement 41 et 51.In a spirit of economy of manufacturing cost, and taking into account that, for a pair of skis, it is essentially the inner edges which are requested in use of the skis, it is possible to provide, for the reinforcement 13 in perforated and reinforced fabric, an asymmetrical positioning adopting a L-shaped conformation, according to Figure 12, this fabric then comprising, for each ski of the same pair 27,28, only one side face, respectively 131 and 132, provided only on the inner edge side, 41 and 51 respectively.

De même façon, ces deux renforts 13 peuvent, pour les deux skis 27,28 d'une même paire, posséder, selon Figure 13, chacun un seul retour, respectivement 261 et 251, chacun de ces retours étant identique aux retours 25 et 26 selon Figure 11 et le renfort 13 pouvant par ailleurs conserver une forme de gouttière renversée d'allure asymétrique car plus épaisse sur une de ses faces latérales. D'une façon plus générale, le renfort 13 peut être conformé ou positionné de façon à présenter plus de matière du côté des carres intérieures de chaque ski d'une même paire.Similarly, 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.

Claims (16)

1 - Procédé de fabrication d'un ski (1) à noyau (2) en matière synthétique injectée, ce ski comportant un renfort interne (13) qui est noyé dans la matière synthétique et qui est constitué d'un tissu (16,17) de fibre de verre ou autre matériau fibreux, ce tissu étant largement ajouré et étant en outre muni d'une armature métallique malléable (18) en fils métalliques espacés qui est apte à permettre une pré-déformation aisée et rémanente de ce tissu afin de lui conférer à l'avance une forme voulue, caractérisé en ce qu'il consiste à : - préparer un ensemble composé de plusieurs éléments superposés et préassemblés dont, successivement du haut en bas : . la partie supérieure (6,7) du ski au moins composée de la plaque (6) constitutive de l'élément éventuellement décoré de protection du ski, et . ledit tissu de renfort (13) préformé en tuile et préassemblé par adhésivité à distance de cette partie supérieure (6,7) grâce à l'interposition de cordons (19,20) ou pastilles d'un produit pâteux et collant, tel qu'un adhésif "hot melt" ; - poser dans la partie inférieure (21) du moule les éléments inférieurs du ski : typiquement les carres (4,5), la semelle (3), la ou les éventuelles plaques de renfort inférieures (8), etc... ; - courber, en forme de gouttière renversée, l'ensemble supérieur (6,7,13) pour l'encastrer dans cette partie inférieure (21) du moule ; - refermer alors le moule à l'aide de son couvercle (22) à section en U renversé, injecter la matière synthétique (2), et procéder enfin aux opérations habituelles de refroidissement, d'ouverture du moule, d'extraction, d'ébavurage et de ponçage du ski, etc... 1 - Method for manufacturing a ski (1) with a core (2) of injected synthetic material, this ski comprising an internal reinforcement (13) which is embedded in the synthetic material and which consists of a fabric (16,17 ) of glass fiber or other fibrous material, this fabric being largely perforated and being further provided with a malleable metallic frame (18) of spaced metallic threads which is able to allow an easy and persistent pre-deformation of this fabric in order to give it a desired shape in advance, characterized in that it consists of: - prepare a set composed of several superimposed and preassembled elements including, successively from top to bottom: . the upper part (6,7) of the ski at least composed of the plate (6) constituting the optionally decorated element for protecting the ski, and . said reinforcing fabric (13) preformed into a tile and pre-assembled by adhesiveness at a distance from this upper part (6,7) thanks to the interposition of cords (19,20) or pellets of a pasty and sticky product, such as a "hot melt"adhesive; - Place the lower elements of the ski in the lower part (21) of the mold: typically the edges (4,5), the sole (3), or any lower reinforcement plates (8), etc .; bending, in the form of an inverted gutter, the upper assembly (6, 7, 13) in order to embed it in this lower part (21) of the mold; - then close the mold using its cover (22) with inverted U section, inject the synthetic material (2), and finally proceed to the usual operations of cooling, opening the mold, extracting, deburred age and sanding of the ski, etc ... 2 - Procédé selon la revendication 1, caractérisé en ce que l'on pose dans la partie inférieure (21) du moule, au dessus des éléments inférieurs (4,5,3,8) du ski, un autre organe de renfort constitué par un tube ajouré (9) et conformé à partir d'un grillage.2 - Method according to claim 1, characterized in that one places in the lower part (21) of the mold, above the lower elements (4,5,3,8) of the ski, another reinforcing member constituted by an openwork tube (9) and shaped from a grid. 3 - Ski à noyau (2) en matière synthétique injectée, ce ski comportant un renfort interne (13) qui est noyé dans la matière synthétique et qui est constitué d'un tissu de fibre de verre (16,17) ou autre matériau fibreux, ce tissu étant largement ajouré et étant en outre muni d'une armature métallique malléable en fils métalliques (18) espacés qui est apte à permettre une pré-déformation aisée et rémanente de ce tissu (16,17) afin de lui conférer à l'avance une forme voulue, caractérisé : . en ce que ce renfort interne (13) est positionné à distance de la partie supérieure (6,7) du ski qui est constituée par au moins la coque supérieure (6), . et en ce que ce même renfort interne (13) est séparé de cette même partie supérieure (6,7) du ski par des entretoises qui sont constituées par des cordons (19,20) ou pastilles d'un produit pâteux et collant, tel qu'un adhésif "hot melt", ces entretoises (19,20) étant elles aussi noyées dans la matière synthétique (2). 3 - Core ski (2) of injected synthetic material, this ski comprising an internal reinforcement (13) which is embedded in the synthetic material and which consists of a fiberglass fabric (16,17) or other fibrous material , this fabric being largely openwork and being further provided with a malleable metal frame of spaced metal wires (18) which is capable of allowing easy and persistent pre-deformation of this fabric (16,17) in order to give it to the 'advance a desired shape, characterized: . in that this internal reinforcement (13) is positioned at a distance from the upper part (6,7) of the ski which is constituted by at least the upper shell (6), . and in that this same internal reinforcement (13) is separated from this same upper part (6,7) of the ski by spacers which are constituted by cords (19,20) or pellets of a pasty and sticky product, such than a "hot melt" adhesive, these spacers (19,20) also being embedded in the synthetic material (2). 4 - Ski selon la revendication 3, caractérisé en ce que ce renfort (13) a une forme de courte gouttière renversée.4 - Ski according to claim 3, characterized in that this reinforcement (13) has the shape of a short inverted gutter. 5 - Ski selon la revendication 3 ou la revendication 4, caractérisé en ce que ce renfort (13) est situé au niveau de la zone de patin (p).5 - Ski according to claim 3 or claim 4, characterized in that this reinforcement (13) is located at the level of the skate area (p). 6 - Ski selon l'une des revendications 3 à 5, caractérisé en ce que ce renfort (13) a une longueur limitée à quelques dizaines de centimètres.6 - Ski according to one of claims 3 to 5, characterized in that this reinforcement (13) has a length limited to a few tens of centimeters. 7 - Ski selon l'une des revendications 3 à 6, caractérisé en ce que ce renfort (13) en tissu armé englobe longitudinalement la zone de patin (p) pour s'étendre légèrement de part et d'autre de celle-ci.7 - Ski according to one of claims 3 to 6, characterized in that this reinforcement (13) in reinforced fabric longitudinally encompasses the skid zone (p) to extend slightly on either side thereof. 8 - Ski selon la revendication 7, caractérisé en ce que, cette zone de patin (p) ayant une longueur de l'ordre de 500 millimètres et ce tissu étant placé sous la plaque de renfort supérieure (7), destinée a favoriser le vissage des fixations et à distance verticale de cette dernière, la longueur de ce renfort (13) en tissu armé est de l'ordre de 600 à 1200 millimètres.8 - Ski according to claim 7, characterized in that, this skid zone (p) having a length of the order of 500 millimeters and this fabric being placed under the upper reinforcement plate (7), intended to promote screwing fasteners and at a vertical distance from the latter, the length of this reinforcement (13) in reinforced fabric is of the order of 600 to 1200 millimeters. 9 - Ski selon l'une des revendications 3 à 8, caractérisé en ce que ce renfort en tissu armé (13) est choisi d'une largeur suffisante pour que ses deux bords latéraux (14,15) viennent prendre appui, directement ou indirectement, sur les deux carres latérales respectives (4,5) du ski.9 - Ski according to one of claims 3 to 8, characterized in that this reinforcement in reinforced fabric (13) is chosen to be of sufficient width so that its two lateral edges (14,15) come to bear, directly or indirectly , on the two respective side edges (4,5) of the ski. 10 - Ski selon l'une des revendications 3 à 9, caractérisé en ce que ce renfort en tissu armé (13) a une forme (Figures 8 et 13) qui est asymétrique par rapport à l'axe longitudinal médian (33) du ski.10 - Ski according to one of claims 3 to 9, characterized in that this reinforcement in reinforced fabric (13) has a shape (Figures 8 and 13) which is asymmetrical with respect to the median longitudinal axis (33) of the ski . 11 - Ski selon l'une des revendications 3 à 10, caractérisé en ce que ce tissu de renfort (13) est positionné (Figure 12) de manière asymétrique par rapport à l'axe longitudinal médian du ski.11 - Ski according to one of claims 3 to 10, characterized in that this reinforcing fabric (13) is positioned (Figure 12) asymmetrically relative to the median longitudinal axis of the ski. 12 -Ski selon l'une des revendications 3 à 11, caractérisé en ce que ce renfort (13) est conformé pour avoir un ou plusieurs plis latéraux (24).12 -Ski according to one of claims 3 to 11, characterized in that this reinforcement (13) is shaped to have one or more lateral folds (24). 13 - Ski selon la revendication 12, caractérisé en ce que ce ou ces plis latéraux (24) sont positionnés sensiblement au niveau de la fibre neutre du ski (1).13 - Ski according to claim 12, characterized in that this or these lateral folds (24) are positioned substantially at the neutral fiber of the ski (1). 14 - Ski selon l'une des revendications 3 à 13, caractérisé en ce que ce renfort (13) est conformé pour créer latéralement un ou des retours (25,26) au moins doublant en épaisseur l'une et/ou l'autre des faces latérales de ce renfort (13).14 - Ski according to one of claims 3 to 13, characterized in that this reinforcement (13) is shaped to laterally create one or more returns (25,26) at least doubling in thickness one and / or the other lateral faces of this reinforcement (13). 15 - Ski selon l'une des revendications 10 à 14, caractérisé en ce que ce renfort (13) est conformé ou positionné de façon à présenter plus de matière du côté des carres intérieures (41,51) de chaque ski (27,28) d'une même paire.15 - Ski according to one of claims 10 to 14, characterized in that this reinforcement (13) is shaped or positioned so as to present more material on the side of the inner edges (41,51) of each ski (27,28 ) of the same pair. 16 - Ski selon l'une des revendications 3 à 15, caractérisé en ce qu'il comporte en outre un autre renfort (9) qui est lui aussi noyé dans la matière synthétique (2), qui est constitué par un tube grillagé, et qui est positionné sous ledit renfort (13) en tissu armé.16 - Ski according to one of claims 3 to 15, characterized in that it further comprises another reinforcement (9) which is also embedded in the synthetic material (2), which is constituted by a mesh tube, and which is positioned under said reinforcement (13) in reinforced fabric.
EP94420012A 1993-01-19 1994-01-12 Ski and process of manufacturing a ski with injected core and through-hole internal reinforcement Expired - Lifetime EP0608186B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9300685A FR2700479B1 (en) 1993-01-19 1993-01-19 Process for manufacturing a ski with an injected core and an openwork internal reinforcement, and ski obtained by this process.
FR9300685 1993-01-19

Publications (2)

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

Family

ID=9443316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94420012A Expired - Lifetime EP0608186B1 (en) 1993-01-19 1994-01-12 Ski and process of manufacturing a ski with injected core and through-hole internal reinforcement

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0750925A1 (en) * 1995-02-01 1997-01-02 BLIZZARD Gesellschaft m.b.H. Method of manufacturing a ski

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (en) * 1999-12-22 2004-07-26 Atomic Austria Gmbh BOARD-LIKE SLIDER, ESPECIALLY SKI OR SNOWBOARD
US20030222420A1 (en) * 2002-06-01 2003-12-04 Hadzicki David Herbert Composit sport board
US7537236B2 (en) * 2002-09-24 2009-05-26 Tyrolia Technology Gmbh Sliding board, especially a ski, and method for producing the same
FR2863901A1 (en) * 2003-12-18 2005-06-24 Skis Dynastar Sliding board e.g. downhill skiing, has inner supports having transversal elasticity which permits them to be maintained in buttress between edges of injection mold, and passage zones for material constituting core
AT501312B1 (en) * 2005-02-04 2009-05-15 Hexcel Holding Gmbh METHOD FOR PRODUCING A SLIDING EQUIPMENT AND SLIDING DEVICE
EP1693089B1 (en) * 2005-02-16 2009-01-07 Skis Rossignol Slide board
DE102005054985A1 (en) * 2005-11-16 2007-05-24 Marker Völkl International GmbH Snow gliding board and shell component for a snow sliding board
US20090045605A1 (en) * 2007-08-17 2009-02-19 Pat Keane Snow ski
FR2925344A1 (en) * 2007-12-20 2009-06-26 Dynastar Skis Sa SNOWBOARD BOARD AND GAME OF AT LEAST TWO SUCH SNOWBOARD BOARDS
FR2926735B1 (en) * 2008-01-25 2010-03-26 Salomon Sa ALPINE SKI WITH MEANS OF ADJUSTMENT
US20180229092A1 (en) * 2017-02-13 2018-08-16 Cc3D Llc Composite sporting equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553669A1 (en) * 1983-10-21 1985-04-26 Swallow Ski Kk PROCESS FOR MANUFACTURING SKI IN INJECTED MATERIAL AND SKI THUS OBTAINED
FR2643564A1 (en) * 1989-02-27 1990-08-31 Salomon Sa CROSS-SECTIONAL SKIING HAVING AT LEAST IN THE CENTRAL PART, SUBSTANTIALLY THE FORM OF AN INSULATED TRAPEZE
EP0448862A2 (en) * 1990-03-27 1991-10-02 Sekisui Fine Chemical Co., Ltd. Particulate spacers and a method for producing the same, and a method for producing a liquid crystal display cell by using the particulate spacers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918731A (en) * 1975-02-05 1975-11-11 Rossignol Sa Cross-country ski
US5056807A (en) * 1987-10-21 1991-10-15 Norton Company Ski construction
FR2654644B1 (en) * 1989-11-22 1992-03-13 Salomon Sa PROCESS FOR MANUFACTURING AN INJECTED SKI, AND SKI STRUCTURE OBTAINED BY THIS PROCESS.
FR2654670A1 (en) * 1989-11-23 1991-05-24 Rossignol Sa PROCESS FOR THE MANUFACTURE IN A SINGLE OPERATION OF A COMPLEX MOLDED STRUCTURE, IN PARTICULAR A SKI, AND A COMPLEX MOLDED STRUCTURE THUS OBTAINED
FR2672810B1 (en) * 1991-02-14 1993-04-23 Salomon Sa ALPINE SKI FOR SLIDING ON SNOW AND ICE.
FR2684012B1 (en) * 1991-11-22 1994-08-05 Rossignol Sa SKI IN SHAPE, NON-RECTANGULAR SECTION.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2553669A1 (en) * 1983-10-21 1985-04-26 Swallow Ski Kk PROCESS FOR MANUFACTURING SKI IN INJECTED MATERIAL AND SKI THUS OBTAINED
FR2643564A1 (en) * 1989-02-27 1990-08-31 Salomon Sa CROSS-SECTIONAL SKIING HAVING AT LEAST IN THE CENTRAL PART, SUBSTANTIALLY THE FORM OF AN INSULATED TRAPEZE
EP0448862A2 (en) * 1990-03-27 1991-10-02 Sekisui Fine Chemical Co., Ltd. Particulate spacers and a method for producing the same, and a method for producing a liquid crystal display cell by using the particulate spacers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0750925A1 (en) * 1995-02-01 1997-01-02 BLIZZARD Gesellschaft m.b.H. Method of manufacturing a ski

Also Published As

Publication number Publication date
DE69400221D1 (en) 1996-07-11
EP0608186B1 (en) 1996-06-05
DE69400221T2 (en) 1996-11-28
US5498016A (en) 1996-03-12
FR2700479B1 (en) 1995-02-24
ATE138818T1 (en) 1996-06-15
FR2700479A1 (en) 1994-07-22

Similar Documents

Publication Publication Date Title
EP0608186B1 (en) Ski and process of manufacturing a ski with injected core and through-hole internal reinforcement
EP0620028B1 (en) Ski with side walls and upper shell
EP0620027B2 (en) Ski with side walls and upper shell
CA1277347C (en) Ski
EP0546309A1 (en) Upper ski surface with variable width
EP0665034B1 (en) Ski with an &#34;in situ&#34; injected core
EP0498963B1 (en) Alpine ski for gliding in snow and ice
FR3058899A1 (en) SLIDING BOARD STRUCTURE ELEMENT
EP0723791B1 (en) Improvement for skis with a shell, provided with side edges supporting this shell
EP1997541B1 (en) Snowboard with lateral edges
FR2507090A1 (en) REINFORCED RACKET FRAME AND METHOD OF MANUFACTURING THE SAME
EP0677306B1 (en) Ski and method for producing the same
FR2670392A1 (en) Winter sports ski consisting of a base and a stiffener
FR2675391A1 (en) Winter sports&#39; ski comprising a stiffener and a base
FR2718650A1 (en) Alpine ski with projection holding bindings above ski
FR2743834A1 (en) MOBILE SHELTER, ESPECIALLY FOR COVERING A POOL
FR2720289A1 (en) Ski with transparent upper surface with decoration underneath
FR2694890A1 (en) Ski with tip or heel made independently - being made in synthetic material moulded on extended reinforcing of ski body with teeth holding material
FR2704442A1 (en) New type of ski
FR2714842A1 (en) Ski with holes for flow of bonding polymer
FR2684015A1 (en) Injected ski
EP3513845A1 (en) Injected glideboard
FR3086868A1 (en) SKI INJECTED HYBRID CORE
FR2689024A1 (en) Ski with stiffening in central compartment - having sheath made of thermo-retractable elastic material round foam core and perforated tubular reinforcing.
BE720701A (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT CH DE LI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JODELET, FRANCOIS

17P Request for examination filed

Effective date: 19950110

17Q First examination report despatched

Effective date: 19950804

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE LI

REF Corresponds to:

Ref document number: 138818

Country of ref document: AT

Date of ref document: 19960615

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: KIRKER & CIE SA

REF Corresponds to:

Ref document number: 69400221

Country of ref document: DE

Date of ref document: 19960711

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19990422

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000131

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20031216

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040109

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050112

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050802