EP3513845A1 - Injected glideboard - Google Patents
Injected glideboard Download PDFInfo
- Publication number
- EP3513845A1 EP3513845A1 EP19150269.9A EP19150269A EP3513845A1 EP 3513845 A1 EP3513845 A1 EP 3513845A1 EP 19150269 A EP19150269 A EP 19150269A EP 3513845 A1 EP3513845 A1 EP 3513845A1
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- EP
- European Patent Office
- Prior art keywords
- incorporated
- assembly
- core
- board according
- gliding board
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- 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.)
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Classifications
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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
- A63C5/003—Structure, covering or decoration of the upper ski surface
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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
- A63C5/006—Appearance of the ski-tip, the rear end or the upper ski-edge
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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
- A63C5/126—Structure of the core
Definitions
- the invention relates to the field of snow sports, including snow sports on snow, such as skiing or surfing, but also water sports on water. It relates more specifically to a board structure including a core made by injection techniques in situ, that is to say in which the core is created during the molding operation generating the assembly of all elements components of the board.
- Gliding boards, and snow sliding boards in particular are formed by forming structures that combine layers of mechanical reinforcements away from a neutral fiber via a core.
- a board for gliding on snow has a lower assembly, comprising a gliding soleplate, associated with a mechanical reinforcing layer, which may be metallic or composite, and which extends over all or part of the length of the board .
- the board also includes an upper assembly which likewise includes one or more layers of mechanical reinforcements, and most often an outer layer of decoration and protection.
- the core may be a prefabricated piece, typically based on wood or polymeric materials, which is placed in the mold above the lower assembly, before being covered by the upper assembly to proceed molding.
- An example is given by the document EP 3,028,749 .
- Another technique consists in producing the core in situ, that is to say by injecting an expandable material when the mold is already closed, and contains the lower and upper sets.
- an expandable material typically based on polyurethane
- polyurethane is formed by the polymerization reaction of chemical components, typically based on alcohols and isocyanates, which react together after being introduced into the mold. , between the upper and lower sets.
- the reaction of these two components being expansive and exothermic, the core is formed between the reinforcements by plating the lower and upper assemblies against the corresponding areas of the mold. This foam thus ensures the bonding of the different elements together.
- the problem is solved by the invention by proposing a particular positioning of inserts or parts incorporated in an injected structure.
- this board is characterized in that it also comprises at least one incorporated part.
- This piece has its lower and upper faces coming into contact with the respectively lower and upper sets, and the entirety of the rest of the surface of this incorporated part is in contact with the material forming the core.
- the invention consists in producing a board by injection, incorporating an insert which is held tight between the lower assembly and the upper assembly, and without any other contact with fixed elements of the structure, especially the side edges, or another element that would itself be fixed relative to the mold.
- the gliding board comprises an integral part, whose entire lateral periphery is in contact with the core so that this incorporated element forms an island isolated inside the core, and opening on the upper faces. and lower of the latter.
- the part incorporated may be made of a translucent or transparent material, and may advantageously be located in an area where the upper or lower assembly is translucent or transparent.
- the embedded part is positioned so that it is aligned with areas of the upper assembly and / or the soleplate, which allows for transmission of light from one face to the other ski. It follows an original aesthetic effect.
- this incorporated part may be made of a material chosen from thermoplastic polyurethane (TPU), acrylonitrile butadiene styrene (ABS), polycarbonate, these materials being taken alone or optionally mixed.
- TPU thermoplastic polyurethane
- ABS acrylonitrile butadiene styrene
- polycarbonate these materials being taken alone or optionally mixed.
- the positioning of the part incorporated inside the mold before injection can be done in different ways.
- the incorporated part may come into contact with the upper or lower assembly via a layer of adhesive material.
- This adhesive material may be on a layer of glue applied to the appropriate places the upper and lower assemblies, and the incorporated part. It may also be an adhesive film present on the lower or lower assembly, or on the incorporated part.
- this incorporated part may be glued on the upper or lower assembly.
- the upper assembly has transparent or translucent areas, it may be advantageous to position the part incorporated under the upper assembly, aligning it precisely with the transparent or translucent areas of the upper assembly, all before the inserting the upper assembly into the mold.
- the part incorporated in accordance with the invention may be disposed at any point of the board, and in particular at a raised end of the board, so as to benefit from the light transmission through the sole, at the level of the board. spatula or heel of the board.
- the board has a seal present between the lower or upper face of the incorporated part and respectively the lower or upper assembly. In other words, it prevents any infiltration of the material forming the core between the incorporated part and the whole higher or lower, by the presence of this seal disposed on the periphery of the contact zone between the incorporated part and the upper or lower assembly.
- this seal may be an insert, whose shape matches that of the periphery of the lower or upper face of the incorporated part.
- the seal may also form an outgrowth of the incorporated part located on the periphery of the lower or upper face of this incorporated part.
- the incorporated part has a peripheral bead, which ensures an overpressure on the whole lower or higher than its contact, when the mold is closed, thus preventing core material from interfering between the incorporated part and the upper or lower set concerned.
- a ski 1 is made by assembling a lower assembly 2 and an upper assembly 7, defining between them a space filled by the core.
- the lower assembly 2 is composed of a sliding sole 3 on which are placed a reinforcing layer 4, which is bordered by the side edges 5, 6.
- a reinforcing layer 4 which is bordered by the side edges 5, 6.
- the upper assembly 7 is composed of a top decorative layer 8, associated with one or more reinforcing layers 12, represented on the figure 3 .
- the decorative layer may also comprise a protective layer made for example of plastic, transparent or not.
- the upper decorative layer 8 has zones 9, having a certain degree of transparency, thus allowing the user to perceive the lower layers, and to let some of the light pass through the assembly. of the structure of the ski, to give a transparency effect to the board, this in the case where the lower and upper reinforcing layers are also transparent or translucent, which is the case with reinforcements made of fiberglass composite materials.
- the composite reinforcements used for the molding of the ski are glass fibers embedded in an already polymerized resin and are in the form of laminates.
- the reinforcements could be perforated metal layers to let the expansive foam through these openings.
- the upper reinforcements are glued under the decorative layer, while the reinforcements lower are glued on the upper layer of the sole.
- the expansive foam injected ensures the bonding of all the elements of the structure between them, in particular the bonding of the upper assembly with the lower assembly and also with the edges.
- the embodiment of this core conventionally comprises the injection into the interior of this volume of chemical components that react with one another to give an expansive foam and in particular a polyurethane foam, which presses the lower assembly 2 and the assembly together. upper 7 against the walls of the mold.
- This injection is made according to traditional methods, at one or more points of entry inside the mold, allowing these components to flow within the volume defined between the upper and lower sets, until filling of the last.
- this polyurethane foam is generally opaque and does not allow light to pass and does not create vertical transparency zones in an injected ski.
- the structure of the ski comprises, as illustrated in FIG. figure 1 incorporated parts 20, 21, which are interposed between the lower assembly 2, and the upper assembly 7. More specifically, the lower face of these elements 20, 21 rests on the upper face of the lower assembly, which can be the upper face of the highest reinforcing layer or a possible additional layer intended to form an interface, and forming the upper surface of the lower assembly 2.
- the upper face of the elements 20, 21 comes into contact with the lower face of the upper assembly 7, namely the lower face of the lower reinforcement layer of the upper assembly or a possible interface layer.
- these parts 20, 21 are arranged in such a way that they are embedded inside the core, that is to say that the material constituting the core comes into contact with all the lateral faces of these parts 20, 21 .
- the portions of the parts 20, 21 which are facing the nearest songs are separated from the latter by a portion 16, 18 of the core and the parts 20 and 21 are separated from each other by another portion of the core 17.
- the parts 21, 20 thus form islands of a material different from the core, and form a junction between the upper and lower sets.
- the incorporated parts 20, 21 may be in various materials chosen according to the desired properties. Thus, these parts may have a role mainly mechanical reinforcement or anchoring elements mounted on the board, and then be made of rather rigid materials, and metal in particular. We can also look for lightening effects, with very low density materials. Transparency effects can be obtained if the material of the incorporated parts is transparent, as for example with the use of a material based on thermoplastic polyurethane (TPU) or ABS + TPU or a polycarbonate.
- TPU thermoplastic polyurethane
- ABS + TPU polycarbonate
- the material of the parts 20, 21 is transparent or translucent, it may be advantageous for these parts to be placed in line with the zones 9, which are also translucent or transparent, of the decoration layer, so as to allow the light to penetrate inside the structure of the board.
- the gliding sole also has translucent or even transparent zones, as well as glass fiber laminates that are also translucent or even transparent, then the light can pass completely through the thickness of the structure of the board, giving a aesthetically interesting transparency effect.
- the parts 20 and 21 are L-shaped, symmetrical with respect to each other along the longitudinal axis of symmetry of the ski, and are of shorter length than the ski core. But any other shape, of rounded or angular type, may be envisaged for these parts 20, 21. These parts 20, 21 are of constant thickness because they are located in an area of the spatula where the spacing between the lower set and the upper set is constant. However, these incorporated parts could also be of variable thickness and in particular follow the separation curve between the lower and upper sets.
- the parts 20,21 may be in accordance with the part 30.
- the part 30 can be assembled to the lower face of the upper assembly 7, before the introduction of this set into the mold. This assembly can be carried out either by bonding or by the use of an adhesive film enabling the part 30 to be accurately positioned with respect to the transparent zones 9 formed in the upper decorative layer 8.
- the part 30 comes in direct contact with the upper face of the lower assembly, in the absence of bonding.
- the lower face of the part 30 comprises a seal 32, which comes into contact with the lower assembly when the mold is closed, and which is then compressed to prevent penetration of the material of the expanding core, between the piece 30 and the lower assembly 2 during molding.
- This seal creates a zone of overpressure in the vertical direction, on the periphery or around the part 30 to limit and preferably block the passage of the polyurethane foam injected under the incorporated part 30. It should be noted in Indeed, since the pressures observed during molding are high and since the incorporated part rests directly on the lower assembly, it is preferable to avoid any passage of material from the core below the characteristic part 30, in order to to obtain a ski of good quality, without defects, and to preserve the best possible level of transparency for the whole structure, and all the more so since the material commonly used to make the core is a dark and more generally black polyurethane.
- This peripheral seal 32 is thus disposed on the outer contour of the lower face of the piece 30.
- the invention also covers other positioning variants, in which, in particular, the characteristic parts are assembled on the lower assembly before being placed in the mold, and in which the peripheral seal is disposed on the upper face of this mold. same room.
- This characteristic piece is in direct contact with the upper assembly, and is maintained under pressure, to prevent any infiltration of polyurethane foam between the upper face of this part and the lower face of the upper assembly.
- the incorporated parts 20, 21 may conform to the part 40.
- the characteristic part 40 is also glued under the upper assembly 7.
- the periphery of the part 40 has a slight extra thickness 42 which is an integral part of the piece 40, and which forms a seal against the penetration of the core material between the characteristic part and the lower assembly.
- This extra thickness is low and is between 0.1 and 0.4mm.
- the shape of this protrusion 42 can be obtained either directly during the manufacture of the characteristic part by injection, or even by machining thereof.
- this protrusion 42 causes additional support, or even a slight deformation of the reinforcement layers of the lower assembly or a slight deformation in compression of this protrusion, which creates an overpressure zone and thus allows to prevent penetration of the material forming the core during its expansion, under the embedded part 40.
- the invention also covers variants in which this peripheral protrusion is present on the upper face of the characteristic part, which is then glued on the lower assembly.
- the invention allows the production of injected skis whose core incorporates characteristic elements or incorporated parts ensuring a bridging between the upper and lower assemblies, without requiring anchoring relative to the songs of the board, or other intermediate structures fixed relative to the rigid portions of the board, creating in particular a pressure zone around the periphery of at least one of the faces of the characteristic element after closure of the mold and during the molding of the ski.
- the characteristic element is surrounded around all its transverse faces by the core foam. It additionally makes it possible to achieve particularly advantageous transparency effects.
- the elements incorporated into the structure of an injected ski may be in a variable number depending on the application and may be positioned in the area of the lift of the ski spatula, but also in any position between the heel zone and the spatula zone. ski.
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- Injection Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
Planche de glisse injectée, comportant :- un ensemble inférieur (2) comprenant une semelle de glisse (3), et au moins une couche de renfort mécanique (4) ;- un ensemble supérieur (7) comportant au moins une couche de renfort mécanique (12) et une couche de décoration (8) ;- un noyau (14) en un matériau polymérique expansé, venant au contact des ensembles inférieur et supérieur,elle comporte également au moins une pièce incorporée (20, 21) présentant ses faces inférieure et supérieure venant au contact des ensembles respectivement inférieur (2) et supérieur (3), et dont l'intégralité du reste de sa surface est au contact du matériau formant le noyau (14).Injected gliding board, comprising: - a lower assembly (2) comprising a gliding sole (3), and at least one layer of mechanical reinforcement (4); - an upper assembly (7) comprising at least one layer of mechanical reinforcement (12) and a decorative layer (8); - a core (14) made of an expanded polymer material, coming into contact with the lower and upper assemblies, it also comprises at least one incorporated part (20, 21) having its lower faces and upper coming into contact with the lower (2) and upper (3) assemblies respectively, and the entirety of the rest of its surface is in contact with the material forming the core (14).
Description
L'invention se rattache au domaine des sports de glisse, et notamment des sports de glisse sur neige, tels que le ski ou le surf, mais également les sports de glisse sur eau. Elle concerne plus spécifiquement une structure de planches incluant un noyau réalisé par des techniques d'injection in situ, c'est-à-dire dans lesquelles le noyau est créé pendant l'opération de moulage générant l'assemblage de l'ensemble des éléments constitutifs de la planche.The invention relates to the field of snow sports, including snow sports on snow, such as skiing or surfing, but also water sports on water. It relates more specifically to a board structure including a core made by injection techniques in situ, that is to say in which the core is created during the molding operation generating the assembly of all elements components of the board.
Dans la suite de la description, l'invention sera plus spécifiquement décrite en relation avec une application dans le domaine du ski alpin, mais elle pourra bien entendu être déclinée pour la réalisation de planches dédiées à d'autres pratiques.In the following description, the invention will be more specifically described in connection with an application in the field of alpine skiing, but it may of course be declined for the realization of boards dedicated to other practices.
Les planches de glisse, et notamment les planches de glisse sur neige sont réalisées en formant des structures qui combinent des couches de renforts mécaniques éloignés d'une fibre neutre par l'intermédiaire d'un noyau. Plus précisément, une planche de glisse sur neige présente un ensemble inférieur, comportant une semelle de glisse, associée à une couche de renfort mécanique, qui peut être métallique ou composite, et qui s'étend sur tout ou partie de la longueur de la planche. La planche comporte également un ensemble supérieur qui inclut de la même manière une ou plusieurs couches de renforts mécaniques, et le plus souvent une couche extérieure de décoration et de protection. Ces deux ensembles inférieur et supérieur sont séparés par un noyau dont le rôle est d'éloigner les différentes couches de renforts fibreux de la fibre neutre, constitué par le plan horizontal médian du noyau, pour donner à la planche la raideur en flexion appropriée.Gliding boards, and snow sliding boards in particular, are formed by forming structures that combine layers of mechanical reinforcements away from a neutral fiber via a core. More specifically, a board for gliding on snow has a lower assembly, comprising a gliding soleplate, associated with a mechanical reinforcing layer, which may be metallic or composite, and which extends over all or part of the length of the board . The board also includes an upper assembly which likewise includes one or more layers of mechanical reinforcements, and most often an outer layer of decoration and protection. These two lower and upper sets are separated by a core whose role is to move the different layers of fibrous reinforcements from the neutral fiber constituted by the median horizontal plane of the core, to give the board the stiffness in appropriate bending.
Deux techniques principales sont connues pour la réalisation du noyau. Ainsi, le noyau peut être une pièce préfabriquée, typiquement à base de bois ou de matériaux polymériques, qui est mise en place dans le moule au-dessus de l'ensemble inférieur, avant d'être recouvert par l'ensemble supérieur pour procéder au moulage. Un exemple est donné par le document
Dans cette technique dite de planches injectées, une matière expansible, typiquement à base de polyuréthane, se forme par la réaction de polymérisation de composants chimiques, typiquement à base d'alcools et d'isocyanates, qui réagissent ensemble après avoir été introduits dans le moule, entre les ensembles supérieur et inférieur. La réaction de ces deux composants étant expansive et exothermique, le noyau se forme entre les renforts en plaquant les ensembles inférieur et supérieur contre les zones correspondantes du moule. Cette mousse permet ainsi d'assurer le collage des différents éléments entre eux.In this technique known as injected planks, an expandable material, typically based on polyurethane, is formed by the polymerization reaction of chemical components, typically based on alcohols and isocyanates, which react together after being introduced into the mold. , between the upper and lower sets. The reaction of these two components being expansive and exothermic, the core is formed between the reinforcements by plating the lower and upper assemblies against the corresponding areas of the mold. This foam thus ensures the bonding of the different elements together.
On conçoit que la progression des matériaux destinés à former la couche du noyau, dans l'espace compris entre les ensembles supérieur et inférieur est un phénomène délicat à maîtriser. En effet, compte tenu de la longueur d'une planche de glisse, en particulier d'un ski, la progression de ce matériau en cours de réaction chimique dans un espace confiné nécessite une forte pression d'insertion. Ceci est d'autant plus vrai lorsque l'ensemble supérieur n'est pas totalement plaqué contre la paroi du couvercle du moule, et qu'il peut venir perturber l'avancée du matériau en cours d'injection. De la même manière, dans le cas où les couches de renfort, notamment au niveau de l'ensemble inférieur, n'occupent pas toute la largeur de ce dernier, la progression du matériau destiné à former un noyau peut provoquer certains déplacements de ces couches de renfort qui sont préjudiciables aux propriétés mécaniques ou même à l'intégrité de la planche finalement obtenue. Ainsi, tous les éléments de la structure interne de la planche doivent être maintenus par rapport au moule pour qu'ils ne bougent pas lors de l'injection de la matière expansible, qui est par exemple une mousse de polyuréthane.It is conceivable that the progression of materials intended to form the core layer in the space between the upper and lower sets is a delicate phenomenon to master. Indeed, given the length of a gliding board, in particular a ski, the progression of this material during chemical reaction in a confined space requires a high insertion pressure. This is even more true when the upper assembly is not fully pressed against the wall of the mold cover, and it may come to disrupt the advance of the material during injection. In the same way, in the case where the reinforcement layers, especially at the level of the lower assembly, do not occupy the entire width of the latter, the progression of the material intended to form a core may cause certain displacements of these layers. reinforcement which are detrimental to the mechanical properties or even the integrity of the board finally obtained. Thus, all the elements of the internal structure of the board must be held relative to the mold so that they do not move during the injection of the expandable material, which is for example a polyurethane foam.
Ainsi, on a décrit dans le document
On conçoit donc que l'incorporation d'inserts ou de pièces incorporées localisés dans la structure d'un ski dont le noyau est réalisé par injection oblige à employer des éléments additionnels de telle sorte que ces inserts ou analogues sont maintenus transversalement, longitudinalement et verticalement, pour résister aux efforts exercés lors de la progression et de l'expansion du matériau destiné à former le noyau de la planche et assurer ainsi leur bon positionnement à l'intérieur de la planche.It is therefore conceivable that the incorporation of inserts or embedded parts located in the structure of a ski whose core is made by injection requires the use of additional elements so that these inserts or the like are maintained transversely, longitudinally and vertically. , to resist the forces exerted during the progression and expansion of the material intended to form the core of the board and thus ensure their proper positioning inside the board.
Le problème est résolu par l'invention en proposant un positionnement particulier d'inserts ou de pièces incorporées dans une structure injectée.The problem is solved by the invention by proposing a particular positioning of inserts or parts incorporated in an injected structure.
L'invention concerne donc une planche de glisse injectée, comprenant :
- un ensemble inférieur comportant une semelle de glisse et au moins une couche de renfort mécanique ;
- un ensemble supérieur comportant au moins une couche de renfort mécanique et une couche de décoration;
- un noyau en un matériau polymérique expansé, venant au contact des ensembles inférieur et supérieur.
- a lower assembly comprising a gliding sole and at least one mechanical reinforcing layer;
- an upper assembly comprising at least one mechanical reinforcing layer and a decorative layer;
- a core of expanded polymeric material contacting the lower and upper assemblies.
Conformément à l'invention, cette planche se caractérise en ce qu'elle comporte également au moins une pièce incorporée. Cette pièce présente ses faces inférieure et supérieure venant au contact des ensembles respectivement inférieur et supérieur, et l'intégralité du reste de la surface de cette pièce incorporée est au contact du matériau formant le noyau.According to the invention, this board is characterized in that it also comprises at least one incorporated part. This piece has its lower and upper faces coming into contact with the respectively lower and upper sets, and the entirety of the rest of the surface of this incorporated part is in contact with the material forming the core.
Autrement dit, l'invention consiste à réaliser une planche par injection, en incorporant un insert qui est maintenu en étant serré entre l'ensemble inférieur et l'ensemble supérieur, et sans aucun autre contact avec des éléments fixes de la structure, notamment les chants latéraux, ou un autre élément qui serait lui-même maintenu fixe par rapport au moule.In other words, the invention consists in producing a board by injection, incorporating an insert which is held tight between the lower assembly and the upper assembly, and without any other contact with fixed elements of the structure, especially the side edges, or another element that would itself be fixed relative to the mold.
En d'autres termes, la planche de glisse comporte une pièce incorporée, dont l'intégralité du pourtour latéral est au contact du noyau de sorte que cet élément incorporé forme un îlot isolé à l'intérieur du noyau, et débouchant sur les faces supérieure et inférieure de ce dernier.In other words, the gliding board comprises an integral part, whose entire lateral periphery is in contact with the core so that this incorporated element forms an island isolated inside the core, and opening on the upper faces. and lower of the latter.
Avantageusement en pratique, la pièce incorporée peut-être en un matériau translucide ou transparent, et être avantageusement localisée dans une zone où l'ensemble supérieur ou inférieur sont translucides ou transparents. En d'autres termes, la pièce incorporée est positionnée de telle sorte qu'elle est alignée avec des zones de l'ensemble supérieur et/ou de la semelle, ce qui permet une transmission de la lumière d'une face à l'autre du ski. Il s'ensuit un effet esthétique original.Advantageously in practice, the part incorporated may be made of a translucent or transparent material, and may advantageously be located in an area where the upper or lower assembly is translucent or transparent. In other words, the embedded part is positioned so that it is aligned with areas of the upper assembly and / or the soleplate, which allows for transmission of light from one face to the other ski. It follows an original aesthetic effect.
En pratique, cette pièce incorporée peut être réalisée en un matériau choisi parmi le polyuréthane thermoplastique (TPU), l'acrylonitrile butadiène styrène (ABS), le polycarbonate, ces matériaux étant pris seuls ou éventuellement en mélange.In practice, this incorporated part may be made of a material chosen from thermoplastic polyurethane (TPU), acrylonitrile butadiene styrene (ABS), polycarbonate, these materials being taken alone or optionally mixed.
Le positionnement de la pièce incorporée à l'intérieur du moule avant injection peut se faire de différentes manières.The positioning of the part incorporated inside the mold before injection can be done in different ways.
Ainsi, la pièce incorporée peut venir au contact de l'ensemble supérieur ou inférieur par l'intermédiaire d'une couche de matériau adhésif. Ce matériau adhésif peut-être sur une couche de colle appliquée aux endroits appropriés les ensembles supérieur et inférieur, et de la pièce incorporée. Il peut également s'agir d'un film adhésif présent sur l'ensemble inférieur ou inférieur, ou bien encore sur la pièce incorporée.Thus, the incorporated part may come into contact with the upper or lower assembly via a layer of adhesive material. This adhesive material may be on a layer of glue applied to the appropriate places the upper and lower assemblies, and the incorporated part. It may also be an adhesive film present on the lower or lower assembly, or on the incorporated part.
Selon le mode opératoire, cette pièce incorporée peut-être collée sur l'ensemble supérieur ou inférieur. Ainsi, lorsque l'ensemble supérieur présente des zones transparentes ou translucides, il peut être avantageux de positionner la pièce incorporée sous l'ensemble supérieur, en l'alignant précisément avec les zones transparentes ou translucides de l'ensemble supérieur, le tout avant l'insertion de l'ensemble supérieur dans le moule.Depending on the procedure, this incorporated part may be glued on the upper or lower assembly. Thus, when the upper assembly has transparent or translucent areas, it may be advantageous to position the part incorporated under the upper assembly, aligning it precisely with the transparent or translucent areas of the upper assembly, all before the inserting the upper assembly into the mold.
Dans un autre cas de figure, il peut être intéressant de positionner la pièce incorporée sur l'ensemble inférieur, avant de déposer l'ensemble supérieur est de refermer le moule.In another case, it may be advantageous to position the incorporated part on the lower assembly, before removing the upper assembly is to close the mold.
En pratique, la pièce incorporée conformément à l'invention peut être disposée à tout endroit de la planche, et notamment au niveau d'une extrémité relevée de la planche, de manière à bénéficier de la transmission lumineuse au travers de la semelle, au niveau de la spatule ou du talon de la planche.In practice, the part incorporated in accordance with the invention may be disposed at any point of the board, and in particular at a raised end of the board, so as to benefit from the light transmission through the sole, at the level of the board. spatula or heel of the board.
Selon un autre aspect de l'invention, il est possible que la planche comporte un joint présent entre la face inférieure ou supérieure de la pièce incorporée et respectivement l'ensemble inférieur ou supérieur. Autrement dit, on évite toute infiltration du matériau formant le noyau entre la pièce incorporée et l'ensemble supérieur ou inférieur, par la présence de ce joint disposé sur la périphérie de la zone de contact entre la pièce incorporée et l'ensemble supérieur ou inférieur.According to another aspect of the invention, it is possible that the board has a seal present between the lower or upper face of the incorporated part and respectively the lower or upper assembly. In other words, it prevents any infiltration of the material forming the core between the incorporated part and the whole higher or lower, by the presence of this seal disposed on the periphery of the contact zone between the incorporated part and the upper or lower assembly.
En pratique, ce joint peut être une pièce rapportée, dont la forme épouse celle de la périphérie de la face inférieure ou supérieure de la pièce incorporée.In practice, this seal may be an insert, whose shape matches that of the periphery of the lower or upper face of the incorporated part.
En pratique, le joint peut également former une excroissance de la pièce incorporée localisée sur la périphérie de la face inférieure ou supérieure de cette pièce incorporée. En d'autres termes, la pièce incorporée présente un bourrelet périphérique, qui assure une surpression sur l'ensemble inférieur ou supérieur à son contact, lorsque le moule est fermé, prévenant ainsi que du matériau du noyau s'immisce entre la pièce incorporée et l'ensemble supérieur ou inférieur concerné.In practice, the seal may also form an outgrowth of the incorporated part located on the periphery of the lower or upper face of this incorporated part. In other words, the incorporated part has a peripheral bead, which ensures an overpressure on the whole lower or higher than its contact, when the mold is closed, thus preventing core material from interfering between the incorporated part and the upper or lower set concerned.
La manière de réaliser l'invention, ainsi que les avantages qui en découlent, ressortiront bien de la description des modes de réalisation qui suivent, à l'appui des figures annexées dans lesquelles :
- La
figure 1 est une vue en perspective sommaire montrant au niveau de la spatule d'un ski, les différents éléments assemblés avant le moulage en vue de la réalisation du noyau du ski. - La
figure 2 est une vue de dessus d'un ski obtenu après assemblage et moulage des éléments de lafigure 1 . - Les
figures 3 et 4 sont des vues en coupe selon les plans respectivement III-III', et IV-IV'. - Les
figures 5 sont des vues en coupe longitudinales de deux variantes de réalisation d'un ensemble supérieur de ski, montré avant assemblage en vue du moulage.et 6
- The
figure 1 is a summary perspective view showing at the spatula of a ski, the various elements assembled before molding for the realization of the core of the ski. - The
figure 2 is a top view of a ski obtained after assembly and molding of the elements of thefigure 1 . - The
Figures 3 and 4 are sectional views along the respective plans III-III ', and IV-IV'. - The
Figures 5 and 6 are longitudinal sectional views of two embodiments of an upper set of ski, shown before assembly for molding.
Comme illustré à la
Dans la mesure où l'invention concerne des planches de glisse dont le noyau est réalisé par injection in-situ lors du moulage, ce noyau n'apparaît pas à la
Plus précisément, dans la forme illustrée, l'ensemble inférieur 2 est composé d'une semelle de glisse 3 sur laquelle sont mises en place une couche de renfort 4, qui est bordée des carres latérales 5, 6. Bien entendu, la nature et même le nombre de couches de renfort peuvent être déclinés en fonction des propriétés mécaniques souhaitées de la planche, sans impact direct sur l'invention.More specifically, in the illustrated embodiment, the lower assembly 2 is composed of a sliding sole 3 on which are placed a reinforcing
Parallèlement, l'ensemble supérieur 7 est composé d'une couche supérieure de décoration 8, associé à une ou plusieurs couches de renfort 12, représentées sur la
Les renforts composites utilisés pour le moulage du ski sont des fibres de verre noyées dans une résine déjà polymérisée et sont à l'état de stratifiés. Dans une variante, les renforts pourraient être des couches métalliques ajourées pour laisser passer la mousse expansive à travers ces ouvertures. Avant le moulage du ski, les renforts supérieurs sont collés sous la couche de décoration, tandis que les renforts inférieurs sont collés sur la couche supérieure de la semelle. La mousse expansive injectée assure le collage de tous les éléments de la structure entre eux, en particulier le collage de l'ensemble supérieur avec l'ensemble inférieur et également avec les carres.The composite reinforcements used for the molding of the ski are glass fibers embedded in an already polymerized resin and are in the form of laminates. Alternatively, the reinforcements could be perforated metal layers to let the expansive foam through these openings. Before the molding of the ski, the upper reinforcements are glued under the decorative layer, while the reinforcements lower are glued on the upper layer of the sole. The expansive foam injected ensures the bonding of all the elements of the structure between them, in particular the bonding of the upper assembly with the lower assembly and also with the edges.
Entre l'ensemble inférieur 2 et l'ensemble supérieur 7, se définit un volume qui sera empli par le noyau après les opérations de moulage. La réalisation de ce noyau comprend de manière classique l'injection à l'intérieur de ce volume de composants chimiques réagissant entre eux pour donner une mousse expansive et en particulier une mousse de polyuréthane, qui vient plaquer l'ensemble inférieur 2 et l'ensemble supérieur 7 contre les parois du moule. Cette injection se fait selon les méthodes traditionnelles, au niveau de un ou plusieurs points d'entrée à l'intérieur du moule, permettant à ces composants de fluer à l'intérieur du volume défini entre les ensembles supérieur et inférieur, jusqu'à comblement de ce dernier. Par ailleurs, cette mousse de polyuréthane est en général opaque et ne laisse pas passer la lumière et ne permet pas de créer des zones de transparences verticales dans un ski injecté.Between the lower assembly 2 and the
Aussi, conformément à l'invention, la structure du ski comporte, comme illustré à la
Parallèlement, la face supérieure des éléments 20, 21 vient au contact de la face inférieure de l'ensemble supérieur 7, à savoir la face inférieure de la couche de renfort la plus basse de l'ensemble supérieur ou une éventuelle couche d'interface. Selon un aspect avantageux de l'invention, et comme illustré aux
Les pièces incorporées 20, 21 peut être en divers matériaux choisis en fonction des propriétés recherchées. Ainsi, ces pièces peuvent avoir un rôle principalement de renfort mécanique, ou d'ancrage d'éléments montés sur la planche, et être alors réalisées en matériaux plutôt rigides, et en métal en particulier. On peut également rechercher des effets d'allégement, avec des matériaux très peu denses. Des effets de transparence peuvent être obtenus si le matériau des pièces incorporées est transparent, comme par exemple avec l'utilisation d'un matériau à base de polyuréthanne thermoplastique (TPU) ou ABS+TPU ou encore d'un polycarbonate.The incorporated
Ainsi, dans le cas où le matériau des pièces 20, 21 est transparent ou translucide, il peut être avantageux que ces pièces soient disposées à l'aplomb des zones 9, également translucides ou transparentes de la couche de décoration, de manière à permettre à la lumière de pénétrer à l'intérieur de la structure de la planche. Ainsi, dans le cas avantageux où la semelle de glisse présente également des zones translucides voire transparentes, ainsi que des stratifiés en fibres de verre également translucides voire transparents, alors la lumière peut traverser intégralement l'épaisseur de la structure de la planche, donnant un effet de transparence intéressant esthétiquement.Thus, in the case where the material of the
Dans la forme illustrée, les pièces 20 et 21 sont en forme de L, symétriques l'une par rapport à l'autre selon l'axe de symétrie longitudinal du ski, et sont de longueur inférieure à celle du noyau du ski. Mais tout autre forme, de type arrondie ou anguleuse, peut être envisagée pour ces pièces 20, 21. Ces pièces 20, 21 sont d'épaisseur constante car elles sont situées dans une zone de la spatule où l'écartement entre l'ensemble inférieur et l'ensemble supérieur est constant. Cependant, ces pièces incorporées pourraient également être d'épaisseur variable et en particulier suivre la courbe d'écartement entre les ensembles inférieur et supérieur.In the form shown, the
En pratique, la mise en place des pièces incorporées 20, 21 peut être réalisée de différentes manières.In practice, the placing of the incorporated
Ainsi, comme illustré à la
Bien entendu, l'invention couvre également d'autres variantes de positionnement, dans lesquelles notamment les pièces caractéristiques sont assemblées sur l'ensemble inférieur avant mise en place dans le moule, et dans lequel le joint périphérique est disposé sur la face supérieure de cette même pièce. Cette pièce caractéristique est au contact direct de l'ensemble supérieur, et est maintenue sous pression, pour empêcher toute infiltration de mousse de polyuréthanne entre la face supérieure de cette pièce et la face inférieure de l'ensemble supérieur.Of course, the invention also covers other positioning variants, in which, in particular, the characteristic parts are assembled on the lower assembly before being placed in the mold, and in which the peripheral seal is disposed on the upper face of this mold. same room. This characteristic piece is in direct contact with the upper assembly, and is maintained under pressure, to prevent any infiltration of polyurethane foam between the upper face of this part and the lower face of the upper assembly.
Dans une autre variante illustrée à la
Bien entendu, l'invention couvre également les variantes dans lesquelles cette excroissance périphérique est présente sur la face supérieure de la pièce caractéristique, qui est alors collée sur l'ensemble inférieur.Of course, the invention also covers variants in which this peripheral protrusion is present on the upper face of the characteristic part, which is then glued on the lower assembly.
Il ressort de ce qui précède que l'invention permet la réalisation de skis injectés dont le noyau intègre des éléments caractéristiques ou pièces incorporées assurant un pontage entre les ensembles supérieur et inférieur, sans nécessiter d'ancrage par rapport aux chants de la planche, ou à d'autres structures intermédiaires fixes par rapport aux portions rigides de la planche, en créant en particulier une zone de surpression sur le pourtour d'au moins une des faces de l'élément caractéristique après fermeture du moule et pendant le moulage du ski. Ainsi, l'élément caractéristique est entouré autour de toutes ses faces transversales par la mousse du noyau. Elle permet complémentairement de réaliser des effets de transparence particulièrement avantageux.It follows from the foregoing that the invention allows the production of injected skis whose core incorporates characteristic elements or incorporated parts ensuring a bridging between the upper and lower assemblies, without requiring anchoring relative to the songs of the board, or other intermediate structures fixed relative to the rigid portions of the board, creating in particular a pressure zone around the periphery of at least one of the faces of the characteristic element after closure of the mold and during the molding of the ski. Thus, the characteristic element is surrounded around all its transverse faces by the core foam. It additionally makes it possible to achieve particularly advantageous transparency effects.
Les éléments incorporés dans la structure d'un ski injecté peuvent être en nombre variable en fonction de l'application et peuvent être positionnés dans la zone du relevé de la spatule du ski, mais également en toute position entre la zone talon et la zone spatule du ski.The elements incorporated into the structure of an injected ski may be in a variable number depending on the application and may be positioned in the area of the lift of the ski spatula, but also in any position between the heel zone and the spatula zone. ski.
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1850425A FR3077006B1 (en) | 2018-01-19 | 2018-01-19 | TRANSPARENT INJECTED SKI |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3513845A1 true EP3513845A1 (en) | 2019-07-24 |
Family
ID=62143334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19150269.9A Withdrawn EP3513845A1 (en) | 2018-01-19 | 2019-01-03 | Injected glideboard |
Country Status (2)
Country | Link |
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EP (1) | EP3513845A1 (en) |
FR (1) | FR3077006B1 (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0300403A1 (en) | 1987-07-20 | 1989-01-25 | Giacomini S.p.A. | Profiled sealing gasket for stopcocks with ball valves |
FR2696126A1 (en) | 1992-09-29 | 1994-04-01 | Rossignol Sa | Reinforcement securing during moulding of skis - user retaining piece, holding reinforcement, which contains magnets attracted to magnets in lower mould half, below ski sole plate |
FR2725910A3 (en) * | 1994-10-20 | 1996-04-26 | Kaestle Ag | Snow board with hollow sections under shell |
EP1504796A1 (en) | 2003-08-04 | 2005-02-09 | Skis Rossignol S.A. | Fabrication method for a board for snow sports with lateral reinforced elements |
EP2384964A1 (en) * | 2010-05-07 | 2011-11-09 | Salomon S.A.S. | Snowboard or surfboard |
EP3028749A1 (en) | 2014-12-02 | 2016-06-08 | Skis Rossignol | Gliding board in which the core includes a highly flexible element |
FR3046732A1 (en) * | 2016-01-15 | 2017-07-21 | Rossignol Sa | SNOWBOARD BOARD ON SNOW |
-
2018
- 2018-01-19 FR FR1850425A patent/FR3077006B1/en active Active
-
2019
- 2019-01-03 EP EP19150269.9A patent/EP3513845A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0300403A1 (en) | 1987-07-20 | 1989-01-25 | Giacomini S.p.A. | Profiled sealing gasket for stopcocks with ball valves |
FR2696126A1 (en) | 1992-09-29 | 1994-04-01 | Rossignol Sa | Reinforcement securing during moulding of skis - user retaining piece, holding reinforcement, which contains magnets attracted to magnets in lower mould half, below ski sole plate |
FR2725910A3 (en) * | 1994-10-20 | 1996-04-26 | Kaestle Ag | Snow board with hollow sections under shell |
EP1504796A1 (en) | 2003-08-04 | 2005-02-09 | Skis Rossignol S.A. | Fabrication method for a board for snow sports with lateral reinforced elements |
EP2384964A1 (en) * | 2010-05-07 | 2011-11-09 | Salomon S.A.S. | Snowboard or surfboard |
EP3028749A1 (en) | 2014-12-02 | 2016-06-08 | Skis Rossignol | Gliding board in which the core includes a highly flexible element |
FR3046732A1 (en) * | 2016-01-15 | 2017-07-21 | Rossignol Sa | SNOWBOARD BOARD ON SNOW |
Also Published As
Publication number | Publication date |
---|---|
FR3077006A1 (en) | 2019-07-26 |
FR3077006B1 (en) | 2020-01-03 |
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