EP4091683A1 - Kern für gleitbrett und entsprechendes gleitbrett - Google Patents

Kern für gleitbrett und entsprechendes gleitbrett Download PDF

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Publication number
EP4091683A1
EP4091683A1 EP22172596.3A EP22172596A EP4091683A1 EP 4091683 A1 EP4091683 A1 EP 4091683A1 EP 22172596 A EP22172596 A EP 22172596A EP 4091683 A1 EP4091683 A1 EP 4091683A1
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EP
European Patent Office
Prior art keywords
type
core
thickness
elements
layers
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.)
Pending
Application number
EP22172596.3A
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English (en)
French (fr)
Inventor
Yann Malroux
Emanuele CASSIBBA
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 EP4091683A1 publication Critical patent/EP4091683A1/de
Pending legal-status Critical Current

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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
    • 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
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices

Definitions

  • the invention relates to the field of gliding boards, in particular boards for gliding on snow.
  • a gliding board comprises a core extending over almost the entire length of the board, and whose role is essentially to give thickness to the ski, by separating mechanical reinforcements and keeping them at a distance neutral fiber.
  • the cores can be formed by injection, in the mold of the board, or in a specific mold to obtain the core, of components which react together to form a foam. Another technique consists of cutting and machining the core prior to molding. The invention relates more precisely to this family of cores.
  • These cores can thus be made of various materials, such as, for example, a polymeric foam or, more frequently, wood.
  • the wood-based cores of the prior art are formed from a set of wooden strips oriented along a longitudinal axis of the board and glued together.
  • the plate obtained is called laminated/glued plate.
  • the document FR843973 describes a ski consisting of a wooden core formed by wooden blades oriented along a longitudinal axis of the board and glued together. These wooden slats are formed from a solid wood which has wood fibers oriented along the axis of the thickness of the board.
  • the board also has a thinner bottom layer and top layer whose wood fibers are oriented longitudinally, these layers acting as reinforcements, sole and upper top.
  • Such a core provides the board with good resistance to compression.
  • the board is not suitable to withstand significant twisting or bending.
  • the document DE 295 02 290 describes a snowboard integrating a core consisting of a superposition of layers of wood whose wood fibers are oriented, in turn, along the longitudinal axis of the snowboard, along the transverse axis, at 90°, and along the diagonals, approximately at plus or minus 45°.
  • Such a stack makes it possible to standardize the behavior of the board on snow or on water, since the wood fibers have several preferred orientations, angularly distributed.
  • the manufacture of such a snowboard requires particularly meticulous and delicate manipulations, which increase the cost of manufacture.
  • the technical problem which the invention sets out to solve is therefore to develop a core giving a gliding board good mechanical properties in compression, in bending and in torsion.
  • the invention proposes to develop a core for a gliding board, comprising an upper face and a lower face intended to come opposite the gliding sole, the lower face defining a plane comprising a longitudinal axis oriented along the length of the board and a transverse axis, oriented along the width of the board, the core having a thickness measured in a direction perpendicular to said lower face of the core.
  • the element of the first type which comprises an alternation of wood fibers oriented along the transverse axis and along the longitudinal axis of the core, makes it possible to provide resistance to torsion and to bending.
  • the element of the second type which comprises an alternation of wood fibers oriented in the direction of the thickness and along the longitudinal axis of the core, makes it possible to provide resistance to compression and to bending.
  • the association of these two elements within the core makes it possible to obtain good resistance in the three directions of space, that is to say, in the direction of thickness, length and the core width.
  • the mechanical resistance of the core is thus improved, both in compression, in bending and in torsion.
  • the middle of the shoe which designates a mark on the ski allowing to indicate to the fitter where he must place the binding device so that the ski boot is substantially centered around this mark
  • this zone of the ski corresponds to that which undergoes the most compressive stresses, because it is the support zone of the skier. It is therefore desirable to favor a large proportion of the element of the second type in this zone.
  • the front contact point (PA) which designates the point of contact of the ski with the ground, can be reinforced in flexion.
  • this zone of the ski corresponds to that which undergoes the most bending and torsion stresses, for example to follow the geometry of the ski run. It is therefore desirable to favor a large proportion of the element of the first type in this zone.
  • plywood is a robust material, easy to work with and which does not deform under the effect of heat or humidity. Skis, snowboards or snowboards are subjected to humid environments such as snow or sea water, the properties listed above thus make plywood a material of choice for the construction of gliding boards.
  • Plywood is also favored because it is part of the current trend of returning to more sustainable materials, respectful of the environment, and easily recyclable.
  • the layers forming the plywood elements have a thickness of between 1 and 3 mm.
  • the fineness of each of the layers thus makes it possible to obtain better flexibility and better cohesion between the different layers.
  • the choice of the thickness of each of the layers of plywood makes it possible to modulate the rigidity in bending/compression or in bending/torsion of the plywood elements used to form the core.
  • the elements of the first and of the second type each comprise an odd number of layers.
  • the plywood element thus comprises a plane of symmetry in its center, the layers being distributed symmetrically around this plane of symmetry.
  • the mechanical properties of the plywood element are also symmetrical with respect to this plane, which reduces the risk of damaging the core. Indeed, poorly distributed stresses on the core can create cracks or irreversible deformations, which degrade the performance of the board, or even render it unusable.
  • the elements of the first and second type can be positioned in the mold of the ski directly on top of each other or next to each other without any particular interface element.
  • the elements of the first and second type can advantageously be separated by an intermediate bonding layer.
  • the elements of the first and second type are preferably separated by an intermediate reinforcing layer which can be made of a material included in the group including metals and high tenacity fibers such as glass fibers and basalt fibers. .
  • High tenacity fibers have excellent tensile and compressive strength, while maintaining good flexibility and lightness.
  • the resin for impregnating the fibers can additionally perform a bonding function.
  • an intermediate layer thus makes it possible to leave a degree of flexibility and a certain freedom of movement between two elements of different types, in order to improve the transmission of forces between these two elements.
  • the intermediate layer may comprise fibers oriented along the longitudinal axis or fibers oriented along the transverse axis.
  • the mechanical strength properties are improved in the preferred fiber direction.
  • the intermediate layer can comprise both fibers oriented along the longitudinal and transverse axis.
  • the core comprises an element of the first type and an element of the second type, the element of the first type being covered at least partially by the element of the second type.
  • Such a core therefore comprises an element of the first type, covering the entire width of the core and intended to absorb the torsion and bending forces undergone by the board in order to stabilize the stroke of a user, and an element of the second type, superimposed to the element of the first type, narrower and intended to resist the compression forces exerted on the gliding board.
  • the element of the second type covers between 30 and 80%, or even 100% of the upper face of the element of the first type.
  • the mid-length of the core is intended to be located close to the support zone of the ski boot.
  • this zone needs to be reinforced in compression, which explains the coverage rate of the element of the second type.
  • the element of the first type may have a constant thickness, the element of the second type then having a variable thickness to follow the thickness profile of the core.
  • the element of the second type can have a constant thickness, the element of the first type having a variable thickness to adapt to the thickness of the core.
  • the core comprises two elements of the first type and one element of the second type, the element of the second type being arranged in the central zone of the core, the elements of the first type being arranged on either side of the element of the second type.
  • Such a core therefore comprises a central element intended to resist the compression forces exerted on the gliding board.
  • the side elements are, as for them, intended to absorb the torsion and bending forces undergone by the board in order to stabilize the stroke of a user.
  • the element of the second type may have a height greater than that of the side elements of the first type.
  • This specific form of the element of the second type adapts to the final thickness of the board and possibly makes it possible to favor the resistance to compression of the core.
  • the element of the second type covers between 50 and 70% of the total width of the core.
  • the median longitudinal plane of the core corresponds to the mid-length of the core.
  • the mid-length of the core may not correspond to the mid-length of the gliding board.
  • the mid-length of the core is generally located at the front of the underside of a ski, that is to say at the front of the support zone of the ski boot.
  • this zone is reinforced in compression, which explains the occupancy rate of the element of the second type.
  • the element of the second type may have a constant width over the entire length of the core, the elements of the first type having a variable width to follow the profile of the dimension line.
  • the element of the first type is then preferably of parallelepipedic shape, the elements of the second type having an internal side of rectilinear shape and an external side of curved shape, to follow the dimension line.
  • the dimension line of the core corresponds to the width evolution profile of the core along the longitudinal axis of the core.
  • the dimension line of the core corresponds to that of the ski.
  • the elements of the first type which can have a constant width over the entire length of the core, the element of the second type then having a variable width to follow the profile of the dimension line.
  • the element of the first type then comprises two sides of curved shape, the elements of the second type then also having the two inner sides and one outer of curved shape, to follow the shape of the element of the first type.
  • the elements of the first type are then bent to match the curved side shapes of the central element of the second type.
  • the core further comprises a polyurethane element comprising at least one recess made in the thickness of said polyurethane element, configured to allow the insertion of the elements of the first and of the second type in the at least a recess.
  • This embodiment makes it possible to obtain a hybrid core of polyurethane and wood.
  • the combination of these two types of materials makes it possible to obtain great versatility in the optimization and choice of ski parameters.
  • the profile of the sidecut of the ski is obtained by machining the polyurethane element and not the plywood element(s). This makes it possible to limit the zones of the core comprising wood fibers whose length is shortened to follow the line of the coast. Indeed, the short length of the wood fibers is of limited interest since the resistance characteristics of the wood are less.
  • the addition of polyurethane makes it possible to save a significant quantity of wood, which would only provide a limited mechanical effect.
  • the two recesses communicate at least partially via the upper face of the first recess and the lower face of the second recess.
  • the invention relates to a gliding board comprising a core as described previously.
  • the 1000 , 2000 core as shown on the figures 1 and 2 comprises a lower face intended to come opposite the gliding sole of the board, and an upper face, facing the lower face.
  • the lower face defines a plane P parallel to the plane xz described above.
  • the plane P comprises a longitudinal axis, oriented along the z axis, in the length of the board and a transverse axis, oriented along the x axis, in the width of the board.
  • the core 1000 , 2000 therefore has a thickness measured in a direction perpendicular to said lower face, that is to say along the y axis, and corresponding to the distance separating the lower face from the upper face of the core 1000, 2000 .
  • the core 1000, 2000 of the invention is formed of at least two distinct elements 100, 110, 200, 210 made of plywood.
  • a plywood element 100, 110, 200, 210 thus comprises alternating layers 101, 102, 111, 112, 201, 202, 211, 212 also called plies, held together by gluing.
  • the glue used can be urea-formaldehyde, melamine, phenolic or even resorcinol glue.
  • the thickness of an element 100, 110, 200, 210 in plywood generally varies between 5 and 50 mm depending on the configuration, generally between 5 and 30 mm for sliding boards of the alpine ski or ski touring type or even snowboard , see between 5 and 50 mm for cross-country ski type gliding boards, while the width varies between 30 and 150 mm for gliding boards of the type cross-country skis or alpine skis or ski touring, see between 150 mm and 500 mm for sliding boards such as wide skis or snowboards.
  • the layers 101, 102, 111, 112, 201, 202, 211, 212 preferably have a thickness of between 1 and 3 mm.
  • Layers 101, 102, 111, 112, 201, 202, 211, 212 are obtained by cutting thin sheets from wooden panels.
  • the wood used can come from any type of tree, with a preference for poplar.
  • the layers 101, 102, 111, 112, 201, 202, 211, 212 therefore comprise wood fibers with a preferred orientation, which depends on the wood used and the way in which the cut is made.
  • the core 1000 comprises two distinct elements 100, 110 made of plywood.
  • the element of the first type 100 is formed by a stack, along the axis of the thickness of the core 1000 , of layers 101 having wood fibers oriented along the longitudinal axis of the core 1000 and of layers 102 having fibers of wood oriented along the transverse axis of the core 1000 .
  • the fibers of the successive layers 101 , 102 have an orientation in the plane at 0°, then 90°, then again 0° with respect to the longitudinal axis of the core 1000.
  • the element of the first type 100 comprises between 1 and 10 layers, with preferably an odd number of layers and preferably 3 or 5 layers.
  • the element of the first type 100 has a constant thickness of 5 mm and consists of a superposition of three layers 101, 102, 101 of a constant thickness of 1.66 mm.
  • the element of the first type 100 has a constant thickness.
  • the thickness may vary along the longitudinal axis of core 1000, to accommodate the thickness of core 1000 .
  • the thickness of the element of the first type 100 can be between 3 and 15 mm, the smallest thickness being located at the level of the ends of the core 1000 , while the greatest thickness is located close to the central zone of the core 1000 .
  • the element of the first type 300 can have a variable width along the longitudinal axis of the core 3000 , to follow the profile of the dimension line.
  • the width can thus vary between 5 and 600 mm depending on the types of gliding boards and/or the embodiments.
  • the width of the element of the first type 300 can be between 50 and 120 mm, the smallest width being located close to the zone central core 3000 , while the widest width is located at the ends of the core 3000 .
  • the element of the second type 110 is formed by a juxtaposition, along the transverse axis of the core 1000 , of layers 112 having wood fibers oriented along the axis of the thickness of the core 1000 and of layers 111 having fibers of wood oriented along the longitudinal axis of the core 1000.
  • the element of the second type 110 comprises an odd number of layers.
  • the element of the second type 110 comprises between 10 to 50 layers for an alpine or touring ski, between 5 to 30 layers for a cross-country ski, and between 100 to 200 layers for a snowboard, which is a glide much wider than a ski.
  • the element of the second type 110 has a constant width of 60 mm and consists of 5 layers 111, 112 of a constant thickness of 12 mm.
  • the element of the second type 110 may comprise 27 layers 111 , 112 , formed by 3 longerons of 9 layers 111, 112 of 2.2 mm each and also has a constant width of 60mm.
  • the width of the element of the second type 110 can be between 50 and 100 mm, or even 150 mm for wide gliding boards and can vary along the longitudinal axis to follow the profile of the dimension line. .
  • the element of the second type 110 can have a height comprised between 1 and 10 mm, advantageously variable along the longitudinal axis of the core 1000 , to follow the thickness profile of the core 1000 .
  • the smallest thickness of the element of the second type 410 is located at the level of the ends of the core 4000 , while the strongest thickness of the element of the second type 410 is located near the central zone of the core 4000 .
  • the element of the second type 110 at least partially covers the element of the first type 100 .
  • the element of the second type 110 covers between 30 and 100% of the upper face of the element of the first type 100 , due to the non-constant width of the ski, and in particular its sidecut.
  • the element of the second type 110 can cover the entire upper surface of the element of the first type 100 , the two elements then having the same width.
  • the two elements 100 , 110 are bonded to each other by an intermediate bonding layer, for example made with a urea-formaldehyde, melamine, phenolic or resorcinol glue, or even a biosourced glue.
  • the two elements 100 , 110 can be separated by an intermediate reinforcing layer 115 , visible on the figure 4 , with a thickness between 0.1 and 1mm.
  • This intermediate reinforcing layer 115 is made of a metallic material or else of a material included in the group of high tenacity fibers, such as glass fibers or basalt fibers.
  • the intermediate reinforcing layer 115 is made of glass fibers oriented along the longitudinal axis of the core 1000.
  • the intermediate reinforcing layer 115 is made of basalt fibers oriented along the transverse axis of the core 1000 .
  • the intermediate reinforcement layer 115 can comprise both fibers oriented along the longitudinal axis of the core 1000 and along the transverse axis of the core 1000 . These fibers are preferably impregnated with a resin, in particular epoxy, to ensure bonding with the various constituent elements of the ski.
  • a first layer metal reinforcement or high tenacity fibrous reinforcement 180 is arranged between the edges 130 , on the sole 140 .
  • This first layer of fibrous reinforcement 180 is composed for example of 720 g/m 2 of glass fibers in warp, oriented in the longitudinal direction of the core and 80 g/m 2 of glass fibers in weft, oriented in the transverse direction of the core.
  • This first layer of fibrous reinforcement 180 has a thickness of approximately 1 mm.
  • a second layer of metal reinforcement or high tenacity fibrous reinforcement 190 covers the first reinforcement layer 180 and the edges 130 .
  • This second layer of fibrous reinforcement 190 has a thickness of approximately 1 mm.
  • the element of the first type 100 covers the reinforcing layer(s) 180 , 190 over a smaller width than the sole 140 , to allow the edges 120 to be placed on either side of the element of the first type. type 100 .
  • the edges 120 have almost the same height as the element of the first type 100.
  • the edges 120 may have a lower or greater height than that of the element of the first type 100, typically, the edges 120 may have the same height as the core 1001 , 1002 , that is to say a height equal to the sum of the heights of the element of the first type 100 and of the second type 110 .
  • an intermediate reinforcement layer 115 is arranged on the upper surface of the edges 130 and the lateral and upper faces of the element of the first type 100 .
  • the element of the second type 110 is placed on the intermediate reinforcement layer 115 , which covers the element of the first type 100 .
  • a metal plate 160 preferably made of Titanal ® or Zycral ® , with a thickness of between 0.1 and 2 mm is inserted on the core 1001, 1002 to allow unclamping between skis and boots.
  • a new layer of metallic reinforcement or fibrous reinforcement 150 covers the upper and side walls of the core 1001, 1002 .
  • This reinforcing layer 150 is covered by a protective top 170 intended for the protection and decoration of the ski 1100 , 1200.
  • any other type of ski structure composed of composite and/or metal reinforcements or even layers of wood positioned above and below the core can be envisaged.
  • these reinforcements will have lower grammages than those conventionally used in skis, due to a more mechanized core than usual.
  • the core according to the invention contributes to the bending and torsion stiffness of the ski more significantly than when using a conventional glued laminated wood core or a polyurethane core.
  • the reinforcements are formed of only 600g/m 2 of unidirectional glass fibers or even 420g/m 2 of unidirectional basalt fibers.
  • the reinforcements are not unidirectional but are reinforced in warp and in weft and have a total weight of glass greater than 700 g/m 2 , and most often equal to or greater than 800 g/m 2 .
  • reducing the weight of fibers used allows a weight gain on the total weight of the ski, and also reduces the environmental impact by reducing the proportion of non-recyclable material.
  • the invention also relates to a second embodiment illustrated in the figure 2 .
  • the core 2000 comprises three elements 200, 210 made of plywood.
  • a central element of the second type 210 and two side elements of the first type 200 arranged on either side of the central element of the second type 210 .
  • the element of the second type 210 is formed by a juxtaposition, along the transverse axis of the core 2000 , of layers 212 having wood fibers oriented along the axis of the thickness of the core 2000 and of layers 211 having fibers of wood oriented along the longitudinal axis of the core 2000 .
  • the element of the second type 210 comprises between 1 and 50 layers, with preferably an odd number of layers.
  • the element of the second type 210 has a constant width of 60 mm over the entire length of the core and consists of 5 layers 211 , 212 .
  • the element of the second type 210 can comprise 27 layers 211 , 212 , formed by 3 longerons of 9 layers 211 , 212 of 2.2 mm each and also has a constant width of 60mm.
  • the width of the element of the second type 210 can be between 50 and 150 mm, can be constant over the entire length of the core and/or of the ski or vary along the longitudinal axis to follow the profile of the line of side of the ski or another profile.
  • the element of the second type 210 can have a height of between 1 and 50mm, depending on the type of gliding board, advantageously variable along the longitudinal axis of the core 2000 , to follow the thickness profile of the core 2000 .
  • the elements of the first type 200 are formed by a stack, along the axis of the thickness of the core 2000 , of layers 201 having wood fibers oriented along the longitudinal axis of the core 2000 and of layers 202 having wood fibers oriented along the transverse axis of the core 2000.
  • the fibers of the successive layers 201, 202 have an orientation in the plane at 0°, then 90°, then again 0° with respect to the longitudinal axis of the core 2000 .
  • the elements of the first type 200 comprise between 1 and 10 layers, preferably with an odd number of layers.
  • the elements of the first type 200 consist of a superposition of three layers 201 , 202 , 201 .
  • the thickness of the elements of the first type 200 can be between 2 and 70 mm and the thickness can vary along the longitudinal axis of the core 2000 , in order to adapt to the thickness of the core 2000 .
  • the thickness of the elements of the first type 200 can be constant over the entire length of the core and preferably less than the thickness of the element of the second type 210 over the entire length of the core.
  • the thickness of the elements of the first type 200 can be identical to the thickness of the element of the second type 210 .
  • the element of the second type 210 can have a height greater than that of the elements of the first type 200 , typically, the element of the second type 210 can protrude from 2 to 10 mm with respect to the elements of the first type 200 .
  • the elements of the first type 200 can have a variable width along the longitudinal axis of the core 2000 , as illustrated in the figure 8 , to follow the dimension line profile.
  • the width can thus vary between 5 and 300 mm depending on the embodiments.
  • the elements 200 , 210 are glued together, for example via a urea-formaldehyde, melamine, phenolic or even resorcinol glue.
  • the elements 200 , 210 can be separated by an intermediate bonding layer with a thickness of between 0.1 and 1 mm.
  • This intermediate layer may be made of a material included in the group of high tenacity fibers such as glass fibers or basalt fibers.
  • the core 5000 , 5200 further comprises an additional polyurethane element 310 forming an envelope imprisoning the elements of the first and second type 100 , 110 .
  • the polyurethane element 310 has a substantially parallelepiped shape, the longer sides of which have a shape curved inwards so as to follow the side line of the ski.
  • the thickness of the polyurethane element 310 is between 2 and 80 mm.
  • the polyurethane element 310 has a first recess 312 formed in the thickness of the polyurethane element 310 .
  • This first recess 312 has a rectangular shape whose length and width are less than the length and the width of the polyurethane element 310 .
  • the distance between the longest edges of the first recess 312 and the side edges of the polyurethane element 310 is between 0.5 and 3 cm.
  • the distance between the shorter edges of the first recess 312 and the front and rear edges of the polyurethane element 310 is between 3 and 15 cm.
  • the first recess 312 is made in the lower part of the polyurethane element 310 and opens at least at its lower face. Of Preferably, the first recess 312 is formed over a thickness of between 0.2 and 40 mm.
  • the polyurethane element 310 also has at least one second recess 311 also made in the thickness of the polyurethane element 310 .
  • This second recess 311 also has a rectangular shape whose length and width are less than the length and the width of the polyurethane element 310 .
  • the distance between the longest edges of the first recess 312 and the side edges of the polyurethane element 310 is also between 0.5 and 3 cm.
  • the first recess 312 and the second recess 311 are superposed so that their positioning relative to the side edges of the polyurethane element 310 is identical.
  • the second recess 311 has a length greater than that of the first recess 312 .
  • the second recess 311 protrudes on each side of the first recess 312 over a length of between 3 and 15 cm.
  • the portions of the second recess 311 which protrude on each side of the first recess 312 are of the same length.
  • the second recess 311 is formed in the upper part of the polyurethane element 310 and opens out at least at its upper face.
  • the second recess 311 is formed over a thickness of between 0.2 and 40 mm.
  • the two recesses 311 , 312 communicate with each other via the lower face of the second recess 311 and the upper face of the first recess 312 .
  • the recesses can be obtained by molding and/or by machining.
  • the first recess 312 can be made by machining the entire thickness of the polyurethane element 310 so as to emerge at the level of the lower and upper faces of the polyurethane element 310 .
  • the second recess 311 is in the form of two recesses made on either side of the first recess 312 over a thinner thickness, so that the second recess 311 opens only at the level of the upper face of the polyurethane element 310.
  • the two lateral recesses can be made beforehand during the molding of the polyurethane element 310 or by machining.
  • a gliding board such as a ski 5100 , including a core 5000 , 5200 of the invention comprises a sole 140 , at the ends of which the edges 130 are arranged.
  • a layer of metal reinforcement or high tenacity fibrous reinforcement 180 is placed between the edges 130 , on the sole 140 .
  • the reinforcing layer 180 is a polyester veil.
  • Polyurethane element 310 covers reinforcement layer 180 over a width less than that of sole 140 , to allow edges 120 to be placed on either side of polyurethane element 310 .
  • the songs 120 have almost the same height as the polyurethane element 310 .
  • the edges 120 may have a height lower or higher than that of the polyurethane element 310 .
  • the polyurethane element 310 has at least one void filled by the presence of an element of the first type 100 and of an element of the second type 110 covering the element of the first type 100 .
  • a reinforcing layer 330 covers the polyurethane element 310, the edges and the element of the second type 110 .
  • a metal plate 160 preferably made of Titanal ® or Zycral ® , with a thickness of between 0.1 and 2 mm is inserted over the reinforcement layer 330 to allow unclamping between skis and boots.
  • a new layer of metallic reinforcement or fibrous reinforcement 150 covers the upper and side walls of the core 5000 , 5200 .
  • This reinforcement layer 150 is covered by a protective top 170 intended for the protection and decoration of the ski 5100 .
  • the invention makes it possible to develop a core giving a gliding board good mechanical properties in compression, in bending and in torsion by the combination of two elements of the first and second types allowing to optimize the mechanical resistance of the board in the three directions of space.
  • the core obtained is therefore more mechanized and makes it possible to reduce the thickness and/or the basis weight of the mechanical reinforcements usually added.
  • the invention finally makes it possible to reduce the number of materials used for making the ski, and to favor natural materials in order to tend more and more towards eco-designed gliding boards, more respectful of the environment and more easily recyclable.

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  • Laminated Bodies (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
EP22172596.3A 2021-05-19 2022-05-10 Kern für gleitbrett und entsprechendes gleitbrett Pending EP4091683A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2105235A FR3123003A1 (fr) 2021-05-19 2021-05-19 Noyau pour planche de glisse et planche de glisse associee

Publications (1)

Publication Number Publication Date
EP4091683A1 true EP4091683A1 (de) 2022-11-23

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FR (1) FR3123003A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR843973A (fr) 1938-03-23 1939-07-13 Drouhin Ets Ski en bois contreplaqué armé
WO1991008029A1 (de) * 1989-12-06 1991-06-13 Kästle Aktiengesellschaft Ski
DE29502290U1 (de) 1995-02-13 1995-03-30 Schwabe Thorsten Snowboard in Schichtbauweise mit asymmetrischem Kernaufbau
US6073956A (en) * 1997-06-04 2000-06-13 Sims Sports, Inc. Snowboard with honeycomb at tip and tail
WO2002056978A1 (en) * 2001-01-18 2002-07-25 K-2 Corporation Integrated modular glide board
FR2909893A1 (fr) * 2006-12-14 2008-06-20 Alain Zanco Mecanisation optimisee pour une planche de glisse sur neige.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR843973A (fr) 1938-03-23 1939-07-13 Drouhin Ets Ski en bois contreplaqué armé
WO1991008029A1 (de) * 1989-12-06 1991-06-13 Kästle Aktiengesellschaft Ski
DE29502290U1 (de) 1995-02-13 1995-03-30 Schwabe Thorsten Snowboard in Schichtbauweise mit asymmetrischem Kernaufbau
US6073956A (en) * 1997-06-04 2000-06-13 Sims Sports, Inc. Snowboard with honeycomb at tip and tail
WO2002056978A1 (en) * 2001-01-18 2002-07-25 K-2 Corporation Integrated modular glide board
FR2909893A1 (fr) * 2006-12-14 2008-06-20 Alain Zanco Mecanisation optimisee pour une planche de glisse sur neige.

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