EP4008414A1 - Ski avec decor en bas-relief et son procédé de fabrication - Google Patents

Ski avec decor en bas-relief et son procédé de fabrication Download PDF

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Publication number
EP4008414A1
EP4008414A1 EP20211433.6A EP20211433A EP4008414A1 EP 4008414 A1 EP4008414 A1 EP 4008414A1 EP 20211433 A EP20211433 A EP 20211433A EP 4008414 A1 EP4008414 A1 EP 4008414A1
Authority
EP
European Patent Office
Prior art keywords
ski
protective element
structural
skis
local
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
EP20211433.6A
Other languages
German (de)
English (en)
Inventor
Siegfried Rumpfhuber
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.)
O+ GmbH
Original Assignee
Typs GmbH
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 Typs GmbH filed Critical Typs GmbH
Priority to EP20211433.6A priority Critical patent/EP4008414A1/fr
Publication of EP4008414A1 publication Critical patent/EP4008414A1/fr
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
    • A63C5/003—Structure, covering or decoration of the upper ski surface
    • 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
    • A63C5/04—Structure of the surface thereof
    • 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
    • A63C5/124—Selection of particular materials for the upper ski surface
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C2203/00—Special features of skates, skis, roller-skates, snowboards and courts
    • A63C2203/08—Decoration

Definitions

  • the invention relates to a ski and a method for its manufacture.
  • Skis are snow gliding boards, such as alpine skis, touring skis, jumping skis, cross-country skis, monoskis or snowboards.
  • Skis can be manufactured using three different processes. The most economical skis are made using injection molding. High performance cannot be achieved in this case, since plastics are used which are optionally reinforced with short, unoriented high-performance fibers such as pieces of glass fiber. Skis manufactured using this method are mainly used in the children's area.
  • skis Compared to injection-moulded skis, higher-performance skis can be produced using injection processes. Such skis are somewhat more expensive and are mainly used in popular sports.
  • skis manufactured using the sandwich process are primarily used.
  • Such skis are composite workpieces and are manufactured by gluing several layers of different materials, such as wood, metal, plastic or fiber-reinforced plastic.
  • the bonding process is usually carried out under certain pressure and temperature regimes.
  • the components required for the ski are glued, usually with epoxy resin, and laid on top of each other in layers.
  • pre-impregnated layers so-called prepregs or adhesive films, can also be used. These usually liquefy at higher temperatures and create a connection with the layers above and below.
  • ski moulds made of aluminum, steel or the like are usually used as a ski mould. All the components are placed in a lower mold part of this ski mould. After inserting all the components, the ski mold is fitted with a mold top part or closed with a simple lid.
  • the shape of the ski primarily defines the outer contour of the ski.
  • pressure is applied to this unit consisting of the ski mold or base and cover, as well as the ski materials located in between, usually in combination with temperature.
  • the pressure is generated mechanically by a press, especially in the industrial press process.
  • the pressure level depends on the material, structure, adhesive system and other parameters.
  • the pressure is usually in the range of 2-12 bar.
  • the pressure is occasionally generated by a vacuum.
  • the assembled skis are sealed airtight with a bag or foil and a vacuum is created using a vacuum pump.
  • the resulting working pressure with this process is theoretically a maximum of 1 bar, in practice it is usually just under.
  • Another possibility is that the pressure is generated by filling hoses in a fixed framework, usually pneumatically.
  • the shape and function of a ski is set with the outer contour, also known as the sidecut, the height contour, also known as the ridge, the nose line, also known as the preload or camberline, and the structure or the different materials, material thicknesses and the arrangement of the different components.
  • the core of the ski is usually a laminate of different layers of wood and largely determines the structural, mechanical and dynamic properties of the ski.
  • the stiffness of the ski determines how aggressively you can change direction.
  • Materials with high rigidity used in ski construction are, for example, plastics reinforced with carbon fibers or glass fibers. These materials also often have high strength, making the ski tolerant of stress and potentially determining how long it lasts.
  • the material-related high sensitivity to lateral forces of fiber-reinforced plastics is overcome in the ski structure by using isotropic metals such as steel or titanal in areas subjected to lateral loads.
  • the damage tolerance of the ski is reinforced by dampening materials.
  • the ski structure is provided with a top layer that protects against scratches, cuts or similar damaging events causing notches.
  • This top layer can be a transparent, resistant lacquer, but also one of transparent plastic film printed on the back, such as a polyamide film, as a graphics carrier.
  • a cover layer made of wood can also be used.
  • the wooden top layer can be printed to provide manufacturer-specific identification. To ensure visual perceptibility, the print must be on top as wood is opaque. The disadvantage here is that the imprint only has a short service life, since it is exposed to external mechanical influences and weather influences with almost no protection. To counteract this, the top layer of wood can be oiled. In the medium and long term, however, no adequate protection can be guaranteed.
  • elastomeric layers as a top layer, such as those used on the inside of the ski to improve the ski's dynamic properties and damping properties.
  • elastomeric layers suitable for this are opaque, which means that the manufacturer-specific labeling of the ski, which is enormous important for marketing purposes, is no longer possible using graphics, lettering or the like located under the protective varnish or under the plastic film. This results in serious economic disadvantages.
  • Geometric structures can be applied to the ski by means of grinding. These are conventionally applied to the underside of the ski, for example by means of stone or corundum grinding, in order to set defined gliding properties. Special abrasives are used for this. These have a profile that is then reproduced as a pattern on the ski. Due to the technology, only patterns with repeating elements are possible, which in turn can only be varied by laboriously changing or dressing the abrasives. The use of Grinding technology for the production of manufacturer-specific markings therefore does not prove to be advantageous.
  • a significantly greater variability in the mapping of manufacturer-specific markings enables the local thermal treatment of workpieces. Similar to printing with a print head, color particles can be applied, and a microstructure variation or structural variation can be introduced with pinpoint accuracy by heating. Starting from its surface, the workpiece is heated so intensely within a joint area that the original structure can no longer be preserved and the originally solid material, for example, locally changes to a removable state of aggregation. The heat input takes place, for example, by means of a laser, as a result of which the joint material can be liquefied, oxidized or vaporized. The potentially removable material can be removed using a process gas that also protects the laser optics.
  • the intensity, the local dwell time and the focused area of the laser it is influenced what amount of thermal energy is introduced into the workpiece within which area, i.e. how deep and broad the structural variation is introduced.
  • a local thermal treatment of the workpiece without subsequent removal of the material can be used to change the surface structure in a targeted manner, for example to roughen it or to change the colour, whereby optical effects can be achieved.
  • the workpiece to be marked can be offset.
  • a large-area motif can be displayed line by line on elongated workpieces, such as skis, in combination with a piecewise offset of the workpiece along the longitudinal axis of the ski.
  • the object on which the invention is based is to overcome the economic disadvantages described above by providing a method with which a ski with an external, opaque protective coating and manufacturer-specific identification can be produced.
  • a method according to the invention comprises the following steps: provision of a structural element and a protective element, construction of a structural structure using the structural element, hardening of the structural structure, joining of the protective element and the hardened structural structure, and local, thermal structural change in the protective element.
  • the local, thermal structural change of the protective element can be used to display a manufacturer-specific label that is useful for marketing purposes.
  • manufacturer-specific identification designates, among other things, everything that can be recognized visually and/or haptically as a difference from the environment that is not purely functional. Accordingly, manufacturer-specific markings can include patterns, logos, lettering, graphic images, haptic elements and structures.
  • the structural build-up is consolidated by means of a molding technique.
  • a high component quality can be achieved, which is beneficial to the performance of the ski.
  • the protective element and the reinforced structure are joined by means of a bonding technique.
  • Other joining techniques that seem suitable at first glance are those in which joining components such as screws, rivets or similar components are introduced into the joining partner. Such a joining, however, introduces stresses into the ski that impair the performance of the ski and causes high production costs. Adhesive joining, on the other hand, leads to low production costs and optimal ski performance.
  • the local, thermal structural change of the protective element takes place using laser technology.
  • subtractive methods suitable for the introduction of manufacturer-specific markings are milling, grinding, stamping or cutting, whereby the structural design or the protective element is potentially damaged, which negatively influences the performance of the ski.
  • laser technology such high accuracies are not possible with the alternative methods mentioned, and higher production costs are associated.
  • Another alternative is to introduce the manufacturer-specific identification during the manufacture of the protective element.
  • this is accompanied by a disadvantage that occurs later in the ski manufacturing process, namely that extremely complex positioning of the protective element is necessary, particularly when skis are used as a pair of skis and the manufacturer-specific identification of one ski is to match the manufacturer-specific identification of the other ski.
  • the ski is advantageously clamped with reflective components. These are not damaged by laser radiation, so that the local, thermal structural change can be carried out up to and including the edge area of the protective element. Shiny metallic components can be used for clamping.
  • the material of the protective element can be removed locally by means of the local, thermal structural change.
  • the removable material can be present, for example, in a solid or powdery, in a liquid and in a gaseous form. This leads to a local structural change that is potentially visually perceptible even in the cooled, i.e. resolidified state, as a structural variation, for example as a roughened area or as a depression, but also as an area that has changed color and can therefore potentially be used to represent a manufacturer-specific identification.
  • the locally removable material is then also removed.
  • depressions can be made locally in the protective element, which can potentially stand out visually from the surrounding areas. This results in the advantage that manufacturer-specific identifications can potentially be displayed with a pronounced perceptibility.
  • the locally removable material becomes complete locally removed, it is advantageous that a component that cannot be damaged by local, thermal structural changes is used below the protective element. In this way, the performance of the ski is not impaired. If the local, thermal structural change of the protective element takes place using laser technology, a reflective component, for example a shiny metallic layer, can be used for this purpose.
  • the invention also relates to a ski which has a flat upper side and a flat lower side, which comprises the structural element and protective element components and is characterized in that an outwardly directed surface of the protective element has a local structural variation.
  • This structural variation can be a local variation of the microstructure, a local variation of the geometry or an indentation. With this structural variation, a manufacturer-specific identification of the ski is displayed, which makes it directly visible by which company the ski was manufactured. This is particularly advantageous from a marketing point of view.
  • the protective element has a thickness of preferably 0.1-3.0 mm.
  • the minimum thickness is in particular 0.2 mm and particularly preferably 0.5 mm.
  • the maximum thickness is in particular 2.0 mm and particularly preferably 1.0 mm.
  • a small thickness is set to increase efficiency or a large thickness to increase the protective effect.
  • the structural variation of the protective element is an indentation with a thickness in the range of preferably 0.1-3.0 mm.
  • the minimum thickness is in particular 0.2 mm and particularly preferably 0.5 mm.
  • the maximum thickness is in particular 2.0 mm and particularly preferably 1.0 mm.
  • a low thickness is set for increased protection or a high thickness for increased visibility.
  • the protective element which has a depression, is located on the upper side of the ski, as a result of which the manufacturer-specific identification is also visible during use on the ski slope.
  • the protective element contains a plastic.
  • Plastics potentially have good joinability using adhesive technology and are light, which is beneficial to the performance of the ski.
  • the plastic contained in the protective element can be an elastomer. Elastomers potentially exhibit excellent cushioning properties and high resistance to tearing, tear propagation and cuts, thereby protecting against the majority of surface damage. This results in the advantage that, on the one hand, damping properties are improved with a single component and, on the other hand, a protective effect is achieved, as a result of which no further components that assume these functions are required. This allows weight and costs to be reduced, which means that the performance and economy of the ski can be increased.
  • the elastomeric protective element is preferably a film. Foils are flexible, flat, thin elements and enable easy handling during the manufacturing process. In addition, due to their potentially low weight, they can be used to achieve high ski performance.
  • the protective element includes wood.
  • this light and stiff group of materials enables the setting of a defined deflection of the ski.
  • skis that are primarily light (for example a thin protective element made of light balsa wood) but also primarily stiff (for example a thick protective element made of stiff ash wood) can be provided.
  • wood makes it possible to flame or carbonize it by means of local, thermal structural changes, which on the one hand protects the wood and the rest of the ski underneath it mechanically and from moisture.
  • the wood can be locally discolored, which enables manufacturer-specific identification.
  • the wood included in the protective element is a veneer. This means that the protective element can potentially be made very thin and with a high level of uniformity, which is beneficial to the performance of the ski.
  • the structural variation of the protective element is visually perceptible in relation to the adjoining area which has no structural variation of the protective element.
  • a further embodiment relates to a pair of skis, the visually perceptible structural variation of one ski being complementary to the visually perceptible structural variation of the other ski. This ensures that the overall product appears uniform and of high quality, which can have a positive influence on customers' purchasing decisions.
  • a ski 100 according to the invention which in a simple embodiment consists of a protective element 102 lying on top and a structure 106 lying underneath.
  • the structure 106 consists of at least one structural element 104.
  • an abstract structure 106 according to the invention consisting of two structure elements 104 is shown.
  • a metal layer 112, a high-performance fiber layer 114, a torsion box 116, a side wall 118, a wood core 120, a damping element 122, a tread 124 and a metal edge 126 can be used as the structural element 104, for example.
  • Each design variant has specific functional and structural properties.
  • FIG. 1c An exemplary, simplified structural design 106 consisting of a high-performance fiber layer 114 and a torsion box 116 is shown. In this way, high longitudinal rigidity and strength can be combined with high torsional rigidity and strength.
  • the individual structural elements 104 are preferably combined to form an advantageous structural design 106, as is shown in FIG Figure 1d illustrated ski 100 is shown.
  • the arrangement of the individual structural elements 104 shown is exemplary and does not limit the scope of protection.
  • the metal layer 112 as the structural element that is preferably located on top, tends to have high rigidity and strength, but at the same time also has a high weight.
  • high-performance fiber layer 114 which is preferably located below the metal layer, similarly high rigidity and strength as with the metal layer 112 can be achieved with a load path-oriented design, or potentially even higher relevant characteristic values.
  • high-performance fibers such as glass or carbon fibers tend to be lighter than metals.
  • high-performance fibers are susceptible to lateral loads and therefore lead to a lower damage tolerance - compared to metals.
  • the torsion box 116 which is preferably located below the high-performance fiber layer 114, preferably consists of elements with high rigidity and high strength, for example high-performance fibers such as carbon fibers or mixtures of carbon and glass fibers, which are preferably aligned in such a way that the ski 100 is prevented from twisting becomes. However, they potentially only make a small contribution to the longitudinal stiffness and strength of the ski 100 .
  • the torsion box 116 preferably completely encloses the wood core 120 so that the torsionally weak wood core 120 is protected from torsional loads.
  • the side wall 118 is preferably arranged in such a way that the high-performance fiber layer 114 and torsion box 116 components, which are sensitive to lateral forces, are covered on the side and are thus protected from lateral loads. Particular preference is given to using side cheeks 118, ie two pieces, on both sides.
  • the wood core 120 is also covered laterally by the sidewall and is thus protected from lateral loads and water or moisture.
  • the wood core 120 which is preferably arranged inside the torsion box, preferably consists of several glued layers of wood, which can also consist of different types of wood.
  • a further high-performance fiber layer 114 is preferably located underneath the wood core 120.
  • the damping element 122 is preferably located next to this. Damping elements 122—that is, two pieces—are particularly preferably used on both sides.
  • the damping element 122 is preferably made of a resilient, vibration-resistant and energy-absorbing material, for example an elastomeric torsional stress.
  • impact or shock-related loads can be well dissipated, for which the highly rigid components, such as the high-performance fiber layer 114, are not suitable.
  • the dynamic properties of the ski 100 can be positively influenced and running smoothness adapted to the driving application can be set.
  • the same material can be used for the protective element 102 and the damping element 122, so that the protective element 102 can also assume damping functions.
  • a structural variation 130 according to the invention is in Figure 2a shown.
  • the protective element 102 has a smooth surface on the upper side and a roughened surface in the area of the structural variation 130 .
  • Optical effects can already be set in the micrometer range.
  • the roughening can be adjusted by various surface treatment methods such as EDM, etch graining or blasting.
  • the structural variation is particularly preferably introduced into the surface by means of a laser beam 134 by means of a local, thermal structural change, since in this way costs can be saved and higher production accuracies can be set compared to other methods for surface treatment.
  • the process of laser texturing can preferably be used.
  • Three-dimensional structures can be created using multi-axis systems, for example 5-axis systems. These can be adjusted in such a way that they create a different visual impression depending on the viewing angle.
  • the use of laser technology also enables the introduction of structural variations in the form of color changes.
  • FIG 3 A preferred embodiment of the method according to the invention for manufacturing a ski 100 is shown.
  • the material in the protective element 102 is heated locally by means of laser radiation 134 and is thus converted into liquid or gaseous, removable material 132 .
  • the removable material 132 is left in its original location, in the in Figure 2b case shown removed. The removal of the removable material 132 results in an indentation 131 being introduced which is visually clearly discernible.
  • FIG. 2c a protection element 102 with locally completely removed removable material 132 is shown. Accordingly, the resulting depression 131 extends to the structural element 104 located under the protective element 102. In this way, maximum visual perceptibility is achieved.
  • a preferred embodiment of a pair of skis 101 according to the invention is figure 4 shown.
  • An oval manufacturer-specific identification by means of two complementary, semi-oval local variations of the geometry 130 is shown here as an example.
  • manufacturer-specific markings that are not recognized at first glance as complementary in the sense of visually complementing each other, but as complementary in the sense of visually belonging together and/or belonging together or complementary in terms of content.
  • some of the components can be placed on one ski 100 of the pair of skis 101 and the other part of the components on the other ski 100 of the pair of skis 101.

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EP20211433.6A 2020-12-03 2020-12-03 Ski avec decor en bas-relief et son procédé de fabrication Pending EP4008414A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20211433.6A EP4008414A1 (fr) 2020-12-03 2020-12-03 Ski avec decor en bas-relief et son procédé de fabrication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20211433.6A EP4008414A1 (fr) 2020-12-03 2020-12-03 Ski avec decor en bas-relief et son procédé de fabrication

Publications (1)

Publication Number Publication Date
EP4008414A1 true EP4008414A1 (fr) 2022-06-08

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Application Number Title Priority Date Filing Date
EP20211433.6A Pending EP4008414A1 (fr) 2020-12-03 2020-12-03 Ski avec decor en bas-relief et son procédé de fabrication

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EP (1) EP4008414A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6357781B1 (en) * 1999-11-05 2002-03-19 Salomon S.A. Gliding or rolling board
AT7246U2 (de) * 2004-07-09 2004-12-27 Isosport Verbundbauteile Oberflächenfolie für ein schneegerät
US7338066B2 (en) * 2004-01-30 2008-03-04 Atomic Austria Gmbh Method for producing a board-like gliding device, and a board-like gliding device
US20170072288A1 (en) * 2015-09-10 2017-03-16 Grace Skis Apparatus and method for flattening and laser engraving skis

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6357781B1 (en) * 1999-11-05 2002-03-19 Salomon S.A. Gliding or rolling board
US7338066B2 (en) * 2004-01-30 2008-03-04 Atomic Austria Gmbh Method for producing a board-like gliding device, and a board-like gliding device
AT7246U2 (de) * 2004-07-09 2004-12-27 Isosport Verbundbauteile Oberflächenfolie für ein schneegerät
US20170072288A1 (en) * 2015-09-10 2017-03-16 Grace Skis Apparatus and method for flattening and laser engraving skis

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ISOSPORT: "ISOCAP: top sheets", 1 January 2017 (2017-01-01), pages 1 - 15, XP093303073, Retrieved from the Internet <URL:https://batavia.internal.epo.org/citenpl/prod/web/citenpl/citenpl.html?dossierId=1516611&dossierNumber=EP20211433&drawerId=TRI&metaUrl=https%3A%2F%2Fwww.isosport.com%2Fploxmedia%2F_1_%2F93348216801c444e570b14985959f68b%2FISOCAP%2BFolder.pdf&uploadDocument=yes> [retrieved on 20250806] *
SONNE & WOLKEN: "Ich BAUE MEINE EIGENEN SKI!!! - Ski selber bauen in Sankt Johann-Alpendorf // Travel Vlog", 22 January 2018 (2018-01-22), pages 1, XP054981820, Retrieved from the Internet <URL:https://www.youtube.com/watch?v=bKXT6LaQxn8> [retrieved on 20210520] *

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