EP0332503A1 - Ski mit verbesserten Kanten - Google Patents

Ski mit verbesserten Kanten Download PDF

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Publication number
EP0332503A1
EP0332503A1 EP89400568A EP89400568A EP0332503A1 EP 0332503 A1 EP0332503 A1 EP 0332503A1 EP 89400568 A EP89400568 A EP 89400568A EP 89400568 A EP89400568 A EP 89400568A EP 0332503 A1 EP0332503 A1 EP 0332503A1
Authority
EP
European Patent Office
Prior art keywords
enamel
edges
ski
edge
ski according
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.)
Withdrawn
Application number
EP89400568A
Other languages
English (en)
French (fr)
Inventor
Henri Piera
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.)
SEB SA
Original Assignee
SEB 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 SEB SA filed Critical SEB SA
Publication of EP0332503A1 publication Critical patent/EP0332503A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/04—Structure of the surface thereof
    • A63C5/048—Structure of the surface thereof of the edges

Definitions

  • the present invention relates to a ski, and more particularly the edges which line the longitudinal edges of the bottom sole of the ski intended to be in contact with the ground.
  • edges of a ski ensure its stability and grip on hard snow and ice, and also ensure, to a certain extent, its sliding.
  • the edges are generally made of carbon steel.
  • edges oxidize in air and in contact with water and no longer perform their function properly if they are not regularly rubbed with an emery cloth and if the edge is not sharpened. Indeed, the oxidation of the edge surface destroys the polish thereof, and the oxidation of the cutting edge destroys the edge of the latter. As a result, the ski slides and grips less well on snow and ice when the edges are not polished regularly.
  • aluminum or aluminum alloy edges are known which have the advantage of greater lightness but which are like steel edges sensitive to oxidation, and which in general are judged too little. hard.
  • a very hard material such as a ceramic material (carbides, borides, nitrides, silicides of transition metals), a very hard metal oxide or a cermet.
  • the object of the present invention is to remedy the drawbacks of known skis, and to provide a ski whose edges retain their properties over time without requiring frequent maintenance and provide the latter with improved gliding characteristics.
  • the ski targeted by the invention has, in a manner known per se, on its lower face intended to be in contact with the ground, a sole whose longitudinal edges are provided with metal edges.
  • this ski is characterized in that the edges are coated, at least on their outer faces, with at least one layer of enamel obtained by baking an enamel frit slip.
  • the edge keeps its edge because the enamel, which behaves like glass, remains sharp even in the event of scratching or splintering.
  • the surface of the edges intended to come into contact with the ground has an anti-recoil relief.
  • the enamel layer has a composition suitable for adhering to steel, and if the edges are made of aluminum alloy, the enamel layer has a composition suitable for adhering to the aluminum alloy. Can also be incorporated in this enamel layer, hardening agents and / or agents promoting sliding.
  • the ski 1 has on its underside intended to be in contact with the ground 2 a sole 3 whose longitudinal edges are provided with metal edges 4.
  • the edges 4 are coated, at least on their outer faces 5, 6, of at least one layer of enamel 7 obtained by baking an enamel frit slip.
  • the ski 1 also comprises, in a known manner, a core 8 which is, in the example shown, a tubular metallic core having longitudinal tubular openings 9 into which fibers, (in a manner known per se) can be introduced. not shown) such as carbon or aramid fibers.
  • the ski 1 also comprises on either side and below the core 8 several layers 10, 11, 12 of plastic or metal.
  • the sole 2 consists of at least two layers 13, 14 of plastic located between the edges 4, the outer layer 13 in contact with the ground 2 partially ensuring the sliding of the ski 1 on this ground.
  • the edge 4 is coated on its two outer faces 5, 6 with an enamel layer 7 whose thickness is very exaggerated in the figure. This layer of enamel is obtained by baking an enamel frit slip suitable for the metal of the edge.
  • the underside 5 of the edge 4 has a shoulder 15 beyond which extends inward an inner portion 16 of smaller thickness of the edge 4.
  • the thickness of the shoulder 15 corresponds substantially to the thickness of the aforementioned layer 13, and the thickness of the inner part 16 of the edge corresponds substantially to that of the layer 14.
  • the inner edge 17 of the inner part 16 of the edge 4 is hollowed out by notches 18 in the form of ⁇ intended to receive lateral projections of shape complementary to the layer 14. The edge 4 is thus firmly anchored to this layer 14 and so skiing 1.
  • the edge 4 shown in Figure 2 is completely coated with an enamel layer 7 whose thickness is very exaggerated in the figure.
  • this enamel layer is obtained by baking an enamel frit slip adapted to the metal of the edge.
  • the face 5 intended to come into contact with the ground of the edge 4 has, before enameling, an anti-recoil relief in the form of scales 19 in relief intended not to hinder the sliding in the direction normal evolution of the ski indicated by the arrow 20, and to oppose at least partially a sliding of the ski in the opposite direction to the outer surface of the enamel layer 7 reproduces substantially, after baking, the anti-relief recoil 19 given to the face 5 of the edge 4 intended to come into contact with the ground.
  • This relief can be of the order of a few tens of microns.
  • the outer faces 5, 6 of the edge 4 and the cutting edge 21 thereof at the junction of these two faces are protected from oxidation on contact air and water through the enamel layer 7.
  • edge 4 in steel must imperatively be made of so-called low-carbon enamel steel if it must be coated with enamel on all its faces, to avoid during the firing of the enamel any risk of gassing which can cause blistering in the 'E-mail.
  • the edge 4 can be made of ordinary steel if it is to be coated with enamel only on its outer faces 5, 6, any gaseous release which can then occur during the firing of the enamel by the uncoated faces.
  • the steel should preferably also be a steel of the shallow stamping type in order to easily allow stamping of the shoulder 15, of the cells 18 in the form of ⁇ and of the anti-recoil relief in the form of scales 19.
  • the edge 4 made of aluminum or aluminum alloy must imperatively be made of aluminum or aluminum alloy called enamelled.
  • compositions of the enamel frit and the enamel slip are known conventional compositions of course adapted to the nature of the metal of the edge.
  • the slip can be deposited by dipping the edge if it has to be coated on all of its faces, or for example by spraying with a spray gun if the edge is only to be coated on its outer faces. In all cases, the enamel is fired before the ski is made.
  • the enamel is a so-called mass enamel with very good adhesion to steel.
  • the compositions of the enamel frit and the enamel slip may for example be the following, the percentages being given by weight: enamel frit known as mass, by weight slip formulation (parts by weight) If 30 to 40% enamel frit 100 A12O3 2 to 5% mass clay 5 to 7 WHERE 15 to 20% Bentonite 0.05 to 0.2 Na2O 10 to 15% Borax 0.05 to 0.3 K2O 1 to 3% Mg carbonate 0 to 0.1 CaO 5 to 8% Nitrite of soda 0 to 0.2 F2 2 to 5% Quartz 0 to 10 WHERE 0 to 2% Water 45 CoO 0.5 to 1% CuO 0.5 to 1%
  • the frit can have a fineness of 1 to 3 with a BAYER 3600 sieve.
  • the thickness after baking is for example from 80 to 150 microns, the baking taking place between 780 ° C and 850 ° C, preferably with a level of 3 to 5 minutes between 780 ° C and 820 ° C.
  • compositions of the enamel frit and the enamel slip may for example be as follows, the percentages being given by weight: enamel frit, by weight Enamel slip (parts by weight) If 34% Enamel frit 100 Na2O 20% Boric acid 4 K2 O 10% Soda metasilicate 1 Li2O 2% Potash 1 TiO2 20% Pigments 0 to 10 A12O3 2% Water 56 WHERE 2% WHERE 10%
  • the frit can have a fineness of 0.2 with a 16 900 BAYER sieve.
  • the thickness after baking is for example 40 to 80 microns, baking taking place at 560 ° C.
  • agents improving gliding for example materials with a lamellar structure such as graphite or molybdenum disulphide, or colloidal silica.
  • the enamel frit can also include coloring pigments which make it possible to provide the ski with colored edges giving them an additional attractive appearance.
  • edges according to the invention are used in exactly the same way as conventional edges for the manufacture of a ski.
  • a mold is used at the bottom of which the edges are placed against the lateral edges thereof, the outer faces of the edges being in contact with the walls of the mold.
  • plastic material 13, 14 constituting the sole are put in place at the bottom of the mold, other possible intermediate layers, the core 8, then the plastic layers 10, 11, 12 of the upper part of the ski.
  • fibers can be introduced into the tubular openings 9 and fixed to the ends of the ski in a known conventional manner.
  • the mold is then closed and the ski is compressed and heated to ensure the polymerization of the plastic materials and the adhesion of the various layers constituting the ski between them.
  • the enamelled edges in accordance with the invention provide the following advantages to skis which are equipped with them: - the edges do not oxidize and it is not necessary to rub them with emery cloth and to sharpen their edge to maintain the sliding of the skis and the ability of the edges to "hang” on hard snow or ice ; - because of the thermally insulating nature of the enamel, the cold thermally conductive metal of the edge no longer prevents the formation, on the surface of the snow, under the pressure of the ski, of a film of water on which will slide the ski.
  • the sliding of the ski is therefore improved; - for the same reason, it is possible to give the face of the edge intended to come into contact with the ground an anti-recoil relief which further improves the sliding of the ski in the normal direction of use thereof by reduction friction between the ski and the snow, and at least partially opposes the sliding of the ski in the opposite direction the surface of the enamel layer substantially reproduces the anti-recoil relief given before enamelling on the surface of the edge intended for come into contact with the ground; - it is possible to use aluminum edges and to give the enamel layer a hardness greater than that of aluminum by incorporating hardening agents in the enamel frit; - One can also incorporate into the enamel frit agents promoting sliding; - even in the event of scratches or splinters, the enamel behaves like a glass and remains sharp. the enameled edges in accordance with the invention therefore hang well on hard snow or ice; - the enamel layer is capable of withstanding without damage all the deformations by bending and / or torsion imposed on the edges when using the ski
  • the invention naturally applies to a ski of any structure, from the simplest ski to the most sophisticated skis, whatever the materials used for the manufacture of the ski, wood, metals, various plastics, etc. ...
  • the invention likewise applies to an edge of any cross section other than that shown in the figures, whatever the mode of attachment of the edge to the sole of the ski.

Landscapes

  • Laminated Bodies (AREA)
EP89400568A 1988-03-02 1989-03-01 Ski mit verbesserten Kanten Withdrawn EP0332503A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8802623 1988-03-02
FR8802623A FR2627996B1 (fr) 1988-03-02 1988-03-02 Ski a carres ameliorees

Publications (1)

Publication Number Publication Date
EP0332503A1 true EP0332503A1 (de) 1989-09-13

Family

ID=9363822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89400568A Withdrawn EP0332503A1 (de) 1988-03-02 1989-03-01 Ski mit verbesserten Kanten

Country Status (3)

Country Link
EP (1) EP0332503A1 (de)
DE (1) DE332503T1 (de)
FR (1) FR2627996B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0887090A1 (de) * 1997-06-27 1998-12-30 Skis Rossignol S.A. Verfahren zur Herstellung von Skikante für Gleitbretter
EP1385583B1 (de) * 2001-07-06 2005-08-17 C.D. Wälzholz-Brockhaus GmbH Skikantenprofil
AT501171A1 (de) * 2001-05-16 2006-07-15 Stahlwerk Ergste Westig Gmbh Gleitkantenprofil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE594391C (de) * 1934-03-16 Hermann Schacherl Skikantenbeschlag
FR1563297A (de) * 1968-03-22 1969-04-11
US3918728A (en) * 1974-06-21 1975-11-11 Walter F Stugger Snow ski and edge
FR2586430A1 (fr) * 1985-08-26 1987-02-27 Preci Coat Sa Procede de traitement pour diminuer l'usure et le frotttement d'objets et objets traites selon ce procede
EP0249894A2 (de) * 1986-06-14 1987-12-23 Feldmühle Aktiengesellschaft Ski

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE594391C (de) * 1934-03-16 Hermann Schacherl Skikantenbeschlag
FR1563297A (de) * 1968-03-22 1969-04-11
US3918728A (en) * 1974-06-21 1975-11-11 Walter F Stugger Snow ski and edge
FR2586430A1 (fr) * 1985-08-26 1987-02-27 Preci Coat Sa Procede de traitement pour diminuer l'usure et le frotttement d'objets et objets traites selon ce procede
EP0249894A2 (de) * 1986-06-14 1987-12-23 Feldmühle Aktiengesellschaft Ski

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0887090A1 (de) * 1997-06-27 1998-12-30 Skis Rossignol S.A. Verfahren zur Herstellung von Skikante für Gleitbretter
FR2765113A1 (fr) * 1997-06-27 1998-12-31 Rossignol Sa Procede de preparation de carres pour planche de glisse et planche de glisse obtenue avec ces carres
AT501171A1 (de) * 2001-05-16 2006-07-15 Stahlwerk Ergste Westig Gmbh Gleitkantenprofil
AT501171B1 (de) * 2001-05-16 2007-01-15 Stahlwerk Ergste Westig Gmbh Gleitkantenprofil für wintersportgeräte
EP1385583B1 (de) * 2001-07-06 2005-08-17 C.D. Wälzholz-Brockhaus GmbH Skikantenprofil

Also Published As

Publication number Publication date
FR2627996B1 (fr) 1990-12-21
FR2627996A1 (fr) 1989-09-08
DE332503T1 (de) 1989-12-28

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