EP0294299B1 - Abfahrtski und Verfahren zu seiner Herstellung - Google Patents

Abfahrtski und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0294299B1
EP0294299B1 EP88420168A EP88420168A EP0294299B1 EP 0294299 B1 EP0294299 B1 EP 0294299B1 EP 88420168 A EP88420168 A EP 88420168A EP 88420168 A EP88420168 A EP 88420168A EP 0294299 B1 EP0294299 B1 EP 0294299B1
Authority
EP
European Patent Office
Prior art keywords
sole
thickness
layer
ski
central portion
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.)
Expired - Lifetime
Application number
EP88420168A
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English (en)
French (fr)
Other versions
EP0294299A1 (de
Inventor
Roger Abondance
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
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 filed Critical Skis Rossignol SA
Priority to AT88420168T priority Critical patent/ATE57310T1/de
Publication of EP0294299A1 publication Critical patent/EP0294299A1/de
Application granted granted Critical
Publication of EP0294299B1 publication Critical patent/EP0294299B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A63C5/06—Skis or snowboards with special devices thereon, e.g. steering devices
    • A63C5/07—Skis or snowboards with special devices thereon, e.g. steering devices comprising means for adjusting stiffness
    • 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

Definitions

  • the present invention relates to a downhill ski, also called downhill or alpine ski, as well as to a method of manufacturing such a ski.
  • the lower part of a large number of currently known piste skis consists of a sole of high density polyethylene and of very high molecular weight, which is bordered by steel edges.
  • Document CH-A 549 393 relates to a ski comprising a sole made of synthetic material of identical thickness at the level of its edges embedded in the edges and in its central part, with the exception of the central and longitudinal groove; the central part of the sole is in contact by its face facing the side of the core, with a layer of flexible material filling a recess of the same volume.
  • the sole Upon contact of the sole with an obstacle such as a stone, the sole deforms inward, which prevents its deterioration.
  • the invention aims to improve the sliding of piste skis with semi-rigid plastic sole, more particularly with polyethylene sole. It is based on the observation, made by observing children's games using either inflatable sleds or sleds made of rigid plastic, that the sliding on snow of inflatable sleds is greater than that of sleds made of rigid plastic.
  • the ski which it concerns comprising a sole made of flexible or semi-rigid material of constant profile over substantially the entire length of the ski, the two longitudinal edges of which are embedded in metal edges and the central part of which is in contact, by its face turned on the core side with a layer of elastic material, is characterized in that the central part of the sole has a thickness less than the thickness of its lateral zones embedded in the lower edges and in that the layer of elastic material interposed between the central part of the sole and a hard layer situated on the side of the core is compressed between these two elements, its thickness before compression being greater than the difference between the two thicknesses of the sole.
  • a sole is first produced by extruding polyethylene which is profiled so as to have a flat base and a thickness which is, in the transverse direction, significantly greater at the edges than in the middle part. remaining. Skiing is then carried out by stacking under pressure in the mold of several layers, including this profiled sole, placed in the bottom of the mold and bordered by the two lower edges, then a layer of elastic foam, overcoming at least the sole portion of lesser thickness and having a thickness greater than the hollow formed in this sole due to this lesser median thickness, then at least one hard layer, such as a rigid reinforcement layer.
  • Figure 1 shows the appearance of the polyethylene strip, obtained by extrusion in a piston extruder, which is intended to constitute, after cutting to the correct length, the sole 1 of this ski.
  • the central part 2 of the polyethylene band 1, which is glued to the structure of the ski by means of an elastic foam support, may be, because of its relative thinness, considered to be flexible, while the two bands lateral 3, much thicker and directly attached to the ski structure, are rigid.
  • E is for example equal to 1.5 millimeters, while e is equal to 0.5 millimeters.
  • FIG. 2 shows the stacking, in a mold of which the bottom 4 and the side edges 5 are shown, of the constituent elements of this ski.
  • a layer 7 of elastic polyethylene foam we put a layer 7 of elastic polyethylene foam, the thickness before compression is significantly greater than E - e.
  • a rigid reinforcement 8 is applied over the entire width of the ski, then the core 9 and the two lateral edges 10, and finally an upper layer 11 followed by a cover layer 12.
  • the mold cover not shown, is then put in place and strongly pressurized, which among other things strongly compresses the elastic layer 7.
  • the ski schematically takes the appearance shown in cross section in FIG. 3: the compressed foam 7 has, by inflating, pushed the thin part 2 of the sole 1 down, of so that the sole 1 of the ski has a central part which has a slight downward recess d, giving it a generally convex shape (this recess was very exaggerated in FIG. 3 for the clarity of the description).
  • the part 2 and the foam 7 being flexible and elastic, the ski therefore rests on a kind of elastic cushion in excess thickness.
  • Figures 4 and 5 show the state of the ski under the boot 13 of the skier , where the support is maximum. At the front 14 and at the rear 15 of the ski, the vertical support is less, so that the section of the ski takes the slightly convex shape of FIG. 3.
  • another material than polyethylene could be used both for the production of the sole and for that of the layer of elastic foam.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Claims (6)

1. Abfahrtsski, umfassend eine Belagplatte aus einem nachgiebigen oder halbstarren Material mit einem im wesentlichen auf der gesamten Länge des Skis gleichbleibendem Profil, deren beide Längsränder in metallischen Kanten (6) aufgenommen sind und deren Mittenabschnitt über ihre einer Kernseite (9) zugewandten Fläche mit einer Schicht (7) aus elastischem Material in Verbindung steht, dadurch gekennzeichnet, daß der Mittenabschnitt (2) der Belagplatte eine geringere Dicke (e) als die Dicke (E) ihrer in den unteren Kanten (6) aufgenommenen Seitenbereiche (3) besitzt und daß die Schicht (7) aus elastischem Material, die zwischen dem Mittenabschnitt (2) der Belagplatte und einer harten, an der Kernseite angeordneten Schicht eingefügt ist, zwischen diesen zwei Elementen zusammengedrückt wird, wobei ihre Dicke vor der Kompression größer ist als die Differenz (E - e) zwischen den beiden Dicken der Belagplatte (1).
2. Ski nach Anspruch 1, dadurch gekennzeichnet, daß die profilierte Belagplatte (2) aus extrudiertem Polyethylen ist.
3. Ski nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die elastische Schicht (7) aus einem Polyethylenschaum oder einem Kautschukschaum ist.
4. Ski nach einem der Ansprüche 1-3, dadurch gekennzeichnet, daß die Dicke (E) der beiden seitlichen Streifen (3) der Belagplatte (1) mehrfach größer als die Dicke (e) ihres Mittenabschnittes (2) ist.
5. Ski nach einem der Ansprüche 1-4, dadurch gekennzeichnet, daß die Dicke vor der Kompression der elastischen Schicht (7) mehrfach größer als die Differenz (E - e) zwischen den beiden Dicken der Belagplatte (1) ist.
6. Verfahren zur Herstellung eines Skis nach einem der Ansprüche 1-5, gekennzeichnet durch die folgenden Schritte:
Herstellen einer Belagplatte (1) durch Extrudieren von Polyethylen, welche so profiliert ist, daß sie eine ebene Grundfläche und eine Dichte aufweist, die in Querrichtung betrachtet - gegenüber dem verbleibenden Mittenabschnitt (2) deutlich an den Rändern (3) größer ist, und anschließend Herstellen des Skis durch Aufeinanderschichten mehrerer Schichten unter Druck in einer Form, wobei eine davon die profilierte Belagplatte (1) ist, welche auf dem Boden (4) der Form angeordnet und durch die beiden unteren Kanten (6) begrenzt wird, wobei eine weitere Schicht (7) aus elastischem Schaum besteht, welche wenigstens den Abschnitt (2) geringerer Dicke der Belagplatte überlagert und eine größere Dicke aufweist als die in der Belagplatte aufgrund ihrer geringeren mittleren Dicke geformte Vertiefung (E - e), und wobei eine weitere Schicht eine harte Schicht (8) ist, wie beispielsweise eine Versteifungsschicht.
EP88420168A 1987-05-27 1988-05-26 Abfahrtski und Verfahren zu seiner Herstellung Expired - Lifetime EP0294299B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88420168T ATE57310T1 (de) 1987-05-27 1988-05-26 Abfahrtski und verfahren zu seiner herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8707835 1987-05-27
FR8707835A FR2615746B1 (fr) 1987-05-27 1987-05-27 Ski de descente et procede de fabrication de ce ski

Publications (2)

Publication Number Publication Date
EP0294299A1 EP0294299A1 (de) 1988-12-07
EP0294299B1 true EP0294299B1 (de) 1990-10-10

Family

ID=9351735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88420168A Expired - Lifetime EP0294299B1 (de) 1987-05-27 1988-05-26 Abfahrtski und Verfahren zu seiner Herstellung

Country Status (4)

Country Link
EP (1) EP0294299B1 (de)
AT (1) ATE57310T1 (de)
DE (1) DE3860772D1 (de)
FR (1) FR2615746B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709673B1 (fr) * 1993-09-07 1995-10-06 Rossignol Sa Procédé pour la fabrication d'un ski en forme.
FR3105009B1 (fr) * 2019-12-24 2023-09-08 Salomon Sas Planche de glisse équipée d’un dispositif de freinage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH172764A (de) * 1934-02-24 1934-10-31 Akermann Martin Ski mit einer an einem Holzteil befestigten, aus Leichtmetall bestehenden Laufschicht.
AT310052B (de) * 1969-06-06 1973-09-10 Louis Beerli Schi
CH549393A (fr) * 1972-03-22 1974-05-31 Meyer Urs P Ski.
CH569493A5 (de) * 1972-06-08 1975-11-28 Bildner Heinz
US3790184A (en) * 1972-12-13 1974-02-05 J Bandrowski Ski construction
AT381030B (de) * 1984-07-06 1986-08-11 Amf Sport Freizeitgeraete Langlaufski

Also Published As

Publication number Publication date
DE3860772D1 (de) 1990-11-15
FR2615746A1 (fr) 1988-12-02
EP0294299A1 (de) 1988-12-07
FR2615746B1 (fr) 1990-02-16
ATE57310T1 (de) 1990-10-15

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