WO1994006524A1 - Ski, notamment ski alpin ou ski de fond - Google Patents

Ski, notamment ski alpin ou ski de fond Download PDF

Info

Publication number
WO1994006524A1
WO1994006524A1 PCT/EP1993/002209 EP9302209W WO9406524A1 WO 1994006524 A1 WO1994006524 A1 WO 1994006524A1 EP 9302209 W EP9302209 W EP 9302209W WO 9406524 A1 WO9406524 A1 WO 9406524A1
Authority
WO
WIPO (PCT)
Prior art keywords
ski
cover film
core
filling material
pressed
Prior art date
Application number
PCT/EP1993/002209
Other languages
German (de)
English (en)
Inventor
Werner Feichtlbauer
Original Assignee
Hagan Yamaha Sport Ges.M.B.H.
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 Hagan Yamaha Sport Ges.M.B.H. filed Critical Hagan Yamaha Sport Ges.M.B.H.
Priority to EP93919093A priority Critical patent/EP0768911A1/fr
Priority to JP6507731A priority patent/JPH08501232A/ja
Publication of WO1994006524A1 publication Critical patent/WO1994006524A1/fr

Links

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
    • A63C5/12—Making thereof; Selection of particular materials

Definitions

  • the invention relates to a ski, in particular alpine or cross-country skis, consisting of a
  • Thermoplastic filling material is located between the cover film and the ski core.
  • the present invention relates to a method for producing such a ski.
  • a ski and method of the aforementioned type are known, inter alia, from EP-A-0 446 965, EP-A-0 428 886, EP-A-0 459 347, EP-A-0 461 453, DE-C-3 803 507 or DE-C-3 803 483.
  • the filler material between the cover film and the ski core is a viscous and flowable material under pressure and temperature, which material is released into the ski form when pressed Areas or voids between cover film and ski core flows and this fills out (see, inter alia, DE-C-3 803 483, column 33, lines 14-17).
  • the known construction and the known method allow the production of so-called "shell skis", which are characterized in that the cover film is half-shell-shaped over the upper flange and the two longitudinal side surfaces of the ski core, up to just above the tread or up to the lateral steel edges extends.
  • the problem with the known construction or the known method is the removal of air enclosed between the cover film and the core. Special precautions must be taken for this. Nevertheless, the inclusion of air bubbles cannot be reliably avoided, with the result that after more or less long use of the ski they become visible to the outside in the form of bulges or dents.
  • the filler material Because of the material properties of the known filler material, it is also not very possible to use the filler material to compensate for height differences within a predetermined shape between the cover film and the ski core.
  • the filling material always escapes in areas of the least resistance. Therefore, it is not well suited for the aforementioned height compensation within the mold.
  • the present invention is based on the object, based on the aforementioned prior art, of creating a ski which, because of its opening, permits a considerable reduction in the number of required forms and which is distinguished by permanent dimensional stability.
  • the present invention is based on the object of providing an efficient method for producing such a ski.
  • the invention is characterized by a so-called "ski-in-ski principle".
  • the construction according to the invention consists of an inner ski with a top flange, core, bottom flange and an outer ski with a cover film or shell, pressed and solidified hard plastic body, tread with or without steel edges.
  • the inner ski consisting of the upper flange, core and lower flange is a fixed size, while the outer ski is variable owing to the inventive hard-plastic body, ie it can be adapted to the height differences between the upper flange and the upper ski shape in the longitudinal and transverse directions of the ski. The above-mentioned height differences are compensated for within the ski shape by more or less strong compression of the hard foam body.
  • the stiffness and stiffness distribution of the ski is determined solely by the structure and dimensioning of the ski core.
  • the aforementioned outer ski is therefore primarily used only for the outer shape of the entire ski, without having a strong influence on the physical properties of the ski, such as rigidity, etc.
  • an originally up to 80% open-pore hard foam (TPU) is used as the filling material enables the aforementioned pressing without flowing away to the side.
  • the open pores collapse under the pressure within the ski shape, primarily in the direction of pressure.
  • the permanent solidification of the compressed foam is obtained by impregnating the same with adhesive, in particular the usual epoxy adhesive.
  • the up to 80% open-pore foam body, in particular hard foam body is coated on all sides with epoxy adhesive. This penetrates into the open pores of the plastic body, in particular under the pressures and temperatures applied within the ski shape.
  • the foam body is literally impregnated with epoxy adhesive.
  • the adhesive hardens, the pressed foam body is correspondingly hardened with simultaneous connection of the same to the ski core or upper flange on the one hand and to the half-shell-shaped cover film on the other hand.
  • any air pockets between the cover film and the ski core are also absorbed by the still open pores of the foam body, without these air pockets showing any external effect.
  • the open porosity of the foam used according to the invention is therefore extremely advantageous both for the penetration of adhesive and for the absorption of enclosed air. No special precautions have to be taken for the escape of air from the area between the cover film and the ski core. in the Otherwise, the escape of air is additionally facilitated by the fact that the cover film, in contrast to the process according to DE-C-3 803 483, is assigned to the upper and not the lower mold.
  • the adhesive is preferably applied to the foam body in an amount of approximately 80 to 200 g / m 2 .
  • the ski according to the invention can be made with considerably fewer ski shapes than in the prior art.
  • the open porosity of at least about 60%, preferably up to 80%, according to the invention prevents the filling material from escaping laterally during the pressing. Rather, the high degree of open porosity means that the filling material is literally folded together in itself or collapses in itself, primarily in the printing direction. Therefore, it is also not necessary to calculate or provide lateral free spaces for displaced filler volume, as is the case with the prior art.
  • a filler block consisting of a thermoformable hard urethane and / or isocyanurate groups is preferably used as the filler material with a density of over 100 kg / m 3 .
  • Aliphatic, cycloaliphatic, aromatic and heterocyclic serve as starting compounds for such foams Polyisocyanates or mixtures thereof.
  • Suitable isocyanates are, for example, 1,4-tetramethylene diisocyanate, 1,12-dodecandyocyanate, cyclobutene-1,7-diisocyanate, phenylene diisocyanates, tolylene diisocyanates, diphenylethane diisocyanates, diphenyl methane diisocyanates, naphthylene diisocyanate diisocyanate diisocyanate, hexane diisocyanate, groups, urethane groups, isocyanurate groups, urea groups, allophanate groups or biuret groups.
  • Preferred isocyanates such as 2,4- and / or 2,6-tolylene diisocyanate, 4,4 'and / or 2,4-diphenylmethane diisocyanate, and modified isocyanates derived therefrom are used.
  • Mixtures of at least hydroxyl-containing polyethers and polyesters with a molecular weight of 400-10,000 are used as further starting compounds. Mixtures with an OH number of at least 400 are preferred.
  • All customary catalysts can be used as catalysts for the polyaddition reaction, for example organometallic compounds such as tin octanoate, dimethyltin laurate, dibutyltin laurate, dibutyltin acetate, lead oleate, vanadium pentoxides or mixtures thereof, tertiary amines such as triethylene diamine, dimethylhexamine, triethylamine, triethylamine -Ethyl-piperidine, tetra ethyltetramethylene diamine or mixtures thereof.
  • organometallic compounds such as tin octanoate, dimethyltin laurate, dibutyltin laurate, dibutyltin acetate, lead oleate, vanadium pentoxides or mixtures thereof
  • tertiary amines such as triethylene diamine, dimethylhexamine, triethylamine, triethylamine
  • the polyurethane foam can contain conventional additives such as chain extenders and / or crosslinking agents, reaction retarders such as acidic substances such as H 3 PO 4 surface-active substances such as emulsifiers, foam stabilizers, dyes and fillers, etc. contain.
  • reaction retarders such as acidic substances such as H 3 PO 4 surface-active substances such as emulsifiers, foam stabilizers, dyes and fillers, etc. contain.
  • the foam material can be produced, for example, by a one-step process, a prepolymer process or a semi-prepolymer process and then processed further.
  • TPU thermoplastic polyurethane
  • the foam blocks produced with a foam height of about 12 cm are cut for use according to the invention by means of saws, to the desired width and length.
  • the board-like strips cut in this way are placed within the ski shape in accordance with claim 8. They can be brought to a temperature of about 200 ° C. in advance for about 10 minutes, either by application of infrared radiators or by storage in a heating cabinet or
  • the strips heated to this temperature can then immediately be placed in the ski form and pressed within the ski form with the specified pressure of 6-12 bar, possibly up to 15 bar.
  • the pressing time inside the mold is about 5 - 10 minutes at a temperature of 80 to 140 ° C.
  • FIGS. 1 and 2 schematically showing two different phases of the production process in cross section. Accordingly, a ski core 1, which is approximately trapezoidal in cross section, together with the upper flange 3, lower flange 2, tread 4 and steel edges 5 is placed in a lower mold 11.
  • This hard foam layer or strip is previously coated on all sides with an adhesive 13, in particular epoxy adhesive.
  • the cover film has the reference number 6.
  • the mold cavity 14 of which determines the upper side including the side cheeks of the ski to be produced the cover sheet 6 is pressed under compression of the foam material layer 9 over the ski core 1 under close contact with the upper side and the two long sides of the ski core, the lower and upper molds remaining in the corresponding relative position until a permanent connection between the cover sheet and Ski core is preserved.
  • the upper mold 12 such a high pressure is exerted on the ski core via the cover film that the foam layer arranged between cover film 6 and ski core 1 or top flange 3 is pressed to a thickness which is about 60%, preferably up to 20% of the original Thickness corresponds (see Fig. 2).
  • the foam layer 9 is pressed under a pressure of about 6-12 bar, preferably up to 15 bar, and a temperature of about 80-140 ° C., preferably up to 160 ° C., over a period of about 5 - 20, especially about 10 minutes.
  • any voids 10 between the cover film 6 and the two side surfaces of the ski core 1 are filled with the adhesive 13.
  • practically no foam material 9 escapes into these cavities.
  • the cavities 10 are only very slight or narrow Gaps that can only absorb excess glue 13 anyway.
  • a large part of the adhesive penetrates into the open pores of the foam strip 9, so that it is permanently solidified after compression and heat curing.
  • the cover film 6 is dimensioned such that it extends in a half-shell shape over the upper flange 3 and the two longitudinal side faces 7, 8 of the ski core 1 to just above the tread or up to the side steel edges 5.
  • the cover film 6 preferably has a thickness of approximately 0.5-1.2 mm, in particular approximately 0.9 mm.
  • the filler layer between the cover film and the ski core is practically non-porous.
  • the still existing pores serve to absorb trapped air, so that this no longer has any external effect.
  • the hard foam strip extends essentially over the entire length of the ski. It can be pressed differently over the length and width of the ski depending on the dimensioning of the ski core 1 and / or the ski shape 11, 12. Also locally different pressings are possible with the formation of surface structures. The rigidity of the ski over its length can also be set within certain limits by different pressing in the longitudinal direction of the ski.

Landscapes

  • Laminated Bodies (AREA)

Abstract

L'invention concerne un ski, notamment un ski alpin ou un ski de fond, qui comprend un noyau (1), une semelle inférieure (2), une semelle supérieure (3), un revêtement favorisant la glisse (4) situé sous la semelle inférieure, avec ou sans carre(s) en acier (5), ainsi qu'une feuille de recouvrement qui s'étend sous forme semi-monocoque sur la semelle supérieure (3) et les deux surfaces latérales longitudinales (7, 8) du noyau du ski (1), pratiquement jusque sur le dessus de la surface de glisse ou jusqu'aux carres latérales en acier (5). Un matériau de remplissage thermoplastique se trouve entre la feuille de recouvrement (6) et le noyau du ski (1). On utilise comme matériau de remplissage thermoplastique (9) une mousse rigide de polyuréthane ayant à l'origine jusqu'à 80 % d'alvéoles, qui peut subir une compression permanente à une pression de 6 à 12 bar et à une température comprise entre 80 et 140 °C dans le sens de compression. Le matériau de remplissage (9) est de préférence une bande en mousse rigide qui subit une compression permanente entre la feuille de recouvrement (6) et la semelle supérieure (3). La consolidation s'opère à l'aide de colles pénétrant dans les alvéoles du corps en mousse et durcissant à chaud.
PCT/EP1993/002209 1992-09-15 1993-08-18 Ski, notamment ski alpin ou ski de fond WO1994006524A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP93919093A EP0768911A1 (fr) 1992-09-15 1993-08-18 Ski, notamment ski alpin ou ski de fond
JP6507731A JPH08501232A (ja) 1992-09-15 1993-08-18 スキー、特にアルペン用スキー又はクロス・カントリー用スキー

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4230846.1 1992-09-15
DE4230846 1992-09-15

Publications (1)

Publication Number Publication Date
WO1994006524A1 true WO1994006524A1 (fr) 1994-03-31

Family

ID=6468005

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/002209 WO1994006524A1 (fr) 1992-09-15 1993-08-18 Ski, notamment ski alpin ou ski de fond

Country Status (3)

Country Link
EP (1) EP0768911A1 (fr)
JP (1) JPH08501232A (fr)
WO (1) WO1994006524A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2804611A1 (fr) * 2000-02-03 2001-08-10 Rossignol Sa Procede de fabrication d'une planche de glisse sur neige, dont la surface externe, inferieure ou superieure, comporte des parties en relief

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4993740A (en) * 1988-03-29 1991-02-19 Salomon S.A. Process for forming a ski, and a ski formed according to the process
DE3803507C2 (fr) * 1987-02-27 1991-11-07 Salomon S.A., Pringy, Fr
EP0459347A1 (fr) * 1990-06-01 1991-12-04 Salomon S.A. Ski et éléments de ski
DE4130110A1 (de) * 1990-09-27 1992-04-02 Rohrmoser Alois Skifabrik Ski mit einer raeumlich profilierten oberseite
EP0498963A1 (fr) * 1991-02-14 1992-08-19 Salomon S.A. Ski alpin destiné à glisser sur la neige et la glace

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3803507C2 (fr) * 1987-02-27 1991-11-07 Salomon S.A., Pringy, Fr
US4993740A (en) * 1988-03-29 1991-02-19 Salomon S.A. Process for forming a ski, and a ski formed according to the process
EP0459347A1 (fr) * 1990-06-01 1991-12-04 Salomon S.A. Ski et éléments de ski
DE4130110A1 (de) * 1990-09-27 1992-04-02 Rohrmoser Alois Skifabrik Ski mit einer raeumlich profilierten oberseite
EP0498963A1 (fr) * 1991-02-14 1992-08-19 Salomon S.A. Ski alpin destiné à glisser sur la neige et la glace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2804611A1 (fr) * 2000-02-03 2001-08-10 Rossignol Sa Procede de fabrication d'une planche de glisse sur neige, dont la surface externe, inferieure ou superieure, comporte des parties en relief

Also Published As

Publication number Publication date
JPH08501232A (ja) 1996-02-13
EP0768911A1 (fr) 1997-04-23

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