EP0594513B1 - Verfahren zur Herstellung eines Skis - Google Patents

Verfahren zur Herstellung eines Skis Download PDF

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Publication number
EP0594513B1
EP0594513B1 EP93420378A EP93420378A EP0594513B1 EP 0594513 B1 EP0594513 B1 EP 0594513B1 EP 93420378 A EP93420378 A EP 93420378A EP 93420378 A EP93420378 A EP 93420378A EP 0594513 B1 EP0594513 B1 EP 0594513B1
Authority
EP
European Patent Office
Prior art keywords
machining
sole
edges
unit
running
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
EP93420378A
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English (en)
French (fr)
Other versions
EP0594513A1 (de
Inventor
Jacques Fagot
Christian Paillot
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 EP0594513A1 publication Critical patent/EP0594513A1/de
Application granted granted Critical
Publication of EP0594513B1 publication Critical patent/EP0594513B1/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
    • A63C5/04—Structure of the surface thereof
    • A63C5/056—Materials for the running sole

Definitions

  • the invention relates to a new process for the manufacture and production of skis, in particular alpine skis.
  • One of the methods allowing the production of such skis consists in assembling, in particular by gluing, two sub-assemblies, respectively a first sub-assembly consisting of the gliding sole, the edges, and at least one reinforcing element, and a second sub-assembly constituted by the upper part of the ski, namely in particular a rigid shell in shape, corresponding to the external shape of the ski, possibly coated with a decoration and comprising inside the central core.
  • This bonding is carried out by any known means, either by means of a thermoplastic film as for example described in the document FR-A-2 663 237, or by means of traditional adhesive for this type of application, or by expansion in situ of the resin constituting the central core (see for example FR-A-2 654 644).
  • skis are subjected to a drive ensuring besides the effective progression of the skis at their level, also the application of pressure in the direction of said tools in order to allow a effective action of these.
  • This training is typically carried out by means of a roller, generally coated with rubber, and applying a relatively high pressure on the top of the ski.
  • skis have an upper face with a complex profile and in any case not planar, either because it has hollows, bumps, or else successive plates, even grooves or asymmetries, so that 'There is no longer a stable and constant reference surface capable of serving as a bearing surface for said roller. In this way, these differences in relief are reflected at the level of the sole, generating undulations and therefore altering the sliding properties of the ski, regardless of the number of passes at the grinding or sanding stations.
  • skis are very often pre-decorated, which implies that the machining operations of the lower surface being carried out practically at the end of the manufacturing process, a defect in crippling machining of this lower surface causes the destruction of the entire ski, thereby increasing the importance of the loss.
  • this machining phase carried out on a substantially finished ski is not satisfactory in the context of the industrialization and automation of the manufacture of skis.
  • the lower surface of an alpine ski always consists of a sole made of plastic material bordered by metal edges. This juxtaposition of materials, one hard and the other soft, makes machining by sanding or grinding very delicate because the composition of the abrasive products cannot be ideal simultaneously for each of these two materials: it can only be d '' a compromise, to the detriment of the general quality of finish of this underside, which we know the fundamental role in the context of sliding.
  • the object of the invention is to overcome these various drawbacks by proposing a method of making skis that reconciles both greater ease of automation and machining of the sole and the edges carried out under optimum conditions.
  • This method for producing a ski consisting in assembling by any known means in a shaped mold, at least two sets, respectively a first set, called the sole assembly, consisting of the gliding sole, edges and at least one mechanical reinforcement element, and a second assembly constituted by a rigid shell in shape, defining with the first assembly a space intended to receive a central core is characterized in that prior to the assembly step, the underside of the first assembly undergoes functional machining.
  • the invention no longer consists in machining in particular the sole on a finished ski, but in carrying out this phase on a sole assembly, which is rigid and flat, and which also makes it possible automate this machining phase much more easily.
  • This functional machining consists first of all of deburring and cleaning, in particular lateral of the edges, for example by scraping, in order to use this lateral face of the edges as a reference face for the subsequent machining phases; then, this first step is followed by the grinding of the sole itself and / or the base of the edge.
  • the grinding of the sole can advantageously be preceded by one or more sanding steps by means of an abrasive belt, the number of grinding and / or sanding passes being a function of the desired degree of finish.
  • this machining can be carried out continuously, using a loader containing the said first sole assemblies in the form of stacks, the said assemblies being flat, of constant thickness and the periphery of which corresponds to the dimension line of the ski.
  • the tip and the heel are bent.
  • this bending operation is carried out after the chamfering of the edge edges at the areas intended to be bent.
  • Figure 1 is a sectional view of a ski being bonded in a mold after the machining phase according to the invention.
  • Figure 2 is a partial sectional view of a detail of the sole assembly.
  • Figure 3 is a schematic representation of the setback operation of the base of the edges.
  • Figure 4 is a partial schematic representation of the sole assembly after the operation of Figure 3 and in an advantageous form with respect thereto.
  • Figure 5 is a schematic view of part of the machining line of the sole assembly, of which Figure 6 is a top view.
  • the ski is made by bonding two sets, namely a first set called “sole assembly” (1), and a second set called “shell assembly” (2).
  • the sole assembly (1) is in known manner constituted by a sliding sole (3), typically made of polyethylene, metal lateral edges (4), extending over a large part of the length of the ski, and an element mechanical reinforcement (5), typically consisting of a textile sheet pre-impregnated with a thermosetting resin, namely in particular epoxy.
  • the sole assembly (1) may also include additional reinforcing elements, such as for example a blade made of a metal alloy (ZICRAL - registered trademark), or other textile plies.
  • the shell assembly (2) comprises a rigid shell (7) in shape, for example made of a prepolymerized textile sheet, covered with a film supporting the decoration, and integrating inside the core (8), consisting of all traditional material, including polyurethane, wood, etc .
  • these two assemblies (1) and (2) are assembled together in a mold, also in shape, a film of thermosetting adhesive or of hot-melt plastic or of thermoplastic elastomer (6) being previously placed between the two sets (1) and (2).
  • the sole assembly (1) undergoes after its completion, a machining phase.
  • the various assemblies (1) produced are stored in a stack in a charger (10), said assemblies (1) having a section of constant thickness, are therefore planar, and have an outer periphery corresponding to the dimension line.
  • skiing namely in particular a reduced width at the level of the skate, which widens towards the heel and the tip.
  • This type of loader of a type known per se, makes it possible to feed the assemblies (1) one by one on a conveyor intended for conveying said assemblies at the level of the different machining stations (13, 15).
  • each assembly (1) is driven by means of a roller with horizontal axis (12), typically coated with rubber, and also ensuring the progression of the assembly at the level of said station.
  • machining also the exercise of significant pressure, in order to allow effective action of the machining tool. It is possible on such a machining line to machine several assemblies side by side, as has been shown in FIG. 6.
  • This machining consists first of all (although not shown in FIGS. 5 and 6) of proceeding to the lateral cleaning of the edges by scraping, an operation necessary to remove the burrs or drips resulting from the creep and then from the baking of the impregnation resin of the reinforcing element (5). Furthermore, it thus allows to have a reference face, particularly useful during the localized machining of the edges, as described later.
  • this particular machining of the edges consists of grinding or grinding the base (9) of the edges (4), according to a machining width L slightly greater than the effective width of the bead of said edge.
  • This grinding is traditionally carried out by means of a steel grinding wheel (20) or a diamond disc, thus making it possible to obtain a slight offset s from the base (9) of the edge, typically four hundredths of a millimeter, clean to favor the driving of the ski, since it makes it possible to reduce the errors of potential edges.
  • this setback s can form a small angle ⁇ relative to the plane of the sole, as shown in FIG. 4.
  • the precision of the dimension s for indenting the edge is guaranteed by the fact that the surface (22) is a clean reference bearing surface.
  • this surface can be sanded in the first operation.
  • the machining width L is ensured by the lateral copying of the edge shown diagrammatically by the arrow (21) in FIG. 3.
  • a sanding phase is carried out, intended to eliminate any defect in the longitudinal flatness of the sole.
  • This sanding is traditionally carried out by means of an abrasive band (13) driven in translation in the same direction as the main dimension of the sole assembly (1), and this between two deflection rollers (16), and the operational area comprises a flat pad (14) also directed in this direction, at which the sole assembly (1) is driven under pressure.
  • this sanding phase can be replaced directly by a grinding phase.
  • the bending of the tip and the heel is then carried out, bending generally carried out by means of a roller bender, capable of giving shape memory to the metal edges.
  • a roller bender capable of giving shape memory to the metal edges.
  • the edges of the edges are chamfered at the level of the tips and the heel, in order to give ease to the ski, in particular when driving in a turn.
  • This process is also particularly suitable, when the bonding of the two assemblies, sole and shell respectively, is ensured by the expansion of a polyurethane foam, acting in particular as a core.
  • a polyurethane foam acting in particular as a core.
  • the constituents of the foam are injected into the space formed between them.
  • the polymerization of the latter gives it adhesion properties, thus capable of firmly and irreversibly joining the sole assembly to the shell assembly.
  • the central core (8) consists of an independent element.
  • a heating phase capable of inducing beforehand to the polymerization of the prepreg resin of said core, its creep, so as to come to wet the two assemblies.
  • a resin in particular an epoxy, develops adhesion properties during its polymerization. This then leads, as in the previous case, to a firm and irreversible connection of the two assemblies, sole and shell respectively.

Claims (9)

  1. Verfahren zum Herstellen eines Skis, bei dem in einem Formwerkzeug mindestens zwei Baugruppen zusammengefügt werden, nämlich eine erste Baugruppe (1), die sogenannte Sohlenbaugruppe, bestehend aus der Gleitsohle (3), Kanten (4) und mindestens einem Element (5) zur mechanischen Verstärkung, sowie eine zweite Baugruppe (2), bestehend aus einer starren, geformten Schale (7), die mit der ersten Baugruppe (1) einen Raum zur Aufnahme eines inneren Kerns (8) definiert, dadurch gekennzeichnet, daß vor dem Schritt des Zusammenfügens die Unterseite der ersten Baugruppe (1) einer funktionellen Überarbeitung unterzogen wird.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die funktionelle Bearbeitung der Sohlenbaugruppe (1) besteht
    - zunächst aus einem Entgraten und Reinigen der seitlichen Oberflächen der Kanten (4);
    - alsdann aus der Durchfuhrung eines Abschleifens der Sohle (3).
  3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Abschleifen der Sohlenbaugruppe (1) nach mindestens einem Arbeitsgang eines Abschmirgelns ausgeführt wird.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Anzahl der Arbeitsgänge des Abschleifens und des Abschmirgelns in Abhängigkeit von der gewünschten Oberflächenqualität festgelegt wird.
  5. Verfahren nach einem der Ansprüche 1 - 4, dadurch gekennzeichnet, daß vor der Bearbeitung der besagten Sohleneinheit (1) diese einer örtlichen Bearbeitung der Unterseite der Kanten (4) unterzogen wird, derart, daß die Höhe des außenseitigen Abschnittes der Kante vermindert wird, so daß die Unterseiten (9) der Kanten geringfügig gegenüber der Ebene zurückgesetzt sind, die durch die Unterseite der Sohle (3) definiert ist.
  6. Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß darüber hinaus die Unterseite (9) der Kanten (4) einer zusätzlichen Bearbeitung unterzogen wird, derart, daß sie mit einer Neigung (α) relativ zur Ebene der Sohle versehen wird.
  7. Verfahren nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, daß die Bearbeitung als Fließfertigung ausgestaltet ist, wobei die Baugruppen (1) als ebene Elemente ausgebildet sind, deren Dicke konstant ist und deren Außenumfang der Maßlinie des Skis entspricht, wobei die Baugruppen mittels einer automatischen Ladestation nacheinander auf einem Förderer angeordnet werden, der die Baugruppen in den Arbeitsbereich der verschiedenen Bearbeitungsstationen mitnimmt.
  8. Verfahren nach einem der Ansprüche 1 - 7, dadurch gekennzeichnet, daß am Ende der Bearbeitung die Enden der Baugruppe (1) gebogen werden, die die Skispitze bzw. das rückwärtige Skiende bilden sollen.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß vor dem Arbeitsschritt des Biegens die Ecken der Kanten (4), die an den zu biegenden Enden liegen, angefast werden.
EP93420378A 1992-10-23 1993-09-21 Verfahren zur Herstellung eines Skis Expired - Lifetime EP0594513B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9212983 1992-10-23
FR9212983A FR2697169B1 (fr) 1992-10-23 1992-10-23 Procédé pour la fabrication d'un ski.

Publications (2)

Publication Number Publication Date
EP0594513A1 EP0594513A1 (de) 1994-04-27
EP0594513B1 true EP0594513B1 (de) 1995-11-22

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EP93420378A Expired - Lifetime EP0594513B1 (de) 1992-10-23 1993-09-21 Verfahren zur Herstellung eines Skis

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EP (1) EP0594513B1 (de)
AT (1) ATE130524T1 (de)
DE (1) DE69300862T2 (de)
FR (1) FR2697169B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9211708D0 (en) † 1992-06-03 1992-07-15 Unilever Plc Cosmetic composition

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2624028B1 (fr) * 1987-12-04 1992-09-11 Rossignol Sa Procede pour ameliorer les proprietes de glissement d'une semelle de ski en polyethylene haute densite en poudre, et de tres haut poids moleculaire
AT394679B (de) * 1990-02-09 1992-05-25 Tce Technical Coatings Enginee Hartstoffbeschichtung an kufen von wintersportgeraeten
FR2658090B1 (fr) * 1990-02-15 1992-04-30 Salomon Sa Procede d'assemblage d'un ski par surmoulage, et structure de ski obtenue par ce procede.

Also Published As

Publication number Publication date
FR2697169B1 (fr) 1994-11-18
ATE130524T1 (de) 1995-12-15
DE69300862T2 (de) 1996-04-18
FR2697169A1 (fr) 1994-04-29
DE69300862D1 (de) 1996-01-04
EP0594513A1 (de) 1994-04-27

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