FR2851174A1 - SNOWBOARD ON SNOW WITH OUTER FACE COMPRISING A TRANSPARENT PROTECTIVE FILM AND METHOD FOR PRODUCING THE SAME - Google Patents

Abstract

A board for gliding on snow (1) comprises in particular an outer face (6) formed of an upper decoration and protection assembly, said upper decoration and protection assembly being covered with at least one film of varnish at least on its outer surface (6) .The film or films of varnish form a set of bumps (21, 22) projecting over all or part of the outer face (6) of the board for gliding on snow (1).

Description

SNOWBOARD ON SNOW EXTERIOR FACE COMPRISING

  The present invention relates to a snow gliding board with an external face comprising a transparent protective film. The invention also relates to a method for producing a snow gliding board having an outer protective film.

  The finishing of the outer face is an important phase in the manufacture of a snow gliding board, such as an alpine ski, a surf, a monoski, a ski touring, a cross-country ski, ... upper decoration and protection assembly, intended to provide both decoration and superior protection of the board, must be of high quality, durable, resistant to external aggressions and inexpensive. This set must indeed resist scratches, UJV, low temperatures, humidity, cleaning solvents, ...

  In addition to decorations obtained thanks to different types of colors and pigmentations, efforts have focused on achieving particularly attractive optical effects 20 at the outer face of the gliding board and its upper set of decoration and protection. .

  STATE OF THE ART A first current technique is known for creating decorations at level 25 of the outside face of a gliding board which consists in providing in the part of the injection mold, corresponding to the upper set of decoration and protection, cavities and / or growths. During the injection or molding of the board, the upper assembly will conform very exactly to these cavities and / or protuberances.

  However, depending on whether it is a molding or injection operation and depending on the choice of materials constituting the upper assembly and the thickness of this assembly, it is not possible to obtain any relief on the outside of the board. In addition, this technique is particularly costly, since engraving the mold is an extremely precise operation. The mold is paid for only after a large series of injection or molding. In addition, such a mold is very difficult to clean in the event of glue or injection foam burrs.

  Gliding boards are also known which comprise on their outer face a decoration having slight reliefs obtained by insertion into the mold of an insert in the form of a honeycomb sheet of polymer material coming to be pressed onto and secured to the upper set of decoration and protection.

  However, such a production method requires precise positioning of the insert. However, such a positioning of the part will take time and slow down the production chain of the skis. In addition, the patch is lost, resulting in production overload.

  Other methods make it possible to obtain a granular appearance of the external face of a gliding board, in particular in the final stage of production, by depositing on the upper decoration and protection assembly of the board a layer of lacquer or varnish containing fillers made up of particles or lumps.

  However, the aesthetic effect obtained with the very fine asperities is not the one that will catch the eye of the end user the most. The size of the lumps is limited, resulting in a fairly fine grainy appearance. Finally, in these methods, the application of the lacquer layer can only be done with a few specific machines, for example curtain machines, excluding the possibility of using a spray.

  SUMMARY OF THE INVENTION A first problem which the invention proposes to solve is to obtain a decorated outer face which makes the board for gliding on snow particularly attractive. A second problem is to create evocative reliefs which can recall the primary function of the board which is to be used on snowy, cold and / or icy slopes. A third problem is to succeed in presenting a board for gliding on snow with an even reinforced outer face. A fourth problem is the development of an economical process for producing a board for gliding on snow incorporating final decoration steps carried out after molding or injection.

  A board for gliding over snow comprises in particular an outer face formed by an upper decoration and protection assembly, said upper decoration and protection assembly being covered with at least one film of varnish at least on its external surface.

  According to a first aspect of the present invention, the varnish film or films form a set of bumps protruding over all or part of the outer face of the snow gliding board.

  In other words, the bumps are only created by the varnish or varnishes used.

  The term “outer face of the board for sliding on snow and the outer surface of the upper decoration and protection assembly 10” means the upper areas, that is to say facing upwards, but which may or may not include the side edges and / or the edges.

  Very preferably, the set of bumps can achieve on the outer face of the snow gliding board an apparent decoration in relief having an appearance of 15 drops and / or drips. These drops, droplets and / or these drips, drips can very dramatically give a freezing effect of a liquid sprayed and / or having flowed on this outer face of this board for sliding on snow.

  With such an external face, the user will have the impression that his board slides out of the freezer. A corresponding, quite analogous image is that of a cocktail glass with icing obtained at the rim.

  The bumps, belonging to the set of bumps, can favorably be distributed randomly over all or part of the outer face of the snow gliding board. The bumps, belonging to the set of bumps, can have a height substantially between 0.2 mm and 1.2 mm. Preferably, this height 25 can be substantially equal to 0.5 mm. The set of drop-shaped bumps can have a number of bumps substantially between 200 / dm2 and 2000 / dm2.

  The varnish film or films covering the upper decoration and protection assembly may be transparent or translucent, so as to reveal the decoration of said upper decoration and protection assembly. According to a second aspect of the present invention, a method for producing a snow gliding board, comprising in particular an outer face formed by an upper decoration and protection assembly, by molding or by injection, further comprises the final stages of: - preparation of the external surface of the upper decoration and protection assembly; - Application to the prepared external surface of the upper decoration and protection assembly of a first regular film of a varnish based on oligomers and acrylate monomers hardening under UV radiation, having a dry extract substantially between 90 and 100; curing the first film under UV radiation with a radiated energy substantially between 0.5 J / cm2 and 1.5 J / cm2; - Application by spraying onto the first hardened film of a second film of a thickness substantially between 20 μm and 120 μm, of a varnish based on oligomers and acrylate monomers hardening under UV radiation, having a dry extract substantially between 90 and 100; and - curing the second film under UV radiation with a radiated energy substantially between 1.5 J / cm2 and 2 J / cm2; so as to obtain a set of bumps protruding over all or part of the outer face of the snow gliding board.

  In other words, with the process, the exterior face is reinforced while creating attractive reliefs. The step of preparing the external surface of the upper decoration and protection assembly can advantageously be carried out by an embossing or sanding operation. The varnish based on oligomers and acrylate monomers curing under UV radiation of the first and second film may be a varnish chosen from the group comprising, alone or as a mixture, the urethane-acrylate, epoxy-acrylate, acrylic-acrylate and polyester acrylate.

  The thickness of the second film can be substantially equal to 40 JIm, as an example of embodiment. In a first alternative, the drips can be obtained at the spatula due to its upward inclination. In a second alternative, it is possible to insert a step for holding the snow gliding board vertically, between the step of applying the second film and the step of hardening the second film under UV radiation, so as to obtaining bumps in the form of runouts substantially over the entire length of the gliding board.

  One can favorably interpose a step of decorating the outer surface of the upper decoration and protection assembly, which can be placed between the step of preparing this outer surface of the upper decoration and protection assembly and the first film application step.

Brief description of the figures

  The invention will be clearly understood and its various advantages and different characteristics will emerge more clearly from the following description, from the nonlimiting exemplary embodiment, with reference to the appended schematic drawings, in which: - Figure 1 represents a synoptic view of the different final stages of the production method according to the invention of a board for gliding on snow; - Figure 2 shows an enlargement of detail A of Figure 1, showing in perspective the tip of a first alternative embodiment of a snow gliding board according to the invention; and - Figure 3 shows an enlargement of detail B in Figure 1, showing in perspective the heel area of a second alternative embodiment of a board for gliding on snow according to the invention.

  Detailed description of the invention

  A classic type of snow gliding board, such as an alpine ski (1) comprises a front zone with a tip (2), a rear zone with a heel lift (3), a central zone called the skate zone ( 4), two lateral edges (5), an outer face (6) formed by an upper protection and decoration assembly and a lower face forming the gliding sole (7) delimited on either side by the two edges side (5).

  A method of making the ski (1) commonly used begins with the various conventional steps, of positioning the various component parts in a mold for a molding or injection operation of polyurethane foam, not described and not shown. The ski (8) is then machined on all its 30 faces, but not yet decorated.

  According to the method of the invention, the production of the ski (1) continues by the preparation of its outer face (9). This preparation comprises different stages (I to V) for forming the external face (6) of the upper decoration and protection assembly.

  In a first step (I), we start by preparing the outer surface (9) of the upper decoration and protection assembly by a sanding operation. This sanding is carried out by abrasive belt machines, grinders or brushing tools (11). Thanks to this sanding, an external surface (12) of the upper decoration and protection assembly is obtained, with a roughness ready to undergo the subsequent stages.

  At this level, one can insert a step (not shown) of decoration by screen printing or pad printing of the outer surface (12) of the upper decoration and protection assembly.

  In a second step (II), a first regular film of a varnish based on oligomers and acrylate monomers curing under UV radiation is applied to the sanded outer surface (12) of the upper decoration and protection assembly. given good results, the varnish is, for example, a polyurethane-acrylate, sold by the company Celliose, under the name Celluve and the reference 3721 LX. This varnish has a dry extract substantially between 90 and 100.

  This application is carried out by a curtain machine (13) or by spraying.

  Other devices for applying the first varnish film may be used. For example, the first film (14) has a thickness substantially between 20 60 Ulm and 100 Ulm, and preferably equal to 70 1tm.

  In a third step (III), the first film (14) is partially hardened by subjecting the outer surface under UV radiation. A UV tunnel from the company Giardina (16) delivers, for example, substantially equal radiated energy. at 0.5 J / cm2. The radiated energy is measured by a 1JVIMAP detector from the company EIT. An outer surface (17) of the upper decoration and protection assembly is obtained, the first varnish film of which is crosslinked and hardened. The outer surface (17) is ready to undergo the subsequent steps.

  In a fourth step (IV), a second film of a varnish based on oligomers and acrylate monomers curing under UV radiation is sprayed onto the exterior surface with the first cured film (17). , the varnish is, for example, a polyurethane-acrylate, sold by the company Celliose, under the name Celluve and the reference 3721 LX. This varnish has a dry extract substantially between 90 and 100.

  This application is carried out by spraying (18) or spraying. Other devices for applying the second varnish film (19) by spraying may be used. By way of example, the second film (19) has a thickness substantially equal to 40 μm, before it shrinks in the form of bumps.

  In a fifth step (V), the second film (19) is hardened by subjecting the outer surface to UV radiation. A tunnel from the company Giardina (16) delivers, for example, a radiated energy substantially equal to 1 , 5 J / cm2.

  The radiated energy is measured by a UVIMAP detector from the company EIT.

  The outer face (6) of the upper decoration and protection assembly is obtained, the second varnish film (19) of which is crosslinked and hardened. The two varnish films (14 and 19) covering the upper decoration and protection assembly are transparent or translucent, so as to reveal the decoration, for example pigmentation, carried out before injection for the upper decoration and protection assembly . At the exit of the UV tunnel, the decorated ski (1) is finished and has raised bumps 1 5 (2 1 and 22) obtained by localized withdrawals from the second varnish film (19).

  According to the invention, and in a first variant embodiment (see FIG. 2), the second and last varnish film covering the upper protection and decoration assembly forms a set of drips (21), projecting from a part of the outer face (6) corresponding to the spatula (2). These drips (21) are distributed randomly at the level of the spatula (2).

  These drips (21) have a height substantially equal to 0.5 mm and a length substantially between 50 mm and 300 mm, preferably substantially equal to 100 mm. The number of drips (21) is substantially between 5 / dm2 and / dm2, preferably substantially equal to 10 / dm2.

  In a first alternative of this first alternative embodiment, the drips (21) are obtained only at the level of the tip (2) due to its natural inclination raised upward relative to the rest of the ski (1).

  In a second alternative of this first alternative embodiment, the drips (21) are obtained substantially over the entire length of the ski (1). For this second alternative, the ski (1) is maintained with its heel (3) oriented downwards, preferably substantially vertically, for a few seconds, between the spraying step (IV) of the second film (19) and the 'step (V). The length of the drips (21) will depend on the time the ski (21) is held vertically, before the final hardening.

  According to the invention, and in a second variant embodiment (see FIG. 3), the second and last varnish film covering the upper protection and decoration assembly forms a set of droplets (22), projecting over the whole of the outer face (6).

  These droplets (22) have a height substantially equal to 0.5 mm and a diameter substantially between 1 mm and 8 mm, preferably substantially equal to 3 mm. The number of droplets (22) is substantially between 200 / dm2 and 2000 / dm2, preferably substantially equal to 500 / dm2.

  The present invention is not limited to the embodiments described and illustrated. Many modifications can be made without departing from the framework defined by the scope of the set of claims.

  All decoration possibilities remain accessible. The outer face (6) of the same board for sliding on snow (1) may comprise only runnings 15 (21) or only droplets (22), or simultaneously runnings (21) and droplets (22). All the zones of presence or absence of drips (21) and / or droplets (22) on the external face (6) of the same board for gliding on snow (1) may. be considered according to the wishes of the manufacturer.

Claims (12)

  1. Snow gliding board comprising in particular an outer face (6) formed of an upper decoration and protection assembly, said upper decoration and protection assembly being covered with at least one film of varnish at least on its outer surface, characterized in that the varnish film or films (19) form a set of bumps (21, 22) projecting over all or part of the outer face (6) of the snow gliding board (1). 10 2. Snow gliding board according to claim 1, characterized in that the set of bumps produces on the outer face (6) of the snow gliding board (1) an apparent decoration in relief having an aspect of drops ( 22) or drips (21), giving the impression of freezing of a sprayed liquid and / or having flowed onto said outer face (6) of said snow gliding board (1).   3. Snow gliding board claim 1 or 2, characterized in that the bumps (21, 22), belonging to the set of bumps, are distributed randomly over all or part of the outer face (6) of the board for gliding on 20 snow (1).   4. Snow gliding board according to one of the preceding claims, characterized in that the bumps (21, 22), belonging to the set of bumps, have a height substantially between 0.2 mm and 1.2 mm , preferably substantially equal to 0.5 mm.   5. Snow gliding board according to one of the preceding claims, characterized in that the set of bumps has a number of bumps (21, 22) substantially between 200 / dm2 and 2000 / dm2.   6. Snow gliding board according to one of the preceding claims, characterized in that the varnish film or films (14, 19) covering the upper decoration and protection assembly are transparent or translucent, so as to reveal the decoration of said upper decoration and protection assembly.   7. A method of making a board for sliding on snow (1), comprising in particular an outer face (6) formed of an upper decoration and protection assembly, by molding or by injection, characterized in that it comprises in 1 O in addition to the final stages of: preparation (I) of the external surface (9) of the upper decoration and protection assembly; - Application (II) on the prepared external surface (12) of the upper decoration and protection assembly of a first regular film (14) of a varnish based on oligomers and acrylate monomers curing under radiation UV, having a dry extract substantially between 90 and 100; - Curing (III) of the first film (14) under UV radiation with a radiated energy substantially between 0.5 J / cm2 and 1.5 J / cm2; application (IV) by spraying onto the first hardened film (17) a second film (19) of a thickness substantially between 20 μm and 120 μm, of a varnish based on oligomers and acrylate monomers hardening under UV radiation, having a dry extract substantially between and 100; - hardening (V) of the second film (19) under UV radiation with a radiated energy substantially between 1.5 J / cm2 and 2 J / cm2 so as to obtain a set of bumps (21, 22) projecting over all or part of the outer face (6) of the snow gliding board (1).   8. Method according to claim 7, characterized in that the step of preparation (I) of the outer surface (9) of the upper decoration and protection assembly is done by a graining or sanding operation.   9. Method according to claim 7 or 8, characterized in that the varnish based on oligomers and acrylate monomers curing under UV radiation of the first (14) and of the second film (19) is a varnish chosen from the group comprising, alone or as a mixture, urethane-acrylate, epoxy-acrylate, acrylic-acrylate and polyester-acrylate varnishes.   10. Method according to one of claims 7 to 9, characterized in that the thickness of the second film (19) is substantially equal to 40 gim.   11. Method according to one of claims 7 to 10, characterized in that a step of maintaining the snow gliding board (1) is inserted vertically, between the application step (IV) of the second film (19) and the step of hardening (V) of the second film (19) under UV radiation, so as to obtain bumps in the form of drips substantially over the entire length of the gliding board.   12. Method according to one of claims 7 to 11, characterized in that a step of decorating the exterior surface of the upper decoration and protection assembly is inserted, between the step of preparation (I) of said outer surface 20 of the upper decoration and protection assembly and the application step (II) of the first film (14). Submitter: SKIS ROSSIGNOL S.A.   Agent: LAURENT & CHARRAS Cabinet