DE2337936A1 - Ski with glass-fibre laminate reinforcement layer - has side-edges of layer and of core coinciding - Google Patents

Abstract

The reinforcement layer is spread at the wider parts of the ski, i.e. those facing its narrowest part, so that the side edges of the layer and those of the core coincide. The core can be made of wood or plastic. The reinforcement at the edges is obtained without loss of material and a box-effect is achieved, in the case of two reinforcement layerS, in the above-mentioned wider parts of the ski. The layer continuously extends up to the edges, in the narrow part of the ski, while it is present at the side edges at least, within the wider ranges, which is essential for obtaining a box-effect.

Description

Krauss-Maffal TK 188 Aktiengesellschaft., Munich 50 Z 0 0 / Ό 3 C;

Ski with reinforcement layer and process su its manufacture

The invention relates to a ski with a core and with at least one strip-like, preferably one Glass fiber laainat existing reinforcement layer, in particular a plastic ski, and a method for Manufacture of the ski.

In such skis are on a wedge core made of wood or plastic on the bottom «- and top in the corresponding Size pre-made fiberglass laminates glued. The sole or surface covering is then applied to this as a running surface or cover sheet. in the In the process, the following manufacturing methods have emerged for some of them

Glass fiber laminate strips of the width of the largest core width are applied in accordance with the Core shape cut and then glued. But it is also possible to use fiberglass laminate strips of the width to glue the largest core width and then work off the strutting parts. The disadvantage of these two

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the manufacturing methods is that the waste of fiberglass laminate is significant. Assuming that skis have a width of 68-70 mm in the middle, but a width of 86-90 mm at the front, the laminate strips have to be somewhat oversized for processing and the narrow central area is only about 400 mm long a material loss of about 25 i "into existence. The material used as a reinforcement layer is, on the one hand, relatively expensive and, on the other hand, difficult to work with after gluing (with hard metal tools).

In a further production method, laminate strips with a constant width of about 50 to 60 mm are made in one Glued groove or recess provided in the ski core. There is no loss of material here. The disadvantage here, however, is that not only the strength achievable by the reinforcing layer is in the middle Area is smaller than with the other production methods (which if necessary by a wider strip could be compensated), but that in the broader core areas, namely front and rear, the Torsional strength of the core leaves something to be desired, because in these areas on both sides of the strip about 15 mm wide parts remain without a reinforcement layer have to. This is very disadvantageous, especially on the front part of the ski. It goes through the otherwise through the lower and

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upper reinforcement layer achievable so-called box effect lost.

The invention is based on the object without loss of material an edge reinforcement and in the case of two reinforcement layers the box effect increases in the areas of the core that are wider than the narrowest area achieve. This task is desired in a ski of the type mentioned in that the reinforcement layer is formed spread wider than the narrowest point of the ski, namely such that the side edges of the reinforcement layer match the side edges of the core. The inventive Ski has the advantage that the reinforcing layer is uninterrupted in the narrow area extends up to the edges and in the wider areas in each case on the side edges the reinforcement layer is present, which is essential for a caste effect, while the partially missing reinforcement layer t is negligible in the middle zone of these end areas, because their influence on the box effect is low.

It is already known that the ski core is spread apart at the front and rear ends of the ski, with this expansion is made possible either by means of an incision or on two adjacent ski components

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len is carried out with the help of expanding bars However, this measure does not affect the reinforcement layer there and also does not pursue the purpose of to prevent material waste, as there expressly the measure of spreading the ski components and working from the full ski component are presented as equivalent.

According to a further development of the invention, the core and / or the surface and sole layer that may be present are used (Cover sheet and tread of the ski) so ausgebil det that the spread areas of the reinforcement layer are filled out. Here, the core or the surface and sole layer points in the direction of the reinforcement layer protruding in the thickness of the tipping or wedge areas, which in the interstices of the Reinforcement layer come to rest. This measure serves not only to increase strength, but also better fixing the position of the reinforcement layer.

Provided a single strip track for each reinforcement layer Is used, it must be provided with longitudinal cuts at the relevant points. To this measure to avoid, several strips are expediently corresponding to the intended spreading areas tracks provided for the reinforcement layer.

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The method of manufacturing such skis consists in using a single strip strip as a reinforcement material in that a width is chosen for the strip-like reinforcing layer which is the same the cutest point of the core, that further at the points the reinforcement layer after fixing comes to lie on the core in wider areas, longitudinal cuts (cut parts) are incorporated, that then the reinforcement thing spreading the Interfaces are placed on the core in such a way that its side edges coincide with those of the reinforcement layer, and that the attachment then takes place on the core.

If the pretreatment of the reinforcement layer (longitudinal cuts) is to be avoided, it is advantageous that for the reinforcement layer two, preferably the same wide strip strips are used, which together give the width of the core at its narrowest point, that further the strip webs are placed on the core and attached to it that the outer side edges of the strip strips come to rest on the side edges of the core. Shall the distances between the strip strips are kept small, it is recommended that three or more, preferably equally wide strip strips are used and that the mutual spacing of the strip webs at the wider points of the

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Kerns are each equal to each other.

The invention is illustrated in the drawing using several examples. Here shows - essentially in schematic representation -

F5.iT: 1 a ski in a side view, Fig * 2 the same from above,

3 and 4 show a cross section through the ski along the line III-III and IV-IV in FIG. 2,

Fig * 5 and 6 two more skis in a plan view the reinforcement layer (after removing the cover sheet) and

FIG. 7 shows a cross section through the ski according to FIG. 6 accordingly the line VII-VII.

In Figs. 1 to 4, 1 denotes a ski which is shown in Fi ... 1 in a side view, which is not yet Reveals details, in particular not the layer structure. The latter can clearly be seen in FIGS. 3 and 4. Thereafter, the thickest layer is the core 2, the underside of which is three in the longitudinal direction Has recesses 3. A reinforcing layer 4 is glued to the top of the core 2, on which in turn a cover sheet 5 is applied, the reinforced side edges 6 of which in recesses on the reinforcement layer 4 intervene. On the bottom of the core 2 is first

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another reinforcement layer 7 and then the tread 8 fastened «Between these are steel edges on both sides 9 inserted.

It can be seen from FIG. 2 that the ski is narrowest in the region of the interface III-XII. The ski widens at both the front and the rear end. The reinforcement layers 4 and 7, before they are attached to the core 2, each consist of a single sheet the width of the narrowest point at III-III. In the wider areas, these tracks are cut twice at points and 11, so that three partial tracks are created in the cut area! the two outer partial webs in each case are offset outward before the cover sheet 5 or the running surface 8 is placed on, so that the outer edges of these partial webs come to rest on the outer edges of the core 2. Thus, the outer partial webs to touchdown of the cover sheet β 5 and the tread and then taking place Gesamtverklebung remain in position, they can by means of small ^(screws or staples can be easily attached. On the staggered locations of the partial webs are formed cavities 12 (Fig. H ).

Fig. 5 shows the use of three strip strips 13 to 15 to form the reinforcement layer. The width of the three strip tracks 13 to 15 taken together results in the Core width at the narrowest point of the ski. The middle

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Are laid Streifenbahu \ h pulls calibrated in a straight line through the entire ski passes, the outer strip webs 13 and 15 while at the wider points dee ski outwardly * so that the edge of said strip is located on the edge of the nuclei.

The execution according to FIGS. 6 and 7 provides only two strip webs 16 and 17, which are attached to the wider Positions of the ski, namely front and rear »are arranged at a lateral distance so that edge on edge lies. As can be seen from FIG. 7, however, the cavities 18 and 19 formed are filled, and although in the upper half of a rib 20 in the core and in the lower half of a rib 22 in the Tread 23.

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$ 509807/008

Claims (1)

Claim 1 «J ski has a core and at least one strip-like reinforcing layer, preferably consisting of a glass fiber laminate, in particular plastic ski, characterized in that the reinforcing layer (k, 7) is wider than the narrowest part of the ski (1) Places is formed spread, in such a way that the side edges of the reinforcement layer coincide with the side edges of the core (2 and 21). 2. Ski according to claim 1, characterized in that the core (21) and / or the possibly existing surface and sole layer (tread 23) is formed so that the splayed areas (cavity 18, 19) of the Reinforcement layer (16, 17) are filled (ribs 20, 22). 3 «ski according to claim 1 or 2, characterized in that the reinforcement chi clit according to the intended Spreading areas from several strip strips (13 to 15 or 16, 17). k. A method of manufacturing a ski according to claim 1 509807 / 008S - 10 - or 2, using a core and aumindeat of a strip-like reinforcement layer, which is attached to the core, preferably by gluing, characterized in that a width is selected for the strip-like reinforcement layer (k _t 7) which is equal to the narrowest point of the Core (2), that furthermore, longitudinal cuts (interfaces 10, 11) are incorporated at the points of the reinforcement layer that come to lie on wider areas after fastening on the core, so that the reinforcement layer is then spread over the Core is placed so that its side edges match those of the reinforcement layer, and that the attachment then takes place on the core. 5. The method according to claim k _f, characterized in that the reinforcement layer is cut into strips of equal widths in the transverse direction of the ski. 6. A method for producing a ski according to claim 3 »using a core and at least one strip-like reinforcement layer that is placed on the Core is preferably attached by gluing, characterized in that for the »reinforcement» layer two, preferably equally wide strip webs (16, 17) are used »dt © together the 50980 7 / Ü 0 8 b - 11 -. Width of the core (21) at a narrowest point result in that furthermore the strip tracks so on the Core placed and attached to this that the kissing rare edges of the striped strips come to rest on the side edges of the core. 7. The method according to claim 6, characterized in that that three or more, preferably equally wide strip webs (13 to 15) are used and that the mutual spacing of the strip webs at the wider points of the core in each case one another are the same size » Sha / H 5098 0 7 / 008b Blank page