DE8526858U1 - Lightweight core, especially for skis, e.g. cross-country skis - Google Patents

Description

- 2 lightweight core, especially for skis, cross-country skis.

The invention relates to a lightweight core, in particular for skis, e.g. cross-country skis, which have a zei- ' has len-shaped structure, which consists of cavities which penetrate the core, the cavity axes in the direction of the cavities are perpendicular to the imaginary surfaces of the core at the ends of the cavities.

A lightweight core with a cellular structure is already known, the cells of which are W-shaped are included, which consist of impregnated paper-like material. The core has the shape of a plate, which is penetrated by the cavities, and is used in a component in such a way that the load of the Component acts as pressure on the edges of the walls. When using the lightweight core as a support core of a ski, where a Lioiglauf ski is primarily thought of is the Core covered on the running side and on the upper surface by a belt. These straps can be used with side straps of the ski be glued. The lines are through with the known core Layering of wavy foils with an interposed one.

j documents also formed from films, _w ith which the corrugated foils are bonded.

The disadvantage "with this known core that it by the films located between the wave-shaped films have increased weight and that it is used for cross-country skiing with the necessary sidecut a high deformation resistance due to the trapezoidal cavity cross-sections having.

According to the innovation, these disadvantages are eliminated in that the core is sinusoidally corrugated by layering) r Foils is formed, with the waves at their valleys with ■ are glued together and the film layers are in use. are subjected to pressure. Due to the elimination of the well-known beint Core necessary intermediate layers, one obtains a considerable weight saving and since the hemstitch through the

I _I sinüsart.is corrugated film lengths limited aind, read ^

The latter are slightly deformed when the SkLa is waisted ^

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Further details and advantages result from the Features of the subordinate claims *

The innovation is based on an example explained, which is shown in the drawing figure, and although in a cross section of the core.

This core 1 has adjacent layers of sinusoidally shaped foils I ¹ which are glued to their valleys 1 ″ the core is covered by side walls 2; these consist, for example, of polyurethane foam, phenol, ABS, polyethylene, wood or combinations of these materials.

A core produced in this way can have a bulk density of 20 to 100 g / nP.

If you use impregnated paper-like material for the foils, this impregnation from epoxy resins, Melamine or a phenolic resin compound.

The cells of the core formed by the cavities can also, at least over part of their depth and after be filled in places by a nailable compound.

When used in ski construction, especially for a cross-country ski, the arrangement is made so that the lightweight core 1 forms the support core of the ski, with straps being placed on the tread and on the top in the usual way, which with the core as well as the side boundaries 2, the side wall materials, be glued.

The foils forming the core can also partly consist of impregnated, paper-like layers on the one hand and from assist non-impregnated paper-like layers on the other hand; the weight of the first-mentioned layers can be 0.5 to 10 times the weight of the second-mentioned layers be.

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Such a? Leichfbauketn can also be used for manufacturing are used by alpine skis, but are also used in vehicle construction.

1 ... lightweight core for cross-country skis

2 ... Seiteriwangenmatenalien

Claims (7)

Protection claims: 1.Lightweight core, which has a cellular structure, which consists of cavities that penetrate the core, the hollow roughness axes in the direction of the cavities stand perpendicular to surfaces of the core imagined at the ends of the cavities, characterized in that the core is formed by layering sinusoidally corrugated foils, with the corrugations glued to one another at their valleys and the film layers are in use and are under pressure. 2. Lightweight core according to claim 1, characterized in that that this core, when used as a ski core, has side walls on both sides, consisting either of polyurethane foam, Wood, polyethylene, ABS, phenol or combinations of these materials is limited. 3. Lightweight core according to claim 1, characterized in that that at least part of the stratification is made of impregnated, made of paper-like material. 4. lightweight core according to claim 1, characterized in that the density of the impregnated and cured lightweight core has 20 to 300 g / m ³ , 5. lightweight core according to claim .3, characterized in that the weight of the impregnated, paper-like Layers is 0.5 to 10 times the weight of the non-impregnated, paper-like films. 6. lightweight core according to claim 1, characterized in that the impregnation of the paper-like material either consists of epoxy, melamine or phenolic resin compound. 7. Lightweight core according to claim 1, characterized in that the cells at least over part of the depth and are filled in places by a nailable mass. The fact that the lightweight construction kerti forms the support body ia * ^ - "STa ~~" and running surface side sojd ^ _ ^ 4rf- ^ eTner top has straps, die_jaJ_t --- d ^ irTieTchtbaukern as well as the lateral Bcgrcn " »E — ai .. it. BL η g