Ski
AssigneeKastle Aktiengesellschaft
InventorsUllrich Metzler, Michael Broger, Rainer Nachbaur
Life of this patent
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Abstract
A ski having a stressed-skin design, in which the inner supporting structure is covered at the sides and above by a skin of preferably un-reinforced plastic which is joined to a flat bottom assembly consisting at least of the running surface and, optionally, steel edges. The internal space between the upper skin, consisting of a shaped plastic top sheet, and the components making up the bottom assembly contains one or more hollow bodies whose walls are made of fibre-reinforced plastic.
Claims27
A ski, of monocoque design, in which the internal load-bearing construction is covered laterally and above by a shell made from un-reinforced plastics material, which joins onto a flat, lower subassembly, comprising at least a base and steel edges, wherein a space enclosed by the shell formed from a moulded covering foil of plastics material, and the components of the lower, flat, subassembly, comprises a hollow body comprising at least two adjacently located hollow chambers extending in the longitudinal direction of the ski, with walls made from fibre-reinforced plastics material, wherein at least one partition wall made from fibre reinforced plastics material is located between two hollow chambers, formed from the wall material of the hollow chamber.
A ski, of monocoque design, in which the internal load-bearing construction is covered laterally and above by a shell made from un-reinforced plastics material, which joins onto a flat lower subassembly, composed of at least a base and steel edges, wherein a space enclosed by the shell formed from a moulded covering foil of plastics material, and the components of the lower, flat subassembly, comprises a hollow body composed of at least two adjacently located hollow chambers extending in the longitudinal direction of the ski, with walls made from fibre-reinforced plastics material, wherein each individual hollow chamber is completely enclosed by fibre-reinforced plastics material, so that between the at least two hollow chambers-vertical partition walls made from fibre-reinforced plastics material are formed.
Method for manufacturing a ski with the aid of a mould composed of a first half-mould and a second half-mould, in the hollow mould space of which the moulding of the ski takes place, comprising the steps of:
- a) inserting structural components of the lower sub-assembly in the cavity of the first half-mould;
- b) providing and positioning in the mould one or more tubular, synthetic resin-impregnated fibre-material sheet configurations with internal hoses of air-tight material,;
- c) positioning in the mould a covering foil made from plastics material, provided with a decoration and/or an external protective foil, wherein the side edges of the of the covering foil overhang the cavity of the first half-mould;
- d) placing the second half-mould, with a mould cavity corresponding to the side and to surface contours of the ski body, on the first half-mould, whereby the projecting edges of the covering foil are positioned, but not clamped, in the gaps in the edges between the second half-mould and first half-mould in a manner filling in said gaps;
- e) inflating the internal air-tight hose or hoses inside the synthetic resin-fibre material tube(s) with compressed air, whereby they expand and the synthetic resin-fibre material tube(s) also expands, whereby the edge zones of the covering foil located in the gap in the edges between the second half-mould and the first half-mould are at least in part pulled out of the gap in the edge and the foil sits, without expansion or stretching, and without distortion of the decoration possibly applied, closely on the internal wall of the second half-mould;
- and,
- f) curing the synthetic resin of the synthetic resin-fibre material tube(s), while the internal pressure of the compressed air in the internal air-tight hose or hoses is retained, possibly with heat being supplied.
Device for manufacturing a ski with a preferably heatable mould, composed of two half-moulds, wherein the lateral enclosing surfaces of the first half-mould and/or of the second half-mould are configured so that when the mould is closed, in the area of the enclosing surfaces which contains the edge zones of the covering foil, a gap, delimited by stops, is formed, the height of which is approximately equal to the thickness of the covering foil, optionally including the protective foil.
Dependencies are inferred from the claim text.