JPH0252680A - Ski, similar sport member and production therefor - Google Patents

Abstract

PURPOSE: To make a manufacturing method simple and the mechanical characteristics resistant to stress by enclosing whole surfaces of the core material of the subject equipment with hardened one or multiple-component reactive resin part, and making the upper side construct the upper surface of the equipment. CONSTITUTION: The equipment for ski and the similar sports is constructed from the core material 5, one or multi-component reactive resin part 7 being in contact with at least the narrower sides of the core material 5, the upper surface 6 with decoration layer, the lower part 3, the polyethylene sliding plane 2, and, if required a reinforcing core and/or cushioning core and steel Kante (edge) 1. The upper part 6 forms the upper surface of the ski. Thus, the upper part 6 is pushed into the core material 5 under stress loading to prevent start of degradation of the mechanical characteristics due to the stress, while constituting the finished surface of the ski eliminating any post-treatment of the surface. Additional reinforcing material and/or cushioning core is inserted into the spacer 4 between the upper part 6 or the lower part 3 and the core 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to skis or ski-like sports equipment and a method for manufacturing the same.

When manufacturing skis or ski-like sports equipment, such as snowboards, monoskis, etc. according to the Sandinch method, ready-made ski components, i.e. polyethylene running surfaces, optionally steel edges, fiber-reinforced laminates or perforated steel plates are used. The lower part, the core material, the upper part made of fiber-reinforced laminate or aluminum, optionally a cushioning core material such as a flexible plastic or rubber core material, and optionally a decorative layer are pressed. Then about 100~
When compacting under pressure at 140 degrees C, the laminate must be sanded or coated with an adhesive before compaction to ensure good adhesion between the bottom and top sides and the core. There is. However, when laminates are polished, important mechanical properties and materials are lost. When adhesives are used, in practice the adhesive usually oozes out laterally during the pressing process and has to be removed before the attachment of the sides or the U-shaped enclosure. In this method, the bond also requires cooling under pressure in order to obtain the ski stress.

DB-A 3636649 describes the attachment of a U-shaped enclosure to a ski body manufactured by this method.

The upper part is between the core and the enclosure.

In this case, there are two ways to attach the decorative layer.

If the upper part glued to the core already has a decorative surface, the U-shaped enclosure must be made of transparent plastic, especially polyurethane material, but this material is usually not UV-stable and yellows.

UV-resistant polyurethane materials produced starting from isoflon diisocyanate have to be processed absolutely moisture-free in a vacuum and are highly toxic. If the decorative surface is later attached to the U-shaped enclosure, the enclosure must be cleaned and polished before printing and a rank applied to the printed surface.

Also known from DE-A 1703078 is a ski whose core is entirely surrounded by a polyurethane coating. The core has a helical spool of fiberglass along its entire length, making the ski heavier and stronger than a sandwich ski due to the full-coverage wrapping of glass fiber.

In all of the skis described above, the upper side or spool is in direct contact with the ski core. When using a foam core, the upper portion or spool will move into the core under stress. The ski thus loses stress and becomes softer.

In the ski known from US-A 3,940,157, a box-shaped core frame, which can contain a foam core or a honeycomb core, is sealed with a covering. The upper part is fixed to this sheathing by metal planes. In addition, a decorative layer is attached.

From US Pat. No. 3,542,38 B a ski is known which has a lightweight wood core surrounded on all sides by a watertight plastic coating for moisture protection.

The object of the invention is to provide a ski or ski-like sports equipment that is simple to manufacture and whose mechanical properties do not change even when exposed to stress.

The aforementioned object is solved by a ski or ski-like sports equipment whose core is surrounded on all sides with a mono- or multi-component reactive resin and whose upper side forms the upper side of the sports equipment.

The subject of the invention is therefore a core material, at least a part of the cured mono- or multicomponent reactive resin which abuts the narrow side of the core material;
In skis or other sports equipment consisting of an upper part, a lower part, a polyethylene running surface and optionally a reinforcing and/or cushioning core and optionally a steel edge, hardening the entire surface of the core. A ski or similar sports equipment characterized in that it is encased in a mono- or multi-component reactive resin part which is thus coated and whose upper side forms the upper side of the ski.

1 shows an advantageous embodiment in cross section; FIG. In the figure, reference numeral 1 is a steel planer, 2 is a polyethylene running surface, 3 is a lower part, 4 is a spacer, 5 is a core material, 6 is an upper part with a decorative layer, and 7 is a surrounding wall made of mono- or multi-component reactive resin. .

As the lower part, a conventional fiber-reinforced laminate or prebreges, a perforated steel plate, or in some cases an aluminum plate, etc. are used. This lower part can be connected to the polyethylene running surface already before being placed in the mold.

For the upper side, conventional fiber-reinforced laminates or prebregues, aluminum plates, etc. are likewise used.

As reinforcing materials it is possible to use fabrics, gels, mats, glass silk, glass, carbon, aramids and/or mixtures of these materials. There is already a decorative surface on the upper side which forms the surface of the finished sports equipment. Decorative surfaces can be made of printed paper, metal foil, etc.

The upper side is not located between the core and the mono- or multi-component reactive resin enclosure in the finished sports equipment, but forms the upper side of the ski. This, on the one hand, prevents the upper part from being pushed into the core material during stress loads and thereby prevents the onset of deterioration of the mechanical properties, and on the other hand, it already forms the finished upper side of the ski and any further work is no longer necessary. It becomes necessary.

As the core material, all known core structures can be used, such as polyurethane light foam cores, thermoplastic polyurethane cores, wood cores, honeycomb cores made of wood, cardboard, etc., and cores of combinations of these materials. The core has a flat surface, but can also have markings, grinding, etc.

One- or multi-component reactive resins, in particular polyurethane elastomeric resins, can be used for the core enclosure. By selecting the reactive resin, the properties of the ski or ski-like sports equipment can be influenced in a desired manner. For example, by using soft elastic polyurethane resin, skis with very good cushioning properties can be created. Similarly, the properties of the ski can be influenced in a desired manner by means of the wall thickness and the density of the surrounding wall. The ski according to the invention can have additional reinforcing and/or dampening cores between the upper or lower part and the core, which simultaneously function as spacers during ski manufacture. These reinforcing and dampening cores can be made of carbon fiber, aramid, soft elastic plastic, rubber, etc. and influence the properties of the ski in the desired manner. These reinforcing and dampening cores are inserted in strips along the entire length of the ski and are approximately
It has a height of 10.5 mm and a width of about 1 to 3 mm. At least two strips are each required for spacing.

If the core material has a ground part, stamped part, etc., there is no need to use a spacer.Depending on the depth of the ground part and stamped part, the space left for forming the surrounding wall is separated by the core material, the upper part, and the lower part. This will be secured between the department and the department.

To manufacture skis or ski-like sports equipment, a polyurethane running surface, optionally a steel planer, an underside, optionally a spacer or a cushioning core and/or reinforcing core, is placed in a mold whose inner diameter matches the shape of the finished sports equipment. An upper part with a core, optionally also a spacer or a buffer core and/or a reinforcing core and a decorative layer is inserted. After closure of the mold, a mono- or multicomponent reactive resin, in particular a polyurethane resin, is foamed in the space left around the core under pressure of 10 to 25 bar. The mold is then only exposed to about 30-50 degrees Celsius. The resin then completely surrounds the core and also fills the seam between the core and any inserted spacers or spacers and the lower side or -E side. The spacer may be a cushioning core and/or a reinforcing core, as previously described. If the core material has a stamped part or a ground part, there is no need to insert a spacer. Next, the finished sports equipment is removed from the mold. The upper part together with the decorative layer forms the surface of the ski. No secondary operations are necessary, and the size of the ski or ski-like sports equipment is determined solely by the dimensions, radii, etc. determined by the mold.

It is.

Symbol in the diagram ■・・・Steel planer, 2・ Surface, 3... Lower side part, 4. ・Core material, 6...upper part, ・Polyurethane running ...Spacer, 5... 7... Surrounding wall.

(No changes to the contents of the drawing) No. figure hand Continued Supplementary Positive book (Bu J formula) name of invention Relationship with the incident

Claims (1)

[Scope of Claims] 1) A core material, at least a hardened mono- or multicomponent reactive resin part abutting the narrow side of the core material, an upper part, a lower part, a polyethylene running surface and optionally a reinforcing core material and / or in skis or similar sports equipment consisting of a cushioning core and optionally a steel edge, in which the entire surface of the core is covered with a cured mono- or multi-component reactive resin part, so that the reactive resin part becomes a coating. Ski or similar sports equipment, characterized in that the upper part forms the upper side of the ski. 2) The ski or similar sports equipment according to claim 1), wherein the entire surface of the core material is surrounded by polyurethane resin. 3) Claim 1) or 2) wherein the upper part has a decorative surface.
Skis or similar sports equipment as described. 4) Polyethylene running surface, optionally components such as steel edges, underside, optionally reinforcing core and/or damping core, ski core, optionally reinforcing core and/or damping core The material and the upper part are placed in a mold whose internal dimensions correspond to the shape of the finished ski or ski-like sports equipment, with a polyethylene running surface, optionally a steel edge, and the lower part, optionally reinforced. The core and/or cushioning core, ski core, optionally reinforcing core and/or cushioning core, and the upper part are then filled, and the space freed from said component is then filled with one or more component reactive resin. In a method of manufacturing skis or ski-like sports equipment in which the core material is filled and cured under pressure, this space is completely filled with one or more layers, leaving a space for forming a core coating directly around the core material. A manufacturing method characterized by filling and curing with a multicomponent reactive resin. 5) Claim 4, wherein polyurethane is used as the reactive resin.
) method described. 6) Applying a pressure of 10-25 bar to cure the reaction resin;
The method according to claim 4) or 5), which is carried out at a temperature of 30 to 50 degrees Celsius.