EP0747099A2 - Ski - Google Patents

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Publication number
EP0747099A2
EP0747099A2 EP96112713A EP96112713A EP0747099A2 EP 0747099 A2 EP0747099 A2 EP 0747099A2 EP 96112713 A EP96112713 A EP 96112713A EP 96112713 A EP96112713 A EP 96112713A EP 0747099 A2 EP0747099 A2 EP 0747099A2
Authority
EP
European Patent Office
Prior art keywords
ski
fiber
shell
hollow
hollow body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP96112713A
Other languages
German (de)
English (en)
Other versions
EP0747099A3 (fr
Inventor
Michael Broger
Ullrich Metzler
Rainer Nachbaur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kastle AG
Original Assignee
Kastle AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kastle AG filed Critical Kastle AG
Publication of EP0747099A2 publication Critical patent/EP0747099A2/fr
Publication of EP0747099A3 publication Critical patent/EP0747099A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C5/00—Skis or snowboards
    • A63C5/12—Making thereof; Selection of particular materials

Definitions

  • the invention relates to a ski in shell design, in which the inner load-bearing structure is covered laterally and upwards by a shell made of preferably unreinforced plastic, which connects to a flat lower assembly, consisting at least of an outsole and optionally steel edges.
  • a shell-shaped upper part made of optionally fiber-reinforced plastic with flange-like side edges is produced in a specially provided shape, either together with the ski core or merely as a shell, the pre-manufactured ski upper part being connected to the likewise pre-manufactured lower part of the ski.
  • the enclosed empty space formed in this way is foamed after connection to the lower part of the ski to form a ski core.
  • a separate decorative layer applied to the shell is preferably provided for the decoration of the ski (EP-A 0 394 835).
  • Yet another known method provides that the multilayer shell material is placed in a flat configuration on the mold cavity of a lower mold, the edge regions of the flat shell material initially protruding laterally beyond the mold cavity, whereupon the shell material is pressed into and through the mold cavity with the aid of the prefabricated ski core the shell is brought into its final shape and finally connected to the lower part of the ski, for example by gluing (DE-C 38 03 483).
  • the object of the invention is to provide a shell ski which is characterized by low weight and good strength properties and which is also accessible for efficient production.
  • one or more hollow bodies with walls made of fiber-reinforced plastic are arranged in the space enclosed by the upper shell formed from a deformed plastic cover sheet and the components of the lower flat assembly.
  • the hollow body or bodies fill, if necessary with any additional inlays, the interior space between the shell and the components of the flat lower assembly.
  • the one or more hollow bodies can preferably be formed from circumferentially closed, synthetic resin-fiber material tubes which are formed by inflation.
  • a hollow body with walls made of fiber-reinforced plastic and consisting of at least two hollow chambers extending in the longitudinal direction of the ski is arranged , wherein at least one intermediate wall lying between two hollow chambers made of fiber-reinforced plastic is formed from the wall material of the hollow body.
  • the compressed air overpressure in the hoses is removed and the ski is removed from the mold.
  • any edges of the cover film which still protrude beyond the side surfaces of the lower component group are cut off, if necessary in such a way that the hardened synthetic resin of the hollow body or the hollow body forms a gap-filling web between the lateral lower edge of the shell and the upper side of the lower flat assembly, preferably the Steel edge, forms.
  • the hoses can be removed from the cavities of the now hardened hollow bodies for reuse. However, these hoses can also remain inside the hollow chambers. If the cover film was provided with a protective film, this protective film is removed after the manufacturing process has ended.
  • the plastic cover sheet deformed to form the upper shell must have sufficient pliability, should therefore have a relatively small thickness, for example less than 1.0 mm, preferably about 0.5 mm, and should preferably be made of a plastic material with an elastic modulus below 5000 N / mm 2 , preferably from 1000 N / mm 2 to 3000 N / mm 2 .
  • Unreinforced, preferably thermoplastic plastics such as ABS copolymers or polyamide fall into this range.
  • a preferably textile fibrous structure impregnated with synthetic resin is used, the fibrous structure already being in "seamless" tubular form, e.g. as a hose mesh, can be present; otherwise you can also use a flat fibrous sheet, e.g. Form tissue or unidirectional layers into a tube.
  • the fibers can be oriented in different directions, e.g. in the case of a tubular braid at an angle to the longitudinal extension of the tubes, if appropriate in connection with braided fiber strands which extend in the longitudinal extension of the tubes. When choosing the angle of the oblique threads, it must be taken into account that this angle changes when the inner airtight tubes are inflated.
  • the synthetic resin with which the fibrous structure is impregnated can be a thermosetting reactive resin, e.g. Be polyester resin or epoxy resin.
  • Prepreg coils or prepreg tubes, in which the matrix material can be thermoplastic or thermosetting can also be used for the synthetic resin-fiber material tubes.
  • the prepreg is already in a pre-hardened state. Even if one starts from several synthetic resin-fiber material tubes, one can achieve an integral (one-piece) supporting inner hollow body having a corresponding number of hollow chambers.
  • further reinforcement layers can also be inserted into the mold, for example made of fiber materials impregnated or already bound with synthetic resin and / or of light metal; these additional reinforcement layers are preferably coated with adhesive before insertion into the mold.
  • the inserts can serve to reinforce the belt layers and, like the synthetic resin-fiber tubes, extend essentially over the entire length of the ski or can also be inserts limited in the longitudinal direction of the ski, for example in the binding area to increase the screw pull-out strength.
  • the inlays can also be three-dimensional in shape, so that they serve as a damping or stabilizing element and, if appropriate, can be seen on the ski surface.
  • wedge-shaped or gusset-shaped inserts can preferably be arranged above and / or below the partition walls, which reduce the buckling length of the partition walls.
  • the device used to carry out the method consists, in addition to workstations, for dressing and printing the plastic cover film and for preparing the synthetic resin-fiber tubes with the airtight hoses on the inside, essentially of a two-part shape, one half of the mold being a recess for receiving the components of the has lower assembly of the ski (outsole, steel edges) and the mold cavity of the other mold half is designed according to the three-dimensional side and / or surface contour of the ski. In principle, this corresponds to the known prior art.
  • a mold suitable for carrying out the method must have a compressed air connection leading to the mold cavity, to which the airtight hoses arranged within the synthetic resin-fiber material tubes can be connected.
  • the lateral closing surfaces of the first mold half and the second mold half must be designed such that when the mold is closed, a gap limited by stops forms in that area of the closing surfaces which receives the edge zones of the cover film, the height of which is approximately equal to the thickness of the cover film .
  • protrusions protruding upwards can be formed on the closing surfaces of the first mold half, on which the edges of the cover foil brought into the curved state for temporary maintenance of the cover foil when the cover foil is placed on it Can support curvature.
  • the outer edge regions of the closing surfaces of the mold halves should lie sealingly on one another when the mold is closed, it being advantageous if on the outer edge regions of the closing surfaces the first mold half and / or the second mold half separate sealing strips made of elastically deformable material, for example can be arranged from elastomeric plastic.
  • At least one of the mold halves should be heatable in order to harden the reaction resin.
  • Cold-curing reactive resin systems that do not require additional heat can also be used.
  • FIG. 1 shows the cross section of a ski according to the invention.
  • Fig. 2 also shows the cross section of a further embodiment of a ski according to the invention.
  • FIGS. 3-5 illustrate the method, in each case cross sections of the production mold with the components of the ski located therein are shown.
  • 6 shows, in partial cross section, a further variant of a ski according to the invention.
  • 7 and 8 each show a further embodiment of a ski according to the invention in cross section.
  • the ski according to Fig. 1 belongs to the type of shell skis and consists of a flat lower assembly with the outsole 1, e.g. made of polyethylene, and the side steel edges 2.
  • the inside of the ski is laterally and upwards from a shell 3 made of non-reinforced plastic, e.g. ABS or polyamide, enclosed.
  • the inner load-bearing structure of the ski is formed by a hollow body 4 with walls 5, 6 made of fiber-reinforced thermoplastic or thermosetting plastic, e.g. glass fiber reinforced polyester resin or epoxy resin.
  • the inner hollow body 4 fills the interior between the upper shell 3 and the lower assembly 1, 2 such that the outer walls 5 abut the inner walls of the shell 3 or the lower assembly 1, 2.
  • the hollow body 4 also has vertical partition walls 6 which divide the interior of the hollow body 4 into three air-filled hollow chambers 4 '.
  • the hollow body 4 extends essentially over the entire length of the ski. In the tip and end area, the hollow body 4 can optionally be replaced by special end components.
  • the flat lower component group again consists of the outsole 1 and the steel edges 2, but in addition there is an intermediate layer 7 which is continuous over the length of the ski and is made of load-bearing material, e.g. made of fiber-reinforced plastic or metal, or non-load-bearing material, e.g. made of unreinforced plastic or wood.
  • load-bearing material e.g. made of fiber-reinforced plastic or metal
  • non-load-bearing material e.g. made of unreinforced plastic or wood.
  • an outer shell 3 made of unreinforced plastic and inside a hollow body 4 with walls 5, 6 made of fiber-reinforced plastic.
  • the hollow body 4 has only one vertical partition 6, which divides the interior of the hollow body into two air-filled hollow chambers.
  • the cover film Before the decoration is applied, the cover film can be transparent and is then e.g. screen printed, preferably on the inside of the finished ski.
  • the film thickness can e.g. 0.2 - 1.0 mm, preferably 0.5 - 0.6 mm.
  • the cover film 8 must have a sufficient length and width corresponding to the subsequent deformation.
  • the cover film can be a uniform film consisting of a single plastic or consist of areas of different or differently colored plastics which are, for example, integrally connected to one another. In the processing state, however, a cover film assembled in this way is also in one piece.
  • the components of the lower assembly of the ski namely the outsole 1 and the steel edges 2 are inserted into the recess 9 of the first mold half formed here as the lower mold 10.
  • These components 1, 2 can already be connected (glued) to one another before insertion into the recess 9 of the lower mold 10.
  • Resin-fiber tubes 11 are then placed on the components 1, 2 of the lower assembly of the ski, e.g. made of glass fiber impregnated with polyester resin or epoxy resin, which are provided with inner tubes 12 made of airtight material.
  • the cover film 8 is then placed over the synthetic resin-fibrous tubes 11, the side edges of which protrude laterally beyond the depression 9 of the lower mold and are supported on projections 13 of the lower mold.
  • the second mold half here the upper mold 14 is placed on the lower mold 10 and has a mold cavity corresponding to the side and surface contour of the ski body (FIG. 4).
  • Both the closing surfaces 15 of the lower mold 10 and the closing surfaces 16 of the upper mold 14 have sealing strips 17 and 18 on the outermost edge, which are made of an elastically yielding material, e.g. B. consist of an elastomeric plastic.
  • lateral gaps which open into the mold cavity are further formed by appropriate design of the closing surfaces 15, 16.
  • the lateral edge zones of the cover film 8 lie in this column.
  • the gap thickness is dimensioned such that the edge zones of the cover film 8 just fill the gap, but are not immovably clamped in the gap.
  • the hoses 12 are connected, for example, on one of the longitudinal ends of the mold cavity to a compressed air supply formed in one of the mold halves 10, 14.
  • the tubes 12 are inflated, whereby they expand and the synthetic resin-fiber tubes 11 are also expanded.
  • the edge zones located between the upper mold 14 and the lower mold 10 of the cover film 8 is at least partially pulled out of the edge gap, and the cover film 8 lies against the inner mold wall of the upper mold 14 without stretching or stretching and without distortion of the decoration which may be applied to the cover film 8. 5 also experience the shape and position shown in FIG.
  • the synthetic resin of the synthetic resin fiber tubes being able to escape from the tubes due to the pressure exerted by the inflated hoses 12 and being in complete contact with the Manufactures inner wall of the cover film 8 and the components 1, 2 of the lower assembly of the ski and also between the individual synthetic resin-fiber material tubes 11.
  • the synthetic resin of the synthetic resin-fibrous tubes 11 also causes the adhesion with the cover film 8, the legs of the steel edges 2 and the inside of the outsole 1.
  • the synthetic resin emerging from the synthetic resin-fibrous tubes 11 also effects the adhesive connection (adhesive connection) between the steel edges 2 and the preferably flange-like outwardly bent edges of the cover sheet 8.
  • the synthetic resin can also penetrate between the legs and the outsole 1 and so also glue these two components, if the steel edges have not already been glued to the outsole 1 before insertion into the lower mold.
  • the three synthetic resin-fiber tubes 11 grow together into a single integral structure consisting of three hollow chambers.
  • the supply of heat for curing the synthetic resin takes place while maintaining the compressed air pressure in the hoses 12.
  • the supply of heat expediently begins at the same time as the expansion phase of the hoses 12, but it can also take place at different times.
  • the mold After curing, the mold is opened. Any protruding edges of the cover film 8 are cut off.
  • the cover film 8 is thus identical to the shell 3 shown in FIG. 1 and the synthetic resin-fiber material tubes 11 now form the integral hollow body 4 shown in FIG. 1 with the walls 5, 6 made of fiber-reinforced plastic and three hollow chambers.
  • the synthetic resin of the synthetic resin fiber tubes 11 After the synthetic resin of the synthetic resin fiber tubes 11 has hardened, the excess pressure in the airtight hoses 12 on the inside can be released. Finally, the hoses 12 can be removed from the chambers of the hollow body, through corresponding openings in the area of the ski tip or the rear of the ski, these openings subsequently being e.g. can be closed with a lace protector or end protector.
  • the wedge-shaped or gusset-shaped elements 19 can consist of prefabricated plastic profiles, for example of fiber-reinforced plastic in the form of a profile, or also of wood in a corresponding strip shape.
  • FIG. 7 relates to an embodiment of a ski according to the invention, again with a lower flat assembly consisting of outsole 1 and steel edges 2 and an outer shell 3 made of non-reinforced plastic and an inner three-chamber hollow body 4 with walls 5,6 made of fiber-reinforced plastic.
  • These elements or designs can be formed by prefabricated inserts or by controlling the pressure when the synthetic resin-fiber material tubes forming the hollow body 4 are inflated, synthetic resin emerging from the synthetic resin-fiber material composite forming the wedge-shaped or gusset-shaped elements 19.
  • a reinforcing insert 20 made of fiber-reinforced plastic or metal is provided between the outside of the hollow body 4 and the inside of the shell 3 to reinforce the upper belt or to reinforce the binding attachment area.
  • this reinforcing insert 20 extends only over the width of the top of the three-chamber hollow body 4 and not also in the region of the side walls of the ski.
  • the reinforcement insert 20 can extend over the entire length of the ski or only over part of the length, e.g. extend over the binding attachment area.
  • the reinforcing insert 20 is preferably connected to the still flat cover film, e.g. glued.
  • the lower side edges of the shell 3 are bent out like a flange. Their underside is at a short distance, e.g. about 0.5 mm, over the top of the steel edges 2 (or generally over the top of the lower flat assembly).
  • the still flowable synthetic resin of the synthetic resin-glass fiber tubes of the hollow body 4 penetrates into the gap thus formed and, after hardening, forms a web 21 made of hardened synthetic resin, which connects the side edges of the shell particularly well 3 with the steel edges 2 guaranteed.
  • the basic structure of the ski again consists of the flat lower assembly (outsole 1, steel edges 2), the outer shell 3 and the inner load-bearing hollow body 4, which again is a three-chamber hollow body is.
  • Strip-shaped reinforcing inserts 22 made of synthetic resin-bonded carbon fibers or metal are arranged between the top of the hollow body 4 and the shell 3 made of unreinforced plastic.
  • Carbon fiber inserts 23 also contain the walls of the two lateral hollow chambers of the hollow body 4, which otherwise consists of a synthetic resin-glass fiber composite.
  • the thread-like carbon fiber inserts 23 can be braided into the glass fiber reinforcement of the synthetic resin-fiber tubes, which preferably consists of a tubular braid, and from which the hollow body 4 is formed.
  • the side chambers of the hollow body 4 are strengthened by the carbon fiber inserts in order to better support the edge region of the ski.
  • the lateral synthetic resin fiber tubes in comparison to the middle synthetic resin fiber tubes
  • an increased fiber content eg glass fiber content
  • the hollow body 4 extends essentially over the entire length of the ski. This preferably also applies to the other exemplary embodiments. However, if, as in FIG. 2, there is an additional load-bearing lower chord layer 7 and, as in FIG. 7, there is an additional load-bearing upper chord layer 19, it would be possible to use hollow bodies which are divided in the longitudinal direction of the ski, e.g. such that there is a separate hollow body in the front part and in the rear part of the ski and a solid core is present in the middle area (binding attachment area).
  • a trapezoidal ski cross-section and a correspondingly shaped mold cavity were chosen in particular for reasons of simplicity of illustration.
  • the invention also allows others, e.g. cross-sectional shapes curved upward, and cross-sectional shape changing almost arbitrarily in the longitudinal direction of the ski.
  • the method and the construction according to the invention are particularly suitable for alpine skis, but can also be used on cross-country skis, snowboards and other skis or ski-like sports equipment.

Landscapes

  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Laminated Bodies (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Lubricants (AREA)
  • Moulding By Coating Moulds (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Golf Clubs (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP96112713A 1993-06-09 1994-04-20 Ski Withdrawn EP0747099A3 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT1119/93 1993-06-09
AT111993 1993-06-09
EP94912408A EP0706412B1 (fr) 1993-06-09 1994-04-20 Procédé pour la fabrication d'un ski

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP94912408.5 Division 1994-04-20

Publications (2)

Publication Number Publication Date
EP0747099A2 true EP0747099A2 (fr) 1996-12-11
EP0747099A3 EP0747099A3 (fr) 1997-02-05

Family

ID=3506997

Family Applications (2)

Application Number Title Priority Date Filing Date
EP96112713A Withdrawn EP0747099A3 (fr) 1993-06-09 1994-04-20 Ski
EP94912408A Expired - Lifetime EP0706412B1 (fr) 1993-06-09 1994-04-20 Procédé pour la fabrication d'un ski

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP94912408A Expired - Lifetime EP0706412B1 (fr) 1993-06-09 1994-04-20 Procédé pour la fabrication d'un ski

Country Status (6)

Country Link
EP (2) EP0747099A3 (fr)
JP (1) JPH08510931A (fr)
AT (1) ATE146683T1 (fr)
CA (1) CA2164872A1 (fr)
DE (2) DE59401419D1 (fr)
WO (1) WO1994028984A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042418A3 (fr) * 1997-03-25 1999-01-14 Boards Unlimited Sportartikel Planche de glisse
US6189912B1 (en) 1997-03-25 2001-02-20 Boards Unlimited Sportarikel Gmbh & Co. Kg Slide board

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2165677A1 (fr) * 1994-04-29 1995-11-09 Ullrich Metzler Ski
AT422U1 (de) * 1994-10-20 1995-10-25 Kaestle Ag Snowboard und verfahren zu seiner herstellung
FR2731160B1 (fr) * 1995-03-03 1997-05-16 Salomon Sa Procede de fabrication d'une structure moulee, notamment de ski ou de surf des neiges, par injection d'une mousse a expansion "in situ"
AT406341B (de) * 1995-11-15 2000-04-25 Kaestle Ag Verfahren zur herstellung eines formteils, insbesondere eines skis
AT412839B (de) * 2000-06-02 2005-08-25 Atomic Austria Gmbh Gleitvorrichtung, insbesondere schi, snowboard oder dgl.
AT500325A1 (de) 2002-11-06 2005-12-15 Tyrolia Technology Gmbh Gleitbrett, insbesondere ski
DE20316335U1 (de) * 2003-10-22 2004-03-11 Boards & More Ag, Clarens Snowboard
US12508493B2 (en) * 2022-01-31 2025-12-30 The Moss Companies Device and method of manufacturing for a snow and water sport sliding device with a pneumatic core
US11883736B2 (en) * 2022-01-31 2024-01-30 The Moss Companies Device and method of manufacturing for a snow and water sport sliding device with a pneumatic core

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT241311B (de) * 1961-05-03 1965-07-12 Haldemann S A Preßform zur Herstellung von Hohlskiern
FR2424470A1 (fr) * 1978-04-26 1979-11-23 Amf Inc Articles manufactures presentant des dimensions exterieures non uniformes ainsi que des surfaces incurvees, et procede de fabrication
FR2654645B1 (fr) * 1989-11-22 1992-08-28 Salomon Sa Procede de realisation d'un ski par injection, et structure de ski obtenue par ce procede.
DE4124519A1 (de) * 1991-07-24 1993-01-28 Reinhold Sommer Aus einem strangfoermigen hohlkoerper hergestellter ski
DE4402301A1 (de) * 1993-02-23 1994-09-01 Germina Sport Equip Gmbh Verfahren zur Herstellung eines Hohlskis und danach hergestellter Hohlski

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042418A3 (fr) * 1997-03-25 1999-01-14 Boards Unlimited Sportartikel Planche de glisse
US6189912B1 (en) 1997-03-25 2001-02-20 Boards Unlimited Sportarikel Gmbh & Co. Kg Slide board

Also Published As

Publication number Publication date
JPH08510931A (ja) 1996-11-19
CA2164872A1 (fr) 1994-12-22
WO1994028984A1 (fr) 1994-12-22
DE9421841U1 (de) 1996-10-10
EP0747099A3 (fr) 1997-02-05
EP0706412B1 (fr) 1996-12-27
EP0706412A1 (fr) 1996-04-17
ATE146683T1 (de) 1997-01-15
DE59401419D1 (de) 1997-02-06

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