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WO1986004512A1 - Ski core of plastic material and ski containing such a core - Google Patents

Ski core of plastic material and ski containing such a core Download PDF

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Publication number
WO1986004512A1
WO1986004512A1 PCT/AT1986/000011 AT8600011W WO8604512A1 WO 1986004512 A1 WO1986004512 A1 WO 1986004512A1 AT 8600011 W AT8600011 W AT 8600011W WO 8604512 A1 WO8604512 A1 WO 8604512A1
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WO
WIPO (PCT)
Prior art keywords
ski core
ski
core
core according
over
Prior art date
Application number
PCT/AT1986/000011
Other languages
German (de)
French (fr)
Inventor
Herbert Woltron
Original Assignee
Isosport Verbundbauteile Ges.M.B.H.
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 Isosport Verbundbauteile Ges.M.B.H. filed Critical Isosport Verbundbauteile Ges.M.B.H.
Priority to AT86901006T priority Critical patent/ATE64867T1/en
Priority to DE8686901006T priority patent/DE3680044D1/en
Publication of WO1986004512A1 publication Critical patent/WO1986004512A1/en

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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

  • Ski core made of plastic and ski containing this ski core
  • the invention relates to a ski core made of plastic with cavities for weight reduction, wherein, distributed over the ski core volume, there are void-free areas which each extend over the entire thickness of the ski core.
  • the invention further relates to a ski which contains the ski core according to the invention.
  • a ski core of the type mentioned above is described in AT-PS 251 465.
  • the ski core proposed there consists of pieces of tape made of thermoplastic material which are provided with longitudinal grooves and which are of double-wedge shape with a thickness varying in the length of the tape.
  • Several such plastic tape pieces are glued together to form a package and thus form the ski core having a double wedge shape.
  • These plastic tape pieces are now to be cut to length from an extruded tape in accordance with the aforementioned AT-PS, the variation of the tape thickness being achieved by varying the dimensions of the extrusion nozzles during the extrusion process.
  • the production of an extruded strand made of thermoplastic material with a cross-section that varies in the longitudinal direction of the strand has not yet been satisfactorily achieved.
  • the ski core proposed in AT-PS 251 456 has therefore not been used in practice.
  • the invention is based on the object of a ski to specify core made of plastic of the type mentioned at the outset, which can be produced in a particularly simple manner.
  • the ski core according to the invention is characterized in that it is produced from a layered or plate-shaped starting material, which consists of a fiber-mat-reinforced thermosetting or thermoplastic material, by extrusion molding, the relative cavity volume in the ski core being between 50 and 85, but is preferably between 65 to 75 vol.% and / or wherein the ski core side cheeks are preferably formed by the extrusion.
  • the ski core according to the invention is characterized in that it has a layer-like region lying over at least almost the entire ski core base surface, the course of which corresponds to the course of the parting line between the extrusion mold halves.
  • the average fiber content in the side cheeks formed by the extrusion is advantageously less than the average fiber content in the layered region.
  • the layer-shaped region borders over its entire extent or over part of its extent to the top or bottom of the ski core, it advantageously over part of its extent to the top and over one other part borders on the underside of the ski core and can advantageously have a wavy course between the top and bottom.
  • the cavity-free are Regions extending over the entire thickness of the ski are rib-shaped, advantageously several such rib-shaped regions are provided which cross one another.
  • the ski core according to the invention is characterized in that it has cylindrical cavities which each extend from the top or bottom of the ski core to the layered region.
  • thermoplastic plastic of the fiber mat-reinforced starting material is polyethylene terephthalate or a polyamide, or this plastic contains polyethylene terephthalate or a polyamide.
  • thermosetting plastic of the starting material is an epoxy resin or this plastic contains an epoxy resin.
  • the invention relates to a ski which contains a ski core according to the present invention.
  • FIGS. 1 and 2 show a first advantageous realization of the ski core according to the invention in two partial representations, namely FIG. 1 in a longitudinal section along the line 1-1 in FIG. 2 and in FIG. 2 in a section along the line II - II in fig. 1 .
  • the ski core 1 has on its underside 2 adjoining a layer-shaped region 3 which extends over the entire base area of the ski core. It also contains cylindrical cavities 4 arranged according to a regular grid, which extend from the core of the core 5 to the layer-shaped region 3.
  • Figures 1 and 2 show the ski core in a central area in which it e.g. towards the rear end of the ski (i.e. in Fig. 1 in the direction of arrow 6) decreases in thickness in a wedge shape.
  • the starting materials for the production of the ski cores are, in particular, plates made of glass fiber-reinforced thermoplastic materials, which can preferably consist of a polyamide or a polyethylene terephthalate.
  • the polyamide sheets used preferably have a glass content in the range from 20 to 40% by weight, while polyethylene terephthalate sheets are preferably used with a glass content in the range from 15 to 35% by weight.
  • An extrusion mold is used to produce the ski core or a ski core section, as is shown in FIG. 3 in a schematic cross-sectional partial representation in an open state.
  • the extrusion mold comprises a lower mold half 7 designed as a female mold and an upper mold half 8 acting as a male mold with cylindrical projections 9.
  • the two mold halves are kept at room temperature by water cooling.
  • a tailor-made strip 10 of the starting material made of a glass mat-reinforced polyamide with a glass content of, for example, 30% by weight is brought to the deformation temperature of 280 ° C. At this temperature, the matrix resin itself is already liquid; the glass fiber content keeps the strip 10 in a plastic, easy to handle condition.
  • the strip 10 is now inserted into the lower mold half 7 and fixed there. It is cut so that its edge 11 does not extend all the way to the edge 12 of the sole 13 of the lower mold half 7.
  • the mold is closed by lowering the upper mold half 8, the closing time being approximately 3 seconds.
  • Fig. 4 shows the shape during the closing process.
  • the cylindrical protrusions 9 of the upper mold half 8 penetrating into the starting material strips 10 now displace the extruded material which rises in the spaces 14 between the protrusions 9 or in the edge region 15 of the molding space.
  • the compact is now left in the mold for about 30 seconds while it cools to about 50 ° C. and solidifies, after which it is removed from the mold as a finished ski core 1 or ski core section, as shown in cross section in FIG. 5.
  • the glass fiber content only drops by a few percent. Since the glass fibers map surface of the compact, it can be advantageous in some cases to keep the glass fiber content in the side cheeks 17 of the ski core 1, the surfaces of which form the outer surface of the ski, for decorative reasons than it is in the layered ski core area 3 sets on average. This can be achieved by (see FIG. 3) increasing the distance between the edge 11 of the starting material strip 10 and the edge 12 of the sole 13 of the lower mold half 7. The resulting larger flow path of the material then results in a reduced glass fiber content in the side walls 17.
  • ski cores with different mechanical properties can be produced from the same starting material, which is used at the same deformation temperature of 300 ° C, under different cooling conditions
  • a compact is obtained from a plate-shaped starting material made of glass fiber mat reinforced polyethylene terephthalate, in which the matrix resin solidifies in a largely amorphous structure due to the relatively rapid cooling . Due to this amorphous structure of the matrix resin, the ski core has a high elasticity.
  • the ski core is produced on the basis of a thermoset plastic, in particular an epoxy resin.
  • a thermoset plastic in particular an epoxy resin.
  • This is advantageously based on a glass fiber mat impregnated with an epoxy resin hardener mixture, for the manufacture of which, for example, a needled glass fiber mat composed of continuous fibers with a basis weight of 600 g / m 2 with an epoxy resin hardener mixture, which is advantageously an epoxy resin based contains bisphenol A and a diaminic hardener, impregnated with an order of 500 g / m 2 (solid).
  • an extrusion mold is used, which is constructed similarly to that explained with reference to FIGS. 3 and 4.
  • a cut of the impregnated glass fiber mat is brought to a temperature of 120 ° C. very quickly, for example for one minute, and then introduced directly into the mold, which is kept at 140 ° C., which is then closed.
  • the material of the impregnated glass mat which, as described with reference to FIG. 4, finally fills the mold space completely, is left in the extrusion mold for about 4 minutes and hardened.
  • the compact is then hot-formed as a finished ski core or ski core section.
  • Such a ski core on the basis of glass fiber reinforced epoxy resin generally has a higher rigidity with an otherwise identical construction than can be achieved when using a thermoplastic synthetic resin.
  • This ski core is made up of two wedge-shaped half-cores that are connected to each other at their stronger ends.
  • FIGS. 6 and 7 now show one of these two ski half-cores 18 in two partial representations in the region of the stronger end 19, namely FIG. 6 in a longitudinal section along the line VI-VI in FIG. 7 and 1 f. 7 in the basics.
  • This ski half-core 18 has a layer-shaped region 22 which runs in a trapezoidal wave shape between its upper and lower sides 20, 21 and extends over its entire base surface. In addition, it comprises rib-shaped regions 23 extending in the longitudinal direction of the ski and side cheeks 24, each of which extends over the entire length of the ski. 8 shows the half ski core 18 in a partial longitudinal section in the region of its weaker end 25.
  • an extrusion mold is used, in which, analogously as explained with reference to FIGS. 3 and 4, the parting line between the extrusion mold halves corresponds to the course of the layered region 22.
  • the half-cores can have rib-shaped regions which run obliquely to the longitudinal direction of the ski.
  • these rib-shaped regions form two groups of ribs running parallel to one another, one rib of one group crossing several ribs of the other group.
  • a ski constructed using such half cores then has a higher torsional rigidity than a ski with half cores according to FIGS. 6 and 7.
  • the ski core according to the invention in the production of which practically no material waste advantageously occurs, is preferably suitable for mass production. Because of the extensive freedom in terms of shape, its mechanical properties can be better adapted to the requirements placed on the finished ski than is the case with the ski cores known to date.
  • the ski core according to the invention also has the advantage that it can be produced together with the ski core sidewalls in the same operation.

Landscapes

  • Laminated Bodies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

A ski core (1, 18) made of plastic material comprises cavities (4) which enable to reduce its weight and solid areas (23) distributed throughout the volume of the ski core, throughout the ski thickness. The core is flow formed from a stratified or laminated base product comprised of duromer or thermoplastic synthetic material reinforced by a fibre mat. The ski core (1, 18) of which the side pieces (17, 24) may be integrally formed by extrusion with the core, preferably presents a stratified area (3, 22) extending on at least almost all the base surface of the ski core of which the course corresponds to the junction between the extrusion half-moulds (7, 8). This stratified area (3, 22) may advantageously be adjacent to the upper side or the lower side (5, 2) of the ski core or may also follow an undulating course between the upper side and the lower side (20, 21) of the ski core (18). In a preferred embodiment, the cavities (4) may have a cylindrical shape, the solid areas (23) being respectively configured as ribs extending throughout the thickness of the ski core. The invention also relates to a ski comprising said ski core.

Description

Skikern aus Kunststoff sowie diesen Skikern enthaltender SkiSki core made of plastic and ski containing this ski core
Tech n i s c h e s GebietTech n i c area
Die Erfindung betrifft einen Skikern aus Kunststoff mit Hohlräumen zur Gewichtsverminderung, wobei, über das Skikernvolumen verteilt, hohlraumfreie Bereiche bestehen, die sich jeweils über die ganze Skikerndicke erstrecken. Die Erfindung betrifft ferner einen Ski, der den erfindungsgemäßen Skikern enthält.The invention relates to a ski core made of plastic with cavities for weight reduction, wherein, distributed over the ski core volume, there are void-free areas which each extend over the entire thickness of the ski core. The invention further relates to a ski which contains the ski core according to the invention.
Stand der TechnikState of the art
Ein Skikern der vorstehend genannten Art ist in der AT-PS 251 465 beschrieben. Der dort vorgeschlagene Skikern besteht aus mit Längsrillen versehenen Bandstücken aus thermoplastischem Kunststoff, die mit in Bandlängser-streckung variierender Dicke doppelkeilförmig ausgebildet sind. Mehrere solcher Kunststoff bandstücke sind miteinander zu einem Paket verklebt und bilden so den eine Doppelkeilform aufweisenden Skikern. Diese Kunststoffbandstücke sollen nun gemäß der genannten AT-PS von einem extrudierten Band abgelängt werden, wobei die Variation der Banddicke durch Variation der Abmessungen der Extrusionsdüsen während des Extrusionsvorganges erreicht werden soll. Die Herstellung eines extrudierten Stranges aus thermoplastischem Kunststoff mit in Stranglängserstrekkung variierendem Querschnitt konnte aber bisher nicht in befriedigender Weise gelöst werden. Der in der AT-PS 251 456 vorgeschlagene Skikern hat daher in der Praxis keinen Eingang gefunden.A ski core of the type mentioned above is described in AT-PS 251 465. The ski core proposed there consists of pieces of tape made of thermoplastic material which are provided with longitudinal grooves and which are of double-wedge shape with a thickness varying in the length of the tape. Several such plastic tape pieces are glued together to form a package and thus form the ski core having a double wedge shape. These plastic tape pieces are now to be cut to length from an extruded tape in accordance with the aforementioned AT-PS, the variation of the tape thickness being achieved by varying the dimensions of the extrusion nozzles during the extrusion process. The production of an extruded strand made of thermoplastic material with a cross-section that varies in the longitudinal direction of the strand has not yet been satisfactorily achieved. The ski core proposed in AT-PS 251 456 has therefore not been used in practice.
Darstellung der ErfindungPresentation of the invention
Der Erfindung liegt nun die Aufgabe zugrunde, einen Ski kern aus Kun s tstoff der eingangs genannten Art anzugeben, der auf besonders einfache Art hergestellt werden kann.The invention is based on the object of a ski to specify core made of plastic of the type mentioned at the outset, which can be produced in a particularly simple manner.
Diese Aufgabe wird in dem erfindungsgemäßen Skikern gelöst, der dadurch gekennzeichnet ist, daß er aus einem Schicht- oder plattenförmigen Ausgangsmaterial, welches aus einem fasermattenverstärkten duromeren oder thermoplastischen Kunststoff besteht, durch Fließpressen hergestellt ist, wobei das relative Hohlraumvolumen im Skikern zwischen 50 und 85, vorzugsweise aber zwischen 65 bis 75 Vol. % beträgt und/oder wobei vorzugsweise die Skikern-Seitenwangen durch das Fließpressen mit ausgebildet sind.This object is achieved in the ski core according to the invention, which is characterized in that it is produced from a layered or plate-shaped starting material, which consists of a fiber-mat-reinforced thermosetting or thermoplastic material, by extrusion molding, the relative cavity volume in the ski core being between 50 and 85, but is preferably between 65 to 75 vol.% and / or wherein the ski core side cheeks are preferably formed by the extrusion.
In einer vorteilhaften Ausgestaltung der Erfindung ist der erfindungsgemäße Skikern dadurch gekennzeichnet, daß er einen über zumindest nahezu die ganze Skikernbasisfläehe liegenden schichtförmigen Bereich aufweist, dessen Verlauf dem Verlauf der Trennfuge zwischen den Fließpreßformhälften entspricht. Dabei ist vorteilhaft der durchschnittliche Fasergehalt in den durch das Fließpressen mit ausgebildeten Seitenwangen kleiner als der durchschnittliche Fasergehalt in dem schichtförmigen Bereich.In an advantageous embodiment of the invention, the ski core according to the invention is characterized in that it has a layer-like region lying over at least almost the entire ski core base surface, the course of which corresponds to the course of the parting line between the extrusion mold halves. The average fiber content in the side cheeks formed by the extrusion is advantageously less than the average fiber content in the layered region.
Gemäß einer weiteren vorteilhaften Ausgestaltung des erf i ndu ng s gemäßen Skikerns grenzt der schichtförmige Bereich über seine ganze Ausdehnung oder über einen Teil seiner Ausdehnung an die Ober- oder Unterseite des Skikerns, wobei er vorteilhaft über einen Teil seiner Ausdehnung an die Oberseite und über einen anderen Teil an die Unterseite des Skikerns grenzt und dabei vorteilhaft einen wellenförmigen Verlauf zwischen Ober- und Unterseite aufweisen kann.According to a further advantageous embodiment of the ski core according to the invention, the layer-shaped region borders over its entire extent or over part of its extent to the top or bottom of the ski core, it advantageously over part of its extent to the top and over one other part borders on the underside of the ski core and can advantageously have a wavy course between the top and bottom.
Nach einer a n d e ren vorteilhaften Ausgestaltung des erf i nd u ng sgemäßen Skikerns sind die hohlraumfreien, sich über die ganze Skidicke erstreckenden Bereiche rippenförmig ausgebildet, wobei vorteilhaft mehrere solcher rippenförmig ausgebildeter Bereiche vorgesehen sind, die einander kreuzen.According to another advantageous embodiment of the ski core according to the invention, the cavity-free, are Regions extending over the entire thickness of the ski are rib-shaped, advantageously several such rib-shaped regions are provided which cross one another.
In noch einer anderen vorteilhaften Ausgestaltung der Erfindung ist der erfindungsgemäße Skikern dadurch gekennzeichnet, daß er zylindrische Hohlräume aufweist, die sich jeweils von der Ober- oder Unterseite des Skikerns bis an den schichtförmigen Bereich hin erstrecken.In yet another advantageous embodiment of the invention, the ski core according to the invention is characterized in that it has cylindrical cavities which each extend from the top or bottom of the ski core to the layered region.
Gemäß weiteren vorteilhaften Ausgestaltungen des erfindungsgemäßen Skikerns ist der thermoplastische Kunststoff des fasermattenverstärkten Ausgangsmaterials Polyäthylenterephthalat oder ein Polyamid oder es enthält dieser Kunststoff Polyäthylenterephthalat oder ein Polyamid.According to further advantageous refinements of the ski core according to the invention, the thermoplastic plastic of the fiber mat-reinforced starting material is polyethylene terephthalate or a polyamide, or this plastic contains polyethylene terephthalate or a polyamide.
In einer letzten vorteilhaften Ausgestaltung des erfindungsgemäßen Skikerns ist der duromere Kunststoff des Ausgangsmaterials ein Epoxydharz oder es enthält dieser Kunststoff ein Epoxydharz.In a last advantageous embodiment of the ski core according to the invention, the thermosetting plastic of the starting material is an epoxy resin or this plastic contains an epoxy resin.
Die Erfindung betrifft schließlich einen Ski, der einen Skikern gemäß der vorliegenden Erfindung enthält.Finally, the invention relates to a ski which contains a ski core according to the present invention.
Kurze Beschreibung der Zeichnungen im Zusammenhang mit einigen Wegen zur Ausführung der ErfindungBrief description of the drawings in connection with some ways of carrying out the invention
Die Erfindung wird nachstehend anhand der Figuren näher arl äutert.The invention is explained in more detail below with reference to the figures.
Die Figuren 1 und 2 zeigen eine erste vorteilhafte Realisierung des erfindunngsgemäßen Skikerns in zwei Teildarstellungen und zwar Fig. 1 im Längsschnitt gemäß der Linie 1-1 in Fig. 2 und in Fig.2 im Schnitt längs der Linie I I - I I i n F i g . 1 .FIGS. 1 and 2 show a first advantageous realization of the ski core according to the invention in two partial representations, namely FIG. 1 in a longitudinal section along the line 1-1 in FIG. 2 and in FIG. 2 in a section along the line II - II in fig. 1 .
Der Skikern 1 weist an seiner Unterseite 2 angrenzend einen schichtförmigen Bereich 3 auf, der sich über die ganze Skikernbasisfläche erstreckt. Er enthält ferner gemäß einem regelmäßigen Raster angeordnete zylindrische Hohlräume 4, die sich von der Sk i kern-Ober se i te 5 bis an den schichtförmigen Bereich 3 hin erstrecken. Die Figuren 1 und 2 zeigen den Skikern in einem mittleren Bereich, in dem er z.B. gegen das hintere Skiende zu (d.h. in Fig. 1 in Richtung des Pfeiles 6) in seiner Dicke keilförmig abnimmt.The ski core 1 has on its underside 2 adjoining a layer-shaped region 3 which extends over the entire base area of the ski core. It also contains cylindrical cavities 4 arranged according to a regular grid, which extend from the core of the core 5 to the layer-shaped region 3. Figures 1 and 2 show the ski core in a central area in which it e.g. towards the rear end of the ski (i.e. in Fig. 1 in the direction of arrow 6) decreases in thickness in a wedge shape.
Als Ausgangsmaterialien zur Herstellung der Sk i kerne dienen insbesondere Platten aus glasfasermattenverstärkten thermoplastischen Kunststoffen, die vorzugsweise aus einem Polyamid oder aus einem Polyäthylenterephthalat bestehen können. Dabei haben die eingesetzten Polyamidplatten vorzugsweise einen Glasgehalt im Bereich von 20 bis 40 Gew.%, während Polyäthylenterephthalatplatten vorzugsweise mit einem Glasgehalt im Bereich von 15 bis 35 Gew.% verwendet werden.The starting materials for the production of the ski cores are, in particular, plates made of glass fiber-reinforced thermoplastic materials, which can preferably consist of a polyamide or a polyethylene terephthalate. The polyamide sheets used preferably have a glass content in the range from 20 to 40% by weight, while polyethylene terephthalate sheets are preferably used with a glass content in the range from 15 to 35% by weight.
Die Herstellung des Skikerns gemäß der Figuren 1 und 2 sei nachstehend anhand der Figuren 3 bis 5 erläutert.The manufacture of the ski core according to FIGS. 1 and 2 is explained below with reference to FIGS. 3 to 5.
Zur Herstellung des Skikerns oder eines S k ikernabschnittes dient eine Fließpreßform, wie sie in Fig. 3 in einer schematischen Qu er s ch n i tt s - Te ildarstellung in geöf f n etem Zustand gezeigt ist. Die Fließpreßform umfaßt eine als Matrize ausgebildete untere Formhälfte 7 und eine als Patrize wirkende obere Formhälfte 8 mit zylindrischen Vorsprüngen 9. Die beiden Formhälften werden durch Wasserkühlung auf Raumtemperatur gehalten. Ein auf Maß zugeschnittener Streifen 10 des Ausgangsmaterials aus einem glasmattenverstärkten Polyamid m i t einem Glasgehalt von z.B. 30 Gew.% wird auf die Verformungstemperatur von 280°C gebracht. Bei dieser Temperatur ist das Matrixharz zwar an sich schon flüssig; der Glasfasergehalt hält den Streifen 10 aber in einem plastischen, gut hantierbaren Zustand.An extrusion mold is used to produce the ski core or a ski core section, as is shown in FIG. 3 in a schematic cross-sectional partial representation in an open state. The extrusion mold comprises a lower mold half 7 designed as a female mold and an upper mold half 8 acting as a male mold with cylindrical projections 9. The two mold halves are kept at room temperature by water cooling. A tailor-made strip 10 of the starting material made of a glass mat-reinforced polyamide with a glass content of, for example, 30% by weight is brought to the deformation temperature of 280 ° C. At this temperature, the matrix resin itself is already liquid; the glass fiber content keeps the strip 10 in a plastic, easy to handle condition.
Der Streifen 10 wird nun in die untere Formhälfte 7 eingelegt und dort fixiert. Er ist so zugeschnitten, daß sein Rand 11 nicht ganz bis zum Rand 12 der Sohle 13 der unteren Formhälfte 7 reicht. Unmittelbar nach dem Einlegen des Streifens 10 wird die Form durch Absenken der oberen Formhälfte 8 geschlossen, wobei die Schließzeit etwa 3 Sekunden beträgt. Fig. 4 zeigt die Form während des Schließvorganges. Die in den Ausgangsmaterialstreifen 10 eindringenden zylindrischen Vorsprünge 9 der oberen Fόrmhälfte 8 verdrängen nun das Fließpreßmaterial, welches in den Zwischenräumen 14 zwischen den Vorsprüngen 9 bzw. im Randbereich 15 des Formraumes hochsteigt. Bei geschlossener Form, bei der der Rand 16 der oberen Formhälfte 8 in die untere Formhälfte 7 eintaucht, ist der Formraum schließlich durch das Fließpreßmaterial vollständig ausgefüllt.The strip 10 is now inserted into the lower mold half 7 and fixed there. It is cut so that its edge 11 does not extend all the way to the edge 12 of the sole 13 of the lower mold half 7. Immediately after the strip 10 has been inserted, the mold is closed by lowering the upper mold half 8, the closing time being approximately 3 seconds. Fig. 4 shows the shape during the closing process. The cylindrical protrusions 9 of the upper mold half 8 penetrating into the starting material strips 10 now displace the extruded material which rises in the spaces 14 between the protrusions 9 or in the edge region 15 of the molding space. When the mold is closed, in which the edge 16 of the upper mold half 8 dips into the lower mold half 7, the molding space is finally completely filled by the extruded material.
Der Preßling wird nun etwa 30 Sekunden in der Form belassen, während er auf etwa 50°C auskühlt und dabei erstarrt, wonach er als fertiger Skikern 1 oder Skikernabschnitt, wie er in Fig. 5 im Querschnitt dargestellt ist, der Form entnommen wird.The compact is now left in the mold for about 30 seconds while it cools to about 50 ° C. and solidifies, after which it is removed from the mold as a finished ski core 1 or ski core section, as shown in cross section in FIG. 5.
Die Erfahrung hat gezeigt, daß bei dem beschriebenen Herstellungsbeispiel im fließgepreßten Material, z.B. bei einem Fließweg von 10 cm, der Glasfasergehalt nur um wenige Prozente absinkt. Da die Glasfasern sich an der Ober- fläche des Preßlings abbilden, kann es in manchen Fällen vorteilhaft sein, den Glasfasergehalt in den Seitenwangen 17 des Skikerns 1, deren Oberflächen ja mit die äußere Oberfläche des Skis bilden, aus dekorativen Gründen niedriger zu halten, als er sich in dem schichtförmigen Skikern-Bereich 3 im Mittel einstellt. Dies kann dadurch erreicht werden, daß man (siehe Fig. 3) den Abstand des Randes 11 des Ausgangsmaterial-Streifens 10 vom Rand 12 der Sohle 13 der unteren Formhälfte 7 vergrößert. Der daraus resultierende größere Fließweg des Materials bedingt dann einen verringerten Glasfasergehalt in den Seitenwangen 17.Experience has shown that in the production example described in the extruded material, for example with a flow path of 10 cm, the glass fiber content only drops by a few percent. Since the glass fibers map surface of the compact, it can be advantageous in some cases to keep the glass fiber content in the side cheeks 17 of the ski core 1, the surfaces of which form the outer surface of the ski, for decorative reasons than it is in the layered ski core area 3 sets on average. This can be achieved by (see FIG. 3) increasing the distance between the edge 11 of the starting material strip 10 and the edge 12 of the sole 13 of the lower mold half 7. The resulting larger flow path of the material then results in a reduced glass fiber content in the side walls 17.
Verwendet man zum Herstellen des erfindungsgemäßen Skikerns als Matrixkunststoff Polyäthylenterephtha lat, so können z.B. aus demselben Ausgangsmaterial, das bei derselben Verformungstemperatur von 300°C eingesetzt wird, durch unterschiedliche Abkühlbedingungen Skikerne mit unterschiedlichen mechanischen Eigenschaften erzeugt werdenIf polyethylene terephthalate is used as matrix plastic to produce the ski core according to the invention, e.g. Ski cores with different mechanical properties can be produced from the same starting material, which is used at the same deformation temperature of 300 ° C, under different cooling conditions
Bei der Verwendung einer wassergekühlten Form, die auf einer Temperatur im Bereich zwischen 10 und 30°C gehalten wird, erhält man aus einem plattenförmigen Ausgangsmaterial aus glasfasermatteπverstärktem Polyäthylenterephthalat einen Preßling, in dem sich das Matrixharz wegen der relativ raschen Abkühlung in einer weitgehend amorphen Struktur verfestigt. Aufgrund dieser amorphen Struktur des Matrixharzes weist der Skikern eine hohe Elastizität auf.When using a water-cooled mold, which is kept at a temperature in the range between 10 and 30 ° C, a compact is obtained from a plate-shaped starting material made of glass fiber mat reinforced polyethylene terephthalate, in which the matrix resin solidifies in a largely amorphous structure due to the relatively rapid cooling . Due to this amorphous structure of the matrix resin, the ski core has a high elasticity.
Will man hingegen einen Skikern mit einer höheren mechanischen Steifigkeit herstellen, kann man dies dadurch realisieren, daß man beim Fließpressen desselben Ausgangsmaterials eine beheizte Form verwendet, die auf einer Temperatur von etwa 150°C gehalten wird. Der Preß ling wird dabei also relativ langsam auf eine Temperatur, die etwas über 150°C liegt, abgekühlt, wobei das Matrixharz in eine weitgehend kristalline Struktur übergeht, aufgrund der dann die höhere Steifigkeit des Skikerns resultiert.If, on the other hand, you want to produce a ski core with a higher mechanical rigidity, this can be achieved by using a heated mold when extruding the same starting material, which mold is kept at a temperature of about 150 ° C. The press ling is thus cooled relatively slowly to a temperature which is somewhat above 150 ° C., the matrix resin changing into a largely crystalline structure, which then results in the higher rigidity of the ski core.
Gemäß einer vorteilhaften Variante des erfindungsgemäßen Skikerns ist dieser auf Basis eines duromeren Kunststoffes, insbesondere eines Epoxydharzes hergestellt. Dabei geht man vorteilhaft von einer mit einem Epoxydharz-Här-tergemisch imprägnierten Glasfasermatte aus, zu deren Herstellung man z.B. eine genadelte, aus Endlosfasern aufgebaute Glasfasermatte mit einem Flächengewicht von 600 g/m2 mit einem Epoxydharz-Härtergemisch, welches vorteilhaft ein Epoxydharz auf Basis von Bisphenol A und einen diaminischen Härter enthält, mit einem Auftrag von 500 g/m2 (Feststoff) imprägniert. Für die Herstellung des Skikerns wird eine Fließpreßform verwendet, welche ähnlich aufgebaut ist, wie anhand der Figuren 3 und 4 erläutert. Ein Zuschnitt der imprägnierten Glasfasermatte wird sehr rasch, z.B. während einer Minute, auf eine Temperatur von 120°C gebracht und dann unmittelbar in die auf 140°C gehaltene Preßform eingebracht, welche dann geschlossen wird. Das Material der imprägnierten Glasmatte, das , ähnlich wie anhand von Fig. 4 beschrieben, den Formräum schließlich vollständig ausfüllt, wird nun während ca. 4 min in der Fließpreßform dabei belassen und gehärtet. Danach wird der Preßling als fertiger Skikern oder Skikernabschnitt heiß ausgeformt. Ein solcher Skikern a uf Basis von glasfasermattenverstärktem Epoxydharz weist bei sonst gleichem Aufbau im allgemeinen eine höhere Steifigkeit auf, als bei Verwendung eines thermoplastischen Kunstharzes erzielbar ist.According to an advantageous variant of the ski core according to the invention, it is produced on the basis of a thermoset plastic, in particular an epoxy resin. This is advantageously based on a glass fiber mat impregnated with an epoxy resin hardener mixture, for the manufacture of which, for example, a needled glass fiber mat composed of continuous fibers with a basis weight of 600 g / m 2 with an epoxy resin hardener mixture, which is advantageously an epoxy resin based contains bisphenol A and a diaminic hardener, impregnated with an order of 500 g / m 2 (solid). For the production of the ski core, an extrusion mold is used, which is constructed similarly to that explained with reference to FIGS. 3 and 4. A cut of the impregnated glass fiber mat is brought to a temperature of 120 ° C. very quickly, for example for one minute, and then introduced directly into the mold, which is kept at 140 ° C., which is then closed. The material of the impregnated glass mat, which, as described with reference to FIG. 4, finally fills the mold space completely, is left in the extrusion mold for about 4 minutes and hardened. The compact is then hot-formed as a finished ski core or ski core section. Such a ski core on the basis of glass fiber reinforced epoxy resin generally has a higher rigidity with an otherwise identical construction than can be achieved when using a thermoplastic synthetic resin.
Eine zweite vorteilhafte Realisierung des erfindungsgemä ßen Skikerns sei nachstehend anhand der Figuren 6 bis 8 erläutert. Dieser Skikern ist aus zwei keilförmig ausgebildeten Halbkernen aufgebaut, die an ihren stärkeren Enden miteinander verbunden werden.A second advantageous realization of the ß ski core will be explained below with reference to Figures 6 to 8. This ski core is made up of two wedge-shaped half-cores that are connected to each other at their stronger ends.
Die Figuren 6 und 7 zeigen nun einen dieser beiden SkiHalbkerne 18 in zwei Teildarstellungen im Bereich des stärkeren Endes 19 und zwar Fig. 6 im Längsschnitt gemäß der Linie VI-VI in F i g . 7 u nd i n F i g . 7 i m Gru nd r i ß .FIGS. 6 and 7 now show one of these two ski half-cores 18 in two partial representations in the region of the stronger end 19, namely FIG. 6 in a longitudinal section along the line VI-VI in FIG. 7 and 1 f. 7 in the basics.
Dieser Ski-Halbkern 18 weist einen zwischen seiner Oberund Unterseite 20, 21 in Trapezwellenform verlaufenden schichtförmigen Bereich 22 auf, der sich über seine ganze Basisfläche erstreckt. Außerdem umfaßt er in Skilängsrϊchtung verlaufende rippenförmige Bereiche 23 sowie Seitenwangen 24, die sich jeweils über die ganze Skikerndikke erstrecken. Fig. 8 zeigt den Ski-Halbkern 18 in einer Längsschnitt-Teildarstellung im Bereich seines schwächeren Endes 25.This ski half-core 18 has a layer-shaped region 22 which runs in a trapezoidal wave shape between its upper and lower sides 20, 21 and extends over its entire base surface. In addition, it comprises rib-shaped regions 23 extending in the longitudinal direction of the ski and side cheeks 24, each of which extends over the entire length of the ski. 8 shows the half ski core 18 in a partial longitudinal section in the region of its weaker end 25.
Zur Herstellung dieses Ski-Halbkerns 18 dient ei.ne Fließpreßform, bei welcher, analog wie anhand der Figuren 3 und 4 erläutert, die Trennfuge zwischen den Fließpreßformhälften dem Verlauf des schichtförmigen Bereiches 22 entspricht.To produce this ski half-core 18, an extrusion mold is used, in which, analogously as explained with reference to FIGS. 3 and 4, the parting line between the extrusion mold halves corresponds to the course of the layered region 22.
In Abänderung, dieser zweiten vorteilhaften Realisierung des Skikerns können die Halbkerne statt der in Skilängserstreckung verlaufenden rippenförmigen Bereiche 23 rippenförmige Bereiche aufweisen, die schräg zur Skilängserstreckung verlaufen. In diesen Falle bilden diese rippenförmigen Bereiche zwei Gruppen jeweils zueinander parallel verlaufenden Rippen, wobei jeweils eine Rippe d e r einen Gruppe mehrere Rippen der anderen Gruppe kreuzt. Ein unter Verwendung solcher Halbkerne aufgebauter Ski weist dann eine höhere Torsi onssteifigkeit auf als ein Ski mit Halbkernen gemäß der Figuren 6 und 7.In a modification of this second advantageous realization of the ski core, instead of the rib-shaped regions 23 which run in the longitudinal direction of the ski, the half-cores can have rib-shaped regions which run obliquely to the longitudinal direction of the ski. In this case, these rib-shaped regions form two groups of ribs running parallel to one another, one rib of one group crossing several ribs of the other group. A ski constructed using such half cores then has a higher torsional rigidity than a ski with half cores according to FIGS. 6 and 7.
Gewerbliche VerwertbarkeitCommercial usability
Der erfindungsgemäße Skikern, bei dessen Herstellung in vorteilhafter Weise praktisch kein Materialabfall entsteht, eignet sich vorzugsweise für eine Massenproduktion. Wegen der weitgehenden Freiheit in der Formgebung können seine mechanischen Eigenschaften besser an die an den fertigen Ski gestellten Anforderungen angepaßt werden, als es bei den bis jetzt bekannten Skikernen der Fall ist. Der erfindungsgemäße Skikern hat auch den Vorteil, daß er gleich gemeinsam mit den Skikern-Seitenwangen in demselben Arbeitsgang hergestellt werden kann. The ski core according to the invention, in the production of which practically no material waste advantageously occurs, is preferably suitable for mass production. Because of the extensive freedom in terms of shape, its mechanical properties can be better adapted to the requirements placed on the finished ski than is the case with the ski cores known to date. The ski core according to the invention also has the advantage that it can be produced together with the ski core sidewalls in the same operation.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
Skikern aus Kunststoff mit Hohlräumen zur Gewichtsverminderung, wobei, über das Skikernvolumen verteilt, hohlraumfreie Bereiche bestehen, die sich jeweils über die ganze Skikerndicke erstrecken, dadurch gekennzeichnet, daß er aus einem schicht- oder plattenförmigen Ausgangsmaterial, welches aus einem fasermattenverstärkten duromeren- oder thermoplastischen Kunststoff besteht, durch Fließpressen hergestellt ist.Ski core made of plastic with cavities for weight reduction, whereby, distributed over the ski core volume, there are void-free areas, each of which extends over the entire thickness of the ski core, characterized in that it consists of a layered or plate-shaped starting material, which is made of a fiber mat reinforced thermosetting or thermoplastic plastic is made by extrusion.
2. Skikern nach Anspruch 1, d ad u rch gekennzeichnet, daß das relative Hohlraumvolumen im Skikern (1, 18) zwischen 50 und 80, vorzugsweise aber zwischen 65 und 75 Vol.% beträgt.2. Ski core according to claim 1, d ad u rch characterized in that the relative cavity volume in the ski core (1, 18) is between 50 and 80, but preferably between 65 and 75 vol.%.
3. Skikern nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Skikern-Seitenwangen (17, 24) durch das Fließpressen mit ausgebildet sind.3. Ski core according to claim 1 or 2, characterized in that the ski core side cheeks (17, 24) are formed by the extrusion.
Skikern nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß er einen über zumindest nahezu der ganzen Skikernbasisfläche liegenden schichtförmigen Bereich (3, 22) aufweist, dessen Verlauf dem Verlauf der Trennfuge zwischen den Fließpreßformhälften (7, 8) entspricht.Ski core according to one of claims 1 to 3, characterized in that it has a layer-shaped region (3, 22) lying over at least almost the entire ski core base surface, the course of which corresponds to the course of the parting line between the extrusion mold halves (7, 8).
Skikern nach Anspruch 4, dadurch gekennzeichnet, daß der durchschnittliche Fasergehalt in den durch das Fließpressen mit ausgebildeten Seitenwangen (17, 24) kleiner ist als der durchschnittliche Fasergehalt in dem schichtförmigen Bereich (3, 22).Ski core according to Claim 4, characterized in that the average fiber content in the side cheeks (17, 24) formed by the extrusion is smaller than the average fiber content in the layered region (3, 22).
Skikern nach Anspruch 4 oder 5, dadurch gekennzeich zeichnet, daß der schichtförmige Bereich (3, 22) über seine ganze Ausdehnung oder über einen Teil seiner Ausdehnung an die Ober- oder Unterseite des Skikerns grenzt.Ski core according to claim 4 or 5, characterized shows that the layer-shaped area (3, 22) borders over its entire extent or over part of its extent to the top or bottom of the ski core.
7. Skikern nach Anspruch 6, dadurch gekennzeichnet, daß der schichtförmige Bereich (22) über einen Teil seiner Ausdehnung an die Oberseite (20) und über einen anderen Teil an die Unterseite (21) des Skikerns (18) grenzt.7. Ski core according to claim 6, characterized in that the layer-shaped region (22) borders over part of its extent to the top (20) and over another part to the bottom (21) of the ski core (18).
8. Skikern nach Anspruch 7, dadurch gekennzeichnet, daß der schichtförmige Bereich (22) einen wellenförmigen Verlauf zwischen Ober- und Unterseite (20, 21) aufweist.8. Ski core according to claim 7, characterized in that the layer-shaped region (22) has a wavy course between the top and bottom (20, 21).
9. Skikern nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die hohlraumfreien, sich über die ganze Skikerndicke erstreckenden Bereiche (23) rippenförmig ausgebildet sind.9. Ski core according to one of claims 1 to 8, characterized in that the void-free, extending over the entire thickness of the ski core areas (23) are rib-shaped.
10. Skikern nach Anspruch 9, dadurch gekennzeichnet, daß mehrere solcher rippenförmig ausgebildeter Bereiche vorgesehen sind, die einander kreuzen.10. Ski core according to claim 9, characterized in that several such rib-shaped areas are provided which cross each other.
11. Skikern nach einem der Ansprüche 4 bis 10, dadurch gekennzeichnet, daß er zylindrische Hohlräume (4) aufweist, die sich jeweils von der Ober- oder Unterseite (5) des Skikerns (1) bis an den schichtförmigen Bereich (3) hin erstrecken.11. Ski core according to one of claims 4 to 10, characterized in that it has cylindrical cavities (4) which each extend from the top or bottom (5) of the ski core (1) to the layered region (3) .
12. Skikern nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß der thermoplastische Kunststoff des f a s errna t ten ver s t a r kte n Ausgangsmaterials Polyäthylenterephthalat ist oder enthält. 12. Ski core according to one of claims 1 to 11, characterized in that the thermoplastic of the fas errna t ten ver star kte n starting material is or contains polyethylene terephthalate.
13. Skikern nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß der thermoplastische Kunststoff des fasermattenverstärkten Ausgangsmaterials ein Polyamid ist oder enthält.13. Ski core according to one of claims 1 to 11, characterized in that the thermoplastic material of the fiber mat-reinforced starting material is or contains a polyamide.
14. Skikern nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß der duromere Kunststoff des Ausgangsmaterials ein Epoxydharz ist oder enthält.14. Ski core according to one of claims 1 to 11, characterized in that the thermosetting plastic of the starting material is or contains an epoxy resin.
15. Ski dadurch gekennzeichnet, daß er einen Skikern nach einem der Ansprüche 1 bis 14 enthält. 15. Ski characterized in that it contains a ski core according to one of claims 1 to 14.
PCT/AT1986/000011 1985-02-07 1986-02-07 Ski core of plastic material and ski containing such a core WO1986004512A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT86901006T ATE64867T1 (en) 1985-02-07 1986-02-07 PLASTIC SKI KERNELS AND SKI CONTAINING THESE SKI KERNELS.
DE8686901006T DE3680044D1 (en) 1985-02-07 1986-02-07 SKI CORE MADE OF PLASTIC AND SKIS CONTAINING THIS SKI CORE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA356/85 1985-02-07
AT0035685A AT386959B (en) 1985-02-07 1985-02-07 METHOD FOR PRODUCING A COMPONENT FOR A SKI CORE, COMPONENT PRODUCED WITH THIS METHOD, AND SKI WITH SUCH A COMPONENT

Publications (1)

Publication Number Publication Date
WO1986004512A1 true WO1986004512A1 (en) 1986-08-14

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PCT/AT1986/000011 WO1986004512A1 (en) 1985-02-07 1986-02-07 Ski core of plastic material and ski containing such a core

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EP (1) EP0211050B1 (en)
JP (1) JPS62501613A (en)
AT (2) AT386959B (en)
DE (1) DE3680044D1 (en)
WO (1) WO1986004512A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720289A1 (en) * 1994-05-31 1995-12-01 Gaillon Ski with transparent upper surface with decoration underneath
WO2003008052A1 (en) * 2001-07-10 2003-01-30 Fischer Gesellschaft M.B.H. Light structural core and method for the production thereof
US7077418B2 (en) 2001-07-10 2006-07-18 Fischer Gesellschaft M.B.H. Light-weight construction core and a method for producing the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT399819B (en) * 1991-04-17 1995-07-25 Pichler Hubert Ski with reduced flexural vibrations
US5848800A (en) * 1993-06-09 1998-12-15 Kastle Aktiengesellschaft Ski

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1254377A (en) * 1960-04-20 1961-02-17 Metallic ski
FR1453516A (en) * 1965-08-13 1966-06-03 Honeycomb ski
FR2005056A1 (en) * 1968-03-29 1969-12-05 Bader Albert
DE2151944A1 (en) * 1970-10-23 1972-04-27 Bennett Brothers Associates In Pressed ski
FR2261027A1 (en) * 1974-02-19 1975-09-12 Baudou Antoine Method of mfg. skis by moulding in two stages - uses mesh core and metallic reinforcing being included
US3970324A (en) * 1973-03-05 1976-07-20 American Marine Industries, Inc. Foam-filled, cellular structural product
DE2541073A1 (en) * 1975-09-15 1977-03-17 Voelkl Ohg Franz Ski with timber coe and strong faces - having fabricated core filled with GRP pressed between stiffening materials

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT309282B (en) * 1970-03-02 1973-08-10 Head Sportgeraete Gmbh Plastic skis

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1254377A (en) * 1960-04-20 1961-02-17 Metallic ski
FR1453516A (en) * 1965-08-13 1966-06-03 Honeycomb ski
FR2005056A1 (en) * 1968-03-29 1969-12-05 Bader Albert
DE2151944A1 (en) * 1970-10-23 1972-04-27 Bennett Brothers Associates In Pressed ski
US3970324A (en) * 1973-03-05 1976-07-20 American Marine Industries, Inc. Foam-filled, cellular structural product
FR2261027A1 (en) * 1974-02-19 1975-09-12 Baudou Antoine Method of mfg. skis by moulding in two stages - uses mesh core and metallic reinforcing being included
DE2541073A1 (en) * 1975-09-15 1977-03-17 Voelkl Ohg Franz Ski with timber coe and strong faces - having fabricated core filled with GRP pressed between stiffening materials

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720289A1 (en) * 1994-05-31 1995-12-01 Gaillon Ski with transparent upper surface with decoration underneath
WO2003008052A1 (en) * 2001-07-10 2003-01-30 Fischer Gesellschaft M.B.H. Light structural core and method for the production thereof
US7077418B2 (en) 2001-07-10 2006-07-18 Fischer Gesellschaft M.B.H. Light-weight construction core and a method for producing the same

Also Published As

Publication number Publication date
EP0211050B1 (en) 1991-07-03
ATE64867T1 (en) 1991-07-15
EP0211050A1 (en) 1987-02-25
ATA35685A (en) 1988-04-15
DE3680044D1 (en) 1991-08-08
JPS62501613A (en) 1987-07-02
AT386959B (en) 1988-11-10

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