EP2247222B1 - Structure porteuse, procédé de fabrication et utilisation d une telle structure porteuse - Google Patents

Structure porteuse, procédé de fabrication et utilisation d une telle structure porteuse Download PDF

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Publication number
EP2247222B1
EP2247222B1 EP09712815A EP09712815A EP2247222B1 EP 2247222 B1 EP2247222 B1 EP 2247222B1 EP 09712815 A EP09712815 A EP 09712815A EP 09712815 A EP09712815 A EP 09712815A EP 2247222 B1 EP2247222 B1 EP 2247222B1
Authority
EP
European Patent Office
Prior art keywords
support structure
core
density
structure according
casing
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.)
Not-in-force
Application number
EP09712815A
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German (de)
English (en)
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EP2247222A1 (fr
Inventor
Herbert Börger
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.)
Covestro Thermoplast Composite GmbH
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Thermoplast Composite GmbH
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Filing date
Publication date
Application filed by Thermoplast Composite GmbH filed Critical Thermoplast Composite GmbH
Priority to SI200930245T priority Critical patent/SI2247222T1/sl
Publication of EP2247222A1 publication Critical patent/EP2247222A1/fr
Application granted granted Critical
Publication of EP2247222B1 publication Critical patent/EP2247222B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C23/00—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases
    • A47C23/06—Spring mattresses with rigid frame or forming part of the bedstead, e.g. box springs; Divan bases; Slatted bed bases using wooden springs, e.g. of slat type ; Slatted bed bases
    • A47C23/061—Slat structures
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/10—Frames made of non-metallic materials, other than wood
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/10—Non-metallic shafts
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
    • A63B59/70—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00 with bent or angled lower parts for hitting a ball on the ground, on an ice-covered surface, or in the air, e.g. for hockey or hurling
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/08—Handles characterised by the material
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/10—Handles with means for indicating correct holding positions
    • 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
    • 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
    • A63C5/126—Structure of the core
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/24—Ice hockey
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A63B2209/023—Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A63B2209/026—Ratio fibres-total material
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames

Definitions

  • the invention relates to a support structure according to the preamble of claim 1. Furthermore, the invention relates to a method for producing such a support structure and to a use of such a support structure.
  • Support structures of the type mentioned are known from the DE-PS 1,119,503 , of the DE 298 16 638 U 1 and the DE 84 32 781 U1 .
  • Other support structures are known from the DE 100 60 379 A1 , of the DE 10 2006 023 865 A1 , of the EP 0 473 372 A2 and the US 2006/0131437 A1 ,
  • a compound of natural or wood fibers with acrylate resin offers the possibility of predetermining the core density via a compression of such a core in the as yet uncured state.
  • the wood fibers of the support structure according to the invention may be wood fibers which have been freed from a binding matrix.
  • the wood starting material can be derived from the cellulose fibers of the Partially or practically completely liberated wood binding lignin.
  • the compound of the natural or wood fibers with the acrylate resin can be done by embedding the fibers in the resin.
  • the acrylate resin can also be used as a binder between the natural or wood fibers.
  • the support structure can therefore be equipped, where it is exposed to greater loads, with a denser and thus more resilient core.
  • the sheath is preferably made of an organic sheet, that is of a thermoplastic high-performance fiber composite plastic.
  • fibers may be used in the form of endless or spun and in particular highly oriented glass fibers, natural fibers, synthetic fibers or carbon fibers.
  • a polymer matrix of the fiber reinforced plastic of the enclosure may be selected from a suitable thermoplastic material, for example polypropylene, polyamide, a thermoplastic polyester or a blend of different polymers.
  • polybutylene terephthalate PBT
  • polyethylene terephthalate PET
  • polyethersulfone acrylonitrile-butadiene-styrene
  • ABS acrylonitrile-butadiene-styrene
  • ASA acrylic ester-styrene-acrylonitrile
  • SAN styrene-acrylonitrile
  • the acrylate resin used as the matrix for the core fibers can be, in particular, Acrodur® from BASF AG.
  • the core made of the natural or wood fibers remains sufficiently porous so that the matrix of the fiber-reinforced plastic forming the cladding penetrates into these pores for the intimate connection of the cladding with the core can.
  • natural fibers in addition to wood fibers, for example, seed fibers such as cotton, bast fibers such as hemp, jute, linen or ramie, other resin fibers such as sisal or manila or fruit fibers such as coconut can be used.
  • the varying core density along the support structure causes the support structure in the longitudinal direction can be well adapted to changing load conditions. In the case of a carrier, for example, the core density in the region of force introduction points or fastening sections can be purposefully increased.
  • From the top centrally loaded cross member may, for example, in the middle have a higher density than the edge.
  • the density of the core is adapted to the respective load conditions of this functional component. The result is the possibility of an easily and inexpensively executable support structure.
  • An acrylate-resin content according to claim 2 gives a particularly good loadable core.
  • a continuous density variation according to claim 3 allows an optimized density adjustment of the core so that it is actually reinforced only in those areas which require such reinforcement due to the loading requirements. Upon reaching predetermined load requirements, an optimally lightweight support structure is achieved in this way.
  • a graduated density variation according to claim 4 facilitates the manufacture of the support structure.
  • a core density range according to claim 5 has been found to be particularly well suited for many practical loading requirements.
  • the core density varies between 450 g / l and 850 g / l, more preferably between 500 g / l and 1000 g / l.
  • Typical moduli of elasticity resulting from these density ranges are between 1,750 MPa and 3,100 MPa.
  • Bending stress values ⁇ lie at values between 18 MPa and 31 MPa for these density ranges.
  • a cross-sectional variation of the support structure according to claim 6 allows an additional geometric adaptation to the respective load requirements.
  • Fiber lengths according to claim 7 have been found to be particularly suitable for achieving a durable and resilient core.
  • the fibers have a typical diameter in the range between 10 microns and 150 microns.
  • very thin fibers for example with a fiber diameter between 10 .mu.m and 30 .mu.m, or strong fibers, for example with a diameter in the range between 100 .mu.m and 150 .mu.m, may be preferred.
  • An enclosure according to claim 8 has surprisingly been found to be sufficient to ensure the required in practice for the support structure according to the invention additional load absorption and protective effect by the enclosure.
  • the wrapper may have a thickness of 0.8 mm.
  • An enclosure according to claim 9 allows an additional load adjustment along the support structure over the envelope thickness.
  • a wrapper according to claim 10 is an inexpensive variant of a wrapper of varying thickness.
  • a supporting structure according to claim 11 combines the advantages of a load-bearing structure matched by the covering thickness with those of a supporting structure of constant external cross-section.
  • load-adapted laminate thicknesses adapted to their thickness can be used.
  • the support structure can be used wherever a varying outer cross-section would interfere, especially where space is scarce or where good stackability of the support structure is required. In addition, this allows a cost-effective continuous production of the support structure as a particular endless profile strand.
  • a constant basis weight core layer according to claim 12 may have an over-level loading capability over a varying density perpendicular to the plane in which the constant basis weight is present or over an envelope thickness varying in that plane.
  • the support structure can be used wherever it represents a ballast that must not exceed a given weight per unit area.
  • the core may have a hollow chamber extending along the support structure.
  • a hollow chamber design increases the surface of the core, which can be used to advantage for core drying after the molding of this.
  • the covering can in particular take place at the same time as a shaping core pressing. This reduces the production cost.
  • the core may have at least two separate core sections. Such separate core sections provide a further degree of freedom for load adjustment of the support structure. Where a higher load has to be absorbed, several, for example, juxtaposed Core sections may be provided. The core sections may in particular have different lengths. Another object is to specify a production method for the support structure according to the invention. This object is achieved by the method according to claims 15 and 16.
  • a density variation for the support structure according to the invention can be specified exactly by stacking prepregs, ie natural or wood fibers preimpregnated with the uncured acrylate resin. Depending on the density and depending on the dimensions of the individual prepregs forming the stack, a defined density variation results after the pressing along the support structure. The wrapping of the core produced by the compression is usually carried out after the pressing.
  • the desired density variation is produced via a corresponding variation of the basis weight of the fiber mat.
  • the two methods according to claims 15 and 16 can also be combined with each other.
  • a fiber mat of continuously varying basis weight may be part of a prepreg stack.
  • the envelope may be designed to be plastically deformable, so that the envelope, for example, variably compensates a cross-sectional variation of the core over a longitudinal dimension of the support structure.
  • the prepreg stack can be crimped in a single step to the core of the support structure.
  • the pressing temperature of the prepreg stack may be greater than 150 ° C, greater than 200 ° C and may, for example 250 ° C.
  • the temperature of the pressing tool may be significantly lower than the temperature of the prepreg stack and may for example be less than 150 ° C, less than 100 ° C and may for example be 70 ° C.
  • Uses according to claim 17 exemplify the advantages of a load-adapted density variation of the core of the support structure.
  • the center of the slat in particular has an increased core density, so that the slat is particularly resistant to bending in its center.
  • battens with different maximum stiffnesses, matching the required stiffnesses in the shoulder and pelvic region on the one hand, and in the head and foot region of a slatted frame, on the other hand.
  • These different types of slats can be provided with identical dimensions, so that only one type of slat shots needs to be used regardless of the type of slat used.
  • a ski this is equipped in particular in the binding area with increased core density.
  • This increased core density can be generated, for example, by increased lateral compression in the production of the core of the support structure in the region of the sidecut. This ensures that, especially in the binding area, the core density is increased due to the greater compression.
  • a ski may be equipped in a fastening region, for example for bonding with increased core density.
  • an additional prepreg layer can be placed exactly before the pressing where it is intended to screw the binding to the main body of the ski.
  • a sufficient pull-out force can be provided without additional measures, so that fastening screws can be screwed directly into this fastening area.
  • Fig. 1 shows a bar 1 of a bedframe otherwise not shown for a bed frame.
  • the bar 1 is shown in a longitudinal section.
  • a longitudinal axis of the bed frame is perpendicular to the plane of the Fig. 1 ,
  • the lath 1 represents a first example of a support structure according to the invention.
  • the lath 1 has a core 2, which is in the Fig. 1 schematically represented by hatching natural or wood fibers 3, which are embedded in a matrix of acrylate resin 4.
  • the core 2 has a content of acrylate resin 4 ranging between 8% by weight and 25% by weight.
  • the natural or wood fibers 3 have a length in the range between 3 and 30 mm and a diameter in the range between 10 .mu.m and 150 .mu.m.
  • the core 2 has a sheath 5 made of a fiber-reinforced plastic.
  • the envelope 5 has along the bar 1 a constant thickness U of about 0.8 mm.
  • the entire lath 1 has in the sectional plane of the Fig. 1 a thickness L of about 8 mm.
  • the core 2 has a length along the bar 1 by more than 10% varying density.
  • the core 2 is in the Fig. 1 divided from left to right into a total of six sections I, II, III, IV, V and VI.
  • the two middle sections along the bar 1 are the sections III and IV.
  • the two end sections are the sections I and VI.
  • Between the end and the middle sections are the sections II and V.
  • the sections II to V have an approximately equal longitudinal extent. In contrast, the end-side sections I and VI are slightly longer.
  • the core 2 has a density of 575 g / l. In the middle sections III and IV, the core 2 has a density of 810 g / l. In between, ie in sections II and V, the core 2 has a density of 690 g / l. The density of the core 2 thus varies in steps between sections I and II, II and III, IV and V, and V and VI, respectively.
  • the slat 1 is made as follows:
  • a stack of multiple layers of a acrylate resin impregnated natural or wood fiber prepreg is provided. Where there should be a higher density of the core 2 along the slat 1, there is also a higher number of prepreg layers in this provision.
  • Sections III and IV for example, there are three prepreg layers.
  • Sections II and V two prepreg layers are present.
  • Sections I and VI a prepreg sheet is present.
  • the stack thus provided is pressed to the core 2 of the support structure and in turn subsequently wrapped with the sheath 5.
  • the acrylate resin is pressed through gaps between the natural or wood fibers which are present in the unpressed state. In this way, the prepregs can be formed plastically.
  • the prepreg layers have a temperature of 250 ° C during pressing.
  • the pressing tool has a temperature of 70 ° C during pressing.
  • FIG Fig. 3 can also be a continuous density variation of the core 2, as shown in Fig. 3a shown.
  • the density varies from that in the Fig. 1 left end of the bar 1, starting from a value of about 300 g / l to a value in the middle of the bar 1 after Fig. 1 at 800 g / l and then takes up to in the Fig. 1 right end of the bar 1 again from a value of 300 g / l.
  • This variation is approximately cosinusoidal about a center along the batten 1.
  • a continuous density variation after Fig. 3a can also be generated by means of a prepreg stack, wherein the individual prepreg layers run towards the end of each wedge-shaped, so decrease in their strength linearly towards their ends.
  • a continuous density variation can be achieved by using a fiber mat as a core-making material, wherein the fiber mat has a continuously varying basis weight according to the desired density variation.
  • the ski 6 has a tip portion I, a binding portion III and an end portion V. Between the tip portion I and the binding portion III and between the binding portion III and the end portion V, there is a transition portion II and IV, respectively.
  • the ski has a varying cross section over its length.
  • both the thickness of the core 2 perpendicular to a contact plane of this and the width of the core 2 varies along the ski 6.
  • the thickness variation is such that the ski 6 is the thickest in the binding section III, the strength of the ski 6 to Shovel and towards the end continuously decreases.
  • the width of the ski 6 varies in such a way that it is waisted, ie it is the least wide in the binding section III.
  • Fig. 5 shows a preparatory prepared for the preparation of the ski 6 pile of natural or wood fiber prepregs 7, 8, 9, 10.
  • the prepregs 7 to 10 have an acrylate resin content of 13%.
  • the prepreg 7 represents the basis of the stack, which covers the entire length of the ski 6.
  • the prepregs 8, 9 are each made shorter and are used to design the transition sections of the ski 6.
  • the prepreg 10 is present only in the binding section III.
  • the starting thickness of the stacked prepregs 7 to 10 is such that, after the compression of the prepregs, they have been densified most in the region of the binding section III, so that the highest density of the core 2 is present there.
  • the course of the nuclear density is in the Fig. 6 shown the the Fig. 3 similar.
  • Transition sections II and IV have two density ranges with a lower density of about 650 g / L and a higher density of about 700 g / L.
  • Bonding Section III has a density of about 850 g / l.
  • a further variant of a support structure according to the invention is explained using the example of a hockey stick 11.
  • the hockey stick 11 is divided into a total of four sections, namely a trowel section I, a handle section IV and two transition sections II and III.
  • the cross-sectional shapes of the trowel section I and the grip section IV illustrate the two cross-sectional views of Fig. 9 or 8.
  • the prepreg preparation before pressing the core 2 of the hockey stick 11 is such that there are four prepreg layers in the trowel section I, one prepreg layer in the grip section IV and three or two prepreg layers in the transition sections II and III.
  • the trough portion I results in a density of the core 2 of 850 g / l (see. Fig. 10 ).
  • a core 2 density of 790 g / l results.
  • In the transitional section III results in a density of the core 2 of 690 g / l.
  • In the grip portion IV results in a density of the core 2 of 610 g / l.
  • FIGS. 11 and 12 Based on FIGS. 11 and 12 below, a developer 12 is explained as a further example of a support structure according to the invention. Components which correspond to those described above with reference to Fig. 1 to 10 have already been described, bear the same reference numbers and will not be discussed again in detail.
  • the developer 12 has an enclosure 13 with a length along the developer 12 varying strength. This thickness is twice as large in a middle section II of the developer 12 as in one in the Fig. 11 left-sided section I or in one in the Fig. 11 right-hand section III.
  • the envelope 13 is formed by a fiber-reinforced plastic laminate, which is designed in section II double-layered. A second layer 14 of the sheath 13 is inwardly in this double-layered section II, that is, offset to the core 2.
  • the prepregs, which form the core 2 all have the same length in the developer 12, which coincides with the length of the developer 12, and the same strength.
  • the second layer 14 works in the outer prepreg layers, so that the core 2 in Section II receives an increased density, without that in the area II compared to the areas I and III an increased number present at prepreg layers.
  • the core 2 has a constant basis weight.
  • the density of the core 2 of the developer 12 is about 900 g / l.
  • the density of the core 2 is about 600 g / l.
  • the developer 12 has outer walls 15, 16, which are smooth throughout, so without steps executed.
  • Fig. 13 shows in one too Fig. 12 Similar cross-sectional representation of the developer 12 in one of the FIGS. 11 and 12 alternative version.
  • the core 2 of the developer 12 after Fig. 13 has a along the developer 12, that is perpendicular to the plane to Fig. 13 Via a chamber wall 18, which limits the hollow chamber 17, the core 2 is exposed even after the application of the envelope 5 and is over at least one end of the developer 12 after Fig. 13 5 accessible after application of the enclosure.
  • a hollow structure having support structure 12 may be prepared such that a sheathing through the sheath 5 takes place simultaneously with a shaping of the core 2 by pressing.
  • the sheath 5 and the core 2 are then in the support structure produced at the same time.
  • Water or water vapor, which forms during the compression of the core 2 can then be discharged via the hollow chamber 17 to the outside of the support structure, so that a drying of the core 2 is possible.
  • drying can be assisted, for example, by passing dry air or another drying medium through the hollow chamber.
  • the hollow chamber 17 can be closed to the end, so that an undesirable absorption of water of the core 2 is prevented.
  • FIGS. 14 to 17 show further cross-sections of support structures or prepreg layers as an intermediate step of their preparation, these cross-sectional design can be used in the application example "ski" for the support structure.
  • a ski 19 after the FIGS. 14 and 15 has a core 2, which is made of several parts.
  • a central core portion 20 is in the binding portion of the ski 19 before and has a rectangular cross-section.
  • the lateral core sections extend in the longitudinal direction of the ski 19, that is perpendicular to the plane of the drawing FIGS. 14 and 15 not only beyond the binding section, but also beyond it on both sides of the binding section. This is due to the further cross-sectional view of the ski 19 after Fig. 15 clarifies that shows a cross section outside the binding section.
  • the ski 19 between the two lateral core portions 21 is designed as a plate portion 22, which may for example be made entirely of the material of the enclosure 5.
  • Fig. 16 shows stacked prepreg layers 23, 24, 25, 26, 27, 28, 29 in a schematic instantaneous representation of an intermediate step in the production of a further embodiment of a ski as an example of a support structure.
  • the prepreg layers 23 to 29 are in the Fig. 16 numbered from left to right. In the Fig. 16 to the right is the width dimension b of the ski to be produced. In the Fig. 16 upwards the height dimension h of the ski to be produced, ie its thickness perpendicular to the support plane.
  • the prepreg sheets 23 to 29 are all made of the same material as explained above in connection with the prepregs 7 to 10, for example.
  • the prepreg layers 23 to 29 all have the same density.
  • the prepreg layers 23 to 29 are arranged to prepare for compression in the Fig. 16 down flush all to a plane 30 that coincides with the support plane of the ski to be made.
  • the prepreg layers 23, 25, 27 and 29 have a greater height extent compared to the prepreg layers 24, 26, 28 respectively disposed between two of these prepregs.
  • stacked prepreg layers 23 to 29 is present in a cross-sectionally generally rectangular core 2 as an intermediate product of the ski to be produced.
  • the prepreg layers 23, 25, 27, 29 with in the initial state of greater height are more compressed than the other prepreg layers 24, 26, 28. After pressing therefore results in a graded density variation across the width b of the core 2, in of the Fig. 17 at the top of a p (b) diagram.
  • At the place of higher prepreg layers 23, 25, 27, 29 is in each case a higher density than between them.
  • the core 2 is then provided with an envelope, as already explained above in connection with the other embodiments.
  • FIGS. 16 and 17 manufactured core properties that are comparable to those of a conventionally produced ski with uniform core density, were milled on the top of longitudinal grooves. A corresponding milling waste can therefore in the execution of the FIGS. 16 and 17 be avoided.

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  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
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  • Reinforced Plastic Materials (AREA)

Claims (15)

  1. Structure porteuse (1 ; 6 ; 11 ; 12 ; 19)
    - comprenant une partie centrale (2) contenant des fibres naturelles, respectivement des fibres de bois (3) qui sont reliées entre elles par une résine acrylate,
    - comprenant une enveloppe (5) à base d'une matière synthétique renforcée de fibres,
    caractérisée en ce que la partie centrale (2) présente une densité variant de plus de 10 % le long de la structure porteuse (1 ; 6 ; 11 ; 12).
  2. Structure porteuse selon la revendication 1 caractérisée en ce que la partie centrale présente une proportion de résine acrylate (4) dans un intervalle entre 8 % en poids et 25 % en poids.
  3. Structure porteuse selon les revendications 1 ou 2 caractérisée par une variation de densité continue de la partie centrale (2).
  4. Structure porteuse selon les revendications 1 ou 2 caractérisée par une variation de densité de la partie centrale (2) décroissant par paliers.
  5. Structure porteuse selon l'une des revendications de 1 à 4 caractérisée en ce que la densité de la partie centrale (2) varie dans l'intervalle entre 300 g/l et 1100 g/l.
  6. Structure porteuse selon l'une des revendications de 1 à 5 caractérisée par une section variant dans la direction longitudinale.
  7. Structure porteuse selon l'une des revendications de 1 à 6 caractérisée en ce que les fibres naturelles, respectivement les fibres de bois (3), présentent une longueur dans un intervalle entre 3 mm et 60 mm.
  8. Structure porteuse selon l'une des revendications de 1 à 7 caractérisée en ce que l'enveloppe (5) présente une épaisseur (U) qui est inférieure à 1 mm.
  9. Structure porteuse selon l'une des revendications de 1 à 8 caractérisée par une enveloppe (5) avec une épaisseur variant le long de la structure porteuse (1 ; 6 ; 11 ; 12).
  10. Structure porteuse selon la revendication 9 caractérisée par une enveloppe en plusieurs couches (13, 14).
  11. Structure porteuse selon les revendications 9 et 10 caractérisée en ce que le long des domaines d'épaisseur variable de cette enveloppe (13, 14), la section extérieure de la structure porteuse (12) est constante.
  12. Structure porteuse selon l'une des revendications de 1 à 11 caractérisée en ce que le plan (15a) contenu dans la partie centrale (2) dans l'un des axes longitudinaux de la structure porteuse (12) présente une masse surfacique constante.
  13. Procédé de fabrication d'une structure porteuse (1 ; 6 ; 11 ; 12 ; 19) selon l'une des revendications de 1 à 12 comprenant les étapes suivantes :
    - préparation d'un empilement de plusieurs couches d'un prépreg (7 à 10) de fibres naturelles/fibres de bois imprégnées de résine acrylate (4), où il y a un nombre de couches de prépreg plus important dans les zones, le long de la structure porteuse (1 ; 6 ; 11 ; 12) dans lesquelles la densité de la partie centrale (2) doit être plus élevée,
    - pressage de l'empilement de prépreg contre la partie centrale (2) de la structure porteuse (1 ; 6 ; 11 ; 12),
    - enveloppement de la partie centrale (2) avec l'enveloppe (5).
  14. Procédé de fabrication d'une structure porteuse (1 ; 6 ; 11 ; 12 ; 19) selon l'une des revendications de 1 à 12 comprenant les étapes suivantes :
    - préparation d'un matelas de fibres comprenant la variation de masse surfacique correspondant à la variation de densité souhaitée de la partie centrale dans la direction longitudinale de la structure porteuse à fabriquer,
    - pressage du matelas de fibres contre la partie centrale (2) de la structure porteuse,
    - enveloppement de la partie centrale (2) avec l'enveloppe (5).
  15. Utilisation d'une structure porteuse selon l'une des revendications de 1 à 12 en tant que
    - latte (1) pour un sommier à lattes d'un cadre de lit,
    - ski (6; 19),
    - crosse de hockey (11),
    - canot,
    - élément porteur (12)
EP09712815A 2008-02-23 2009-02-16 Structure porteuse, procédé de fabrication et utilisation d une telle structure porteuse Not-in-force EP2247222B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200930245T SI2247222T1 (sl) 2008-02-23 2009-02-16 Nosilna struktura in pa postopek za izdelavo in uporabo take nosilne strukture

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008010869A DE102008010869A1 (de) 2008-02-23 2008-02-23 Tragstruktur sowie Verfahren zur Herstellung und Verwendung einer derartigen Tragstruktur
PCT/EP2009/001077 WO2009103474A1 (fr) 2008-02-23 2009-02-16 Structure porteuse, procédé de fabrication et utilisation d’une telle structure porteuse

Publications (2)

Publication Number Publication Date
EP2247222A1 EP2247222A1 (fr) 2010-11-10
EP2247222B1 true EP2247222B1 (fr) 2012-02-08

Family

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Application Number Title Priority Date Filing Date
EP09712815A Not-in-force EP2247222B1 (fr) 2008-02-23 2009-02-16 Structure porteuse, procédé de fabrication et utilisation d une telle structure porteuse

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EP (1) EP2247222B1 (fr)
AT (1) ATE544376T1 (fr)
DE (1) DE102008010869A1 (fr)
SI (1) SI2247222T1 (fr)
WO (1) WO2009103474A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011076873A1 (de) 2011-06-01 2012-12-06 Thermoplast Composite Gmbh Tragstruktur sowie Bauelement mit einer derartigen Tragstruktur
DE112012003520T5 (de) * 2011-08-25 2014-05-08 Bcomp Ag Ein Verfahren zum Herstellen eines Verbundmaterials, und ein Brett hergestellt aus diesem Verbundmaterial
DE102011088149A1 (de) * 2011-12-09 2013-06-13 Evonik Industries Ag Beschichteter Verbundkörper, umfassend ein Verbundmaterial
DE102012208017A1 (de) 2012-05-14 2013-11-14 Thermoplast Composite Gmbh Plattenförmige Tragstruktur
FR2999944B1 (fr) * 2012-12-20 2015-02-13 Salomon Sas Chant lateral pour planche de glisse
WO2016019644A1 (fr) * 2014-08-07 2016-02-11 厦门奥力龙科技有限公司 Planche de course pour machine de course, et machine de course l'utilisant
WO2021099836A1 (fr) * 2019-11-19 2021-05-27 Pda Ecolab Barre pour activités sportives et son procédé de formation

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1119503B (de) 1956-08-22 1961-12-14 Johann Dombrovskis Verfahren zur Herstellung von mit giessbarem Kunststoff umhuellten Gegenstaenden
JPS4837751B1 (fr) * 1969-05-14 1973-11-13
DE3440906A1 (de) 1984-11-09 1986-05-22 Schock & Co Gmbh, 7060 Schorndorf Profilleiste zur herstellung von fensterrahmen
US5087511A (en) * 1990-08-31 1992-02-11 General Electric Company Composite element having a variable density core
DE29816638U1 (de) 1998-09-16 1999-05-20 FIAP Fischtechnik GmbH, 92289 Ursensollen Transportbehälter aus GFK mit Holzkern
DE10060379B4 (de) * 2000-12-05 2004-10-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung von multidirektionalen Faden- oder Fasergelegen
US20060131437A1 (en) * 2004-12-21 2006-06-22 General Electric Company Load bearing structure and method of manufacture thereof
DE102006023865B4 (de) * 2006-05-19 2012-02-16 Eads Deutschland Gmbh Verfahren zur Herstellung eines faserverstärkten Bauteils

Also Published As

Publication number Publication date
SI2247222T1 (sl) 2012-06-29
EP2247222A1 (fr) 2010-11-10
ATE544376T1 (de) 2012-02-15
WO2009103474A1 (fr) 2009-08-27
DE102008010869A1 (de) 2009-09-10

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