EP3568270B1 - Veneer part and method for producing same - Google Patents
Veneer part and method for producing same Download PDFInfo
- Publication number
- EP3568270B1 EP3568270B1 EP17822132.1A EP17822132A EP3568270B1 EP 3568270 B1 EP3568270 B1 EP 3568270B1 EP 17822132 A EP17822132 A EP 17822132A EP 3568270 B1 EP3568270 B1 EP 3568270B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- veneer
- strip
- wood
- band
- adhesion promoter
- 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.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000002023 wood Substances 0.000 claims description 83
- 239000002318 adhesion promoter Substances 0.000 claims description 38
- 239000004753 textile Substances 0.000 claims description 30
- 229920000642 polymer Polymers 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 21
- 229920002522 Wood fibre Polymers 0.000 claims description 20
- 239000002025 wood fiber Substances 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 19
- 229920001169 thermoplastic Polymers 0.000 claims description 16
- 238000005452 bending Methods 0.000 claims description 13
- 239000004416 thermosoftening plastic Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000004831 Hot glue Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000010985 leather Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 2
- 238000007906 compression Methods 0.000 claims 2
- 239000004744 fabric Substances 0.000 description 32
- 239000000123 paper Substances 0.000 description 20
- 238000003825 pressing Methods 0.000 description 10
- 239000000835 fiber Substances 0.000 description 7
- 238000004026 adhesive bonding Methods 0.000 description 4
- 238000007731 hot pressing Methods 0.000 description 4
- 238000009954 braiding Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000011093 chipboard Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 239000012783 reinforcing fiber Substances 0.000 description 1
- 239000012173 sealing wax Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/005—Tenderising, e.g. by incising, crushing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
Definitions
- the invention relates to a method according to the preamble of patent claim 1 for the production of a veneer part and a veneer part produced in particular by means of such a method according to the preamble of patent claim 9.
- Such a method and such a veneer part are disclosed, for example, in AT 167 665 B out.
- Veneered parts which are formed entirely or at least partially from veneer wood, are known in a variety of configurations and are suitable for various purposes. Veneer parts are primarily used as a decorative layer on the visible side, e.g. for floor coverings such as parquet, for wall and ceiling coverings, furniture, musical instruments, housings of all kinds or in particular for vehicle interior trim parts and equipment such as dashboards, center consoles, door trim parts, armrests, steering wheels and the like .
- the veneer part can be prefabricated, cut to size and connected to a corresponding carrier, eg glued, in a relatively simple manner in the case of essentially flat objects
- a corresponding carrier eg glued
- thermosetting resins thermosetting resins and the resins are cured to form a thermoplastic or thermoset polymer.
- the molded part produced in this way then has the decorative veneer part on the visible side, which is firmly connected to the polymer carrier.
- the molded part provided with the veneer part an individually desired geometry, with only the visible side having to be provided with the veneer part in order to ensure the desired wood-like look and feel , while non-visible areas, including the support that is decisive for the strength of the molded part, can be produced from polymer materials that are inexpensive and can be processed using conventional plastics processing methods.
- wood veneers can, of course, also be applied to non-polymeric carriers, such as wood fiber materials, plasterboard materials and the like, which can be done by gluing or any other known types of connection or coating.
- the DE 10 2004 062 646 B4 describes an interior trim part for motor vehicles and a method for its production, the interior trim part having a visible surface made of a wood veneer, which is provided on its inside with a fleece, via which it is applied to a plastic carrier layer.
- the wood veneer is first provided with the fleece on its non-visible side, for example by gluing, after which it is back-injected with the carrier polymer in an injection mold.
- the WO 00/27926 A1 describes a molded part which has a carrier made of thermoplastic or thermoelastic polymers and a decorative layer connected to the carrier, which can be configured, inter alia, in the form of wood veneers.
- the decorative layer is pressed at elevated pressure and at elevated temperature, for example by means of a hot press, into the at least superficially plasticized polymer of the carrier, it being possible for a fiber layer to be arranged between the polymeric carrier and the decorative layer in order to prevent the plasticized polymer from penetrating to prevent the visible side of the open-pored decorative layer, but nevertheless to ensure a permanent melt connection between the polymeric carrier and the decorative layer.
- the DE 1 896 722 U a self-supporting braided veneer produced from several veneer strips, which can be glued to a carrier material such as solid wood, chipboard, etc., in order to be used as a finished braided veneer panel not only in furniture, but also for doors or interior fittings.
- the invention is therefore based on the object of proposing a method for producing a new type of veneer part of the type mentioned at the outset, which has an aesthetically perceived structure but nevertheless high flexural strength, so that it can also be used for objects or molded parts with relatively complex surface geometries . It is also directed to such a veneer part and to a molded part provided with such a veneer part.
- the invention also provides a veneer part according to claim 9, produced in particular by means of such a method, with a mesh or fabric made of at least two essentially strip-shaped bands, which are pressed together to form an essentially flat surface, with at least one of the strip-shaped bands is formed from plywood.
- One exemplary embodiment provides a molded part with a veneer part of the aforementioned type, the veneer part being connected to a dimensionally stable carrier, in particular made of at least one polymer.
- the veneer part according to the invention or the molded part provided with such a veneer part is able to give the viewer a new aesthetic impression due to the two or in particular several intertwined or woven, essentially strip-shaped bands of the veneer part, which is not only due to the type and possibly the grain the type of wood used, but also in particular by the arrangement of the strip-shaped bands in the tissue or braid is decisively determined. Due to the pressing of the fabric or mesh produced, which, as explained in more detail below, can be carried out in particular as hot pressing at elevated temperature, the veneer part nevertheless has a largely flat surface, so that it has an optically aesthetic visible surface as well as a conventional veneer part has the appropriate feel and no larger grooves or grooves in which dirt can accumulate.
- the veneer part can also have a surprisingly high Give flexural strength, so that it can also be applied to molded parts with very complex surface geometries, such as their edges, projections, grooves, undercuts or the like, without the veneer part being damaged or even breaking.
- the invention is based on the basic idea that primarily the wood fibers of the strip-shaped bands or the veneer wood blank from which the strip-shaped bands are cut, and in particular the wood fibers arranged primarily in the direction of extension of the bands, limit the bending strength of the mesh or fabric affect.
- the breaking up of the wood fibers, in particular at least those with a direction of extension component running in the direction of extension of the essentially strip-shaped band, consequently leads to high resilience and consequently to very high flexural strength of the strip-shaped bands, so that the finished braided or woven, pressed veneer part can be formed non-destructively into geometries with very small bending radii and also remains permanently in the desired shape.
- the arrangement of the strip-shaped bands in a mesh or fabric increases the tensile and flexural strength of the veneer part, so that it is mechanically more resilient than conventional veneers and consequently, as explained in more detail below, can be made with a very small thickness.
- a molded part provided with such a veneer part can consequently be used wherever conventional veneer parts have been used so far, such as for floor coverings, such as parquet, for wall and ceiling coverings, furniture, musical instruments, housings of any kind or in particular for vehicle interior trim parts and - equipment such as dashboards, center consoles, door trim parts, armrests, steering wheels and the like.
- the expediently dimensionally stable carrier of the molded part can in particular be one based on polymers, which can optionally be fiber-reinforced to improve their mechanical material properties, with the veneer part being prefabricated and then arranged in a mold in a manner known per se and fitted with a thermoplastic and/or thermoelastic polymer can be back-injected or hot-pressed.
- thermoplastic and/or thermoelastic polymer instead of a plasticizable thermoplastic and/or thermoelastic polymer, reactive resins are used, which can also optionally be mixed with reinforcing fibers and become a likewise thermoplastic or thermoelastic or duroplastic one Polymer are cured.
- the carrier does not necessarily have to be a polymer-based one, but the veneer part according to the invention can of course also be attached to other types of carrier by means of any known connection methods, such as gluing, coating, (hot) pressing and the like. such as on the basis of wood fiber materials, e.g.
- the very high flexural strength of the veneer part in turn opens up the possibility of using it on complex or with more or less sharp edges, grooves, projections, Apply undercuts, etc. provided carrier, with purely exemplary furnishings, such as pieces of furniture, are mentioned.
- fabric refers to an essentially right-angled arrangement of the essentially strip-shaped bands in the manner of weft and warp threads of a fabric.
- braid refers to a corresponding arrangement of the essentially strip-shaped bands, which, however, do not necessarily have to be arranged approximately perpendicularly, but can also be arranged at practically any angle to one another.
- the at least one strip-shaped band formed from veneer wood or its veneer wood blank is provided on one side with an adhesion promoter layer, in particular before its wood fibers are broken up.
- the adhesion promoter layer increases the mechanical stability, in particular the (flexural) strength, of the strip-shaped strip made of veneer wood or its veneer wood blank - be it on the occasion of the breaking up of its fibers, so that the risk of damage when the fibers break open, or be it in the finished veneer part - on the other hand the adhesion promoter layer serves to produce a reliable and permanent connection between the strip-shaped bands forming the mesh or fabric when they form a substantially flat surface are pressed together, such as in particular by means of hot pressing.
- strip-shaped strips made of veneer wood strip-shaped strips made of other materials are also used to produce the fabric or mesh, as is explained in more detail below, it can of course also be advisable for the latter purpose to use all strip-shaped strips with such an adhesion promoter layer to provide.
- At least one component of the adhesion promoter layer can preferably be selected from the group consisting of thermoplastic and/or thermoelastic polymers, resins that can be cured and optionally crosslinked, for example to form thermoplastic and/or thermoelastic polymers or also to form thermoset polymers, hot-melt adhesives and glues be, wherein the adhesion promoter layer is immobilized on a textile and / or paper layer.
- the thermoplastic and/or thermoelastic polymer of the adhesion promoter layer can consequently be heated to a temperature in the range of its melting temperature during the pressing of the mesh or fabric formed from the essentially strip-shaped strips, so that it connects the strip-shaped strips to one another in the manner of a fusion bond and a durable veneer part is produced.
- an elevated temperature in the range of the curing or crosslinking temperature of the resins can be set in order to ensure a permanent connection of the strip-shaped ribbons forming the braiding or fabric.
- the use of hot-melt adhesives or glues is also conceivable for the permanent connection of the essentially strip-shaped bands, which develop their effect during the pressing at elevated temperature - or in the case of glues also at ambient temperature.
- the adhesion promoter layer is attached to a textile and/or paper layer, such as a preferably very thin fleece, mesh, woven fabric, knitted fabric, crocheted fabric, scrim or the like based on textile fibers including natural fibers or an equally preferably very thin layer based on paper materials, immobilized, the adhesion promoter layer being applied to the textile or paper layer or the latter being impregnated or soaked in particular with the adhesion promoter.
- a textile and/or paper layer such as a preferably very thin fleece, mesh, woven fabric, knitted fabric, crocheted fabric, scrim or the like based on textile fibers including natural fibers or an equally preferably very thin layer based on paper materials, immobilized, the adhesion promoter layer being applied to the textile or paper layer or the latter being impregnated or soaked in particular with the adhesion promoter.
- the textile and/or paper layer is able to ensure even greater flexural and tear strength of the essentially strip-shaped strips or their veneer wood blanks, be it when the wood fibers are broken up, be it when the strip-shaped strips are arranged to form the mesh or fabric or be it during the (hot) pressing of the mesh or fabric from the strip-shaped bands or during the production of a molded part with a veneer part according to the invention, if the latter has to be deformed according to the desired surface contour of the molded part.
- the wood fibers of the strip-shaped bands made of veneer wood or their veneer wood blanks can be be broken up, for example, in an advantageous embodiment, in that the strip-shaped strip formed from veneer wood or the veneer wood blank is moved through the gap between a first roller and a second roller, the first and second rollers corresponding in particular to the movement speed of the strip-shaped strip formed from veneer wood or its Veneer wood blank, are rotated in opposite directions.
- the most gentle possible breaking up of the wood fibers is ensured without otherwise destroying the wood material or to even break the strip-shaped band or its veneered wood blank.
- the first roller is an essentially rigid roller, e.g. made of metal, steel or the like
- the second roller is a roller that is flexible at least on the circumferential side, e.g. made of rubber, silicone or the like, such as an im Substantially entirely formed from a resiliently elastic material roller or a substantially rigid, but peripherally coated with such a material roller, can be selected, wherein the strip-shaped strip formed from veneer wood or its veneer wood blank, in particular during its movement through the gap between the first roller and the second roller is deflected at least in sections with a movement direction component extending in the radial direction of the rollers.
- the latter can be ensured in particular by making the space between the rollers smaller than the total thickness of the veneer wood blank or the strip-shaped band cut from this is selected, so that this or this, being deflected along the surface of the rigid roller, partially penetrates into the surface of the elastically flexible roller.
- the strip-shaped band or its raw veneer wood By guiding the strip-shaped band or its raw veneer wood in this way with a certain deflection of the same in the radial direction of the rollers, i.e. along a curved path, and the flexible elastic design of one of the rollers, the wood fibers are broken up particularly effectively, but at the same time gently, in order to give the raw veneer wood or to give the strip-shaped tape cut from it a very high flexural strength.
- the intended visible side of the strip-shaped band or its veneer wood blank ie the side opposite a preferably intended adhesion promoter and/or textile or paper layer, is guided along the flexible elastic roller in order to reliably avoid any impairment of the visible surface.
- the strip-shaped bands formed from veneer or the veneer wood blank in particular after the breaking up of their wood fibers and/or after the application of the adhesion promoter layer, preferably including the textile and/or paper layer impregnated with it, is sanded at least on its visible side if, for example, such a thin veneer wood blank or such thin strip-shaped strips cut from it are to be used to produce the mesh or fabric, which could be damaged when their fibers break open.
- the grinding process consequently makes it possible to achieve extremely small overall thicknesses and also to design a very smooth, aesthetically pleasing surface of the veneer part.
- the finished veneer part can also be sanded on the visible side.
- the mesh or fabric is provided with an adhesion promoter layer on its side opposite the visible side during pressing or after pressing, which is immobilized in particular on a textile and/or paper layer in order to ensure simple further processing to provide the veneer part, on the occasion of which the veneer part in particular on a - polymeric or other type - carrier is applied to form a dimensionally stable molded part.
- an adhesion promoter layer on its side opposite the visible side during pressing or after pressing, which is immobilized in particular on a textile and/or paper layer in order to ensure simple further processing to provide the veneer part, on the occasion of which the veneer part in particular on a - polymeric or other type - carrier is applied to form a dimensionally stable molded part.
- a carrier made of polymer materials is applied to the veneer part by means of thermoplastic processing methods, such as injection molding, hot pressing or the like
- the textile or paper layer is also able to prevent the polymer melt from penetrating to the visible side of the veneer part, as is largely evident from the quoted
- An advantageous embodiment of a veneer part according to the invention is therefore characterized in that the mesh or fabric made of the at least two strip-shaped bands is provided on one side with an adhesion promoter layer, preferably one of the type mentioned above, which is attached in particular to a textile and/or Paper layer is immobilized to the mechanical To increase stability and strength of the veneer part and to improve its further processing.
- an adhesion promoter layer preferably one of the aforementioned type, can therefore preferably be arranged between the veneer part and the carrier, which can have in particular at least one textile component and/or a component based on paper materials, which is able to protect against the penetration of a polymer melt or a liquid resin of the carrier during back-injection molding or pressing of the veneer part and can be designed, for example, as a nonwoven, braided, woven, knitted, crocheted, scrim or the like.
- At least one of the adhesion promoters used should advantageously be the same polymer as that of the carrier or a polymer compatible therewith, which, for example, is also at least partially melted and on the one hand connects to the polymer of the carrier, on the other hand penetrates the surface of the open-pored veneer part on the side opposite the visible side.
- all strip-shaped bands of the fabric or mesh of the veneer part according to the invention can be cut from at least one veneer wood blank, so that the veneer part is formed essentially entirely of wood.
- the method according to the invention makes it possible, in particular, to impart a very high flexural strength to the veneer part formed from the interlaced or woven, essentially strip-shaped bands, in order to be able to apply it to carriers with complex surface geometries and in this way a corresponding , to produce decorative molding.
- the veneer part has a flexural strength which enables non-destructive bending of the veneer part through an angle of 90° with a bending radius of less than 10 mm. This enables the veneer part to be deformed into complex geometries with very small bending radii, such as are required, for example, in order to cover edges or indentations of a carrier of the molded part with the veneer part.
- the veneer part can have a flexural strength which allows the veneer part to be bent through an angle of 90° with a bending radius of at most approximately 7.5 mm, in particular at most approximately 5 mm, preferably at most approximately 3 mm or even approximately 2.5mm, allows.
- the method according to the invention also makes it possible to reduce the total thickness of the individual, essentially strip-shaped parts forming the veneer part Bands and consequently the total thickness of the veneer part itself to be chosen very small, which is associated with a material and consequently with a cost saving and also ensures in particular a very good workability due to very small selectable bending radii of the veneer part.
- the total thickness of the veneer part is at most 1.5 mm, although smaller thicknesses are also possible, such as at most approximately 1.2 mm, in particular at most approximately 1.0 mm or preferably at most approximately 0.8 mm.
- At least the at least one strip-shaped band made of veneer wood has a thickness of at most 0.75 mm, although even smaller thicknesses are possible, such as at most about 0.6 mm, in particular at most about 0.5 mm or preferably at most about 0 .4mm.
- the veneer part comprises a plurality of essentially strip-shaped bands 1a, 1b, which are formed from veneer wood and have been cut from a corresponding veneer wood blank.
- the bands 1a, 1b it is also conceivable to design one or more of the bands 1a, 1b from other materials, such as metal, leather or the like (not shown in the drawing).
- the strip-shaped bands 1a, 1b are arranged in the manner of a fabric, with the bands 1a forming the “warp threads”, for example, while the bands 1b arranged at an angle of about 90° form the “weft threads”.
- the bands 1a, 1b can of course also be arranged in the manner of a braid at an angle other than 90° to one another (not shown in the drawing).
- the strip-shaped bands 1a, 1b are also pressed together in such a way that they form a substantially flat surface 2, at least on the intended visible side of the veneer part, which can of course be coated in a conventional manner with a transparent top layer, such as a sealing wax or the like (not shown).
- the veneer part is provided with an adhesion promoter layer 3, which can, for example, comprise one or more thermoplastic polymers and is immobilized on a textile or paper layer, which can be impregnated with the adhesion promoter, for example, so that the production of a molded part with a decorative layer from the Veneer part is possible in a simple manner in that the veneer part is placed in a mold and back-injected or hot-pressed on its side facing the adhesion promoter- 3 or the textile or paper layer with a thermoplastic polymer.
- the molded part obtained in this way consequently has a carrier made of the solidified thermoplastic polymer, which is permanently and reliably connected to the veneer part (not shown) by means of fusion bonding with the textile or paper layer being arranged in between.
- the veneer part has a very high flexural strength, wherein it has been bent in the present case, for example, with a radius R of about 0.3 mm at an angle ⁇ of about 90 °, as is desirable, for example, when the veneer part is intended to overlap a visible edge of a carrier of a molded part to be provided with this.
- the veneer part can in particular have a very small overall thickness of, for example, approximately 0.6 mm.
- the strip-shaped bands 1a, 1b have a very small thickness of, for example, about 0.3 mm can, on their side opposite the visible surface 2, in turn be provided with an adhesion promoter layer 4, which in turn may be immobilized on a textile or paper layer and may be selected, for example, from the group of thermoplastic or thermoelastic polymers, curable resins, hot-melt adhesives and glues can.
- a suitable veneer wood blank (not shown) with a thickness corresponding approximately to the desired thickness of the strip-shaped bands 1a, 1b of the veneer part is provided and preferably on one side with the adhesion promoter layer 4 or with the textile impregnated with the adhesion promoter or provided with a paper layer.
- the wood fibers of the veneer wood blank are then broken up, for example by being guided through the gap of a roller arrangement.
- An exemplary embodiment of such a roller arrangement is that 4 refer to. It comprises, on the one hand, a first roller 10 made of a rigid material, e Rubber, silicone or the like is made.
- the second roller 11 has a rotatably mounted core 12 made of a rigid material, eg metal, and a full-circumferential coating 13 made of the elastically flexible material.
- the motorized drive of the rigid first roller 10 can, for example, comprise a drive roller 14 which is frictionally connected thereto on the surface.
- the second roller 11, which is designed to be elastically resilient on the peripheral side can be rotationally driven passively or likewise by a motor and synchronized in terms of its peripheral speed with that of the first roller 10 (not shown).
- the gap between the first roller 10 and the second roller 11 is preferably chosen such that it is smaller than the thickness of the veneer wood blank, whereby depending on the surface elasticity of the roller 11 it can in particular also be almost zero. Furthermore, the diameter of the rigid first roller is expediently appreciably smaller than the diameter of the resilient roller 11.
- the veneered wood blank is fed through the gap between the rollers 10, 11 at a suitable feed rate v, it will be wrapped around a peripheral portion of the rigid second roller 10 with a small diameter is deflected with a direction of movement component extending in the radial direction of the rollers 10, 11, with surface penetration into the elastically yielding second roller 11 with a large diameter, so that in particular those wood fibers with a direction of extension component running in the direction of movement v of the veneer wood blank are broken up, which gives them a very capable of imparting high flexural strength.
- the veneer wood blank can optionally be sanded on its side opposite the adhesion promoter layer 4, after which it is cut to form the strip-shaped bands 1a, 1b. Care should be taken here that the cutting lines run essentially parallel to the direction of movement v, with which the veneered wood blank passes through the roller arrangement (cf 4 ) has been moved in order, in particular in the direction of extension of the strip-shaped bands 1a, 1b, to have a very high flexibility of the same with a very high flexural strength ensure.
- the essentially strip-shaped strips 1a, 1b cut from the veneer wood blank are arranged to form the desired mesh or fabric (cf. in particular the 1 ).
- the mesh or fabric of the strip-shaped bands 1a, 1b can then be hot-pressed to obtain the largely flat surface 2, with the adhesion promoter layer 4 ensuring that the strip-shaped bands 1a, 1b are permanently fixed to one another.
- the veneer part obtained in this way can be provided on its side opposite the visible surface 2 with the adhesion promoter layer 3, which is in turn immobilized on a textile or paper layer, which is expediently carried out together with the hot pressing of the mesh or fabric produced from the strip-shaped bands 1a, 1b can, in that the textile or paper layer impregnated with the adhesion promoter layer 3 is inserted into the hot press on the side opposite the visible side of the mesh or fabric.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Laminated Bodies (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1, zur Herstellung eines Furnierteils und ein insbesondere mittels eines solchen Verfahrens hergestelltes Furnierteil gemäß dem Oberbegriff des Patentanspruchs 9. Ein derartiges Verfahren und ein derartiges Furnierteil gehen beispielsweise aus der
Furnierteile, welche gänzlich oder zumindest teilweise aus Furnierholz gebildet sind, sind in vielfältiger Ausgestaltung bekannt und für verschiedenartige Verwendungszwecke geeignet. So bieten sich Furnierteile vornehmlich als sichtseitige Dekorschicht z.B. für Fußbodenbeläge, wie Parkett, für Wand- und Deckenverkleidungen, Möbel, Musikinstrumente, Gehäuse jeglicher Art oder insbesondere auch für Fahrzeuginnenverkleidungsteile und -ausstattungen, wie Armaturenbretter, Mittelkonsolen, Türverkleidungsteile, Armauflagen, Lenkräder und dergleichen an.Veneered parts, which are formed entirely or at least partially from veneer wood, are known in a variety of configurations and are suitable for various purposes. Veneer parts are primarily used as a decorative layer on the visible side, e.g. for floor coverings such as parquet, for wall and ceiling coverings, furniture, musical instruments, housings of all kinds or in particular for vehicle interior trim parts and equipment such as dashboards, center consoles, door trim parts, armrests, steering wheels and the like .
Während bei im Wesentlichen flächigen Gegenständen das Furnierteil in relativ einfacher Weise vorgefertigt, zugeschnitten und mit einem entsprechenden Träger verbunden, z.B. verleimt, werden kann, ist es zur Herstellung von Formteilen mit demgegenüber komplexerer Oberflächengeometrie bekannt, ein vorgefertigtes Holzfurnier in ein Formwerkzeug einzulegen, wonach es entweder mit einem thermoplastischen und/oder thermoelastischen Polymer hinterspritzt oder heißverpresst wird, oder es wird mit aushärtbaren Harzen hinterspritzt und werden die Harze zu einem thermoplastischen oder duroplastischen Polymer ausgehärtet. Das solchermaßen erzeugte Formteil weist dann sichtseitig das dekorative Furnierteil auf, welches mit dem PolymerTräger fest verbunden ist. Von Vorteil ist neben der Gewährleistung einer relativ einfachen und kostengünstigen Serienfertigung insbesondere die Möglichkeit, dem mit dem Furnierteil versehenen Formteil eine individuell gewünschte Geometrie zu verleihen, wobei lediglich die Sichtseite mit dem Furnierteil versehen werden muss, um für die gewünschte holzartige Optik und Haptik zu sorgen, während nicht sichtbare Bereiche einschließlich des für die Festigkeit des Formteils maßgeblichen Träger aus demgegenüber preisgünstigen und mittels herkömmlicher Kunststoffverarbeitungsverfahren verarbeitbaren Polymermaterialien erzeugt werden können. Darüber hinaus können Holzfurniere selbstverständlich auch auf nicht polymere Träger, wie beispielsweise aus Holzfaser-, Gipskartonwerkstoffen und dergleichen, aufgebracht werden, was durch Kleben oder beliebige andere bekannte Verbindungs- bzw. Beschichtungsarten geschehen kann.While the veneer part can be prefabricated, cut to size and connected to a corresponding carrier, eg glued, in a relatively simple manner in the case of essentially flat objects, it is known for the production of molded parts with a more complex surface geometry in contrast to a prefabricated wood veneer in a mold inserted, after which it is either back-injected or hot-pressed with a thermoplastic and/or thermoelastic polymer, or it is back-injected with thermosetting resins and the resins are cured to form a thermoplastic or thermoset polymer. The molded part produced in this way then has the decorative veneer part on the visible side, which is firmly connected to the polymer carrier. In addition to ensuring relatively simple and inexpensive series production, it is particularly advantageous to be able to give the molded part provided with the veneer part an individually desired geometry, with only the visible side having to be provided with the veneer part in order to ensure the desired wood-like look and feel , while non-visible areas, including the support that is decisive for the strength of the molded part, can be produced from polymer materials that are inexpensive and can be processed using conventional plastics processing methods. In addition, wood veneers can, of course, also be applied to non-polymeric carriers, such as wood fiber materials, plasterboard materials and the like, which can be done by gluing or any other known types of connection or coating.
Die
Die
Darüber hinaus ist es bekannt, Furnierstreifen lose miteinander zu verflechten, um hieraus dreidimensionale Gebilde, wie insbesondere Möbel, herzustellen. So beschreibt beispielsweise die
Um gattungsgemäße Furnierteile auch für Formteile oder beliebige andere, aus solchen gebildete Gegenstände mit relativ komplexer Oberflächengeometrie einsetzen zu können, sollten sie eine hohe Biegefestigkeit aufweisen, so dass es beispielsweise möglich ist, sichtseitige Kanten des Formteils mit dem Furnierteil zu umschließen, ohne einen als unästhetisch empfundenen Stoß zwischen zwei verschiedenen Furnierteilen vorsehen zu müssen. Entsprechendes gilt für beliebige andere Vorsprünge oder Hinterschneidungen des mit dem Furnierteil zu versehenden Gegenstandes bzw. Formteils. Darüber hinaus ist es oftmals gewünscht, dem mit dem Furnierteil zu versehenden Gegenstand bzw. Formteil einen exklusiven Gesamteindruck zu verleihen, um neben der holzartigen Optik und Haptik für eine zusätzliche, als ästhetisch ansprechend empfundenen Wirkung zu sorgen.In order to also be able to use generic veneer parts for molded parts or any other objects formed from them with a relatively complex surface geometry, they should have a high flexural strength, so that it is possible, for example, to enclose visible edges of the molded part with the veneer part without one being considered unaesthetic having to provide the perceived impact between two different veneer parts. The same applies to any other projections or undercuts of the object or molded part to be provided with the veneer part. In addition, it is often desirable to give the object or molded part to be provided with the veneer part an exclusive overall impression, in order to provide an additional, aesthetically pleasing effect in addition to the wood-like look and feel.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren zur Herstellung eines neuartigen Furnierteils der eingangs genannten Art vorzuschlagen, welches einen als ästhetisch empfundenen Aufbau, aber gleichwohl eine hohe Biegefestigkeit aufweist, um ihm die Anwendung auch für Gegenstände oder Formteile mit relativ komplexen Oberflächengeometrien zu erschließen. Sie ist ferner auf ein derartiges Furnierteil sowie auf ein mit einem solchen Furnierteil versehenes Formteil gerichtet.The invention is therefore based on the object of proposing a method for producing a new type of veneer part of the type mentioned at the outset, which has an aesthetically perceived structure but nevertheless high flexural strength, so that it can also be used for objects or molded parts with relatively complex surface geometries . It is also directed to such a veneer part and to a molded part provided with such a veneer part.
In verfahrenstechnischer Hinsicht wird diese Aufgabe mit einem Verfahren gemäß dem Patentanspruch 1, zur Herstellung eines Furnierteils mit einem Geflecht oder Gewebe aus wenigstens zwei im Wesentlichen streifenförmigen Bändern gelöst, wobei mindestens eines der streifenförmigen Bänder aus Furnierholz gebildet und durch Zuschneiden eines entsprechenden Furnierholzrohlings erzeugt worden ist, wobei das Verfahren die folgenden Schritte umfasst:
- Aufbrechen der Holzfasern des mindestens einen aus Furnierholz ausgebildeten streifenförmigen Bandes oder dessen Furnierholzrohlings,
- Anordnen der streifenförmigen Bänder zu einem Geflecht oder Gewebe, und
- Verpressen des Geflechts oder Gewebes unter Erhalt des Furnierteils mit einer im Wesentlichen ebenen Oberfläche.
- Breaking up the wood fibers of the at least one strip-shaped band made of veneer wood or its veneer wood blank,
- arranging the strip-like ribbons into a braid or weave, and
- Pressing the mesh or fabric to obtain the veneer part with a substantially planar surface.
Zur Lösung dieser Aufgabe sieht die Erfindung ferner ein insbesondere mittels eines solchen Verfahrens hergestelltes Furnierteil gemäß dem Patentanspruch 9, mit einem Geflecht oder Gewebe aus wenigstens zwei im Wesentlichen streifenförmigen Bändern vor, welche unter Bildung einer im Wesentlichen ebenen Oberfläche miteinander verpresst sind, wobei mindestens eines der streifenförmigen Bänder aus Furnierholz gebildet ist.To solve this problem, the invention also provides a veneer part according to claim 9, produced in particular by means of such a method, with a mesh or fabric made of at least two essentially strip-shaped bands, which are pressed together to form an essentially flat surface, with at least one of the strip-shaped bands is formed from plywood.
Ein Ausführungsbeispiel sieht ein Formteil mit einem Furnierteil der vorgenannten Art vor, wobei das Furnierteil mit einem formstabilen Träger, insbesondere aus wenigstens einem Polymer, verbunden ist.One exemplary embodiment provides a molded part with a veneer part of the aforementioned type, the veneer part being connected to a dimensionally stable carrier, in particular made of at least one polymer.
Das erfindungsgemäße Furnierteil bzw. das mit einem solchen Furnierteil versehene Formteil vermag aufgrund der zwei oder insbesondere mehreren miteinander verflochtenen oder gewebten, im Wesentlichen streifenförmigen Bänder des Furnierteils dem Betrachter einen neuartigen ästhetischen Eindruck zu vermitteln, welcher nicht nur durch die Art sowie gegebenenfalls durch die Maserung der verwendeten Holzart, sondern insbesondere auch durch die Anordnung der streifenförmigen Bänder in dem Gewebe oder Geflecht maßgeblich bestimmt wird. Aufgrund des Verpressen des erzeugten Gewebes oder Geflechts, welches, wie weiter unten noch näher erläutert, insbesondere als Heißpressen bei erhöhter Temperatur durchgeführt werden kann, weist das Furnierteil gleichwohl eine weitestgehend ebene Oberfläche auf, so dass es eine optisch ästhetische Sichtfläche sowie eine einem herkömmlichen Furnierteil entsprechende Haptik besitzt und keine größeren Nuten bzw. Rillen aufweist, in welche sich Verschmutzungen anlagern können.The veneer part according to the invention or the molded part provided with such a veneer part is able to give the viewer a new aesthetic impression due to the two or in particular several intertwined or woven, essentially strip-shaped bands of the veneer part, which is not only due to the type and possibly the grain the type of wood used, but also in particular by the arrangement of the strip-shaped bands in the tissue or braid is decisively determined. Due to the pressing of the fabric or mesh produced, which, as explained in more detail below, can be carried out in particular as hot pressing at elevated temperature, the veneer part nevertheless has a largely flat surface, so that it has an optically aesthetic visible surface as well as a conventional veneer part has the appropriate feel and no larger grooves or grooves in which dirt can accumulate.
Aufgrund dessen, dass die Holzfasern des mindestens einen oder der insbesondere mehreren aus Furnierholz gebildeten streifenförmigen Bänder (nach dem Zuschneiden eines entsprechenden Furnierholzrohlings) oder deren Furnierholzrohlings (vor dem Zuschneiden zu den streifenförmigen Bändern) aufgebrochen werden, lässt sich dem Furnierteil ferner insbesondere eine überraschend hohe Biegefestigkeit verleihen, so dass es auch auf Formteile mit sehr komplexen Oberflächengeometrien, beispielsweise deren Kanten, Vorsprünge, Nuten, Hinterschneidungen oder dergleichen übergreifend, aufgebracht werden kann, ohne dass das Furnierteil Schaden nimmt oder gar bricht. Die Erfindung geht dabei von der Grundüberlegung aus, dass sich in erster Linie die Holzfasern der streifenförmigen Bänder bzw. des Furnierholzrohlings, aus welchem die streifenförmigen Bänder zugeschnitten werden, und insbesondere die vornehmlich in Erstreckungsrichtung der Bänder angeordneten Holzfasern begrenzend auf die Biegefestigkeit des Geflechts oder Gewebes auswirken. Das Aufbrechen der Holzfasern, insbesondere zumindest jener mit einer in Erstreckungsrichtung des im Wesentlichen streifenförmigen Bandes verlaufenden Erstreckungsrichtungskomponente, führt folglich zu einer hohen Nachgiebigkeit und folglich zu einer sehr hohen Biegefestigkeit der streifenförmigen Bänder, so dass das fertig geflochtene oder gewebte, verpresste Furnierteil zerstörungsfrei zu Geometrien mit sehr kleinen Biegungsradien formbar ist und überdies auch dauerhaft in der gewünschten Form verbleibt. Darüber hinaus erhöht die Anordnung der streifenförmigen Bänder in einem Geflecht oder Gewebe die Zug- und Biegefestigkeit des Furnierteils, so dass es gegenüber herkömmlichen Furnieren mechanisch belastbarer wird und folglich, wie weiter unten noch näher erläutert, mit einer sehr geringen Dicke ausgebildet werden kann.Due to the fact that the wood fibers of the at least one or in particular several strip-shaped bands formed from veneer wood (after a corresponding veneer wood blank has been cut to size) or their veneer wood blanks (before cutting to form the strip-shaped bands) are broken up, the veneer part can also have a surprisingly high Give flexural strength, so that it can also be applied to molded parts with very complex surface geometries, such as their edges, projections, grooves, undercuts or the like, without the veneer part being damaged or even breaking. The invention is based on the basic idea that primarily the wood fibers of the strip-shaped bands or the veneer wood blank from which the strip-shaped bands are cut, and in particular the wood fibers arranged primarily in the direction of extension of the bands, limit the bending strength of the mesh or fabric affect. The breaking up of the wood fibers, in particular at least those with a direction of extension component running in the direction of extension of the essentially strip-shaped band, consequently leads to high resilience and consequently to very high flexural strength of the strip-shaped bands, so that the finished braided or woven, pressed veneer part can be formed non-destructively into geometries with very small bending radii and also remains permanently in the desired shape. In addition, the arrangement of the strip-shaped bands in a mesh or fabric increases the tensile and flexural strength of the veneer part, so that it is mechanically more resilient than conventional veneers and consequently, as explained in more detail below, can be made with a very small thickness.
Ein mit einem solchen Furnierteil versehenes Formteil kann folglich überall dort Anwendung finden, wo bislang herkömmliche Furnierteile eingesetzt worden sind, wie beispielsweise für Fußbodenbeläge, wie Parkett, für Wand- und Deckenverkleidungen, Möbel, Musikinstrumente, Gehäuse jeglicher Art oder insbesondere auch für Fahrzeuginnenverkleidungsteile und -ausstattungen, wie Armaturenbretter, Mittelkonsolen, Türverkleidungsteile, Armauflagen, Lenkräder und dergleichen. Bei dem zweckmäßigerweise formstabilen Träger des Formteils kann es sich insbesondere um einen solchen auf der Basis von Polymeren handeln, welche zur Verbesserung ihrer mechanischen Werkstoffeigenschaften gegebenenfalls faserverstärkt sein können, wobei das Furnierteil vorgefertigt und sodann in als solcher bekannter Weise in einem Formwerkzeug angeordnet und mit einem thermoplastischen und/oder thermoelastischen Polymer hinterspritzt oder heißverpresst werden kann. Ferner ist es denkbar, dass anstelle eines plastifizierbaren thermoplastischen und/oder thermoelastischen Polymers reaktive Harze eingesetzt werden, welche gleichfalls gegebenenfalls mit Verstärkungsfasern versetzt werden können und zu einem gleichfalls thermoplastischen bzw. thermoelastischen oder auch duroplastischen Polymer ausgehärtet werden. Es sei in diesem Zusammenhang jedoch darauf hingewiesen, dass der Träger nicht notwendigerweise ein solcher auf Polymerbasis sein muss, sondern kann das erfindungsgemäße Furnierteil selbstverständlich mittels beliebiger bekannter Verbindungsmethoden, wie beispielsweise Kleben, Beschichten, (Heiß)pressen und dergleichen, auch auf andersartige Träger, wie auf der Basis von Holzfaserwerkstoffen, z.B. in Form sogenannter MDF-Werkstoffe, Gipskartonwerkstoffen und dergleichen, aufgebracht sein, wobei die sehr hohe Biegefestigkeit des Furnierteils wiederum die Möglichkeit eröffnet, es auf komplexe oder auch mit mehr oder minder scharfen Kanten, Nuten, Vorsprüngen, Hinterschneidungen etc. versehene Träger aufzubringen, wobei rein exemplarisch Einrichtungsgegenstände, wie z.B. Möbelstücke, erwähnt seien.A molded part provided with such a veneer part can consequently be used wherever conventional veneer parts have been used so far, such as for floor coverings, such as parquet, for wall and ceiling coverings, furniture, musical instruments, housings of any kind or in particular for vehicle interior trim parts and - equipment such as dashboards, center consoles, door trim parts, armrests, steering wheels and the like. The expediently dimensionally stable carrier of the molded part can in particular be one based on polymers, which can optionally be fiber-reinforced to improve their mechanical material properties, with the veneer part being prefabricated and then arranged in a mold in a manner known per se and fitted with a thermoplastic and/or thermoelastic polymer can be back-injected or hot-pressed. It is also conceivable that instead of a plasticizable thermoplastic and/or thermoelastic polymer, reactive resins are used, which can also optionally be mixed with reinforcing fibers and become a likewise thermoplastic or thermoelastic or duroplastic one Polymer are cured. In this context, however, it should be pointed out that the carrier does not necessarily have to be a polymer-based one, but the veneer part according to the invention can of course also be attached to other types of carrier by means of any known connection methods, such as gluing, coating, (hot) pressing and the like. such as on the basis of wood fiber materials, e.g. in the form of so-called MDF materials, plasterboard materials and the like, the very high flexural strength of the veneer part in turn opens up the possibility of using it on complex or with more or less sharp edges, grooves, projections, Apply undercuts, etc. provided carrier, with purely exemplary furnishings, such as pieces of furniture, are mentioned.
Mit "Gewebe" ist im Übrigen eine im Wesentlichen rechtwinklige Anordnung der im Wesentlichen streifenförmigen Bänder nach Art von Schuss- und Kettfäden eines Gewebes angesprochen. Mit "Geflecht" ist eine entsprechende Anordnung der im Wesentlichen streifenförmigen Bänder angesprochen, welche jedoch nicht notwendigerweise etwa senkrecht, sondern auch in einem praktisch beliebigen Winkel zueinander angeordnet werden können.Incidentally, "fabric" refers to an essentially right-angled arrangement of the essentially strip-shaped bands in the manner of weft and warp threads of a fabric. The term "braid" refers to a corresponding arrangement of the essentially strip-shaped bands, which, however, do not necessarily have to be arranged approximately perpendicularly, but can also be arranged at practically any angle to one another.
Es ist vorgesehen, dass das mindestens eine aus Furnierholz gebildete streifenförmige Band oder dessen Furnierholzrohling, insbesondere vor dem Aufbrechen seiner Holzfasern, auf einer Seite mit einer Haftvermittlerschicht versehen wird. Aufgrund der Haftvermittlerschicht wird einerseits die mechanische Stabilität, wie insbesondere die (Biege)festigkeit, des aus Furnierholz gebildeten streifenförmigen Bandes bzw. dessen Furnierholzrohlings erhöht - sei es anlässlich des Aufbrechens seiner Fasern, so dass die Gefahr einer Beschädigung beim Aufbrechen der Fasern gebannt wird, oder sei es in dem fertigen Furnierteil -, andererseits dient die Haftvermittlerschicht zur Erzeugung einer zuverlässigen und dauerhaften Verbindung zwischen den das Geflecht oder Gewebe bildenden streifenförmigen Bändern, wenn diese unter Bildung einer im Wesentlichen ebenen Oberfläche miteinander verpresst werden, wie insbesondere mittels Heißpressen. Sofern neben den aus Furnierholz gebildeten streifenförmigen Bändern auch aus anderen Materialien gefertigte streifenförmige Bänder zur Erzeugung des Gewebes oder Geflechts eingesetzt werden, wie es weiter unten noch näher erläutert ist, kann es sich zu letztgenanntem Zweck selbstverständlich auch anbieten, sämtliche streifenförmige Bänder mit einer derartigen Haftvermittlerschicht zu versehen.It is provided that the at least one strip-shaped band formed from veneer wood or its veneer wood blank is provided on one side with an adhesion promoter layer, in particular before its wood fibers are broken up. On the one hand, the adhesion promoter layer increases the mechanical stability, in particular the (flexural) strength, of the strip-shaped strip made of veneer wood or its veneer wood blank - be it on the occasion of the breaking up of its fibers, so that the risk of damage when the fibers break open, or be it in the finished veneer part - on the other hand the adhesion promoter layer serves to produce a reliable and permanent connection between the strip-shaped bands forming the mesh or fabric when they form a substantially flat surface are pressed together, such as in particular by means of hot pressing. If, in addition to the strip-shaped strips made of veneer wood, strip-shaped strips made of other materials are also used to produce the fabric or mesh, as is explained in more detail below, it can of course also be advisable for the latter purpose to use all strip-shaped strips with such an adhesion promoter layer to provide.
In diesem Zusammenhang kann zumindest eine Komponente der Haftvermittlerschicht vorzugsweise aus der Gruppe der thermoplastischen und/oder thermoelastischen Polymere, der - beispielsweise zu gleichfalls thermoplastischen und/oder thermoelastischen Polymere oder auch zu duroplastischen Polymeren - aushärtbaren und gegebenenfalls vernetzbaren Harze, der Schmelzklebstoffe und der Leime ausgewählt werden, wobei die Haftvermittlerschicht an einer Textil- und/oder Papierschicht immobilisiert wird. Im erstgenannten Fall kann das thermoplastische und/oder thermoelastische Polymer der Haftvermittlerschicht folglich anlässlich des Verpressens des aus den im Wesentlichen streifenförmigen Bändern gebildeten Geflechts oder Gewebes auf eine Temperatur im Bereich seiner Schmelztemperatur erwärmt werden, so dass es die streifenförmigen Bänder nach Art einer Schmelzverbindung miteinander verbindet und ein dauerhaftes Furnierteil erzeugt wird. Stattdessen kann im Falle des Einsatzes von aushärtbaren Harzen während des Verpressens des aus den im Wesentlichen streifenförmigen Bändern gebildeten Geflechts oder Gewebes eine erhöhte Temperatur im Bereich der Aushärtungs- bzw. Vernetzungstemperatur der Harze eingestellt werden, um wiederum für eine dauerhafte Verbindung der das Geflecht oder Gewebe bildenden streifenförmigen Bänder zu sorgen. Zudem ist zur dauerhaften Verbindung der im Wesentlichen streifenförmigen Bänder auch der Einsatz von Schmelzklebstoffen oder Leimen denkbar, welche während des Verpressens bei erhöhter Temperatur - oder im Falle von Leimen auch bei Umgebungstemperatur - ihre Wirkung entfalten. DieIn this context, at least one component of the adhesion promoter layer can preferably be selected from the group consisting of thermoplastic and/or thermoelastic polymers, resins that can be cured and optionally crosslinked, for example to form thermoplastic and/or thermoelastic polymers or also to form thermoset polymers, hot-melt adhesives and glues be, wherein the adhesion promoter layer is immobilized on a textile and / or paper layer. In the first-mentioned case, the thermoplastic and/or thermoelastic polymer of the adhesion promoter layer can consequently be heated to a temperature in the range of its melting temperature during the pressing of the mesh or fabric formed from the essentially strip-shaped strips, so that it connects the strip-shaped strips to one another in the manner of a fusion bond and a durable veneer part is produced. Instead, in the case of the use of curable resins during pressing of the braiding or fabric formed from the essentially strip-shaped ribbons, an elevated temperature in the range of the curing or crosslinking temperature of the resins can be set in order to ensure a permanent connection of the strip-shaped ribbons forming the braiding or fabric. In addition, the use of hot-melt adhesives or glues is also conceivable for the permanent connection of the essentially strip-shaped bands, which develop their effect during the pressing at elevated temperature - or in the case of glues also at ambient temperature. the
Haftvermittlerschicht wird an einer Textil- und/oder Papierschicht, wie beispielsweise einem vorzugsweise sehr dünnen Vlies, Geflecht, Gewebe, Gewirke, Gestricke, Gelage oder dergleichen auf der Basis von Textilfasern einschließlich Naturfasern oder einer gleichfalls vorzugsweise sehr dünnen Lage auf der Basis von Papierwerkstoffen, immobilisiert, wobei die Haftvermittlerschicht auf die Textil- bzw. Papierschicht aufgebracht oder letztere insbesondere mit dem Haftvermittler imprägniert bzw. getränkt werden kann. Die Textil- und/oder Papierschicht vermag dabei für eine noch höhere Biege- und Reißfestigkeit der im Wesentlichen streifenförmigen Bänder oder deren Furnierholzrohlings zu sorgen, sei es bei dem Aufbrechen der Holzfasern, sei es bei der Anordnung der streifenförmigen Bänder zu dem Geflecht oder Gewebe oder sei es während des (Heiß)verpressens des Geflechts oder Gewebes aus den streifenförmigen Bändern bzw. bei der Erzeugung eines Formteils mit einem erfindungsgemäßen Furnierteil, wenn letzteres gemäß der gewünschte Oberflächenkontur des Formteils verformt werden muss.The adhesion promoter layer is attached to a textile and/or paper layer, such as a preferably very thin fleece, mesh, woven fabric, knitted fabric, crocheted fabric, scrim or the like based on textile fibers including natural fibers or an equally preferably very thin layer based on paper materials, immobilized, the adhesion promoter layer being applied to the textile or paper layer or the latter being impregnated or soaked in particular with the adhesion promoter. The textile and/or paper layer is able to ensure even greater flexural and tear strength of the essentially strip-shaped strips or their veneer wood blanks, be it when the wood fibers are broken up, be it when the strip-shaped strips are arranged to form the mesh or fabric or be it during the (hot) pressing of the mesh or fabric from the strip-shaped bands or during the production of a molded part with a veneer part according to the invention, if the latter has to be deformed according to the desired surface contour of the molded part.
Die Holzfasern der aus Furnierholz ausgebildeten streifenförmigen Bänder oder deren Furnierholzrohlings können in vorteilhafter Ausgestaltung beispielsweise dadurch aufgebrochen werden, dass das aus Furnierholz gebildete streifenförmige Band oder der Furnierholzrohling durch den Zwischenraum zwischen einer ersten Walze und einer zweiten Walze hindurch bewegt wird, wobei die erste und zweite Walze insbesondere entsprechend der Bewegungsgeschwindigkeit des aus Furnierholz gebildeten streifenförmigen Bandes oder dessen Furnierholzrohlings, gegensinnig rotiert werden. Aufgrund der auf das streifenförmige Band (nach dessen Zuschnitt aus dem Furnierholzrohling) oder auf den Furnierholzrohling (vor Zuschnitt desselben zu den streifenförmigen Bändern) ausgeübten Druckkräfte der Walzen wird auf diese Weise ein möglichst schonendes Aufbrechen der Holzfasern sichergestellt, ohne das Holzmaterial im Übrigen zu zerstören oder das streifenförmige Band bzw. dessen Furnierholzrohling gar zu zerbrechen.The wood fibers of the strip-shaped bands made of veneer wood or their veneer wood blanks can be be broken up, for example, in an advantageous embodiment, in that the strip-shaped strip formed from veneer wood or the veneer wood blank is moved through the gap between a first roller and a second roller, the first and second rollers corresponding in particular to the movement speed of the strip-shaped strip formed from veneer wood or its Veneer wood blank, are rotated in opposite directions. Due to the compressive forces exerted by the rollers on the strip-shaped strip (after it has been cut from the veneered wood blank) or on the veneered wood blank (before it is cut to form the strip-shaped strips), the most gentle possible breaking up of the wood fibers is ensured without otherwise destroying the wood material or to even break the strip-shaped band or its veneered wood blank.
Zu diesem Zweck kann es sich insbesondere anbieten, wenn als erste Walze eine im Wesentlichen starre Walze, z.B. aus Metall, Stahl oder dergleichen, und als zweite Walze eine zumindest umfangsseitig nachgiebig elastische Walze, z.B. aus Gummi, Silikon oder dergleichen, wie beispielsweise eine im Wesentlichen gänzlich aus einem nachgiebig elastischen Material ausgebildete Walze oder eine im Wesentlichen starre, aber umfangsseitig mit einem solchen Material beschichtete Walze, ausgewählt werden, wobei das aus Furnierholz gebildete streifenförmige Band oder dessen Furnierholzrohling insbesondere bei seiner Bewegung durch den Zwischenraum zwischen der ersten Walze und der zweiten Walze zumindest abschnittsweise mit einer sich in Radialrichtung der Walzen erstreckenden Bewegungsrichtungskomponente umgelenkt wird. Letzteres kann insbesondere dadurch gewährleistet werden, dass der Zwischenraum zwischen den Walzen kleiner als die Gesamtdicke des Furnierholzrohlings bzw. des hieraus zugeschnittenen streifenförmigen Bandes gewählt wird, so dass dieser bzw. dieses unter Umlenkung entlang der Oberfläche der starren Walze teilweise in die Oberfläche der elastisch nachgiebigen Walze eindringt. Durch eine solche Führung des streifenförmigen Bandes oder dessen Furnierholzrohlings mit einer gewissen Umlenkung desselben in Radialrichtung der Walzen, d.h. entlang einer gekrümmten Bahn, und der nachgiebig elastischen Ausgestaltung einer der Walzen werden die Holzfasern besonders wirksam, aber gleichwohl schonend aufgebrochen, um dem Furnierholzrohling bzw. dem hieraus zugeschnittenen streifenförmigen Band eine sehr hohe Biegefestigkeit zu verleihen. Die vorgesehene Sichtseite des streifenförmigen Bandes bzw. dessen Furnierholzrohlings, d.h. die einer vorzugsweise vorgesehenen Haftvermittler- und/oder Textil- bzw. Papierschicht entgegengesetzte Seite, wird dabei entlang der nachgiebig elastischen Walze geführt, um jegliche Beeinträchtigung der sichtbaren Oberfläche zuverlässig zu vermeiden.For this purpose, it can be particularly useful if the first roller is an essentially rigid roller, e.g. made of metal, steel or the like, and the second roller is a roller that is flexible at least on the circumferential side, e.g. made of rubber, silicone or the like, such as an im Substantially entirely formed from a resiliently elastic material roller or a substantially rigid, but peripherally coated with such a material roller, can be selected, wherein the strip-shaped strip formed from veneer wood or its veneer wood blank, in particular during its movement through the gap between the first roller and the second roller is deflected at least in sections with a movement direction component extending in the radial direction of the rollers. The latter can be ensured in particular by making the space between the rollers smaller than the total thickness of the veneer wood blank or the strip-shaped band cut from this is selected, so that this or this, being deflected along the surface of the rigid roller, partially penetrates into the surface of the elastically flexible roller. By guiding the strip-shaped band or its raw veneer wood in this way with a certain deflection of the same in the radial direction of the rollers, i.e. along a curved path, and the flexible elastic design of one of the rollers, the wood fibers are broken up particularly effectively, but at the same time gently, in order to give the raw veneer wood or to give the strip-shaped tape cut from it a very high flexural strength. The intended visible side of the strip-shaped band or its veneer wood blank, ie the side opposite a preferably intended adhesion promoter and/or textile or paper layer, is guided along the flexible elastic roller in order to reliably avoid any impairment of the visible surface.
Überdies kann selbstverständlich auch vorgesehen sein, dass die aus Furnierholz gebildeten streifenförmigen Bänder oder der Furnierholzrohling, insbesondere nach dem Aufbrechen ihrer Holzfasern und/oder nach dem Aufbringen der Haftvermittlerschicht, vorzugsweise einschließlich der hiermit imprägnierten Textil- und/oder Papierschicht, zumindest an ihrer Sichtseite geschliffen werden, sofern beispielsweise ein so dünner Furnierholzrohling bzw. so dünne, hieraus zugeschnittene streifenförmige Bänder zur Erzeugung des Geflechts oder Gewebes verwendet werden sollen, welche beim Aufbrechen ihrer Fasern Schaden nehmen könnten. Der Schleifprozess ermöglicht folglich das Erreichen äußerst geringer Gesamtdicken sowie auch die Gestaltung einer sehr glatten, ästhetisch wirkenden Oberfläche des Furnierteils. Alternativ oder zusätzlich kann freilich auch das fertige Furnierteil sichtseitig geschliffen werden.In addition, it can of course also be provided that the strip-shaped bands formed from veneer or the veneer wood blank, in particular after the breaking up of their wood fibers and/or after the application of the adhesion promoter layer, preferably including the textile and/or paper layer impregnated with it, is sanded at least on its visible side if, for example, such a thin veneer wood blank or such thin strip-shaped strips cut from it are to be used to produce the mesh or fabric, which could be damaged when their fibers break open. The grinding process consequently makes it possible to achieve extremely small overall thicknesses and also to design a very smooth, aesthetically pleasing surface of the veneer part. Alternatively or additionally, the finished veneer part can also be sanded on the visible side.
In weiterhin vorteilhafter Ausgestaltung kann vorgesehen sein, dass das Geflecht oder Gewebe während des Verpressens oder nach dem Verpressen an seiner der Sichtseite entgegengesetzten Seite mit einer Haftvermittlerschicht versehen wird, welche insbesondere an einer Textil- und/oder Papierschicht immobilisiert wird, um für eine einfache Weiterverarbeitung des Furnierteils zu sorgen, anlässlich welcher das Furnierteil insbesondere auf einen - polymeren oder andersartigen - Träger aufgebracht wird, um ein formstabiles Formteil zu bilden. Die Textil- bzw. Papierschicht vermag im Falle des Aufbringens eines aus Polymermaterialien erzeugten Trägers auf das Furnierteil mittels thermoplastischer Verarbeitungsverfahren, wie Spritzgießen, Heißpressen oder dergleichen, ferner ein Durchschlagen der Polymerschmelze an die Sichtseite des Furnierteils zu verhindern, wie es als solches weitgehend aus der eingangs zitierten
Eine vorteilhafte Ausgestaltung eines erfindungsgemäßen Furnierteils zeichnet sich folglich dadurch aus, dass das Geflecht oder Gewebe aus den wenigstens zwei streifenförmigen Bändern auf einer Seite mit einer Haftvermittlerschicht, wie vorzugsweise einer solchen der vorgenannten Art, versehen ist, welche insbesondere an einer Textil- und/oder Papierschicht immobilisiert ist, um die mechanisehe Stabilität und Festigkeit des Furnierteils zu erhöhen sowie seine Weiterverarbeitbarkeit zu verbessern.An advantageous embodiment of a veneer part according to the invention is therefore characterized in that the mesh or fabric made of the at least two strip-shaped bands is provided on one side with an adhesion promoter layer, preferably one of the type mentioned above, which is attached in particular to a textile and/or Paper layer is immobilized to the mechanical To increase stability and strength of the veneer part and to improve its further processing.
Bei einem Formteil gemäß einer Ausführungsform, kann demnach vorzugsweise zwischen dem Furnierteil und dem Träger eine Haftvermittlerschicht, wie vorzugsweise eine solche der vorgenannten Art, angeordnet sein, welche insbesondere mindestens eine textile Komponente und/oder eine Komponente auf der Basis von Papierwerkstoffen aufweisen kann, welche zum Schutz gegen das Durchschlagen einer Polymerschmelze bzw. eines Flüssigharzes des Trägers während des Hinterspritzens oder Verpressens des Furnierteils zu dienen vermag und beispielsweise als Vlies, Geflecht, Gewebe, Gewirke, Gestricke, Gelege oder dergleichen ausgestaltet sein kann. Um für eine einwandfreie Schmelzverbindung des Furnierteils mit einem thermoplastischen und/oder thermoelastischen Träger zu sorgen, sollte es sich zumindest bei einem der verwendeten Haftvermittler zweckmäßigerweise um dasselbe Polymer wie jenes des Trägers oder um ein hiermit kompatibles Polymer handeln, welches z.B. gleichfalls zumindest teilweise aufgeschmolzen wird und sich einerseits mit dem Polymer des Trägers verbindet, andererseits an der der Sichtseite entgegengesetzten Seite oberflächig in das offenporige Furnierteil eindringt.In the case of a molded part according to one embodiment, an adhesion promoter layer, preferably one of the aforementioned type, can therefore preferably be arranged between the veneer part and the carrier, which can have in particular at least one textile component and/or a component based on paper materials, which is able to protect against the penetration of a polymer melt or a liquid resin of the carrier during back-injection molding or pressing of the veneer part and can be designed, for example, as a nonwoven, braided, woven, knitted, crocheted, scrim or the like. In order to ensure a perfect fusion connection of the veneer part with a thermoplastic and/or thermoelastic carrier, at least one of the adhesion promoters used should advantageously be the same polymer as that of the carrier or a polymer compatible therewith, which, for example, is also at least partially melted and on the one hand connects to the polymer of the carrier, on the other hand penetrates the surface of the open-pored veneer part on the side opposite the visible side.
Sofern gewünscht, können alle streifenförmigen Bänder des Gewebes oder Geflechts des erfindungsgemäßen Furnierteils aus wenigstens einem Furnierholzrohling zugeschnitten werden, so dass das Furnierteil im Wesentlichen gänzlich aus Holz gebildet ist. Andererseits ist es auch möglich, dem erfindungsgemäßen Furnierteil dadurch eine zusätzliche ästhetische Wirkung zu verleihen, indem wenigstens ein oder insbesondere mehrere streifenförmige Bänder aus Furnierholz bereitgestellt werden, während wenigstens ein weiteres oder insbesondere mehrere weitere streifenförmige Bänder aus der Gruppe der Metalle, der Naturstoffe und der Textilien, insbesondere aus der Gruppe Edelstahl, Kupfer, Aluminium und Eisen einschließlich deren Legierungen sowie Leder, bereitgestellt werden, welche mit den aus Furnierholz gefertigten streifenförmigen Bändern verflochten oder verwoben und anschließend verpresst werden, was zusätzliche Aspekte der ästhetischen Ausgestaltung der Sichtfläche der Furnierteile ermöglicht.If desired, all strip-shaped bands of the fabric or mesh of the veneer part according to the invention can be cut from at least one veneer wood blank, so that the veneer part is formed essentially entirely of wood. On the other hand, it is also possible to give the veneer part according to the invention an additional aesthetic effect by providing at least one or in particular more strip-shaped bands of veneer wood, while at least one other or in particular several other strip-shaped bands from the Group of metals, natural materials and textiles, in particular from the group of stainless steel, copper, aluminum and iron including their alloys and leather, which are braided or woven with the strip-shaped bands made of veneer wood and then pressed, which is additional aspects of the aesthetic design of the visible surface of the veneer parts allows.
Wie bereits erwähnt, macht es das erfindungsgemäße Verfahren insbesondere möglich, dem aus den miteinander verflochtenen oder verwebten, im Wesentlichen streifenförmigen Bändern gebildeten Furnierteil eine sehr hohe Biegefestigkeit zu verleihen, um es auch auf Träger mit komplexen Oberflächengeometrien aufbringen zu können und auf diese Weise ein entsprechendes, dekoratives Formteil zu erzeugen. Das Furnierteil weist hierbei eine Biegefestigkeit auf, welche eine zerstörungsfreie Biegung des Furnierteils um einen Winkel von 90° mit einem Biegeradius von kleiner 10 mm ermöglicht. Hierdurch wird eine Verformung des Furnierteils zu komplexen Geometrien mit sehr kleinen Biegeradien möglich, wie sie beispielsweise erforderlich sind, um Kanten oder Einkerbungen eines Trägers des Formteils mit dem Furnierteil zu überdecken. In besonders vorteilhafter Ausgestaltung kann das Furnierteil dabei eine Biegefestigkeit aufweisen, welche eine Biegung des Furnierteils um einen Winkel von 90° mit einem Biegeradius von höchstens etwa 7,5 mm, insbesondere von höchstens etwa 5 mm, vorzugsweise von höchstens etwa 3 mm oder gar etwa 2,5 mm, ermöglicht.As already mentioned, the method according to the invention makes it possible, in particular, to impart a very high flexural strength to the veneer part formed from the interlaced or woven, essentially strip-shaped bands, in order to be able to apply it to carriers with complex surface geometries and in this way a corresponding , to produce decorative molding. In this case, the veneer part has a flexural strength which enables non-destructive bending of the veneer part through an angle of 90° with a bending radius of less than 10 mm. This enables the veneer part to be deformed into complex geometries with very small bending radii, such as are required, for example, in order to cover edges or indentations of a carrier of the molded part with the veneer part. In a particularly advantageous embodiment, the veneer part can have a flexural strength which allows the veneer part to be bent through an angle of 90° with a bending radius of at most approximately 7.5 mm, in particular at most approximately 5 mm, preferably at most approximately 3 mm or even approximately 2.5mm, allows.
Wie ebenfalls bereits erwähnt, macht es das erfindungsgemäße Verfahren ferner möglich, die Gesamtdicke der einzelnen das Furnierteil bildenden, im Wesentlichen streifenförmigen Bänder und folglich die Gesamtdicke der Furnierteils selbst sehr gering zu wählen, was mit einer Material- und folglich mit einer Kostenersparnis einhergeht und darüber hinaus insbesondere eine sehr gute Verarbeitbarkeit infolge sehr klein wählbarer Biegeradien des Furnierteils gewährleistet. Die Gesamtdicke des Furnierteils beträgt hierbei höchstens 1,5 mm, wobei auch noch kleinere Dicken möglich sind, wie beispielsweise höchstens etwa 1,2 mm, insbesondere höchstens etwa 1,0 mm oder vorzugsweise höchstens etwa 0,8 mm. Dementsprechend weist zumindest das wenigstens eine aus Furnierholz gebildete streifenförmige Band eine Dicke von höchstens 0,75 mm auf, wobei auch noch kleinere Dicken möglich sind, wie beispielsweise höchstens etwa 0,6 mm, insbesondere höchstens etwa 0,5 mm oder vorzugsweise höchstens etwa 0,4 mm.As also already mentioned, the method according to the invention also makes it possible to reduce the total thickness of the individual, essentially strip-shaped parts forming the veneer part Bands and consequently the total thickness of the veneer part itself to be chosen very small, which is associated with a material and consequently with a cost saving and also ensures in particular a very good workability due to very small selectable bending radii of the veneer part. The total thickness of the veneer part is at most 1.5 mm, although smaller thicknesses are also possible, such as at most approximately 1.2 mm, in particular at most approximately 1.0 mm or preferably at most approximately 0.8 mm. Accordingly, at least the at least one strip-shaped band made of veneer wood has a thickness of at most 0.75 mm, although even smaller thicknesses are possible, such as at most about 0.6 mm, in particular at most about 0.5 mm or preferably at most about 0 .4mm.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen. Dabei zeigen:
- Fig. 1
- eine schematische Schnittansicht eines Ausschnittes einer Ausführungsform eines erfindungsgemäßen Furnierteils mit einem Gewebe oder Geflecht aus einer Mehrzahl an im Wesentlichen streifenformen Bänder aus Furnierholz;
- Fig. 2
- eine schematische Schnittansicht des Ausschnittes des Furnierteils gemäß
Fig. 1 , nachdem es um einen kleinen Radius gebogen worden ist; - Fig. 3
- eine schematische Detailansicht eines Abschnittes der aus Furnierholz gebildeten, im Wesentlichen streifenförmigen Bänder des Furnierteils gemäß
Fig. 1 und 2 im Querschnitt; und - Fig. 4
- eine schematische Seitenansicht einer Walzenanordnung zum Aufbrechen der Fasern der aus Furnierholz gebildeten, im Wesentlichen streifenförmigen Bänder gemäß
Fig. 3 des Furnierteils gemäßFig. 1 .und 2
- 1
- a schematic sectional view of a detail of an embodiment of a veneer part according to the invention with a fabric or mesh made of a plurality of essentially strip-shaped strips of veneer wood;
- 2
- a schematic sectional view of the section of the veneer part according to FIG
1 , after being bent by a small radius; - 3
- a schematic detailed view of a section according to the formed from veneer wood, essentially strip-shaped bands of the veneer part
Figures 1 and 2 in cross section; and - 4
- FIG. 12 shows a schematic side view of a roller arrangement for breaking up the fibers of the essentially strip-shaped bands formed from veneer wood according to FIG
3 according to the veneer partFigures 1 and 2 .
In der
An seiner der Sichtseite entgegengesetzten, in der
Wie der
In der
Zur Herstellung des Furnierteils wird beispielsweise zunächst ein geeigneter Furnierholzrohling (nicht gezeigt) mit einer etwa der gewünschten Dicke der streifenförmigen Bänder 1a, 1b des Furnierteils entsprechenden Dicke bereitgestellt und vorzugsweise auf einer Seite mit der Haftvermittlerschicht 4 bzw. mit der mit dem Haftvermittler imprägnierten Textil oder Papierschicht versehen. Zur Sicherstellung einer sehr hohen Biegefestigkeit werden sodann die Holzfasern des Furnierholzrohlings aufgebrochen, indem er beispielsweise durch den Zwischenraum einer Walzenanordnung geführt wird.To produce the veneer part, for example, first a suitable veneer wood blank (not shown) with a thickness corresponding approximately to the desired thickness of the strip-shaped
Ein exemplarisches Ausführungsbeispiel einer solchen Walzenanordnung ist der
Anschließend kann der Furnierholzrohling an seiner der Haftvermittlerschicht 4 entgegengesetzten Seite gegebenenfalls geschliffen werden, wonach er zu den streifenförmigen Bändern 1a, 1b zugeschnitten wird. Hierbei sollte darauf geachtet werden, dass die Schnittlinien im Wesentlichen parallel zur Bewegungsrichtung v verlaufen, mit welcher der Furnierholzrohling durch die Walzenanordnung (vgl. die
Anschließend werden die aus dem Furnierholzrohling zugeschnittenen, im Wesentlichen streifenförmigen Bänder 1a, 1b zu dem gewünschten Geflecht oder Gewebe angeordnet (vgl. hierzu insbesondere die
Claims (14)
- Method for producing a veneer part comprising a braid or web consisting of at least two substantially strip-like bands (1a, 1b), at least one of the strip-like bands (1a, 1b) being made of veneer wood and being obtained by cutting a corresponding veneer wood blank, one of the sides of the at least one strip-like band (1a, 1b) made of veneer wood or the veneer wood blank thereof being provided with an adhesion promoter layer (4), the strip-like bands (1a, 1b) being arranged to form the braid or web and the braid or web being compressed to obtain the veneer part having a substantially flat surface, characterized in that the adhesion promoter layer (4) is immobilized on a textile and/or paper layer, in that the wood fibers of the at least one strip-like band (1a, 1b) made of veneer wood or the veneer wood blank thereof are broken up, and in that at least the at least one strip-like band (1a, 1b) made of veneer wood having a thickness of at most 0.75 mm is used such that the total thickness of the veneer part obtained is at most 1.5 mm and the veneer part has a bending strength which allows the veneer part to be bent by an angle (α) of 90° with a bending radius (R) of less than 10 mm.
- Method according to claim 1, characterized in that one of the sides of the at least one strip-like band (1a, 1b) made of veneer wood or the veneer wood blank thereof is provided with the adhesion promoter layer (4) before the wood fibers thereof are broken up.
- Method according to claim 1 or claim 2, characterized in that at least one component of the adhesion promoter layer (4), which is immobilized on the textile and/or paper layer, is selected from the group consisting of thermoplastic and/or thermoelastic polymers, curable resins, hot-melt adhesives and glues.
- Method according to any of claims 1 to 3, characterized in that the wood fibers of the strip-like band (1a, 1b) made of veneer wood or the veneer wood blank thereof are broken up in that the strip-like band (1a, 1b) made of veneer wood or the veneer wood blank is moved through the space between a first roller (10) and a second roller (11), the first roller (10) and the second roller (11) being rotated in opposite directions, in particular in accordance with the speed of movement of the strip-like band (1a, 1b) made of veneer wood or the veneer wood blank thereof.
- Method according to claim 4, characterized in that a substantially rigid roller is selected as the first roller (10) and an at least circumferentially flexibly elastic roller is selected as the second roller (11), the strip-like band (1a, 1b) made of veneer wood or the veneer blank thereof, in particular during the movement thereof through the space between the first roller (10) and the second roller (11), being deflected at least in portions by means of a movement direction component extending in the radial direction of the rollers (10, 11).
- Method according to any of claims 1 to 5, characterized in that- the at least one strip-like band (1a, 1b) made of veneer wood or the veneer wood blank, in particular after the wood fibers thereof have been broken up and/or after the adhesion promoter layer (4) has been applied, and/or- the finished veneer partis or are grinded at least on the visible side thereof.
- Method according to any of claims 1 to 6, characterized in that the braid or web is provided with an adhesion promoter layer (3) on the side thereof opposite the visible side during compression or after compression, which layer is in particular immobilized on a textile and/or paper layer.
- Method according to any of claims 1 to 7, characterized in that- all strip-like bands (1a, 1b) are cut from at least one veneer wood blank, or- at least one strip-like band (1a, 1b) from the group of metals, natural materials and textiles, in particular from the group of stainless steel, copper, aluminum and iron, including their alloys and leather, is provided.
- Veneer part, in particular produced by means of a method according to any of claims 1 to 8, comprising a braid or web consisting of at least two substantially strip-like bands (1a, 1b) which are compressed to form a substantially flat surface (2), at least one of the strip-like bands (1a, 1b) being made of veneer wood and one of the sides of the at least one strip-like band (1a, 1b) made of veneer wood being provided with an adhesion promoter layer (4), characterized in that the adhesion promoter layer (4) is immobilized on a textile and/or paper layer, in that the wood fibers of the at least one strip-like band (1a, 1b) made of veneer wood is broken up, in that at least the at least one strip-like band (1a, 1b) made of veneer wood has a thickness of at most 0.75 mm, and in that the total thickness of the veneer part is at most 1.5 mm, the veneer part having a bending strength which allows the veneer part to be bent by an angle (α) of 90° with a bending radius (R) of less than 10 mm.
- Veneer part according to claim 9, characterized in that one side of the braid or web made from the at least two strip-like bands (1a, 1b) is provided with an adhesion promoter layer (3) which is in particular immobilized on a textile and/or paper layer.
- Formed part having a veneer part according to claim 9 or claim 10, wherein the veneer part is connected to a dimensionally stable support.
- Formed part according to claim 11, characterized in that the support is made from at least one polymer.
- Formed part according to claim 11 or claim 12, characterized in that an adhesion promoter layer (3) is arranged between the veneer part and the support.
- Formed part according to claim 13, characterized in that the adhesion promoter layer has at least one textile component and/or a component based on paper materials.
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DE102017000205.3A DE102017000205A1 (en) | 2017-01-13 | 2017-01-13 | Veneer part, process for its preparation and molding with such a veneer part |
PCT/EP2017/001419 WO2018130261A1 (en) | 2017-01-13 | 2017-12-12 | Veneer part, method for producing same, and moulded part having such a veneer part |
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EP3568270A1 EP3568270A1 (en) | 2019-11-20 |
EP3568270B1 true EP3568270B1 (en) | 2022-05-11 |
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EP (1) | EP3568270B1 (en) |
DE (1) | DE102017000205A1 (en) |
WO (1) | WO2018130261A1 (en) |
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DE102020214733A1 (en) | 2020-11-24 | 2022-05-25 | Volkswagen Aktiengesellschaft | Decorative part for an interior lining for a motor vehicle |
Family Cites Families (17)
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GB591479A (en) * | 1945-05-01 | 1947-08-19 | Bruno Jablonsky | Improvements in and relating to articles of bonded wood laminae |
DE80325C (en) * | ||||
US1894171A (en) * | 1927-11-08 | 1933-01-10 | Malenite Ind Ltd | Veneering |
NL52091A (en) * | 1929-03-27 | 1900-01-01 | Elmendorf Armin | |
DE727356C (en) * | 1939-06-20 | 1942-11-02 | Arthur Schumann | Process for the production of bodies from a wood mass mixed with binding agents |
GB618155A (en) * | 1946-10-28 | 1949-02-17 | Geoffrey Charles Norman | Improvements in or relating to boxes and similar containers |
AT167665B (en) * | 1948-06-04 | 1951-02-10 | Arch Wilhelm Dr Foltin | Hollow wood panel and process for its manufacture |
DE1899154U (en) * | 1963-11-09 | 1964-08-20 | Armin Elmendorf | DEVICE FOR STRETCHING AND BENDING VENEER. |
DE1896722U (en) | 1963-12-09 | 1964-07-16 | Moebelwerkstaetten Leo Bub | BRAIDED VENEER. |
DE1896058U (en) * | 1964-04-03 | 1964-07-02 | Ernst Fiedler | WOODEN PARTICLE LID. |
DE8801814U1 (en) * | 1988-02-12 | 1988-04-14 | Flechtatelier Kurt Schütz GmbH, 96215 Lichtenfels | Braided ribbon |
DE29520343U1 (en) | 1995-12-22 | 1996-03-21 | Flechtatelier Kurt Schütz GmbH, 96215 Lichtenfels | Braided ribbon |
DE19852033A1 (en) * | 1998-11-11 | 2000-05-18 | Fraunhofer Ges Forschung | Compound board material has a carrier of lignin with natural fiber reinforcement to be bonded to a decorative layer by heat and pressure |
DE19852035A1 (en) | 1998-11-11 | 2000-05-25 | Fraunhofer Ges Forschung | Composite body with a decorative layer |
DE20120158U1 (en) | 2001-12-12 | 2002-03-14 | Janson, Manfred, 96106 Ebern | Braiding material strips for the production of a flat weave or a form weave |
DE20120258U1 (en) | 2001-12-14 | 2002-03-21 | Bai, Kuo-An, Tai-Ping, Taichung | Rope control of bike |
DE102004062646B4 (en) | 2004-12-21 | 2009-04-16 | Takata-Petri Ag | Steering wheel decorative shells and interior trim elements and method for their production |
-
2017
- 2017-01-13 DE DE102017000205.3A patent/DE102017000205A1/en not_active Withdrawn
- 2017-12-12 EP EP17822132.1A patent/EP3568270B1/en active Active
- 2017-12-12 WO PCT/EP2017/001419 patent/WO2018130261A1/en unknown
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DE102017000205A1 (en) | 2018-07-19 |
WO2018130261A1 (en) | 2018-07-19 |
EP3568270A1 (en) | 2019-11-20 |
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