DE102012007593A1 - Decorative molding portion used as lining portion of motor vehicle, has veneer section whose visible side is subjected to metallization process, by deposition of metal from gas phase - Google Patents

Decorative molding portion used as lining portion of motor vehicle, has veneer section whose visible side is subjected to metallization process, by deposition of metal from gas phase

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Publication number
DE102012007593A1
DE102012007593A1 DE201210007593 DE102012007593A DE102012007593A1 DE 102012007593 A1 DE102012007593 A1 DE 102012007593A1 DE 201210007593 DE201210007593 DE 201210007593 DE 102012007593 A DE102012007593 A DE 102012007593A DE 102012007593 A1 DE102012007593 A1 DE 102012007593A1
Authority
DE
Germany
Prior art keywords
veneer
metallization
visible
decorative molding
reinforcing layer
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.)
Pending
Application number
DE201210007593
Other languages
German (de)
Inventor
Klaus Bieniek
Thomas Weisser
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.)
Quin GmbH
Original Assignee
Quin GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE202011005269.9 priority Critical
Priority to DE202011005269U priority patent/DE202011005269U1/en
Application filed by Quin GmbH filed Critical Quin GmbH
Priority to DE201210007593 priority patent/DE102012007593A1/en
Publication of DE102012007593A1 publication Critical patent/DE102012007593A1/en
Pending legal-status Critical Current

Links

Abstract

The present invention relates to a decorative molded part with a veneer part, in particular as a lining part for a motor vehicle, which is provided on its back with a reinforcing layer and on its visible side with a transparent cover, and wants a novel, aesthetically pleasing decorative part and a method for its production specify. To solve the product-related problem, it is proposed to provide metallization on the visible side of the veneer part by separating metal from the gas phase. To produce such a decorative molded part, the present invention proposes a method in which a veneer part is placed in an injection mold and overmolded on its back with a reinforcing layer, the intermediate product thus produced is provided with a metallization on its visible side and then the metallized visible side of the veneer part is provided with a transparent cover.

Description

  • The present invention relates to a decorative molding with a decorative part, which is provided on its rear side with a reinforcing layer and on its visible side with a transparent cover. In particular, the present invention relates to such a decorative molding in which the decorative part is formed by a veneer part, in particular a thin-layer veneer part. The reinforcing layer and the transparent cover on the visible side can be provided in a manner as it is known from JP 30-30922 A is known. In this prior art, the back reinforcing layer is formed by insert molding the decorative part. Thereafter, a transparent cover is formed by overspraying on the visible side. The transparent cover can also be colored. Usually, the decorative molding is produced by means of two-component injection molding on a turning tool. The present invention further relates to a method for producing such a decorative molding.
  • Corresponding decorative moldings are used as lining parts, in particular in a motor vehicle. Thus, the present invention will specifically specify a decorative molding as a lining part for a motor vehicle.
  • In motor vehicles very high demands are placed on the aesthetic design of the vehicle interior. These also cover decorative moldings as lining parts for the vehicle interior. Accordingly, the decorative molding must meet its own particular aesthetic requirements and also be designed in such a way that it fits into the rest of the design of the vehicle interior.
  • In addition to the previously presented prior art, the applicant refers to the DE 43 01 444 C2 , as well as the DE 41 24 297 A1 and finally the DE 41 22 412 A1 as relevant state of the art.
  • The present invention is based on the problem of specifying a novel appearing, aesthetically pleasing decorative part and a method for its production.
  • To solve the above problem, the present invention proposes a decorative molding having the features of claim 1. This decorative molding comprises a veneer part, in particular a thin-layer veneer part, d. H. a veneer piece with a thickness of between 0.2 and 0.8 mm. This veneer part may be converted to a three-dimensionally shaped preform, for example with the application of heat and / or steam, before the application of the reinforcing layer or the transparent cover so that the veneer part is already in that spatial extent and more complex, three-dimensional formation in which the later decorative molding in the vehicle interior shows. After that, the veneer part can show light edges and radii. In particular, the veneer part is concave and / or curved with the course of the later decorative molded part. Regularly, the reshaping takes place in such a way that the edge of the veneer part is completely or partially folded around to form a visible edge in order to create the appearance of a solid wood part in a lateral view of the molded part.
  • The reinforcement layer may comprise overmolded fastening elements, such as screws or nuts, which simplify the easier assembly of the decorative molding on the motor vehicle. The encapsulation of the veneer part and removal from the injection molding tool usually take place with a dimension that is greater than the dimension of the finished decorative molding. Thereafter, preferably, trimming of the edges to produce the decorative molding with the final dimensional shape. The edges which have been exposed by cutting and possibly sealed beforehand during injection molding are subsequently covered by applying a seal, so that the veneer part is fully protected from environmental influences. The cover can be done by painting only the cutting edge.
  • The decorative molding according to the invention is characterized by a metallization applied on the visible side of the veneer part. This metallization is formed by depositing metal from the gas phase. The metallization can be applied by means of PVD (Physical Vapor Deposition) or CVD (Chemical Vapor Deposition). Both methods are known in the art.
  • The peculiarity of the decorative molding according to the invention consists in the metallization of the surface by depositing metal from the gas phase. This creates the opportunity to obtain the fine structure of the veneer part, which is not possible, for example, when painting with metallic paint. Thus, the finished decorative molding shows the wood-like appearance of a veneer part, but at the same time has a metallic appearance, which makes up the special appeal of the decorative molding according to the invention for use as a lining part in a motor vehicle.
  • The deposited on the visible side of the veneer part metal is preferably selected from a group consisting of: aluminum, rhodium, silicon, chromium, nickel and indium and alloys thereof and / or steel. Particularly preferred are Ti, Zr, Cr, Mo, Rh, Al, Si, alloys thereof / or stainless steel. Preferred alloys are, for example, CrAl, RhAl, MoAl and CrZr.
  • The metallization of the decorative molding according to the invention is usually carried out gradually, d. H. Each individual metal layer of the metal coating consisting of one or more superimposed identical or different metal layers is deposited successively in layers. In each case, a metal, a metal alloy or a metal-ceramic composition of defined composition is deposited in layers in succession. The content of a specific element within a single metal layer of the metal coating may vary from the first metal layer resting on the surface of the material or of the component to the last metal layer, ie. H. especially continuously increase or decrease. Furthermore, the thickness of the individual metal layers of the metal coating can also vary from the first metal layer resting on the surface of the material or of the component to the last metal layer, ie. H. especially continuously increase or decrease. The sequence of the individual metal layers and their chemical compositions are primarily determined by the desired optical effect of the decorative molding by the modification of the veneer part at its surface due to the applied metallization. However, this should be designed so that through the metallization through the wood structure and grain of the veneer part is recognizable, d. H. the metallization is still permeable.
  • The metallization has a different total layer thickness depending on the desired optical transmission. The total layer thickness is preferably produced by applying a plurality of individual coatings. In the case of a partially opaque metal coating, the total layer thickness of the metal coating is 20 to 200 nm, preferably 40 to 120 nm. The number of superimposed metal layers of the semipermeable metal coating is preferably in the range of 1 to 50, more preferably in the range of 3 to 25. In the case In the case of a low-permeability metal coating, the total layer thickness of the metal coating is 100 to 500 nm for 4 to 80 superimposed metal layers. Preferably, the thickness of a single semipermeable metal layer of the metal coating is from 3 to 120 nm. The semipermeable metal coatings of the decorative molding have a transmission of visible light in the range of 0.5% to 60%, preferably in the range of 3% to 30%.
  • If appropriate, one or more of the superimposed identical or different metal layers of the metallization of the decorative molding may be metal-ceramic layers, such as ZrN or TiCrCN. These give the metallization and thus the decorative molded part special optical but also mechanical properties, such as hardness.
  • In a further preferred embodiment, the metallization of the decorative molded part according to the invention consists of one or more superimposed different metal layers which alternately consist of aluminum (Al) or an alloy thereof and molybdenum (Mo) or an alloy thereof. In a further preferred embodiment, the metallization consists of one or more superimposed different metal layers which alternately consist of aluminum (Al) or an alloy thereof and chromium (Cr) or an alloy thereof. Instead of Cr, it is also possible to use rhodium (Rh) or an alloy thereof or else Si or an alloy thereof and / or stainless steel. Particularly preferred embodiments of the above embodiments include metallizations of one or more superposed different metal layers alternately made of Al and Mo, Al and Cr, Al and Rh, Al and Si, and Al and stainless steel.
  • With the aid of the layer structure of the metal coating of the decorative molding described above, in addition to the adhesive strength, depending on the chemical composition and the type and sequence of the individual metal layers, various optical effects can be achieved. For example, with molybdenum a yellow to reddish tint, with chrome a blue cast or with aluminum a white cast can be achieved. Furthermore, due to their specific chemical composition, the individual metal layers of the overall coating open up the possibility of selective, wavelength-dependent transmission, as a result of which different color effects can be produced and combined with one another.
  • When the metallization is applied directly to the surface of the veneer part by a PVD process, the metal coating consisting of one or more superimposed identical or different metal layers is preferably applied by vapor deposition, sputtering and arc evaporation.
  • In the preferable sputtering, a process gas such as a rare gas, preferably argon (Ar), is ionized and accelerated to the target to be deposited by means of magnetic field assist. In the present case, for example, as in the German patent application DE 36 13 018 A1 disclosed magnetron sputtering cathode with a specific power of 5 to 20 W / cm 2 and a voltage of 300 to 500 V at a pressure in the process chamber of 10 -3 to 10 -2 mbar are operated.
  • Depending on the required metallic or metal-ceramic appearance of the decorative molding according to the invention, all suitable metals and alloys can be used as target materials, particularly preferably the abovementioned metals and their alloys or ceramics.
  • On the wood surface of the tempered at a temperature of 30 ° C to 60 ° C veneer part usually a negative voltage of -25 to -80 V is applied. The duration of the coating is 20 seconds to 80 seconds for the production of a partially permeable metal coating. It is also preferable during sputtering to deposit one or more metal-ceramic layers, usually in the presence of a reaction gas. The metal-ceramic coatings such as ZrN or TiCrCN impart a special color to the metal coating and increase certain mechanical properties such as hardness, abrasion resistance and toughness.
  • In a further preferred embodiment of the invention, the surface of the veneer part is pretreated with a primer in order, for example, to improve the adhesion properties on the surface of the veneer part.
  • With regard to the procedural aspect, the present invention proposes a method having the features of claim 6. In this method for producing a decorative molding a veneer part is inserted into an injection mold and over-injected on its back with a reinforcing layer. The intermediate product thus produced is provided on its visible side with a metallization. The metallization can be generated in the manner already described by one or more metal layers deposited on the surface of the veneer part. Subsequently, the intermediate product is inserted into a further injection mold, and the metallized visible side of the veneer part is provided with a transparent cover. The cover is produced, for example, from PMMA or PET. After this production, the veneer part is coated on both sides and has a metallic appearance on its visible side.
  • According to a preferred embodiment of the present invention, the reinforcing layer and / or the transparent cover is formed only on a partial surface of the veneer part. The region of the veneer part which projects beyond this partial area is usually provided with bores which serve for positioning the veneer part in the injection mold and into which positioning pins of the injection mold are held, which hold the prepared veneer part. The region of the veneer part that projects beyond the reinforcement layer and / or the transparent cover accordingly forms a fastening region, via which the veneer part is positioned in the injection mold (s). In a manner known per se, the veneer part can be over-injected on both sides in a two-component turning tool. In this case, after the formation of the back reinforcing layer and after the mold has been opened, a spray head, for example with a robot or the like, is usually introduced into the injection mold in order to apply the metallization on the visible side of the veneer part. If special process parameters are to be observed for this purpose, for example, the veneer part is to be subjected to a voltage, this is done by the injection mold holding the intermediate product. With this procedure, a complex final forming and later loading of the intermediate product after the application of the metallization can be avoided. If necessary, the portion of the veneer part not intended for metallization can be covered, so that when the metallization is applied the corresponding metallic constituents can not be deposited on the injection mold and impair it.
  • According to a preferred development of the present invention, the veneer part is blasted prior to the application of the metallization. In this blasting, small particles are shot onto the surface of the veneer part, usually by air pressure. The grain size of the lumped particles depends on the microstructure of the veneer part. The blasting is done with the aim to remove more soft wood components of the veneer part and thereby emphasize the topology of the veneer part. The degree of emphasis depends on the thickness of the metallization. The aim is to maintain a clear impression of wood despite the overlapping of the veneer caused by the metallization.
  • According to a preferred embodiment of the present invention, the blasting is carried out with glass beads. These usually have a particle size range such that the diameter of the glass beads is between 7 and 300 μm.
  • Preferably, after blasting and before metallization, a primer is applied to the veneer part based on acrylic or two-component PUR-based, silanol-based and / or maleic acid-hydride polymer. Through this primer, the adhesion between the surface of the veneer part and the metallization improved. Additionally or alternatively, the surface of the veneer part can be improved by means of low-temperature plasma treatment. The low temperature plasma treatment may be performed before and / or after the application of the primer.
  • According to a preferred embodiment of the present invention, the veneer part is cut after the formation of the transparent cover and the decorative molding is brought to Gauge. When trimming the or the attachment areas are removed and brought the decorative molding to the mounting size in the vehicle. In this case, at least located between the transparent cover of the reinforcing layer areas of the veneer part are exposed. These exposed surfaces of the veneer part are subsequently sealed, so that the veneer part is hermetically sealed in the decorative molded part.
  • Hereinafter, a concrete embodiment will be described. In this first a veneer part is ground on both sides and dried. Thereafter, the veneer part is blasted with glass beads. The glass beads have a diameter of between 70 and 110 microns. The treatment is carried out with the aim of removing soft structures of the veneer part reinforced, so that the topology is emphasized on the surface of the veneer part. Thereafter, the veneer part is treated in a low-temperature plasma. Finally, an acrylic primer is applied to the veneer part. Thereafter, the veneer part is cut to size in a stamping-bending process and also formed, so that a substantially three-dimensional curved design results. Thereafter, the veneer part is inserted into a first injection mold. The base of the veneer part is larger than the mold cavity for forming the back reinforcing layer in said injection mold. Rather, the injection mold pins, which are outside the actual dividing plane, which separates the two mold halves to form the cavity from each other, and which are introduced into holes of a mounting portion of the veneer part. This attachment area is outside the mold cavity and serves only for the positioning and temporary fixation of the veneer part. Thereafter, the injection mold is closed, and on the back of the veneer part, the reinforcing layer is formed. This usually has by encapsulation associated with nuts or screws for attachment of the subsequent decorative molding.
  • After opening the injection mold, a metallization is still applied to the so-produced intermediate product in the injection mold. In the embodiment, layers of chromium and aluminum are applied alternately with a robot. First, a chromium layer is applied to the veneer part as an adhesive layer with a thickness of about 40 nm. An aluminum coating of 10 nm is applied to this chromium coating. This is followed by another chrome layer with a thickness of 10 mm. The robot carries thereby different heads for discharging the metal and beyond a sealing applied to the injection mold and the veneer part basically sealingly surrounding process chamber.
  • Thereafter, the intermediate product is rotated on a turning plate, so that the visible side is now exposed to a second cavity. In this cavity, a transparent cover is sprayed onto the metallized visible side.
  • Thereafter, the product coated on both sides is removed from the mold. The mounting area of the veneer part is removed. The product is cut, d. H. Milled, so that a component is produced with the final dimensions. Thereafter, the exposed by cutting edges of the veneer part are sealed, for example by a paint job. The component in question may be, for example, a decorative insert of a center console or an armrest. In this product, the veneer part is hermetically sealed from the environment, either by the back coating or the transparent cover or the extensive paint. The veneer part can be recognized with its wood grain. However, it is provided due to the metallization with a shiny metallic surface, through which the wood grain shimmers through, so that an aesthetically particularly sophisticated, technically seeming appearance is created.
  • QUOTES INCLUDE IN THE DESCRIPTION
  • This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
  • Cited patent literature
    • JP 30-30922A [0001]
    • DE 4301444 C2 [0004]
    • DE 4124297 A1 [0004]
    • DE 4122412 A1 [0004]
    • DE 3613018 A1 [0017]

Claims (14)

  1. Decorative molding with a veneer part, in particular as a lining part for a motor vehicle, which is provided on its back with a reinforcing layer and on its visible side with a transparent cover, characterized in that on the visible side of the veneer part metallization by depositing metal is provided from the gas phase ,
  2. Decorative molding according to claim 1, characterized in that the veneer part is provided as a three-dimensionally shaped preform.
  3. Decorative molding according to claim 1 or 2, characterized in that the reinforcing layer and the cover are formed by encapsulation of the veneer part.
  4. Decorative molding according to claim 1 or 2, characterized in that the edge of the veneer part is sealed by a coating connecting the reinforcing layer and the cover.
  5. Decorative molding with a veneer part, which is provided on its back with a reinforcing layer and on its visible side with a transparent cover, characterized in that the metal is at least one element selected from the group consisting of: aluminum, steel, chromium-nickel and indium.
  6. Method for producing a decorative molded part, in which a veneer part is inserted into an injection mold and over-injected on its rear side with a reinforcing layer, the intermediate product thus produced is provided on its visible side with a metallization and then the metallized visible side of the veneer part is provided with a transparent cover.
  7. A method according to claim 6, characterized in that the reinforcing layer and / or the cover is formed only on a partial surface of the veneer part and that the veneer part is positioned and fixed at its mounting surface projecting beyond the partial surface in the injection mold.
  8. A method according to claim 6 or 7, characterized in that the veneer part is blasted prior to the application of the metallization.
  9. A method according to claim 8, characterized in that the veneer part is blasted with glass beads having a diameter of between 7 and 300 microns.
  10. Method according to one of claims 6 to 9, characterized in that a primer is applied to the veneer part.
  11. A method according to claim 10, characterized in that the primer comprises acrylic and / or a two-component polyurethane and / or silanol and / or a maleic acid hydride polymer.
  12. A method according to any one of claims 8 to 11, characterized in that the surface of the veneer part is treated before or after the application of the primer by means of low-temperature plasma.
  13. Method according to one of the preceding claims, characterized in that the veneer part is cut after the formation of the transparent cover and the decorative molded part is brought to Gauge.
  14. A method according to claim 13, characterized in that exposed by cutting surfaces of the veneer part are sealed.
DE201210007593 2011-04-14 2012-04-16 Decorative molding portion used as lining portion of motor vehicle, has veneer section whose visible side is subjected to metallization process, by deposition of metal from gas phase Pending DE102012007593A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE202011005269.9 2011-04-14
DE202011005269U DE202011005269U1 (en) 2011-04-14 2011-04-14 Decorative molding
DE201210007593 DE102012007593A1 (en) 2011-04-14 2012-04-16 Decorative molding portion used as lining portion of motor vehicle, has veneer section whose visible side is subjected to metallization process, by deposition of metal from gas phase

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201210007593 DE102012007593A1 (en) 2011-04-14 2012-04-16 Decorative molding portion used as lining portion of motor vehicle, has veneer section whose visible side is subjected to metallization process, by deposition of metal from gas phase

Publications (1)

Publication Number Publication Date
DE102012007593A1 true DE102012007593A1 (en) 2012-10-18

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DE202011005269U Active DE202011005269U1 (en) 2011-04-14 2011-04-14 Decorative molding
DE201210007593 Pending DE102012007593A1 (en) 2011-04-14 2012-04-16 Decorative molding portion used as lining portion of motor vehicle, has veneer section whose visible side is subjected to metallization process, by deposition of metal from gas phase

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DE202011005269U Active DE202011005269U1 (en) 2011-04-14 2011-04-14 Decorative molding

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3613018A1 (en) 1986-04-17 1987-10-22 Santos Pereira Ribeiro Car Dos Magnetron spraying cathode
DE4122412A1 (en) 1991-07-06 1993-01-14 Bayer Ag Moulding prodn. with decorative surface - by inserting decorative material with edge bent inwards in injection moulding tool
DE4124297A1 (en) 1991-07-22 1993-01-28 Pelz Ernst Empe Werke Prodn. of impervious liner - by e.g. backing substrate with e.g. aluminium, placing combination in suitable mould, injecting e.g. acrylic polymer to cover face and edges
DE4301444C2 (en) 1993-01-20 1995-08-31 Pelz Ernst Empe Werke Method for producing a lining part and in particular a lining part produced according to it

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3613018A1 (en) 1986-04-17 1987-10-22 Santos Pereira Ribeiro Car Dos Magnetron spraying cathode
DE4122412A1 (en) 1991-07-06 1993-01-14 Bayer Ag Moulding prodn. with decorative surface - by inserting decorative material with edge bent inwards in injection moulding tool
DE4124297A1 (en) 1991-07-22 1993-01-28 Pelz Ernst Empe Werke Prodn. of impervious liner - by e.g. backing substrate with e.g. aluminium, placing combination in suitable mould, injecting e.g. acrylic polymer to cover face and edges
DE4301444C2 (en) 1993-01-20 1995-08-31 Pelz Ernst Empe Werke Method for producing a lining part and in particular a lining part produced according to it

Also Published As

Publication number Publication date
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