DE102019135491A1 - Translucent trim part for a motor vehicle and method for producing a translucent trim part - Google Patents

Abstract

The present invention relates to a translucent trim part for a motor vehicle comprising a light-permeable base body (1) made of a translucent or transparent material, which can be radiated through for spectral ranges of visible light with low absorption, and at least one rear side opposite the intended visible side (V) (R) of the base body (1) arranged cover layer (2), wherein the cover layer (2) has a normal layer thickness (X), the cover layer (2) due to its normal layer thickness (X) and the layer material a compared to the material of the base body (1) has high absorption for spectral ranges of visible light and is therefore largely opaque, the cover layer (2) having locally defined, layer thickness-reduced areas (3) with a reduced layer thickness (Y), the cover layer (2) due to the reduced layer thickness in these areas (3) for spectral b A range of visible light is made transmissible with a low absorption, so that the cladding part is partially transilluminated. Part of the invention is also a method for producing a translucent trim part for a motor vehicle.

Description

The present invention relates to a translucent trim part for a motor vehicle comprising a light-permeable base body made of a translucent or transparent material which can be radiated through for spectral ranges of visible light with low absorption, and at least one cover layer arranged on the rear side of the base body opposite the intended visible side, wherein the cover layer has a normal layer thickness, the cover layer having a high absorption for spectral ranges of visible light compared to the material of the base body due to its normal layer thickness and the layer material and is therefore largely opaque. Part of the invention is also a method for producing a translucent trim part.

A cladding part of the generic type for a motor vehicle and a method for its production can be DE 10 2012 003 200 A1 can be removed.

The main problem with the production of translucent trim parts according to the prior art is the fact that perforations are formed by a laser beam, for example, in order to allow the coating to pass through. However, these perforations go through the entire coating, so that when the rear lighting is switched off, the perforations on the visible side can be seen during the day, or the perforations have to be made so small in diameter that large areas that can be radiated through cannot be realized and, above all, the perforations are sealed and sealed must be protected from a closure with dirt particles.

The invention therefore has the object of specifying a trim part with the features described at the outset and a method for its production which, compared to the prior art, has an improved invisibility of the partially transilluminable areas of the trim part.

• - einen lichtdurchlässigen Grundkörper aus einem transluzenten oder transparenten Material, welches für Spektralbereiche des sichtbaren Lichts mit einer geringen Absorption durchstrahlbar ist, und
• - wenigstens eine auf der der bestimmungsgemäßen Sichtseite gegenüberliegenden Rückseite des Grundkörpers angeordnete Deckschicht, wobei die Deckschicht eine Normalschichtdicke hat,

wobei die Deckschicht aufgrund ihrer Normalschichtdicke und des Schichtmaterials eine im Vergleich zu dem Material des Grundkörpers hohe Absorption für Spektralbereiche des sichtbaren Lichts aufweist und hierdurch weitgehend lichtundurchlässig ist, wobei die Deckschicht lokal definierte, schichtdickenreduzierte Bereiche mit einer reduzierten Schichtdicke aufweist, wobei die Deckschicht aufgrund der reduzierten Schichtdicke in diesen Bereichen für Spektralbereiche des sichtbaren Lichts mit einer geringen Absorption durchstrahlbar gemacht ist, sodass das Verkleidungsteil partiell durchleuchtbar ist.According to the invention, this object is achieved by a translucent trim part for a motor vehicle comprising:

• a translucent base body made of a translucent or transparent material which can be radiated through for spectral ranges of visible light with a low absorption, and
• - At least one cover layer arranged on the rear side of the base body opposite the intended visible side, the cover layer having a normal layer thickness,

The cover layer, due to its normal layer thickness and the layer material, has a high absorption for spectral ranges of visible light compared to the material of the base body and is therefore largely opaque, the cover layer having locally defined, layer thickness-reduced areas with a reduced layer thickness, the cover layer due to the reduced layer thickness in these areas for spectral ranges of visible light with a low absorption is made transmissible, so that the cladding part is partially transilluminated.

The base body is preferably three-dimensionally shaped. The base body is therefore preferably curved in all spatial directions and not just flat in only two spatial directions. The translucent or transparent material of the base body can be reinforced with a fibrous and / or needle-shaped filler. It has been shown that the morphology of the filler can be used to achieve low absorption for spectral ranges of visible light in the translucent or transparent material of the base body. At the same time, the use of a filler allows a material to be specified that has low thermal expansion and high impact strength. The filler can comprise wollastonite and / or amorphous silicon dioxide and / or cristobalite and / or feldspar and / or fused silica and / or glass and / or glass fibers. In particular, fibrous and / or needle-shaped wollastonite has proven to be particularly suitable. The filler content of the filler in the translucent or transparent material of the base body preferably has a value of 10% by volume to 30% by volume, more preferably 15% by volume to 20% by volume. The above value ranges represent the optimum between low absorption for spectral ranges of visible light and, at the same time, sufficiently low thermal expansion and high impact strength.

An additional protective layer can be provided on the intended visible side of the base body, wherein the additional protective layer can in particular comprise a silane or a silane compound. The protective layer can in particular protect against scratches or damage from particles (sand or tire abrasion). As an alternative or in addition, the protective layer can comprise a conventional clear lacquer used in the painting of trim parts. The protective layer preferably also has a low absorption for the spectral ranges of the visible light. The protective layer preferably has a protective layer thickness of 3 μm to 1500 μm.

The translucent or transparent material of the base body can preferably contain or be formed from polypropylene and / or polycarbonate and / or polyethylene terephthalate and / or acrylonitrile-butadiene-styrene and / or polymethyl methacrylate and / or polyamide.

The remaining residual layer of the regions with reduced layer thickness is preferably arranged on the side of the cover layer which rests against the base body or is arranged opposite the base body.

The reduced layer thickness is preferably in the range from 1.5 μm to 15 μm, more preferably in the range from 3 μm to 12 μm, particularly preferably in the range from 4 μm to 10 μm.

The cover layer can be arranged on a carrier film made of a translucent or transparent material, which can also be radiated through for spectral ranges of visible light with a low absorption. The carrier film preferably has a thickness in the range from 50 μm to 1000 μm, particularly preferably in the range from 150 μm to 600 μm. The carrier film is preferably arranged between the base body and the cover layer.

The cover layer can be formed by a lacquer layer or by a cover film. The lacquer of the lacquer layer is formed in particular by a liquid or powdery coating material or top lacquer that is applied to the base body or the carrier film and is or has been built up into a continuous, solid film by chemical or physical processes (e.g. evaporation of the solvent) is.

The base body preferably has a wall thickness in the range from 0.6 mm to 4 mm.

The translucent trim part can be a bumper trim or a tailgate trim or a pillar trim or a door trim or a fender trim or a roof trim or a spoiler or a radiator trim of a motor vehicle, or a component of the aforementioned parts or an assembly of the aforementioned parts or a component of the aforementioned parts.

Part of the invention is also a system comprising a panel part that can be illuminated as described above and a lighting element arranged behind the intended visible side of the base body. The light-emitting element can comprise at least one light-emitting diode and / or a light-collecting lens.

The luminous element preferably has a minimum luminosity of 500 cd / m ² .

• - einem lichtdurchlässigen Grundkörper aus einem transluzenten oder transparenten Material, welches für Spektralbereiche des sichtbaren Lichts mit einer geringen Absorption durchstrahlbar ist, und mit
• - wenigstens einer auf der der bestimmungsgemäßen Sichtseite gegenüberliegenden Rückseite des Grundkörpers angeordneten Deckschicht, wobei die Deckschicht eine Normalschichtdicke hat,

wobei die Deckschicht aufgrund ihrer Normalschichtdicke und des Schichtmaterials eine im Vergleich zu dem Material des Grundkörpers hohe Absorption für Spektralbereiche des sichtbaren Lichts aufweist und hierdurch weitgehend lichtundurchlässig ist, wobei das Verfahren die folgenden Schritte umfasst:

• - Bereitstellen des Grundkörpers,
• - Anordnen der Deckschicht auf der Rückseite des Grundkörpers , wobei hierzu eine Walze vorgesehen ist auf deren Außenumfangsfläche ein die Deckschicht bildendes Vormaterial angeordnet ist und beim Abrollen der Walze auf der Rückseite des Grundkörpers das Vormaterial auf die Rückseite aufgetragen wird,

wobei die Walze wenigstens zwei verschiedene Außenradien, und hierdurch eine gestufte Außenumfangsfläche aufweist, wobei die Segmente der Walze mit dem kleineren Außenradius die Normalschichtdicke und die Segmente der Walze mit dem größeren Außenradius eine reduzierte Schichtdicke auf der Rückseite auftragen, sodass die Deckschicht aufgrund der reduzierten Schichtdicke in diesen Bereichen mit der reduzierten Schichtdicke für Spektralbereiche des sichtbaren Lichts mit einer geringen Absorption durchstrahlbar gemacht wird, sodass das Verkleidungsteil partiell durchleuchtbar wird.The invention also relates to a method for producing a translucent trim part, in particular a trim part described above, for a motor vehicle, with:

• - A translucent base body made of a translucent or transparent material, which can be radiated through for spectral ranges of visible light with a low absorption, and with
• - At least one cover layer arranged on the rear side of the base body opposite the intended visible side, the cover layer having a normal layer thickness,

The cover layer, due to its normal layer thickness and the layer material, has a high absorption for spectral ranges of visible light compared to the material of the base body and is therefore largely opaque, the method comprising the following steps:

• - Provision of the base body,
• - Arranging the cover layer on the back of the base body, for this purpose a roller is provided on the outer circumferential surface of which a pre-material forming the cover layer is arranged and the pre-material is applied to the rear side when the roller is unrolled on the rear of the base body,

the roller having at least two different outer radii, and thereby a stepped outer peripheral surface, the segments of the roller with the smaller outer radius applying the normal layer thickness and the segments of the roller with the larger outer radius applying a reduced layer thickness on the back, so that the top layer due to the reduced layer thickness in these areas with the reduced layer thickness for spectral ranges of visible light with a low absorption is made transmissible, so that the cladding part is partially transilluminated.

The primary material can in particular comprise a top coat.

• 1: eine dreidimensionale Darstellung eines erfindungsgemäßen durchleuchtbaren Verkleidungsteils, wobei ein hinter der Sichtseite angeordnetes Leuchtelement nicht aktiviert ist;
• 2: eine weitere dreidimensionale Darstellung des erfindungsgemäßen durchleuchtbaren Verkleidungsteils aus 1, wobei ein hinter der Sichtseite angeordnetes Leuchtelement aktiviert ist;
• 3: eine Schnittdarstellung durch das erfindungsgemäße Verkleidungsteil aus 2 gemäß der dortigen Schnittlinie A - A;
• 4: einen Verfahrensschritt des erfindungsgemäßen Verfahrens;
• 5: einen weiteren Verfahrensschritt des erfindungsgemäßen Verfahrens.

In the following, the invention is explained with reference to a drawing showing only one embodiment. They show schematically:

• 1 : a three-dimensional representation of a translucent trim part according to the invention, wherein a light element arranged behind the visible side is not activated;
• 2 : Another three-dimensional representation of the translucent trim part according to the invention 1 , wherein a light element arranged behind the visible side is activated;
• 3 : a sectional view through the trim part according to the invention 2 according to the section line A - A there;
• 4th : a method step of the method according to the invention;
• 5 : a further process step of the process according to the invention.

Identical or functionally identical elements are provided with the same reference symbols in the figures.

In the 1 is a three-dimensional representation of a translucent trim part according to the invention is shown, with one behind the visible side V arranged light element 5 is not activated. The translucent trim part for a motor vehicle comprises a three-dimensionally shaped, translucent base body 1 made of a translucent or transparent material which can be radiated through for spectral ranges of visible light with a low absorption.

In the 2 is a further three-dimensional representation of the translucent trim part according to the invention from 1 shown, with one behind the visible side V arranged light element 5 is activated. Due to the backlighting of the main body 1 decorative structures and lettering can be seen that cannot be seen from the visible side when the backlighting is not activated.

• - einen dreidimensional geformten lichtdurchlässigen Grundkörper 1 aus einem transluzenten oder transparenten Material, welches für Spektralbereiche des sichtbaren Lichts mit einer geringen Absorption durchstrahlbar ist, und
• - wenigstens eine auf der der bestimmungsgemäßen Sichtseite V gegenüberliegenden Rückseite R des Grundkörpers 1 angeordnete Deckschicht 2, wobei die Deckschicht 2 eine Normalschichtdicke X hat.

In the 3 FIG. 3 is a sectional view through the trim part according to the invention from FIG 2 shown according to the section line A - A there. The translucent trim part for a motor vehicle shown there comprises:

• - a three-dimensionally shaped translucent base body 1 made of a translucent or transparent material which can be radiated through for spectral ranges of visible light with a low absorption, and
• - at least one on the intended visible side V opposite rear side R of the base body 1 arranged top layer 2 , the top layer 2 has a normal layer thickness X.

The top layer 2 has a compared to the material of the base body due to its normal layer thickness X and the layer material 1 high absorption for spectral ranges of visible light and is therefore largely opaque.

The top layer 2 However, it has locally defined areas with reduced layer thickness 3 with a reduced layer thickness Y, the top layer 2 due to the reduction in layer thickness in these areas 3 is made transmissible for spectral ranges of visible light with a low absorption, so that the cladding part is partially transilluminated.

The reduced layer thickness Y is in the range from 1.5 μm to 15 μm, preferably in the range from 3 μm to 12 μm, particularly preferably in the range from 4 μm to 10 μm.

The top layer 2 is formed by a layer of lacquer or by a cover sheet.

The basic body 1 has a wall thickness in the range from 0.8 mm to 4.5 mm.

This in 1 and 2 The translucent trim part shown shows a spoiler of a motor vehicle or a component of a spoiler of a motor vehicle.

In the 3 is also the system according to the invention consisting of a translucent paneling part according to one of the preceding claims and one behind the intended visible side V of the main body 1 arranged light element 5 shown.

• Verfahren zur Herstellung eines durchleuchtbaren Verkleidungsteils für ein Kraftfahrzeug, insbesondere eines vorstehend beschriebenen Verkleidungsteils, mit:
  • - einem lichtdurchlässigen Grundkörper 1 aus einem transluzenten oder transparenten Material, welches für Spektralbereiche des sichtbaren Lichts mit einer geringen Absorption durchstrahlbar ist, und mit
  • - wenigstens einer auf der der bestimmungsgemäßen Sichtseite V gegenüberliegenden Rückseite R des Grundkörpers 1 angeordneten Deckschicht 2, wobei die Deckschicht 2 eine Normalschichtdicke X hat,

wobei die Deckschicht 2 aufgrund ihrer Normalschichtdicke X und des Schichtmaterials eine im Vergleich zu dem Material des Grundkörpers 1 hohe Absorption für Spektralbereiche des sichtbaren Lichts aufweist und hierdurch weitgehend lichtundurchlässig ist.In the 4th and 5 Parts of the method according to the invention are shown on the basis of sectional views through the trim part to be produced or produced:

• Method for producing a translucent trim part for a motor vehicle, in particular a trim part described above, with:
  • - a translucent body 1 made of a translucent or transparent material which can be radiated through for spectral ranges of visible light with a low absorption, and with
  • - at least one on the intended visible side V opposite rear side R of the base body 1 arranged top layer 2 , the top layer 2 has a normal layer thickness X,

being the top layer 2 due to their normal layer thickness X and the layer material, a comparison with the material of the base body 1 has high absorption for spectral ranges of visible light and is thereby largely opaque.

• - Bereitstellen des Grundkörpers 1,
• - Anordnen der Deckschicht 2 auf der Rückseite R des Grundkörpers 1,

wobei hierzu eine Walze W vorgesehen ist auf deren Außenumfangsfläche A ein die Deckschicht 2 bildendes Vormaterial 2' angeordnet ist und beim Abrollen der Walze auf der Rückseite R des Grundkörpers 1 das Vormaterial 2' auf die Rückseite R aufgetragen wird. Die Walze W weist wenigstens zwei verschiedene Außenradien Z1, Z2, und hierdurch eine gestufte Außenumfangsfläche A auf. Die Segmente der Walze W mit dem kleineren Außenradius Z1 tragen hierbei die Normalschichtdicke X und die Segmente der Walze W mit dem größeren Außenradius Z2 tragen eine reduzierte Schichtdicke Y auf der Rückseite R auf, sodass die Deckschicht 2 aufgrund der reduzierten Schichtdicke Y in diesen Bereichen 3 mit der reduzierten Schichtdicke Y für Spektralbereiche des sichtbaren Lichts mit einer geringen Absorption durchstrahlbar gemacht wird, sodass das Verkleidungsteil partiell durchleuchtbar wird.The procedure consists of the following steps:

• - Provision of the base body 1 ,
• - Arranging the top layer 2 on the back R of the main body 1 ,

for this purpose a roller W. The cover layer is provided on the outer circumferential surface A thereof 2 forming primary material 2 ' is arranged and when rolling the roller on the rear side R of the base body 1 the raw material 2 ' is applied to the reverse side R. The roller W. has at least two different outer radii Z1 , Z2 , and thereby a stepped outer peripheral surface A. The segments of the roller W. with the smaller outer radius Z1 carry the normal layer thickness X and the segments of the roller W. with the larger outer radius Z2 apply a reduced layer thickness Y on the rear side R, so that the top layer 2 due to the reduced layer thickness Y in these areas 3 with the reduced layer thickness Y for spectral ranges of visible light with a low absorption is made transmissible, so that the cladding part is partially transilluminated.

The raw material 2 ' includes in particular a top coat.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 102012003200 A1 [0002]

Claims (9)

Translucent trim part for a motor vehicle comprising: - a light-permeable base body (1) made of a translucent or transparent material, which can be radiated through for spectral ranges of visible light with low absorption, and - at least one rear side (R ) of the base body (1) arranged cover layer (2), wherein the cover layer (2) has a normal layer thickness (X), the cover layer (2) due to its normal layer thickness (X) and the layer material a compared to the material of the base body (1 ) has high absorption for spectral ranges of visible light and is thereby largely opaque, characterized in that the cover layer (2) has locally defined, layer thickness-reduced areas (3) with a reduced layer thickness (Y), the cover layer (2) due to the reduced Layer thickness in these areas (3) for spectral ranges de s visible light is made transmissible with a low level of absorption, so that the cladding part can be partially transilluminated. Translucent panel according to Claim 1 , characterized in that the reduced layer thickness (Y) is in the range from 1.5 µm to 15 µm, preferably in the range from 3 µm to 12 µm, particularly preferably in the range from 4 µm to 10 µm. Translucent panel according to Claim 1 or 2 , characterized in that the cover layer (2) is arranged on a carrier film (4) made of a translucent or transparent material which can also be radiated through for spectral ranges of visible light with a low absorption. Translucent trim part according to one of the preceding claims, characterized in that the cover layer (2) is formed by a lacquer layer or by a cover film. Transilluminable lining part according to one of the preceding claims, characterized in that the base body (1) has a wall thickness in the range from 0.6 mm to 4 mm. Transilluminatable trim part according to one of the preceding claims, characterized in that the transilluminable trim part is a bumper trim or a tailgate trim or a pillar trim or a door trim or a fender trim or a roof trim or a radiator trim or a spoiler of a motor vehicle, or a component of the aforementioned parts or an assembly of the aforementioned parts or a component part of the aforementioned parts. System composed of a translucent paneling part according to one of the preceding claims and a light element (5) arranged behind the intended visible side (V) of the base body (1). Method for producing a translucent trim part for a motor vehicle, in particular a trim part according to one of the Claims 1 to 6th , with: - a light-permeable base body (1) made of a translucent or transparent material, which can be radiated through for spectral ranges of visible light with a low absorption, and with - at least one rear side (R) of the base body opposite the intended visible side (V) (1) arranged top layer (2), the top layer (2) having a normal layer thickness (X), the top layer (2) due to its normal layer thickness (X) and the layer material having a high absorption compared to the material of the base body (1) for spectral ranges of visible light and is thereby largely opaque, characterized in that the method comprises the following steps: - providing the base body (1), - arranging the cover layer (2) on the rear side (R) of the base body (1), for this purpose, a roller (W) is provided on the outer circumferential surface (A) of a pre-material (2 ') forming the cover layer (2) is organized and when the roller rolls on the back (R) of the base body (1), the pre-material (2 ') is applied to the back (R), the roller (W) having at least two different outer radii (Z1, Z2), and thereby has a stepped outer circumferential surface (A), the segments of the roller (W) with the smaller outer radius (Z1) the normal layer thickness (X) and the segments of the roller (W) with the larger outer radius (Z2) a reduced layer thickness (Y) on the rear side (R) so that the cover layer (2) is made transparent due to the reduced layer thickness (Y) in these areas (3) with the reduced layer thickness (Y) for spectral ranges of visible light with low absorption, so that the cladding part is partially translucent. Method for producing a translucent trim part for a motor vehicle according to Claim 8 , characterized in that the starting material (2 ') comprises a topcoat.

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