DE102016201765A1 - Lighting device, use of a lighting device and method for producing a lighting device - Google Patents

Lighting device, use of a lighting device and method for producing a lighting device

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Publication number
DE102016201765A1
DE102016201765A1 DE102016201765.9A DE102016201765A DE102016201765A1 DE 102016201765 A1 DE102016201765 A1 DE 102016201765A1 DE 102016201765 A DE102016201765 A DE 102016201765A DE 102016201765 A1 DE102016201765 A1 DE 102016201765A1
Authority
DE
Germany
Prior art keywords
light
lighting device
fiber composite
composite component
component
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
DE102016201765.9A
Other languages
German (de)
Inventor
Johannes Eschl
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Priority to DE102016201765.9A priority Critical patent/DE102016201765A1/en
Publication of DE102016201765A1 publication Critical patent/DE102016201765A1/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/74Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
    • B29C70/742Forming a hollow body around the preformed part

Abstract

A lighting device (1), in particular a lighting device (1) for a motor vehicle, is disclosed, which has a fiber composite component (2) and at least one light-emitting component (3). The fiber composite member (2) comprises a plastic matrix and a plurality of reinforcing fibers embedded in the plastic matrix, and has a cavity formed by removing a core. The light emitting component (3) is arranged in the cavity of the fiber composite component (2). The fiber composite component (2) is at least partially translucent for light emitted by the light emitting component (3). Furthermore, a use of a lighting device (1) and a method for producing a lighting device (1) are specified.

Description

  • A lighting device is specified. In particular, the lighting device may be a vehicle component, for example a part of an interior trim of a vehicle or a part of a vehicle body. Furthermore, a use of the lighting device and a method for producing the lighting device are specified.
  • In the prior art, it is known to produce vehicle components made of fiber composite material, which may for example comprise carbon fibers, which are embedded in a plastic matrix. The carbon fibers act as reinforcing fibers of the component, and a design of the reinforcements along the power flow lines can take place. Components made of carbon fiber reinforced plastic are characterized by a low mass and high rigidity at the same time.
  • In addition to these properties, vehicle components made of fiber composite material usually have no other functions. Furthermore, the embedded in the plastic matrix carbon fibers are usually hardly visible to the outside, so that, for example, the effort behind the development and production of such vehicle components can be conveyed to the customer only poorly.
  • It is a task to be solved at least some embodiments to provide a lighting device, which in addition to a lighting function also has the advantages of components made of fiber composite material. Another task is to make fiber-reinforced components easier to experience for customers.
  • These objects are achieved by the subject matters according to the independent patent claims. Advantageous embodiments and further developments will become apparent from the dependent claims, the following description and from the drawings.
  • The illumination device described herein comprises a fiber composite component comprising a plastic matrix and a plurality of reinforcing fibers embedded in the plastic matrix. The reinforcing fibers may be, for example, carbon fibers. Furthermore, the reinforcing fibers may be e.g. Glass fibers and / or aramid fibers. The plastic matrix, for example, a thermosetting plastic, such as a resin or synthetic resin, or consist of a thermosetting plastic. Alternatively, the plastic matrix may be e.g. have a thermoplastic material or consist of a thermoplastic material. Furthermore, the illumination device has at least one light-emitting component.
  • The fiber composite component has a cavity in the interior. The cavity is preferably made by removing a core, e.g. can be used in the manufacture of the fiber composite component manufactured. The light-emitting component is arranged in the cavity of the fiber composite component. In this case, the fiber composite component for light which is emitted by the light-emitting component is at least partially translucent. In particular, the plastic matrix surrounding the light-emitting component can be at least partially translucent for light which is imitated from the light-emitting component. For example, the illumination device may have one or more viewing surfaces, which may be formed by the plastic matrix, and may leak through the light emitted by the light-emitting component, so that it can be perceived from outside the fiber composite component or from outside the illumination device.
  • According to a further embodiment, at least 5% of the radiant energy of the light emitted by the light-emitting component emerges from the fiber composite component or from the illumination device. Preferably, this light passes through material of the plastic matrix before exiting the lighting device. According to a particularly preferred embodiment, at least 10% of the light emitted by the light-emitting component emerges from the fiber-composite component or from the illumination device, according to a further preferred embodiment at least 25%.
  • According to a further embodiment, the lighting device is a lighting device for a motor vehicle. For example, the lighting device may be an interior component of a motor vehicle. The lighting device may e.g. be used for an ambient lighting within a motor vehicle. The lighting device may e.g. Part of an instrument panel of a vehicle, part of a dashboard of a vehicle, be part of a center and / or side panel of a vehicle and / or part of an inner roof panel of a vehicle.
  • According to a further embodiment, the reinforcing fibers may have a structure or the reinforcing fibers are designed as a fiber braid. Furthermore, the reinforcing fibers can be designed as a fiber fabric and / or as a fiber fabric.
  • According to a further embodiment, the light-emitting component is designed as a light source. By way of example, the light-emitting component may be a light-emitting diode (LED) or an organic light-emitting diode (OLED).
  • According to a further embodiment, the light-emitting component is designed as a light guide body. The light guide body preferably has a light introduction surface for coupling in light emitted from a light source and at least one light exit surface for light extraction, wherein the light exit surface is arranged in the interior of the cavity. The light source may e.g. be arranged outside the cavity or outside of the fiber composite component. The light guide body may e.g. as a photoconductive fiber, e.g. be designed as a glass fiber or as an optical polymer fiber or plastic fiber, or as a light-conducting fiber bundle. Furthermore, the light guide can be made of a plastic, such as plastic. polycarbonate or polymethylmethacrylate, or glass, e.g. as one or more glass fibers exist.
  • According to a further embodiment, the light guide body has coupling elements for targeted coupling of light. The decoupling elements may be formed, for example, as scattering particles within the optical waveguide. In addition or as an alternative, the light guide body can have outcoupling elements which are designed as surface structures, as roughened areas, and / or as microprisms. Preferably, the decoupling elements are designed such that light coupled into the optical waveguide can be decoupled along the main extension direction of the optical waveguide. For example, the ratio of the light exit surface to the light introduction surface can be at least 10. Particularly preferably, the ratio of the light exit surface to the light introduction surface is at least 25.
  • According to a further embodiment, the fiber composite component has an opening through which the cavity is accessible from outside the fiber composite component. For example, the fiber composite component may have exactly one opening through which the cavity is accessible from the outside. In the manufacture of the fiber composite component, a core used for manufacture may have been removed through the opening. Furthermore, the fiber composite component may have a plurality of openings, for example exactly two openings.
  • According to a further embodiment, the opening has a size which is smaller than the largest cross-sectional area defined by the cavity. For example, the opening may have a size that is between 30% and 75% of the largest cross-sectional area defined by the cavity.
  • According to a further embodiment, the opening has a size which is less than or equal to 10%, preferably less than or equal to 5%, particularly preferably less than or equal to 2%, of the outer surface of the fiber composite component.
  • According to a further embodiment, the cavity is filled with a transparent filler which surrounds the light-emitting component. For example, the transparent filler may completely surround the light emitting device inside the cavity. The transparent filler may be e.g. to act a sealing material. On the one hand, the filler can, for example, prevent the penetration of moisture into the cavity and, on the other hand, serve to fix the light-emitting component in the interior of the cavity.
  • According to a further embodiment, the lighting device has a plurality of light-emitting components, which are arranged in the cavity of the fiber composite component. The light-emitting components may have one or more features of the embodiments mentioned in connection with the previously described light-emitting component. The light-emitting components arranged in the interior of the cavity of the fiber composite component can be connected to one another, for example, by means of electrically conductive connecting elements.
  • According to a further embodiment, the illumination device has a multiplicity of light-emitting components which are arranged in the cavity, wherein the light-emitting components are designed such that each of the light-emitting components can emit light of different wavelengths. This can produce a particularly impressive aesthetic effect.
  • Furthermore, a method for producing a lighting device is specified. The lighting device manufactured or producible by the method may have one or more features of the aforementioned embodiments.
  • The method provides a kernel. Preferably, the core is a removable core. For example, the core may be a mold core, such as, for example, so-called blow core or blow mold core. Furthermore, the core can be, for example, a salt core, a sand core or a so-called aquacore, ie one Core having a high temperature resistant water-soluble core material act.
  • Furthermore, a fiber composite component is produced by applying reinforcing fibers to the core and then curing a plastic matrix. For example, the core may be braided with the reinforcing fibers during manufacture of the fiber composite component. Furthermore, it is possible that the reinforcing fibers are wound on the core. After applying the reinforcing fibers to the core, the components may be soaked with resin, for example. The manufacture of the fiber composite component may e.g. by means of a Resin Transfer Molding (RTM) injection method. Furthermore, the production of the fiber composite component can be carried out, for example, by means of a winding method, e.g. by wrapping the core with fibers, fiber bundles or fiber ribbons embedded in a plastic matrix, the plastic matrix being formed, for example, by a heating device, such as e.g. an oven, can be activated.
  • Subsequently, the core is removed from inside the fiber composite component, e.g. by pulling the core, so that a cavity is formed in the interior of the fiber composite component. Thereafter, at least one light emitting device is disposed within the cavity of the fiber composite component. Preferably, the fiber composite component for light emitted from the light emitting device is at least partially translucent. Furthermore, it is possible for a plurality of light-emitting components to be arranged in the cavity of the fiber composite component. The light-emitting components may be e.g. be designed as light-emitting diodes, as organic light emitting diodes and or as a light guide body.
  • According to a further embodiment, the cavity is filled with a transparent filler after the arrangement of the light-emitting component or after the arrangement of the light-emitting components. After the filling process, the filler preferably surrounds the light-emitting component or the light-emitting components. For example, the cavity can be completely filled with the transparent filler. By means of the filler, the cavity can be advantageously sealed or can be a fixation of the light-emitting component or the light-emitting components in the cavity.
  • Furthermore, a use of a lighting device described here is specified as an interior component of a motor vehicle. The lighting device may e.g. used for ambient lighting within a motor vehicle. For example, the lighting device may be used as part of an instrument panel of a vehicle, as part of a dashboard of a vehicle, as part of a center and / or side panel of a vehicle, and / or as part of an interior roof panel of a vehicle.
  • Further advantages and advantageous embodiments of the illumination device described here or the manufacturing method described here will become apparent from the following in connection with the 1 to 4 described embodiments. Show it:
  • 1 a schematic representation of a lighting device according to an embodiment,
  • 2 and 3 schematic representations of lighting devices according to further embodiments, and
  • 4 a schematic representation of a method for producing a lighting device according to another embodiment.
  • In the exemplary embodiments and figures, identical or identically acting components may each be provided with the same reference numerals. The illustrated elements and their proportions with each other are basically not to be considered as true to scale. Rather, individual elements can be shown exaggeratedly thick or large in size for better representability and / or better understanding.
  • The 1 shows a schematic representation of a lighting device 1 according to a first embodiment. The lighting device 1 has a fiber composite component 2 comprising a plastic matrix and a plurality of reinforcing fibers, wherein the reinforcing fibers are embedded in the plastic matrix, and a light emitting device 3 on. The reinforcing fibers are completely embedded, for example, in the plastic matrix, that is, the plastic matrix can completely enclose the reinforcing fibers. In the embodiment shown, the reinforcing fibers are designed as carbon fibers. Alternatively, the reinforcing fibers may be formed, for example, as aramid fibers or glass fibers. In the exemplary embodiment shown, the plastic matrix is a thermoset plastic. Alternatively, the plastic matrix, for example, consist of a thermoplastic material. The reinforcing fibers may, for example, have a braided structure. Inside the fiber composite component 2 is a cavity 4 formed, which by pulling a Form core has emerged. The light-emitting component 3 is in this cavity 4 of the fiber composite component 2 arranged. Inside the cavity 4 can the light-emitting component 3 be surrounded for example by a transparent filling material. In the exemplary embodiment shown, the light-emitting component 3 designed as a light emitting diode (LED). Alternatively, the light-emitting component 3 also be a different kind of light source. The cavity 4 of the fiber composite component 2 is by a fiber composite component 2 trained opening 7 accessible from outside. In the manufacture of the fiber composite component 2 For example, the mold core used for the production through the opening 7 have been removed. As an alternative to the embodiment shown, the fiber composite component 2 For example, a plurality of openings, such as exactly two openings have.
  • The 2 shows a schematic representation of a lighting device 1 according to a second embodiment. Unlike the in 1 embodiment shown, the lighting device 1 a plurality of light-emitting components 3 on which each in the cavity 4 of the fiber composite component 2 are arranged. In the exemplary embodiment shown, the light-emitting components 3 each formed as light emitting diodes. For electrical contacting, the light-emitting diodes can be connected to one another in an electrically conductive manner. Furthermore, the light-emitting components 3 inside the cavity 4 be embedded in a transparent filler. Preferably, the fiber composite component is 2 for light coming from the light-emitting components 3 is emitted, translucent. The light-emitting components 3 For example, they may be designed such that they can emit light of different wavelengths.
  • In the 3 is a schematic representation of a lighting device 1 illustrated according to a third embodiment. Unlike the in 1 Shown embodiment, the light-emitting component as a light guide 6 formed, which light from a light source 5 outside the fiber composite component 2 is arranged, coupled and from a light exit surface, which is inside the cavity 4 is arranged, decoupled again, so that from the light exit surface of the light guide 6 decoupled light from outside the fiber composite component 2 can be perceived and at the same time the reinforcing fibers of the fiber composite component 2 can clearly appear. The light guide body 6 is formed in the embodiment shown as a glass fiber, in particular as a side light fiber. Alternatively, the light guide 6 for example, be designed as a glass fiber bundle. In which no light guide 6 have one or more polymer fibers or consist for example of a plastic, such as polycarbonate or polymethyl methacrylate.
  • The 4 shows a method of manufacturing a lighting device 1 in which, in a first method step A, a mold core, for example a blow mold core, a salt core or a sand core, is provided. Subsequently, in step B, a fiber composite component 2 by applying reinforcing fibers to the mandrel, injecting a plastic matrix and curing the plastic matrix. Producing the fiber composite component 2 can be done for example by means of a Resin Transfer Molding injection process. In method step C, the shaped body is formed to form a cavity 4 inside the fiber composite component 2 away. In a subsequent method step D, at least one light-emitting component is produced 3 in the cavity 4 of the fiber composite component 2 arranged. Here is the fiber composite component 2 preferably for light coming from the light emitting device 3 inside the cavity 4 is emitted, at least partially translucent, so that of the light-emitting component 3 emitted light from outside the lighting device 1 can be perceived. Advantageously, by the illumination in the interior of the fiber composite component 2 made the structure of the reinforcing fibers clearly visible.
  • For fixing the light emitting device 3 can the cavity 4 of the fiber composite component 2 for example, be filled with a transparent filler.
  • The features described in the embodiments shown may also be combined with each other according to further embodiments. Alternatively or additionally, the embodiments shown in the figures may have further features according to the embodiments of the general description.
  • LIST OF REFERENCE NUMBERS
  • 1
    lighting device
    2
    Fiber composite component
    3
    light-emitting component
    4
    cavity
    5
    light source
    6
    fiber-optic element
    7
    opening
    A-D
    steps

Claims (14)

  1. Lighting device ( 1 ), in particular lighting device ( 1 ) for a motor vehicle, comprising - a fiber composite component ( 2 ), which is a plastic matrix ( 21 ) and a plurality of reinforcing fibers embedded in the plastic matrix, and - at least one light-emitting component ( 3 ), - wherein the fiber composite component ( 2 ) a cavity formed by removal of a core ( 4 ), wherein the light-emitting component ( 3 ) in the cavity ( 4 ) of the fiber composite component ( 2 ), and - wherein the fiber composite component ( 2 ) for light emitted by the light emitting device ( 3 ) is emitted, at least partially translucent.
  2.  Lighting device according to claim 1, wherein the reinforcing fibers are designed as a fiber braid.
  3. Lighting device according to one of the preceding claims, wherein the light-emitting component ( 3 ) as a light source ( 5 ), in particular as a light emitting diode (LED) or as an organic light emitting diode (OLED), is formed.
  4. Lighting device according to one of claims 1 or 2, wherein the light-emitting component ( 3 ) as light guide body ( 6 ) is formed, which has a light introduction surface for coupling from a light source ( 5 ) emitted light and at least one light exit surface for light extraction, wherein the light exit surface in the cavity of the fiber composite component ( 2 ) is arranged.
  5. Lighting device according to claim 4, wherein the light guide body ( 6 ) is designed as a light-conducting fiber or as a light-conducting fiber bundle.
  6. Lighting device according to one of claims 4 or 5, wherein the light guide body ( 6 ) consists of a plastic, such as polycarbonate or polymethylmethacrylate, or glass, in particular one or more glass fibers.
  7. Lighting device according to one of claims 4 to 6, wherein the light source ( 5 ) outside the fiber composite component ( 2 ) is arranged.
  8. Lighting device according to one of the preceding claims, wherein the fiber composite component ( 2 ) an opening ( 7 ), through which the cavity ( 4 ) from outside the fiber composite component ( 2 ) is accessible.
  9. Lighting device according to one of the preceding claims, wherein the cavity ( 4 ) is filled with a transparent filler, which the light-emitting component ( 3 ) surrounds.
  10. Use of a lighting device ( 1 ) according to one of the preceding claims as an interior component of a motor vehicle.
  11. Method for producing a lighting device ( 1 ), comprising the following steps: - providing a core, - producing a fiber composite component ( 2 ) by applying reinforcing fibers to the core and curing a plastic matrix, - removing the core to form a cavity ( 4 ) in the interior of the fiber composite component ( 2 ), and - arranging at least one light-emitting component ( 3 ) in the cavity ( 4 ) of the fiber composite component ( 2 ), wherein the fiber composite component ( 2 ) for light emitted by the light emitting device ( 3 ) is emitted, at least partially translucent.
  12. The method of claim 11, wherein producing the fiber composite component (10) 2 ) by means of transfer molding, in particular by means of a Resin Transfer Molding (RTM) injection method, takes place.
  13.  Method according to one of claims 11 or 12, wherein a blow molding core is used as the core.
  14.  Method according to one of claims 11 or 12, wherein a salt core or a sand core is used as the core.
DE102016201765.9A 2016-02-05 2016-02-05 Lighting device, use of a lighting device and method for producing a lighting device Pending DE102016201765A1 (en)

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DE102016201765.9A DE102016201765A1 (en) 2016-02-05 2016-02-05 Lighting device, use of a lighting device and method for producing a lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016201765.9A DE102016201765A1 (en) 2016-02-05 2016-02-05 Lighting device, use of a lighting device and method for producing a lighting device

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DE102016201765A1 true DE102016201765A1 (en) 2017-08-10

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1197309B1 (en) * 2000-10-04 2004-04-07 Alcan Technology & Management AG Method of manufacturing fibre reinforced composite structural elements
DE202008018145U1 (en) * 2008-03-28 2011-12-22 Skidata Ag Cabinets
DE102013212694A1 (en) * 2013-06-28 2014-12-31 Bayerische Motoren Werke Aktiengesellschaft Method and shaping tool for producing a fiber composite hollow component
DE102014207949A1 (en) * 2014-04-28 2015-10-29 Bayerische Motoren Werke Aktiengesellschaft Support hollow core and method for producing a fiber-reinforced hollow component

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1197309B1 (en) * 2000-10-04 2004-04-07 Alcan Technology & Management AG Method of manufacturing fibre reinforced composite structural elements
DE202008018145U1 (en) * 2008-03-28 2011-12-22 Skidata Ag Cabinets
DE102013212694A1 (en) * 2013-06-28 2014-12-31 Bayerische Motoren Werke Aktiengesellschaft Method and shaping tool for producing a fiber composite hollow component
DE102014207949A1 (en) * 2014-04-28 2015-10-29 Bayerische Motoren Werke Aktiengesellschaft Support hollow core and method for producing a fiber-reinforced hollow component

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