DE3230491A1 - Plastics reflector for luminaires, especially for luminaires and headlamps of motor vehicles - Google Patents

Plastics reflector for luminaires, especially for luminaires and headlamps of motor vehicles

Info

Publication number
DE3230491A1
DE3230491A1 DE19823230491 DE3230491A DE3230491A1 DE 3230491 A1 DE3230491 A1 DE 3230491A1 DE 19823230491 DE19823230491 DE 19823230491 DE 3230491 A DE3230491 A DE 3230491A DE 3230491 A1 DE3230491 A1 DE 3230491A1
Authority
DE
Germany
Prior art keywords
reflector
luminaires
lights
motor vehicles
headlamps
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.)
Withdrawn
Application number
DE19823230491
Other languages
German (de)
Inventor
Friedrich 7410 Reutlingen Marahrens
Heinrich 7440 Nürtingen Schmid
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19823230491 priority Critical patent/DE3230491A1/en
Publication of DE3230491A1 publication Critical patent/DE3230491A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/10—Homopolymers or copolymers of methacrylic acid esters
    • C08L33/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

Colourless, transparent polycarbonate (PC) and colourless, transparent polymethyl methacrylate (PMMA) are mixed in proportions of approximately 50 per cent by weight each and processed in injection moulding systems in a manner known per se to form reflectors. The degree of reflection of the paraboloidal inner surface of the reflectors reaches such a high quality that an additional reflection layer is not necessary.

Description

Kunststoff-Reflektor für Leuchten, insbesonderePlastic reflector for lights, in particular

für Leuchten und Scheinwerfer von Kraftfahrzeugen Stand der Technik Die Oberfläche bekannter Kunststoff-Reflektoren weist bereits eine sehr hohe Güte auf. Sie ist zwar so hoch, daß die Reflexionsschicht unmittelbar auf die paraboloide Innenseite des Reflektors aufgebracht werden kann, notwendig ist aber eine gesonderte Reflexionsschicht, Diese wird in einem getrennten Arbeitsgang hergestellt, und zwar durch Bedampfen mit Aluminium oder Beschichten mit Lack.State of the art for lights and headlights of motor vehicles The surface of known plastic reflectors is already of a very high quality on. It is so high that the reflective layer directly on the paraboloid Inside of the reflector can be applied, but a separate one is necessary Reflective layer, This is produced in a separate operation, namely by vapor deposition with aluminum or coating with lacquer.

Aufgabe der Erfindung Der Erfindung liegt die Aufgabe zugrunde, die Fertigung von Reflektoren aus Kunststoff derart weiterzubilden, daß eine separate Reflexionsschicht nicht mehr erforderlich ist.OBJECT OF THE INVENTION The invention is based on the object that Manufacture of reflectors made of plastic in such a way that a separate Reflective layer is no longer required.

Lösung der Aufgabe Diese Aufgabe wird durch die im Anspruch 1 angegebenen Maßnahmen gelöst. Der Erfindung liegt der Gedanke zugrunde, die beiden Mischungskomponenten so auszuwählen, daß die geforderten optischen Werte der paraboloiden Innenseite des Reflektors bereits bei der Formgebung des Reflektors erreicht werden.The solution to the problem This problem is solved by what is specified in claim 1 Measures resolved. The invention is based on the idea of the two mixture components to be selected so that the required optical values of the parabolic inside of the reflector can already be achieved in the shaping of the reflector.

Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben. Mit der Ausgestaltung des Reflektors nach Anspruch 2 wird ein hoher Reflexionsgrad der paraboloiden Innenseite des Reflektors erreicht.Advantageous further developments of the invention are set out in the subclaims described. With the design of the reflector according to claim 2, a high Reflectance of the paraboloid inside of the reflector reached.

Durch die Maßnahmen nach Anspruch 3 läßt sich ein noch höheren Ansprüchen genügender Reflexionsgrad erzielen.The measures according to claim 3 can be even higher claims achieve sufficient reflectance.

Beschreibung eines Ausführungsbeispieles Farbloses, transparentes Polycarbonat (Kurzzeichen PC) und farbloses, transparentes Polymethyl-Methacrylat (Kurzzeichen PMMA) werden zu gleichen Gewichtsteilen gemischt. Diese Mischung ist Ausgangsprodukt für die an sich bekannte Herstellung von Reflektoren für Leuchten, insbesondere für Leuchten und Scheinwerfer von Kraftfahrzeugen, in herkömmlichen Spritzanlagen Die so gespritzten Reflektoren haben insbesondere auf der paraboloiden Innenseite einen derart hohen Reflexionsgrad (Reflexionsgüte), daß diese für die Reflexion der von der Glühlampe abgestrahlten Lichtstrahlen ausreicht.Description of an exemplary embodiment Colorless, transparent Polycarbonate (abbreviation PC) and colorless, transparent polymethyl methacrylate (Abbreviation PMMA) are mixed in equal parts by weight. This mix is Starting product for the known production of reflectors for lights, especially for lights and headlights of motor vehicles, in conventional Spraying systems The reflectors sprayed in this way have especially on the paraboloid Inside such a high degree of reflection (reflection quality) that this for the Reflection of the light rays emitted by the incandescent lamp is sufficient.

Mithin ist keine Bedampfung durch Aluminium oder keine Beschichtung mit Lack der paraboloiden Innenseite des Reflektors erforderlich.There is therefore no vapor deposition through aluminum or no coating with lacquer on the paraboloid inside of the reflector is required.

Bei Rückleuchten, Blinkleuchten und Rückfahrscheinwerfern von Fahrzeugen ist der Reflektor vielfach einstückiger Teil des Gehäuses. In diesem Fall wird dieses Gehäuse wie der Reflektor in der vorbeschriebenen Weise hergestellt.For rear lights, indicators and reversing lights of vehicles the reflector is often an integral part of the housing. In this case this will be Housing like the reflector made in the manner described above.

Claims (4)

Ansprüche Kunststoff-Reflektor für Leuchten, insbesondere für Leuchten und Scheinwerfer von Kraftfahrzeugen, dadurch gekennzeichnet, daß der Reflektor aus einer Mischung von farblosem, transparentem Polycarbonat (PC) und transparentem, farblosem Polymethyl-Methacrylat (PMMA) hergestellt ist.Claims plastic reflector for lights, in particular for lights and headlights of motor vehicles, characterized in that the reflector made of a mixture of colorless, transparent polycarbonate (PC) and transparent, colorless polymethyl methacrylate (PMMA). 2. Reflektor nach Anspruch 1, dadurch gekennzeichnet, daß die Mischung aus annähernd 50 Gewichtsprozenten Polycarbonat (PC) und annähernd 50 Gewichtsprozenten Polymethyl-Methacrylat (PMMA) besteht.2. Reflector according to claim 1, characterized in that the mixture made of approximately 50 percent by weight polycarbonate (PC) and approximately 50 percent by weight Polymethyl methacrylate (PMMA) is made. 3. Reflektor nach Anspruch 1 , dadurch gekennzeichnet, daß die Mischung zusätzlich Metallpigmente enthält.3. Reflector according to claim 1, characterized in that the mixture additionally contains metal pigments. 4. Reflektor nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß dieser einstückiger Teil eines Gehäuses ist, insbesondere für signalgebende Leuchten und Rückfahrscheinwerfer.4. Reflector according to claim 1, 2 or 3, characterized in that this is an integral part of a housing, in particular for signaling lights and reversing lights.
DE19823230491 1982-08-17 1982-08-17 Plastics reflector for luminaires, especially for luminaires and headlamps of motor vehicles Withdrawn DE3230491A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823230491 DE3230491A1 (en) 1982-08-17 1982-08-17 Plastics reflector for luminaires, especially for luminaires and headlamps of motor vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823230491 DE3230491A1 (en) 1982-08-17 1982-08-17 Plastics reflector for luminaires, especially for luminaires and headlamps of motor vehicles

Publications (1)

Publication Number Publication Date
DE3230491A1 true DE3230491A1 (en) 1984-02-23

Family

ID=6171009

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823230491 Withdrawn DE3230491A1 (en) 1982-08-17 1982-08-17 Plastics reflector for luminaires, especially for luminaires and headlamps of motor vehicles

Country Status (1)

Country Link
DE (1) DE3230491A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263378A2 (en) * 1986-10-06 1988-04-13 General Electric Company Transparent blends of polymethyl methacrylate and BPA polycarbonate
DE3810297A1 (en) * 1988-03-25 1989-10-05 Oka Kano & Oehmichen Kg Forsch Reflector system and luminaire having the reflector system
EP0336244A2 (en) * 1988-04-02 1989-10-11 Licentia Patent-Verwaltungs-GmbH Light fitting with a transparent housing
EP0351793A2 (en) * 1988-07-19 1990-01-24 VALEO VISION S.p.A. A process for the production of a headlamp reflector made of a synthetic thermoplastic polymer, and a headlamp reflector made by such a process
WO2010022812A1 (en) * 2008-08-27 2010-03-04 Linden Gmbh & Co. Kg Polished chrome-type element
WO2016138246A1 (en) * 2015-02-26 2016-09-01 Sabic Global Technologies B.V. Polymer blends comprising polymethyl methacrylate and polycarbonate

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263378A2 (en) * 1986-10-06 1988-04-13 General Electric Company Transparent blends of polymethyl methacrylate and BPA polycarbonate
US4745029A (en) * 1986-10-06 1988-05-17 General Electric Company Transparent blends of polymethyl methacrylate and BPA polycarbonate
EP0263378A3 (en) * 1986-10-06 1988-07-06 General Electric Company Transparent blends of polymethyl methacrylate and bpa polycarbonate
DE3810297A1 (en) * 1988-03-25 1989-10-05 Oka Kano & Oehmichen Kg Forsch Reflector system and luminaire having the reflector system
EP0336244A2 (en) * 1988-04-02 1989-10-11 Licentia Patent-Verwaltungs-GmbH Light fitting with a transparent housing
EP0336244A3 (en) * 1988-04-02 1990-05-02 Licentia Patent-Verwaltungs-Gmbh Light fitting with a transparent housing
EP0351793A2 (en) * 1988-07-19 1990-01-24 VALEO VISION S.p.A. A process for the production of a headlamp reflector made of a synthetic thermoplastic polymer, and a headlamp reflector made by such a process
EP0351793A3 (en) * 1988-07-19 1991-07-17 VALEO VISION S.p.A. A process for the production of a headlamp reflector made of a synthetic thermoplastic polymer, and a headlamp reflector made by such a process
WO2010022812A1 (en) * 2008-08-27 2010-03-04 Linden Gmbh & Co. Kg Polished chrome-type element
WO2016138246A1 (en) * 2015-02-26 2016-09-01 Sabic Global Technologies B.V. Polymer blends comprising polymethyl methacrylate and polycarbonate
KR20170108061A (en) * 2015-02-26 2017-09-26 사빅 글로벌 테크놀러지스 비.브이. Polymer blends comprising polymethyl methacrylate and polycarbonate
CN107250210A (en) * 2015-02-26 2017-10-13 沙特基础工业全球技术公司 Polymer blend including polymethyl methacrylate and makrolon

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Legal Events

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8120 Willingness to grant licences paragraph 23
8139 Disposal/non-payment of the annual fee