GB2277798A - Vehicle-Light Body - Google Patents

Vehicle-Light Body Download PDF

Info

Publication number
GB2277798A
GB2277798A GB9409024A GB9409024A GB2277798A GB 2277798 A GB2277798 A GB 2277798A GB 9409024 A GB9409024 A GB 9409024A GB 9409024 A GB9409024 A GB 9409024A GB 2277798 A GB2277798 A GB 2277798A
Authority
GB
United Kingdom
Prior art keywords
vehicle
housing
light body
light
fixing means
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.)
Granted
Application number
GB9409024A
Other versions
GB2277798B (en
GB9409024D0 (en
Inventor
Karl Gehbauer
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.)
Roehm GmbH
Roehm GmbH Darmstadt
Original Assignee
Roehm GmbH
Roehm GmbH Darmstadt
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 Roehm GmbH, Roehm GmbH Darmstadt filed Critical Roehm GmbH
Publication of GB9409024D0 publication Critical patent/GB9409024D0/en
Publication of GB2277798A publication Critical patent/GB2277798A/en
Application granted granted Critical
Publication of GB2277798B publication Critical patent/GB2277798B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/27—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/33—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors characterised by their material, surface treatment or coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F21S43/51—Attachment thereof
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2900/00—Features of lamps not covered by other groups in B60Q
    • B60Q2900/20—Arrangements for easy recycling, e.g. for easy dismantling or use of special materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]

Abstract

A vehicle-light body comprising (a) a transparent light cover made of PMMA, (b) a housing made of thermoplastic plastics material, connectable to or integrally formed with the light cover, (c) at least one fixing means connectable to or integrally formed with the housing in order to connect the vehicle-light body to other components, and in which the thermoplastic plastics of the housing is comprised either substantially or wholly of re-processed vehicle rear and indicator lights and the fixing means comprises an ABS-plastics materials.

Description

"Vehicle-liqht body" The invention relates to a vehicle-light body.
More particularly it relates to a vehicle-light body, in particular for rear- and direction-indicator lights, which comprises a) a transparent light cover made of polymethylmethacrylate (PMMA), b) a housing of thermoplastic plastics material, connectable to or integrally formed with the light cover, c) at least one fixing means connectable to or integrally formed with the housing in order to connect the vehicle-light body to other components.
The housing is mainly made of ABS-plastics material. Toughness and elasticity are characteristics required not only because of the mechanical stress to which the housing body itself is subjected but also because they make it possible to fix and connect the housing part with other components, by means of selftapping screws or resilient locking connections.
According to the German Patent Application P 42 44 092, a thermoplastic plastics material which mainly consists of PMMA, ABS- and polycarbonate plastics and has a Vicat softening temperature of at least 102"C, a tensile strength of at least 40 MPa and an elongation at break of at least 2% may be prepared from reprocessed vehicle rear- and direction-indicator lights. This may then be used to produce housing bodies for vehicle lights, therefore closing the cycle re the use of materials in this field.
This thermoplastic plastics material, however, does not meet all the requirements which the fixing means of the housing must fulfil. This is true all the more if the plastics material contains parts which have already been recycled several times. As a result of the renewed thermal stress and increase in the amount of brittle and hard plastics, especially PMMA, the impact resistance decreases with each recycling process.
We have now found a way of enabling the use of thermoplastic plastics prepared from reprocessed vehicle rear- and direction-indicator lights in order to produce vehicle light housings, even when higher requirements with regard to elasticity and toughness have to be met by the fixing means. In our invention, we also delay the gradual deterioration of these characteristics upon renewed re-use of the material.
In our invention, the actual housing and the fixing means therefor are made of different thermoplastic plastics. According to the invention, the thermoplastic material of the housing comprises, either substantially or wholly, reprocessed vehicle rear and indicator lights, and the fixing means comprises an ABS-plastics material. In this way, the fixing means achieves the necessary elasticity and toughness, characteristic properties of the ABS-plastics material. The stability required by the housing body itself is sufficiently provided by the reprocessed plastics material. When reusing the entire light, the ABS part of the material is reduced, on the one hand, by the PMMA part of the transparent light cover and increased again, on the other hand, by the ABS amount of the fixing part so that there is hardly any or even no change in the composition of the reprocessed plastics material.
The invention may be more particularly understood by reference to the accompanying drawings, which are by way of Example only. In the drawings: Figures 1 and 2 describe the invention with reference to an advantageous embodiment of a vehicle rear- or direction-indicator light.
Figure 1 shows an entire vehicle light, in section, including a lamp socket 7 and bulb 8; Figure 2 shows a rear view of the same light.
The transparent light cover 1 is produced by injection moulded transparent PMMA which may be colourless, yellow, red or any other colour. Here, PMMA is understood to be thermoplastic plastics compounds comprising polymethylmethacrylate or copolymers of methylmethacrylate containing 1 to 20 wt.% of ethylenically unsaturated radically polymerisable comonomers, more particularly lower alkyl acrylates.
Their reduced viscosity, measured at 20"C in chloroform, is in the range of 40 to 80 ml/g.
The housing 2, 3 of the vehicle light has the function of a reflector and is therefore in the form of a paraboloid, at least on parts of the inner wall, and is metallised in conventional manner by means of a vapour-deposited aluminium layer. The housing has the purpose of protecting the fitted bulb from damage and of preventing any soiling of the interior of the light.
Except for the opening provided for fitting the bulb, the housing, in combination with the light cover, is therefore completely closed.
In addition to its light and protective function, the light housing has the constructional task of accommodating one or several light sockets 7 and securing them in the necessary position, or enabling the light to be fixed to parts of the automobile body or connected with other parts of the vehicle. The fixing members 4, 5, 6 from the following group serve this purpose: a) collet 4 for the insertion of self-tapping screws, b) helical grooves 5 for the insertion of selftapping screws, c) elastic hooks 6 for producing locking connections.
These fixing members and similar ones may be separately connected with the housing 2. Preferably, several, normally all fixing members 4, 5, 6 are arranged on at least one, preferably a single fixing means 3.
For the purpose of the invention, it suffices if the mechanically stressed fixing members such as collets, helical grooves and locking hooks are made of ABS-plastics material. When several fixing members are combined in a separate fixing means 3 of the housing body, it is economical if the connecting portions between the individual members are also moulded from ABS-plastics material so as to be integral with said fixing members, as shown in Figure 3.
The fixing means 3 may be manufactured separately from ABS-plastics material, using injection moulding.
The materials include impact-resistant thermoplastic plastics based on acrylonitrile, butadiene and styrene which are distinguished by a notch impact strength according to Izod (ISO 180/4a) of at least 18 kJ/m2 as well as by an E-modulus of at least 2,000 MPa (ISO 527) and a melt index at 220 C/98 N (ISO 1133) of at least 1 g/10 min. The Vicat softening temperature of these materials is preferably within the range of 90 to 120 C.
In order to produce the housing 2, one or several prefabricated fixing means 3 may be placed into an injection moulding tool and sprayed with the thermoplastic moulding compound. This ensures a closed permanent connection. The fixing parts, however, may also be connected with a separately prefabricated housing 2 by means of glueing, welding, screwing or locking.
The parts 2 and 3 may, optionally, also be produced in a multi-stage injection moulding process, using various moulding compounds. Here, in the first step, the moulded part is only partly removed from the mould and enclosed in another moulding tool which has an additional cavity in which the part of the housing body which is still missing is produced by injecting the second moulding compound.
According to the invention, the housing 2 which is subjected to little mechanical stress, is produced, either mainly or entirely, from a thermoplastic plastics moulding compound prepared from reprocessed rear- and direction-indicator lights. A typical composition of such a moulding compound is given below: 50-65 wt.% of polymethylmethacrylate or copolymers of methylmethacrylate containing 1 to 20 wt.% of ethylenically unsaturated radically polymerisable monomers, copolymerisable therewith, 25 - 40 wt.% of impact-resistant plastics materials based on acrylonitrile, butadiene and styrene, 1 - 20 wt.% of polycarbonate plastics material As a result of the way they are produced, these moulding compounds normally contain parts which are nonmeltable up to 250"C but of a size of less than 0.2 mm, preferably less than 0.04 mm (mesh width).These parts originate from dragged-in pigments and impurities or are constituents of the reprocessed vehicle lights consisting of other materials such as glass, metal, rubber, duroplastics etc. Larger particles and such non-meltable particles may be removed from the moulding compound by fusion filtration. The remaining fine particles do not generally interfere with the injection moulding and make it possible to produce a shiny, metallised surface. For economic manufacture and assembly, the individual parts of the vehicle-light body of the invention are, preferably, integrally connected with one another. In the same way as the fixing means 3 of the housing, the light cover 1 may also be prefabricated and placed into the injection moulding tool which forms the housing 2, and be made into an integral light body by injecting the thermoplastic moulding compound. As already described above with reference to the connection between the housing part 2 and fixing means 3, the light cover may also be connected by glueing, welding or screwing. Irrespective of the type of connection, the entire light may, when necessary, be recycled without having to be disassembled beforehand.

Claims (6)

Claims
1. A vehicle-light body comprising (a) a transparent light cover made of PMMA, (b) a housing made of thermoplastic plastics material, connectable to or integrally formed with the light cover, (c) at least one fixing means connectable to or integrally formed with the housing in order to connect the vehicle-light body to other components, and in which the thermoplastic plastics of the housing is comprised either substantially or wholly of re-processed vehicle rear and indicator lights and the fixing means comprises an ABS-plastics materials.
2. A vehicle-light body as claimed in claim 1 in which the thermoplastic plastics material of the housing has the composition: 50-65 wt.% of polymethylmethacrylate or copolymers of methylmethacrylate containing 1 to 20 wt.% of ethylenically unsaturated radically polymerisable monomers, copolymerisable therewith, 25 - 40 wt.% of impact-resistant plastics materials based on acrylonitrile, butadiene and styrene, and 1 - 20 wt.% of polycarbonate plastics materials, and having a Vicat softening temperature of at least 102"C, a tensile strength of at least 40 MPa and an elongation at break of at least 2%.
3. A vehicle-light body as claimed in claim 1 or claim 2 in which the fixing means comprises at least one fixing member from the group of: (a) collets for the insertion of self-tapping screws, (b) helical grooves for the insertion of self-tapping screws, (c) resilient hooks for producing locking connections.
4. A vehicle-light body as claimed in claim 3 in which several fixing members are arranged on a fixing part.
5. A vehicle-light body as claimed in claim 1 substantially as hereinbefore described.
6. A vehicle-light body as claimed in claim 1 substantially as hereinbefore described and with reference to the accompanying drawings.
GB9409024A 1993-05-06 1994-04-28 Vehicle-light body Expired - Fee Related GB2277798B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE9306860U DE9306860U1 (en) 1993-05-06 1993-05-06

Publications (3)

Publication Number Publication Date
GB9409024D0 GB9409024D0 (en) 1994-06-22
GB2277798A true GB2277798A (en) 1994-11-09
GB2277798B GB2277798B (en) 1996-10-02

Family

ID=6892929

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9409024A Expired - Fee Related GB2277798B (en) 1993-05-06 1994-04-28 Vehicle-light body

Country Status (4)

Country Link
DE (2) DE9306860U1 (en)
FR (1) FR2704936B1 (en)
GB (1) GB2277798B (en)
IT (1) IT1273182B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741033A1 (en) * 1995-11-09 1997-05-16 Sagem DASHBOARD COMPRISING A WINDOW CLIPSED ON THE UPHOLSTERY

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29706976U1 (en) * 1997-04-18 1997-05-28 Hella Kg Hueck & Co Light for vehicles
DE19813596B4 (en) * 1998-03-27 2007-06-28 Volkswagen Ag Fastening device for a vehicle part
DE10255405B4 (en) * 2002-11-28 2005-04-14 Hella Kgaa Hueck & Co. Lighting element for vehicles and method of assembly
WO2010137034A1 (en) * 2009-05-25 2010-12-02 Tvs Motor Company Limited Turn signal lamp mounting for a motorcycle
CN108826214B (en) * 2018-07-25 2024-05-03 华域视觉科技(上海)有限公司 Novel front car lamp free of coating and preparation method of lens thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4845597A (en) * 1986-12-11 1989-07-04 Mccaghren Joel L Quick release light fixture
DE4013700A1 (en) * 1990-04-28 1991-10-31 Roehm Gmbh THERMOPLASTICALLY PROCESSABLE POLYMER MIXTURES BASED ON POLYMETHACRYLATE WITH ABS AND POLYCARBONATE MIXTURES
US5142454A (en) * 1991-11-18 1992-08-25 Ford Motor Company Vehicle lamp assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2741033A1 (en) * 1995-11-09 1997-05-16 Sagem DASHBOARD COMPRISING A WINDOW CLIPSED ON THE UPHOLSTERY

Also Published As

Publication number Publication date
DE9306860U1 (en) 1993-07-15
GB2277798B (en) 1996-10-02
ITTO940364A1 (en) 1995-11-05
DE4412641A1 (en) 1994-11-10
IT1273182B (en) 1997-07-07
GB9409024D0 (en) 1994-06-22
FR2704936B1 (en) 1997-06-06
FR2704936A1 (en) 1994-11-10
ITTO940364A0 (en) 1994-05-05

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070506