EP0182228A1 - Réflecteur réalisé par injections successives de deux matières thermoplastiques - Google Patents

Réflecteur réalisé par injections successives de deux matières thermoplastiques Download PDF

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Publication number
EP0182228A1
EP0182228A1 EP19850114252 EP85114252A EP0182228A1 EP 0182228 A1 EP0182228 A1 EP 0182228A1 EP 19850114252 EP19850114252 EP 19850114252 EP 85114252 A EP85114252 A EP 85114252A EP 0182228 A1 EP0182228 A1 EP 0182228A1
Authority
EP
European Patent Office
Prior art keywords
headlamp
skin
thickness
epi
polyamide
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
EP19850114252
Other languages
German (de)
English (en)
Other versions
EP0182228B1 (fr
Inventor
René Le Creff
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.)
NEIMAN
Original Assignee
Neiman SA
Signal Vision SA
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 Neiman SA, Signal Vision SA filed Critical Neiman SA
Publication of EP0182228A1 publication Critical patent/EP0182228A1/fr
Application granted granted Critical
Publication of EP0182228B1 publication Critical patent/EP0182228B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
    • 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
    • F21V7/28—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by coatings
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/31728—Next to second layer of polyamide

Definitions

  • the invention relates to a headlamp which is produced by successively injection molding two thermoplastics, in particular for automotive headlamps.
  • thermoplastic plastic mirrors instead of the metallic mirrors housed in a support ring.
  • This solution offers numerous advantages over the metallic mirrors used.
  • Thermoplastic mirrors can be molded together with the support ring or housing with relatively little industrial resources. They are lighter, can take different and modified forms and are generally more resistant to atmospheric and chemical influences.
  • the mirror surface must be as fine as possible, the mirror, together with the support, of which it generally forms a part, provides good mechanical strength and above all excellent heat resistance.
  • the temperature that is generated by the incandescent lamps attached to the mirror surface may only cause a slight deformation of the former, which is still compatible with the performance expected from the headlamp. This also means that the thermoplastic material is cheap and easy to process.
  • thermoplastics the first of which is a supporting structure which has the required properties, in particular mechanical and thermal strength, and the second of which forms a skin which is immediate Allows high quality metallization without pre-painting.
  • the aim of the invention is to provide, in the case of a mirror of the latter type, the possibility of obtaining thickness ratios between the skin material and the carrier material, which bring optimum results for the thermoplastics used in practice, both with regard to the mechanical and optical properties and to facilitate production of the mirror.
  • the task of the invention is therefore a headlight which is produced by successively injection molding a polyamide to form a skin and one Polyamides with a mineral and / or organic additive of 50 + 5% to form a supporting structure that surrounds the aforementioned skin, characterized in that when EPI is the interior or useful skin of the headlamp and ES is the thickness of the carrier material, the ratio EPI / ES in the mirror area does not include a local deviation of more than 0.002 / mm.
  • the quality of the headlamp is directly linked to the constancy of the relationship between the thickness of the skin, i.e. H. the thickness to be metallized and the thickness of the supporting structure for this inner skin.
  • the EPI / EPE ratio in the mirror region of the headlight is between 0.8 and 1.2.
  • the ratio of the thickness of the inner layer to that of the outer layer must be as close to 1 as possible so that optimal injection molding conditions are produced.
  • the ratio EPI + EPE / ET in the mirror region of the headlamp must be between 0.1 and 0.3.
  • the sum of the thicknesses of the inner skin and outer skin must be between 1/10 and 3/10 of the total thickness of the headlight in order to obtain the required mechanical properties and to facilitate the double injection molding process.
  • the set of conditions just defined makes it possible to obtain a headlight made of polyamide and charged polyamide with optimal properties and the possibility of mass production.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)
EP19850114252 1984-11-13 1985-11-08 Réflecteur réalisé par injections successives de deux matières thermoplastiques Expired EP0182228B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8417250 1984-11-13
FR8417250A FR2572989B1 (fr) 1984-11-13 1984-11-13 Reflecteur realise par injections consecutives de deux matieres thermoplastiques

Publications (2)

Publication Number Publication Date
EP0182228A1 true EP0182228A1 (fr) 1986-05-28
EP0182228B1 EP0182228B1 (fr) 1989-01-25

Family

ID=9309519

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850114252 Expired EP0182228B1 (fr) 1984-11-13 1985-11-08 Réflecteur réalisé par injections successives de deux matières thermoplastiques

Country Status (6)

Country Link
US (1) US4668542A (fr)
EP (1) EP0182228B1 (fr)
JP (1) JPS61121003A (fr)
DE (1) DE3567952D1 (fr)
ES (1) ES290465Y (fr)
FR (1) FR2572989B1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351793A2 (fr) * 1988-07-19 1990-01-24 VALEO VISION S.p.A. Procédé pour la fabrication de reflecteurs pour phares de voiture en polymère thermoplastique et réflecteur fabriqué par un tel procédé
EP0385824A1 (fr) * 1989-03-03 1990-09-05 Valeo Vision Procédé de fabrication d'un réflecteur en matière synthétique pour dispositif d'éclairage
EP0658422A1 (fr) * 1993-12-14 1995-06-21 Ems-Inventa Ag Article moulé avec surface résistante
WO2011161241A1 (fr) * 2010-06-25 2011-12-29 Dsm Ip Assets B.V. Assemblage de pièces polymères

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8603138A (nl) * 1986-12-10 1988-07-01 Stamicarbon Meerlagen polyamide vormlichaam.
DE4404604A1 (de) * 1994-02-14 1995-08-17 Hella Kg Hueck & Co Verfahren zur Herstellung von Reflektoren aus Kunststoff für Beleuchtungsvorrichtungen
US6395201B1 (en) 2000-02-03 2002-05-28 Visteon Global Technologies, Inc. Method and manufacturing an automotive reflector
DE102016122013A1 (de) * 2016-11-16 2018-05-17 HELLA GmbH & Co. KGaA Reflektorsystem, Verfahren zur Herstellung eines Reflektorsystems und Lichtmodul mit einem solchen Reflektorsystem

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316304A1 (fr) * 1975-07-01 1977-01-28 Valentine Cie Vernis Procede de depot d'une couche reflechissante, notamment sur des reflecteurs de phares

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3723241A (en) * 1970-09-23 1973-03-27 Celanese Corp Bonding of aromatic polyamide film
GB1398076A (en) * 1971-09-24 1975-06-18 Lucas Electrical Co Ltd Headlamp spot lamp or fog lamp reflectors
JPS53119060A (en) * 1977-03-26 1978-10-18 Sumitomo Chemical Co Heat resistent resin reflex mirror
FR2432137A1 (fr) * 1978-07-25 1980-02-22 Seima Procede pour la realisation de reflecteur optique et notamment pour projecteur d'automobile et machine pour sa mise en oeuvre

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316304A1 (fr) * 1975-07-01 1977-01-28 Valentine Cie Vernis Procede de depot d'une couche reflechissante, notamment sur des reflecteurs de phares

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0351793A2 (fr) * 1988-07-19 1990-01-24 VALEO VISION S.p.A. Procédé pour la fabrication de reflecteurs pour phares de voiture en polymère thermoplastique et réflecteur fabriqué par un tel procédé
EP0351793A3 (fr) * 1988-07-19 1991-07-17 VALEO VISION S.p.A. Procédé pour la fabrication de reflecteurs pour phares de voiture en polymère thermoplastique et réflecteur fabriqué par un tel procédé
EP0385824A1 (fr) * 1989-03-03 1990-09-05 Valeo Vision Procédé de fabrication d'un réflecteur en matière synthétique pour dispositif d'éclairage
FR2643849A1 (fr) * 1989-03-03 1990-09-07 Valeo Vision Procede de fabrication d'un reflecteur en matiere synthetique pour dispositif d'eclairage
EP0658422A1 (fr) * 1993-12-14 1995-06-21 Ems-Inventa Ag Article moulé avec surface résistante
WO2011161241A1 (fr) * 2010-06-25 2011-12-29 Dsm Ip Assets B.V. Assemblage de pièces polymères

Also Published As

Publication number Publication date
ES290465U (es) 1986-03-16
EP0182228B1 (fr) 1989-01-25
FR2572989B1 (fr) 1987-01-09
US4668542A (en) 1987-05-26
JPS61121003A (ja) 1986-06-09
FR2572989A1 (fr) 1986-05-16
ES290465Y (es) 1986-10-16
DE3567952D1 (en) 1989-03-02

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