FR2967372A1 - METHOD FOR MANUFACTURING A REFLECTIVE MIRROR - Google Patents

METHOD FOR MANUFACTURING A REFLECTIVE MIRROR Download PDF

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Publication number
FR2967372A1
FR2967372A1 FR1160303A FR1160303A FR2967372A1 FR 2967372 A1 FR2967372 A1 FR 2967372A1 FR 1160303 A FR1160303 A FR 1160303A FR 1160303 A FR1160303 A FR 1160303A FR 2967372 A1 FR2967372 A1 FR 2967372A1
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France
Prior art keywords
mold
coating material
injection mold
base body
coating
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
FR1160303A
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French (fr)
Inventor
Stephan Geise
Carsten Weiss
Stefan Apelt
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Robert Bosch GmbH
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Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of FR2967372A1 publication Critical patent/FR2967372A1/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
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • 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
    • B29C37/00Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C37/0032In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat
    • 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
    • B29C41/00Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/003Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor characterised by the choice of material
    • 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
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/14Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being a lining
    • 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
    • B29C69/00Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B29C69/02Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore of moulding techniques only
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/08Mirrors
    • G02B5/0808Mirrors having a single reflecting layer
    • 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
    • B29C37/00Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B29C2037/0035In-mould coating, e.g. by introducing the coating material into the mould after forming the article the coating being applied as liquid, gel, paste or the like
    • 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
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14778Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/003Reflective
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00Layered products
    • B29L2009/005Layered products coated
    • B29L2009/006Layered products coated painted
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00Optical elements, e.g. lenses, prisms
    • B29L2011/0058Mirrors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00Optical elements, e.g. lenses, prisms
    • B29L2011/0083Reflectors

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

Procédé de fabrication d'un dispositif (6) réfléchissant la lumière ayant au moins un corps de base (4) muni d'une couche de matière de revêtement (3) réfléchissant la lumière. La matière de revêtement (3) est appliquée au moins sur la surface (2) d'un moule et ensuite on applique le corps de base (4) sur la matière de revêtement (3). Le dispositif (6) réfléchissant la lumière est composé d'un corps de base (4) en une matière chargée et/ou une matière expansée.A method of manufacturing a light-reflecting device (6) having at least one base body (4) provided with a layer of light reflecting coating material (3). The coating material (3) is applied at least on the surface (2) of a mold and then the base body (4) is applied to the coating material (3). The light reflecting device (6) is composed of a base body (4) of a filled material and / or an expanded material.

Description

i Domaine de l'invention La présente invention se rapporte à un procédé de fabrication d'un dispositif réfléchissant la lumière selon lequel on applique un revêtement de matière réfléchissant la lumière sur un corps de base. s L'invention se rapporte également à un dispositif de ré-flexion de la lumière composé d'au moins un corps de base, muni d'un revêtement en un matériau réfléchissant la lumière. Etat de la technique Les miroirs réfléchissant en matière plastique se fabriquent io selon un procédé par plusieurs étapes successives. Tout d'abord, par un procédé d'injection ou d'impression, on forme traditionnellement un corps de base dans une machine d'injection. Ce corps de base encore appelé ébauche, est muni d'un revêtement sous la forme d'une couche réfléchissante au cours de l'étape suivante dans une installation de revêtement, ls distincte. L'étape de procédé s'exécute notamment pour de petites séries dans des installations de revêtement, centrales. L'inconvénient de ce pro-cédé connu est que la séparation spatiale entre les deux étapes de procédé nécessite une opération de nettoyage distincte, intermédiaire pour enlever les éventuelles impuretés accrochées à l'ébauche pour éviter les défauts de 20 surface. Le document EP-A-O 123 374 décrit un procédé dit de « revêtement dans le moule (procédé IMC) selon lequel on muni d'un mince revêtement des « composés moulés en feuilles « (SMC) à des fins décoratives. Ainsi, après prise de la matière thermodurcissable, on ouvre une 25 moitié du moule et on introduit une quantité appropriée de verni dans la qualité du moule. Puis on referme le moule et le verni se répartit à la sur-face à revêtir et il durcit. Le document DE-A-10 2005 061 451 décrit un autre procédé de revêtement utilisé notamment pour fabriquer des couches de déco- 30 ration. Selon ce procédé, on introduit la couche de verni dans l'outil ouvert et en parallèle, dans un autre outil, on place un support de matière plastique. Entre le support et la couche de verni, il subsiste une cavité dans laquelle on injecte la couche de décoration en couleur à l'aide d'une machine d'injection. FIELD OF THE INVENTION The present invention relates to a method of manufacturing a light reflecting device according to which a coating of light reflecting material is applied to a base body. The invention also relates to a light reflecting device composed of at least one base body, provided with a coating of a light reflective material. STATE OF THE ART Reflective mirrors made of plastic are produced in a process by several successive steps. First, by an injection or printing process, a base body is traditionally formed in an injection machine. This basic body, also called a blank, is provided with a coating in the form of a reflective layer during the next step in a separate ls. The process step is carried out especially for small series in central coating plants. The disadvantage of this known process is that the spatial separation between the two process steps requires a separate, intermediate cleaning operation to remove any impurities attached to the blank to avoid surface defects. EP-A-0 123 374 discloses a so-called "in-mold coating" process (IMC process) in which a thin coating of "sheet molded compounds" (SMC) is provided for decorative purposes. Thus, after setting the thermosetting material, half of the mold is opened and a suitable amount of varnish is introduced into the mold quality. Then we close the mold and the varnish is distributed on the surface to be coated and it hardens. DE-A-10 2005 061 451 discloses another coating method used in particular for producing decorative layers. According to this method, the varnish layer is introduced into the open tool and in parallel, in another tool, a plastic support is placed. Between the support and the layer of varnish, there remains a cavity in which the decorative layer is injected in color using an injection machine.

2 But de l'invention La présente invention a pour but de développer un procédé permettant de fabriquer des miroirs réfléchissants par une opération sans avoir à effectuer de revêtement ultérieur ou de travail ultérieur. OBJECT OF THE INVENTION The object of the present invention is to develop a method for making reflective mirrors by one operation without having to perform subsequent coating or subsequent work.

Exposé et avantages de l'invention A cet effet, l'invention concerne un procédé de type défini ci-dessus caractérisé en ce qu'on applique la matière de revêtement au moins sur la surface d'un moule et ensuite on applique le corps de base sur la matière de revêtement. io Le revêtement est formé avantageusement pendant le rem-plissage du moule dans le moule sur le corps de base. Pour cela, avant de remplir le moule avec le matériau du corps de base, on applique le matériau de revêtement sur la surface du moule. On évite ainsi tout revêtement postérieur y compris les étapes intermédiaires nécessaires. En outre, le 15 procédé selon l'invention permet d'utiliser un grand nombre de matériaux tels que par exemple, les matières plastiques remplies ou expansées et qui, du fait des défauts superficiels de surface, ne peuvent être revêtues par des procédés de revêtements usuels. En outre, l'intégration de la mise en forme et du revêtement, réduit considérablement le coût du travail et 20 les investissements. Selon développement particulièrement avantageux du pro-cédé de l'invention, le moule d'un outil d'injection-coulé et le matériau de revêtement sont appliqués sur au moins une surface d'au moins une cavité du moule d'injection, le moule étant l'outil d'injection et le corps de base 25 est formé à partir d'un matériau susceptible d'être injecté, ce matériau étant injecté dans au moins une cavité de l'outil d'injection. Des dispositifs réfléchissants peuvent également être réalisés par injection ou par impression selon procédé et le revêtement réfléchissant est mis en forme pendant le remplissage du moule. Avant le remplissage du moule avec le 30 matériau de support, on applique la couche réfléchissante sur la surface d'une moitié de moule. La technique d'injection permet notamment une fabrication efficace et économique en grande série de miroirs réfléchissants en matière plastique. Selon un autre développement avantageux du procédé de 35 l'invention, on applique tout d'abord le matériau de revêtement sur au DESCRIPTION AND ADVANTAGES OF THE INVENTION For this purpose, the invention relates to a method of the type defined above, characterized in that the coating material is applied at least on the surface of a mold and then the body of the mold is applied. based on the coating material. The coating is advantageously formed during the remelting of the mold in the mold on the base body. For this, before filling the mold with the material of the base body, the coating material is applied to the surface of the mold. This avoids any posterior coating including the necessary intermediate steps. In addition, the process according to the invention makes it possible to use a large number of materials such as, for example, filled or expanded plastics which, because of surface surface defects, can not be coated by coating processes. conventional. In addition, the integration of shaping and coating greatly reduces the cost of labor and investment. According to a particularly advantageous development of the process of the invention, the mold of an injection-cast tool and the coating material are applied to at least one surface of at least one cavity of the injection mold, the mold being the injection tool and the base body 25 is formed from a material capable of being injected, this material being injected into at least one cavity of the injection tool. Reflective devices may also be made by injection or process printing and the reflective coating is shaped during mold filling. Prior to filling the mold with the support material, the reflective layer is applied to the surface of a mold half. The injection technique allows in particular an efficient and economical manufacturing in large series of reflecting mirrors made of plastic material. According to another advantageous development of the process of the invention, the coating material is first applied to

3 moins une surface d'au moins une cavité d'un moule d'injection, ouvert, on interrompt alors le procédé jusqu'à ce que la matière de revêtement soit au moins ou partie durcie puis on referme le moule d'injection et on injecte la matière d'injection dans au moins une cavité restante du moule d'injection et ensuite on démoule le dispositif terminé. Un tel procédé de fabrication est rapide, efficace et permet une fabrication économique de dispositifs réfléchissants en particulier de miroirs réfléchissants. Suivant un développement avantageux du procédé de l'invention, la matière de revêtement est tout d'abord appliquée sur au io moins une surface d'au moins une cavité du moule d'injection ouvert puis on interrompt le procédé jusqu'à ce que la matière de revêtement soit au moins en partie durcie, ensuite on ferme le moule partiellement puis on injecte la matière d'injection dans au moins une cavité restante du moule d'injection puis on ferme complètement le moule d'injection et ensuite on 15 démoule le dispositif terminé. Selon un développement particulièrement avantageux du procédé, la matière d'injection est une matière thermoplastique ou thermodurcissable, chargée en particulier du polycarbonate (PC), du polybutylène téréphtalate (PBT), du polyphénylène sulfure (PPS), un polymère de 20 crystal liquide (LCP), ou un composé de moulage en vrac (BMC) et/ou un matériau expansé physiquement ou chimiquement par exemple du polycarbonate (PC) ou polybutylène téréphtalate (PBT). Selon un autre développement avantageux du procédé de l'invention, le matériau de revêtement est un verni miroir de préférence, le 25 verni miroir 2K-PUR. Le problème de l'invention est également résolu par un dis-positif dont le corps de base est composé au moins en partie d'un matériau chargé et/ou d'un matériau expansé. Selon un développement avantageux du dispositif de 30 l'invention, le matériau chargé est une matière thermoplastique ou thermodurcissable, chargée par exemple du polycarbonate (PC), du polybutylène téréphtalate (PBT), du polyphénylène sulfure (PPS), un polymère de crystal liquide (LCP), ou un composé de moulage en vrac (BMC) et/ou un matériau expansé physiquement ou chimiquement par exemple du poly- 35 carbonate (PC) ou polybutylène téréphtalate (PBT). 3 minus one surface of at least one cavity of an injection mold, open, then the process is interrupted until the coating material is at least partially cured and then the injection mold is closed and injecting the injection material into at least one remaining cavity of the injection mold and then demolding the finished device. Such a manufacturing process is fast, efficient and allows economical manufacture of reflective devices, in particular reflecting mirrors. According to an advantageous development of the process of the invention, the coating material is first applied to at least one surface of at least one cavity of the open injection mold and the process is then interrupted until the the coating material is at least partially cured, then the mold is partially closed, the injection material is then injected into at least one remaining cavity of the injection mold, and the injection mold is completely closed and then demolded. device completed. According to a particularly advantageous development of the process, the injection material is a thermoplastic or thermosetting material, loaded in particular with polycarbonate (PC), polybutylene terephthalate (PBT), polyphenylene sulphide (PPS), a liquid crystal polymer ( LCP), or a bulk molding compound (BMC) and / or a physically or chemically foamed material for example polycarbonate (PC) or polybutylene terephthalate (PBT). According to another advantageous development of the process of the invention, the coating material is preferably a mirror varnish, the 2K-PUR mirror varnish. The problem of the invention is also solved by a dis-positive whose base body is composed at least in part of a loaded material and / or an expanded material. According to an advantageous development of the device of the invention, the filled material is a thermoplastic or thermosetting material, loaded for example with polycarbonate (PC), polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), a liquid crystal polymer (LCP), or a bulk molding compound (BMC) and / or a physically or chemically foamed material for example polycarbonate (PC) or polybutylene terephthalate (PBT).

4 Selon un autre développement avantageux du dispositif de l'invention, la matière expansée est une matière expansée physiquement ou chimiquement en particulier du polycarbonate (PC) ou du polybutylenterephthalat (PBT). According to another advantageous development of the device of the invention, the expanded material is a physically or chemically expanded material, in particular polycarbonate (PC) or polybutylenterephthalate (PBT).

Dessins La présente invention sera décrite ci-après de manière plus détaillée à l'aide d'un procédé de fabrication d'un dispositif réfléchissant la lumière et d'un exemple de dispositif obtenu, représenté schématiquement dans les dessins annexés dans lesquels : io la figure 1 est une section schématique d'un exemple de moule pour la mise en oeuvre du procédé de l'invention, la figure 2 est une section schématique du moule de la figure 1 en position fermée, la figure 3 est une section schématique du moule de la figure 1 avec 15 démoulage du dispositif selon l'invention. Description de modes de réalisation de l'invention La figure 1 montre un moule 1 ouvert de préférence un moule d'injection dont la surface d'intérieur 2 est munie d'un matériau de revêtement 3, de préférence une couche de verni réfléchissante. Le maté- 20 riau de revêtement 3 a tout d'abord été appliqué sous la forme d'une couche mince sur la surface intérieure 2 du moule 1, ouvert ; cette matière est de préférence une couche de verni miroir. Après un bref temps de durcissement de la matière de revêtement 3, on ferme complètement le moule 1 et ensuite on injecte la matière constituant le corps de base 4 25 dans la cavité 5 qui reste derrière la matière de revêtement 3. L'injection se fait de préférence par la buse d'une machine d'injection (figure 2). En-suite, on ouvre de nouveau le moule 1 et on démoule le dispositif 6 terminé (figure 3). Le dispositif 6 selon l'invention se compose d'un corps de base 4 d'une matière de revêtement 3. Le corps de base 4 se compose de 30 préférence d'une matière thermoplastique ou thermodurcissable, chargée, de préférence du polycarbonate (PC), du polybutylène téréphtalate (PBT), polyphénylène sulfure (PPS), un polymère de crystal liquide (LCP), ou un composé de moulage en vrac (BMC) et/ou un matériau expansé physiquement ou chimiquement tel que par exemple du polycarbonate (PC) ou 2967372 s polybutylène téréphtalate (PBT). La matière de revêtement 3 est de préférence un verni miroir en particulier le verni miroir 2K-PUR. Selon, une variante de réalisation du procédé de l'invention, la matière qui constitue le corps de base 4 peut être injectée dans le moule s 1 seulement partiellement fermé après application de la matière de revêtement 3. Ensuite, on ferme complètement le moule 1 de sorte que la matière du corps de base remplit alors la cavité restante 5. Le dispositif 6 selon l'invention peut s'appliquer à tous les systèmes dans lesquels on veut dévier des faisceaux lumineux par des miroirs, c'est-à-dire, par exemple, les projecteurs à réflecteur ou les dispositifs d'affichage tête haute. 15 Drawings The present invention will be described below in more detail using a method of manufacturing a light reflecting device and an exemplary device obtained, shown schematically in the accompanying drawings in which: FIG. 1 is a schematic section of an example of a mold for implementing the method of the invention, FIG. 2 is a schematic section of the mold of FIG. 1 in the closed position, FIG. 3 is a schematic section of the mold. of Figure 1 with demolding of the device according to the invention. DESCRIPTION OF EMBODIMENTS OF THE INVENTION FIG. 1 shows an open mold 1, preferably an injection mold whose inner surface 2 is provided with a coating material 3, preferably a layer of reflective varnish. The coating material 3 was first applied in the form of a thin layer on the inner surface 2 of the open mold 1; this material is preferably a layer of mirror varnish. After a short curing time of the coating material 3, the mold 1 is completely closed and then the material constituting the base body 4 is injected into the cavity 5 which remains behind the coating material 3. The injection is made preferably by the nozzle of an injection machine (Figure 2). Then, the mold 1 is opened again and the finished device 6 is demolded (FIG. 3). The device 6 according to the invention consists of a base body 4 of a coating material 3. The base body 4 is preferably composed of a thermoplastic or thermosetting material, preferably filled with polycarbonate (PC polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), a liquid crystal polymer (LCP), or a bulk molding compound (BMC) and / or a physically or chemically expanded material such as for example polycarbonate ( PC) or 2967372 s polybutylene terephthalate (PBT). The coating material 3 is preferably a mirror varnish, in particular the 2K-PUR mirror varnish. According to an alternative embodiment of the process of the invention, the material which constitutes the basic body 4 can be injected into the mold only partially closed after application of the coating material 3. Then, the mold 1 is closed completely. so that the material of the basic body then fills the remaining cavity 5. The device 6 according to the invention can be applied to all systems in which it is desired to deflect light beams by mirrors, that is to say for example, reflector projectors or head-up display devices. 15

Claims (1)

REVENDICATIONS1» Procédé de fabrication d'un dispositif réfléchissant la lumière selon le-quel on applique un revêtement de matière réfléchissant la lumière sur un corps de base, s procédé caractérisé en ce qu' on applique la matière de revêtement (3) au moins sur la surface (2) d'un moule (1) et ensuite on applique le corps de base (4) sur la matière de revêtement (3). 10 2» Procédé selon la revendication 1, caractérisé en ce que le moule (1) est un moule d'injection et la matière de revêtement (3) est appliquée sur au moins une surface (2) d'au moins une cavité (5) du moule d'injection. 15 3» Procédé selon la revendication 1, caractérisé en ce que le moule (1) est un outil d'injection et le corps de base (4) est en une matière susceptible d'être injectée au moins dans une cavité (5) du moule 20 d'injection. 4» Procédé selon la revendication 2 ou la revendication 3, caractérisés par les étapes suivantes : a. appliquer une matière de revêtement (3) sur au moins une surface (2) 25 d'une cavité (5) d'un moule d'injection ouvert, b. interrompre le procédé jusqu'à ce que la matière de revêtement soit au moins en partie durcie, c. fermer de l'outil d'injection, d. injecter la matière susceptible d'être injectée dans au moins une cavité 30 résiduelle (5) du moule d'injection, e. démouler le dispositif terminé (6). 5» Procédé selon les revendications 2 et 3, caractérisé par les étapes suivantes : 2967372 s a. appliquer la matière de revêtement (3) sur au moins une surface (2) d'au moins une cavité (5) du moule d'injection ouvert, b. interrompre le procédé jusqu'à ce que la matière de revêtement soit au moins en partie durcie, c. fermer en partie le moule d'injection, d. injecter la matière susceptible d'être injectée dans au moins une cavité résiduelle (5) du moule d'injection, e. fermer complètement l'outil d'injection, f. démouler le dispositif terminé (6). io 6» Procédé selon la revendication 3, caractérisé en ce que la matière susceptible d'être injectée est une matière thermoplastique ou thermodurcissable chargée de préférence du polycarbonate (PC), du poly- 15 butylène téréphtalate (PBT), du polyphénylène sulfure (PPS), un polymère de crystal liquide (LCP), ou un composé de moulage en vrac (BMC) et/ou un matériau expansé physiquement ou chimiquement par exemple du polycarbonate (PC) ou polybutylène téréphtalate (PBT). 20 7» Procédé selon la revendication 1, caractérisé en ce que la matière de revêtement (3) est un verni miroir de préférence un verni miroir 2K-PUR. 25 8» Dispositif (6) réfléchissant la lumière composé au moins d'un corps de base muni d'une matière de revêtement réfléchissant la lumière, dispositif caractérisé en ce que le corps de base (4) est formé au moins en partie d'une matière chargée et/ou d'une matière expansée. 30 9» Dispositif selon la revendication 8, caractérisé en ce que la matière chargée est une matière thermoplastique ou thermodurcissable chargée de préférence du polycarbonate (PC), du polybutylène téréphtalate9 (PBT), du polyphénylène sulfure (PPS), un polymère de cristal liquide (LCP), ou un composé de moulage en vrac (BMC). 10» Dispositif selon la revendication 8 ou la revendication 9, s caractérisé en ce que la matière plastique expansée est une matière expansée physiquement ou chimiquement de préférence du polycarbonate (PC) ou du polybutylène téréphtalate (PBT). io 15 CLAIMS1 »A method of manufacturing a light reflecting device according to which a coating of light reflective material is applied to a base body, characterized in that the coating material (3) is applied at least on the surface (2) of a mold (1) and then applying the base body (4) to the coating material (3). The method of claim 1, characterized in that the mold (1) is an injection mold and the coating material (3) is applied to at least one surface (2) of at least one cavity (5). ) of the injection mold. 3. The process as claimed in claim 1, characterized in that the mold (1) is an injection tool and the base body (4) is made of a material that can be injected into at least one cavity (5) of the injection mold 20. 4 »Process according to claim 2 or claim 3, characterized by the following steps: a. applying a coating material (3) to at least one surface (2) of a cavity (5) of an open injection mold, b. stopping the process until the coating material is at least partially cured, c. close the injection tool, d. injecting the material that can be injected into at least one residual cavity (5) of the injection mold, e. demolding the finished device (6). 5 »Process according to claims 2 and 3, characterized by the following steps: 2967372 s a. applying the coating material (3) to at least one surface (2) of at least one cavity (5) of the open injection mold, b. stopping the process until the coating material is at least partially cured, c. partially close the injection mold, d. injecting the material that can be injected into at least one residual cavity (5) of the injection mold, e. completely close the injection tool, f. demolding the finished device (6). 6 »Process according to claim 3, characterized in that the injectable material is a thermoplastic or thermosetting material preferably filled with polycarbonate (PC), polybutylene terephthalate (PBT), polyphenylene sulfide (PPS) ), a liquid crystal polymer (LCP), or a bulk molding compound (BMC) and / or a physically or chemically foamed material for example polycarbonate (PC) or polybutylene terephthalate (PBT). 7. Process according to claim 1, characterized in that the coating material (3) is a mirror varnish, preferably a 2K-PUR mirror varnish. 8. A light-reflecting device (6) composed of at least one base body provided with a light reflecting coating material, characterized in that the base body (4) is formed at least in part of a charged material and / or an expanded material. 9. The device according to claim 8, characterized in that the filled material is a thermoplastic or thermosetting material preferably filled with polycarbonate (PC), polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), a liquid crystal polymer. (LCP), or a bulk molding compound (BMC). 10 "Device according to claim 8 or claim 9, s characterized in that the foamed plastic material is a physically or chemically expanded material preferably polycarbonate (PC) or polybutylene terephthalate (PBT). io 15
FR1160303A 2010-11-16 2011-11-14 METHOD FOR MANUFACTURING A REFLECTIVE MIRROR Pending FR2967372A1 (en)

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DE102017217775A1 (en) 2017-10-06 2019-04-11 Robert Bosch Gmbh Shaped body with at least one main body
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