JP3488079B2 - Vehicle lamp and method of manufacturing the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lamp in which a reflective film having an undercoat layer having a specific composition and a silver plating layer is provided in a predetermined portion of a lamp housing. The present invention also relates to a vehicle lamp including a lens and a lamp housing that are integrally formed by a die slide injection molding method, and a manufacturing method thereof. By providing a reflective film having the above-mentioned specific structure on the outer surface of the lamp housing of the vehicle lamp in which the lens and the lamp housing are integrally formed, water, dust, etc. can be prevented from entering the lamp. It is possible to provide a vehicle lamp that is surely prevented and is excellent in light collection performance and reflection performance.

[0002]

2. Description of the Related Art Conventionally, an aluminum foil has been adhered or aluminum has been vapor-deposited on the inner surface of a lamp housing of a vehicle lamp to form a coating for light collection and reflection. These aluminum foils or vapor-deposited coatings have the required reflection performance and the like and are used without any particular problems. However, the light-collecting and reflecting properties are not always sufficient, and it is conceivable to use a silver film as a reflective film having more excellent performance. In particular, it can be formed by simple operations and processes, and has excellent durability,
A vehicle lamp provided with a reflective film having a beautiful appearance is desired.

As a method for forming a silver film, there are an electroplating method, a vacuum vapor deposition method, a hot stamping method and the like, but all of them require a specific apparatus and the operation is considerably complicated. Further, in the chemical plating method utilizing the silver mirror reaction, a film can be formed by a simple device, but the operation and process are complicated. In particular, in order to obtain a silver-plated layer having excellent light-collecting and reflecting properties, many processing steps are required, and those steps must be highly controlled. In the conventional chemical plating method, the adhesion between the undercoat layer and the silver plating layer is not sufficient, and it is necessary to improve the physical properties such as durability.

Conventionally, a vehicular lamp is constructed by combining a lens 1 and a lamp housing 2 which are molded separately as shown in FIG. In these, for example, a concave portion provided on the front opening peripheral edge of the lamp housing and a convex portion provided on the inner peripheral edge of the lens are fitted to each other, and the fitting portion 5 is filled with the hot melt adhesive 6 or the like. They are integrally formed by joining and sealing. The light source bulb 8 used in this vehicle lamp generates a considerable amount of heat when it is turned on. Therefore, the resin forming the lens and the lamp housing needs a suitable heat resistance, and a resin that can withstand a temperature of about 80 to 130 ° C. for a considerable time is usually used.

As a resin that can withstand the heat generated by the light source bulb, polypropylene or the like containing an inorganic filler such as talc has been conventionally used as a resin forming a lamp housing. Further, as the resin constituting the lens, polycarbonate or acrylic resin is used because excellent transparency is required in addition to heat resistance. And
A reflective film made of aluminum is usually provided on the inner surface of the lamp housing. This reflective film is formed by a conventional method such as a coating method, a vacuum deposition method, a hot stamping method or the like.

However, in the conventional vehicle lamp in which the lens and the required portion of the lamp housing are fitted, filled with an adhesive or the like, joined, and sealed, the fitting portion cannot be reliably sealed for a long period of time. It's not easy. In addition, deterioration of the adhesive and the like with time is unavoidable, and water, dust, and the like may enter the lamp. Further, in the conventional vehicle lamp, since the lamp housing is opaque, the reflective film is necessarily formed on the inner surface of the lamp housing. But,
In the recess of the inner surface of this lamp housing, paint, vapor deposition, etc.
It is not easy to form a required reflective film having a uniform thickness by the conventional method. Also, with a predetermined film thickness,
It is not easy to adjust the reflectance and to form a reflective film with less variation in the reflectance.

[0007]

DISCLOSURE OF THE INVENTION The present invention is to solve the above-mentioned conventional problems, and is provided with a reflection film having a silver plating layer, has sufficient adhesion and durability, etc. An object of the present invention is to provide a vehicle lamp having excellent light performance and reflection performance. Another object of the present invention is to provide a vehicular lamp that is excellent in the integrity of the lens and the lamp housing, and at least prevents water, dust, and the like from entering from a portion where these are joined together, and a method for manufacturing the same. . Furthermore,
In the present invention, by making the lamp housing colored or colorless and transparent, a reflective film can be provided on the outer surface of the lamp housing, and a vehicle lamp provided with a reflective film having excellent light collecting and reflecting performance. Can be easily obtained. In particular, by utilizing a specific silver mirror reaction, a reflective film having a uniform thickness can be efficiently formed in a short time.

[0008]

A vehicle lamp according to a first aspect of the present invention is a vehicle lamp having a lens and a lamp housing, and a reflective film is provided at a required portion of the lamp housing. An undercoat layer formed on the inner surface or the outer surface of the lamp housing, and a silver plating layer formed on the surface of the undercoat layer,
The undercoat layer is formed by drying an undercoat agent made of a coating material containing an alkoxytitanium ester and at least one of a silane coupling agent having an epoxy group and an epoxy resin. And

The "vehicle lamp" may be one in which the lens and the lamp housing are separated from each other as in the conventional case, but in the vehicle lamp in which these are integrally formed, dust, water, etc. are introduced into the lamp. This is preferable because it can be surely prevented from entering. In a vehicle lamp, the lamp housing is usually provided with a reflective film for collecting and reflecting light. When the lamp housing is opaque, this reflective film must be provided on the inner surface. Further, if the lamp housing is transparent, it can be provided on either the outer surface or the inner surface. However, the formation of the reflection film on the outer surface of the lamp housing is much easier to work and the productivity is improved as compared with the case where the reflection film is provided on the inner surface. Further, the thickness of the reflective film can be made more uniform, and the reflectance can be easily adjusted. Furthermore, even if there are variations in film thickness, the reflection performance is not affected at all. Therefore, it is preferable that not only the lens but also the lamp housing is a transparent vehicle lamp.

In the first invention, the "reflection film" includes the "silver plating layer" formed by using a solution containing silver. According to the chemical plating method using this silver mirror reaction,
It is possible to form a silver plating layer having excellent light-collecting performance and reflecting performance in a short time. In forming the silver-plated layer, first, the above-mentioned "paint" which is the main component of the undercoating agent for forming the undercoating layer is selected. As the paint, various synthetic resin paints and cellulosic paints can be used. As the synthetic resin coating material, coating materials containing alkyd resin, phenol resin, aminoalkyd resin, epoxy resin, acrylic resin, urethane resin, silicone resin and the like can be used.

As this paint, a paint containing an alkyd resin, a silicone resin or the like, which can be dried at room temperature, is particularly preferable. These paints have a tough film after drying, and can form a silver-plated layer having excellent adhesion to the silver-plated layer and an excellent appearance. This synthetic resin paint is prepared and stored in an appropriate composition in consideration of the effect of the gloss of the silver plating layer on the performance of the reflective film. When the adhesion of the synthetic resin paint to the lamp housing is insufficient, a transparent primer may be applied to the predetermined surface of the lamp housing and dried to form the primer layer.

Further, the above-mentioned "alkoxytitanium ester" is blended in the paint. As this alkoxy titanium ester, butyl titanate dimer (DB
T), tetra-n-butoxytitanium (TBT) and its polymers, tetraisopropoxytitanium, tetrastearyloxytitanium, and various other materials can be used. This alkoxy titanium ester is the second
As in the invention, polymers of DBT and TBT and the like are preferable because they have a slow hydrolysis rate and are stable. Especially DBT
Is very convenient in terms of work since the catalyst function is not lost even after 24 hours have passed since the coating film was dried.
Further, this DBT is also excellent in the action of improving the adhesiveness between the silver plating layer and the undercoat layer.

At least one of the above-mentioned "silane coupling agent having an epoxy group" (hereinafter referred to as "epoxysilane") or the above "epoxy resin" is added to the alkoxytitanium ester compounded in the paint. Prepare the catalyst solution. As the epoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, ethyltrimethoxysilane, γ-glycidyloxypropylmethoxysilane, or the like, which has a high affinity with the paint, can be used. These epoxysilanes are added so as to be “0.5 to 5 parts by weight”, particularly 2 to 4 parts by weight, based on 100 parts by weight of the synthetic resin such as alkyd resin contained in the paint, as in the fourth invention. To do. If the addition amount is less than 0.5 part by weight, the adhesiveness between the undercoat layer and the silver plating layer tends to decrease. On the other hand, when the amount of epoxysilane is excessive, the hardness of the undercoat layer is lowered and wrinkles are generated, which is not preferable.

As the epoxy resin, various types such as bisphenol A type, brominated bisphenol A type, phenol novolac type and cresol novolac type can be used. These epoxy resins are added so as to be "5 to 15 parts by weight", particularly 7 to 13 parts by weight, based on 100 parts by weight of the synthetic resin contained in the paint, as in the fourth invention. If the amount added is less than 5 parts by weight, the adhesiveness between the undercoat layer and the silver plating layer will deteriorate. on the other hand,
If the amount of epoxysilane is excessive, the leveling property of the undercoat layer tends to decrease. By adding an appropriate amount of epoxysilane or epoxy resin to the alkoxytitanium ester, the adhesiveness between the undercoat layer and the silver plating layer can be sufficiently improved.

The above-mentioned "undercoat agent" is prepared by mixing the stored coating material such as synthetic resin coating material with an alkoxytitanium ester to which at least one of epoxysilane and epoxy resin is added. The blending amount is the same as that of the third invention, that is, the synthetic resin 1 contained in the paint.
It is preferable that the amount of the alkoxytitanium ester is “10 to 25 parts by weight”, especially 15 to 20 parts by weight, based on 00 parts by weight. This undercoating agent is applied to a desired portion of the inner surface or the outer surface of the lamp housing. Alkoxytitanium ester has the function of promoting the precipitation of silver. The alkoxy titanium ester also facilitates the drying of the undercoat agent and improves the adhesion between the undercoat agent and the silver plating layer. The undercoating agent is applied to the lamp housing by brushing,
It can be performed by an appropriate method such as spraying,
Spray coating is preferred.

[0016] Alkoxy titanium ester to which epoxy silane or epoxy resin is added is usually
Since it can be stably stored for about one month, it is not necessary to mix it immediately before use. However, after mixing with the paint,
Since the pot life is completely different depending on the type of paint, it is preferable to mix only the required amount. Further, the alkoxytitanium ester is sensitive to moisture, and it is desirable to use it at a relative humidity of 65% or less. If the humidity is high,
Due to a fogging phenomenon, unevenness due to insufficient leveling, and the like, it may not be possible to form a silver-plated layer having a required reflection performance on the inner or outer surface of the lamp housing.

The thickness of the coating film of the undercoat agent is 2 to 15
Micron, especially about 3 to 8 micron is preferable, and this is dried to form the "undercoat layer". This undercoat layer has a clean surface, has a high catalytic activity for depositing silver, and has excellent adhesion to the silver plating layer. Further, the gloss of the obtained silver-plated layer can be easily adjusted as desired by the composition of the undercoat layer. The silver deposited by the catalytic action of the alkoxytitanium ester is fixed to the surface of the undercoat layer by the ester residue and epoxysilane or epoxy resin, and is not easily peeled off.

The coating film made of the undercoating agent formed on the inner or outer surface of the lamp housing is dried for 15 to 30 minutes at a temperature of 60 to 70 ° C. in a hot air drying oven or the like. Insufficient drying may cause clouding or cracking of the silver plating layer due to the influence of the residual solvent.
On the other hand, if the drying is excessive, the hydrolysis of the alkoxytitanium ester proceeds too much, which causes insufficient deposition of silver and poor adhesion to the undercoat layer. It is convenient in operation that the temperature of this drying is as low as possible because the allowable range of the drying time is wide. Further, depending on the type of paint, it may be dried at room temperature of about 20 to 35 ° C. for about 2 to 4 hours. Furthermore, it is necessary to be careful not to attach dust, etc. in the air during the drying process. By cleaning the surface of the undercoat layer with pure water or other chemicals for 1 to 2 seconds immediately before the silver mirror reaction. Can be dealt with.

An aqueous solution containing silver ions is applied to the surface of the undercoat layer. The aqueous solution containing this silver ion is
It is preferable to spray and apply simultaneously with the aqueous solution containing the reducing agent. Moreover, it is more preferable to spray these aqueous solutions simultaneously with a two-headed gun. That is, by spraying the ammoniacal silver nitrate aqueous solution and the reducing aqueous solution at the same time with a spray coater having a two-headed gun, etc., in a short time of about 1 to 10 seconds, particularly 2 to 7 seconds, further 2 to 5 seconds. It is possible to form the above-mentioned "silver plating layer" having an excellent appearance.

The higher the concentration of both solutions, the more quickly silver will be deposited, and the lower the concentration, the slower it will be. Therefore, it is necessary to appropriately adjust the concentration depending on the size of the sprayed area, the temperature of the working environment, and the like. In order to improve the wettability of the silver ion-containing aqueous solution with respect to the undercoat layer, a surfactant may be added to the silver ion-containing aqueous solution. Since the aqueous solution containing silver ions is an ionic solution, this surfactant is a nonionic surfactant that does not cause a reaction, especially a nonionic surfactant having an ethylene oxide group and a hydroxyl group as hydrophilic groups. Activators are preferred.

The aqueous solution containing silver ions is 20 to 3
At room temperature of about 5 ° C., in an ammoniacal silver nitrate aqueous solution, 0.3 to 3% by weight, particularly about 0.6 to 2% by weight of silver nitrate is dissolved in water for adjustment. As the reducing aqueous solution, an aqueous solution containing a reducing agent such as glyoxal in an amount of 2 to 10% by weight, particularly about 3 to 7% by weight is used. A good silver plating layer can be formed by simultaneously spraying an equal amount of the aqueous solution having such a concentration onto the surface of the undercoat layer.

Further, the influence of the temperature of the working environment is very large, and at a low temperature of around 10 ° C., almost no silver precipitation is observed in the above-mentioned aqueous solution having a normal concentration, and an aqueous solution having a concentration of 5 to 6 times is required. Therefore, it is uneconomical. In such a case, it is necessary to take measures such as raising the temperature of the aqueous solution. on the other hand,
If the temperature is higher than necessary and the rate of silver deposition is too high, the silver plating layer may become cloudy. Therefore, considering the speed of forming the silver plating layer, workability, cost, etc. as a whole, it is preferable to set the temperature of the working environment to about 20 to 35 ° C.

If desired, a top coat layer may be formed on the surface of the silver plating layer to protect the silver plating layer. As the top coat layer, a paint used on the surface of the plating layer formed by a usual electrolytic plating method can be used. However, the silver plating layer formed by this silver mirror reaction does not necessarily have excellent adhesiveness with the undercoat layer as compared with a general aluminum film, and thus excellent adhesion with a silicone-modified resin coating or the like. It is preferable to use a paint having properties. The thickness of the top coat layer is not particularly limited, and may be a thickness that covers the entire silver plating layer and can sufficiently prevent peeling from the undercoat layer.

The vehicle lamp of the present invention may be provided with a lens and a lamp housing which are integrally molded by a die slide injection molding method.

The vehicle lamp manufacturing method of the fifth invention is a method for manufacturing a vehicle lamp by a die slide injection molding method, wherein a lens is molded by one of the molds in the primary injection step, After molding the lamp housing with the other mold, the mold is opened, then the movable mold is moved to a position where the lens and the lamp housing face each other, then the mold is closed, and then the secondary injection step In, a resin is injected to the outer peripheral edge portion of the contact surface between the lens and the lamp housing, the lens and the lamp housing are integrally joined , and then the lamp
Alkoxy titanium ester on the outer surface of the housing
And a silane coupling agent and epoxy having an epoxy group
From paint containing at least one of the xy resin
Apply an undercoat agent that
Forming a coat layer and then the surface of the undercoat layer
And an aqueous solution containing silver ions and water containing a reducing agent.
Form a silver-plated layer by coating with a solution and drying.
It is characterized by performing .

The lens of the vehicle lamp and the lamp housing can be integrally formed by a blow molding method, an injection molding method or the like. The vehicular lamp has a lens and a lamp housing that have complicated phases, but can be easily integrally formed by the "die slide injection molding method". Further, when a uniaxial injection molding machine is used, the lens and the lamp housing are made of the same resin, but the resin may be injected to join the lens and the lamp housing together. It is preferred to use the same or at least similar resins. By thus joining the lens made of the same resin and the lamp housing with the same or similar resin, it is possible to obtain a vehicle lamp that is more firmly integrated. In addition, with this similar resin,
It means that the kind is the same and the molecular weight, the crystallinity and the like are different, or that various additives are mixed and the like.

On the other hand, if a biaxial injection molding machine is used, the lens and the lamp housing can be made of different resins. Then, if the lens and the lamp housing are joined with a resin that can be joined with sufficient strength to both the resin forming the lens and the lamp housing, a vehicle lamp without any problems in integrity, strength, etc. can be obtained. it can. Further, according to the biaxial injection molding machine, the lens can be colored and transparent or colorless and transparent, and the lamp housing can be opaque or colored or colorless and transparent. In particular, as the resin, polycarbonate (hereinafter, "P
"C". ) Or polymethylmethacrylate (hereinafter,
It is called "PMMA". By using an acrylic resin such as) or the like and coloring the lens and the lamp housing together, or by making them colorless and transparent, it is possible to obtain a vehicle lamp with high practicality and design. The lens can be colored in a desired color such as red, green, orange, amber, or amber depending on the type of lamp.

In a vehicle lamp, a reflecting film is usually provided on the lamp housing. However, when the lens and the lamp housing are integrally formed by a die slide injection molding method, the reflecting film is formed on the "outer surface of the lamp housing. Will be provided at the required locations. Therefore, especially 2
PC or PM with excellent transparency not only in the lens but also in the lamp housing, even when using a shaft injection molding machine
It is preferably formed of an acrylic resin such as MA. As a result, a vehicular lamp having an excellent regular reflectance can be obtained. PC, PMMA, and the like are more expensive than polypropylene, which has been conventionally used as a resin for forming a lamp housing, and which is blended with an inorganic filler such as talc. However, since the rigidity is high and the wall thickness can be reduced, there is no disadvantage in terms of product price.

[0029] In the vehicle lamp, the lens and the lamp housing are joined together in-line, reflective film,
As described above, it is formed on the outer surface of the lamp housing. The formation of the reflective film on the outer surface of such a lamp housing is much easier to work and the productivity is improved as compared with the case where the reflective film is provided on the inner surface. Moreover, the thickness of the reflective film can be made more uniform, and the reflectance can be easily adjusted. Furthermore, even if there are variations in film thickness, the reflection performance is not affected at all. This reflective film can be formed by sticking an aluminum foil or by applying a solution containing silver ions or the like and drying. The film can also be formed by a method such as vapor deposition or sputtering, but it is preferable to have a silver plating layer. This silver-plated layer can be formed as in the case of the vehicle lamp of the first invention, as in the fifth invention.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION A method for integrally forming a lens and a lamp housing by a die slide injection molding method and a method for providing a reflection film on the outer surface of the lamp housing by a silver mirror reaction will be described below. (1) Integral molding of lens and lamp housing Fig. 3 (a) shows that the lens 1 is molded in one cavity provided between the movable mold A and the fixed mold B by the primary injection process. It shows that the lamp housing 2 is molded in the other cavity. After the lens 1 made of acrylic resin such as PC or PMMA and the lamp housing 2 are molded in this way, the movable mold A and the fixed mold B are opened to make the lens 1 movable.
3 (b) shows that the lamp housing 2 is housed in the cavity of the fixed mold B and the lamp housing 2 is housed in the cavity of the fixed mold B.

After that, as shown in FIG. 3C, the hydraulic device C
The movable mold A is slid by, and the lens 1 housed in the cavity of the movable mold A is moved to a position facing the lamp housing 2 housed in the fixed mold B. Next, the mold is closed at a position where the lens 1 and the lamp housing 2 face each other, and the lens 1 and the lamp housing 2 are closed.
Are integrally contacted with each other at the peripheral edge of the end face thereof, and then a resin of the same kind as that of the lens 1 and the lamp housing 2 is preferably injected to the outer peripheral edge of the contact surface between the lens 1 and the lamp housing 2 by the secondary injection step. Then, FIG. 3D shows a state in which the lens 1 and the lamp housing 2 are integrally joined.

(2) Toluene was used as a solvent for forming a reflective film composed of an undercoat layer, a silver plating layer and a topcoat layer, and 30 g of an alkyd resin was dissolved in 34 ml of this solvent to prepare a paint. On the other hand, D
Epoxy silane (manufactured by Shin-Etsu Silicone Co., Ltd., trade name "KP-39") on 5 g of BT (manufactured by Mitsubishi Gas Chemical Co., Inc.)
2 ") 1 g was added. Then, DBT added with this epoxysilane was blended in the coating material, stirred and mixed to prepare an undercoat agent. Then, this undercoating agent was applied by spraying to the required locations on the outer surface of the lamp housing 2 molded in (1) to form a coating film having a thickness of 5 microns. After that, with a hot air drying oven,
It was dried at a temperature of 65 ° C. for 20 minutes to form an undercoat layer having a thickness of 5 μm.

Then, an aqueous solution containing silver ions and an aqueous solution containing a reducing agent were sprayed onto the surface of the undercoat layer by a spray coater having a two-head gun to apply the solution.
As the aqueous solution containing silver ions, an aqueous solution containing 1.5% by weight of silver nitrate was used. As the aqueous solution containing the reducing agent, an aqueous solution containing 5% by weight of glyoxal was used. Including the temperature of these aqueous solutions, the temperature of the working environment was set to 25 ° C., and equal amounts of both aqueous solutions were sprayed. After a few seconds, a silver-plated layer was formed that had a haze-free and glossy and beautiful appearance. When the adhesiveness (adhesiveness) of this silver-plated layer was evaluated by the cross-cutting method of JIS K 5400, it was found that there was almost no peeling and that it had very good adhesion.

Thereafter, a silicone-modified resin coating (manufactured by Shin-Etsu Chemical Co., Ltd., trade name “KR-
5206 ″) was similarly applied by a spray method to form a coating film having a thickness of 5 μm. Then, this was dried for 40 minutes at a temperature of 75 ° C. in a hot air drying oven to form a top coat layer. The silver coating layer was sufficiently protected by this top coat layer.

[0035]

According to the vehicle lamp of the first aspect of the present invention, the silver plating layer is formed on the surface of the undercoat layer having a specific composition and excellent adhesion to the lamp housing. Therefore, it is possible to form a reflection film having excellent light-condensing and reflecting performances by a simple operation and process. This reflective film is also excellent in durability and the like.

Further, by integrally forming the lens and the lamp housing by the die slide injection molding method, water, dust and the like can be surely prevented from entering the lamp due to a poor sealing at the fitting portion between the lens and the lamp housing. To be prevented. Furthermore, a sealant such as an adhesive is not required, and a product with excellent design can be obtained. In addition, the sealing cost for fitting is not required, and the width of the lamp can be made substantially the same as that of the light source bulb, and the product can be easily downsized.

Further, since the lamp housing is made of a resin having excellent transparency, the reflection film can be formed on the outer surface of the lamp housing, the work is easy, the productivity is improved, and the film thickness of the reflection film is uniform. Can be Further, even if there are variations in film thickness, the function of the reflective film is not impaired. The lens, the lamp housing, and the resin that integrally joins them together can be easily recycled if the same or similar resin is used. Furthermore,
In this vehicle lamp, both the lens and the lamp housing can be lens-cut molded, and they are excellent in light collecting performance or design.

Further, according to the method for manufacturing a vehicle lamp of the present invention, the lens and the lamp housing are integrally formed, and the vehicle lamp having excellent characteristics can be easily manufactured. In this vehicle lamp manufacturing method, the lens and the lamp housing are melted and bonded in the secondary injection step, so that the integrity is very high. Furthermore, since the process is simple and the number of molds can be reduced, the product cost can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a vehicle lamp including an integrally molded lens and a lamp housing.

FIG. 2 is a cross-sectional view of a conventional vehicle lamp in which a separately molded lens and a lamp housing are fitted together and sealed with an adhesive.

FIG. 3 is a schematic view showing a process of integrally molding a lens and a lamp housing by a die slide injection molding method.

[Explanation of symbols]

1; lens, 2; lamp housing, 3; joint, 4;
Reflective film provided on outer surface of lamp housing, 5; Fitting part, 6; Hot melt adhesive, 7; Reflective film provided on inner surface of lamp housing, 8; Light source bulb, 81;
Valve socket, A: movable mold, B: fixed mold, C: hydraulic device.

Front Page Continuation (72) Inventor Katsuhiro Tange 8-1 Tocho, Fujii-cho, Anjo City, Aichi Prefecture Inoac Corporation Sakurai Works (56) References JP-A-4-331123 (JP, A) JP-A 11- 162210 (JP, A) JP 63-50570 (JP, A) JP 6-320576 (JP, A) JP 8-96774 (JP, A) JP 53-20682 (JP, A) JP-A-58-137901 (JP, A) JP-A-7-235203 (JP, A) Actual opening 62-77803 (JP, U) Actual opening Sho-56-35706 (JP, U) Actual opening Sho-50-89055 (JP, U) Actual development Hei 5-81903 (JP, U) Actual development Sho 50-89055 (JP, U) Japanese Patent Sho 49-17716 (JP, B1) (58) Fields investigated (Int.Cl. ⁷⁾ , DB name) F21S 8/10 F21Q 1/00-3/00 F21M 3/00-7/00 F21V 7/00-13/00 B29C 45/00 H01K 7/00 B60K 1/00

Claims (5)

(57) [Claims] 1. A vehicle lamp comprising a lens and a lamp housing, wherein a reflective film is provided at a required portion of the lamp housing, wherein the reflective film is formed on an inner surface or an outer surface of the lamp housing. An undercoat layer and a silver plating layer formed on the surface of the undercoat layer, wherein the undercoat layer is an alkoxy titanium ester, and at least one of a silane coupling agent having an epoxy group and an epoxy resin. A vehicle lamp characterized by being formed by drying an undercoating agent made of a paint containing a. 2. The alkoxytitanium ester is
2. The vehicle lamp according to claim 1, which is a polymer of butyl titanate dimer or tetra-n-butyl titanate. 3. The alkoxytitanium ester is contained in an amount of 10 to 2 with respect to 100 parts by weight of a resin contained in the paint.
The vehicle lamp according to claim 1, which is 5 parts by weight. 4. The silane coupling agent having an epoxy group is 0.5 to 5 parts by weight, and the epoxy resin is 5-1 to 100 parts by weight with respect to 100 parts by weight of a resin contained in the paint.
The vehicle lamp according to any one of claims 1 to 3, which is 5 parts by weight. 5. A vehicle for a vehicle manufactured by a die slide injection molding method.
A method of manufacturing a lamp, comprising:
To mold the lens with one mold and the other mold
Therefore, after molding the lamp housing, open the mold and
After that, the lens and the lamp housing face each other.
Move the movable mold to the position, then close the mold,
Then, in the secondary injection process, the lens and the lamp
Resin is injected onto the outer peripheral edge of the contact surface with the housing, and
And the lamp housing are integrally joined, and the
After that, on the outer surface of the lamp housing,
And a silane coupler having an epoxy group
And at least one of epoxy resin and epoxy resin.
Apply an undercoating agent consisting of
To form an undercoat layer, and then the undercoat layer is formed.
Aqueous solution containing silver ion and reduction on the surface of coating layer
Agent coated with an aqueous solution containing, by a this drying
A lamp for a vehicle characterized by forming a silver-plated layer.
Manufacturing method .