JPS6361072B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a paint coating device, and more particularly, to a device that can automatically apply masking paint in a uniform width to, for example, the inner peripheral edge of a vehicle window glass as a coating site.

Conventional technology and problems to be solved In recent years, the direct glazing method, in which the window glass is directly attached to the window frame via a sealant, has been adopted on the automobile assembly line, and the gap between the periphery of the window glass and the window frame of the vehicle body is sealed. Therefore, moldings are installed using the flat mount method in an attempt to reduce assembly costs, but moldings tend to become thinner due to the demand for a wider field of view during driving and a larger external appearance of the window glass. Since the sealing material for attaching the window glass is visible from the outside and impairs the appearance, the periphery of the window glass is masked.

However, since this masking is generally performed manually using a brush, the operator's skill is required to form a masking surface of uniform width, and it can be said that the work efficiency is poor.

An object of the present invention is to provide a paint application device that can form a paint film with a simple, quick, and uniform width during brush application of paint, including such masking work.

As a result of consideration in view of this purpose, the present inventors found that
By regulating the widthwise side of the tip of the brush that comes into contact with the application area and automatically sliding the brush along the application area while supplying a fixed amount of paint, the paint application device for the intended purpose can be designed. The present invention has been completed based on the discovery that this can be done.

Structure and Effects of the Invention That is, the present invention provides a brush means having a flat rectangular cross-sectional tip in which a paint pressure feeding pipe from an automatic paint supply device is inserted and fixed inside from the rear end, and the brush means has a flat rectangular tip. A paint application device comprising: a box-shaped container that surrounds the container except for the tip and has regulating pieces protruding from both sides; and a system that automatically slides the brush means along the application area. It provides:

Any paint that is generally applied with a brush can be used as the paint that is the object of the present invention. Among them, as the masking paint, it is preferable to use an organosilane-based organic solvent type cold-curing paint containing carbon black. Since this silane paint has the function of a primer, it is possible to omit the primer treatment that is necessary when using, for example, an inorganic ceramic paint. The above silane-based paints include (a) epoxysilane (γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, 3,4-epoxycyclohexylethyltrimethoxysilane, 3,4-epoxycyclohexylethyl methyldimethoxysilane, γ-glycidoxypropylmethyldiisopropenoxysilane, etc.) and silanes with functional groups active toward epoxy groups (aminomethyltriethoxysilane, N-(β-aminoethyl)aminomethyltrimethoxy) Silane, aminomethylmethyldiethoxysilane, N-(β-aminoethyl)aminomethyltributoxysilane, γ-aminopropyltriethoxysilane, γ-aminopropylmethyldiethoxysilane, γ-aminoisobutyltrimethoxysilane, γ- Mercaptopropyltrimethoxysilane, N-bis(β-hydroxyethyl)-γ-
Aminopropyltriethoxysilane, N-(β-
N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-(β-aminoethyl)-γ-amino-β-methylpropyltrimethoxysilane, etc. ) and the reaction product (the reaction is set at a ratio of 0.3 to 1 mole of silane having a functional group active toward epoxy groups per mole of epoxysilane, and the reaction is carried out in an organic solvent such as methyl ethyl ketone at room temperature for about 20 hours. A mixture of one or more of (b )
Film-forming substances (polyester resin, chlorinated rubber,
polyvinyl chloride resin, polyacrylate resin, silicone resin, epoxy resin, ethylene vinyl acetate copolymer, etc.), polyisocyanate [trimethylhexamethylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, lysine diisocyanate methyl ester, tolylene diisocyanate, desmodyur N (polyisocyanate manufactured by Bayer), Coronate HL (polyisocyanate manufactured by Nippon Polyurethane), etc.], and silanes having active functional groups in the polyisocyanate and isocyanate groups [aminomethyltriethoxysilane, N-(β-aminoethyl ) Aminomethyltrimethoxysilane, Aminomethylmethyldiethoxysilane, N-(β-
aminoethyl)aminomethyltributoxysilane, γ-aminopropyltriethoxysilane, γ
-aminopropylmethyldiethoxysilane, γ-
Aminoisobutyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, N-bis(β-hydroxyethyl)-γ-aminopropyltriethoxysilane, N-(β-aminoethyl)-γ
-aminopropyltrimethoxysilane, N-(β
-aminoethyl)-γ-aminopropylmethyldimethoxysilane, N-(β-aminoethyl)-γ-
Amino-β-methylpropyltrimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldimethoxysilane, 3,4-epoxycyclohexylethyltrimethoxysilane, 3,4-epoxycyclohexylethylmethyldimethoxy (c) carbon black or a pigment component containing it [lamp Inorganic pigments such as black, titanium white, red iron oxide, titanium yellow, zinc white, red lead, cobalt blue, iron black, aluminum powder, etc., Neo Pomelo Black RE, Neo Black RE, Orazol Black
CN, Orazol Black Ba (all manufactured by Ciba-Geigy), and Spiron Blue 2BH (manufactured by Hodogaya Chemical Co., Ltd.)], and these are mixed with a suitable organic solvent (ketone such as methyl ethyl ketone or acetone). esters such as ethyl acetate, butyl acetate, ethers such as ethyl ether, tetrahydrofuran, dioxane, toluene, xylene, methylene chloride, etc.), and if necessary, add ultraviolet absorbers and fillers ( glass powder, glass flakes, molecular sieves, powdered silica gel, clay, ultrafine powdered silicic acid, etc.), thickeners, dehydrating agents, plasticizers (butylbenzyl phthalate, dioctyl phthalate, dibutyl phthalate, chlorinated paraffin, etc.), etc. Consists of a blended system. The mixing ratio of the above essential components (a to c) is usually 100 parts (by weight, the same applies hereinafter) of component (a) to 100 to 200 parts of component (b), and the total of components (a) and (b). Component (c) 5 for 100 parts
-200 parts, preferably 30-100 parts.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The paint application device of the present invention will be described in detail below with reference to the accompanying drawings.

The apparatus is shown in FIGS. 1 and 2, in which a paint pumping pipe 2 is inserted from the rear end into the brush means 1 having a flat rectangular tip 1a (see FIG. 2).
At the same time, the entire brush means is surrounded with a box-shaped container 3 except for the tip 1a, and regulating pieces 3a protrude from both sides of the container 3.
3a restricts the width direction side surface of the tip portion 1a. The pressure-feeding pipe 2 is connected to an automatic paint supply device consisting of a pressure-feeding pump 5 and a paint storage tank 6. Here, a system is adopted in which a pressure pump 5 (fan flow pump, commonly known as a caterpillar pump) is installed between the pressure feed pipe 2 and the paint storage tank 6, but instead of this, air pressure, inert gas, solvent vapor, etc. This system supplies the paint in the storage tank 6 using a pressurized pressure tank system.

Further, as for the means (not shown) for automatically sliding the brush means 1 along the application site, a conventional system may be adopted, for example, a pipe cover 2 preferably connected to or integrally formed with the container 3. 'or the upper end of the container 3 may be attached to the arm of an automatic control robot that operates in response to command signals. Furthermore, if necessary, it is preferable to provide a guide means 4 for aligning the widthwise side end of the tip end of the brush means 1 along the periphery of the window glass W.

The brush means may be of any type as long as it can be applied by dipping liquid into it and is resistant to solvents, and may be constructed using a member capable of utilizing capillary action, such as a tampon or felt, in addition to an ordinary brush for application. It is preferable that the tip portion 1a protrudes from the opening of the container by about 2 to 10 mm.

It is preferable that the regulating piece 3a is formed by cutting out a chevron-shaped or circular shape on both sides of the box-shaped container 3, with the central part, which is slightly shorter than the tip 1a of the brush means, as the apex.

When paint is pressurized into the brush means 1 from the pressure pipe 2 by the pressure pump 5, it fills the brush means 1 with capillary action and gradually begins to seep out from the tip 1a, as shown in FIG. When the guide means 4 is brought into contact with the peripheral edge of the window glass W, and the tip portion 1a is moved to slide into contact with the inner peripheral edge of the window glass W by the above-mentioned robot system,
Since the side surfaces in the width direction of the tip portion 1a are regulated by the regulating pieces, a coating film 7 having a uniform width is automatically formed.

Note that the pumping amount should be adjusted in relation to the coating speed, and is set in consideration of the physical properties of the paint and the structure of the brush means.

Next, the present invention will be explained in more detail with reference to Production Examples and Examples.

Production example (manufacture of organosilane-based organic solvent-based room-temperature curing paint containing carbon black) 236 g of a 10% methyl ethyl ketone solution of γ-glycidoxypropyltrimethoxysilane is placed in a reaction vessel.
and 222 g of a 10% methyl ethyl ketone solution of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane were added and mixed, and the mixture was allowed to stand at 50°C for 20 hours to obtain a solution of the reaction product.

100 parts of the solution of the epoxysilane reaction product, 10 parts of carbon black, and 10 parts of silicone resin are sufficiently stirred and mixed in a closed container to obtain the title paint.

EXAMPLE The paint prepared in the manufacturing example was pumped using the paint coating apparatus of the present invention shown in FIG. 1 at a paint feed rate of 0.59 g/min, and the paint was applied through a window as shown in FIG. 3 at a coating speed of 15 m/min. A masking surface with a width of 2.0 cm and a thickness of 10 μm is formed over 3 m of the inner peripheral edge of the glass W in 15 seconds. It can be seen that the width error is about ±0.5 mm and the thickness error is about ±3 μ, which is an industrially acceptable masking surface.

After drying this masking surface for 1 minute, directly apply a sealant, such as a one-component moisture-curing urethane sealant (trade name Betaseal #551, manufactured by Sunstar Giken Co., Ltd.) in a bead shape, without applying a primer. After curing and curing for one week, a peel test was performed, but the sealant failed cohesively and the adhesiveness was good. Separately, the back side of the glass coated with the above paint was irradiated for 5000 hours with a Sunshine Weatherometer, but there were no problems with the paint peeling, cracking, discoloration, blistering, etc., and it showed good weather resistance.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the paint application device of the present invention;
The figure is a cross-sectional view taken along the line -- in FIG. 1, and FIG. 3 is an explanatory diagram of a masking operation using the paint application device of FIG. 1. DESCRIPTION OF SYMBOLS 1...Brush means, 1a...Tip part, 2...Pipe for pressure feeding, 3...Container, 3a...Regulation piece, 4...
Guide member.

Claims (1)

[Scope of Claims] 1. A brush means having a tip with a flat rectangular cross-section, into which a pipe for pressurizing paint from an automatic paint supply device is inserted and fixed from the rear end, the brush means having the tip portion left intact. What is claimed is: 1. A paint application device comprising: a box-shaped container that surrounds a container having regulating pieces protruding from both sides; and a system for automatically sliding the brush means along a coating area. 2. The paint applicator according to item 1, further comprising guide means for aligning the widthwise side ends of the brush means along the application area.