JP2002336747A - Method for coating panel material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the appearance of a coated instrument panel 1 while the adhesion of a masking material to the surface of a lower panel part 3 and the removal of the masking material are facilitated, when coating is sprayed to be applied on the surface of the upper panel part 2 of the instrument panel 1 to make the color different from that of the uncoated lower panel part 3 in which opening parts 12, 13, and 16 are formed. SOLUTION: While a masking member 20 is adhered to the surface of the upper panel part 2, liquid polyvinyl chloride is sprayed on the surface of the lower panel part 3 with the opening parts 12, 13, and 16 opened to form a flexible resin coat 25. After that, the masking member 20 of the upper panel part 2 is removed, and a water base coating material is sprayed on the coated surface of the upper panel part 2 to form a coating film 26. Next, the resin coat 25 of the lower panel part 3 is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of spraying a paint on a panel material to apply the paint.

[0002]

2. Description of the Related Art Conventionally, paint has been generally applied to a part of interior and exterior members of an automobile by spraying the paint. At this time, the paint adheres to a non-painted surface, resulting in poor appearance. In order to prevent this, masking is performed by covering a non-painted surface with a predetermined member. For example, Japanese Utility Model Registration No. 256769 discloses the use of a masking member made of a sheet material such as a resin when coating a bumper of an automobile. This masking member is formed in advance so as to correspond to the shape of the bumper, and in order to prevent mist-like paint from wrapping around the non-painted surface side and adhering through an air inlet opening to the bumper. A fitting portion is formed so as to be fitted to the air intake and to close the intake.

[0003] For example, see Japanese Patent Application Laid-Open No. 2000-42921.
As disclosed in Japanese Unexamined Patent Publication, in the case of engraving a predetermined pattern on a substrate made of metal or the like by sandblasting, in order to remove a masking material or an attached abrasive applied for anti-sandblasting after engraving, There is known a method in which a liquid resin is applied to a resin, and after curing, the resin is peeled off to remove a masking material and an abrasive together with the resin. The resin used in this conventional example has sufficient flexibility and tensile strength after curing, and can be peeled off at a time from a part thereof to the whole.

[0004]

In the case of the former conventional example (U.S. Pat. No. 5,667,695), a masking member of a predetermined shape formed in advance is fitted to the bumper. It is difficult to bring the masking member into close contact with the inner periphery without any gap, and it is necessary to fix the masking member to the periphery of the opening using an adhesive tape or the like.

[0005] In particular, in a case where a peripheral wall extending from the peripheral edge of the opening to the rear of the panel is formed, such as an instrument panel in a vehicle cabin, it is time-consuming to attach a masking member to such a peripheral wall. In addition, there is a problem that it is difficult to remove the masking member after painting.

Further, in the case of a panel material having a complicated surface shape formed by combining a large number of curved surfaces and openings as in the case of the instrument panel, the masking member may be adhered so as to exactly match the surface shape. It is difficult, and there is a problem that the paint enters and adheres to the gap between the masking member and the non-painted surface at each edge of the panel.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to improve the masking method and the material of the masking member at the time of coating, to mask the unpainted surface, and to use the masking member. It is an object of the present invention to make the appearance of the panel material after coating good while facilitating the removal of the panel material.

[0008]

In order to achieve the above object, according to the solution of the present invention, a paint is applied after forming a flexible film on an unpainted surface of a panel material.

More specifically, the invention of claim 1 is based on the premise of a panel material coating method in which a paint is sprayed onto the painted surface so as to have an unpainted surface and a painted surface on the surface of the panel material. In a state where the masking member is applied to the painted surface of the panel material, a liquid resin is sprayed on the non-painted surface to form a flexible coating, and then, the masking member on the painted surface is removed to form the coating. A paint is applied to the surface, and then the coating on the unpainted surface is removed.

In the above-mentioned method, since the masking member is applied to the painted surface and the film is formed on the non-painted surface with the resin, the masking on the unpainted surface can be performed reliably. This makes it possible to prevent the paint from adhering to the non-painted surface when the paint is applied after removing the masking member on the painted surface, so that the panel materials can be separately painted with a good appearance. In addition, since the liquid resin is sprayed and the coating is formed in close contact with the entire non-painted surface, masking of the non-painted surface can be performed easily and reliably even when the shape of the non-painted surface is complicated. Can be. Further, the flexible film formed on the non-painted surface in this way can be easily removed at once after painting.

According to a second aspect of the present invention, in the first aspect, the resin forming the flexible film is any one of polyvinyl chloride, wax, and vinyl acetate. By using these resin materials, a flexible film can be easily formed, and the flexible film can be easily peeled and removed after a paint is applied to a painted surface.

According to a third aspect of the present invention, in the first aspect of the present invention, an opening is formed in a non-painted surface of the panel material. When using the traditional masking method,
The coating material flows from the back side of the panel material to the unpainted surface through the opening formed in the non-painted surface of the panel material. Thus, the masking can be easily and reliably performed, and the adhesion of the paint to the non-painted surface through the opening can be prevented.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an automobile instrument panel 1 as a panel material coated by the coating method of the present invention.
Is shown.

The instrument panel 1 is an injection-molded article made of a resin material, and comprises an upper panel portion 2 constituting about the upper half and a lower panel portion 3 constituting the remaining lower portion. The portion is disposed on the front end side of the vehicle compartment such that the portion is located on the left side of the vehicle body and the right side portion is located on the right side of the vehicle body.

At a substantially central portion of the upper panel portion 2 of the instrument panel 1 in the vehicle width direction, two rectangular central air outlets 4 and 4 are opened side by side in the vehicle width direction. The downstream end of an air-conditioning duct (not shown) provided in the ment panel 1 is connected. Relatively large rectangular openings 5 and 6 are formed on the left and right sides of the central air outlets 4 and 4, respectively. Of the left and right openings 5 and 6, the left opening 5 is formed. An airbag door (not shown) is provided, and instruments (not shown) are provided in the right opening 6. A hood 8 is provided extending from the right edge of the vehicle body to the upper edge and the left edge of the opening 6 toward the passenger compartment from the edge. Further, right air outlets 9, 9 to which an air conditioning duct is connected in the upper panel portion 2 on the right side of the hood 8 like the central air outlets 4, 4, are opened side by side in the vehicle longitudinal direction. An air outlet similar to the two right air outlets 9, 9 is also opened on the left side of the upper panel portion 2, and serves as left air outlets 10, 10. On the front end side of the upper panel portion 2, a large number of air outlets 11, 11, ... to a front window (not shown) are arranged in the vehicle width direction.

On the other hand, in the lower panel portion 3, two rectangular openings 12 and 13 are formed in front of and behind the central air outlets 4 and 4 in the upper panel portion 2. , 13 are respectively provided with a control switch of an air conditioner, a CD deck, etc., although not shown. Of the two openings 12 and 13, the rear opening 13 is formed relatively large, and a peripheral wall 14 extending from the peripheral edge of the opening to the back side of the instrument panel 1 is formed. In the lower panel portion 3, an opening 16 in which a glove box (not shown) is provided is formed in a portion on the left side of the openings 12 and 13, while a cover for a steering column (not shown) is provided in the right portion. Thus, the notch 17 is formed.

The instrument panel 1 configured as described above includes a surface of the upper panel portion 2, that is, a surface of the upper panel portion 2 on the side of the passenger compartment, and the openings 4 to 6, 9 to 11 of the upper panel portion 2. Painting is performed on the inner peripheral surface and the entire surface of the hood 8, whereby the upper panel 2
And the lower panel 3 have different colors. Less than,
The procedure of the coating will be described with reference to FIGS.

First, as shown in FIG. 2, the coating surface of the upper panel portion 2 is masked by a masking member 20 formed by molding a resin plate member. The masking member 20 has a shape substantially conforming to the surface shape of the upper panel portion 2 so as to closely cover the surface of the upper panel portion 2 on the vehicle interior side. As described above, the openings that are opened on the surface of the upper panel portion 2 on the vehicle interior side are respectively closed.

The masking member 20 is fixed by engaging the front edge and the rear edge thereof with the front edge and the rear edge of the upper panel 2, respectively. More specifically, with respect to the fixing structure of the masking member 20, the front edge side of the masking member 20 extends so as to correspond to the front edge side of the upper panel portion 2, and the front edge portion of the masking member 20 projects to the back side of the instrument panel 1. And a claw-shaped front locking portion 21 that engages with the back side of the front edge of the upper panel portion 20 is formed at the tip of the protruding portion. Also, the upper panel section 2 and the lower panel section 3
And a groove 22 that is open to the vehicle interior side is formed at both ends in the vehicle width direction.
The rear edge side extends to a position corresponding to the groove portion 22, and the end edge portion is bent toward the upper panel portion 2 side so as to engage with the groove portion 22 to form a rear locking portion 23. .

After the masking member 20 is attached to the upper panel portion 2, the surface of the lower panel portion 3, that is, the surface of the lower panel portion 3 on the side of the passenger compartment, the openings 12, 13, 16 and the notches in the lower panel portion 3 are formed. By forming a resin film on the inner peripheral surface of the portion 17, masking is performed on the unpainted surface as shown in FIG. The material for forming the coating in this embodiment is polyvinyl chloride, but is not limited to this. If the resin has flexibility after curing such as polyvinyl chloride, for example, wax or vinyl acetate may be used. Good.

Masking material 25 made of the resin film
After the polyvinyl chloride is converted into a liquid having a predetermined viscosity by a solvent, the polyvinyl chloride is applied to the non-painted surface (lower panel portion 3) using a spray device. In addition, the code | symbol S1 in FIG. 3 shows the resin spray gun of a spraying apparatus. At this time, adhesion of the resin to the painted surface is prevented by the masking member 20 on the painted surface.

The applied liquid resin 25a is
Dry naturally without operating the atmosphere, but before completely drying and curing, the masking member 2 attached to the painted surface
Remove 0. This is because the masking member 2
If the liquid resin 25a adhered over the entire area is completely dried, the liquid resin 25a is integrated with the masking member 20, and when the masking member 20 is removed, even the resin coating 25 covering the non-painted surface may be continuously peeled off. This is to prevent this. The removal of the masking member 20 includes the front and rear locking portions 21 of the masking member 20,
23 is released from the locked state with the upper panel section 2.

Thereafter, after the resin coating 25 on the non-painted surface is completely cured, as shown in FIG. 4, painting is performed on the painted surface (upper panel portion 2). The paint is a conventionally used water-based paint, which is sprayed onto a painted surface by a spray device to form a coating film 26. The symbol S in FIG.
Reference numeral 2 denotes a paint spray gun for a spray device. At the time of this coating, the mist paint is applied to each opening 12 of the lower panel portion 3 from the outside of each edge of the upper panel portion 2 and the opening portions 4 to 6 and 9 to 11 through the back surface side of the lower panel portion 3. , 13, 1
6 and the vicinity of the notch 17, but since the resin coating 25 is in close contact with the inner peripheral surface thereof,
The paint does not directly adhere to these unpainted surfaces.

Next, as shown in FIG. 5, the resin film 25 formed on the unpainted surface is removed. At this time, since the resin coating 25 made of polyvinyl chloride has sufficient flexibility and tensile strength after curing, for example, the coating 25
By pulling up and pulling the corner, the film 25 can be removed at once from the corner to the whole. Further, for example, even when the peripheral wall 14 of the opening 13 is formed in a flange shape having a large width in the front-rear direction, since the resin film 25 has flexibility as described above, the vehicle It can be easily removed from the side and removed.

As shown in FIG. 6, the instrument panel 1 coated in this manner has no paint adhered to the non-painted surface of the lower panel portion 3, so that the upper panel portion 2 and the lower panel portion 3 are clean. It is divided and painted.

Therefore, according to the panel material coating method according to this embodiment, the coating 25 made of polyvinyl chloride is formed on the non-painted surface of the instrument panel 1, and the paint is applied in a state where it is securely separated from the painted surface. Since the masking is performed, the masking of the non-painted surface can be easily and reliably performed, and the appearance of the instrument panel 1 that has been separately applied can be improved. In addition, since the masking material on the non-painted surface, that is, the resin film 25, can be easily removed, the masking removal operation can be easily performed.

(Other Embodiments) The present invention is not limited to the above embodiments, but includes other various embodiments. That is, in the embodiment,
Although the instrument panel is painted, the present invention is not limited to this. For example, an interior panel material such as a lid or a door trim of an automobile glove box or an exterior panel material such as a bumper may be used. Furthermore, it may be a panel material other than an automobile, for example, an electric product, furniture, or the like.

[0029]

As described above, according to the method for coating a panel material according to the first aspect of the present invention, after a flexible film is formed on a non-painted surface of the panel material, a paint is applied to the painted surface. Thereafter, since the coating on the non-painted surface is removed, the masking on the non-painted surface can be easily and surely performed so that the panel material can be separately painted with a good appearance, and the coating on the non-painted surface is easily removed. be able to.

According to the second aspect of the present invention, the flexible film can be easily formed by using any one of polyvinyl chloride, wax and vinyl acetate as the resin for forming the flexible film. After applying the paint to the painted surface, the flexible film can be easily peeled and removed.

According to the third aspect of the invention, the non-painted surface having the opening can be easily and reliably masked by the resin film, and the adhesion of the paint to the non-painted surface through the opening can be prevented. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view of an instrument panel of an automobile according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 showing a state in which a masking member is attached to a painted surface.

FIG. 3 is a diagram corresponding to FIG. 2, showing a state in which a flexible coating is formed on an unpainted surface.

FIG. 4 is a diagram corresponding to FIG. 2, showing a state where a painted surface is painted.

FIG. 5 is a diagram corresponding to FIG. 2, showing a state in which a resin film is removed.

FIG. 6 is a diagram corresponding to FIG. 2, showing a state after completion of painting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument panel (panel material) 2 Upper panel part (painted surface) 3 Lower panel part (non-painted surface) 12, 13, 16 Opening 20 Masking member 25 Resin coating

Claims (3)

[Claims] 1. A method for coating a panel material, wherein a paint is sprayed on the painted surface so as to have an unpainted surface and a painted surface on the surface of the panel material, wherein a masking member is provided on the painted surface of the panel material. In the state where is applied, a liquid resin is sprayed on the non-painted surface to form a flexible film, and thereafter, the masking member of the painted surface is removed and the paint is applied to the painted surface. A method for coating a panel material, comprising: removing a film on the non-painted surface. 2. The method according to claim 1, wherein the resin forming the flexible film is any one of polyvinyl chloride, wax, and vinyl acetate. 3. The method for coating a panel material according to claim 1, wherein an opening is formed on a non-painted surface of the panel material.