JPS6239019B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating masking jig used for applying multicolor coating to the body of an automobile, for example, and a method for manufacturing the same.

2. Description of the Related Art When applying multicolor coating to objects to be painted such as doors and fenders of a vehicle body in the manufacturing process of an automobile, the unpainted portions are generally covered with a masking jig or the like. Figures 1 and 2 show the relationship between the conventional masking jig and the object to be painted.
2 is a door panel as an object to be painted, and 2 is a masking jig attached to the door panel 1. This masking jig 2 consists of a masking paper 3 along a curved masking part 1b of a surface 1a of a door panel 1, and a parting sheet attached to side edges 3a, 3a that are part of the peripheral edge of this masking paper 3. tape 4,4
and paper holding tapes 5, 5 which press the side edges 3a, 3a of the masking paper 3 against the parting tapes 4, 4. Note that double-sided adhesive tape is used for the parting tapes 4, 4.

By the way, in order to paint the part to be painted 1c of the door panel 1 using such a masking jig 2,
First, a parting positioning jig (not shown) is set on the surface 1a of the door panel 1, and parting tapes 4, 4 are attached to the surface 1a along the parting positioning jig.
Next, the masking paper 3 is bent along the masking part 1b, and after pasting the side edges 3a, 3a of the masking paper 3 to the parting tapes 4, 4, the side edges 3a, 3a and the parting tape 4 are attached. , 4, and paste the paper press tapes 5, 5 on them. After the masking part 1b is covered with the masking jig 2 in this way, the part to be painted 1c can be painted in a predetermined color by spraying the paint atomized by the coating device onto the part to be painted 1c.

However, conventionally, as described above, a large number of steps were required to attach the masking jig 2 to the masking portion 1b. Furthermore, since the masking paper 3 has some elasticity, the masking paper 3 rises from the bent corner 1d of the masking part 1b, creating a gap 6 between the masking paper 3 and the corner 1d. There was a risk that atomized paint would enter the area by blowing. Moreover, since the main body of the masking jig 2 is made of paper, it wrinkles or tears after one use, making it impossible to use it again, which is expensive.

Therefore, the first invention provides a rigid masking plate along the masking part of the object to be painted, and attaches one side edge of a thin piece of parting tape to the rigid masking plate along the peripheral edge. By using a masking jig that protrudes from the periphery of the rigid masking plate along the other edge of the parting tape, it can be applied to the masking part with one touch, without the need for multiple steps as in conventional methods. It is characterized by the fact that it can be easily attached, that no gap is created between the masking part and the corner part, and that it can be reused many times.

Further, the second invention is such that after pasting a thin piece of parting tape along the parting line of the object to be painted to the edge of the masking part on the surface of the object to be painted, the parting tape of the masking part is covered. At the same time, the uncured soft FRP sheet is brought into close contact with the uncured part, and the peripheral edge of the soft FRP sheet is brought into contact with the soft parting tape.
A method for manufacturing a masking jig for painting, in which the flexible FRP sheet is attached to the side edge of the FRP sheet, the flexible FRP sheet is cured to form a rigid masking plate, and the rigid masking plate and parting tape are removed from the surface of the object to be painted. By doing so, the shape allows the rigid masking plate to accurately follow the shape of the bent part or corner of the masking part, so that no gap is created between the corner and the rigid masking plate. It is characterized by:

Next, the masking jig of the present invention will be explained based on FIGS. 3 to 6.

In FIG. 3, 7 is a masking jig.
This masking jig 7 has a rigid masking plate 8 shaped to follow the curved masking portion 1b of the door panel 1, which is the object to be painted. This rigid masking plate 8 is formed from an FRP sheet with a thickness of approximately 0.5 mm to 1 mm, and is in close contact with the masking portion 1b. Note that the rigid masking plate 8 is not necessarily
It does not have to be formed from an FRP sheet, and may be formed from other materials as long as they have a certain degree of rigidity and retention.

8a, 8a are side edges as part of the peripheral edge of the rigid masking plate 8, and 9, 9 are parting tapes of the masking jig 7. One side edge of these parting tapes 9, 9 is stuck to the lower surface of the side edges 8a, 8a, and the other side edge of these parting tapes 9, 9 is attached to the side edge 8a of the rigid masking plate 8. , 8a. 9a, 9a are the protrusions of the parting tapes 9, 9. For such parting tapes 9, 9, polyester tape, aluminum foil, stainless steel foil, or the like having a thickness of approximately 40 μm is used. Moreover, the closing tape 9,
Adhesive is applied to both sides of 9. Further, the protrusion amount a of the protrusion 9a is set to about 3 to 4 mm (see FIG. 4).

The masking jig 7 having such a configuration connects the rigid masking plate 8 to the masking portion 1b of the door panel 1.
It is attached to the masking part 1b of the door panel 1 by bringing the parting tapes 9, 9 into close contact with the surface 1a of the part to be painted 1c along the parting line. After this attachment, a predetermined color of paint is applied only to the part to be painted 1c by spraying the atomized paint onto the part to be painted 1c. next,
The painting work is completed by peeling off the masking jig 7 from the masking portion 1b.

Such a masking jig 7 can be used several times,
If the parting tapes 9, 9 are replaced every few times, the number of times they can be used can be further increased.

In the embodiment described above, the parting tapes 9, 9 are coated with an adhesive, and the parting tapes 9, 9 are coated with an adhesive.
Although the masking jig 7 is attached to the masking portion 1b by attaching the masking jig 7 to the surface 1a, it is not necessarily necessary to attach the masking jig 7 to the masking portion 1b using an adhesive. For example, the masking jig 7 can be applied to the surface 1 using only static electricity.
It may be attached to the masking part 1b of a. In this case, the masking jig 7 can also be attached to the masking portion 1b using static electricity used during electrostatic coating. Further, the masking jig 7 may be attached to the masking portion 1b using this static electricity and the above-mentioned adhesive tapes 9, 9.

Next, a method for manufacturing such a masking jig 7 will be explained based on FIGS. 3 to 6.

First, a mold release agent is applied to the surface 1a of the door panel 1. Next, thin pieces of parting tape 9, 9 are attached to the edge of the masking 1b on the surface 1a along the parting line of the part to be painted 1c, as shown in FIG. Then, thick masking tapes 10 of about 0.8 mm are pasted on the parts of the parting tapes 9, 9 on the side of the part to be painted 1c and the part to be painted 1c, and the parting tapes 9,
9 on the side of the part to be painted 1c,
Used for positioning FRP sheets. Note that the masking tapes 10, 10 do not necessarily need to be used. After that, the uncured soft FRP sheet 11 is brought into close contact with the part of the masking part 1b that is not covered by the parting tapes 9, 9, and the end faces of the side edges 11a, 11a, which are the peripheral parts of the soft FRP sheet 11, are masked. The side edges 11a, 11a of the tape 9 are brought into contact with the tape 10 as shown in FIG.
9 on the soft FRP sheet 11 side.

As the soft FRP sheet 11, a sheet in which glass fibers are impregnated with unsaturated polyester on site or an ultraviolet curable prepreg sheet is used. When a sheet made of glass fibers impregnated with unsaturated polyester is used as the soft FRP sheet 11, when the soft FRP sheet 11 has been cured to a certain extent, the masking tapes 10, 10 are peeled off and the soft FRP sheet 11 is When the sheet 11 is completely cured and becomes the rigid masking plate 8, the rigid masking plate 11 and the parting tape 9,
Peel off 9 from door panel 1. As a result, the masking jig 7 consisting of the parting tapes 9, 9 and the rigid masking plate 8 as shown in FIG. 3 is completed.

In addition, we have made UV-curable prepreg sheets into soft
When used as the FRP sheet 11, after the soft FRP sheet 11 is irradiated with ultraviolet rays and cured to form a rigid masking plate 8, the masking tapes 10, 1
0, and then peel off the parting tapes 9, 9 and the rigid masking plate 8 from the door panel 1, thereby completing the masking jig 7 consisting of the parting tapes 9, 9 and the rigid masking plate 8.

Note that such a rigid masking plate 8 is made according to the shape of the parting line, and has a thickness of 0.5
Since it is formed as thin as ~1.0 mm, it fits well to the masking part 1b. Further, the reason why the parting tapes 9, 9 are provided on the side edges 11a, 11a of the rigid masking plate 11 is to make the seal more complete and to prevent paint from accumulating on the end faces of the side edges 11a, 11a. It is in.

As explained above, the first invention provides a rigid masking plate along the masking portion of the object to be painted, and attaches a thin piece of parting tape to one side edge of the rigid masking plate along the peripheral edge. At the same time, a masking jig is provided that protrudes from the peripheral edge of the rigid masking plate along the other edge of the parting tape, so masking can be done with one touch without requiring many steps as in the past. It can be attached to the
There is no gap between the masking part and the corners, and it can be reused many times.

Further, the second invention is such that after pasting a thin piece of parting tape along the parting line of the part to be painted to the edge of the masking part on the surface of the object to be painted, the parting tape of the masking part is covered. At the same time, the uncured soft FRP sheet is brought into close contact with the uncured part, and the peripheral edge of the soft FRP sheet is brought into contact with the soft parting tape.
A method for manufacturing a masking jig for painting, in which the flexible FRP sheet is attached to the side edge of the FRP sheet, the flexible FRP sheet is cured to form a rigid masking plate, and the rigid masking plate and parting tape are removed from the surface of the object to be painted. Therefore, the shape of the rigid masking plate is such that the rigid masking plate can accurately follow the shape of the bent portion or the corner of the masking portion, and it is possible to prevent a gap from forming between the corner and the rigid masking plate.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view showing the relationship between the door panel and a conventional masking jig, FIG. 2 is a partial sectional view showing the relationship between the door panel in FIG. 1 and the masking jig, and FIG. FIG. 4 is a perspective view showing the relationship between the masking jig and the door panel, FIG. 4 is a partial sectional view showing the relationship between the door panel and the masking jig in FIG. 3, and FIGS. 5 and 6 are views of the masking jig of the present invention. It is a sectional view showing a manufacturing method. 1... Door panel (object to be painted), 1a... Surface, 1b... Masking part, 1c... Part to be painted,
7... Masking jig, 8... Rigid masking plate, 8a, 8a... Side edge (part of peripheral edge),
9...Parting tape, 9a...Protrusion, 10...Masking tape, 11...Soft FRP sheet, 1
1a, 11a... side edge (part of the peripheral edge).

Claims (1)

[Scope of Claims] 1. A rigid masking plate is provided that follows the shape of the masking part of the object to be painted, and one side edge of a thin piece of parting tape is pasted along the peripheral edge of the rigid masking plate, and the parting tape is attached to one side of the rigid masking plate along the peripheral edge. A masking jig for painting, characterized in that the other edge of the tape protrudes from the peripheral edge of a rigid masking plate along the parting line. 2. After applying a thin piece of parting tape to the edge of the masking part on the surface of the object to be painted along the parting line of the part to be painted, apply uncured parting tape to the part of the masking part that is not covered by the parting tape. At the same time, the soft FRP sheet is closely attached, and the peripheral edge of the soft FRP sheet is attached to the side edge of the soft FRP sheet of the parting tape, and then the soft FRP sheet is hardened to form a rigid masking plate, and then the rigid A method for manufacturing a masking jig for painting, characterized by peeling off a masking plate and a parting tape from the surface of an object to be painted.