JPH05277407A - Bumper painting method and masking device for painting - Google Patents

Abstract

PURPOSE:To provide a bumper painting method and a masking device for painting that can shorten working hours and realize the enhancement of quality. CONSTITUTION:The sheet cutting blade 36 corresponding to the parting line of the painting part and non-painting part of a bumper B is used and the bumper B is pressed to the cutting blade 36 through a masking sheet M having an adhesive surface on the side of the bumper B not only to bond the masking sheet M to the bumper B but also to cut the masking sheet M along the parting line and, then, the masking sheet M of the painting part is removed to apply painting to the painting part and, thereafter, the masking sheet M of the non- painting part is removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bumper coating method and a masking device for coating used when partially coating a vehicle bumper.

[0002]

2. Description of the Related Art Conventionally, when partially coating a bumper for a vehicle, a coating gun is used to apply a stripping paint for masking to a non-painted portion so that it is wider than this. After drying and curing, the strippable paint is cut along the parting line between the unpainted part and the painted part by a laser gun device attached to the robot. Then, after removing the strippable paint adhering to the painted part, paint is applied to the painted part and baked and dried, and finally the strippable paint on the non-painted part is removed. Was trying to get.

The bumper coating method as described above is described in, for example, JP-A-60-227867.

[0004]

However, in the conventional bumper coating method as described above, since there is a step of applying a strippable paint for masking and a step of drying and curing this paint, the entire work is time-consuming. It was such a thing. Further, it is difficult to apply the strippable paint uniformly, and especially the starting portion of the coating becomes thin and peeling becomes difficult. It may take an extra working time to remove it, and the working time is shortened. It was desired to improve the above.

Further, conventionally, when the stripperable paint is cut along a parting line with a laser gun device, it is easily affected by the straight-ahead performance of a robot holding the laser gun device, so that the parting line has fine irregularities. In some cases, it is difficult to ensure the quality of the parting line, and improvement has been desired in order to improve the quality.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and a bumper coating method and coating method capable of reducing working time and improving quality. The purpose is to provide a masking device.

[0007]

A bumper coating method according to the present invention is a method for partially coating a vehicle bumper.
Using a sheet cutting edge corresponding to the parting line between the painted part and the non-painted part of the bumper, pressing the bumper against a masking sheet having the bumper side as an adhesive surface, and cutting the bumper through the masking sheet A masking sheet on the bumper and cut the masking sheet along the parting line, then remove the masking sheet in the painted part, and after painting the painted part, the masking sheet in the unpainted part Is removed, and the above configuration is used as a means for solving the problem.

Further, the coating masking device according to the present invention is a sheet feeding mechanism in which a masking sheet having a concave shape corresponding to the outer shape of a vehicle bumper and an adhesive surface on the anti-concave side is projected to the concave opening portion. And a handling mechanism for holding the bumper and pressing it into the concave mold, the concave mold having an elastic body for receiving the bumper on its inner surface, and corresponding to the parting line between the painted part and the non-painted part of the bumper and The sheet cutting blade is provided with the blade tip located inside the inner surface of the mold of the elastic body, and the above-described configuration is used as a means for solving the problems.

[0009]

According to the bumper coating method of the present invention,
Using a sheet cutting edge that corresponds to the parting line between the painted part and the non-painted part of the bumper, press the bumper against the cutting edge via the masking sheet with the bumper side as the adhesive surface to attach the masking sheet to the bumper. Since the masking sheet is cut off along the parting line when it is attached, the masking work for the non-painted portion is continuously performed, whereby the working time is shortened.

Further, in the coating masking apparatus according to the present invention, the masking sheet having the anti-concave mold side as the adhesive surface is projected to the concave opening part by the sheet feeding mechanism,
When the bumper held by the handling mechanism is pressed into the concave mold while pressing it against the adhesive surface of the masking sheet, in the concave mold, the masking sheet is attached to the bumper and the elastic body receiving the bumper is compressed. The masking sheet is cut with the sheet cutting blade along the parting line, and the masking work for the unpainted portion is continuously performed.

Further, in the above-described bumper coating method and coating masking device, the masking sheet is accurately cut at the parting line by using the sheet cutting edge corresponding to the parting line between the painted part and the unpainted part of the bumper. And ensure its quality.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1 to 4, the masking device for coating comprises a mold main body 2 provided on a base 1 and a frame 3.
Each functional part is formed between the functional plate and the upper plate 4 provided on the lower surface of the, and the masking sheet M is used to mask both sides of the synthetic resin bumper B in the longitudinal direction (vehicle left-right direction). Therefore, the bumper B is painted along the central portion in the longitudinal direction.

The mold body 2 is provided with a concave mold 5 corresponding to the outer shape of the bumper B, and one side of the concave mold 5 corresponding to the longitudinal end portion side of the bumper B (left side of the concave mold 5 in FIG. 1), It has a first step portion 6, a second step portion 7 and a first sheet holding portion 8 which become higher stepwise toward the outside of the die and has the same height as the first step portion 6 on the other side of the concave die 5. Of the third step 9 and the second sheet of the same height as the first sheet holding portion 8.
It has a sheet holding portion 10.

On the outside of the die of the first sheet holding portion 8,
It has a fourth step portion 11 and a fifth step portion 12 which are lowered stepwise. Further, on both sides (the left and right sides of the recessed die 5 in FIG. 2) of the early recessed die 5 corresponding to both sides in the longitudinal direction of the bumper B, the sixth to ninth step portions 13 to 16 are lowered stepwise.
Have symmetrically.

At the first step portion 6 and the third step portion 9, sticking cylinders 18 and 18 for driving the end sticking rollers 17 and 17 toward and away from the concave die 5 are provided rotatably, respectively. is there. These end sticking rollers 17, 17 are
Holding cylinders 19, 19 attached to the upper plate 4
They are paired with the end pressing rollers 20 and 20 which are driven up and down by.

The second step portion 7 is provided with two lower holding rollers 21 and 21 and a lower blade 22 located between them. The lower holding rollers 21 and 21 are respectively paired with upper holding rollers 24 and 24 which are driven up and down by holding cylinders 23 and 23 attached to the upper plate 4, and the lower blade 22 is the same. It is paired with an upper blade 26 that is driven up and down by a cutter cylinder 25 attached to the upper plate 4.

A roll-shaped masking sheet M is provided on the fifth step portion 12 together with a holding device 27 for the roll sheet. On the fourth step portion 11, a pair of upper and lower feed rollers 28,
28 is provided together with the bracket 56, and the masking sheet M pulled out from the holding device 27 is sent to the concave die 5 side.

The sixth and eighth step portions 13 and 15 include
Sticking cylinders 30 and 30 for driving the side sticking rollers 29 and 29 toward and away from the concave mold 5 are provided rotatably. Further, one ends of arms 31 and 31 bent in a substantially L-shape are rotatably attached to the side portions of the sixth and eighth step portions 13 and 15, and the other ends of the arms 31 and 31 are arranged. , Side pressing rollers 32, 32 forming a pair with the side attaching rollers 29, 29 are attached to the respective side attaching rollers 29, 29, and the arm 31 and the side are attached to the seventh and ninth step portions 14, 16, respectively. Side pressing cylinders 33, 33 for swinging the pressing roller 32 are rotatably provided. The side attaching roller 29, the side holding cylinder 33, and the like are provided at a plurality of positions in the longitudinal direction of the bumper B.

The concave mold 5 is constructed on the basis of the hollow portion 34 formed in the mold body 2, and has a constant thickness on both inner sides of the hollow portion 34 corresponding to the unpainted portion of the bumper B. The mat-shaped elastic bodies 35, 35 are provided,
At the center of the hollow portion 34, sheet cutting blades 36, 36 corresponding to the parting line between the coated portion and the non-coated portion of the bumper B are provided. In this embodiment, since the coating part is located at the center of the bumper B, two cutting edges are provided corresponding to the two parting lines. Both cutting blades 36 are provided on a cutting blade plate 38 that is elastically held by a plurality of springs 37, and the cutting edge is positioned inside (below) the inner surface of the mold of the elastic body 35. It is kept.

Further, in the lower central portion of the hollow portion 34, sheet removing cylinders 39 are erected at a plurality of positions, and the sheet removing cylinders 39 are used for the cutting blade plate 3
The sheet removing vacuum cup 41 is driven up and down through the opening 40 of FIG.

Further, on the upper plate 4, a sheet feeding mechanism 42 is provided in which a masking sheet M having an anti-concave mold side (upper surface side) as an adhesive surface is projected to the opening portion of the concave mold 5.
A handling mechanism 43 for holding the bumper B and pressing it into the concave mold 5 is provided. Here, the masking sheet M does not have an adhesive applied to the entire surface on the anti-concave side, and in particular, as shown in FIG. 3, the masking sheet M is adhered to a portion corresponding to two central parting lines and both side portions. A section S is provided.

The sheet feeding mechanism 42 is provided symmetrically on both sides with respect to the sheet feeding direction which is the right direction in FIG. The sheet feeding mechanism 42 includes the upper plate 4
On a holding plate 44 that is vertically provided on the side of the sheet, a drive unit 46 that drives a drive rod 45 in the sheet feeding direction, and a plurality of guide rollers 4 that also guide a guide bar 47 in the sheet feeding direction.
8, the sheet feeding cylinder 57 is vertically attached to the tip ends of the drive rod 45 and the guide bar 47, and the sheet feeding cylinder 57 drives the sheet suction vacuum cup 49 up and down. ..

In the sheet feeding mechanism 42, the sheet feeding cylinder 48 and the cylinders of the upper plate 4 are prevented from interfering with each other during sheet feeding, and the sheet suction vacuum cup 49 is provided on the masking sheet M. For the convenience of corresponding to the portion between the adhesive portions S, the rod of the sheet supply cylinder 48 is bent as shown in FIG.

The handling mechanism 43 fixes a pair of guides 50, 50 extending in a direction orthogonal to the preceding sheet feeding direction to the lower surface of the upper plate, and these guides 50, 50 fix the slide plate 51. Both ends are slidably held, and two handling cylinders 52, 52 are vertically provided on the slide plate 51, and each handling cylinder 52 drives a vacuum cup 53 for adsorbing a bumper up and down. ing.

The handling mechanism 43 is provided with a slide plate driving device and the like in addition to the above-mentioned structure, and the stop position of the bumper sent from the previous step, the concave die 5, and the next step in the right direction of FIG. Bumper B is transported between the two. Further, the bumper B is carried by the belt conveyor 54 from the previous process and received by the positioning block 55. In addition, each cylinder in the above configuration, for example,
An air cylinder is used.

Next, the bumper coating method of the present invention will be described together with the operation of the coating masking device.

First, in the coating masking apparatus, the upper end pressing roller 20 and the upper holding roller 24 are shown in FIG.
2, the side pressing roller 32 is in the avoiding position shown in phantom in FIG. 2, and the cylinder 52 of the handling mechanism 43 is in the bumper receiving position shown in phantom in FIG. In position.

Next, the masking device for painting is the mold body 2
After sucking the masking sheet M with the sheet suction vacuum cup 49 on the first sheet holding portion 8 of
By driving the drive rod 45 to extend, the sheet suction vacuum cup 49 is moved to a position above the second sheet holding portion 10 while pulling out the masking sheet M. Then, after the front end of the masking sheet M is pressed on the second sheet holding portion 10, the end pressing rollers 20, 20 on both end sides are lowered, and these rollers and each end sticking roller 17, By sandwiching the masking sheet M from above and below with 17, the masking sheet M is projected to the opening portion of the concave mold 5.

After the masking sheet M is set, the upper holding rollers 24, 24 are lowered to hold the pulling-out side portion of the masking sheet M between the lower holding rollers 21 and 21. The upper blade 26 is lowered to cut the masking sheet M between itself and the lower blade 22, and the sheet suction vacuum cup 49 separated from the masking sheet M is returned to a position above the first sheet holding portion 8.

Next, the coating masking device moves the bumper suction vacuum cup 53 in the handling mechanism 43 up and down, and moves the slide plate 51 so that the bumper B received by the positioning block 55 reaches the upper side of the recess 5. After the movement, the handling cylinder 52 is extended to drive the bumper B into the concave mold 5 while pressing the bumper B against the masking sheet M, as shown in FIGS. 2 and 5.

At this time, the side pressing rollers 32, 32 are rotated to the concave mold 5 side to sandwich both sides of the masking sheet M between these rollers and the side attaching rollers 29, 29. The entire circumference of the masking sheet M is sandwiched together with the pressing roller 20 and the sticking roller 17 at both ends which sandwich the masking sheet first to prevent extra wrinkles from occurring in the masking sheet M and The amount of inflow to the concave die 5 side while adjusting the amount of inflow to the concave die 5 side.
The masking sheet M is brought into contact with the edge portion of the bumper B.

In the coating masking device, when the bumper B is further lowered and pressed into the concave mold 5, the masking sheet M is attached to the bumper B, and as shown in FIG.
As shown in FIG. 5, as the mat-shaped elastic bodies 35, 35 are compressed, the bumper B is pressed against the cutting blades 36, 36 via the masking sheet M, and the coated portion and the uncoated portion are separated from each other. The cutting edge 36 provided along the parting line,
The masking sheet M is cut by 36.

At this time, the coating masking device is
Since the plate 38 of the cutting blade 36 is supported by the spring 37, the cutting blade 3 is not subjected to a force larger than that required for cutting.
6 is pushed down so as not to damage the bumper B.

After this, the masking device for painting is shown in FIG.
As indicated by an imaginary line in the inside, the sheet removing vacuum cup 41 is lifted to be adsorbed to the central portion of the bumper,
Then, as shown in FIG. 7, by raising the bumper B together with the bumper suction vacuum cup 53,
Peel off the masking sheet m of the painted part, which is the center part of the bumper, from the bumper B.

The bumper B thus taken out from the coating masking device is in a state in which the non-coating portions on both sides of the bumper B are masked by the masking sheet M, and a predetermined coating is applied to the coating portion in the next step. After that, the masking sheet M is removed to complete the partial coating.

Here, the process of performing partial coating will be described with reference to FIG. 8. Next, as shown in (B), the masking sheet M is attached to the molded bumper B shown in (A). Then, as shown in (C), the masking sheet M is cut along the parting line L, and as shown in (D), after removing the masking sheet M in the central coated portion,
As shown in (E), paint is applied to the coating part, and finally (F)
As shown in (3), the masking sheets M on the unpainted portions on both sides are removed to obtain a partially-coated bumper B.

That is, in the bumper coating method of the present invention,
The steps (B) and (C) are continuously performed, and the steps (B), (C) and (D) are continuously performed in the coating masking apparatus described in the above embodiment. Becomes

[0039]

As described above, according to the bumper coating method of the present invention, the masking work can be continuously performed, and the use of the cutting edge corresponding to the parting line increases the parting line. It is possible to ensure quality and obtain a partially painted bumper that is extremely good in appearance.

Further, according to the masking apparatus for painting of the present invention, the masking work can be continuously and automatically performed, and a high quality of the parting line is secured by using the cutting edge corresponding to the parting line. It is possible to contribute to the partial coating which is good in appearance.

Further, since the bumper painting method and the painting masking device perform masking continuously, they can contribute to the automation of the whole process, and compared with the conventional painting method using strippable paint. ,
It has an excellent effect that the total working time can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a coating masking device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the coating masking device shown in FIG. 1, taken along the line AA.

3 is a cross-sectional view of the coating masking device shown in FIG. 1, taken along line BB.

FIG. 4 is a cross-sectional view of the coating masking device shown in FIG. 1, taken along the line C-C.

FIG. 5 is a cross-sectional view showing a state where the bumper is lowered into the concave mold.

6 is a cross-sectional view showing a state in which the bumper is further lowered from the state of FIG. 5 to cut the masking sheet.

FIG. 7 is a cross-sectional view showing a state in which the bumper is lifted from the state of FIG. 6 to remove the masking sheet of the coating portion.

FIG. 8 is a perspective view for explaining a process of partially coating the bumper.

[Explanation of symbols]

 B Bumper M Masking sheet 5 Recessed type 35 Elastic body 36 Cutting edge for sheet 42 Sheet supply mechanism 43 Handling mechanism

Claims (2)

[Claims] 1. When partially coating a vehicle bumper,
Using a sheet cutting edge corresponding to the parting line between the painted part and the non-painted part of the bumper, pressing the bumper against a masking sheet having the bumper side as an adhesive surface, and cutting the bumper through the masking sheet A masking sheet on the bumper and cut the masking sheet along the parting line, then remove the masking sheet in the painted part, and after painting the painted part, the masking sheet in the unpainted part A bumper coating method characterized by removing the. 2. A concave mold corresponding to the outer shape of a vehicle bumper, a sheet feeding mechanism for projecting a masking sheet having an anti-concave mold side as an adhesive surface to an opening of the concave mold, and a bumper held in the concave mold. With a handling mechanism for pressing, the concave mold is provided with an elastic body for receiving a bumper on its inner surface, and corresponds to the parting line between the painted part and the unpainted part of the bumper and is located inside the mold inner surface. A masking device for painting, characterized in that it is provided with a cutting blade for a sheet in which a cutting edge is located.