JP2016187777A - Coating method of vehicle exterior member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating method of a vehicle exterior member capable of reducing a coating space, and also improving coating quality.SOLUTION: When supporting a vehicle exterior member 3 by a jig 2, the vehicle exterior member 3 is allowed to have an inclined attitude or an erected attitude in the vertical direction so that the largest area part of a coating object surface 33 is faced obliquely upward or faced to a horizontal direction. Further, when applying spray coating to the coating object surface 33, coating is applied so that a coating area is widened from a lower side toward an upper side of the coating object surface 33.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method for coating a vehicle exterior member.
Here, the “vehicle exterior member” in the present invention is a member that is exposed to and attached to the outside of the vehicle and is visible from the outside, among the structural members of a vehicle such as an automobile. Specific examples include bumpers and fenders. Panels, hoods, etc. are listed.

  For example, when painting a bumper of an automobile, means for supporting the bumper on a jig and spraying paint from a painting gun is used (see, for example, FIG. 3 of Patent Document 1). In this case, in the past, the actual situation was that the bumper was supported in a horizontal position on the jig so that the front portion of the bumper was facing upward. For this reason, the width | variety of a bumper was bulky and the malfunction that the width | variety of the whole painting booth became large had arisen.

  5 and 6 show specific examples. In these drawings, a conveyor 1 having jigs 8 is provided in a painting booth 6, and painting robots 7 are arranged on both sides thereof. Two bumpers 3 are supported side by side on the pair of jigs 8. In FIG. 5, the longitudinal direction of the bumpers 3 coincides with the conveyor conveyance direction. In FIG. 6, the short direction of the bumper 3 is set to coincide with the conveyor conveyance direction. In any case, since the bumper 3 is in a horizontal posture, the widths Wa ′ and Wb ′ are large. For this reason, the so-called conveyance width of the bumper 3 is also increased. As a result, the overall width W1, W2 of the painting booth 6 is also increased. This is not very preferable for promoting space saving, and increases the cost of the painting equipment.

  As a means for solving the above-described problems, it can be considered that the bumper 3 is supported by the jig 8 in an oblique posture. However, simply adopting such means causes a problem that coating quality tends to deteriorate due to coating dust (spray dust) generated during spray coating (details will be described later).

JP 2011-25153 A

  The present invention has been conceived under the circumstances as described above, and provides a coating method for a vehicle exterior member capable of reducing the coating space and improving the coating quality. Is the issue.

  In order to solve the above problems, the present invention takes the following technical means.

The vehicle exterior member coating method provided by the present invention is a method of supporting a vehicle exterior member with a jig and spraying the surface of the vehicle exterior member to be painted, and applying the vehicle exterior member to the jig. When supporting, the vehicle exterior member is tilted or vertically upright so that the maximum area of the surface to be coated is obliquely upward or horizontally, and the surface to be painted is placed on the surface to be painted. When spray coating is performed, it is characterized in that the coating is performed so as to expand the coating area upward from the lower side to the upper side of the surface to be coated.

According to such a configuration, the following effects can be obtained.
1stly, since the attitude | position at the time of supporting a vehicle exterior member to a jig is set to the attitude | position which stood up in the inclination or the vertical direction instead of horizontal, the width | variety of the vehicle exterior member in a horizontal direction can be made small. As a result, the overall width of the painting equipment such as the painting booth can be reduced by that much, and the space for painting equipment can be saved and the equipment cost can be reduced. It is also possible to reduce the operating cost of the painting equipment.
Second, it is possible to reduce the influence of coating dust and improve the quality of coating. That is, when spray painting is performed with the vehicle exterior member's painting target surface facing diagonally upward or horizontally, most of the paint dust floating in the air falls downward due to gravity (in the painting booth). In general, a downflow airflow is generated, but the coating dust also drops due to this airflow) .Therefore, in the surface to be painted, the area below the sprayed part is applied. Many dusts are likely to adhere. On the other hand, in the present invention, since the coating area is expanded upward from the lower side to the upper side of the surface to be painted, most of the coating dust adheres to the painted area, and the wet paint Can be used to blend paint dust. When paint dust adheres to the unpainted area of the vehicle exterior member, the surface becomes rough and uneven, and if the paint is applied from there, the quality of the paint deteriorates. On the other hand, according to the present invention, such a situation can be appropriately avoided, the quality of painting can be improved, and the appearance of the painted surface can be improved.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

An example of the coating method of the vehicle exterior member which concerns on this invention is shown, (a) is a perspective view of the state which supported the bumper on the jig, (b) is the front sectional drawing, (c) is It is explanatory drawing of a paint spraying order. It is explanatory drawing which shows the other example of the paint spraying order with respect to the bumper supported by the state shown in FIG. The other example of this invention is shown, (a) is a perspective view of the state which supported the bumper in the jig, (b) is the front sectional drawing, (c) is a paint spraying order. It is explanatory drawing. It is explanatory drawing which shows the other example of the paint spraying order with respect to the bumper supported by the state shown in FIG. An example of a prior art is shown, (a) is a schematic plan explanatory drawing, (b) is VV sectional drawing of (a). The other example of a prior art is shown, (a) is a schematic plane explanatory drawing, (b) is VI-VI sectional drawing of (a).

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  In the embodiment shown in FIG. 1, two bumpers 3 for a vehicle are hooked and held in a pair of jigs 2 attached to a conveyor 1 conveyed in the direction of arrow Fr in the painting booth. . The painting booth has the same configuration as that shown in FIGS. 5 and 6, for example. In FIG. 1, the code | symbol 30 is a hole provided in the front part 31 (front part at the time of mounting | wearing to a vehicle) of the bumper 3. As shown in FIG.

The bumper 3 has a front portion 31 and side portions 32 connected to both sides in the longitudinal direction, and these are the coating target surfaces 33. The bumper 3 is set to an inclined posture in which the front portion 31 having the largest area of the painting target surface 33 is obliquely upward. In this inclined posture, the longitudinal direction of the bumper 3 is not inclined up and down, is substantially horizontal, and the lateral direction is inclined up and down. The jig 2 has a shape that can stably support the bumper 3 in such a state.

  When spray coating is performed on the bumper 3 using the coating gun 4, the coating is sequentially sprayed over the entire area to be coated 33 along the locus indicated by the arrow line D <b> 1 in FIG. This spraying is performed by raising and lowering the coating gun 4 so as to face the bumper 3 along the short direction of the bumper 3, but when raising the coating gun 4 from the lower end facing position of the bumper 3 to the upper end facing position. Only the spraying of paint from the coating gun 4 is turned on. When the coating gun 4 is lowered from the position facing the upper end of the bumper 3 to the position facing the lower end, the spray of paint is turned off. Each time when the painting gun 4 is moved up and down once, the position of the painting gun 4 is displaced in the longitudinal direction of the bumper 3, and the entire surface of the painting target surface 33 is painted by repeating the above-described spray coating.

  According to this embodiment, since the bumper 3 is inclined and supported, the horizontal width Wa of the bumper 3 can be reduced. For this reason, it is possible to reduce the width of the painting booth, and it is possible to save space for painting equipment and reduce equipment costs.

  When spray coating is performed with the bumper 3 tilted, most of the coating dust falls below the coating area due to gravity. When a downflow airflow is generated in the coating booth, the coating dust also falls below the coating area due to this airflow. On the other hand, in the present embodiment, a coating film that has been applied immediately before and is still wet exists below the region where the coating is sprayed and the coating is actually applied. For this reason, most of the paint dust adheres to the wet paint film, but if the paint film is wet, the paint dust is easy to become familiar with the paint and the surface of the paint film is not rough and uneven. It is possible. Unlike this embodiment, for example, when spray coating is advanced from the upper side to the lower side of the bumper 3, a lot of coating dust adheres to the unpainted area below the painted area, resulting in rough irregularities. Solidify. Even if the coating is applied from above, the above-mentioned coating dust does not become familiar with the coating, and the surface of the coating film becomes rough. In the present embodiment, such a situation can be appropriately avoided and the appearance of the painted surface can be improved.

  2 to 4 show other embodiments of the present invention. In these drawings, elements that are the same as or similar to those in the above embodiment are given the same reference numerals.

In the embodiment shown in FIG. 2, the paint is sequentially sprayed over the entire area to be painted 33 along the locus shown by the arrow line D <b> 2 with respect to the bumper 3 set in the inclined posture similar to FIG. 1. This spraying is performed while the coating gun 4 is opposed to the bumper 3 and operated in a substantially horizontal direction along the longitudinal direction of the bumper 3, but the lower end region of the bumper 3 is first painted, and thereafter gradually This is performed so as to widen the coating area toward the upper end of the bumper 3.
Also in this embodiment, it is possible to obtain the same effect as that of the embodiment shown in FIG.

  In the embodiment shown in FIGS. 3A and 3B, the bumper 3 is set in a posture in which the longitudinal direction is inclined up and down. For this reason, the shape of the jig 2 is different from that in FIG. Also in the present embodiment, it is possible to reduce the horizontal width Wb of the bumper 3 and favorably save space for painting equipment such as a painting booth.

In the mounting posture of the bumper 3 as shown in FIGS. 3 (a) and 3 (b), for example, the paint is sequentially sprayed over the entire area to be painted 33 along the locus shown by the arrow line D3 in FIG. 3 (c). Go. The manner of painting is the same as that described with reference to FIG. 1C, and only when the painting gun 4 is raised from the position opposed to the lower end of the bumper 3 to the position opposed to the upper end, the coating gun 4 When the spray of paint is turned on and the paint gun 4 is lowered from the position facing the upper end of the bumper 3 to the position facing the lower end, the spray of paint is turned off. Each time the painting gun 4 is moved up and down once, the position of the painting gun 4 is shifted in the short direction of the bumper 3 and the spray coating in the above-described manner is repeated. Therefore, similarly to the description of the coating method of FIG. 1C, it is possible to suppress the influence of the coating dust and improve the quality of the coating.

  In the embodiment shown in FIG. 4, the paint is sequentially sprayed over the entire area to be painted 33 along the locus shown by the arrow D <b> 4 on the bumper 3 in the inclined posture shown in FIG. 3. The method of painting is the same as the method of painting described with reference to FIG. 2, and it is possible to paint with good quality while suppressing the influence of coating dust.

  Although illustration is omitted, in the present invention, the inclined posture of the bumper 3 shown in FIGS. 1A and 1B and the inclined posture of the bumper 3 shown in FIGS. 3A and 3B are inclined. It is also possible to make the bumper 3 stand upright in the vertical direction so that the angle is further increased and the front portion 31 of the bumper 3 faces the horizontal direction. When the bumper 3 is erected in this way, the horizontal width of the bumper 3 can be minimized.

  The present invention is not limited to the contents of the above-described embodiment. The specific structure of each process of the coating method of the vehicle exterior member according to the present invention can be changed within the scope intended by the present invention.

  When a painting robot is arranged in the painting booth, the painting robot may be arranged only on one side of the conveyance path instead of being arranged on both sides of the conveyance path of the vehicle exterior member. According to such a configuration, it is possible to further reduce the width of the entire painting booth.

The vehicle exterior member is painted with a multi-layer structure such as a primer layer, a base layer, and a clear layer, and a plurality of painting operations are performed. For this reason, it is desirable to apply the coating method according to the present invention in all these painting operations. However, the painting referred to in the present invention does not ask the specific type of coating film obtained by this painting. Therefore, even if only one of the respective coatings of the primer layer, the base layer, and the clear layer, or only the coating intended by the present invention is used for two coatings, the present invention Is included in the technical scope of
The concept of the vehicle exterior member in the present invention is as described at the beginning and is not limited to the bumper.

2 Jig 3 Bumper (vehicle exterior member)
33 Paint target surface 4 Paint gun

Claims (1)

A method of supporting a vehicle exterior member with a jig and spraying the surface of the vehicle exterior member to be painted,
When the vehicle exterior member is supported by the jig, the vehicle exterior member is erected in an inclined posture or a vertical direction so that a maximum area portion of the surface to be painted faces obliquely upward or horizontally. With posture,
When applying the spray coating to the surface to be painted, the coating of the vehicle exterior member is performed such that the coating area is expanded upward from the lower side to the upper side of the surface to be painted Method.

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