JPH10156278A - Repairing method for fine dimple of car outer plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To repair fine dimples formed on an outer plate without sheet metal- working and without removing a car body from the coating line in the coating process for a car. SOLUTION: When an outer plate 1 for which the prime coating is completed is inspected visually, and a dimple is found, a stock solution 5 for an intercoating material before being diluted with a solution is filled in the dimple by the touching-up, and dried and cured by utilizing the sealer drying process following the above-referred process. Then an intercoating material 6 swelling from the dimple is ground by a waterproof paper to form a surface on the same level as the surface of a prime coated film 2 all around, and then the intercoated film and a top coated film are formed on the surface. Not only the dimple can be repaired without the sheet metal working, but also the repair can be carried out without removing a car body from a manufacturing line by the arrangement.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing minute dimples formed on an outer plate without performing sheet metal processing in a painting process of an automobile.

[0002]

2. Description of the Related Art The coating of an outer panel of an automobile is provided with three steps of an undercoating step, an intermediate coating step and an overcoating step, and a sealer is further applied and dried between the undercoating step and the intermediate coating step. .

[0003] By the way, in the pressing step or the welding step, the outer plate of the automobile may come into contact with other objects to form minute dimples (dents). It needs to be repaired at any stage.

FIGS. 3 and 4 show a conventional painting process including dimple repair.

[0005] First, when a dimple is found by visually inspecting the outer plate after completion of the undercoating (state in which the undercoating film 2 is formed on the base material 1) (see FIG. 3A), the back surface of the base material 1 is detected. The dimple portion is slightly protruded toward the surface of the base material 1 by performing sheet metal processing from the side (see FIG. 3B). Then, the undercoat film 2 of the dimple portion slightly protrudes to the surface side of the base material 1, so that the projecting portion of the undercoat film 2 is sharpened to be flush with the surface of the surrounding undercoat film 2 (FIG. 3). (C)). Subsequently, the finished undercoat film 2 is visually inspected (see FIG. 3 (D)), and if there is no abnormality, an intermediate coat is applied on the undercoat film 2 and the intermediate coat 3 is removed. Then, a top coat is applied on the intermediate coat 3 to form a top coat 4 to complete the coating (see FIG. 3F).

[0006]

However, when dimples are repaired by the above-described conventional method, not only a lot of time and labor is required due to the necessity of sheet metal working, but also the repair is performed by removing the vehicle body from the painting line. After that, it is necessary to return to the painting line again, so that there is a problem that the flow order of the vehicle bodies is changed and the production plan is hindered. Further, the dimples are apt to occur in the hemming portion of the vehicle body outer plate, and the hemming portion may not be able to cope with the difficulty in performing sheet metal working from the inside.

The present invention has been made in view of the above circumstances, and provides a method for repairing minute dimples on an automobile outer panel, which is capable of repairing dimples without performing sheet metal working and without removing a vehicle body from a painting line. The purpose is to provide.

[0008]

According to the first aspect of the present invention, at the stage when the undercoating is completed, the repairing paint composed of the undiluted solution of the middlecoating paint is supplemented to the fine dimples formed on the outer plate. Subsequently, application of a sealer and drying of the sealer are performed. In the drying step of the sealer, the repair paint is simultaneously dried. Subsequently, the surface of the repair paint raised from the undercoat surface is sharpened flush with the undercoat surface, and an intermediate coat and an overcoat are applied thereon. As a result, it is not necessary to perform sheet metal processing, and since the repair paint can be dried by using the drying process of the sealer, the dimple can be repaired without removing the vehicle body from the painting line. Further, since the dents of the undercoat film are filled with the undiluted solution of the intermediate coating material, the intermediate coating material to be applied thereon has good adaptability and a good finish can be obtained.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below based on the embodiments of the present invention shown in FIGS.

When the dimple is found by visually inspecting the outer plate after the undercoating (see FIG. 1 (A)), the undiluted portion is supplemented with a stock solution 5 of the intermediate coating paint before being diluted with a solvent (FIG. 1 (A)). B)). This replenishment operation can be performed, for example, by touching up with the brush 5 containing the stock solution 5 of the intermediate coating paint. Subsequently, the application of the sealer and the drying of the sealer by an oven are performed. In the drying step of the sealer, the drying of the stock solution 5 of the intermediate coating material is simultaneously completed. The dried intermediate coating 6 rises from the dimples, and in the next step, the raised intermediate coating 6 is ground with water-resistant paper to remove the surrounding undercoat 2.
(See FIG. 1C). Subsequently, the finish of the finished intermediate coating 6 is visually inspected (see FIG. 2 (D)).
A middle coat is applied on the substrate to form a middle coat 3 (FIG. 2).
(See (E)), and further apply a top coat on the intermediate coat 3 to form a top coat 4 to complete the coating (FIG. 2).
(F)).

According to the above method, since the sheet metal processing becomes unnecessary, the time and labor required for repairing the dimple can be greatly reduced, and the cost can be reduced. In addition, since sheet metal processing is not required, and drying of the supplemented stock solution 5 of the intermediate coating material can be completed by using the drying process of the sealer, dimple repair can be performed without removing the vehicle body from the painting line. This makes it possible not only to avoid changing the production plan of the vehicle, but also to repair parts where sheet metal processing is not possible. In addition, since the repair is performed using the undiluted coating solution 5 of the same composition as the intermediate coating to be overlaid on the undercoat 2, the coating of the top coating is better and better than the case where the repair is performed using putty. The use of a thicker undiluted solution 5 improves the durability of the supplemented intermediate coating 6 and improves workability.

Although the embodiments of the present invention have been described in detail above, various design changes can be made in the present invention without departing from the gist thereof.

[0013]

As described above, according to the first aspect of the present invention, at the stage when the undercoating is completed, the repairing paint composed of the stock solution of the intermediate coating paint is supplemented to the minute dimples formed on the outer plate, The repair paint is dried using a sealer drying process, and after drying, the dimple can be repaired without performing sheet metal processing by sharpening the surface of the repair paint that has risen from the undercoat paint surface to be flush with the undercoat paint surface. Will be possible. This not only reduces the time and effort required for repairs, but also enables repairs of parts where sheet metal processing is not possible, and allows repairs to be performed without removing the vehicle body from the painting line. Can be avoided. In addition, since the dents of the undercoat are filled with the undiluted solution of the intermediate paint, the durability of the intermediate paint is improved and workability is improved. Good familiarity can be obtained with good adaptability.

[Brief description of the drawings]

FIG. 1 is a first partial view of an explanatory view of a dimple repairing step of an embodiment.

FIG. 2 is a second partial view of the explanatory view of the dimple repairing step of the embodiment.

FIG. 3 is a first fragmentary view of an explanatory view of a conventional dimple repairing process.

FIG. 4 is a second partial view of an explanatory view of a conventional dimple repair process.

[Explanation of symbols]

 1 Base material 2 Undercoat 3 Intercoat 4 Topcoat 5 Stock solution 6 Intercoat

Claims (1)

[Claims] 1. An automobile outer panel for repairing minute dimples formed on a base material of an outer panel in an automobile outer panel coating step of performing at least an undercoating step, a sealer coating step, a sealer drying step, an intermediate coating step, and an overcoating step. A method of repairing minute dimples, wherein after the completion of the undercoating step, the dimples are repaired with a repair paint consisting of an undiluted intermediate paint, and after the sealer drying step, the repair paint is raised from the undercoat paint surface. A method for repairing fine dimples on an automobile outer panel, comprising: performing a step of polishing the surface so as to be flush with a primer-coated surface.