JPH06329127A - Protective method for coating of vehicle body - Google Patents

Abstract

PURPOSE:To temporarily protect the coated surface of a coating-completed vehicle by a method wherein a heat-shrinkable or non-heat-shrinkable plastic film covers the upper surface of a vehicle body, a heat-shrinkable plastic film is put under the lower surface of the vehicle body, and 2 edges of the films are heat-welded, and one part or the whole body of the films are heat-shrunk to make them tightly adhere to the vehicle body. CONSTITUTION:A plastic film 3 which is wider than the width of a vehicle body is set on a raw material roll 1 for the upper surface, and a plastic film 4 which is narrower than the width of an inner interval between wheels is set on a raw material roll 2 for the lower surface. Then, the upper and lower plastic films 3, 4 are put together, and the front ends are heat-welded. Then, after the vehicle body of a coating- completed vehicle 7 passes between the upper and lower raw material rolls 1, 2, the upper and lower plastic films 3, 4 are put together again behind the vehicle body, and the rear ends are heat-welded, and at the same time, the films are cut at the approx. center of the welded surface. After the upper and lower plastic films cover the vehicle body in this manner, hot air or hot water is jetted to the vehicle body by a hot air or hot water generating device 6, and the plastic film 4 is heat-shrunk to seal and protect the front surface of the vehicle body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for temporarily protecting the coating film surface of a finished automobile coating film.

[0002]

2. Description of the Related Art Painting of automobiles In the process of transporting finished automobiles, the coating value of stones, dust, iron powder, gas, chemicals, etc. may cause damage, gloss, discoloration, etc. Allowing them is often a problem. Occasionally, there is a high probability that damage will occur due to transportation over long distances, export to other countries, etc. For this reason, a method of applying wax with a thickness of 20 to 40 μm or a method of sticking a protective film with an adhesive on a finished car than before Has been taken.
However, since the thickness of this wax coating method is not constant, uniform protection cannot be obtained, it easily stains, is vulnerable to acid rain, has an adverse effect on permeation into the coating film, volatilizes a large amount of solvent during wax coating, and collects wax. There are many drawbacks such as the necessity of wastewater treatment at the time, and the protective film is expensive,
Furthermore, these methods have required a great number of man-hours and costs.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to coat a film in conformity with the shape of a completed automobile to temporarily protect the painted surface of the vehicle body, especially the upper surface of the vehicle body.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a heat-shrinkable or non-heat-shrinkable plastic film is coated on the upper surface of a vehicle body of a painted vehicle, and a heat-shrinkable plastic film is laid on the lower surface of the vehicle body. The present invention relates to a method for protecting a paint film on a vehicle body of an automobile, which comprises fusion-bonding and heat-shrinking a part or the whole of the film to bring it into close contact with the vehicle body to temporarily protect the painted surface of a finished vehicle. In the present invention, the plastic film used for the upper surface of the vehicle body may be heat-shrinkable or non-heat-shrinkable, but actually protects the vehicle body from external influences. There is no particular limitation and a general-purpose film can be used, and a thermoplastic plastic film is particularly preferably used. The thickness of the thermoplastic film is 10 to 200.
0 μm is suitable, and 50 to 200 μm is particularly preferable. The film strength is preferably 0.5 to 3 kg / 25 mm. Specifically, polypropylene (PP), polyvinyl chloride (PVC), polyester (PET), polystyrene (PS) can be used. The plastic film used for the lower surface of the vehicle body is preferably the same as the plastic film used for the upper surface in terms of heat fusion, and it is particularly necessary that the film is a heat-shrinkable film.
It is suitable that the shrinkage ratio at 100 ° C is 10 to 60% in the vertical direction and 0 to 40% in the horizontal direction, and particularly 30 to 50 in the vertical direction.
% Is preferable.

In the present invention, the step of automatically adhering the above plastic film to the body of an automobile includes:
The method as shown in FIGS. 1 and 2 is preferable. A plastic film 3 having a width equal to or wider than the vehicle body width is provided on the upper fabric roll 1, and a plastic film 4 having a width smaller than the inner space of the wheels is provided on the lower fabric roll 2, and the upper and lower plastic films are superposed. , Heat-bond one end on the front side. The body of the finished coating car 7 on the plate 5 passes between the upper and lower original fabric rolls, and the upper and lower plastic films are overlapped on the rear side again, and at the same time as heat fusion, cutting is performed almost at the center of the fused surface. At this time, both the cut surfaces are in a heat-sealed state, one of which is a rear sealing surface and the other is a front sealing surface of the next vehicle body. In this way, the upper and lower plastic films are continuously covered along the vehicle body. In this way, the plastic films having different top and bottom widths are heat-sealed, and after covering the vehicle body, hot air and hot water are applied from the hot air / hot water generator 6 installed below to heat the heat shrinkable plastic film on the lower surface. By shrinking and positioning the top plastic film with the car body, the paint film on the car body can be protected. If necessary, after positioning, the excess portion may be cut and removed for the sake of aesthetic appearance. Further, a portion where the plastic film floats up without being brought into close contact with the vehicle body can be fixed to the vehicle body with an adhesive tape or the like, if necessary. Since the protection of the vehicle body coating film by the method of the present invention is mainly aimed at the protection of the upper surface of the vehicle body where the coating film is easily damaged, there are cases in which the residual solvent and reaction products volatilize in the coating film that does not pass after the coating. , It is convenient that the side is open without completely sealing it, and it is necessary to operate when shipping, such as when exporting a completed car, but especially because the door side of the driver's seat can be opened,
It is also possible to allow the driver to get on and off. Further, if a large number of places or four sides of the plastic film for the upper surface and the plastic film for the lower surface are heat-sealed, the entire surface of the vehicle body can be sealed and protected by heat-shrinking the plastic film.

[0006]

INDUSTRIAL APPLICABILITY According to the present invention, the wax coating work and the solvent volatilization which are caused by the conventional wax coating, the equipment investment and the bad influence due to the penetration into the coating film lacking the protection ability, the waste water treatment by the wax cleaning, etc. It was possible to realize the protection of the car body surface of the finished painted car which was very simple and effective at a low cost because it was solved.

[Brief description of drawings]

FIG. 1 is a side view showing a process of covering and protecting a vehicle body of an automobile of the present invention using a heat shrinkable film.

FIG. 2 is a schematic top view of each step in FIG.

[Explanation of symbols]

 1 Original roll 1 (wide) 2 Original roll 2 (narrow) 3 Wide heat-shrinkable film 4 Narrow heat-shrinkable film 5 Plate 6 Hot air / hot water generator 7 Painted vehicle

Claims (1)

[Claims] 1. A heat-shrinkable or non-heat-shrinkable plastic film is coated on the upper surface of a vehicle body of a painted vehicle, and a heat-shrinkable plastic film is laid on the lower surface of the vehicle body. A method for protecting a vehicle body coating film of an automobile, characterized in that a part or the whole of a plastic film is heat-shrinked to be brought into close contact with the vehicle body.