JPH0780397A - Protective film forming method and apparatus - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a protective film forming method and apparatus for forming a uniform protective film thickness by applying and drying a strippable paint. [Structure] The method of forming a protective film includes a coating step 1 for applying a strippable paint to a painted vehicle, a pre-drying step 2 for pre-drying the strippable paint applied to the painted vehicle, and a pre-dried painted vehicle. The main drying step 3 of main drying is performed. Further, the protective film forming apparatus includes a coating booth 4 and a setting booth 5 for coating stripped paint on a finished coating vehicle, an infrared drying furnace 6 for predrying the strippable paint coated on a finished coating vehicle, and a spare. It was composed of a hot-air drying oven 7 which is an oven for main-drying the dried finished car.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for forming a protective film by applying a liquid strippable paint to a finished product.

[0002]

2. Description of the Related Art Conventionally, when a completed automobile is shipped, a liquid rust preventive wax is applied to the coated surface of the automobile to form a protective film in order to prevent dust and the like from adhering to the coated surface. It was

However, recently, from the viewpoint of reducing the load of wax removal work at the shipping destination and environmental protection, for example, as described in JP-A-3-267171,
There is a coating film protection method that temporarily protects the painted surface of the finished car by pressing a plastic film with a removable pressure-sensitive adhesive on the painted surface of the finished car using a vacuum to cover the car body. Are known. Further, strippable paint is also applied to small parts.

[0004]

However, when a vehicle body is covered with a plastic film, the protective film covers the entire vehicle, so that the protective film is applied to a portion such as windshield that does not need to be protected. However, there was a problem that the cost would increase.

Further, when strippable paint is used, it is possible to apply only the portion to be protected, but if the object is large, such as an automobile, the protective film thickness will be uneven due to uneven drying, for example. There is a problem in that the protective film is broken due to deposits and deposits.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to form a uniform protective film thickness by applying and drying a strippable paint. An object of the present invention is to provide a protective film forming method and its device.

[0007]

In order to solve the above problems, the method for forming a protective film according to claim 1 is a method for forming a protective film by applying strippable paint to a large finished finished product such as an automobile body. The step of applying the strippable paint to the coated finished product, the step of pre-drying the strippable paint applied to the coated finished product, and the step of main drying the pre-dried coated finished product. I made it.

An apparatus for forming a protective film according to a second aspect is an apparatus for forming a protective film by applying a strippable paint to a large finished finished product such as an automobile body, wherein the strippable paint is applied to the finished finished product. A coating booth for coating, a pre-drying oven for pre-drying the strippable paint applied on the finished coating product, and a main drying oven for main-drying the pre-dried finished coating product.

Further, the drying temperature for drying the coated finished product coated with the strippable paint is 60 to 90.
It should be in ° C. The preliminary drying oven is preferably an infrared drying oven.

[0010]

[Operation] Strippable paint is applied to a large-sized finished product at the application booth, and then strippable paint applied to the large-sized finished product is pre-dried in a preliminary drying furnace.
Further, it is finally dried in a main drying furnace to form a uniform protective film on the surface of the large finished coating product.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an explanatory diagram of the structure of a protective film forming method and apparatus according to the present invention.

As shown in FIG. 1, the method for forming a protective film on the coating surface of a finished car is as follows: step 1 of applying strippable paint to the finished car, and then applying to the finished car. It is carried out by a preliminary drying step 2 for predrying the strippable paint and a main drying step 3 for further main drying the pre-dried coated vehicle.

Further, as shown in FIG. 1, a protective film forming apparatus for forming a protective film on a coating surface of a completed car has a coating booth 4 and a setting booth 5 for applying strippable paint to the completed car, and a coating completion. It is composed of an infrared drying furnace 6 which is a furnace for predrying the strippable paint applied to the car, and a hot air drying furnace 7 which is a furnace for main-drying the pre-dried painted car. Reference numeral 8 is a transfer device for transferring the completed coating vehicle in the order of the coating booth 4, the setting booth 5, the infrared drying furnace 6, and the hot air drying furnace 7.

The structure of the coating booth 4 is the same as that of a normal coating booth, but when a water-soluble strippable paint (for example, lap guard manufactured by Kansai Paint Co., Ltd.) is used, the booth temperature is 10 to 25 ° C. and the booth humidity is 50 to 50 ° C. 80%
Is desirable. Outside this temperature and humidity range, there is a risk that the protective film of water-soluble strippable paint will not be formed. The application means is not particularly limited, and brush coating, roller brush coating, a spray gun, or the like is used.

The setting booth 5 is usually used at an ambient temperature of 15 to 30 ° C. and a humidity of 50 to 80%.

The infrared drying oven 6 is used as the preliminary drying oven in order to accelerate the drying from the inside of the protective film. In particular, infrared rays having a wavelength of 2 to 4 μm may be applied to the water-soluble strippable paint for 30 to 60 seconds.
In this way, promoting the drying from the inside of the protective film is
This is because when drying is started from the surface of the protective film, holes or cracks are generated on the surface of the protective film due to the solvent or water generated from the inside, and the protective performance is deteriorated.

The hot-air drying oven 7 is used as the main drying oven in order to uniformly heat the entire article to be coated. Also,
A drying temperature of 60 to 90 ° C. is desirable from the viewpoint of protecting accessories such as various electric components as a drying oven for a completed vehicle.

[0018]

As described above, according to the present invention, the liquid strippable paint can be applied and dried appropriately and continuously, and the protective film can be uniformly formed. Further, when the water-soluble strippable paint is dried, since the pre-drying furnace that performs the pre-drying step is provided, the protective film thickness can be made thick and uniform.

[Brief description of drawings]

FIG. 1 is a configuration explanatory view of a protective film forming method and an apparatus therefor according to the present invention.

[Explanation of symbols]

1 ... Coating process, 2 ... Preliminary drying process, 3 ... Main drying process, 4
... coating booth, 5 ... setting booth, 6 ... infrared drying oven (preliminary drying oven), 7 ... hot air drying oven (main drying oven), 8
... a transport device.

Claims (4)

[Claims] 1. A method for forming a protective film by applying strippable paint to a large-sized painted finished product such as an automobile body, the method comprising applying the strippable paint to the painted finished product, and the painted finished product. A method of forming a protective film, comprising: a step of pre-drying the strippable paint applied to the substrate; and a step of main-drying the pre-dried finished coating product. 2. An apparatus for forming a protective film by applying strippable paint to a large finished product such as an automobile body, the coating booth applying the strippable paint to the finished product, and the coating completion. An apparatus for forming a protective film, comprising: a pre-drying oven for pre-drying the strippable paint applied to the product, and a main drying oven for main-drying the pre-dried coated finished product. 3. The method for forming a protective film according to claim 1, wherein a drying temperature at which the coated finished product coated with the strippable paint is dried is 60 to 90 ° C. 4. The protective film forming apparatus according to claim 2, wherein the preliminary drying oven is an infrared drying oven.