JPH01135699A - Method of supplying sheathing part outside surface - Google Patents

Abstract

PURPOSE: To realize highly accurate painting without damaging the appearance by pressing a base film against the outer surface of an external component thereby transferring a painting layer printed on the base film to the outer surface of the external component. CONSTITUTION: A base film F is pressed against the outer surface of a fairing 11 and a painting layer 16 is pasted thereto through an adhesive layer 15. The fairing 11 is then taken out from a vacuum container and the base film F is peeled off. Under such state, a painting formed by an ink layer 14 is transferred onto the outer surface of the fairing 11 and the painting is pasted only onto the outer surface of the fairing 11. The painting at an opening, e.g. an air duct 12, made in the fairing 11 and at a part deviated from the circumferential part of the fairing 11 is removed while adhering to the base film F when it is peeled off. Subsequently, a peeling layer 13 exposed onto the fairing 11 is irradiated with UV-rays and hardened.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the outer surface of exterior parts, such as fairings, side covers, or The present invention relates to a painting method suitable for painting the outer surface of a tank or the outer surface of a ship's hull parts.

[Prior art] Generally, stripes, marks, etc. (including letters) are painted on the outer surface of exterior parts such as fairings of motorbikes to enhance the design effect. As a painting method, a method is used in which a striped or predetermined mark-shaped film coated with an adhesive on the back is manually aligned and pasted onto the exterior component one by one.

However, in particular, there are curved surfaces with large curvatures, such as motorcycle fairings, and openings such as air ducts are provided in relation to functions.
When painting exterior parts that have discontinuous parts or uneven surfaces using the method described in ML, it may not be possible to ensure the stretch of the film for stripes or marks along the curved surface, resulting in wrinkles. Furthermore, when a continuous pattern is provided in a discontinuous portion or a portion with different levels, and furthermore, when a continuous pattern is provided between two members that are butted against each other, a problem arises in that the pattern is likely to be misaligned.

As a conventional painting method that can solve these problems, for example, there is a technique disclosed in Japanese Patent Publication No. 56-45768.

This technology involves positioning and placing a thermoplastic film on which a pattern is printed and laminated with adhesive against the exterior component, then heating and softening the film, and then using the pressure difference between the two sides of the film to By press-bonding the pattern to the outer surface of the exterior component, the pattern is painted on the outer surface of the exterior component while being covered with a film.

Further, as another method, there is a masking method that is mainly used when performing two-tone or three-tone painting.

This technique is used, for example, in the case of two-tone painting.
Paint the main color on the entire surface of the exterior part, let it dry, then apply masking paper to expose the necessary areas, apply another color, and then peel off the masking paper. By drying it afterwards,
I decided to start painting.

[Problems to be Solved by the Invention] The present invention aims to solve the following problems in the above-mentioned conventional technology.

In other words, in Moeya's conventional technology, the film is left covering the design, so the painting is done later.
Since the above-mentioned opening of the fairing is closed by the film and the film protrudes from the periphery of the fairing, the portion covering the opening and the film protruding from the periphery. For example, it is necessary to perform a process to remove the

In addition, in the latter conventional technology, it is necessary to go through the steps of painting, drying, pasting masking paper, peeling, and drying, and the work of pasting and peeling masking paper must be done manually. This poses a problem in that it becomes an obstacle to improving productivity and tends to lead to rising costs.

[Means for Solving the Problems] An object of the present invention is to provide a method for painting the outer surface of an exterior component that can effectively solve the above-mentioned problems. The painting method is to press a base film on which a pattern layer consisting of at least three layers, a release layer, an ink layer, and an adhesive layer is printed, onto the outer surface of the exterior component with the pattern layer facing the exterior component. The method is characterized in that the base film is peeled off, the pattern layer is transferred to the outer surface of the exterior component, and then the surface of the pattern layer is subjected to a hardening treatment.

[Function] The method for painting the outer surface of an exterior component according to the present invention is to press a base film onto the outer surface of the exterior component and transfer the pattern layer printed on the base film to the outer surface of the exterior component. This improves the accuracy of alignment between the image and the image.
In addition, by peeling off the base film after transfer, the opening formed in the exterior component can be opened and the protruding portion from the periphery of the exterior component can be removed at the same time, making this work easier. , the illustrations simplify operation.

[Example code] Hereinafter, one embodiment of the present invention will be described based on the drawings.

Reference numeral l in FIG. 1 indicates a motorcycle equipped with exterior parts to which this embodiment is applied, including a body frame 2, a front fork 3 rotatably mounted on the front part of the body frame 2, A steering handle 4 attached to the upper end of the front fork 3, a front wheel 5 rotatably attached to the lower part of the front fork 3, a fork 6 rotatably attached to the rear of the vehicle body frame 2,
A rear wheel 7 is rotatably attached to the swinging end of the rear fork 6, an engine 8 is attached to approximately the center of the vehicle body frame 2, and a fuel tank 9 is attached to the upper part of the vehicle body frame 2. It includes a seat IO attached to the vehicle body frame 2 at a rear position of the fuel tank 9, and a fairing 11 as an exterior component provided to cover the front, side, and rear upper part of the vehicle body frame 2. The outer surface of this fairing 11 is painted by the method according to this embodiment.

The fairing 11 is made of synthetic resin such as ABS or AES, or painted metal such as steel plate or aluminum, and has an air duct 12 in a portion facing the side of the vehicle body frame 2. is opened.

Here, in addition to resin-based paints, paints having polarity and low drying temperature, such as urethane-based paints, are preferably used as the paint used for the painting.

Next, the painting method of this embodiment will be explained.

First, the structure of the base film F used in this embodiment will be explained.

As shown in FIG. 2, this base film F has a pattern layer formed by sequentially laminating a release layer 3, an ink layer 14, and an adhesive layer 15 on one side (the lower surface in FIG. 2). 16 are formed.

The base film F is made of thermoplastic resin, and specific examples thereof include vinyl chloride and ABS.

Examples include fluorocarbon resin, polyethylene, polypropylene, polycarbonate, and composites thereof. Considering the elongation of the base film F and the printability cost of the pattern layer 16, vinyl chloride is preferably used. Further, the thickness of the base film F is appropriately set in consideration of moldability, cost, etc.

As the peeling layer 13, polyvinyl butyral, nitrocellulose, chlorinated rubber, etc. are used, and in particular, the following table-1
As shown in the results of the accelerated weathering test, polyvinyl butyral is preferred because it is advantageous in terms of weather resistance and adhesion.

Table - ■ (Accelerated Weather Resistance Test) Furthermore, in this example, 1. Antioxidants and radical scavengers are added as appropriate, and ultraviolet curable resins,
Also, a photoinitiator and a sensitizer are mixed.

The reason for mixing this ultraviolet curable resin is that it does not inhibit the elongation of the base film F, and also ensures peelability from the base film F due to the characteristics of polyvinyl butyral, while improving the scratch resistance of the pattern layer 16. This is to improve the quality of life. The problem is that resins with good scratch resistance are usually hard, brittle, and difficult to stretch.
If such a resin is used in the release layer 13 described above, it will cause the elongation of the base film F to be inhibited, but as described above, by using an ultraviolet curable resin in the release layer 13, it will be possible to prevent damage to the surface of the exterior component. At the time of attachment, the base film F is allowed to elongate in an uncured state, and after the base film F is peeled off, it is irradiated with ultraviolet rays and cured, thereby ensuring the scratch resistance as described above. At the same time, since the ultraviolet curable resin has a low viscosity, it can be expected that the printing suitability for the base film F will be improved.

Examples of the ultraviolet curable resin include polyester acrylate, epoxy acrylate, polyurethane acrylate, polyether acrylate, and polyol acrylate. Here, in order to increase the hardness, it is preferable to use an acrylate with two or more functionalities, and in order to further increase the scratch resistance, it is necessary to use an acrylate with three or more functionalities.

The reason why the photoinitiator is mixed is to promote the curing of the ultraviolet curable resin by ultraviolet rays. One or more types of ketal etc. are added in an amount of 0.01% to 10% based on the ultraviolet curable resin.
Mix and use.

Furthermore, the sensitizer is used to increase the effect of the photoinitiator, and amines are used.

On the other hand, in consideration of storage stability, it is desirable to use a storage stabilizer (polymerization inhibitor) such as hydroquinone.

Although normal ink can be used for the ink layer 14, it is preferable to use an ink that uses a resin binder such as acrylic-hydrochloric acid and a pigment with good weather resistance, since it is necessary to ensure elongation. .

As the adhesive layer 15, either a thermoplastic resin or a thermosetting resin can be used, but for example, when adhering to a resin or a painted surface made of resin, there are strength restrictions and In consideration of storage stability, thermoplastic resins, particularly urethane-based thermoplastic resins, are preferred.

On the other hand, the release layer 13, the ink layer 14, and the adhesive layer 16 are sequentially laminated on the base film F by printing means such as silk printing, gravure printing, barcode printing, knife coating, etc.

Among these methods, when applying letters or two-tone/three-tone designs to the fairing 11 of motorcycle I,
Silk printing is preferable from a cost and quantity standpoint.

Next, a procedure for painting the outer surface of the fairing 11 by the method of this embodiment using the base film F on which the pattern layer 16 having the above structure is printed will be explained.

First, the base film F on which the pattern layer 16 has been printed as described above is placed in a vacuum container with the pattern layer 16 facing the outer surface of the fairing 11 and with the pattern and the fairing 11 aligned. The inside of the vacuum container is airtightly divided by a base film F.

Next, after the internal pressure of each of the divided chambers formed in the vacuum container by the base film F is reduced to the same vacuum pressure, the base film F is heated and softened.

The heating temperature at this time is the base film F as described above.
When PVC is used, the temperature is set within the range of approximately 90°C to 150°C, but furthermore, considering the activation state of the adhesive layer 15, it is optimal to set the temperature within the range of 100°C to 140°C. It is.

Thereafter, by opening the divided chamber on the side where the fairing 11 is not disposed to the atmosphere and increasing its internal pressure, the base film F is applied to the outer surface of the fairing 11, as shown in FIG. The pattern layer 16 is adhered to the fairing 11 by the adhesive layer 15.

Next, after taking out the fairing 11 from the vacuum container, the base film F is peeled off.

In this state, the pattern formed by the ink 814 is transferred to the outer surface of the fairing 11, and this pattern is only adhered to the outer surface of the fairing 11, so that the base film F is not peeled off. Tora, as shown in FIG. 4, the pattern located at the opening of the air duct 12 etc. formed in the fairing 11 or the part protruding from the periphery of the fairing 11 is attached to the base film F. will be removed. Moreover, when the base film F is pressure-bonded to the fairing 11, the flexibility of the base film F causes the pattern layer 16 to slightly wrap around the back side of the opening and the outer peripheral edge of the fairing 11. Since the sides are covered, the cut-off end of the pattern is located on the back side of the fairing 11, and the appearance is not spoiled.

After such a removal operation of the base film F, the peeling layer 13 exposed on the fairing 11 is irradiated with ultraviolet rays to harden the peeling layer 13.

Here, the irradiation of the ultraviolet rays is performed using, for example, a high-pressure mercury lamp, a metal halide lamp, etc., and the irradiation amount is 1
00 mJ/cm'' or more, particularly preferably 200 mJ/cm''.

As a result, a hardened layer is formed on the surface of the pattern layer 16, making it possible to perform painting with high weather resistance and scratch resistance.
When applied to exterior parts such as the fairing 11 described above that are exposed to adverse conditions such as being sprayed with outside air, rain, and even mud, it is expected that the appearance will be maintained for a long period of time.

Note that the above-mentioned embodiment is just an example, and the present invention is not limited to this embodiment, and various changes can be made based on design requirements and the like.

For example, the curing treatment for the pattern layer, which is the final step, can be carried out by applying a clear coat to the surface of the pattern layer.

In this case, the paint used is a two-component urethane paint for the resin exterior parts, and an acrylic melamine paint for the fuel tank.

In addition, it can be applied not only to fairings of motorcycles 1, but also to side covers and other exterior parts of motorcycles, tricycles such as buggies, four-wheeled vehicles such as passenger cars, and even exterior parts of ships. It is also possible to apply to

Furthermore, the method of press-bonding the base film F to the exterior component may be any method other than the method described above.

[Effects of the Invention] As explained above, the method for painting the outer surface of an exterior component according to the present invention is particularly effective in applying a pattern layer consisting of at least three layers, a release layer, an ink layer and an adhesive layer, to the outer surface of the exterior component. After pressing the base film printed with the pattern layer to the exterior component with the pattern layer facing the exterior component, the base film is peeled off and the pattern layer is transferred to the outer surface of the exterior component. Since the surface of the layer is subjected to hardening treatment, the following excellent effects are achieved.

It is possible to paint with high precision at a predetermined position on an exterior part, and even when painting across a discontinuous part formed on an exterior part, the edge of this discontinuous part can be painted. To prevent deterioration of appearance by suppressing positional deviation between patterns in between.

In addition, by one operation of peeling the base film,
When an opening is formed in the exterior component, the opening can be opened and the protruding portion from the periphery can be removed, and the painting process can be simplified.

Furthermore, painting can improve the weather resistance and scratch resistance of the surface of the subsequent design.

[Brief explanation of the drawing]

FIG. 1 is a side view of a motorcycle to which an embodiment of the present invention is applied, FIG. 2 is an enlarged vertical sectional view showing the structure of a base film used in the embodiment, and FIGS. 1 is a process explanatory diagram of an example, and corresponds to a cross-sectional view taken along line III-III in FIG. 1. l...Motorcycle, ■1...Fairing, 13...Peeling layer, 14
... Ink layer, 15 ... Adhesive layer,
16...Picture layer, F...Base film.

Claims (1)

[Claims] A base film on which a pattern layer consisting of at least three layers, a release layer, an ink layer, and an adhesive layer is printed, is pressed onto the outer surface of the exterior component with the pattern layer facing the exterior component, and then the base film is A method for painting the outer surface of an exterior component, which comprises peeling off a film, transferring the pattern layer to the outer surface of the component, and then subjecting the surface of the pattern layer to a hardening treatment.