JPH02137993A - Method for applying image to outer surface of outer-covering component part - Google Patents

Abstract

PURPOSE:To facilitate a film removing processing and to conduct an image application with high accuracy by a method wherein in the printing of an image pattern layer to a base film a direction in which the accuracy of an image pattern is required is made to coincide with a direction orthogonal to a base film feed direction at the time of molding. CONSTITUTION:On a base film F being compression molded between rolls R, an image pattern layer 16 made of three layers, i.e., a release layer 13, an ink layer 14, and an adhesive layer 15, is printed. The image pattern layer 16 of the base film F is opposedly contact bonded with an outer covering component part, the base film F is released, and the image pattern layer 16 is transferred to the outer surface of the outer-covering component part. In the printing of the image pattern layer 16, a direction X in which the accuracy of an image pattern is required is made to coincide with a direction orthogonal to a base film feed direction A at the time of molding. Then, the release layer 13 is irradiated with an ultraviolet light to be cured. The forming of the cured layer on the surface of the image pattern layer 16 enables an image application of high weatherability and resistance to marring. In the transfer of the image pattern, the base film F has the largest shrinkage in the feed direction thereof, but has little shrinkage orthogonally to the feed direction. Since a direction in which the accuracy of the image pattern is required is made to coincide with this direction, an accuracy in a required direction is kept favorably.

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 motorcycle fairings to enhance the design effect. As a method, for example, as shown in Japanese Patent Publication No. 56-45768, a thermoplastic film on which a pattern is printed and an adhesive is laminated is positioned and placed on an exterior component, and then heated and softened. A technique is known in which the film is pressure-bonded to the outer surface of the exterior component, thereby painting the pattern on the outer surface of the exterior component with the pattern covered by the film.

``Problem to be Solved by the Invention'' However, in the above technique, since the film is left covering the design, the painting is later done with the opening of the fairing covered by the film. Furthermore, since the film protrudes from the periphery of the fairing, there are drawbacks such as the need to remove the portion covering the opening and the film protruding from the periphery.

Therefore, the present applicant previously disclosed in Japanese Patent Application No. 62-294709 a base film in which a pattern layer consisting of at least three layers, a release layer, an ink layer and an adhesive layer, is printed on the outer surface of an exterior component. After pressing the pattern layer facing the exterior component, the head film is peeled off and the pattern layer is transferred to the outer surface of the exterior component, and then,
We have proposed a method in which the surface of the pattern layer is hardened.

However, in implementing the above painting method, it was found that the following problems remained.

That is, as the base film F, the first
As shown in the figure, a film is used that is squeeze-molded by being sandwiched between two rolls R, and such a film retains stress (in the direction of arrow A) due to the squeezing action during molding. . During the heating process during transfer, this residual stress causes the film to move in the roll-out direction (input direction).
This results in a large shrinkage, and as a result, as shown in FIG. 2, the problem is that the accuracy of the design of the product is reduced. The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for painting the surface of an exterior component, which not only allows easy removal of the film but also allows desired high-precision painting. .

"Means for Solving the Problems" The characteristic part of the first invention of the present application is that a pattern layer consisting of at least three layers, a release layer, an ink layer and an adhesive layer, is provided on a base film which is squeeze-molded by being sandwiched between rolls. After printing, the base film is pressure-bonded to the outer surface of the exterior component with the pattern layer facing the exterior component, and then the base film is peeled off and the pattern layer is transferred to the exterior surface of the exterior component. A method for painting the surface of an exterior component by subsequently subjecting the surface of the pattern layer to a hardening treatment, in which when printing the pattern layer, the direction in which accuracy of the pattern is required is determined by feeding the base film. The point is to print according to the direction.

In addition, the characteristic part of the second invention of the present application is that instead of devising the arrangement of the pictures in the picture layer, which is the second part of the first invention, when printing the picture layer, the shrinkage at the time of pressure bonding of the base film is predicted, The point is that the pattern layer is printed in a pre-stretched state with a deformation rate corresponding to the contraction.

In addition, the characteristic part of the third invention of the present application is that, instead of the latter part of the first invention, a plurality of base films are pasted on top of each other with their feeding directions perpendicular to each other during molding, and Painting consists in printing layers.

[Function] According to the first invention of the present application, the base film is pressure-bonded to the outer surface of the exterior component and the pattern layer printed on the base film is transferred to the outer surface of the exterior component, thereby aligning the exterior component and the pattern. In addition, by peeling off the base film after transfer, it is possible to open the opening formed in the exterior part and remove the protruding part from the periphery of the exterior part at the same time, making this work easier. By doing so, the operation of the illustrations can be simplified.

In addition, during the heating process during transfer, the design shrinks the most in the feeding direction of the base film, but it does not shrink as much in the direction perpendicular to this direction. Therefore, the necessary directional accuracy is maintained well.

Further, according to the second invention of the present application, when printing the pattern layer, the pattern layer is printed in a pre-stretched state, taking into account shrinkage when the base film is pressed, so that the finished pattern is close to the desired one. can get.

Further, according to the third invention of the present application, since the plurality of base films function to reduce mutual deformation and the horizontal and vertical shrinkage rates of the entire base film are approximately the same, this method However, high-precision painting can be done.

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

1 First Embodiment - Reference numeral 1 in FIG. 3 indicates a motorcycle equipped with an exterior part to which this embodiment is applied, which is rotatably attached to a body frame 2 and the front part of this body frame 2. a front fork 3, 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, and a front wheel 5 rotatably attached to the rear of the vehicle body frame 2. rear fork 6 and
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 lO 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%AES or painted metal such as steel plate or aluminum, and has an air duct +2 is opened.

Here, among resin-based paints, those having polarity and low drying temperature, such as urethane-based paints, are preferably used as the paint used for the coating.

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

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

As shown in FIG. 4, 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. 4). 16 are formed.

As shown in FIG. 5, this pattern layer 16 has stripes S in order to make the direction
High accuracy is required in the width direction Note that the stripe S is printed slightly larger in the longitudinal direction than the width of the airing 110.

The base film F is made of thermoplastic resin, and specific examples thereof include vinyl chloride, 8BS, fluorocarbon resin,
Examples of the base film F include polyethylene, polypropylene, polycarbonate, and composites thereof.
Considering the elongation of the pattern layer 16 and the printability cost of the pattern layer 16, vinyl chloride is preferably used. The base film F is sandwiched between rolls and made by compression molding, as shown in FIG. 1, and its thickness is appropriately set in consideration of moldability, cost, etc.

As the peeling layer 13, polyvinyl butyral, nitrocellulose, chlorinated rubber, etc. are used, and polyvinyl butyral is particularly preferred since it is advantageous in terms of weather resistance and adhesion.

Further, in this example, in order to improve weather resistance in the resin used for the peeling layer 13, antioxidants, radical scavengers, ultraviolet absorbers, etc. are added as appropriate, and ultraviolet curable resins, , photoinitiators and sensitizers are mixed.

The purpose of mixing this ultraviolet curable resin is to maintain the scratch resistance of the pattern layer 16 without inhibiting the elongation of the base film F and to ensure peelability from the base film F due to the properties of polyvinyl butyral. It is intended to improve sexual performance. That is, resins with good scratch resistance usually have high hardness, brittleness, and poor elongation, so if such resins are used in the release layer 13 described above, the peeling of the base film F will be inhibited. However, as mentioned above, by using an ultraviolet curable resin for the release layer 13, the base film F is allowed to elongate in an uncured state when attached to the surface of the exterior component, and the base film F is After peeling off, by irradiating it with ultraviolet rays and curing it,
This ensures 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 improve the scratch resistance, an acrylate with three or more functionalities is required.

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 to the ultraviolet curable resin at a rate of 0. O1%~lO%
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 ).hydroquine.

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

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 on a resin, there are temperature restrictions and base film F. In consideration of storage stability, thermoplastic resins, particularly urethane 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, silk printing is preferable in terms of cost and quantity when applying a two-tone or three-tone pattern to the fairing 11 of a motorcycle l.

Next, using the base film F on which the pattern layer 16 having the above-mentioned structure is printed, the procedure of painting the outer surface of the fairing 11 by the method of this embodiment is shown in FIGS. 6(a) to 6(a). The explanation will be based on d).

First, the fairing 11 is mounted on the stand 2 via the support 20.
Set it on 1. Further, the base film F on which the pattern layer 16 is 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. 22
The vacuum container 22 is
Separate the inside airtight.

Next, after reducing the pressure so that each of the divided chambers 22a and 22b formed in the vacuum container 22 by the base film F has the same vacuum pressure, the base film F is placed in the upper part of the vacuum volume 'a22. It is heated and softened by the provided heater 23.

The heating temperature at this time is the base film F as described above.
When vinyl chloride is used for
However, in consideration of the activation state of the adhesive layer 15, it is optimal to set it within the range of 100°C to 140°C.

Thereafter, the fairing 11 is raised by the lifting means 24 and brought into contact with the base film F, and the divided chamber 22a on the side where the fairing 11 is not disposed is opened to the atmosphere to increase its internal pressure. As a result, as shown in FIG. 6(d), the base film F is brought into pressure contact with the outer surface of the fairing 11, and the pattern layer 16 is adhered to the fairing 11 using the adhesive layer 15.

Next, after taking out the fairing 11 from the vacuum container 22, the base film F is peeled off.

In this state, the pattern formed by the ink layer 14 is transferred to the outer surface of the fairing 11, and since this pattern is stuck only to the outer surface of the fairing 11, when the base film F is peeled off, As shown in FIG. 8, the patterns located at the openings of the air duct 12 etc. formed in the fairing 11 and the parts protruding from the peripheral edge of the fairing 11 are removed while remaining attached to the base film F. Ru. Moreover, when press-bonding the base film F to the fairing 11, this base film F
Due to its flexibility, the pattern layer [6] wraps around the periphery of the opening and the outer periphery of the fairing 11 and covers it slightly to the back side. It is located on the back side and does not spoil the appearance.

In addition, although the base film F itself shrinks in the process of heating and softening the base film F, the width direction A
Since it is aligned in a direction perpendicular to , deformation in this direction is guaranteed to be small. That is, in the finished product, a certain degree of accuracy in the width direction X of the stripes S is guaranteed.

In this way, the accuracy of the direction X perpendicular to the feeding direction A during base film molding is guaranteed to some extent because the residual stress component remaining during base film forming is mainly in the feeding direction, and the component in the direction perpendicular to it is Very little left. Therefore, when the base film is heated, almost no shrinkage in the x direction is observed.

After the base film F is removed, the release layer 13 exposed on the fairing 11 is irradiated with ultraviolet rays to harden the release layer 13. Here, the ultraviolet irradiation is performed using, for example, a high-pressure mercury lamp or a metal halide lamp, and the irradiation amount is 100 mJ/ctn.
In particular, a range of 200 mJ/am to 10100 O/cm' to 2000 mJ/ca' depending on the conditions is suitable.

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.

1. Second Embodiment - FIG. 9 shows a second embodiment of the present invention. The feature of this example is that when printing the pattern layer 16, the shrinkage of the base film F upon heating is predicted, and the pattern layer 16 is printed in a pre-stretched state with a deformation rate corresponding to the shrinkage. .

According to such a method, accuracy is not only guaranteed in a certain fixed direction, but also deformation of the base film F in all directions can be coped with.

-Third Embodiment- Fig. 10 shows a third embodiment of the present invention. The feature of this example is that the base film F has a structure in which at least two sheets are pasted one on top of the other so that the feeding directions during molding are orthogonal to each other, and a layer of decoration is printed on top of the sheets. It is.

In this example, the directions of deformation are orthogonal to each other, and the characteristics are that the deformation of the base film F itself is reduced, and that the base film F shrinks and deforms uniformly in the vertical and horizontal directions. In this embodiment, the same effects as in both of the above embodiments can be obtained.

Note that a structure may be adopted in which three or more sheets are stacked and pasted.

Modified Example 1 The above-mentioned embodiments are merely examples, and the present invention is not limited to these embodiments, 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 coating to the surface of the pattern layer without using an ultraviolet curable resin.

In this case, the paint used is a two-component urethane paint for the resin exterior parts, and a high temperature baking type acrylic melamine paint for the metal fuel tank.

Further, in each of the above embodiments, the means for painting with high precision in order to cope with the deformation of the base film during molding and heating are in a parallel relationship, but two of these may be combined, or three It is also possible to combine all three methods.

Moreover, means for subjecting the base film F to annealing treatment may be combined with each of the above embodiments.

In addition, the application is not limited to fairings 11 of motorcycles l, 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, according to the method for painting the surface of an exterior component according to the first invention of the present application, at least a release layer, an ink layer and an adhesive are applied to the base film which is sandwiched between rolls and press-molded. A base film on which a picture layer consisting of three layers of agent layers is printed is pressure-bonded with the picture layer facing the exterior part, and then the base film is peeled off and the picture layer is applied to the outer surface of the exterior part. Because it is obtained by transferring and then hardening the surface of the pattern layer,
It is possible to paint at a set position on an exterior part, and even when painting across a discontinuous part formed on an exterior part, the pattern between the edges of this discontinuous part can be painted. To suppress misalignment and prevent damage to appearance.

In addition, by one operation of peeling the base film,
When an opening is formed in an exterior part, it is possible to open the opening and remove the protruding part from the periphery, and painting can simplify the work, and in addition, painting can be done later. The weather resistance and scratch resistance of the surface of the pattern can be improved.

In addition, during the film heating process during transfer, the design shrinks the most in the feeding direction of the base film, but it does not shrink as much in the direction perpendicular to this direction, and this direction is consistent with the direction in which the precision of the design is required. As a result, the necessary directional accuracy is maintained well.

Further, according to the second invention of the present application, when printing the pattern layer, the pattern layer is printed in a pre-stretched state, taking into consideration the shrinkage of the base film when it is pressed, so that the finished pattern is close to the desired one. is obtained.

Further, according to the third invention of the present application, since the plurality of base films function to reduce mutual deformation and the horizontal and vertical shrinkage rates of the entire base film are approximately the same, this method However, high-precision painting can be done.

[Brief explanation of the drawing]

1 and 2 are detailed illustrations of the present invention;
The figure is a side view of a motorcycle to which an embodiment of the present invention is applied, FIG. 4 is an enlarged vertical sectional view showing the structure of a base film used in the embodiment, FIG. 5 is a front view of the same, and FIG. 6 (a)
~(d) are diagrams explaining the painting procedure, Figures 7 and 8 are diagrams showing the main parts of the painting procedure, and Figures 9 and 10 are diagrams showing the main parts of the painting procedure.
The figure is an explanatory diagram of main parts of another embodiment. ■...Motorcycle, 11...Fairing, l3...Peeling layer, 14...
... Ink layer, 15 ... Adhesive layer,
16...Picture layer, 22...Vacuum container,
23... Heater, F... Base film, A... Feeding direction during base film molding,
X...Direction that requires precision of the pattern.

Claims (3)

[Claims] (1) A base film that is squeeze-molded between rolls has at least three layers: a release layer, an ink layer, and an adhesive layer.
After printing a pattern layer consisting of layers, press-bonding the base film to the outer surface of an exterior component with the pattern layer facing the exterior component, and then peeling off the base film and applying the pattern layer to the exterior component. A method for painting the outer surface of an exterior component by transferring the pattern onto the outer surface of the base film and then subjecting the surface of the pattern layer to a hardening treatment, which requires precision of the pattern when printing the pattern layer on the base film. 1. A method for painting the outer surface of an exterior part, characterized in that the printing direction is aligned with the direction perpendicular to the feeding direction during base film molding. (2) After pressing a base film printed with a pattern layer consisting of at least three layers, a release layer, an ink layer, and an adhesive layer, onto the outer surface of the exterior component with the pattern layer facing the exterior component, , a method for painting the outer surface of an exterior component, comprising peeling off the base film, transferring the pattern layer to the outer surface of the exterior component, and then subjecting the surface of the pattern layer to a hardening treatment, the method comprising: A method for painting the outer surface of an exterior part, characterized in that when printing the layer, the shrinkage when the base film is pressed is predicted, and the pattern layer is printed in a pre-stretched state with a deformation rate corresponding to the shrinkage. (3) The base film that is squeeze-molded between rolls has at least three layers: a release layer, an ink layer, and an adhesive layer.
After printing a pattern layer consisting of layers, press-bonding the base film to the outer surface of an exterior component with the pattern layer facing the exterior component, and then peeling off the base film and applying the pattern layer to the exterior component. A method for painting the outer surface of an exterior component by transferring the pattern onto the outer surface of the pattern layer, and then subjecting the surface of the pattern layer to a hardening treatment, the base film having its feeding direction perpendicular to each other during molding. A method for painting the surface of an exterior component, characterized in that it has a structure of a plurality of sheets pasted one on top of the other, and a painting layer is printed on the top of the structure.