JPH022412B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for integrally forming a three-dimensional and beautiful display section such as letters and patterns on the surface of a synthetic resin base material.

For example, marks, manufacturer names, model names, etc. are displayed on the rear surface of the saddle of motorcycles, etc., but conventionally most of these have been printed. However, the surface of this type of saddle often has a grained pattern like vinyl leather, making it difficult to print and without risk of peeling or flaking during use. In addition, in order to make this display part stand out three-dimensionally, attempts have been made to create borders using double printing, but while this requires the preparation of two types of original printing plates or two printing processes, it is difficult to The incidence of defective products is high, and the intended purpose is not always achieved.

Therefore, in view of this situation, this invention is
The present invention proposes a new method that can reliably and easily form a three-dimensional and beautiful display section.
In principle, this invention utilizes welding of synthetic resin using high frequency current. Further, by using a plurality of synthetic resin sheets as display members and making different synthetic resin sheets appear in the display section, a three-dimensional and highly aesthetic display section is formed. In addition, the external outline of the display part is determined by the height of the entire display part, and an unusual recessed part with an inner bottom surface higher than the surface of the base material is formed within the display part. In some cases, letters with three-dimensional borders can be formed to stand out. A detailed description will be given below with reference to the attached drawings.

FIG. 1 is a plan view showing an example of a display section formed by the method of the present invention, and here an example is shown in which characters are formed as a display section on the surface of the saddle cover of the above-mentioned motorcycle. The saddle cover serving as the base material 10 is made of a vinyl chloride resin sheet, or the back side of this is lined with a foamed resin sheet such as urethane foam, cloth, etc., and the surface has a grain pattern. Display section 11 is "I"
Each alphabetic letter such as “N” and “O” are placed side by side to make “I”
Cross-sectional views of "O" are shown in FIGS. 2 and 3, respectively. As shown in the figure, each display section 11A, 11B consists of upper and lower display members 12, 13, of which the upper display member 12 is made of, for example, white synthetic resin as the border 14 of each character, as shown in FIG. The lower display member 13 is made of, for example, red synthetic resin as a portion defining the character-shaped surface 15. Each of the display members 12 and 13 is made of, for example, a vinyl chloride resin sheet, and it goes without saying that a resin that is the same type or compatible with the base material 11 is preferable.

Next, the method for forming the display portion of the present invention will be explained with reference to the drawings from FIG. 4 onwards.
This is an example of forming a . First, as shown in FIG. 4, a sheet-like synthetic resin display member 13 of a desired color forming a display section 11 is placed on the upper surface of a synthetic resin base material 10 such as a saddle cover placed on a lower electrode 20.
12 is laminated and polymerized. When forming a display section on a curved surface such as a saddle cover, the lower electrode 20
The shape may be configured as a curved surface.

The high-frequency machining jig 21 is configured as an upper electrode, and has an outer crimping surface 22 for forming a border 14 of a predetermined shape and a non-crimping recess 23 corresponding to the character-shaped surface 15 surrounded by the outer crimping surface 22. have A peripheral blade 24 having a height substantially the same as the overall thickness of the display members 12, 13 is connected to the outer edge of the outer peripheral crimping surface 22, and a peripheral blade 24 having a height substantially the same as the overall thickness of the display members 12, 13 is connected to the inner edge of the display member 12, 13. Among them, an inner circumferential blade 25 having substantially the same height as the thickness of the upper display member 12 is continuously provided. In addition, this high frequency machining jig 21
Needless to say, when the lower electrode 20 is formed into a curved shape as described above, it is formed in a corresponding relationship.

As shown in FIG. 5, the processing jig 21 configured in this way descends onto the display members 12 and 13 laminated and polymerized on the upper surface of the base material 10 and is pressed against them. The outer peripheral blade 24 provided on the outer edge of the outer peripheral crimping surface 22 of the tool 21 is connected to the display member 12,
13, it passes through the display members 12 and 13 and reaches the upper surface of the base material 10, as shown in the figure. In addition, the outer crimping surface 2
Since the inner circumferential blade 25 provided on the inner edge of 2 is configured to have approximately the same height as the thickness of the upper display member 12, it passes through the upper display member 12 and touches the upper surface of the lower display member 13. reach.

On the other hand, when the processing jig 21 descends to the predetermined height position as described above, a high frequency current is applied between the processing jig 21, which is the upper electrode, and the lower electrode 20, due to the operation of a limit switch (not shown), for example. Each display member 1 corresponding to the outer circumferential crimping surface 22
2, 13 and the base material 10 portion are welded together.

When the processing jig 21 is raised after welding, the parts of each display member 12 and 13 that do not correspond to the outer crimping surface 22 become non-welded parts, and the outer periphery blades 24 and This is the portion cut by the peripheral blade 25. Therefore, by removing these excess display material portions 19, 19, . . . as shown in FIG. 6, a predetermined display portion 11 can be obtained.

In the illustrated embodiment, for convenience of explanation, the letter "I", which is the simplest display section, has been described, but the same applies to the arrangement of letters, figures such as marks, patterns, etc. In addition, display materials are not only two-layered but also three-layered.
It is also possible to have more than layers.

As explained above, according to the present invention, a three-dimensional and beautiful display area can be reliably and easily created simply by pressing together multiple layers of sheet-like synthetic resin display materials using a predetermined processing jig and applying a high-frequency current. It is now possible to form a In particular, according to the present invention, the character display area can be bordered as described in the embodiments, and character display surfaces of different colors and different heights can be created on the inner surface, so that a distinctive three-dimensional effect can be obtained. In addition, since this invention uses high-frequency current to perform bonding, it has many advantages, such as being able to easily and firmly form a display area even on the grained surface of vinyl leather, etc., which was difficult to print on in the past. It is something that has.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an example of a display section formed by the method of the present invention, and FIG. 2 is a 2-2 diagram in FIG.
The cross-sectional view along the line, Figure 3, is also 3-- in Figure 3.
3, and FIGS. 4 to 6 are cross-sectional views showing an embodiment of the method of the present invention in the order of the figures. Figure 6 shows the state after crimping. 10...Synthetic resin base material, 11...Display section, 12,1
3...Sheet-like synthetic resin display member, 14...Edging portion, 15...Character display surface, 20...Lower electrode, 21...
High frequency processing jig (upper electrode), 22...outer crimping surface,
23...Non-crimping recess, 24...Outer peripheral blade, 25...Inner peripheral blade.

Claims (1)

[Claims] 1 Laminating and polymerizing a plurality of sheet-like synthetic resin display members on the upper surface of the synthetic resin base material placed on the lower electrode;
The outer crimping surface has a predetermined shape and a non-crimping recess surrounded by the outer crimping surface, and the outer edge of the outer crimping surface has an outer rim having substantially the same height as the overall thickness of the display member. A high-frequency machining jig is provided in which an inner peripheral blade having a height substantially the same as the thickness of at least the uppermost layer of the display member is continuously provided on the inner edge of the outer peripheral crimping surface on which the blade is continuously provided. The upper electrode is pressed and welded by applying a high frequency current; after that, the excess portion of the display member cut by the outer peripheral blade and the inner peripheral blade of the processing jig is removed, and the predetermined display portion is attached to the base material. A method for forming display parts such as letters and patterns on a synthetic resin base material, characterized in that the display parts are formed integrally on the surface.