JPH0692015A - Method for forming mark in sheet of lens - Google Patents

Abstract

(57) [Abstract] [Objective] The method for forming a mark-shaped groove 1a in a plate-shaped lens 1 and hot stamping a hot stamp sheet 3 in the mark-shaped groove to indicate a mark is improved, It enhances the stereoscopic effect and brightness of the mark, and also makes it possible to control the color tone of the entire plate lens that shows the mark. [Structure] An over-stamp prevention groove 1b is provided around the mark-shaped groove 1a to form a sharp edge E at the boundary between both grooves.
Are formed (FIG. 1A). After pressing the hot stamp sheet 3 as shown in (B), a colored clear coating film 9 is formed on the back surface of the hot stamp sheet as shown in (C).
(D) As shown in the figure, the backside colored coating film 12 is formed around the hot stamp sheet 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of marking a mark having a stereoscopic effect on the surface of a transparent plate member.

[0002]

2. Description of the Related Art As a technique for displaying a mark composed of characters, symbols, figures or a combination thereof having a three-dimensional effect on the surface of a plate-shaped lens, a mark-shaped groove is formed on the surface of the plate-shaped lens. A technique of forming a metal thin film on the inner surface of the groove by using a vacuum evaporation method is known. According to this technique, a mark having a metallic color tone and metallic luster is three-dimensionally displayed. However, this vacuum vapor deposition process is complicated in process and generally a. Concave surface undercoat (mask coating), b. Dry curing, c. Concave surface vacuum vapor deposition (mask vapor deposition process) d. Concave top coat (mask coating), e. Dry cure, f. Over deposition removal (alkali cleaning), g.
Repeated washing with water, h. Washing with pure water, i. Drain and dry, j. Coloring treatment other than the concave portion, k. Since it has to undergo a process such as dry curing, the yield is poor and the manufacturing cost is high. In addition to the above-described vacuum vapor deposition, insert molding technology is also known, but the foil film is expensive and there are many restrictions on the shape of the molded product. There is a method using a hot stamp as a technique that can display a three-dimensional mark relatively easily. FIG. 2 is an explanatory view of the process. As shown in FIG. 2A, a mark-shaped groove 1a is provided in advance on one surface of the transparent plate lens 1. The groove 1a has a shallow V-shape in cross section. The hot stamp sheet 3 is pressed in the direction of arrow P toward the mark-shaped groove 1a by the marking jig provided with the chevron portion 2a corresponding to the V-shape, as shown in FIG.
As you can see, the mark shape is transferred. In this case, as shown in FIG. 2B, if the angle ψ of the concave surface of the groove 1a and the angle ψ of the chevron convex surface of the marking jig 2 do not exactly match,
Problems such as tearing of the hot stamp sheet 3 occur. In order to prevent such a problem, the method shown in FIG. 3 is effective. The marking jig 4 shown in FIG. 6A is made of an elastically deformable material, and the angle φ of the chevron portion 4a is formed.
Is slightly smaller than the angle θ of the valley of the mark-shaped groove 1a. When hot stamping is performed using the marking jig 4 as described above, the central portion of the hot stamping sheet abuts the hot stamp sheet 3 and the plate-like lens 1 in the initial stage as shown in FIG. 3B. (C) while pushing out sideways, the chevron portion of the marking jig 4 elastically deforms to the same apex angle as the angle θ of the groove 1a, and the hot stamp sheet 3
Stick to each other through. This method was created by the present inventor, and the present applicant has yet to file an unknown invention (Japanese Patent Application No.
164307).

The inventors of the present invention continued the practical application test after the application of the invention of the above-mentioned prior application and confirmed sufficient practical effects. However, it was confirmed that there is room for improvement as described below. did. FIG. 4 is an explanatory diagram thereof. As shown in (A), the plate-shaped lens 1 has a mark-shaped groove (a T-shaped groove in this example). The BB cross section is shown in FIG. The mark-shaped groove 1a has a shallow V shape. The shaped lens 1 may be a flat lens as shown in FIG. 1B or a prism lens as shown in FIG. In any case, when the hot stamp sheet 3 is placed on the shallow V-shaped groove 1a and hot stamping is performed by the procedure described with reference to FIG. As shown by the phantom line in C), the overstamp portion 3a protruding from the shallow V-shaped groove 1a
Occurs. If you can over stamp like this,
Like the over-stamp 3a shown by a virtual line in FIG. 4 (A), the contour of the mark shape becomes irregular, which significantly reduces the commercial value. In order to eliminate the above problems, FIG.
It is effective to provide the over-stamp prevention groove 1b shown in FIG. This configuration is a device created by the present inventor and is in the process of applying separately (Actual Application No. 4-62442, hereinafter referred to as the device of the prior application), and (A) is an embodiment of the device of the earlier application. Is a plan view, and (B) is a BB cross-sectional view thereof. The present embodiment is an improvement of the conventional example shown in FIG. 4 by applying the invention of the prior application, and the same reference numerals as those in FIG. 4 are the same as or similar to those in the conventional example. Is a constituent part of. Next, FIG. 5 is different from FIG. 4,
That is, the points improved by applying the invention of the prior application will be described. A groove 1b for preventing overstamp is provided along the periphery of the mark-shaped groove 1a. As a result, a sharp edge E is formed at the boundary between the mark-shaped groove 1a and the over-stamp preventing groove 1b. Therefore, when the hot stamp sheet 3 is pressed by the elastic marking jig 4 according to the procedure described with reference to FIG. 3, the portion of the hot stamp sheet 3 protruding from the mark-shaped groove 1a has the above-mentioned sharp edge E. It is sandwiched between the engraving jig 4 and the engraving jig 4 and cut to prevent over-stamping. Moreover,
When the plate-shaped lens shown in FIG. 6B is viewed from the direction of arrow F, the contour of the marked mark can be seen more prominently due to the action of the over-stamp preventing groove 1b. Further, even if a small amount of overstamp remains without being cut by the edge E, the overstamp is not conspicuous due to the refraction in the overstamp prevention groove 1b. FIG. 5 shows an example in which the invention of the prior application is applied to the flat plate lens 1. Although not shown, even when the mark-shaped groove 1a is provided on the prism lens as shown in FIG. 4C and hot stamping is performed, the groove for over-stamping is provided according to the embodiment of FIG. By
Similar actions and effects are obtained. The mark-shaped groove 1a in FIG. 5 has a shallow V-shaped cross-section, but the function and effect of the present invention are that the sharp groove formed at the boundary between the mark-shaped groove 1a and the over-stamp prevention groove 1b. Edge E
Therefore, the bottom of the mark-shaped groove 1a has a rounded shape (that is, a U-shape with a shallow cross section).
However, overstamping is prevented by the same action and effect as in the above-mentioned embodiment.

[0004]

The invention of the prior application solves the technical difficulty of the marking jig in hot stamping, and the invention of the earlier application can prevent the adverse effects of over-stamping. However, the above-mentioned improvement has not yet been considered in terms of color adjustment. That is, for example, in the case where a plate-shaped lens on which a three-dimensional effect mark is marked is installed side by side with a stop lamp of an automobile, a portion other than the three-dimensional mark is made orange in order to have a uniform color tone when requested from the design side. Is requested. Further, it is desired to give a mark having a three-dimensional effect not only the metallic color of the hot stamp but also some color tone. The present invention has been made in view of the above circumstances, and further improves a plate-shaped lens showing a mark having a three-dimensional effect to make a mark-shaped portion and a portion other than the mark-shaped portion (mark-shaped portion). It is an object of the present invention to provide a method capable of arbitrarily controlling the color tone of the surrounding area).

[0005]

Means for Solving the Problems Regarding the marking method of the mark according to the present invention created to achieve the above object,
The outline is as follows with reference to FIG. 1 corresponding to the embodiment. That is, the plate-shaped lens 1 shown in FIG.
Is provided with a mark-shaped groove 1a, and is provided with an over-stamp prevention groove 1b of the invention of the prior application (described above with reference to FIG. 5). Desirably, a paint is injected in advance into the over-stamp preventing groove 1b to form a colored coating film 6 in advance. Then, as shown in FIG. 3B, the invention according to the prior application is applied (as described above with reference to FIG. 3) and hot stamping is performed by the elastic marking jig 4, and then (C).
As shown in the figure, a colored clear coating film 9 is formed on the hot stamp sheet 3, and as shown in FIG. 7D, the back side colored coating film 12 is formed around the hot stamp sheet 3 except the hot stamp sheet 3. The order of the steps (C) and (D) can be exchanged. As a means based on the above principle,
According to the method of marking a mark of the present invention, a mark-shaped groove having a V-shaped or U-shaped cross section is provided on the surface of a transparent plate lens, and a transparent or semi-transparent hot stamp sheet is provided on the inner surface of the groove. In a lens that has been pressed to display a mark,
A groove different from the above is provided along the contour of the mark-shaped groove having a V-shaped or U-shaped cross section, and a hot stamp sheet is pressed against the inner surface of the mark-shaped groove. Step, a step of forming a colored clear coating film on the hot stamp sheet pressed and attached to the inner surface of the mark-shaped groove, and excluding the mark-shaped portion where the hot stamp sheet is pressed and attached And a step of forming a back surface coating film on the periphery thereof.

[0006]

According to the above method, the hot stamping does not interfere with the effect of the invention of the earlier application (elimination of the technical difficulty of the marking jig) and the effect of the invention of the earlier application (prevention of adverse effects of overstamping). The color tone can be arbitrarily controlled by the colored clear coating film formed on the back surface of the above and the colored coating film on the back surface formed around the colored clear coating film, which enhances the design value.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of the present invention.
(D) is a schematic process drawing. The plate-shaped lens 1 shown in FIG. 5A is provided with an over-stamp prevention groove 1b according to the invention of the earlier application described with reference to FIG. Coloring paint is injected into the groove from the nozzle 5 to form a coating film 6 on the bottom of the groove. However, it is also possible to omit this step (A) and form a coating film on the groove bottom in the step (D) described later. Next, as shown in FIG. 3B, by applying the invention of the earlier application described with reference to FIG. 3, the hot stamp sheet 3 is pressed by the stamping jig 4 having elasticity as shown by an arrow P,
The hot stamp sheet 3 is fixed to the inner surface of the mark-shaped groove 1a. The hot stamp sheet of this embodiment is made of a metal foil having a light transmittance of 75 to 95%. When carrying out the present invention, the transmittance can be set arbitrarily. Next, as shown in FIG. 3C, the hot stamp sheet 3 pressed and fixed to the inner surface of the mark-shaped groove 1a.
Around the hot stamp sheet 3 with a spray gun 8 and a colored clear coating film 9
To form a film. Then, as shown in (D), the colored clear coating film 9 covering the hot stamp sheet 3 is covered with a mask jig 10, and the spray gun 8 is moved in the directions of reciprocating arrows L and R while the hot mark shape is hot. A backside colored coating film 12 is formed around the stamp sheet 3. When the step (A) described above is omitted, the coating film 6'is formed on the groove bottom of the overstamp prevention groove 1b in the step (D). Further, when carrying out the present invention, the above (C),
The order of the step (D) may be changed. As shown in FIG. 1 (D), the plate-shaped lens marked with the mark by the above method has a colored clear coating film formed on the back side (upper side in the figure) of the mark-shaped hot stamp sheet 3. In addition, a backside colored coating film 12 is formed around the mark-shaped hot stamp sheet 3. For this reason, sunlight is reflected on the surface of the hot stamp 3 at the time of turning off the light in the daytime, and the mark has a three-dimensional effect and a bright feeling, and the action of the over-stamp prevention groove 1b and the coating films 6, 6'on the groove bottom. The contour of the mark shape stands out, and the three-dimensional effect is further emphasized. Further, since the back surface colored coating film 12 is formed on the transparent plate lens 1 around the mark-shaped hot stamp sheet 3, the desired appearance color tone is exhibited and the design value is improved. At the time of lighting at night, light emitted from a light source (not shown) passes through the colored clear coating film 9 to become colored light, and passes through the hot stamp sheet 3,
Make the colored three-dimensional mark shape stand out. Then, since the periphery of the three-dimensional mark is covered with the back surface colored coating film 12, light is blocked or colored to make the above-mentioned three-dimensional mark indication stand out.

[0008]

As described above, in the marking of a three-dimensional mark by the method of the present invention, the color tone of each of the mark-shaped portion and its surroundings can be arbitrarily controlled, and the degree of freedom of design creation is high. In addition, it has an excellent practical effect that various designs can be constructed and the stereoscopic effect and brightness feeling of the mark-shaped portion can be further enhanced. In addition, the cost is significantly lower than that of the vacuum deposition method according to the related art, and the product yield is good.

[Brief description of drawings]

FIG. 1 shows one example of the present invention, in which (A) to (D) are schematic process explanatory diagrams.

FIG. 2 is a process explanatory diagram of an operation of providing a mark-shaped groove on a plate lens and performing hot stamping.

FIG. 3 is a view in which an angle is entered in a sectional view for explaining a hot stamping method according to an unknown invention.

FIG. 4 is a cross-sectional view for explaining over-stamping as a problem in hot stamping processing.

FIG. 5 is an explanatory view illustrating an embodiment of a device of the prior application for preventing over-stamping.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Plate lens, 1a ... Mark-shaped groove, 1b ... Over-stamp prevention groove, 2 ... Stamping jig, 3 ... Hot stamp sheet, 4 ... Elastic stamping jig, E ... Sharp edge,
6, 6 '... Coating on the bottom of the over-stamp prevention groove, 7 ... Mask jig, 8 ... Spray gun, 9 ... Colored clear coating, 1
0 ... Mask jig, 11 ... Spray gun, 12 ... Backside colored coating film.

Claims (1)

[Claims] 1. A mark-shaped surface of a transparent plate-shaped lens,
A lens in which a groove having a V-shaped or U-shaped cross section is provided and a mark is marked by pressing a transparent or semi-transparent hot stamp sheet on the inner surface of the groove, the mark-shaped V-shaped or U-shaped cross section is used. A groove different from the above is provided along the contour of the mark-shaped groove along the contour of the mark shape, and a step of pressing a hot stamp sheet against the inner surface of the mark-shaped groove, and the inner surface of the mark-shaped groove A step of forming a colored clear coating film on the pressed / attached hot stamp sheet, and a back surface coating film around the hot stamp sheet except for the mark-shaped portion which is pressed / attached The method for marking a mark on a plate-shaped lens, which comprises: