JPH0767796B2 - Glass hot stamping method and heat retaining device used therefor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass hot stamping method for hot stamping a metal foil such as an aluminum foil on the surface of a glass plate, and a heat retaining device used for carrying out this method.

[0002]

2. Description of the Related Art Conventionally, when hot stamping an aluminum foil on the surface of a glass plate, the following method has been used. First, an acrylic paint (or something similar to it) is applied to the surface of the glass plate, and screen-printed with a one-component ink. Next, after the ink in the printed portion is semi-dried, aluminum foil is attached and then completely dried by a dryer.
As a result, the ink becomes an adhesive, and the aluminum foil can be hot-stamped on the printed portion.

However, in the conventional hot stamping method as described above, since the one-component ink is used, an acrylic transparent paint is applied to the surface of the glass plate in the initial step so that the ink is covered with the base material. Must be made.
Also, two drying steps are required. Thus, although the procedure is complicated, there is a problem that the adhesion is weak and the foil is easily peeled off.

[0004]

As described above, the conventional glass hot stamping method requires the steps of the base and the drying twice, which is troublesome and time consuming, and the foil is easily peeled off. there were.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a glass hot stamping method in which it is not necessary to form an underlayer, the number of drying steps is small, and the foil is not easily peeled off.

[0006]

In order to achieve the above object, a glass hot stamping method according to the present invention is a screen for a two-component ink in which a curing agent 1 is mixed with a medium 3 on the surface of a glass molded article. A first step of printing, a second step of completely drying the two-component ink printed on the surface of the glass molded article after completion of the first step, and a second step of this
After the step (3) is finished, the temperature of the surface of the glass molded article is maintained at about 50 ° C., and a third step of adhering an aluminum foil to the surface is provided.

[0007]

In the glass hot stamping method having the above structure,
An oxide film is formed on the surface of the glass molded product by directly screen-printing with the two-component ink in which the curing agent 1 is mixed with the medium 3 and then completely drying the ink. Furthermore, when the surface temperature of the glass molded product is kept at about 50 ° C. for several seconds, the oxide film on the ink surface is slightly melted and fine irregularities are formed on the surface. Therefore, an aluminum foil is brought into close contact with the surface and heat (about 250 ° C.) is applied to the extent that the aluminum foil is deformed. As a result, the aluminum foil is bonded only to the printed portion of the glass surface.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is for explaining steps of the glass hot stamping method according to the present invention, and shows a cross section of a finished product. In FIG. 1, reference numeral 1 is a glass plate, and a desired pattern is screen-printed on the surface of the glass plate 1 with the two-component ink 2 in the first step. This two-component ink is a type that mixes and uses a curing agent, and has the property that the layer can be made thicker and the hardness of the coating can be increased compared to the one-component ink that does not use a curing agent. . As the two-component ink 2, an epoxy-based 1000 type medium (transparent resin containing no pigment) commercially available from Toki Kako Co., Ltd. and a curing agent are mixed at a ratio of 3: 1. .

In the second step, the two-component ink 2 printed on the surface of the glass plate 1 is completely dried. In this step, if the ink is left for about 20 minutes while keeping the ambient temperature at around 150 ° C., the ink 2 has a uniform thickness and is cured without cracking as shown by the dotted line in the figure, and is oxidized on the surface. It was confirmed by experiments that a film was formed.

In the third step, the surface temperature of the glass plate 1 is adjusted to 50
Hold around ℃. As a result, the oxide film on the surface of the ink 2 is slightly melted, and as shown by the solid line in the figure, fine irregularities are formed on the ink surface, that is, roughness is generated. In this state, when the aluminum foil 3 is brought into close contact with the surface of the glass plate 1 and heat of about 250 ° C. is applied, the aluminum foil 3 is deformed along the fine irregularities formed on the surface of the ink 2. Therefore, the aluminum foil 3 is more firmly bonded to the surface of the glass plate 1 in combination with the adhesive effect of the ink 2. After that, it is finished if it is naturally dried. Glass plate 1
It was confirmed by experiments that the degree of adhesion of the aluminum foil 3 was good when the surface temperature of was accurately maintained at 45 ° C to 50 ° C.

In the third step, particularly when the glass plate 1 is a cylindrical glass container such as a glass bottle, it is very difficult to maintain the surface temperature at 45 to 50 ° C. with high accuracy. . In order to solve this problem, a heat retaining device as shown in FIGS. 2 and 3 is provided. FIG. 2 shows the structure, and FIG. 3 shows the configuration of the electric system. 2 and 3, the same parts are designated by the same reference numerals.

Reference numerals 11 and 12 denote a pair of rollers each having a surface made of stainless steel. These rollers 11,
Heaters 13 and 14 shown in FIG. 3 are inserted in the inside 12, and the rotation shafts thereof are rotatably supported by the support frame 15 so as to face each other so as to be parallel to each other in the longitudinal direction. Although not shown in detail, the rollers 11 and 12 are rotated in the same direction and at the same speed by the rotation driving device 16, respectively. Heaters 13 and 1 in the rollers 11 and 12
4 are connected to the power supply device 17 as shown in FIG. 3, and receive power supply from the device 17.

Thermometers 18 and 19 are attached to the surfaces of the rollers 11 and 12, respectively. These thermometers 18 and 19 detect the surface temperatures of the rollers 11 and 12, respectively, and output voltage signals corresponding to the detected temperatures. As shown in FIG. Sent to device 17. The power supply device 17 identifies the surface temperature of the corresponding rollers 11 and 12 from the voltage signals from the thermometers 18 and 19, and supplies the heaters 13 and 14 with the identified temperatures of 45 ° C to 50 ° C. The power supply is adjusted automatically.

A method of using the heat retaining device having the above structure will be described. First, after placing the cylindrical glass plate (glass container) 1 between the rollers 11 and 12 that has completed the second step, the rotary drive device 16 and the power supply device 17 are turned on. Then, the rotation driving device 16 is activated to cause the rollers 11, 12 to rotate.
Rotate in the same direction and at the same speed, so that the glass container 1 also rotates along this. At this time, since power is supplied to the heaters 13 and 14 by starting the power supply device 17, the heaters 13 and 14 generate heat and the surface temperatures of the rollers 11 and 12 rise. The surface temperature information of each of the rollers 11 and 12 is fed back to the power supply device 17 through the thermometers 18 and 19, and the power adjustment function of this device 17 causes the roller 1
The surface temperature of Nos. 8 and 19 is maintained at 45 to 50 ° C. For this reason, the glass container 1 in contact with the rollers 11 and 12 is also 45
Hold at -50 ° C.

In this state, the aluminum foil 3 is placed on the glass container 1.
The surface of the glass container 1 and the aluminum foil 3 are released by pressing the aluminum foil 3 with a rubber or a silicon roller having elasticity whose surface is warmed to about 250 ° C. The surface of and the aluminum foil 3 are brought into close contact with each other. By doing so, fine irregularities are formed on the surface of the ink 2 attached to the surface of the glass container 1, and the aluminum foil 3
Is deformed along the fine irregularities due to the heat of about 250 ° C., so that the ink is more strongly adhered to the surface of the glass container 1 together with the effect of adhering the ink 2.

As described above, in the glass hot stamping method according to the first to third steps, since the two-liquid ink 2 which can be screen-printed is directly used in the glass container 1, the base material made of the paint is prepared as in the conventional case. No need, ink 2
Since the aluminum foil 3 is deformed along the irregularities formed on the surface of the ink, the contact area between the ink 2 and the aluminum foil 3 becomes relatively large, and the effect that the aluminum foil 3 is less likely to be peeled off even after adhesive drying can be obtained. . Further, the workability can be improved by using the heat retaining device of FIG.

The present invention is not limited to glass containing a small amount of alkaline components (eg, tube bottles) that are considered to be relatively easy to print, but is not limited to glass containing a large amount of alkaline components (eg, automatic bottles) that were previously unprintable. ) Is also possible.

[0019]

As described above in detail, according to the present invention,
It is possible to provide a glass hot stamping method in which it is not necessary to form a base, the number of drying steps is small, and the foil is not easily peeled off.

[Brief description of drawings]

FIG. 1 is a sectional view for explaining each step of a glass hot stamping method according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a structure of a heat retaining device used in a second step in the method of FIG.

FIG. 3 is a block circuit diagram showing a configuration of an electric system of the heat retaining device of FIG.

[Explanation of symbols]

1 ... Glass, 2 ... Two-component ink, 3 ... Aluminum foil, 11, 1
2 ... Roller, 13, 14 ... Heater, 15 ... Support frame, 16
... Rotation drive device, 17 ... Power supply device, 18, 19 ... Thermometer.

Claims (3)

[Claims] 1. A first step of screen-printing on a surface of a glass molded article with a two-component ink in which a curing agent 1 is mixed with a medium 3, and a surface of the glass molded article after the completion of the first step. A second step of completely drying the two-component ink printed on the surface of the glass molded article; and, after the completion of the second step, while keeping the surface temperature of the glass molded article at about 50 ° C., an aluminum foil is adhered to the surface. And a third step of applying a temperature to such an extent that the aluminum foil is deformed, a glass hot stamping method. 2. The glass hot stamping method according to claim 1, wherein in the third step, the surface temperature of the glass molded product is maintained at 45 ° C. to 50 ° C. 3. In the case where the glass molded product is a cylindrical container, a pair of rollers in which a heater is inserted and arranged to face each other in parallel with each other in the longitudinal direction are the same as each other. A rotary drive device for rotating the heaters in the pair of rollers at the same speed, and a power supply device capable of adjusting the power supplied to the heaters in the pair of rollers, and the cylindrical glass container between the pair of rollers. 3. The glass hot stamping method according to claim 1, wherein the temperature of the glass container is adjusted so that the surface temperature of the glass container is about 50 ° C. Insulation device used in the process.