JPH04265748A - Glass hot-stamping method and heat-insulating device used for the same method - Google Patents

Abstract

PURPOSE:To obviate the manufacture of a foundation, to decrease drying processes and to prevent the peeling of a foil by holding the surface temperature of a glass plate, on which screen-printing is conducted by ink for two pack, at approximately 50 deg.C and fast sticking the aluminum foil on the surface of the glass plate while oxidizing an ink surface. CONSTITUTION:A desired design is screen-printed on the surface of a glass plate 1 by ink 2 for two pack, and printed ink 2 for two pack is dried completely. The glass plate 1 after drying is brought into contact with rollers 11, 12, surface temperatures of which in a heat-insulating vessel are held at approximately 45-50 deg.C. An aluminum foil 3 is placed on the glass plate 1 under the state, the aluminum foil 3 is pushed by a silicon roller, etc., a surface temperature of which is brought to a fixed temperature and which have resiliency, and the surface of the glass plate 1 and the aluminum foil 3 are fast stuck. Accordingly, fine irregularities are formed to the surface of ink 2 adhering on the surface of the glass plate 1, and the aluminum foil 3 is deformed along the fine irregularities by heat, thus bonding the aluminum foil 3 on the glass plate 1 more firmly in cooperation with the bonding effect of ink 2.

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 aluminum foil onto the surface of a glass plate, and a heat insulating device used when carrying out this method.

0002

2. Description of the Related Art Conventionally, when hot-stamping, for example, aluminum foil onto the surface of a glass plate, the following method has been used. First, acrylic paint (or something similar) is applied to the surface of the glass plate, and then screen printed with one-component ink. Next, after the ink on the printed area is semi-dry, aluminum foil is attached and the ink is completely dried in a dryer. This turns the ink into an adhesive that allows the aluminum foil to be hot stamped onto the printed area.

However, in the conventional hot stamping method as described above, since a one-component ink is used, an acrylic transparent paint is applied to the surface of the glass plate in the initial process, and a base layer is prepared so that the ink can be applied. must be made. Moreover, two drying steps are required. Although the procedure is complicated, there is a problem that the adhesive is weak and the foil easily peels off.

0004

[Problems to be Solved by the Invention] As stated above, the conventional glass hot stamping method requires a base step and two drying steps, which is time-consuming and labor-intensive, and also has the problem that the foil easily peels off. there were.

The present invention was made to solve the above problems, and its object is to provide a glass hot stamping method that does not require the preparation of a base, requires fewer drying steps, and in which the foil is less likely to peel off.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the glass hot stamping method according to the present invention includes a first step of screen printing on the surface of a glass plate with a two-component ink, and a first step of screen printing with a two-component ink. After completion of the process, there is a second step of completely drying the two-component ink printed on the surface of the glass plate, and after the completion of this second process, the surface temperature of the glass plate is maintained at around 50°C and the surface of the ink is and a third step of oxidizing the aluminum foil and adhering the aluminum foil to the surface of the aluminum foil.

[0007]

[Operation] In the glass hot stamping method with the above configuration, after directly screen printing the surface of the glass plate with two-component ink, the ink is completely dried, and the surface temperature of the glass plate is lowered to 50%.
While maintaining the temperature around 0°C to oxidize the ink surface, aluminum foil is brought into close contact with the ink surface, and heat at 250°C is applied to bond the ink.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is for explaining the steps of the glass hot stamping method according to the present invention, and shows a cross section of a finished product. In FIG. 1, 1 is a glass plate, and in a first step, a desired pattern is screen printed on the surface of the glass plate 1 using two-component ink 2. The two-component ink 2 is an epoxy Jujo-Kaku 1000 type, and is a mixture of 3 medium and 1 hardening agent.

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

In the third step, the surface temperature of the glass plate 1 is increased to 50°C.
Keep around ℃. As a result, the surface of the ink 2 is oxidized, and the ink surface becomes finely uneven, that is, rough, as shown by the solid line in the figure. In this state, the aluminum foil 3 is tightly attached to the surface of the glass plate 1, and
When heat of about 0.degree. C. is applied, the aluminum foil 3 deforms along the fine irregularities formed on the surface of the ink 2. Therefore, together with the adhesive effect of the ink 2, the aluminum foil 3 becomes more firmly adhered to the surface of the glass plate 1. After that, just let it air dry and you're done. It has been confirmed through experiments that the degree of adhesion of the aluminum foil 3 is good when the surface temperature of the glass plate 1 is accurately maintained at 45° C. to 50° C.

By the way, in the third step, especially when the glass plate 1 is a cylindrical glass container such as a glass bottle, it is very difficult to accurately maintain the surface temperature at 45° C. to 50° C. . In order to solve this problem, a heat retention device as shown in FIGS. 2 and 3 is provided. FIG. 2 shows its structure, and FIG. 3 shows its electrical system configuration. Note that in FIGS. 2 and 3, the same parts are denoted 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,
12 has heaters 13 and 14 shown in FIG. 3 inserted therein, and are rotatably supported by the support frame 15 with their rotating shafts facing each other so as to be parallel to each other in the longitudinal direction. The rollers 11 and 12 are rotated in the same direction and at the same speed by a rotary drive device 16, although details are not shown. Heaters 13 and 1 in the rollers 11 and 12
4 are each connected to a power supply device 17 as shown in FIG. 3, and receive power from the device 17.

Thermometers 18 and 19 are attached to the surfaces of each roller 11 and 12, respectively. These thermometers 18 and 19 detect the surface temperature of each roller 11 and 12, respectively, and output a voltage signal corresponding to the detected temperature, and these voltage signals are both connected to the above-mentioned power supply as shown in FIG. It is sent to device 17. This power supply device 17 identifies the surface temperature of the corresponding roller 11, 12 from the voltage signal from each thermometer 18, 19, and supplies power to each heater 13, 14 so that the identified temperature is 45°C to 50°C. The power supply is automatically adjusted.

[0015] A method of using the heat retaining device having the above structure will be explained. First, after placing the cylindrical glass plate (glass container) 1 that has undergone the second step between the rollers 11 and 12, the rotation drive device 16 and the power supply device 17 are turned on. Then, the rotation drive device 16 is activated and the rollers 11 and 12 rotate in the same direction and at the same speed, and the glass container 1 also rotates accordingly. At this time, power is supplied to the heaters 13 and 14 by activation of the power supply device 17, so the heaters 13 and 14 generate heat, and the surface temperature of the rollers 11 and 12 increases. The surface temperature information of each roller 11, 12 is fed back to the power supply device 17 through thermometers 18, 19, and the power adjustment function of this device 17 allows the roller 18
, 19 is maintained at 45-50°C. For this reason, the glass container 1 in contact with the rollers 11 and 12 is also
It is maintained at 50°C.

In this state, aluminum foil 3 is placed on top of the glass container 1.
By pressing the aluminum foil 3 with an elastic rubber or silicone roller whose surface has been heated to about 250°C, the air between the surface of the glass container 1 and the aluminum foil 3 is released, and the glass container 1 The surface of the aluminum foil 3 is brought into close contact with the aluminum foil 3. In this way, the surface of the ink 2 adhering to the surface of the glass container 1 will have fine irregularities, and the aluminum foil 3
is deformed along its fine irregularities by heat of about 250° C., and together with the adhesive effect of the ink 2, it becomes more firmly adhered to the surface of the glass container 1.

As described above, the glass hot stamping method according to the first to third steps uses the two-component ink 2 that can be screen printed directly on the glass container 1, so it is not necessary to prepare a base with paint as in the conventional method. There is no need for it, and the drying process only needs to be half-dry during the drying process, so there is less buildup.Furthermore, since the aluminum foil 3 deforms along the unevenness formed on the surface of the ink 2, the ink 2 and the aluminum foil 3 are relatively dry. The contact area of the aluminum foil 3 is increased, and the aluminum foil 3 is difficult to peel off even after the adhesive is dried. Furthermore, by using the heat retaining device shown in FIG. 2, the workability can be improved.

The present invention is applicable not only to glass with a low alkaline content that is relatively easy to print on (for example, tube bottles), but also to glass that has a high alkali content that has been considered unprintable (for example, automatic bottles). ) can also be implemented.

[0019]

[Effects of the Invention] As detailed above, according to the present invention,
It is possible to provide a glass hot stamping method that does not require the preparation of a base, requires fewer drying steps, and in which the foil does not easily peel off.

[Brief explanation of the drawing]

FIG. 1 is a cross-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 the structure of a heat retention device used in the second step in the method of FIG. 1.

FIG. 3 is a block circuit diagram showing the configuration of an electrical system of the heat-retaining device shown in FIG. 2;

[Explanation of symbols]

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

Claims (4)

[Claims] 1. A first step of screen printing with a two-component ink on the surface of a glass plate, and a second step of completely drying the two-component ink printed on the surface of the glass plate after the first step. After the second step, the temperature of the surface of the glass plate is maintained at around 50° C. to oxidize the surface of the ink, and a third step is to adhere aluminum foil to the surface. How to hot stamp glass. 2. The glass hot stamping method according to claim 1, wherein the two-component ink is an epoxy type Jujo Kakyou 1000 type in which 3 parts of medium and 1 part of hardening agent are mixed. . 3. The glass hot stamping method according to claim 1, wherein in the third configuration, the temperature at which the surface of the glass plate is maintained is 45° C. to 50° C. 4. In the case where the glass plate is a cylindrical container, a heater is inserted therein, and a pair of rollers are disposed facing each other so as to be parallel to each other in the longitudinal direction, and the pair of rollers are moved in the same direction. a rotational drive device that rotates the rollers at the same speed; and a power supply device that serves as a power source for the heaters in the pair of rollers and whose power supply can be adjusted;
The cylindrical glass container is placed between the pair of rollers and rotated, and the heater temperature is adjusted by the power supply device so that the surface temperature of the glass container is set at around 50°C. Item 1. A heat-retaining device used in the third step of the glass hot stamping method according to item 1.