JPS595118B2 - Foam molding method for foam printed matter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for foaming foamed ink printed on the surface of a synthetic resin panel, for example, and the gist thereof is to provide a panel 2 on which unfoamed foamed ink 1 is printed on the surface of the panel.
Foaming of foamed printed matter characterized by blowing hot air onto the surface of a molded product such as the above by a hot air generation unit 3 to foam the foamed ink 1, and immediately sucking the hot air on the surface of the molded product by a hot air suction unit 4. This relates to the molding method.

Conventionally, after printing unfoamed foam ink on the surface of a material such as iron or paper whose softening temperature or ignition temperature is higher than the foaming temperature of the foam ink, this is placed in a heat drying oven. It was heated and foamed through. However, when a material such as a synthetic resin has a softening temperature lower than the foaming temperature of the foamed ink and is passed through a heat drying oven, the material deforms before the foamed ink foams. Also, the heat drying oven required a lot of energy to raise its temperature. The present invention has been made in view of the above-mentioned points, and its purpose is to foam ink printed on a material such as a synthetic resin whose softening temperature is lower than the foaming temperature of the foamed ink. To provide a foam molding method for foamed printed matter without the risk of the material being deformed due to heat.

The present invention will be explained in detail below with reference to the accompanying drawings.

What is shown in Figure 1 is the entire foaming device for foaming ink, which is roughly divided into hot air generator A and panel traveling device B.
and a cooling device C. As shown in FIG. 3, the panel traveling device B consists of a vertically rotating roller 5 and a bare horizontally rotating roller 6, and the vertically rotating roller 5 is rotatably supported.
One or both of the pair of horizontal rotating rollers 6 are rotationally driven. Then, as shown in FIG. 3, the lower surface of the panel 2 is placed on the vertically rotating rollers 5, and both sides of the panel 2 are held between the horizontally rotating rollers 6 and the panel 2 is conveyed in the feeding direction. It is something. Here, the interval between the horizontal rotation rollers 6 can be adjusted according to the thickness of the panel 25. Reference numeral 2 is a panel made of a synthetic resin extrusion molded product, and a decorative pattern is printed on both surfaces of the panel 2 using unfoamed foam ink 1.

As shown in FIG. 1, the panel 2 is conveyed in an upright position 30 by the panel traveling device B. The hot air generator A is a device for carrying out the method of the present invention, and has a configuration as shown in FIG.

That is, the hot air generating device A is an integrally formed central hot air generating section 3 and 35 hot air suction sections 4 provided adjacent to both sides of the hot air generating section 3. The vertically elongated openings 3a and 4a at the tip of the portion 4 are lined up flush. Compressed air is sent into the hot air generating section 3 from the air supply port 7 at the rear, and this compressed air is heated to a temperature higher than the foaming temperature of the foaming ink 1 by an electric heater (not shown) in the hot air generating section 3, and is heated to the opening. Hot air is blown out from 3a. The hot air suction unit 4 is connected to a suction device (not shown) using a fan, a pump, etc. via a suction duct 8, and the hot air blown from the hot air generation unit 3 is passed through the opening 4a to the hot air suction unit 4.
The compressed air or hot air thus flows through the path shown by the arrow in FIG. Reference numeral 9 denotes an air volume adjustment valve provided within the suction duct 8.

As shown in FIG.
Hot air is blown onto both sides of the panel, the foamed ink 1 is foamed, and a bulging decorative pattern is formed on the surface of the panel 2. The hot air blown out from the hot air generating section 3 is immediately sucked by the hot air suction section 4, so the hot air does not spread and the area in which the hot air hits the panel 2 is very narrow.
Even when the surface of the panel 2 is heated, the temperature inside the panel 2 does not increase, and even when hot air is blown onto the panel 2, the pressure on the surface of the panel 2 does not increase much. As a result, even the foamed ink 1 whose foaming temperature is higher than the softening temperature of the panel 2 can be foamed without deforming the panel 2. In this hot air generator A, the range in which the temperature of the panel 2 (711) is increased is approximately only about the width of the hot air generator 3. In other words, what is shown in FIG. 5 is an actual heat distribution graph), the horizontal axis is the distance X (11101) along the panel 2, and the vertical axis is the hot air temperature T (°C), which is approximately the temperature of the hot air generating part 3. The temperature is high only within the town wall, which has a width of a. This experiment was conducted under the following conditions. Width of tip of hot air generator A c-4
0I01n Rear end width d=70m [o Depth e
= 75 nm Height f = 901 m Width a of opening 3a of hot air generating section a = 20[111n Width b of opening 4a of hot air suction section 4 = 101rI[n Compressed air supplied to hot air generating section 3 0.5 ~1.0k9/d Power consumption of electric heater in hot air generator 3 2.4KW (AClOOV) Suction device Maximum air volume 5.3m3/Min Maximum static pressure
86[1101Aq The cooling device C generates fog and cools the panel 2 by spraying this fog onto the surface of the panel.The fog is generated by an ultrasonic humidifier or the like rather than something like steam. Low temperature steam is preferred.

This cooling device C is placed immediately after the hot air generator A, and immediately cools the panel 2 heated by the hot air generator A to prevent further deformation of the panel 2. Of course, the same process can be used to foam the foaming ink printed on one side of the panel, and the molded product is not limited to the panels described above, but can be of any type, such as groove-shaped or column-shaped. Also good.

In addition, when foaming the foaming ink 1 printed on both sides of the hollow panel 2, which is a molded product, as shown in FIGS. Cooling air 12 is blown into the hollow interior 11 of the panel 2 up to the front end opening 10b.
The panel 2 is cooled from 1 to prevent its deformation, and the pressure in the hollow interior 11 of the panel 2 is not lowered than the pressure on the surface of the panel 2.

As described above, the present invention blows hot air onto the surface of a molded product such as a panel on which unfoamed foamed ink is printed, and foams the foamed ink using a hot air suction unit. Because hot air from the surface is immediately sucked,
The hot air does not spread, the area where the hot air hits the panel is very narrow, and even though the surface of the panel is heated, the temperature inside the panel does not rise, and even when hot air is blown, the pressure on the panel surface does not increase. As a result, there is an advantage that even foaming ink whose foaming temperature is higher than the softening temperature of the panel can be foamed without deforming the panel.

Further, there is an advantage that the apparatus can be made smaller without requiring large-scale equipment such as a heat drying oven as in the conventional method.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a foaming device for foaming ink used in carrying out the present invention, Fig. 2 is a perspective view showing a hot air generator, Fig. 3 is a perspective view showing a panel traveling device, and Fig. 4 is a perspective view showing a foaming device for foaming ink used in carrying out the present invention. FIG. 5, a horizontal cross-sectional view for explaining the operation of the device, is a heat distribution graph of hot air. DESCRIPTION OF SYMBOLS 1... Foamed ink, 2... Panel, 3... Hot air generation part, 4... Hot air suction part.

Claims (1)

[Claims] 1 A hot air generator blows hot air onto the surface of a molded product such as a panel on which unfoamed foamed ink is printed to foam the foamed ink, and a hot air suction unit immediately sucks up the hot air on the surface of the molded product. A foam molding method for foamed printed matter, characterized by the following.