JPS6231184Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a roll coater for applying an adhesive.

[Background technology]

For example, when applying urethane-based adhesives, cleaning the application roll requires a large amount of solvent and time, and if the cleaning is incomplete, it may shorten the life of the application roll or reduce variations in the amount of application. There was a problem that caused this to occur. Also, clearance adjustment for adjusting the amount of coating requires skill because it is done while checking the balance using the left and right adjustment handles.

[Purpose of invention]

The present invention has been developed in view of the drawbacks of the conventional examples described above, and its purpose is to facilitate cleaning and clearance adjustment for adjusting the amount of application.

[Disclosure of invention]

The roll coater of the present invention fills a pressurized medium 2 such as gas or liquid in a coating roll 1 made of a rubbery elastic tube, and forms a release layer 3 on the surface of the coating roll 1. The apparatus is equipped with a pressure regulating means 5 for regulating the internal pressure, and a doctor roll 4 is disposed opposite to the coating roll 1, thereby achieving the above object.

Hereinafter, the present invention will be explained in detail with reference to the accompanying drawings. Reference numeral 1 denotes a coating roll made of a telescopic tube (rubber tube) made of pressure-resistant rubber, and a pressurized medium 2 such as gas (air) or liquid (water) is placed inside like a bag.
can be sealed. The coating roll 1 of this rubber tube has a uniform thickness, and a release layer 3 of a release film made of a stretchable material such as fluororesin is formed on the surface. The applicator roll 1 is rotatably supported at its center, and has a rotary joint 6 attached to its end. The pressure medium 2 in the application roll 1 can be pressurized or depressurized from there. Further, glue stopper plates 9 which also serve as a frame and whose diameter is larger than the outer diameter of the application roll 1 are fixed to both ends of the application roll 1 to prevent the adhesive 10 from leaking from both ends. This applicator roll 1 has a doctor roll 4.
are arranged opposite to each other, and a feed roll 11 is provided below.
is installed. However, Doctor Roll 4
A certain amount of adhesive 10 is placed on the applicator roll 1 according to the clearance d between the applicator roll 1 and the applicator roll 1, and is applied to the object to be coated, such as a board or sheet, which is fed between the applicator roll 1 and the feed roll 11. be. At this time, some adhesive 10 leaks, but this is recovered and circulated. If you want to change the amount of adhesive 10 applied, you can adjust the pressure of the pressurized medium 2 in the application roll 1 using the pressure controller 7, and the outer diameter of the application roll 1 will change, causing the doctor roll 4 and the application roll 1 to change. The clearance d can be adjusted without moving the . In addition, in order to control the viscosity of the adhesive 10, the application roll 1 is also
Just adjust the pressure inside.

After completing the work, apply adhesive 10 as shown in Figure 3a.
(in the case of a moisture curing type adhesive such as urethane adhesive, apply water and heat it), and apply the coating roll 1.
After removing the internal pressure of the coating roll 1 as shown in Fig. 3b,
This causes the adhesive 10 to deflate and peel off the cured adhesive 10.

The object coated with a moisture-curing adhesive such as a urethane adhesive is sent to the next step by a belt conveyor 12 as shown in FIG. 4 in this manner. The belt 13 of this belt conveyor 12 is a normal rubber belt 14 as shown in FIG.
The surface thereof is covered with a coating 15 having good mold releasability, such as fluororesin. Furthermore, a water spray 16 and a heater 17 are disposed below the belt 12, and the urethane adhesive 10 adhering to the belt 12 is sprayed with water by the water spray 16 as it passes below. It is heated and hardened by the heater 17. Then, when passing through a sharp bend 19 where the belt 12 is stretched at an acute angle by a small-diameter roll 18, it is vibrated by a diaphragm 20 and peeled off, and falls into a dust receptacle 21. Therefore, it is possible to prevent the hardened adhesive 10 from adhering to the object to be coated while it is being conveyed and causing a failure in the next process.

[Effect of idea]

Since the present invention is constructed as described above, it is possible to easily adjust the amount of adhesive applied and control the viscosity by adjusting the pressure inside the application roll using a pressure adjusting means such as a pressure controller.
Another advantage is that by deflating the applicator roll, the hardened adhesive can be easily peeled off and cleaned.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of the present invention;
The figure is a plan view of the same as above, Figures 3a and b are cross-sectional views showing a method of cleaning the coating roll of the above, Figure 4 is a schematic diagram showing the roll coater and subsequent belt conveyor system, and Figure 5 is a belt of the same as above. FIG. 6 is an enlarged view of the sharply curved portion of the same. DESCRIPTION OF SYMBOLS 1... Application roll, 2... Pressure medium, 3... Release layer, 4... Doctor roll, 5... Pressure adjustment means.

Claims (1)

[Scope of utility model registration request] A pressurized medium such as gas or liquid is filled in a coating roll made of a rubbery elastic tube, and a release layer is formed on the surface of the coating roll, and a pressure adjustment means is provided to adjust the pressure inside the coating roll. A roll coater consisting of a coating roll and a doctor roll.