JPH0735478A - Air knife device - Google Patents

Abstract

PURPOSE:To prevent re-adhesion of mist and to prevent occurrence of a water mark by a method wherein an air knife opened to the opposite side to conveyance is installed in a state to be inclined based on a substance to be dried and suction ducts to effect suction are installed on the opposite side to conveyance in parallel to the air knife. CONSTITUTION:An air knife 2 communicated with a gas piping 5 is installed above a substance 1 to be dried in a state to be inclined based on the conveyance direction of the substance 1 to be dried. The air knife 2 has slits 8 for gas injection formed at intervals of a microdistance in a direction opposite to a conveyance direction and air ducts 3 and 9 having suction ports 10 and 11, respectively, opened to the air knife 2 side are arranged above the substance 1 to be dried in parallel to the air knife 2 and in the vicinity of the air knife 2 at a front and in the rear in a conveyance direction. Since rapid drying is practicable by blowing off water drops by means of jet gas, this constitution performs reliable drying through suction of mist.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air knife device.

[0002]

2. Description of the Related Art In a conventional device of this type, an inclined air knife 2 is installed above an object to be dried 1 such as a liquid crystal substrate as shown in FIG. An air intake duct 3 is installed on the side surface of the device to blow off the water droplets 4 and the like adhering to the article to be dried 1 with a jet gas for rapid drying.
The mist generated at this time was taken in by the intake duct 3 and exhausted. In the figure, 5 is a gas pipe, and 6 is an exhaust pipe, which communicates with the exhaust fan 7.

[0003]

In the above-mentioned conventional apparatus, since the intake duct 3 is installed on the side surface of the article to be dried 1 in the conveying direction, it is arranged relatively distant from the air knife. Therefore, there is a drawback in that the mist cannot be sufficiently sucked, and the mist is redeposited on the material to be dried and a watermark is generated. Therefore, the present invention is intended to provide an apparatus in which an intake duct is installed in the vicinity of an air knife to reliably suck and discharge mist.

[0004]

In order to solve the above-mentioned problems, the present invention installs an air knife open to the side opposite to the conveying side in a state of being inclined with respect to the material to be dried, and sucking air from the side opposite to the conveying side of the air knife. An air knife device in which an air intake duct for performing air intake is provided in parallel with the air knife, and an air intake duct for performing air intake on the transport side of the air knife is provided in parallel with the air knife.

[0005]

The present invention is configured as described above and blows off water droplets on the material to be dried by the jetting gas jetted from the air knife for rapid drying. The mist generated at this time is sucked by the air duct on the side opposite to the conveying side, and after passing through the air knife, it is sucked by the suction duct on the side for conveying to prevent reattachment of the mist.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described in detail with reference to FIGS. An air knife 2 communicating with the gas pipe 5 in a state of being inclined with respect to the conveyance direction of the material to be dried 1 is installed above the material to be dried 1. This air knife 2 is provided with a jetting slit 8 having a minute gap in the anti-conveyance direction, and the air knife 2 is provided in parallel with the air knife 2 before and after the conveyance direction side.
Intake dusts 3, 9 are installed above the article to be dried 1 in the vicinity of. The intake ducts 3 and 9 open intake ports 10 and 11 on the air knife 2 side, respectively.

Then, both sides of the air knife 2 and the intake ducts 3 and 9 are fixed to the fittings 12 and 12, respectively. It is designed to hold the positional relationship. Also, the intake duct 3
Is connected to the exhaust fan 7 via the exhaust pipe 6, and the intake duct 9 is connected to the exhaust fan 14 via the exhaust pipe 13.

The first embodiment is constructed as described above, and a jet gas such as air or nitrogen gas is jetted in the arrow direction from the jet slit 8 of the air knife 2 so that the water droplets 4 on the article to be dried 1 are ejected. Blow off and dry quickly. On the other hand, the intake ducts 3 and 9 on both sides intake air from the intake ports 10 and 11 by the blowers 7 and 14, respectively. Therefore, the mist is sucked from the intake port 10 of the intake duct 3, but a negative pressure is generated in the vicinity of the intake port 10, and the pressure of the injection gas injected from the injection slit 78 from the air knife 2 is reduced. In the same manner, the amount of gas to be injected is reduced, and the cost can be reduced by about 5% with respect to the gas.

Further, a slight amount of reattachment of mist due to intake air leakage is sucked into the surface of the material to be dried 1 after passing through the air knife by the intake duct 9, and the surface of the material to be dried 1 is made to have a negative pressure. To accelerate drying.

Next, the second embodiment will be described with reference to FIG. 3. In this embodiment, the air knife 2 is formed in a V shape when the portion 1 to be dried has a wide width, and the intake ducts 3, 9 are formed. Also V
It is shaped like a letter. Since all others are the same as in the first embodiment, the same reference numerals are given and the description thereof is omitted.

[0011]

The present invention has the constitution and operation as described above, and sprays water droplets to rapidly dry it.
Since the mist generated at this time is taken in by the intake duct which is opened in the vicinity, re-adhesion of the mist is prevented and no watermark is generated. Further, even after passing through the air knife, the suction is performed to suck the mist, so that the drying can be surely performed.

[0012]

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment of the present invention.

FIG. 2 is a vertical sectional view thereof.

FIG. 3 is a plan view of the second embodiment.

FIG. 4 is a plan view of a conventional device.

[Explanation of symbols]

 1 Dried Material 2 Air Knife 3 Intake Duct 4 Water Drop 5 Gas Pipe 6 Exhaust Pipe 7 Blower 8 Injecting Slit 9 Intake Duct 10 Inlet 11 Intake 12 Mounting Bracket

Claims (2)

[Claims] 1. An air knife opened to the side opposite to the conveying side in a state of being inclined with respect to the material to be dried, and an air intake duct for inhaling air on the side opposite to the conveying side of the air knife is provided in parallel with the air knife. A characteristic air knife device. 2. The air knife device according to claim 1, wherein an air intake duct for inhaling air is provided on the carrying side of the air knife in parallel with the air knife.