Cleaning apparatus for discharge nozzle

Abstract

Aimed is to efficiently remove a coating solution existing at the tip end part of a discharge nozzle by a simple facility without using a large quantity of a washing liquid.A rotation roller 11 for holding a coating solution 22 discharged out of a slit type discharge port 21 at the tip of a discharge nozzle 20 is installed while being kept from the discharge nozzle and a blade 12 for removing the coating solution held on the outer circumferential face of the rotation roller is installed in a reciprocating manner in the axial direction of the rotation roller and a washing liquid supply apparatus 15 for supplying a washing liquid 14 to the outer circumferential face of the rotation roller is installed downstream of the blade in the rotation direction of the rotation roller. In a step of removing the coating solution from the rotation roller by the blade, the washing liquid supply to the rotation roller is stopped and on the other hand, in a step of supplying supplying a washing liquid to at least the outer circumferential face of the rotation roller, the blade is enabled to reciprocate and move in the axial direction of the rotation roller.

Description

[0001] The present invention is an invention based on the claim of priority of Japanese Patent Application No. 2006-308621. technical field [0002] The present invention relates to a nozzle cleaning device for cleaning a nozzle installed in a coating device for coating various coating liquids such as glass, resin film, metal foil, etc., and particularly relates to such a nozzle Cleaning device: After the coating liquid is supplied to the object to be coated from the slit-shaped discharge port provided at the front end of the nozzle for coating, the discharge port is provided during the period until the next coating. Clean the tip of the nozzle. Background technique [0003] Conventionally, when manufacturing plasma display panels, organic electroluminescence display panels, liquid crystal display panels, etc., coating liquids are applied to various substrates such as glass, resin films, and metal foils, respectively, by coating equipment. [0004] As such a coating device,...

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Problems solved by technology

In the state where the concentration of the coating liquid present at the tip of the nozzle has risen, once the next coating operation is performed, there is a problem that the object to be coated will be streaked due to the high-concentration coating liquid. The phenomenon of uneven coating, or the phenomenon of film cracking

[0010] However, in such a cleaning device, many devices are required to sufficiently remove the coating liquid supplied to the outer peripheral surface of the rotating roller, and there are problems of high cost and large size of the device, and in this case, there are also problems as follows: As mentioned above, in order to always spray new cleaning liquid from the new liquid spray nozzle to the outer peripheral surface of the rotating roller, a large amount of cleaning liquid is required, the operation cost is high, and the cleaning liquid needs to be treated after cleaning.

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