Method and device for cleaning nozzles of alignment film printer

Abstract

The invention discloses a method for cleaning nozzles of an alignment film printer, which is used for automatically cleaning the nozzles of the alignment film printer, wherein the method comprises the following steps of directionally spraying a dissolving solution to the nozzles of the alignment film printer according to a certain moving path for dissolving liquid drops which are frozen on orifices of the nozzles, wherein the dissolving solution is sprayed and covered on all nozzles of the alignment film printer; and carrying out suction vacuum operation according to the moving path for sucking away the dissolving solution which is covered on surfaces of the nozzles. The invention also discloses a device for cleaning nozzles of the alignment film printer. The method and the device for cleaning nozzles of the alignment film printer provided by the invention are implemented to effectively prevent blocking phenomena of nozzles of the alignment film printer due to dry liquid drops; when promoting printing quality of the alignment film and yield of the product, the method and the device can further promote utilization of the alignment film printer and reduce the production cost.

Description

technical field [0001] The present invention relates to the field of alignment film printers, in particular to a cleaning method and device for preventing nozzle holes of alignment film printers from being blocked due to dry droplets. Background technique [0002] At present, the alignment film printer has been widely used in the coating project of the alignment film (Polyimide) of TFT-LCD. Its working principle is: the nozzle of the alignment film printing machine continuously sprays high-speed and high-density liquid droplets, so that the liquid droplets fall on the surface of the TFT array substrate or CF color film substrate, and the film surface is made uniform by the diffusion of surface tension. Flat to achieve film-forming effect. Specifically, dense and tiny nozzle holes are distributed on the nozzle of the alignment film printer, and the deformation of piezoelectric ceramics is controlled by voltage to squeeze out PI (polyimide) droplets from the nozzle holes on t...

AI Technical Summary

Problems solved by technology

[0003] 1. Since the nozzle hole on the nozzle is very small, when the alignment film printer is not working, the nozzle hole will be blocked due to the dryness of the PI liquid

And when the alignment film printing machine works again, the clogged nozzle holes will not be able to continue spraying PI droplets, resulting in printing quality defects

In addition, defective substrates will be peeled off the PI film and re-filmed, resulting in prolongation of production time and waste of PI solution

[0004] 2. At the same time, when working again, it is necessary to improve the clogged nozzle holes, wasting production time and PI liquid, and reducing the utilization rate of the alignment film printing machine

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