Cleaning device for liquid material ejection device and method for controlling roll rotation performed in the cleaning device

Abstract

The cleaning mechanism (1) provided on the liquid material ejection device (40) of the present invention includes: a scraper blade (21), which removes ink attached to the ejection surface; a roller (3), which Roller (3) is used to remove the liquid material on the scraper blade (21); And motor (8), this motor (8) is used to move above-mentioned scraper blade (21) from the position that abuts with above-mentioned ejection surface to be in contact with Where the above-mentioned roller (3) abuts, the above-mentioned roller (3) is configured to evenly abut against the above-mentioned doctor blade (21) when it abuts against the above-mentioned doctor blade (21), and the rotation of the above-mentioned roller (3) is controlled unit control. Accordingly, the present invention provides a cleaning device capable of cleaning the ejection surface of a liquid material ejection device with high reliability, eliminating damage to the ejection surface caused by cleaning, and achieving stable ejection. performance.

Description

technical field [0001] The present invention relates to a cleaning device of a liquid material ejection device and a roller rotation control method performed in the cleaning device. ) the liquid material attached to the discharge surface of the liquid material discharge device; and a cleaning unit for removing the liquid material obtained by scraping with a scraper blade from the above discharge surface, and in particular relates to a cleaning A cleaning device in which the unit is always in uniform contact with the discharge surface doctor blade when the unit is in contact with the discharge surface doctor blade, and a roller rotation control method performed in the cleaning device. Background technique [0002] A liquid material ejection device such as an inkjet type has a nozzle plate formed with a plurality of nozzles for ejecting a liquid material, and ejects a liquid material (such as ink) from the ejection surface of the nozzle plate on which an ejection port is arran...

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Problems solved by technology

Since the shape of the discharge surface of the nozzle plate has a great influence on the discharge performance, if the discharge surface is damaged as described above, the discharge performance will be significantly reduced

[0015] In addition, even if the scraper blade of Patent Document 3 is brought into contact with the ejection surface of the nozzle plate, if the roller for cleaning the scraper blade is a sponge or a brush, it may cause damage to the scraper blade. Scraping may cause damage to the ejection surface

[0016] Moreover, when the components for cleaning the blade have a structure that absorbs the liquid material adhering to the blade like a sponge or a brush, the components need to be replaced frequently, and it is difficult to improve the cost performance.

[0017] On the other hand, when the rotating rollers arranged in contact with the nozzle plate in a non-contact state are arranged as in Patent Document 4, it is difficult to make the rotating rollers come into contact with the discharge surface with high precision, especially in the area of ​​the discharge surface. When it is large or touches multiple ejection surfaces at the same time, it is necessary to make the rotating roller contact the entire ejection surface evenly, so very high precision is required.

Therefore, the cost performance is low, and it is difficult to completely clean the ejection surface, so it can be said that the reliability of cleaning is poor.

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