Cleaning unit of liquid material discharge device, and roller rotation control method implemented in cleaning unit

Abstract

A cleaning mechanism (1) provided in a liquid material discharge device (40) comprises a blade (21) for removing ink adhering to a discharge surface, a roller (3) for removing a liquid material from the blade (21), and a motor (8) for moving the blade (21) from a position where the blade abuts on the discharge surface to a position where the blade abuts on the roller (3). The roller (3) is configured to uniformly abut on the blade (21) and the rotation thereof is controlled by a control means while the roller is abutting on the blade (21). This provides a cleaning unit with which the dischargesurface of the liquid material discharge device can be cleaned with high reliability, the discharge surface is prevented from being scratched by cleaning, and with which stable discharging efficiencycan be realized.

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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