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Inkjet head cleaning device, cleaning method, and printing device

A cleaning device and inkjet head technology, applied in printing and other directions, can solve the problem of unstable ink ejection and achieve excellent printing quality

Active Publication Date: 2019-01-22
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, ink ejection becomes unstable

Method used

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  • Inkjet head cleaning device, cleaning method, and printing device
  • Inkjet head cleaning device, cleaning method, and printing device
  • Inkjet head cleaning device, cleaning method, and printing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0075] The inkjet head cleaning device, the inkjet head cleaning method, and the printing apparatus provided with the inkjet head cleaning device according to the embodiment will be described. The structure of the inkjet head of the embodiment and figure 1 The body piezo shown has the same head structure.

[0076]

[0077] Figure 4 (a)~ Figure 4 (e) is a diagram showing the flow of sucking the ink droplets 402 adhering to the nozzle plate 404 in Embodiment 1 using the cleaning device 403 . The nozzle plate 404 is a part on which the nozzles are exposed on the surface of the inkjet device. If the ink is ejected from the nozzle plate 404 for a long time, ink droplets 402 will appear on the surface of the nozzle plate 404 ( Figure 4 (b)).

[0078] Cleaning of the nozzle plate 404 is started at a certain timing. First, the cleaning device 403 of the inkjet head is moved to just below the end A of the nozzle plate. Thereafter, the cleaning device 403 rises, and the nozz...

Embodiment approach 2

[0146] Air bubbles in the head body 1 are not removed at the initial stage of ink filling, or deposits and the like are generated on the surface of the nozzle plate 9 during repeated printing on the target object.

[0147] In addition, when printing is not performed for a long period of time, nozzles that cannot discharge, or nozzles that are bent in the discharge direction and the printing position is shifted may occur. Cleaning is performed to restore the ejection of these defective nozzles.

[0148] Use the diagram below to explain the cleaning process in detail. In order to restore defective nozzles, first remove air bubbles, dried ink, ink deposits, etc. accumulated on the surface of the nozzles and inside the nozzles, so that the flow of ink can be smoothed.

[0149]

[0150] First, if Figure 8 As shown in (a), ink is discharged from the inside of the nozzle 19 by purging. Figure 8 (a) only the surface of the nozzle 19 is shown with respect to the inkjet head 11, ...

Embodiment approach 3

[0166] Figure 10 It is a perspective view which shows the cleaning device in Embodiment 3 of this invention. Matters not described are the same as those in Embodiments 1 and 2. Unlike Embodiments 1 and 2, a plurality of air supply holes 75 are provided on the upper surface of the support portion 73 of the cleaning device 61 . The air supply hole 75 can efficiently introduce compressed air, and may be a through hole.

[0167] When the nozzle surface of the inkjet head 11 is brought close to the cleaning device 61 and suction is performed from the suction port 72 , air flows upward from below the air supply hole 75 . Due to this air flow (static pressure), a gap is generated between the surface of the nozzle 19 and the upper surface of the support portion 73 . The cleaning device 61 moves along the nozzle surface of the inkjet head 11 while maintaining this gap, and performs cleaning.

[0168] Here, the width of the support portion 73 is 1 mm, and the height of the support ...

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PUM

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Abstract

The present invention provides an inkjet head cleaning device, a cleaning method, and a printing device that can reliably remove ink on a nozzle plate surface and eject ink stably. In order to solve the above-mentioned problems, an inkjet head cleaning device used in the present invention includes: a suction part having a suction port for sucking ink; and a support part that is in contact with the nozzle plate of the inkjet head, and the nozzle plate is in contact with the ink. The relationship between the angle α, the contact angle β of the support portion with respect to the ink, and the contact angle γ of the suction portion with respect to the ink is contact angle α>contact angle β>contact angle γ.

Description

technical field [0001] The present invention relates to an inkjet head cleaning device, a cleaning method, and a printing (printing) device using the inkjet head. Background technique [0002] The nozzle plate of the inkjet head has nozzle holes through which ink is ejected. In such an inkjet head, the surface of the nozzle plate is often ink-repellent so that excess ink does not remain around the nozzle holes when ink is ejected from the nozzle holes. exist figure 1 (a) and figure 1 (b) shows the structure of the inkjet head. [0003] The inkjet head has a plurality of nozzles 100 that eject liquid droplets, a pressure chamber 110 communicating with the nozzles, a partition 111 that separates pressure chambers corresponding to different nozzles, a diaphragm 112 that constitutes a part of the pressure chamber, and a diaphragm that vibrates. The piezoelectric element 130, the piezoelectric member 140 supporting the separator, and the common electrode (not shown) for apply...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/165
CPCB41J2/16532B41J2/16523B41J2/01
Inventor 中谷修平吉田英博室真弘熊泽谦太郎
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD