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Liquid ejection device and liquid ejection head cleaning method

A technology of liquid ejection head and ejection device, which is applied in printing and other directions, and can solve the problem that it is difficult to achieve the removal efficiency of adhesive ink

Active Publication Date: 2020-11-06
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the method of adjusting the pressing force described in Patent Document 1 to suppress damage caused by contact between the wiping member and the nozzle surface, it is difficult to improve the removal efficiency of the adhering ink.

Method used

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  • Liquid ejection device and liquid ejection head cleaning method
  • Liquid ejection device and liquid ejection head cleaning method
  • Liquid ejection device and liquid ejection head cleaning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] 0.1 mL of ink (RICOH ProAR white ink manufactured by Ricoh Co., Ltd.) was dropped onto the nozzle surface of a liquid ejection head (manufactured by Ricoh Co., Ltd., MH5440), and left to dry for 15 hours at a temperature of 32°C and a humidity of 30%. , to form a sticky ink as the wiping object.

[0116] As the wiping member, a laminate of nonwoven fabrics having a wiping layer and a liquid absorbing layer is used.

[0117] Wiping layer (A1): nonwoven fabric of polyolefin fibers, thickness of fibers: 3d liquid absorbing layer (B1) nonwoven fabric of rayon fibers, thickness of fibers: 3d The composition of the laminate is shown in Table 1.

[0118] The cleaning liquid is impregnated in an amount of 90% or more with respect to the volume of the adhering ink in the wiping member.

[0119] The composition of the cleaning solution is as follows.

[0120] [Composition of cleaning solution]

[0121] ・3-methoxy-3-methyl-1-butanol (manufactured by Kuraray Co., Ltd.) 20% by ma...

Embodiment 2～8

[0139] With regard to the wiping member, except that the contact ratio of the condition [1] and the void amount of the condition [2] were the values ​​shown in Table 1, the removal of the adhering ink was performed in the same manner as in Example 1, and the removal efficiency was evaluated.

[0140] The results are shown in Table 1.

Embodiment 9

[0142] Adhesion was carried out in the same manner as in Example 1, except that the liquid-absorbing layer constituting the wiping member was a polyolefin-based porous body, and the contact ratio under condition [1] and the void volume under condition [2] were the values ​​shown in Table 1. Ink removal, and evaluation of removal efficiency.

[0143] The results are shown in Table 1.

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Abstract

The present invention provides a liquid ejecting device capable of effectively removing ink adhering to a nozzle surface. A liquid ejection device, characterized in that it comprises: a liquid ejection head, which ejects liquid from a nozzle; a strip-shaped wiping member (320) capable of absorbing liquid, which is used to wipe the nozzle surface (41) of the liquid ejection head; A member conveying mechanism (34(410,420)), which conveys the wiping member (320) in the longitudinal direction; a pushing mechanism (33(400)), which pushes the wiping member (320) to the nozzle surface (41) when wiping ), and the control mechanism (32), which controls the wiping member delivery mechanism (34) and the pushing mechanism (33), the wiping member (320) satisfies the following [1] and [2] conditions under the pressing conditions when wiping , [1] The contact rate with the nozzle surface is 60 to 95% [2] When the porosity of the wiping member is V (%) and the thickness of the wiping member is T (mm), the unit expressed in V×T / 100 The value of the void volume of the area is 0.1~0.7(mm 3 / mm 2 ).

Description

technical field [0001] The present invention relates to a cleaning method of a liquid ejecting device and a liquid ejecting head. Background technique [0002] As image forming apparatuses such as printers, facsimile machines, copiers, plotters, and their multifunction peripherals, for example, known liquid ejection apparatuses (inkjet recording apparatuses) have a liquid ejection head or a liquid ejection head unit, and drive The liquid ejection head is used to eject the liquid. [0003] In the inkjet recording apparatus, since problems such as ejection failure due to foreign matter on the nozzle surface of the liquid ejection head occur, periodic cleaning is required. [0004] Examples of the foreign matter on the nozzle surface include sticky ink formed by drying the adhering ink. In particular, there is a problem that the ink with improved fixability tends to adhere to the nozzle surface. [0005] For such adhesive ink, known devices have a mechanism in which a strip-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/165
CPCB41J2/16535B41J2/165B41J2/16502B41J2/16544B41J2002/1655B41J2002/16558B41J2/16552
Inventor 安宅拓未
Owner RICOH KK