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Liquid ejecting method, liquid ejecting head, and liquid ejecting apparatus

The technology of a liquid ejection head and ejection method, which is applied in the direction of inking device and printing, can solve the problems of ejection instability and the like

Active Publication Date: 2009-09-09
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And it has been recognized that if such a high-viscosity liquid is ejected with a conventionally shaped ejection head, there will be a problem that the ejection of the liquid will become unstable

Method used

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  • Liquid ejecting method, liquid ejecting head, and liquid ejecting apparatus
  • Liquid ejecting method, liquid ejecting head, and liquid ejecting apparatus
  • Liquid ejecting method, liquid ejecting head, and liquid ejecting apparatus

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0155]

[0156] First, the injection pulse PS1 used for evaluation will be described. Image 6 is a diagram for explaining the injection pulse PS1. exist Image 6 In the graph, the vertical axis represents the potential of the drive signal COM (ejection pulse PS1 ), and the horizontal axis represents time.

[0157] Image 6 The injection pulse PS1 shown has a plurality of parts denoted by symbols P1 to P5 . That is, the injection pulse PS1 has a first decompression portion P1, a first potential maintaining portion P2, a pressurizing portion P3, a second potential maintaining portion P4, and a second decompression portion P5.

[0158] The first decompression portion P1 is a portion generated throughout the period from timing t1 to timing t2. The potential of the first decompression portion P1 at timing t1 (corresponding to the starting potential) is the intermediate potential VB, and the potential at timing t2 (corresponding to the terminal potential) is the highest poten...

no. 2 approach

[0242] As described above, in the second embodiment, the cross-sectional area S425 of the ink supply passage 425 is set within a range of not less than 1 / 3 of the cross-sectional area S424 of the pressure chamber 424 and not more than the cross-sectional area S424. In addition, the flow path length L424 of the pressure chamber 424 is set to be equal to or greater than the length L425 of the ink supply path 425 and equal to or less than twice the length L425. Next, the evaluation results of the head HD of the second embodiment will be described. In addition, the injection pulse PS used for the evaluation is composed of Image 6 Illustrated injection pulse PS1. Therefore, description is omitted.

[0243]

[0244] Figure 60 It is a figure for explaining the structural parameter of each head HD of evaluation object. exist Figure 60 , the vertical axis represents the cross-sectional area S425 of the ink supply passage 425 , and the horizontal axis represents the length L42...

Embodiment approach

[0285] The above-mentioned embodiments mainly describe a printing system including the printer 1 as a liquid ejecting device, but also disclose a liquid ejecting method, a liquid ejecting system, a method of setting ejection pulses, and the like. In addition, this embodiment is only for easy understanding of this invention, and it is not for interpreting this invention restrictively. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that equivalent inventions thereof are also included in the present invention. In particular, the above-mentioned embodiments are also included in the present invention.

[0286]

[0287] In the head HD of the above embodiment, the piezoelectric element 433 is of a type that operates to increase the volume of the pressure chamber 424 as the potential of the applied ejection pulse PS (PS1, PS2, etc.) increases. Other types of piezoelectric elements may also be used. exist ...

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PUM

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Abstract

Provided is a liquid ejecting method, including ejecting a liquid from a liquid ejecting head, wherein: the viscosity of the liquid is in a range from 6 mPas to 15 mPas, the liquid ejecting head includes: nozzles which eject the liquid; a pressure chamber which applies a pressure variation to the liquid in order to eject the liquid from the nozzles; and a supply unit which communicates with the pressure chamber and supplies the liquid to the pressure chamber, the volume of the supply unit is more than 1 / 5 of the volume of the pressure chamber and is less than 1 / 2 of the volume of the pressure chamber, and the channel length of the pressure chamber is equal to or more than the channel length of the supply unit and is equal to or less than twice of the channel length of the supply unit.

Description

technical field [0001] The present invention relates to a liquid ejection method, a liquid ejection head, and a liquid ejection device. Background technique [0002] Regarding a liquid ejecting device such as an inkjet printer, there is a liquid ejecting device having a liquid ejecting head having a nozzle for ejecting a liquid, a pressure chamber for changing the pressure of the liquid for ejecting the liquid from the nozzle, and a liquid ejecting head for ejecting the liquid from the nozzle. A supply part for supplying the liquid stored in the reservoir to the pressure chamber. In this liquid ejection head, the size of the liquid channel in the ejection head is determined for a liquid whose viscosity is close to that of water. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2005-34998. Contents of the invention [0004] Recently, attempts are being made to eject liquids having a higher viscosity than general inks using inkjet technology. And it h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/01B41J2/14B41J2/175
CPCB41J2202/11B41J2/04588B41J2/04581B41J2/14274
Inventor 铃木善之
Owner SEIKO EPSON CORP
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