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

A technology of a liquid ejection head and an ejection method, which is applied to the inking device, printing and other directions, and can solve the problems of unstable liquid ejection 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, a problem that the ejection of the liquid becomes unstable will occur.

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
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Effect test

no. 1 approach

[0151]

[0152] First, the injection pulse PS1 used for evaluation will be described. Figure 6 It is a figure explaining this injection pulse PS1. exist Figure 6 In the graph, the vertical axis represents the potential of the drive signal COM (ejection pulse PS1 ), and the horizontal axis represents time.

[0153] Figure 6 The illustrated injection pulse PS1 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.

[0154] 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 highe...

no. 2 approach

[0239] As described above, in the head HD of the second embodiment, the cross-sectional area S425 of the ink supply passage 425 is set within a range of 1 / 3 or more of the cross-sectional area S424 of the pressure chamber 424 and less than or equal to 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 evaluation is obtained by Figure 6 The illustrated injection pulse PS1 is therefore omitted.

[0240]

[0241] Figure 60 It is a figure explaining the structural parameter of each head HD used as 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...

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Abstract

Provided is a liquid ejecting method, comprising 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 cross-sectional area of the supply unit is in a range from 1 / 3 of the cross-sectional area of the pressure chamber to the cross-sectional area 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 liquid ejection devices such as inkjet printers, there is a liquid ejection device having a liquid ejection head having nozzles for ejecting liquid, a pressure chamber for applying a pressure change to the liquid in order to eject the liquid from the nozzles, and a The liquid stored in the reservoir is supplied to the supply in the pressure chamber. In this liquid ejection head, the size of the liquid channel in the ejection head is determined for a liquid having a viscosity close to that of water. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2005-34998. Contents of the invention [0004] In recent years, attempts have been made to eject liquids with higher viscosity than general inks using inkjet technology. Also, it has been recognized that if such a highly viscous liqui...

Claims

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Application Information

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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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