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Liquid circulation system

A circulation system and liquid technology, applied in printing and other directions, can solve problems such as pipe blockage, ink retention, failure to meet expectations, etc., achieve the effect of reducing the number of parts, removing air bubbles, and preventing precipitation

Inactive Publication Date: 2012-08-08
MIMAKI ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] If the above-mentioned ink is always placed in an environment where the flow is still, fine particles with a large specific gravity will settle below the liquid, which may cause clogging of the piping and poor ejection.
[0004] In addition, there is the following problem: From the perspective of the processing of the piping and the functional level of the inkjet printer, the cross-sectional area and volume of the piping are changed by installing a joint and a balancer for the water level gauge. However, if the amount of ink used in the above-mentioned parts If it is less, ink retention will occur, and the above-mentioned parts will become the precipitation parts of fine particles, and the printed matter will not achieve the expected result due to the malfunction of the printer.
[0011] However, in the conventional liquid circulation system, since the pressure sensor for measuring the pressure of the ink flow path and the complicated pressure adjustment device are often used, there is a problem that the price is high.

Method used

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Experimental program
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no. 1 approach

[0041] figure 1 is a schematic configuration diagram of the ink circulation system of the first embodiment, figure 2 is a schematic sectional view of the inkjet head. Such as figure 1 As shown, the ink circulation system 1 of the first embodiment includes an inkjet head 2, an ink cartridge 3, a supply flow path 4, a return flow path 5, a tube pump 6, a tube pump 7, a bellows unit 8 for pressurization, and a bellows unit 8 for decompression. Bellows unit 9 , pressurization regulator 10 , decompression regulator 11 , high-speed circulation flow path 12 .

[0042] The inkjet head 2 is used to eject ink droplets. Therefore, if figure 2 As shown, a plurality of nozzles 15 and a common ink flow path 16 communicating with all the nozzles are formed in the inkjet head 2 .

[0043] The common ink flow path 16 is a flow path through which ink supplied from the ink cartridge 3 to the inkjet head 2 flows. The common ink flow path 16 communicates with all the nozzles 15 formed in t...

no. 2 approach

[0103] Next, refer to Figure 5 , the ink circulation system of the second embodiment will be described. Figure 5 It is a schematic configuration diagram of the ink circulation system of the second embodiment. Such as Figure 5 As shown, the ink circulation system 2 of the second embodiment includes an inkjet head 2, an ink cartridge 3, a supply flow path 4, a return flow path 5, a pressurization regulator 10, a decompression regulator 11, a high-speed circulation flow path 12 and The pressure differential creates a pump 22 .

[0104] The pressure difference generating pump 22 is constituted by a so-called centrifugal pump for forcibly outputting ink from an input port to an output port, generating a pressure difference between the input port and the output port. In this differential pressure generating pump 22 , the input port for ink supply input is connected to the ink cartridge 3 side, and the output port for ink supply output is connected to the pressurization regulat...

no. 3 approach

[0114] Next, refer to Figure 6 , an ink circulation system according to a third embodiment of the present invention will be described. Figure 6 It is a schematic configuration diagram of the ink circulation system of the third embodiment. Such as Figure 6 As shown, the ink circulation system 31 of the third embodiment includes an inkjet head 2, an ink cartridge 3, a supply flow path 4, a return flow path 5, a tube pump 6, a pressurizing bellows unit 8, a pressurizing regulator 10, a high-speed Circulation channel 12 and passive pressure regulating valve 32 .

[0115] The passive pressure regulating valve 32 is used to moderate the pressure fluctuation of the outlet 16 b in the common ink flow path 16 .

[0116] However, in the third embodiment, since the tube pump 6, the pressurizing bellows unit 8, and the pressure adjusting member of the pressurizing regulator 10 are provided between the inkjet head 2 and the ink cartridge 3 in the supply channel 4, The inlet 16a of t...

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PUM

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Abstract

The present invention provides a liquid circulation system. Liquid is appropriately circulated at a low cost so as to prevent precipitation of fine particles in the liquid and remove air bubbles in a liquid flow channel. The system is provided with an inkjet head (2) wherein a common ink flow channel (16) is formed, an ink cartridge (3), a supply flow channel (4) for supplying ink from the ink cartridge (3) to an inlet (16a) of the common ink flow channel (16), a returning flow channel (5) for returning the ink from an outlet (16b) of the common ink flow channel (16) to the ink cartridge (3), a tube pump (6) for sending out the ink in the supply flow channel (4), a tube pump (7) for sending out the ink in the returning flow channel (5), a pressurizing bellows unit (8) for pressurizing the ink in the supply flow channel (4), a depressurizing bellows unit (9) for depressurizing the ink in the returning flow channel (5), a pressurizing regulator (10) for maintaining the inlet (16a) at the center value +[alpha] of a designated water head value, and a depressurizing regulator (11) for maintaining the outlet (16b) at the center value -[alpha] of the designated water head value.

Description

technical field [0001] The present invention relates to a liquid circulation system mounted on a liquid drop ejection device. Background technique [0002] In general, in a large-scale inkjet printer, ink is supplied to an inkjet head from a detachably attached ink cartridge, and the ink contains liquid components such as metallic ink, pearlescent ink, and white ink. Ink of fine particles (pigments, etc.) with different specific gravity. The fine particles contained in the above-mentioned ink have a larger specific gravity than the liquid component, and the fine particles are composed of metal, ore, etc., for example. [0003] If the above-mentioned ink is always left in an environment where the flow is still, fine particles with a large specific gravity will settle below the liquid, which may cause clogging of piping and poor ejection. [0004] In addition, there is the following problem: From the perspective of the processing of the piping and the functional level of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/175
CPCB41J2/175B41J2/18B41J2/17513B41J2/19B41J2/17596
Inventor 横山诚一井川知巳
Owner MIMAKI ENG