CN113276565A - Ink supply system for ink jet printing head - Google Patents

Ink supply system for ink jet printing head Download PDF

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Publication number
CN113276565A
CN113276565A CN202110617498.6A CN202110617498A CN113276565A CN 113276565 A CN113276565 A CN 113276565A CN 202110617498 A CN202110617498 A CN 202110617498A CN 113276565 A CN113276565 A CN 113276565A
Authority
CN
China
Prior art keywords
ink
ink supply
tank
supply system
outlet tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110617498.6A
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Chinese (zh)
Inventor
古奇佳
杨超
陶铭宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Riefa Digital Technology Co ltd
Original Assignee
Shanghai Riefa Digital Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Riefa Digital Technology Co ltd filed Critical Shanghai Riefa Digital Technology Co ltd
Priority to CN202110617498.6A priority Critical patent/CN113276565A/en
Publication of CN113276565A publication Critical patent/CN113276565A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17596—Ink pumps, ink valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism

Abstract

The application provides an ink supply system for an ink jet printing head, comprising: an ink cartridge providing an ink source; at least one ink supply module, the ink supply module comprising: the ink supply tank is connected with the ink outlet tank through the ink jet printing head, and the ink outlet tank is connected with the ink supply tank through the circulating pump; the negative pressure device is connected with the ink supply tank and the ink outlet tank, and the height of the ink supply tank in the gravity direction is greater than that of the ink outlet tank; the number of the ink pumps is equal to that of the ink supply modules, and the ink pumps are connected with the ink cartridges and the ink supply tanks; and the control device is used for controlling the ink pump, the ink supply module and the negative pressure device to work. The ink supply system that this application provided can realize the circulation in supplying ink the module and supply ink, reduces the deposit of ink and blocks up, does benefit to the extension, conveniently supplies ink for the circulation of a plurality of inkjet printer heads to can be applicable to the printing of multiple situation according to the speed that the printing parameter adjustment was printed.

Description

Ink supply system for ink jet printing head
Technical Field
The invention relates to the technical field of ink-jet printing, in particular to an ink supply system of an ink-jet printing head.
Background
In recent years, with the rapid development of digital ink jet printing technology, the printing head technology is also greatly improved, a large number of industrial digital ink jet printing heads are developed, the traditional printing heads mostly adopt open type positive pressure ink supply, the siphon method or the differential pressure method is mostly adopted to realize ink pressure, the utilization rate of the printing heads adopting negative pressure ink supply is low, and the printing heads adopting negative pressure ink supply mostly adopt the negative pressure air bag method of a vacuum proportional valve to realize ink pressure. These ink supply methods can be used in small inkjet printers, but cannot be used in large industrial grade high-speed digital inkjet printers. The printing ink used by the large-scale industrial grade high-speed digital ink-jet printing head machine has large specific gravity and poor anti-settling property. Therefore, in the process of spray painting, the ink needs to pass through a circulating ink path system for preventing precipitation, and the design of the ink path system directly determines whether the ink is discharged from the printing head normally or not. The ink path circulating system of the existing ink-jet printer has large ink impact and ink supply is intermittent and frequent operation, which easily causes the instability of the pressure of an inlet and an outlet of an ink-jet head, thereby causing the phenomena of ink drawing, ink dripping and the like.
To solve the above problems, CN109515005A proposes a solution, in which ink is continuously flowed by the cyclic ink supply between the main ink cartridge and the sub ink cartridge, so as to reduce the phenomenon of deposition and blockage, but this solution is basically only applicable to the situation of performing a printing solution for a long time, and it is troublesome to change the ink supply speed according to the printing parameters (such as printing speed, resolution, etc.); on the other hand, one set of ink supply system can only be applied to one print head, and when one ink jet printer has a plurality of print heads, a plurality of sets of ink supply systems are needed, so that the design of the whole ink jet printer becomes more complicated and the cost is increased.
Disclosure of Invention
The application provides an ink supply system for an ink jet printing head, comprising:
an ink cartridge providing an ink source;
at least one ink supply module, the ink supply module comprising: the ink supply tank is connected with the ink outlet tank through the ink jet printing head, and the ink outlet tank is connected with the ink supply tank through the circulating pump;
the negative pressure device is connected with the ink supply tank and the ink outlet tank, and the height of the ink supply tank in the gravity direction is greater than that of the ink outlet tank;
the number of the ink pumps is equal to that of the ink supply modules, and the ink pumps are connected with the ink cartridges and the ink supply tanks;
and the control device is used for controlling the ink pump, the ink supply module and the negative pressure device to work.
In one embodiment, the height difference h of the ink supply tank and the ink outlet tank in the gravity direction is 2.54f/100rk, wherein f is the firing frequency of the ink jet print head, r is the printing resolution, and k is the viscosity coefficient of the ink.
In one embodiment, the ink supply device further comprises a first motion module for controlling the ink supply tank to reciprocate along the gravity direction and a second motion module for controlling the ink outlet tank to reciprocate along the gravity direction.
In one embodiment, the first motion module comprises a first motor, a first screw rod and a first tray, wherein the first motor is connected with one end of the first screw rod, and the first tray is fixed with the other end of the first screw rod.
In one embodiment, the second motion module comprises a second motor, a second screw rod and a second tray, the second motor is connected with one end of the second screw rod, and the second tray is fixed with the other end of the second screw rod.
In one embodiment, the circulation pump pumps the ink of the ink outlet tank into the ink supply tank.
In one embodiment, the ink supply module comprises a first liquid level detector and a second liquid level detector which are connected with the control device, the first liquid level detector is connected with the ink supply tank, and the second liquid level detector is connected with the ink outlet tank.
In one embodiment, the control device comprises a logic control unit, an information input unit and an instruction output unit, wherein the logic control unit sends an instruction to the instruction output unit according to the information of the information input unit.
In one embodiment, the ink supply tank and the ink discharge tank are gravitationally higher than the inkjet printhead.
In one embodiment, the ink cartridge is gravitationally higher than the ink supply tank
The ink supply system that this application provided can realize the circulation in supplying ink the module and supply ink, reduces the deposit of ink and blocks up, does benefit to the extension, conveniently supplies ink for the circulation of a plurality of inkjet printer heads to can be applicable to the printing of multiple situation according to the speed that the printing parameter adjustment was printed.
Drawings
FIG. 1 is a schematic diagram of an ink supply system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a motion module according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an ink supply system according to an embodiment of the present disclosure.
Detailed Description
In the description of this patent, it is noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The meaning of the above terms in this patent may be specifically understood by those of ordinary skill in the art.
Example one
An ink supply system proposed by the present application is shown in fig. 1, and includes: an ink cartridge 10, the ink cartridge 10 providing a supply of ink; an ink pump 20 connected to the ink cartridge 10, the ink pump 20 drawing ink from the ink cartridge 10; the ink supply module 30 is positioned between the inkjet printing head 60 and the ink pump 20, and comprises an ink supply tank 31, an ink outlet tank 32 and a circulating pump 33, wherein the ink supply tank 31 is connected with the ink outlet tank 32 through the inkjet printing head 60, and the ink outlet tank 32 is connected with the ink supply tank 31 through the circulating pump 33; the negative pressure device 40 is connected with the ink supply tank 31 and the ink outlet tank 32; and the control device 60 is connected with the negative pressure device 40, the ink supply module 30 and the ink pump 20 through the control device 60.
Specifically, the arrows in fig. 1 indicate the direction of ink flow, which may be accomplished by a conduit. The ink pump 20 pumps the ink from the ink box 10 into an ink supply tank 31, the ink supply tank 31 is positioned above the ink-jet printing head 60, and the ink flows into the ink-jet printing head 60 under the action of gravity; the inkjet printhead 60 ejects a portion of the ink onto the print medium 70 to form a print pattern, and another portion of the ink is ejected into the ink outlet tank 32; the ink outlet tank 32 is also disposed above the inkjet print head 60. The height of the ink outlet tank 32 in the gravity direction is smaller than that of the ink supply tank 31, and the height difference is h. The ink supply tank 31 and the ink discharge tank 32 are connected to the same negative pressure device, and since the ink discharge tank 32 is lower than the ink supply tank 31, ink that has not been ejected can enter the ink discharge tank.
The circulation pump 33 pumps the ink of the ink outlet tank 32 into the ink supply tank 31, thereby achieving circulation of the ink. In this embodiment, the circulation pump 33 is not always operated, and the control device 60 commands the circulation pump 33 to be turned on when the liquid level in the ink supply tank 31 is lower than the ink outlet tank 32, and the circulation pump 33 is turned off when the liquid level in the ink supply tank 31 is lower than the ink outlet tank 32. In order to realize the above functions, a first liquid level detector is arranged in the ink supply tank 31, a second liquid level detector is arranged in the ink outlet tank 32, and the first liquid level detector and the second liquid level detector feed back liquid level information to the control device 60.
The control device 60 may be a single chip, a microcomputer, or the like, and includes a logic control unit, an information input unit, and an instruction output unit, and the logic control unit sends an instruction to the instruction output unit according to information of the information input unit. The information unit receives liquid level information of the first liquid level detector and the second liquid level detector, and the logic control unit sends an instruction to the instruction output unit according to the liquid level information to control the opening and closing of the circulating pump. Moreover, the ink pump 20, the negative pressure device 40 can be turned on and off, and the operating parameters can be set by the control device.
The height difference h between the ink supply tank 31 and the ink outlet tank 32 depends on the printing parameters, and h is 2.54f/100rk, where f is the firing frequency of the inkjet printhead, i.e., the ejection frequency of ink droplets, r is the printing resolution, i.e., the resolution of an image printed on a printing medium, and r is the viscosity coefficient of the ink.
In order to adjust the heights of the ink supply tank 31 and the ink discharge tank 32, the ink supply system further includes a first moving module and a second moving module, as shown in fig. 2, the first moving module includes a first motor 31, a first lead screw 93 and a first tray 95, the first motor 91 is connected to one end of the first lead screw 93, and the first tray 95 is fixed to the other end of the first lead screw 93. The second motion module comprises a second motor 92, a second lead screw 94 and a second tray 96, the second motor 92 is connected with one end of the second lead screw 94, and the second tray 96 is fixed with the other end of the second lead screw 94. The ink supply tank 31 is located on the first tray 95, and the first motor 91 is connected to the control device 50 and rotates forward or backward according to an instruction of the control device 50, so as to drive the first screw rod 93 to move up and down, thereby adjusting the height of the ink supply tank 31. The ink outlet tank 32 is located on the second tray 96, and the second motor 92 is connected to the control device 50 and rotates forward or backward according to an instruction of the control device 50, so as to drive the second lead screw 94 to move up and down, thereby adjusting the height of the ink supply tank 32.
One advantage of the present application is that it is easily scalable, with the first embodiment showing the case of one ink jet print head and the second embodiment being specifically described in connection with three ink jet print heads.
Example two
Referring to fig. 3, an ink supply system is shown that includes:
an ink cartridge 10, the ink cartridge 10 providing a supply of ink;
three ink pumps connected to the ink cartridge 10, a first ink pump 21, a second ink pump 22, and a third ink pump 23, respectively, which draw ink from the ink cartridge 10, respectively;
the ink supply system comprises three ink supply modules, namely a first ink supply module 310, a second ink supply module 320 and a third ink supply module 330, wherein the first ink supply module 310 is positioned between the first ink jet printing head 61 and the first ink pump 21 and comprises a first ink supply tank 311, a first ink outlet tank 312 and a first circulating pump 313, the first ink supply tank 311 is connected with the first ink outlet tank 312 through the first ink jet printing head 61, and the first ink outlet tank 312 is connected with the first ink supply tank 311 through the first circulating pump 313; the second ink supply module 320 is located between the second inkjet printing head 62 and the second ink pump 22, and includes a second ink supply tank 321, a second ink outlet tank 322, and a second circulation pump 323, where the second ink supply tank 321 is connected to the second ink outlet tank 322 through the second inkjet printing head 62, and the second ink outlet tank 322 is connected to the second ink supply tank 321 through the second circulation pump 323; the third ink supply module 330 is located between the third inkjet printing head 63 and the third ink pump 23, and includes a third ink supply tank 331, a third ink outlet tank 332 and a third circulation pump 333, the third ink supply tank 331 is connected to the third ink outlet tank 332 via the third inkjet printing head 63, and the third ink outlet tank 332 is connected to the third ink supply tank 331 via the third circulation pump 333
A negative pressure device 40, wherein the first ink supply tank 311, the second ink supply tank 321, the third ink supply tank 331, the first ink outlet tank 312, the second ink outlet tank 322 and the third ink outlet tank 332 are connected with the negative pressure device 40
The structure of the first motion module, the second motion module, the third motion module, the fourth motion module, the fifth motion module and the sixth motion module may be the same as that of the first embodiment. The first motion module is used for adjusting the height of the first ink supply tank 311, and the second motion module is used for adjusting the height of the first ink outlet tank 312; the third motion module is used for adjusting the height of the second ink supply tank 321, and the fourth motion module is used for adjusting the height of the second ink outlet tank 322; the fifth motion module is used to adjust the height of the third ink supply tank 331, and the sixth motion module is used to adjust the height of the third ink outlet tank 332. The height difference between the first ink supply tank 311 and the first ink outlet tank 312 is h1, the height difference between the second ink supply tank 321 and the second ink outlet tank 322 is h2, and the height difference 332 between the third ink supply tank 331 and the third ink outlet tank is h 3. In one embodiment, the printing speeds of the first, second, and third inkjet print heads 61, 62, and 63 may be made equal to each other when h 1-h 2-h 3. By controlling the values of h1, h2, and h3, independent control of the print speed of each inkjet printhead is achieved.
And the control device controls the negative pressure device 40, the first ink supply module 310, the second ink supply module 320, the third ink supply module 330, the first ink pump 21, the second ink pump 22, the third ink pump 23, the first motion module, the second motion module, the third motion module, the fourth motion module, the fifth motion module and the sixth motion module to work. For clarity of illustration, the control device and the motion module and their connections are not shown in fig. 3, it being understood that this does not hinder the understanding of the solution of the present application by the skilled person.
Specifically, the first ink pump 21 pumps the ink from the ink cartridge 10 into the first ink supply tank 311, the first ink supply tank 311 is located above the first inkjet printing head 61, and the ink flows into the first inkjet printing head 61 under the action of gravity; the first ink jet print head 61 ejects a part of ink onto the printing medium 70 to form a printing pattern, and the other part of ink is not ejected and enters the first ink outlet tank 312; the first circulation pump 313 pumps the ink in the first ink outlet tank 312 into the first ink supply tank 312, so as to circulate the ink in the first ink supply module 310.
The second ink pump 22 pumps the ink from the ink cartridge 10 into a second ink supply tank 321, the second ink supply tank 321 is located above the second inkjet printing head 62, and the ink flows into the second inkjet printing head 62 under the action of gravity; the second ink jet print head 62 ejects a part of the ink onto the printing medium 70 to form a printing pattern, and the other part of the ink is not ejected and enters the second ink outlet tank 322; the second circulation pump 323 pumps the ink in the second ink outlet tank 322 into the second ink supply tank 321, so as to circulate the ink in the second ink supply module 320.
The third ink pump 23 pumps the ink from the ink cartridge 10 into a third ink supply tank 331, the third ink supply tank 331 is located above the third ink jet printing head 63, and the ink flows into the third ink jet printing head 63 under the action of gravity; the third inkjet printhead 63 ejects a portion of the ink onto the printing medium 70 to form a printing pattern, and another portion of the ink is ejected and enters the third ink outlet tank 332; the third circulation pump 333 pumps the ink in the third ink outlet tank 332 into the third ink supply tank 331, thereby realizing circulation of the ink in the third ink supply module.
In this embodiment, three ink supply modules are respectively connected to three ink jet print heads, and a negative pressure device, an ink source and a control device are commonly used, so that ink circulation is independently realized in the three ink supply modules.
Other features of the second embodiment may be the same as those of the first embodiment, and will not be described in detail herein.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. An ink supply system for an ink jet printhead, comprising:
an ink cartridge providing an ink source;
at least one ink supply module, the ink supply module comprising: the ink supply tank is connected with the ink outlet tank through the ink jet printing head, and the ink outlet tank is connected with the ink supply tank through the circulating pump;
the negative pressure device is connected with the ink supply tank and the ink outlet tank, and the height of the ink supply tank in the gravity direction is greater than that of the ink outlet tank;
the number of the ink pumps is equal to that of the ink supply modules, and the ink pumps are connected with the ink cartridges and the ink supply tanks;
and the control device is used for controlling the ink pump, the ink supply module and the negative pressure device to work.
2. The ink supply system according to claim 1, wherein the height difference h between the ink supply tank and the ink outlet tank in the gravity direction is 2.54f/100rk, where f is the firing frequency of the ink jet print head, r is the printing resolution, and k is the viscosity coefficient of the ink.
3. The ink supply system according to claim 1, further comprising a first motion module that controls the ink supply tank to reciprocate in a direction of gravity and a second motion module that controls the ink discharge tank to reciprocate in the direction of gravity.
4. The ink supply system of an inkjet printhead according to claim 3, wherein the first motion module includes a first motor, a first lead screw, and a first tray, the first motor is connected to one end of the first lead screw, and the first tray is fixed to the other end of the first lead screw.
5. The ink supply system of the ink jet print head according to claim 3, wherein the second motion module comprises a second motor, a second screw rod and a second tray, the second motor is connected with one end of the second screw rod, and the second tray is fixed with the other end of the second screw rod.
6. The inkjet printhead ink supply system of claim 1, wherein the circulation pump draws ink from the ink outlet tank into the ink supply tank.
7. The ink supply system of claim 1, wherein the ink supply module comprises a first liquid level detector and a second liquid level detector connected to the control device, the first liquid level detector is connected to the ink supply tank, and the second liquid level detector is connected to the ink outlet tank.
8. The ink supply system for an ink jet print head according to claim 1, wherein said control means comprises a logic control unit, an information input unit, and an instruction output unit, said logic control unit issuing an instruction to the instruction output unit based on information from the information input unit.
9. The ink supply system according to claim 1, wherein the ink supply tank and the ink discharge tank are gravitationally higher than the ink jet print head.
10. The inkjet printhead ink supply system of claim 1 wherein said ink cartridge is gravitationally higher than said ink supply tank.
CN202110617498.6A 2021-06-04 2021-06-04 Ink supply system for ink jet printing head Pending CN113276565A (en)

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Application Number Priority Date Filing Date Title
CN202110617498.6A CN113276565A (en) 2021-06-04 2021-06-04 Ink supply system for ink jet printing head

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Application Number Priority Date Filing Date Title
CN202110617498.6A CN113276565A (en) 2021-06-04 2021-06-04 Ink supply system for ink jet printing head

Publications (1)

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CN113276565A true CN113276565A (en) 2021-08-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113910777A (en) * 2021-09-24 2022-01-11 新印科技股份有限公司 Ink supply system of ink-jet printer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113910777A (en) * 2021-09-24 2022-01-11 新印科技股份有限公司 Ink supply system of ink-jet printer

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