CN112706524B - Pressure stabilizing circulation ink supply method and device and printing equipment - Google Patents
Pressure stabilizing circulation ink supply method and device and printing equipment Download PDFInfo
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- CN112706524B CN112706524B CN202011637596.8A CN202011637596A CN112706524B CN 112706524 B CN112706524 B CN 112706524B CN 202011637596 A CN202011637596 A CN 202011637596A CN 112706524 B CN112706524 B CN 112706524B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 230000000087 stabilizing effect Effects 0.000 title claims abstract description 21
- 238000007639 printing Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 102
- 239000007921 spray Substances 0.000 claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 230000001276 controlling effect Effects 0.000 claims description 22
- 239000002699 waste material Substances 0.000 claims description 19
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 125000004122 cyclic group Chemical group 0.000 claims 2
- 230000008859 change Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- 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
- B41J2/17556—Means for regulating the pressure in the cartridge
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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
- B41J2/17563—Ink filters
-
- 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
- B41J2/17566—Ink level or ink residue control
-
- 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
- B41J2/18—Ink recirculation systems
- B41J2/185—Ink-collectors; Ink-catchers
-
- 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
- B41J2/18—Ink recirculation systems
- B41J2/185—Ink-collectors; Ink-catchers
- B41J2002/1856—Ink-collectors; Ink-catchers waste ink containers
Landscapes
- Ink Jet (AREA)
Abstract
The utility model belongs to the technical field of printing, solves the technical problem of large fluctuation of pressure values in an existing ink supply box or a circulating ink box, and provides a pressure stabilizing circulating ink supply method. The method is applied to a circulating ink supply system, and the circulating ink supply system is used for supplying ink to a spray head and comprises the following steps: an ink supply box and a circulating ink box which are sequentially communicated through ink pipes; the steady pressure circulation ink supply method comprises the following steps: detecting the current pressure of the ink supply box and/or the circulating ink box in real time; judging whether the pressure fluctuation value of the current pressure of the ink supply box and/or the circulating ink box is in a preset range or not according to the pressure detected by the pressure detection mechanism; if the judgment result is negative, adjusting the relative height between the liquid level of the ink supply box and/or the circulating ink box and the spray head so that the pressure fluctuation value of the ink supply box and/or the circulating ink box is in a preset range; if the judgment result is yes, stopping adjusting the relative height of the liquid level of the ink supply box and the spray head, and controlling the circulation of the ink path.
Description
Technical Field
The present utility model relates to the field of printing technologies, and in particular, to a pressure stabilizing circulation ink supply method, a pressure stabilizing circulation ink supply device, and a printing apparatus.
Background
The piezoelectric ink jet is to apply a fixed pressure to the ink in the nozzle by using a piezoelectric driving device, and to continuously jet the ink in the form of character or graphic record.
In order to circulate the ink supply from the head, the ink supply tank and the circulation tank are usually connected to both ends of the head. The ink supply box and the circulating box are respectively communicated with a first pressure system and a second pressure system, the pressure of the first pressure system is larger than that of the second pressure system, and the pressure difference between the ink supply box and the circulating box is utilized to press ink from the ink supply box to the spray head and then to the circulating box, so that circulation is formed. The fluctuation value of the pressure between the ink supply box and the circulating ink box influences the whole ink path circulation, thereby influencing the ink jet effect. In the existing circulation, the pressure of the ink supply box and the circulation ink box is controlled only by controlling the pressure of the total pressure source, but the pressure of the ink supply box and the circulation ink box is controlled by controlling the pressure of the total pressure source, so that the pressure in the ink supply box and the circulation ink box is not always kept stable effectively, the pressure fluctuation in the ink supply box or the circulation ink box is larger, and the circulation effect of the circulation ink path is poor. Therefore, the existing circulating ink supply system has the technical problem that the pressure value in the ink supply box or the circulating ink box fluctuates greatly.
Disclosure of Invention
In view of the above, embodiments of the present utility model provide a pressure stabilizing circulation ink supply method, device and printing apparatus, so as to solve the technical problem in the prior art that pressure value in an ink supply box or in a circulation ink box fluctuates greatly in a circulation ink supply system.
The embodiment of the utility model provides a steady-pressure circulating ink supply method, which is applied to a circulating ink supply system, and the circulating ink supply system is used for supplying ink to a spray head and comprises the following steps: an ink supply box and a circulating ink box which are sequentially communicated through ink pipes; the steady pressure circulation ink supply method comprises the following steps: detecting the current pressure of the ink supply box and/or the circulating ink box in real time; judging whether the pressure fluctuation value of the current pressure of the ink supply box and/or the circulating ink box is in a preset range or not according to the pressure detected by the pressure detection mechanism; if the judgment result is negative, adjusting the relative height between the liquid level of the ink supply box and/or the circulating ink box and the spray head so that the pressure fluctuation value of the ink supply box and/or the circulating ink box is in a preset range; if the judgment result is yes, stopping adjusting the relative height of the liquid level of the ink supply box and the spray head, and controlling the circulation of the ink path.
Further, the step of adjusting the relative height of the liquid level of the ink supply cartridge and/or the circulation cartridge and the spray head includes: and acquiring the actual liquid level height of the ink supply box and/or the circulating ink box so as to adjust the relative height of the ink supply box and/or the circulating ink box and the spray head.
Further, the method further comprises: when the ink path circulation is finished, the pressure of the ink supply box and the circulating ink box is switched so as to control ink pressing.
Further, the method further comprises: detecting the value of a related parameter of the ink in the circulating ink box; judging whether the numerical value of the related parameter is in a preset range, and controlling the flow direction of the ink at the output end of the circulating ink according to the judging result.
Further, the circulation system includes an ink waste cartridge, and controlling the flow direction of the ink at the output end of the circulating ink includes: and controlling the ink at the output end of the circulating ink to flow to the circulating ink box or controlling the ink at the output end of the circulating ink to flow to the waste ink box.
A second aspect of the present utility model provides a regulated pressure circulation ink supply apparatus for supplying ink to a head, comprising: an ink supply box and a circulating ink box which are sequentially communicated through ink pipes; the pressure detection mechanism is used for detecting the current pressure of the ink supply box and/or the circulating ink box in real time; the control mechanism is used for judging whether the pressure fluctuation value of the current pressure of the ink supply box and/or the circulating ink box is in a preset range or not according to the pressure detected by the pressure detection mechanism, and correspondingly outputting a control signal; and the height adjusting mechanism is used for adjusting the relative height between the liquid level of the ink supply box and/or the circulating ink box and the spray head according to the control signal so that the pressure fluctuation value of the ink supply box and/or the circulating ink box is within a preset range.
Further, the apparatus further comprises: the liquid level detection mechanism is used for acquiring the actual liquid level height of the ink supply box and/or the circulating ink box and sending a liquid level signal to the height adjustment mechanism; and the height adjusting mechanism adjusts the relative height of the ink supply box and/or the circulating ink box and the spray head according to the liquid level signal.
Further, the device also comprises a first pressure system, a second pressure system, a first switching element and a second switching element; the first pressure system is communicated with the ink supply box or the circulating ink box through the first switch element; the second pressure system is communicated with the ink supply box or the circulating ink box through the second switch element.
Further, the apparatus further includes a waste ink cartridge and a third switching element; the circulating ink cartridge communicates with the ink supply cartridge or the waste ink cartridge through the third switching element.
A third aspect of the utility model provides a printing apparatus comprising a circulating ink supply device as claimed in any one of the preceding claims.
In summary, the beneficial effects of the utility model are as follows:
when the pressure fluctuation is large, the method adjusts the relative height between the liquid level of the ink supply box and/or the circulating ink box and the spray head, ensures that the influence of the liquid level of the ink supply box and/or the circulating ink box on the spray head is minimized, and is convenient for controlling the pressure to be stable, thus realizing the stable pressure circulating ink supply; the technical problem that the pressure value in the ink supply box or the circulating ink box has larger fluctuation in the existing circulating ink supply system is solved; has the advantage of stable pressure ink supply.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings required to be used in the embodiments of the present utility model will be briefly described, and it is within the scope of the present utility model to obtain other drawings according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for supplying ink in a regulated circulation according to an embodiment of the present utility model;
FIG. 2 is a flow chart of a method for stabilizing circulation ink supply according to another embodiment of the present utility model;
FIG. 3 is a flow chart of a method for stabilizing circulation ink supply according to another embodiment of the present utility model;
FIG. 4 is a schematic diagram of a pressure stabilizing circulation ink supply device according to another embodiment of the present utility model;
fig. 5 is a schematic structural diagram of a pressure stabilizing circulation ink supply device according to another embodiment of the present utility model.
Parts and numbers in the figures:
1. a main ink cartridge; 2. a fifth switching element; 3. an ink supply pump; 4. an ink filter; 5. an ink buffer device; 6. an ink supply box; 7. a spray head; 8. circulating the ink box; 9. a circulation pump; 10. a third switching element; 11. a fourth switching element; 12. waste ink cartridges; 13. a pressure detection mechanism; 14. a first liquid level detection mechanism; 15. a height adjusting mechanism; 16. cleaning liquid; 17. a second liquid level detection mechanism; 18. a heating device; 19. a first pressure source; 20. a first flow regulator; 21. a first cushioning element; 22. a first switching element; 23. a second pressure source; 24. a second flow regulator; 25. a second cushioning element; 26. and a second switching element.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element. If not conflicting, the embodiments of the present utility model and the features of the embodiments may be combined with each other, which are all within the protection scope of the present utility model.
In one aspect, the present utility model provides a regulated circulation ink supply method, where the regulated circulation ink supply method is applied to a circulation ink supply system for supplying ink to a nozzle, and the circulation ink supply system includes: an ink supply box 6 and a circulating ink box 8 which are sequentially communicated through ink pipes; as shown in fig. 1, the method comprises the steps of:
s1, detecting the current pressure of the ink supply box 6 and/or the circulating ink box 8 in real time;
s2, judging whether the pressure fluctuation value of the current pressure of the ink supply box 6 and/or the circulating ink box 8 is in a preset range or not according to the pressure detected by the pressure detection mechanism;
s3, if the judgment result is negative, adjusting the relative height between the liquid level of the ink supply box 6 and/or the circulating ink box 8 and the spray head 7 so that the pressure fluctuation value of the ink supply box 6 and/or the circulating ink box 8 is in a preset range;
and S4, if the judgment result is yes, stopping adjusting the relative height between the liquid level of the ink supply box 6 and the spray head 7, and controlling the ink path circulation.
In the present embodiment, in the above step S1, the pressure in the ink supply tank 6 may be monitored in real time alone, or the pressure in the circulation tank 8 may be monitored alone, or the pressures in the ink supply tank 6 and the circulation tank 8 may be monitored simultaneously; in general, the pressure in the monitoring ink supply tank 6 and the circulating ink tank 8 is determined by the pressure system in which the monitoring ink supply tank 6 and the circulating ink tank 8 are connected, but when the pressure in the pressure system in which the ink supply tank 6 and the circulating ink tank 8 are connected is adjusted to supply pressure to the ink supply tank 6 or the circulating ink tank 8, the pressure is lost, so that it is difficult to directly control the pressure system to balance the pressures in the ink supply tank 6 and the circulating ink tank 8; therefore, when detecting the pressure in the ink supply tank 6 or the circulation tank 8, the pressure detecting device is directly installed in the ink supply tank 6 or the circulation tank 8 to perform detection. Since the pressure in the circulating ink supply system is affected by the pressure at both ends, the pressure effect in the ink supply cartridge 6 and the circulating ink cartridge 8 is detected at the same time at the time of detection. Specifically, the pressure detector may be detected by a pressure gauge.
In the step S2, the detected pressure value is compared to determine the fluctuation value, and the basis of the determination is that whether the change of the pressure value in unit time exceeds 10% or not, if yes, the determination result is no, and if not, the determination result is yes.
In general, in the above step S3, the pressures in the ink supply tank 6 and the circulation tank 8 can be directly controlled, so that the pressure balance of the whole ink supply system can be directly controlled, but when the ink supply system is adjusted, there is a wrong zone, so that there is no way to directly adjust the pressures in the ink supply tank 6 and the circulation tank 8 to balance the pressure of the whole system; because the pressure in the circulating ink supply system is influenced by the pressure at two ends and the height of the spray head 7, when the pressure regulation is not enough to achieve the pressure stabilization, the relative heights of the ink supply box 6 and the circulating ink box 8 are controlled and regulated, the pressure is balanced by regulating the heights, the influence of the height on the pressure is ensured to be minimum, the pressure at two ends of the spray head 7 is conveniently regulated, and the pressure in the circulating ink supply system is quickly stabilized.
In the above step S4, the distance between the ink supply cartridge 6 or the circulation and the head 7 is adjusted until the pressure is stabilized, before the pressure is stabilized.
The method further comprises the following steps: s42, if the relative height between the liquid level of the ink supply box 6 and/or the circulating ink box 8 and the nozzle 7 is adjusted, and if the judging result is still negative, and after the pressure fluctuation value in the ink supply box 6 and/or the circulating ink box 8 exceeds a certain value, stopping adjusting the relative height between the liquid level of the ink supply box 6 and/or the circulating ink box 8 and the nozzle 7, directly adjusting the pressure in the ink supply box 6 and/or the circulating ink box 8, so that the pressure fluctuation value between the ink supply box 6 and/or the circulating ink box 8 is adjusted within a preset range, such as within 10%, and then starting to adjust the relative height between the liquid level of the ink supply box 6 and/or the circulating ink box 8 and the nozzle 7, so that the pressure in the ink supply box 6 and/or the circulating ink box 8 tends to be stable. A fluctuation value of less than 1% is generally considered to be pressure plateau.
When the pressure fluctuation is large, the method adjusts the relative height between the liquid level of the ink supply box 6 and/or the circulating ink box 8 and the spray head 7, ensures that the influence of the liquid level of the ink supply box 6 and/or the circulating ink box 8 on the spray head 7 is reduced to the minimum, and is convenient for controlling the pressure to be stable, thus realizing stable pressure-stabilizing circulating ink supply; the technical problem that the fluctuation of the pressure value in the ink supply box 6 or the circulating ink box 8 is large in the existing circulating ink supply system is solved; has the advantage of stable pressure ink supply.
The distance P over which the ink supply cartridge 6 needs to be lifted is calculated according to the following formula 1 ＝h+l+L+p。
Wherein P is 1 The ink jet pressure of the nozzle 7 is L the distance that the ink supply box 6 needs to lift, h the liquid level height in the ink supply box 6, L the installation distance between the ink supply box 6 and the nozzle 7, and p the supplyPressure within the ink cartridge 6; thus, at the ink-jet pressure P 1 When the required value is set, the ink supply box 6 needs to be lifted by a distance L=h+l+p-P 1 . Therefore, the pressure and the liquid level height in the ink supply box 6 can be obtained in real time, namely the height of the ink supply box 6 required to be lifted can be converted, and the lifting of the ink supply box 6 is further controlled in real time, so that the height of the ink supply box 6 is changed along with the pressure and the liquid level, and the inkjet pressure of the nozzle 7 is ensured to be always kept at a fixed value.
It should be noted that, the installation distance l between the ink supply cartridge 6 and the nozzle 7 is the initial distance between the ink supply cartridge 6 and the nozzle 7, for example, when the first pressure stabilizing circulation ink supply method and the device are started, i is the installation distance between the ink supply cartridge 6 and the nozzle 7, and this value can be preset in the system or can be automatically deducted when in the formula; when the pressure stabilizing circulation ink supply method and device are debugged for the 2 nd time or the N th time, the value of the l is the distance from the final ink supply box 6 to the spray head 7 recorded in the last adjustment, and the distance is the horizontal relative height.
Preferably, the step of adjusting the relative height of the liquid level of the ink supply cartridge 6 and/or the circulation cartridge 8 and the head 7 comprises: s41, acquiring the actual height of the liquid level of the ink supply box 6 and/or the circulating ink box 8 so as to adjust the relative height of the ink supply box 6 and/or the circulating ink box 8 and the spray head 7.
In the present embodiment, liquid level detection switches are provided in the ink supply tank 6 and the circulation tank 8, respectively, to detect the actual height of the liquid level thereof; in general, the nozzle 7 has a constant installation height, and the installation positions of the ink supply tank 6 and the circulation tank 8 are also fixed, and the relative height between the ink supply tank 6 or the circulation tank 8 and the nozzle 7 can be obtained by detecting the liquid level height of the ink supply tank 6 or the circulation tank 8.
Preferably, as shown in fig. 2, the method further comprises: and S5, when the ink path circulation is finished, the pressure of the ink supply box 6 and the circulating ink box 8 is switched so as to control ink pressing.
In this embodiment, when the ink path circulates, the pressure in the ink supply box 6 is greater than the pressure in the circulating ink box 8, so that the ink flows from the ink supply box 6 through the nozzle 7 and then flows out of the circulating ink box 8; when the ink path circulation is finished, the pressure in the ink supply box 6 and the circulating ink box 8 is switched, so that the pressure in the ink supply box 6 is smaller, the pressure in the circulating ink box 8 is larger, and the ink pressing is controlled; when it is necessary to clean the head 7, the ink pressure is controlled to clean the head 7. The ink may be a cleaning liquid 16 or water.
Preferably, as shown in fig. 3, the method further comprises: s6, detecting the value of the relevant parameter of the ink in the circulating ink box 8; and S7, judging whether the numerical value of the related parameter is in a preset range, and controlling the flow direction of the ink at the output end of the circulating ink according to a judging result.
In this embodiment, the relevant parameters include: one of the conductivity of the ink, the viscosity of the ink and the density of the ink, a conductivity meter is arranged to detect the conductivity and a viscometer to detect the viscosity of the ink; detecting density by a densitometer; the ink in the ink supply box 6 can be polluted or precipitated in the using process, so that the ink in the circulating ink box 8 is deteriorated; and detecting the relevant parameters of the ink in the circulating ink box 8, judging that the relevant indexes of the ink are matched with a preset range, obtaining a range corresponding to the numerical value of the relevant parameters, and outputting the ink to different positions, so that the ink can be conveniently recovered and recycled. If the relative parameter value of the ink is smaller, such as the conductivity is smaller than a preset value, the density is smaller than a preset value, and the viscosity is smaller than a preset value, the pollution degree of the ink is lower, and the ink is controlled to flow to the ink supply box 6 for recycling. Otherwise, the ink is collected and scrapped or treated and recycled.
Preferably, the recycling system includes a waste cartridge 12, and controlling the flow direction of the ink at the recycled ink output end includes: controlling the ink flow of the circulating ink output end to the circulating ink cartridge 8 or controlling the ink flow of the circulating ink output end to the waste ink cartridge 12.
In this embodiment, when the value of the relevant parameter is high, ink is collected to the waste cartridge 12, facilitating the collection and recovery process.
A second aspect of the present utility model provides a regulated circulation ink supply apparatus for supplying ink to a nozzle, as shown in fig. 4, comprising: an ink supply box 6 and a circulating ink box 8 which are sequentially communicated through ink pipes; a pressure detecting mechanism 13 for detecting the current pressure of the ink supply cartridge 6 and/or the circulation cartridge 8 in real time; the control mechanism is used for judging whether the fluctuation value of the current pressure of the ink supply box 6 and/or the circulating ink box 8 is in a preset range or not according to the pressure detected by the pressure detection mechanism, and correspondingly outputting a control signal; and the height adjusting mechanism 15 is used for adjusting the relative height between the liquid level of the ink supply box 6 and/or the circulating ink box 8 and the spray head 7 according to the control signal so as to enable the pressure fluctuation value of the ink supply box 6 and/or the circulating ink box 8 to be in a preset range.
In the present embodiment, the height adjusting mechanism 15 includes: mounting bracket, adjusting screw, step motor and inductor thereof. The mounting bracket is connected with the adjusting screw rod, and the stepping motor is connected with the adjusting screw rod. The stepping motor drives the adjusting screw rod to rotate in a rotating way, so that the mounting bracket is driven to move, and the ink supply is driven to rise and fall; the sensor is used for sensing the lifting speed of the height adjusting mechanism 15. The height adjusting mechanism is not shown in the figure and is also arranged at the position of the circulating ink box, and the structure is consistent with the height adjusting mechanism arranged at the position of the main ink box 6, so that the embodiment of the utility model is not repeated one by one.
The pressure detection mechanism is arranged to detect the pressure of the ink supply box 6, the controller tests the actual pressure acting on the spray head 7 through the pressure and controls the height adjustment mechanism 15 to adjust the relative height of the ink supply box 6 and the spray head 7 with the theoretical value required by the spray head 7, and the pressure actually applied by the spray head 7 is influenced by the relative height between the ink supply box 6 and the spray head 7 besides the pressure directly applied by the ink supply box 6, so that the related pressure information is detected, namely the height can be adjusted, the height is changed along with the change of the pressure, and the final pressure of the spray head 7 is always kept to be the required theoretical value; in addition, the actual pressure acting on the nozzle 7 is also affected by the height of the liquid level of the ink supply box 6, when the pressure change of the ink supply box 6 is not large, or when a constant pressure device is arranged in the ink supply box 6, the pressure in the ink supply box is kept unchanged or the change is negligible, the liquid level in the ink supply box 6 is lower and lower along with printing, and the quantity of the ink in the ink supply box 6 influences the ink jet pressure of the nozzle 7 because of different ink quantity in the ink supply box 6 and different flowing pressure, so that the distance between the ink supply box 6 and the nozzle 7 can be adjusted according to the detected liquid level information in the ink supply box 6, the relative distance between the ink supply box 6 and the nozzle 7 is changed along with the change of the liquid level in the ink supply box 6, and the influence of the change of the liquid level on the ink jet pressure of the nozzle 7 is reduced to the minimum.
Therefore, according to the theoretical value of the nozzle 7 and the pressure in the ink supply box 6 tested, the relative height requirement from the ink supply box 6 to the nozzle 7 can be deduced, and the height adjusting mechanism 15 is controlled to adjust the relative height between the ink supply box 6 and the nozzle 7, so that the distance before the ink supply box 6 can provide a stable ink jet pressure along with the external change. Solves the technical problem that the ink jet quantity and the ink jet speed of the spray head 7 are difficult to control in the existing pressure stabilizing circulation ink supply device; the ink jet amount of the nozzle 7 can be precisely controlled, and the ink jet speed can be improved.
Preferably, the apparatus further comprises: the liquid level detection mechanism is used for acquiring the actual liquid level height of the ink supply box 6 and/or the circulating ink box 8 and sending a liquid level signal to the height adjustment mechanism 15; the height adjusting mechanism 15 adjusts the relative heights of the ink supply cartridge 6 and/or the circulation cartridge 8 and the head 7 according to the liquid level signal.
In the present embodiment, the liquid level detection mechanism includes a first liquid level detection mechanism 14 and a second liquid level detection mechanism 17, which are respectively provided in the ink supply cartridge 6 and the circulation cartridge 8; the first liquid level detecting mechanism 14 is disposed in the ink supply tank 6, and is configured to detect liquid level information in the ink supply tank 6. The first liquid level detection mechanism 14 is set as a magnetostrictive liquid level meter, and converts a voltage signal or a current signal of the magnetostrictive liquid level meter into an actual liquid level height; the magnetostrictive liquid level meter is arranged in the ink supply box 6; in other embodiments, the weight of the ink amount may be detected by a pressure sensor and converted to a liquid level in the ink supply cartridge 6.
The second liquid level detecting mechanism 17 is provided in the circulation tank 8 for detecting the liquid level inside the circulation tank 8.
In the present embodiment, the second liquid level detection mechanism 17 is selected as a magnetostrictive liquid level gauge; converting the voltage signal or the current signal of the magnetostrictive liquid level meter into the actual liquid level height; presetting the lowest liquid level and the highest liquid level in the circulating ink box 8, comparing the liquid level height of the circulating ink box 8 with the lowest liquid level, and stopping discharging the ink in the circulating ink box 8 if the current liquid level height is smaller than the minimum liquid level requirement; if the current liquid level is higher than the highest liquid level requirement, starting to circulate the ink in the ink box 8 to discharge and sending out an alarm signal; to ensure that the ink of the circulating ink cartridge 8 can be normal and avoid overflowing.
The distance P over which the ink supply cartridge 6 needs to be lifted is calculated according to the following formula 1 ＝h+l+L+p。
Wherein P is 1 The ink jet pressure of the nozzle 7 is L which is the distance that the ink supply box 6 needs to lift, h is the liquid level height in the ink supply box 6, L is the installation distance between the ink supply box 6 and the nozzle 7, and p is the pressure in the ink supply box 6; thus, at the ink-jet pressure P 1 When the required value is set, the ink supply box 6 needs to be lifted by a distance L=h+l+p-P 1 . Therefore, the pressure and the liquid level height in the ink supply box 6 can be obtained in real time, namely the height of the ink supply box 6 required to be lifted can be converted, and the lifting of the ink supply box 6 is further controlled in real time, so that the liquid level height of the ink supply box 6 is changed along with the pressure and the liquid level, and the inkjet pressure of the nozzle 7 is ensured to be always kept at a constant value.
It should be noted that, the installation distance l between the ink supply cartridge 6 and the nozzle 7 is the initial distance between the ink supply cartridge 6 and the nozzle 7, for example, when the first pressure stabilizing circulation ink supply method and the device are started, i is the installation distance between the ink supply cartridge 6 and the nozzle 7, and the value can be preset in the system or can be automatically deducted when the formula is edited; when the pressure stabilizing circulation ink supply method and device are debugged for the 2 nd time or the N th time, the value of the l is the distance from the final ink supply box 6 to the spray head 7 recorded in the last adjustment, and the distance is the horizontal relative height.
Preferably, as shown in fig. 5, the device further comprises a first pressure system, a second pressure system, a first switching element 22 and a second switching element 26; the first pressure system communicates with the ink supply cartridge 6 or the circulation cartridge 8 through the first switching element 22; the second pressure system communicates with the ink supply cartridge 6 or the circulation cartridge 8 via a second switching element 26.
Preferably, the pressure of the first pressure system is greater than the pressure of the second pressure system.
In this embodiment, the pressure of the first pressure system is greater than the pressure of the second pressure system, preferably the first pressure system is positive pressure or is open to the atmosphere, the second pressure system is negative pressure, and the first pressure provides a pressure to the ink supply cartridge 6 to enable ink to flow from the ink supply cartridge 6 to the circulating ink cartridge 8 due to the pressure difference between the first pressure system and the second pressure system, so that ink circulation is realized, and the nozzle 7 is kept not blocked; a one-way valve is provided between the nozzle 7 and the circulation tank 8 so that ink can only flow from the nozzle 7 to the circulation tank 8.
The first pressure system is connected with a first switch element 22, and the first switch element 22 enables the first pressure system to be communicated with the ink supply box 6 or the circulating ink box 8; the second pressure system is connected with a second switch element 26, and the second switch element 26 enables the second pressure system to be communicated with the ink supply box 6 or the circulating ink box 8; the first pressure system includes: a first pressure source 19, a first flow regulator 20, and a first buffer element 21, the first buffer element 21 being in communication with a first switch element 22, the first switch element 22 being selected as a three-way valve, the other two ends of the first switch element 22 being in communication with the second pressure system and the circulation cartridge 8, respectively; the second pressure system includes: a second pressure source 23, a second flow regulator 24, and a second buffer element 25, the second buffer element 25 being in communication with a second switching element 26, the second switching element 26 being selected as a three-way valve, the other two ends of the second switching element 26 being in communication with the first pressure system and the ink supply cartridge 6, respectively; when the ink pressing is stopped or the air in the spray head 7 is discharged completely, the first switch element 22 and the second switch element 26 are switched, so that the second pressure system is communicated with the ink supply box 6, negative pressure is formed inside the ink supply box 6, the ink of the spray head 7 is sucked, the ink pressing is stopped, and due to the arrangement of the first buffer element 21 and the second buffer element 25, when the first pressure system and the second pressure system are switched on, the pressure in the first buffer element 21 and the second buffer element 25 rapidly fills the original pressure in the ink supply box 6, the pressure in the ink supply box 6 is further rapidly and stably supplied, and the ink dropping condition of the spray head 7 is further conveniently controlled. Because the one-way valve is arranged between the spray head 7 and the circulating ink box 8, the one-way valve only allows ink to flow from the spray head 7 to the circulating ink box 8, so that when the second pressure is communicated into the circulating ink box 8, the ink in the circulating ink can not flow to the spray head 7, and therefore, when negative pressure is needed to be provided for the ink supply box 6, a negative pressure source is not needed to be additionally arranged, the communication mode between the first pressure system and the second pressure system is directly switched, the resources are saved, and the operation is simple.
The first pressure system is arranged, and the first pressure system is provided with a flow regulating valve, when the flow regulating valve is used for regulating, the pressure entering the ink supply box 6 is set, so that the pressure in the ink supply box 6 is at a moderate pressure, and the relative height between the ink supply box 6 and the spray head 7 is conveniently regulated by the height regulating mechanism 15. If the fluctuation of the pressure value in the ink supply box 6 is large in the adjustment process, the positive pressure and the negative pressure are adjusted after the adjustment of the height adjusting mechanism 15, so that the ink supply method and the device are stable in the whole pressure stabilizing cycle.
In addition, presetting a minimum liquid level and a maximum liquid level in the ink supply box 6, comparing the liquid level height of the ink supply box 6 with the minimum liquid level, and filling ink into the ink supply box 6 if the current liquid level height is smaller than the minimum liquid level requirement so as to ensure that the ink of the ink supply box 6 can be normally supplied; if the current liquid level is higher than the highest liquid level, the filling of ink into the ink supply box 6 is stopped, so that the ink of the ink supply box 6 can be ensured to be normal, and overflow is avoided.
Preferably, the apparatus further comprises: the main ink cartridge 1, the main ink cartridge 1 communicates with the ink supply cartridge 6, and supplies ink to the ink supply cartridge 6.
In the present embodiment, the steady pressure circulation ink supply device further includes an ink supply pump 3, an ink filter 4, and an ink buffer device 5; the main ink box 1, the ink supply pump 3, the ink filter 4, the ink buffer device 5 and the ink supply box 6 are sequentially communicated through ink pipes, and the ink supply pump 3 starts to pump the ink in the main ink box 1 into the ink supply box 6 according to the requirement; the ink supply box 6 is timely supplied with ink, and the ink of the ink supply box 6 is prevented from being used up; an ink filter 4 is arranged to filter the ink; the ink buffer device 5 is provided so that the ink is buffered in the buffer device for a period of time and then enters the ink supply box 6. A filter is further arranged between the ink supply box 6 and the spray head 7, and ink of the ink supply box 6 is filtered and then enters the spray head 7, so that bubbles generated when the ink rapidly enters the ink box are reduced. In addition, the liquid level signal of the ink supply box 6 is detected, the controller controls the ink supply pump 3 to work, on one hand, the supply of ink is complemented, on the other hand, the speed of the ink supply pump 3 is controlled to be matched with the liquid level of the ink supply box 6, the change of the liquid level is reduced, and the easy control degree of the ink jet pressure of the whole spray head 7 is further improved.
A fifth switch element 2 is also communicated between the main ink box 1 and the ink supply box 6, the fifth switch element 2 is set as a three-way valve, the other end of the fifth switch element 2 is connected with a cleaning liquid 16, and when the ink path needs to be cleaned, the ink supply pump 3 pumps the cleaning liquid 16 to clean the whole ink path; has the advantage of automatically cleaning the ink path.
Preferably, the apparatus further comprises a waste cartridge 12 and a third switching element 10; the circulation tank 8 communicates with the ink supply tank 6 or the waste tank 12 through a third switching element 10.
Preferably, the apparatus further comprises: a fourth switching element 11, the fourth switching element 11 making the third switching element 10 communicate with the waste ink tank 12 or the main ink tank 1.
In this embodiment, the apparatus further includes: and a circulation pump 9, wherein one end of the circulation pump 9 is communicated with the circulation ink box 8, and a fourth switch element 11 enables the circulation pump 9 to be communicated with the ink supply box 6 or the main ink box 1. The third switching element 10 is provided as a three-way valve, and the circulation pump 9 pumps the ink in the circulation tank 8 to the ink supply tank 6 or back to the main tank 1, so that the ink forms a circulation circuit. The fourth switching element 11 communicates the third switching element 10 with the main cartridge 1 or the waste cartridge 12. The fourth switch element 11 is provided as a three-way valve, and the discharged ink can be selectively returned to the main ink tank 1 or discharged to the waste ink tank 12, so that the ink can be discharged to one of the ink supply tank 6, the main ink tank 1 and the waste ink tank 12 according to the contamination degree of the ink, thereby realizing the functions of waste ink collection, ink recovery and ink circulation.
Preferably, the apparatus further comprises: an ink buffer device 5, the ink buffer device 5 being provided between the main ink cartridge 1 and the ink supply cartridge 6.
In this embodiment, the ink buffer device 5 is provided to buffer the ink from the main ink cartridge 1 to the ink supply cartridge 6, so as to avoid the ink from being directly drawn from the main ink cartridge 6 to the ink supply cartridge 6, and cause excessive fluctuation in the ink supply cartridge 6.
Preferably, the apparatus further comprises: a heating device 18, wherein the heating device 18 is used for heating the ink tube among the ink supply box 6, the spray head 7 and the circulating ink box 8.
In the present embodiment, the heating device 18 is provided as a spiral heating wire which is sleeved outside the ink tube between the ink supply cartridge 6, the nozzle 7 and the circulation cartridge 8; a temperature measuring element is correspondingly arranged in front of the ink inlet of the nozzle 7 and is used for testing the temperature of the ink entering the ink box; the heating device 18 heats the ink tube, ensures that the temperature of the ink entering the nozzle 7 is moderate, and has good fluidity.
The flow control flow of the pressure stabilizing circulating ink supply device provided by the utility model comprises the following steps: when the system is in standby, the ink supply box 6 and the circulating ink box 8 are in a low liquid level mode, and the ink supply pump 3 and the circulating ink pump are in a low flow mode at the moment, so that the ink forms a circulation in the whole ink path; when printing is started, the ink supply pump 3 is in a high flow mode, ink is pumped from the main ink box 1 to the ink supply box 6, the circulating ink pump is in a medium flow mode, the circulating ink box 8 adopts a medium liquid level mode, and the circulating ink is realized while printing. After printing, the ink supply pump 3 is in a low flow mode, the ink supply box 6 is in a low liquid level mode, the ink pump is in a high flow mode, and the ink flows back to the main ink box 1; when the liquid level in the circulating ink cartridge 8 is lower than the minimum liquid level setting for the first time, the circulating pump 9 is in the low flow mode. And switching to a standby state.
The apparatus further comprises: a pollution detection mechanism for detecting the relevant parameters of the ink in the circulating ink cartridge 8; and judging whether the related parameters are in a preset range or not so as to control the flow direction of the ink at the output end of the circulating ink.
In this embodiment, the relevant parameters include: one of the conductivity of the ink, the viscosity of the ink and the density of the ink, a conductivity meter is arranged to detect the conductivity and a viscometer to detect the viscosity of the ink; detecting density by a densitometer; the ink in the ink supply box 6 can be polluted or precipitated in the using process, so that the ink in the circulating ink box 8 is deteriorated; and detecting the relevant parameters of the ink in the circulating ink box 8, judging that the relevant indexes of the ink are matched with a preset range, obtaining the range corresponding to the relevant parameter values, and outputting the ink to different positions, so that the ink can be conveniently recovered and recycled. If the relative parameter value of the ink is smaller, such as the conductivity is smaller than a preset value, the density is smaller than a preset value, and the viscosity is smaller than a preset value, the pollution degree of the ink is lower, and the ink is controlled to flow to the ink supply box 6 for recycling. Otherwise, the ink is collected and scrapped or treated and recycled.
The principle of implementation of the embodiment of the utility model is as follows: the pressure and the liquid level information in the ink supply box 6 are tested, the controller judges the distance between the ink supply box 6 and the nozzle 7 according to the pressure and the liquid level information in the ink supply box 6 and the ink jet pressure required by the nozzle 7, and the height of the ink supply box 6 relative to the nozzle 7 is adjusted according to the initial relative height between the ink supply box 6 and the nozzle 7.
Another aspect of an embodiment of the present utility model provides a printing apparatus comprising a circulating ink supply device as described in any one of the preceding claims.
The pressure stabilizing circulation ink supply device has all the advantages of the pressure stabilizing circulation ink supply device because any one of the pressure stabilizing circulation ink supply devices is adopted.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (9)
1. A regulated cyclic ink supply method for use in a cyclic ink supply system for supplying ink to a spray head, comprising: an ink supply box and a circulating ink box which are sequentially communicated through ink pipes; the method is characterized by comprising the following steps of:
detecting the current pressure of the ink supply box and/or the circulating ink box in real time;
judging whether the pressure fluctuation value of the current pressure of the ink supply box and/or the circulating ink box is in a preset range or not according to the pressure detected by the pressure detection mechanism;
if the judgment result is negative, adjusting the relative height between the liquid level of the ink supply box and/or the circulating ink box and the spray head so that the pressure fluctuation value of the ink supply box and/or the circulating ink box is in a preset range;
if the judgment result is yes, stopping adjusting the relative height between the liquid level of the ink supply box and/or the circulating ink box and the spray head, and controlling the circulation of the ink path;
detecting the value of a related parameter of the ink in the circulating ink box; judging whether the numerical value of the related parameter is in a preset range, and controlling the flow direction of the ink at the circulating ink output end according to a judging result; wherein the relevant parameter includes any one of conductivity of the ink, viscosity of the ink, and density of the ink.
2. The method of regulated pressure circulation ink supply according to claim 1, wherein the step of adjusting the relative height of the liquid level of the ink supply tank and/or the circulation tank and the ejection head comprises: and acquiring the actual liquid level height of the ink supply box and/or the circulating ink box so as to adjust the relative height of the ink supply box and/or the circulating ink box and the spray head.
3. The regulated circulation ink supply method of claim 1, further comprising: when the ink path circulation is finished, the pressure of the ink supply box and the circulating ink box is switched so as to control ink pressing.
4. The regulated circulation ink supply method according to claim 1, wherein the circulation ink supply system includes a waste ink tank, a main ink tank, and an ink supply tank, and wherein controlling the flow direction of the ink at the circulation ink output end includes:
controlling the ink at the output end of the circulating ink to flow to the main ink box;
controlling the ink flow of the circulating ink output end to the ink supply box;
or controlling the ink at the output end of the circulating ink to flow to the waste ink box.
5. A pressure stabilizing circulation ink supply device for supplying ink to a nozzle, comprising: an ink supply box and a circulating ink box which are sequentially communicated through ink pipes;
the pressure detection mechanism is used for detecting the current pressure of the ink supply box and/or the circulating ink box in real time;
the control mechanism is used for judging whether the pressure fluctuation value of the current pressure of the ink supply box and/or the circulating ink box is in a preset range or not according to the pressure detected by the pressure detection mechanism, and correspondingly outputting a control signal;
the height adjusting mechanism is used for adjusting the relative height between the liquid level of the ink supply box and/or the circulating ink box and the spray head according to the control signal so that the pressure fluctuation value of the ink supply box and/or the circulating ink box is within a preset range;
if the judgment result is negative, adjusting the relative height between the liquid level of the ink supply box and/or the circulating ink box and the spray head so that the pressure fluctuation value of the ink supply box and/or the circulating ink box is in a preset range;
if the judgment result is yes, stopping adjusting the relative height between the liquid level of the ink supply box and/or the circulating ink box and the spray head, and controlling the circulation of the ink path;
detecting the value of a related parameter of the ink in the circulating ink box; judging whether the numerical value of the related parameter is in a preset range, and controlling the flow direction of the ink at the circulating ink output end according to a judging result; wherein the relevant parameter includes any one of conductivity of the ink, viscosity of the ink, and density of the ink.
6. The circulating ink supply of claim 5, further comprising: the liquid level detection mechanism is used for acquiring the actual liquid level height of the ink supply box and/or the circulating ink box and sending a liquid level signal to the height adjustment mechanism; and the height adjusting mechanism adjusts the relative height of the ink supply box and/or the circulating ink box and the spray head according to the liquid level signal.
7. The circulating ink supply of claim 5, further comprising a first pressure system, a second pressure system, a first switching element, and a second switching element; the first pressure system is communicated with the ink supply box or the circulating ink box through the first switch element; the second pressure system is communicated with the ink supply box or the circulating ink box through the second switch element.
8. The circulating ink supply apparatus of any one of claims 5 to 7, further comprising a waste ink cartridge and a third switching element; the circulating ink cartridge communicates with the ink supply cartridge or the waste ink cartridge through the third switching element.
9. A printing apparatus comprising a circulating ink supply according to any one of claims 5 to 8.
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