CN109664618B - Ink supply control system, printing machine, and ink supply control method - Google Patents
Ink supply control system, printing machine, and ink supply control method Download PDFInfo
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- CN109664618B CN109664618B CN201710957304.0A CN201710957304A CN109664618B CN 109664618 B CN109664618 B CN 109664618B CN 201710957304 A CN201710957304 A CN 201710957304A CN 109664618 B CN109664618 B CN 109664618B
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- electromagnetic valve
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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
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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
- B41J2/18—Ink recirculation systems
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Abstract
The invention provides an ink supply control system, a printing machine and an ink supply control method. Wherein, the ink supply control system includes: the ink inlet electromagnetic valve is arranged between the ink inlet cavity and the spray head; the ink return electromagnetic valve is arranged between the ink return cavity and the spray head; a control device; the ink supply control system provided by the invention has a simple structure, saves the consumption of ink during ink drop maintenance of the printing machine of the spliced module component spray head, prolongs the service life of the spray head, accurately controls the actual ink drop time, and avoids the difficulty of frequently replacing the spliced module spray head.
Description
Technical Field
The invention relates to the technical field of ink supply in ink jet printing, in particular to an ink supply control system, a printing machine and an ink supply control method.
Background
In the field of inkjet printing technology, inkjet printers typically use a nozzle-splicing module to print wide-format print jobs. The split sub-head module apparatus shown in fig. 1 has three heads (a first head 102, a second head 104, and a third head 106), and as can be seen from the top view shown in fig. 2, the first head 102, the second head 104, and the third head 106 effectively extend the printing width, and integrate the functions of installing two or more heads in a single module. In the prior art, only one secondary ink box is installed in one splicing type module, ink can be conveyed to all nozzles from an ink inlet cavity in the secondary ink box through an ink pipe during ink dripping maintenance, all nozzles connected to the ink box can drip ink, and the ink consumption is huge. The spliced module does not measure the pressure of a single spray head, and only measures the pressure in the ink inlet cavity and the ink return cavity in the secondary ink box. If a certain nozzle has a good printing effect and does not need ink dropping maintenance, a large amount of ink is wasted. In addition, when the ink supply system is closed, because the temperature of the ink in the system can be rapidly reduced, the air in the ink inlet cavity and the air in the ink return cavity of the secondary ink box expand with heat and contract with cold, so that the negative pressure is increased, namely, a large amount of air and impurities are sucked at the spray head, and the service life of the spray head is seriously influenced. Secondly, when the nozzle is in the ink dropping maintenance stage, ink needs to be pumped into the secondary ink box from the ink supply pump, and the ink cavity in the secondary ink box compresses the air in the ink cavity to release positive pressure due to ink pumping, so that the ink can rapidly flow into the nozzle to perform ink dropping maintenance. During this time, the air in the ink inlet cavity is not compressed instantaneously to generate positive pressure, and it takes a certain time to compress the air in the ink cavity. That is, when the pressure at the nozzle reaches a certain positive pressure, the ink will drip from the nozzle, so there is a certain error in the actual ink dripping time. Similarly, after the ink dropping maintenance is finished, the ink return pump needs to pump the ink in the ink return cavity in the secondary ink box to generate negative pressure, and the volume of the gas in the ink cavity is increased. Namely, when the nozzle reaches a certain negative pressure, the ink can not overflow from the nozzle, so that the ink leakage condition can be caused. During this time, the negative pressure fluctuation on the surface of the head is large, which causes a situation where gas is sucked into the head, resulting in poor printing of the head.
Therefore, how to solve when the concatenation formula modular component shower nozzle drips the china ink and maintains, save the consumption of dripping the china ink and maintaining the china ink, increase the life-span of shower nozzle, accurate control actually drips black time, avoids frequently changing concatenation formula module shower nozzle to become the problem that needs a urgent need to be solved.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first aspect of the present invention is directed to an ink supply control system.
A second aspect of the invention is directed to a printing press.
A third aspect of the present invention is to provide an ink supply control method.
In view of the above, according to one aspect of the present invention, an ink supply control system is provided for a circulating ink supply system of a printing machine, wherein the circulating ink supply system includes at least one nozzle, a secondary ink tank including an ink inlet chamber and an ink return chamber isolated from each other, a first pressure sensor disposed in the ink inlet chamber, and a second pressure sensor disposed in the ink return chamber, the ink supply control system includes: the ink inlet electromagnetic valve is arranged between the ink inlet cavity and the spray head; the ink return electromagnetic valve is arranged between the ink return cavity and the spray head; a control device; the control device is electrically connected with the ink inlet solenoid valve and the ink return solenoid valve and is used for controlling the working states of the ink inlet solenoid valve and the ink return solenoid valve according to different working instructions.
The ink supply control system provided by the invention is used for controlling the ink supply system to be a circulating ink supply system, the circulating ink supply system can be a single spray head, more preferably a spliced module multi-spray head, the ink supply control system comprises at least one ink inlet electromagnetic valve, at least one ink return electromagnetic valve and a control device, the number of the ink inlet electromagnetic valves and the ink return electromagnetic valves is determined according to the number of branch heads, one spray head is provided with one ink inlet electromagnetic valve and one ink return electromagnetic valve, of course, one spray head can be provided with a plurality of ink inlet electromagnetic valves and a plurality of ink return electromagnetic valves according to the requirement of actual conditions, thus, each spray head is provided with an electromagnetic valve which works independently, when the spliced module carries out ink dropping or ink supply on the single spray head, only the electromagnetic valve corresponding to the spray head is controlled to be opened, the electromagnetic valves corresponding to other spray heads are controlled to be closed, and the control on the single, the consumption of ink is saved. Specifically, each ink inlet electromagnetic valve is arranged between the corresponding spray head and the ink inlet cavity in the secondary ink box, each ink return electromagnetic valve is arranged between the corresponding spray head and the ink return cavity in the secondary ink box, and the control device is electrically connected with each ink inlet electromagnetic valve and each ink return electromagnetic valve respectively; on the other hand, accurate control of the actual ink dropping time is achieved.
The ink supply control system according to the present invention may further have the following technical features:
in the above technical solution, preferably, the working state at least includes an open/close state and an open/close time.
In the technical scheme, the control device controls the working states of the ink inlet solenoid valve and the ink return solenoid valve, particularly controls the opening and closing states and the opening and closing time of the ink inlet solenoid valve and the ink return solenoid valve, and because the good control maintains the pressure of ink inlet and ink return at two ends of the nozzle is a necessary condition for ensuring good printing quality of the nozzle, the pressure inside the nozzle is adjusted by opening or closing the ink inlet solenoid valve and the ink return solenoid valve in different time, so that the control of the pressure of the nozzle is really realized, the printing quality is improved, and the ink consumption is saved.
According to a second aspect of the present invention, there is provided a printing press comprising an ink supply circulation system and an ink supply control system as in any one of the above claims, the ink supply control system being arranged to control the ink supply circulation system.
The printing machine provided by the invention comprises the ink supply control system in any technical scheme, so that the printing machine has all the beneficial effects of the ink supply control system, and the details are not repeated.
According to a third aspect of the present invention, there is provided an ink supply control method for controlling an ink supply control system in any one of the above aspects, comprising: detecting a received work order; and controlling the working states of the ink inlet solenoid valve and the ink return solenoid valve according to different working instructions.
The ink supply control method provided by the invention is used for controlling the ink supply control system in any technical scheme, firstly, the received working instructions are detected, the working processes for executing the working instructions are different, the actual problems possibly to be solved in different working processes are different, and the pressure in the spray head is required to be different, so that the working states of one or more ink inlet electromagnetic valves and one or more ink return electromagnetic valves are controlled according to different working instructions, and the control of a single spray head and the accurate control of the pressure in the spray head are realized.
The ink supply control method according to the present invention may further include the following features:
in the above technical solution, preferably, the working state at least includes an open/close state and an open/close time.
In the technical scheme, the working states of the ink inlet solenoid valve and the ink return solenoid valve are controlled, specifically, the open-close states and the open-close times of the ink inlet solenoid valve and the ink return solenoid valve are controlled, and because the good control maintains the pressure of ink inlet and ink return at two ends of the nozzle to be a necessary condition for ensuring good printing quality of the nozzle, the pressure inside the nozzle is adjusted by opening or closing the ink inlet solenoid valve and the ink return solenoid valve in different time, so that the control of the pressure of the nozzle is really realized, the printing quality is improved, and the ink consumption is saved.
In any of the above technical solutions, preferably, the process of controlling the operating states of the ink inlet solenoid valve and the ink return solenoid valve according to different operating instructions specifically includes: when the working instruction is an ink dripping maintenance opening instruction, acquiring a spray head corresponding to the ink dripping maintenance opening instruction; controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be closed; acquiring a first pressure value detected by a first pressure sensor; and when the first pressure value reaches a first preset value, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to open for ink dropping maintenance.
In this technical solution, the process of controlling the operating states of at least one ink inlet solenoid valve and at least one ink return solenoid valve according to different operating instructions, in particular one of the following cases: when the working instruction is an ink dropping maintenance opening instruction, the ink dropping maintenance instruction is usually only for a certain spray head or certain spray heads, then the spray head corresponding to the ink dropping maintenance opening instruction is obtained, the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head are controlled to be closed briefly, the positive pressure value detected by the first pressure sensor in the secondary ink box of the ink supply circulating system is continuously increased at the moment, the first pressure value detected by the first pressure sensor is obtained, when the positive pressure value detected by the first pressure sensor reaches the first preset value, the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head are controlled to be opened at the moment, then the pressure of the spray head instantly meets the set pressure value, so that the surface of the spray head meets the set pressure value of ink dropping at the moment when the ink inlet electromagnetic valve and the ink return electromagnetic valve are opened, the ink immediately drips from the spray head, and the error between the actual ink dropping time and the preset ink dropping time, accurate control of effective ink drop time is achieved.
In any one of the above technical solutions, preferably, while controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to the ejection head to be closed, the method further includes: and controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to other nozzles except the nozzle corresponding to the ink dropping maintenance opening instruction to be normally closed.
In the technical scheme, when an ink dripping maintenance opening instruction is received, the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head are controlled to be closed, and meanwhile, the ink inlet electromagnetic valves and the ink return electromagnetic valves corresponding to other spray heads except the spray head corresponding to the ink dripping maintenance opening instruction are also controlled to be normally closed, so that the pressure of the surfaces of other collision heads except the spray head needing ink dripping maintenance is kept consistent with the pressure of an ink supply circulating system when ink is not dripped, the split type module component spray head printing machine is controlled independently when only a single spray head or a plurality of spray heads need ink dripping maintenance, ink dripping maintenance of other spray heads needing no ink dripping maintenance is avoided, and the consumption of ink is greatly saved.
In any of the above technical solutions, preferably, the process of controlling the operating states of the ink inlet solenoid valve and the ink return solenoid valve according to different operating instructions further includes: when the working instruction is an ink dropping maintenance closing instruction, closing an ink inlet electromagnetic valve and an ink return electromagnetic valve corresponding to the spray head; acquiring a second pressure value detected by the first pressure sensor and a third pressure value detected by the second pressure sensor; and when the second pressure value reaches a second preset value and the third pressure value reaches a third preset pressure value, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to open.
In the technical scheme, the process of controlling the working states of at least one ink inlet solenoid valve and at least one ink return solenoid valve according to different working instructions is as follows: when the ink dropping maintenance is finished, receiving an ink dropping maintenance closing instruction, because the pressure value of the ink in the secondary ink box can not be recovered to the set pressure value in a short time, the pressure at the nozzle can be greatly fluctuated, and at the moment, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the nozzle to be closed temporarily, so that the initial pressure value of the nozzle is continuously stabilized, and acquiring a second pressure value detected by the first pressure sensor and a third pressure value detected by the second pressure sensor, when the second pressure value reaches the second preset value and the third pressure value reaches the third preset pressure value, the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head are controlled to be opened, so that the pressure value of the surface of the spray head can reach the second preset value instantly, the spray head is prevented from sucking gas impurities due to large pressure fluctuation to cause poor printing effect of the spray head, and the service life of the spray head is prolonged.
In any of the above technical solutions, preferably, the process of controlling the operating states of the ink inlet solenoid valve and the ink return solenoid valve according to different operating instructions further includes: when the working instruction is an ink supply instruction, acquiring a spray head corresponding to the ink supply instruction; controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to open; and controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to other nozzles except the nozzles to be closed.
In this technical solution, the process of controlling the operating states of at least one ink inlet solenoid valve and at least one ink return solenoid valve according to different operating commands, wherein one of the conditions is: the working instruction is a normal ink supply instruction, all nozzles are required to be opened to perform ink jet printing under normal conditions, but when only one or a plurality of nozzles need to be controlled to work due to special printing positions and other requirements, then the nozzles corresponding to the ink supply instruction are obtained, the ink inlet electromagnetic valves and the ink return electromagnetic valves corresponding to the nozzles are controlled to be opened, the ink inlet electromagnetic valves and the ink return electromagnetic valves corresponding to other nozzles except the nozzles are controlled to be closed, so that the multiple nozzles are controlled independently, of course, when all the nozzles are required to work, the ink inlet electromagnetic valves and the ink return electromagnetic valves corresponding to all the nozzles are controlled to be opened, so that the pressure in the whole ink supply circulation system is stably circulated, and the normal ink supply printing of the ink supply circulation system of the printer is realized.
In any of the above technical solutions, preferably, the process of controlling the operating states of the ink inlet solenoid valve and the ink return solenoid valve according to different operating instructions further includes: when the working instruction is an ink supply stopping instruction, acquiring a spray head corresponding to the ink supply stopping instruction; and controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be closed.
In the technical scheme, the process of controlling the working states of at least one ink inlet electromagnetic valve and at least one ink return electromagnetic valve according to different working instructions is that the working instruction is an ink supply stopping instruction, and as the temperature of ink in an ink supply circulating system can be rapidly reduced, the air in an ink inlet cavity and the air in an ink return cavity of a secondary ink box expand with heat and contract with cold, so that negative pressure is increased, a large amount of air and impurities are sucked into a nozzle, and then the nozzle corresponding to the ink supply stopping instruction is obtained, and the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the nozzle are directly controlled to be closed, so that the internal pressure value of the nozzle is ensured to be stable, the surface of the nozzle is protected from sucking the air impurities or leaking ink, and the service life of the.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a spliced type spray head module separating device;
FIG. 2 is a schematic top view of a tiled sub-showerhead module;
FIG. 3 is a schematic diagram showing the configuration of an ink supply control system according to an embodiment of the present invention;
fig. 4 is a schematic structural view showing an ink supply control system according to another embodiment of the present invention;
FIG. 5 shows a block schematic diagram of the structure of a printing press of one embodiment of the present invention;
FIG. 6 is a flow chart showing an ink supply control method according to an embodiment of the present invention;
fig. 7 is a flowchart showing an ink supply control method according to another embodiment of the present invention.
Reference numerals:
wherein, the correspondence between the reference numbers and the part names in fig. 1 and fig. 2 is as follows:
102 first showerhead, 104 second showerhead, 106 third showerhead.
The correspondence between reference numerals and part names in fig. 3 is:
302 sprayer, 304 external ink tank, 306 ink supply main solenoid valve, 308 ink return main solenoid valve, 310 ink supply pump, 312 first filter, 314 ink return pump, 316 second filter, 318 secondary ink box, 320 ink inlet cavity, 322 ink return cavity, 324 first liquid pressure sensor, 326 second liquid pressure sensor, 328 ink inlet solenoid valve, 330 ink return solenoid valve, 332 control circuit board.
The correspondence between reference numerals and part names in fig. 4 is:
402 first nozzle, 404 second nozzle, 406 third nozzle, 408 secondary cartridge, 410 ink inlet chamber, 412 ink return chamber, 414 first ink inlet solenoid valve 414, 416 second ink inlet solenoid valve, 418 third ink inlet solenoid valve, 420 first ink return solenoid valve, 422 second ink return solenoid valve, 424 third ink return solenoid valve, 426 control circuit board 426, 428 ink inlet end, 430 ink return end.
Detailed Description
So that the manner in which the above recited aspects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
In the embodiment of the first aspect of the present invention, an ink supply control system is provided, and the ink supply control system provided by the present invention is described below with reference to fig. 3 and 4.
The ink supply control system provided by the invention is used for a circulating ink supply system of a printing machine, and the circulating ink supply system can be provided with one spray head 302 as shown in fig. 3, and can also be provided with a plurality of spray heads (a first spray head 402, a second spray head 404 and a third spray head 406) as shown in fig. 4.
The printing machine shown in fig. 3 has a circulating ink supply system with only one nozzle, or a specific circulating structure of one nozzle in a spliced type modular nozzle structure, and includes: the external ink barrel 304, the ink supply main electromagnetic valve 306 is in a normally closed state when the system is closed and is opened only after the system is opened, the ink return main electromagnetic valve 308 and the ink return main electromagnetic valve 308 are in a normally open state and are closed only when ink drop maintenance is carried out, the ink supply pump 310 is connected with a first filter 312 at an ink outlet end, an ink return pump 314 is connected with a second filter 316, the first filter 312 and the second filter are connected 316 and used for filtering impurities in ink, the secondary ink box 318 is composed of an ink inlet cavity 320 and an ink return cavity 322, a first liquid pressure sensor 324 and a second liquid pressure sensor 326 are respectively arranged in the ink inlet cavity 320 and the ink return cavity 322 for detecting the pressure values of the ink in the ink inlet cavity 320 and the ink return cavity 322 in real time and feeding back the ink supply pump 310 and the ink return pump 314 according to the pressure values measured in real time, therefore, the rotating speed and voltage values of the ink supply pump 310 and the ink return pump 314 are adjusted, and one purpose is to enable pressure difference to exist inside the ink inlet cavity 320 and the ink return cavity 322, so that ink flows and circulates in the whole ink supply circulation system, and inkjet printing and ink drop maintenance are realized. Secondly, the pressure on the surface of the nozzle 302 can be stabilized, so that the ink inlet and the ink return of the nozzle are in a long-term steady-state pressure. When the ink supply control system is used to control a circulating ink supply system as shown in fig. 3, the ink supply control system includes: the ink inlet solenoid valve 328, the ink inlet solenoid valve 328 are arranged between the ink inlet cavity 320 and the nozzle 302, the ink return solenoid valve 330 are arranged between the ink return cavity 322 and the nozzle 302, and the control circuit board 332, the control circuit board 332 and the ink inlet solenoid valve 328 and the ink return solenoid valve 330 are electrically connected and are used for controlling the working states of the ink inlet solenoid valve 328 and the ink return solenoid valve 330 according to different working instructions. Because the ink inlet solenoid valve 328 is arranged between the spray head 302 and the ink inlet cavity 320 in the secondary ink box 318, and the ink return solenoid valve 330 is arranged between the spray head 302 and the ink return cavity 322 in the secondary ink box 318, the control circuit board 332 controls the opening and closing of the solenoid valves to directly control the pressure on the surface of the spray head, so that the pressure value on the surface of the spray head is ensured to be stable, on one hand, the protection of the surface of the spray head from sucking gas impurities or leaking ink is realized, the service life of the spray head is prolonged, and the frequent replacement of the spliced module spray head is avoided; on the other hand, accurate control of the actual ink dropping time is achieved.
The printer shown in figure 4 is a circulating ink supply system and ink supply control system of a spliced module structure with a plurality of spray heads, three heads, a first head 402, a second head 404, a third head 406, a first ink inlet solenoid valve 414, a second ink inlet solenoid valve 416 and a third ink inlet solenoid valve 418 are connected between the ink inlet cavity 410 of the secondary ink tank 408 and the first, second and third heads 402, 404 and 406, a first ink return solenoid valve 420, a second ink return solenoid valve 422, and a third ink return solenoid valve 424 are connected to the ink return chamber 412 of the sub tank 408 and the first head 402, the second head 404, and the third head 406, and the control circuit board 426 is electrically connected with the first ink inlet solenoid valve 414, the second ink inlet solenoid valve 416, the third ink inlet solenoid valve 418, the first ink return solenoid valve 420, the second ink return solenoid valve 422 and the third ink return solenoid valve 424. Ink is pumped from the ink inlet end 428 into the ink inlet chamber 410 of the secondary ink cartridge 408 and is returned to the ink return end 430, i.e., withdrawn from the ink return chamber 412 of the secondary ink cartridge 408. The control circuit board 426 is used to send commands to the ink inlet solenoid valves and the ink return solenoid valves connected to the two ends of the three heads 402, 404, 406 through electronic signals to perform control in different states. For example, the first head 402 of the first head 402, the second head 404 and the third head 406 needs to perform the ink drop maintenance operation independently while the second head 404 and the third head 406 do not need to perform the ink drop maintenance operation, the control circuit 426 can control the second ink return solenoid valve 422, the third ink inlet solenoid valve 418, the second ink return solenoid valve 422 and the third ink return solenoid valve 424 connected to the second head 404 and the third head 406 to be closed simultaneously, and open the first ink inlet solenoid valve 414 and the first ink return solenoid valve 420 connected to the first head 402, so as to complete the operation of the ink drop maintenance of the heads independently. So, be equipped with the solenoid valve of independent work for every shower nozzle, can realize that concatenation formula module is carrying out single shower nozzle and dripping black or supplying ink the time, only control the solenoid valve that this shower nozzle corresponds and open, the solenoid valve that other shower nozzles correspond is closed, has realized the control to single shower nozzle, has saved the consumption of ink. The control circuit board 426 controls the opening and closing of the electromagnetic valve to directly control the pressure on the surface of the spray head, so that the pressure value on the surface of the spray head is ensured to be stable, and on one hand, the surface of the spray head is protected from sucking gas impurities or leaking ink, so that the service life of the spray head is prolonged, and the spliced module spray head is prevented from being frequently replaced; on the other hand, accurate control of the actual ink dropping time is achieved.
In an embodiment of a second aspect of the present invention, a printing press 500 is provided, as shown in fig. 5, the printing press 500 of this embodiment includes an ink supply circulation system 502, and an ink supply control system 504 as in any of the above embodiments.
The printing machine 500 provided by the present invention includes the ink supply control system 504 in any of the above embodiments, so that the overall beneficial effects of the ink supply control system 504 are achieved, and the details are not repeated herein.
In an embodiment of the third aspect of the present invention, an ink supply control method is provided, and fig. 6 shows a flowchart of the ink supply control method according to an embodiment of the present invention:
and step 604, controlling the working states of the ink inlet solenoid valve and the ink return solenoid valve according to different working instructions.
The ink supply control method provided by the invention is used for the ink supply control system in any technical scheme, firstly, the received working instructions are detected, the working instructions are different, the working process of executing the working instructions is different, the actual problems possibly to be solved in different working processes are different, and the pressure in the spray head is required to be different, so that the working states of one or more ink inlet electromagnetic valves and one or more ink return electromagnetic valves are controlled according to different working instructions, and the control of a single spray head and the accurate control of the pressure in the spray head are realized.
In one embodiment of the present invention, preferably, the working state includes at least an open-close state and an open-close time.
In this embodiment, the operating states of the ink inlet solenoid valve and the ink return solenoid valve are controlled, specifically, the open-close states and the open-close times of the ink inlet solenoid valve and the ink return solenoid valve are controlled, because the good control and the maintenance of the ink inlet pressure and the ink return pressure at the two ends of the nozzle are a necessary condition for ensuring the good printing quality of the nozzle, the pressure inside the nozzle is adjusted by opening or closing the ink inlet solenoid valve and the ink return solenoid valve in different times, so that the control of the pressure of the nozzle is really realized, the printing quality is improved, and the ink consumption is saved.
Fig. 7 is a flowchart showing an ink supply control method according to another embodiment of the present invention. Wherein, the method comprises the following steps:
step 704, when the working instruction is an ink drop maintenance starting instruction, acquiring a spray head corresponding to the ink drop maintenance starting instruction;
step 706, controlling the ink inlet solenoid valves and the ink return solenoid valves corresponding to other nozzles except the nozzle corresponding to the ink dropping maintenance opening instruction to be normally closed;
step 708, controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to the nozzle to be closed;
step 712, when the first pressure value reaches a first preset value, controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to the nozzle to open for ink drop maintenance;
step 716, acquiring a second pressure value detected by the first pressure sensor and a third pressure value detected by the second pressure sensor;
step 718, when the second pressure value reaches a second preset value and the third pressure value reaches a third preset value, controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to the spray head to open;
step 720, when the working instruction is an ink supply instruction, acquiring a spray head corresponding to the ink supply instruction;
step 722, controlling ink inlet electromagnetic valves and ink return electromagnetic valves corresponding to other nozzles except the nozzles to be closed;
step 724, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be opened;
and step 728, controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to the nozzle to close.
In an embodiment of the present invention, preferably, the process of controlling the operating states of the ink inlet solenoid valve and the ink return solenoid valve according to different operating instructions specifically includes: when the working instruction is an ink dripping maintenance opening instruction, acquiring a spray head corresponding to the ink dripping maintenance opening instruction; controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be closed; acquiring a first pressure value detected by a first pressure sensor; and when the first pressure value reaches a first preset value, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to open for ink dropping maintenance.
In this embodiment, the process of controlling the working states of at least one ink inlet solenoid valve and at least one ink return solenoid valve according to different working instructions is specifically one of the following cases: when the working instruction is an ink dropping maintenance opening instruction, the ink dropping maintenance instruction is usually only for a certain spray head or certain spray heads, then the spray head corresponding to the ink dropping maintenance opening instruction is obtained, the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head are controlled to be closed briefly, the positive pressure value detected by the first pressure sensor in the secondary ink box of the ink supply circulating system is continuously increased at the moment, the first pressure value detected by the first pressure sensor is obtained, when the positive pressure value detected by the first pressure sensor reaches the first preset value, the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head are controlled to be opened at the moment, then the pressure of the spray head instantly meets the set pressure value, so that the surface of the spray head meets the set pressure value of ink dropping at the moment when the ink inlet electromagnetic valve and the ink return electromagnetic valve are opened, the ink immediately drips from the spray head, and the error between the actual ink dropping time and the preset ink dropping time, accurate control of effective ink drop time is achieved.
In one embodiment of the present invention, preferably, while controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to the ejection head to be closed, the method further includes: and controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to other nozzles except the nozzle corresponding to the ink dropping maintenance opening instruction to be normally closed.
In the embodiment, when an ink dripping maintenance opening instruction is received, the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head are controlled to be closed, and meanwhile, the ink inlet electromagnetic valves and the ink return electromagnetic valves corresponding to other spray heads except the spray head corresponding to the ink dripping maintenance opening instruction are also controlled to be normally closed, so that the pressure of the surfaces of other collision heads except the spray head needing ink dripping maintenance is kept consistent with the pressure of an ink supply circulating system when ink is not dripped, the split type modular component spray head printing machine is controlled independently when only a single spray head or a plurality of spray heads need ink dripping maintenance, ink dripping maintenance of other spray heads not needing ink dripping maintenance is avoided, and the consumption of ink is greatly saved.
In an embodiment of the present invention, preferably, the process of controlling the operating states of the ink inlet solenoid valve and the ink return solenoid valve according to different operating instructions further includes: when the working instruction is an ink dropping maintenance closing instruction, closing an ink inlet electromagnetic valve and an ink return electromagnetic valve corresponding to the spray head; acquiring a second pressure value detected by the first pressure sensor and a third pressure value detected by the second pressure sensor; and when the second pressure value reaches a second preset value and the third pressure value reaches a third preset pressure value, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to open.
In this embodiment, the process of controlling the working states of the ink inlet solenoid valve and the ink return solenoid valve according to different working instructions, wherein one of the conditions is as follows: when the ink dropping maintenance is finished, receiving an ink dropping maintenance closing instruction, because the pressure value of the ink in the secondary ink box can not be recovered to the set pressure value in a short time, the pressure at the nozzle can be greatly fluctuated, and at the moment, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the nozzle to be closed temporarily, so that the initial pressure value of the nozzle is continuously stabilized, and acquiring a second pressure value detected by the first pressure sensor and a third pressure value detected by the second pressure sensor, when the second pressure value reaches the second preset value and the third pressure value reaches the third preset pressure value, the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head are controlled to be opened, so that the pressure value of the surface of the spray head can reach the second preset value instantly, the spray head is prevented from sucking gas impurities due to large pressure fluctuation to cause poor printing effect of the spray head, and the service life of the spray head is prolonged.
In an embodiment of the present invention, preferably, the process of controlling the operating states of the ink inlet solenoid valve and the ink return solenoid valve according to different operating instructions further includes: when the working instruction is an ink supply instruction, acquiring a spray head corresponding to the ink supply instruction; controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to open; and controlling the ink inlet solenoid valve and the ink return solenoid valve corresponding to other nozzles except the nozzles to be closed.
In this embodiment, the process of controlling the operating states of at least one ink inlet solenoid valve and at least one ink return solenoid valve according to different operating commands, wherein one of the conditions is: the working instruction is a normal ink supply instruction, all nozzles are required to be opened to perform ink jet printing under normal conditions, but when only one or a plurality of nozzles need to be controlled to work due to special printing positions and other requirements, then the nozzles corresponding to the ink supply instruction are obtained, the ink inlet electromagnetic valves and the ink return electromagnetic valves corresponding to the nozzles are controlled to be opened, the ink inlet electromagnetic valves and the ink return electromagnetic valves corresponding to other nozzles except the nozzles are controlled to be closed, so that the multiple nozzles are controlled independently, of course, when all the nozzles are required to work, the ink inlet electromagnetic valves and the ink return electromagnetic valves corresponding to all the nozzles are controlled to be opened, so that the pressure in the whole ink supply circulation system is stably circulated, and the normal ink supply printing of the ink supply circulation system of the printer is realized.
In an embodiment of the present invention, preferably, the process of controlling the operating states of the ink inlet solenoid valve and the ink return solenoid valve according to different operating instructions further includes: when the working instruction is an ink supply stopping instruction, acquiring a spray head corresponding to the ink supply stopping instruction; and controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be closed.
In this embodiment, the process of controlling the operating states of the at least one ink inlet solenoid valve and the at least one ink return solenoid valve according to different operating instructions is that the operating instruction is an ink supply stopping instruction, and because the temperature of ink in an ink supply circulating system can be rapidly reduced, the air in the ink inlet cavity and the air in the ink return cavity of the secondary ink cartridge expand with heat and contract with cold, so that negative pressure is increased, and a large amount of air and impurities are sucked into the nozzles.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An ink supply control system is used for a circulating ink supply system of a printing machine, and is characterized in that the circulating ink supply system comprises at least one spray head, a secondary ink box consisting of an ink inlet cavity and an ink return cavity which are isolated from each other, a first pressure sensor arranged in the ink inlet cavity, and a second pressure sensor arranged in the ink return cavity, and the ink supply control system comprises:
the ink inlet electromagnetic valve is arranged between the ink inlet cavity and the spray head;
at least one ink return solenoid valve, wherein the ink return solenoid valve is arranged between the ink return cavity and the spray head;
the control device is electrically connected with the ink inlet electromagnetic valve and the ink return electromagnetic valve and is used for controlling the working states of the ink inlet electromagnetic valve and the ink return electromagnetic valve according to different working instructions;
the working state at least comprises an opening and closing state and opening and closing time.
2. A printing press, comprising: an ink supply circulation system; and
an ink supply control system as claimed in claim 1, for controlling the ink supply circulation system.
3. An ink supply control method for controlling an ink supply control system according to claim 1, comprising:
detecting a received work order;
controlling the working states of the ink inlet solenoid valve and the ink return solenoid valve according to different working instructions;
the working state at least comprises an opening and closing state and opening and closing time.
4. The ink supply control method according to claim 3, wherein the process of controlling the operating states of the ink inlet solenoid valve and the ink return solenoid valve according to different operating instructions specifically comprises:
when the working instruction is an ink dripping maintenance opening instruction, acquiring a spray head corresponding to the ink dripping maintenance opening instruction;
controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be closed;
acquiring a first pressure value detected by the first pressure sensor;
and when the first pressure value reaches a first preset value, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to open so as to perform ink dropping maintenance.
5. The ink supply control method according to claim 4, wherein, while controlling the ink supply solenoid valve and the ink return solenoid valve corresponding to the head to be closed, the method further comprises:
and controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to other nozzles except the nozzle corresponding to the ink dropping maintenance opening instruction to be normally closed.
6. The ink supply control method according to claim 3, wherein the process of controlling the operating states of the ink supply solenoid valve and the ink return solenoid valve according to different operating instructions further includes:
when the working instruction is an ink dropping maintenance closing instruction, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be closed;
acquiring a second pressure value detected by the first pressure sensor and a third pressure value detected by the second pressure sensor;
and when the second pressure value reaches a second preset value and the third pressure value reaches a third preset value, controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be opened.
7. The ink supply control method according to claim 3, wherein the process of controlling the operating states of the ink supply solenoid valve and the ink return solenoid valve according to different operating instructions further includes:
when the working instruction is an ink supply instruction, acquiring a spray head corresponding to the ink supply instruction;
controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be opened; and
and controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to other nozzles except the nozzles to be closed.
8. The ink supply control method according to claim 3, wherein the process of controlling the operating states of the ink supply solenoid valve and the ink return solenoid valve according to different operating instructions further includes:
when the working instruction is an ink supply stopping instruction, acquiring a spray head corresponding to the ink supply stopping instruction;
and controlling the ink inlet electromagnetic valve and the ink return electromagnetic valve corresponding to the spray head to be closed.
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| CN111746124A (en) * | 2020-06-10 | 2020-10-09 | 深圳圣德京粤科技有限公司 | Circulating ink supply system |
| CN113211978B (en) * | 2021-04-21 | 2022-12-16 | 华南理工大学 | Full-automatic anti-blocking ink-jet printing system and method |
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| CN102101386A (en) * | 2009-12-16 | 2011-06-22 | 北大方正集团有限公司 | Circulating ink supply device |
| CN201712257U (en) * | 2010-05-07 | 2011-01-19 | 童舟 | Stepless automatic circulating ink supply device of digital spraying printer |
| CN102673164B (en) * | 2012-06-08 | 2015-02-04 | 潍坊东航印刷科技股份有限公司 | Circulating ink supplying system |
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Effective date of registration: 20230613 Address after: 3007, Hengqin international financial center building, No. 58, Huajin street, Hengqin new area, Zhuhai, Guangdong 519031 Patentee after: New founder holdings development Co.,Ltd. Patentee after: BEIJING FOUNDER ELECTRONICS Co.,Ltd. Address before: 100871, Beijing, Haidian District Cheng Fu Road 298, founder building, 9 floor Patentee before: PEKING UNIVERSITY FOUNDER GROUP Co.,Ltd. Patentee before: BEIJING FOUNDER ELECTRONICS Co.,Ltd. |