CN106827821B - A kind of totally-enclosed double negative-pressure cyclic ink feeding systems of Digital ink-jet printer - Google Patents
A kind of totally-enclosed double negative-pressure cyclic ink feeding systems of Digital ink-jet printer Download PDFInfo
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- CN106827821B CN106827821B CN201710203328.7A CN201710203328A CN106827821B CN 106827821 B CN106827821 B CN 106827821B CN 201710203328 A CN201710203328 A CN 201710203328A CN 106827821 B CN106827821 B CN 106827821B
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- ink
- black
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- print cartridge
- liquid level
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
- B41J2/17503—Ink cartridges
- B41J2/17556—Means for regulating the pressure in the cartridge
-
- 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
- B41J2002/1853—Ink-collectors; Ink-catchers ink collectors for continuous Inkjet printers, e.g. gutters, mist suction means
Abstract
The invention discloses a kind of totally-enclosed double negative-pressure cyclic ink feeding systems of Digital ink-jet printer, including black bucket, black device is returned to the negative pressure ink supply device and negative pressure of print head conveying ink, and centralized control negative pressure ink supply device and negative pressure return the controller that black device carries out cyclic ink supply, memory is connected on controller, negative pressure ink supply device includes supplying ink box, ink supply air pressure adjustment unit and ink supply liquid level adjust unit, negative pressure returns black device and includes back print cartridge, it returns black air pressure adjustment unit and goes back to black liquid position and adjust unit, print head is double negative pressure print heads, the vacuum degree of the ink-outtake end of double negative pressure print heads is higher than the vacuum degree at ink feed end, black bucket is connected to supplying ink box and time print cartridge respectively, supplying ink box and time print cartridge are gas-liquid buffer-type closing print cartridge.The present invention controls ink pressure in print cartridge by the way of air pressure adjustment liquid level and by way of double pump difference in flow, and the recirculation ink amount of print head is effectively smoothly controlled by the vacuum degree difference at print head both ends, and dynamic print is adaptable.
Description
Technical field
The invention belongs to printing machine ink supply technical fields, and in particular to a kind of totally-enclosed double negative pressure of Digital ink-jet printer
Cyclic ink supply system.
Background technique
In recent years, with the rapid development of Digital ink jet printing technology, print head technology has also obtained great promotion, has gushed
Revealed large quantities of technical grade digital ink-jet print heads, typical printhead is mostly open-type positive pressure ink supply, mostly use siphonage or
Differential pressure method realizes black pressure, and the print head utilization rate of negative pressure ink supply is fewer, and the printing for the negative pressure ink supply being used to mostly
Head also mostly uses the negative pressure gas bag method of vacuum proportional valve to realize black pressure.These ink supply modes can make on small-sized spray drawing machine
With but not just being available on large scale industry grade high-speed digital ink-jet printer, it may appear that ink supply amount is insufficient, ink pressure is unstable and
The problems such as print head ink bleed.Therefore, it is fast nowadays to lack a kind of simple structure and reasonable design, dynamic response, Neng Gouwen
Totally-enclosed double negative-pressure cyclic ink feeding systems of the Digital ink-jet printer of fixed, reliable ink supply, pass through Liquid level and pressure control
Ingenious combination overcomes influence between the two, controls versatile and flexible, suitable great Mo amount flying print.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of digital ink-jet
Totally-enclosed double negative-pressure cyclic ink feeding systems of printing machine, it is novel in design reasonable, by the way of air pressure adjustment liquid level and pass through
The mode of double pump difference in flow controls ink pressure in print cartridge, and by the vacuum degree difference at print head both ends, effectively smoothly control is printed
The recirculation ink amount of head, dynamic print is adaptable, convenient for promoting the use of.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of Digital ink-jet printer it is totally-enclosed
Double negative-pressure cyclic ink feeding systems, it is characterised in that: including black bucket, for the negative pressure ink supply device and use to print head conveying ink
Black device is returned in the negative pressure of recycling print head excess ink, and for negative pressure ink supply device and the negative pressure described in centralized control
The controller that black device carries out cyclic ink supply is returned, is connected on the controller for storing the negative pressure ink supply device vacuum degree
Threshold value and the negative pressure return the memory of black device vacuum level threshold, and the negative pressure ink supply device includes supplying ink box, for adjusting
The ink supply air pressure adjustment unit of air pressure in supplying ink box and ink supply liquid level for adjusting liquid level in supplying ink box adjust unit, described negative
It pushes back black device and includes back print cartridge, time black air pressure adjustment unit for adjusting back air pressure in ink cartridge and for adjusting back in print cartridge
The black liquid position of returning of liquid level adjusts unit, and the ink feed end of print head is connected to supplying ink box, and the ink-outtake end of print head is connected to print cartridge is returned,
The print head is double negative pressure print heads, and the vacuum degree of the ink-outtake end of double negative pressure print heads is higher than the vacuum degree at ink feed end,
Black bucket by the Y type ink inlet tube with an input terminal and two output ends respectively with the ink feed end of supplying ink box and time print cartridge into
Mo Duan connection installs promising supplying ink box on the intake line of the Y type ink inlet tube and returns the dispenser pump that print cartridge adds ink, supplying ink box and
Returning print cartridge is gas-liquid buffer-type closing print cartridge.
Totally-enclosed double negative-pressure cyclic ink feeding systems of above-mentioned a kind of Digital ink-jet printer, it is characterised in that: described double
The vacuum degree of the ink-outtake end of negative pressure print head is -66mbar~-64mbar, the vacuum degree at the ink feed end of double negative pressure print heads
For -36mbar~-34mbar.
A kind of totally-enclosed double negative-pressure cyclic ink feeding systems of above-mentioned Digital ink-jet printer, it is characterised in that: the confession
Black liquid position adjust unit include ink supply pressure regulating pump and be mounted on supplying ink box for acquire ink level in supplying ink box for black liquid
Level sensor, ink supply pressure regulating pump install the ink supply ink tube road between supplying ink box and black bucket, the signal of ink supply liquid level sensor
The connection of the input terminal of output end and controller, the signal input part of ink supply pressure regulating pump and the output end of controller connect.
Totally-enclosed double negative-pressure cyclic ink feeding systems of above-mentioned a kind of Digital ink-jet printer, it is characterised in that: described time
Black liquid position adjusts unit and is back black pressure regulating pump and is mounted on back on print cartridge for acquiring go back to go back to black liquid position of ink level in print cartridge
Sensor, time black pressure regulating pump are installed back and return black ink tube on the road between print cartridge and black bucket, and the signal for returning black liquid level sensor is defeated
The output end of the connection of the input terminal of outlet and controller, the signal input part and controller that return black pressure regulating pump connects.
A kind of totally-enclosed double negative-pressure cyclic ink feeding systems of above-mentioned Digital ink-jet printer, it is characterised in that: the confession
Black air pressure adjustment unit includes being mounted on supplying ink box for acquiring ink supply barometer, the control high-pressure air source of air pressure in supplying ink box
Ink supply into supplying ink box presses black solenoid valve and control low-pressure gas source to enter the ink supply blotting solenoid valve of supplying ink box, the high pressure gas
Source or the low-pressure gas source be supplying ink box gas supply pipeline on ink supply throttle valve is installed, the barometrical signal output end of ink supply with
The input terminal of controller connects, ink supply press black solenoid valve input terminal and ink supply blotting solenoid valve input terminal with controller
Output end connection.
Totally-enclosed double negative-pressure cyclic ink feeding systems of above-mentioned a kind of Digital ink-jet printer, it is characterised in that: described time
Black air pressure adjustment unit includes being mounted on back on print cartridge for acquiring back time black barometer, the control high-pressure air source of air pressure in ink cartridge
The black time black blotting solenoid valve for pressing black solenoid valve and control low-pressure gas source to enter back print cartridge, the high pressure gas are returned into time print cartridge
Source or the low-pressure gas source be back to be equipped with back black throttle valve on the pipeline of print cartridge gas supply, return the barometrical signal output end of ink and
The input terminal of controller connects, return ink press the input terminal of black solenoid valve and return the input terminal of ink blotting solenoid valve with controller
Output end connection.
A kind of totally-enclosed double negative-pressure cyclic ink feeding systems of above-mentioned Digital ink-jet printer, it is characterised in that: the height
The air pressure of pressurized air source is 30kPa~40kPa, and the air pressure of the low-pressure gas source is -40kPa~-30kPa.
Totally-enclosed double negative-pressure cyclic ink feeding systems of above-mentioned a kind of Digital ink-jet printer, it is characterised in that: described to add
Note pump is quantitative diaphragm pump, and the quantitative diaphragm pump is connect with 24V DC power supply.
A kind of totally-enclosed double negative-pressure cyclic ink feeding systems of above-mentioned Digital ink-jet printer, it is characterised in that: the Y type
Be located at the position between black bucket and dispenser pump on the intake line of ink inlet tube and filter be installed, in the Y type ink inlet tube with
Degassing module is installed on the output pipe of supplying ink box connection.
A kind of totally-enclosed double negative-pressure cyclic ink feeding systems of above-mentioned Digital ink-jet printer, it is characterised in that: the control
Device processed is multichannel PID adjusting apparatus or PLC control module.
Compared with the prior art, the present invention has the following advantages:
1, the present invention is by returning double negative-pressure cyclic ink feeding systems that black device forms to double by negative pressure ink supply device and negative pressure
The vacuum degree at negative pressure print head both ends is adjusted, and guarantees that the vacuum degree of the ink-outtake end of double negative pressure print heads is higher than the true of ink feed end
Reciprocal of duty cycle effectively adsorbs the ink in double negative pressure print heads, and ink pressure is stablized, and ink amount is sufficient, realizes that ink-jet is smooth, prevents from falling the effect of ink, seep
Ink, using effect is good, convenient for promoting the use of.
2, the mode that negative pressure ink supply device of the invention and negative pressure return that black device is all made of air pressure adjustment liquid level controls respectively
In print cartridge ink pressure, by air pressure adjustment unit by vacuum degree control in print cartridge in a certain range, unit is adjusted by liquid level
Liquid level in print cartridge is controlled, when liquid level is higher in print cartridge, increases the discharge capacity of print cartridge ink, while passing through extraneous tonifying Qi
Mode control vacuum degree in print cartridge；When liquid level is lower in print cartridge, reduce the discharge capacity of print cartridge ink, while passing through the external world
The mode of pumping controls vacuum degree in print cartridge, and dynamic modulability is strong, and precision is high, and using effect is good.
3, the present invention is novel in design rationally, negative pressure ink supply device is controlled using controller and negative pressure return black device, it can be achieved that
Black device centralized control is returned to negative pressure ink supply device and negative pressure, can also realize and the only of black device is returned to negative pressure ink supply device or negative pressure
Vertical control, meanwhile, it is equally applicable to positive pressure cyclic ink supply, complete function, convenient for promoting the use of.
In conclusion the present invention is novel in design rationally, by the way of air pressure adjustment liquid level and pass through double pump difference in flow
Mode control in print cartridge ink pressure, the recirculation ink of print head is effectively smoothly controlled by the vacuum degree difference at print head both ends
Amount, dynamic print is adaptable, convenient for promoting the use of.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is schematic block circuit diagram of the invention.
Description of symbols:
1-black bucket；2-print heads；3-supplying ink boxes；
4-return print cartridge；5-ink supply barometers；6-return black barometer；
7-dispenser pumps；8-degassing modules；9-return black pressure regulating pump；
10-filters；11-ink supply pressure regulating pumps；12-ink supply blotting solenoid valves；
Black solenoid valve is pressed in 13-ink supply；14-, which return ink, presses black solenoid valve；15-return black blotting solenoid valve；
16-return black barometer；17-return black throttle valve；18-ink supply liquid level sensors；
19-return black liquid level sensor；20-controllers；21-memories.
Specific embodiment
As depicted in figs. 1 and 2, the present invention include black bucket 1, for print head 2 convey ink negative pressure ink supply device and
Negative pressure for recycling 2 excess ink of print head returns black device, and for negative pressure ink supply device described in centralized control and described
Negative pressure returns the controller 20 that black device carries out cyclic ink supply, is connected on the controller 20 for storing the negative pressure ink supply dress
It sets vacuum level threshold and the negative pressure returns the memory 21 of black device vacuum level threshold, the negative pressure ink supply device includes supplying ink box
3, the ink supply liquid level tune for adjusting the ink supply air pressure adjustment unit of air pressure in supplying ink box 3 and for adjusting liquid level in supplying ink box 3
Save unit, the negative pressure return black device include back print cartridge 4, for adjusts back in print cartridge 4 time ink air pressure adjustment unit of air pressure and
Black liquid position of returning for adjusting back liquid level in print cartridge 4 adjusts unit, and the ink feed end of print head 2 is connected to supplying ink box 3, print head 2
Ink-outtake end be connected to print cartridge 4 is returned, the print head 2 is pair negative pressure print heads, the ink-outtake end of double negative pressure print heads it is true
Reciprocal of duty cycle is higher than the vacuum degree at ink feed end, black bucket 1 by the Y type ink inlet tube with an input terminal and two output ends respectively with confession
The ink feed end of print cartridge 3 is connected to the ink feed end for returning print cartridge 4, and promising 3 He of supplying ink box is installed on the intake line of the Y type ink inlet tube
The dispenser pump 7 of print cartridge 4 plus ink is returned, supplying ink box 3 and time print cartridge 4 are gas-liquid buffer-type closing print cartridge.
On the one hand the setting of black bucket 1 is that ink is conveyed for negative pressure ink supply device, another party's meeting is that recycling print head 2 uses
Endless ink realizes recycling for ink supply, reduces the waste of ink, black bucket 1 using open black bucket, internal pressure with
Atmosphere communicates, and the ink-feeding device of the print head 2 of Digital ink-jet printer uses negative pressure ink supply device, and Digital ink-jet printer is beaten
The black device that returns for printing head 2 returns black device using negative pressure, is to avoid print head 2 in ink-jet to guarantee that ink is adsorbed in real time
During caused due to ink self weight excessive with ink, cause the waste of resource, it is often more important that print head 2 is avoided to exist
It is fallen the effect of ink during ink-jet, ink bleed, causes the failure of printing, the setting of controller 20 is to realize that full automatic control is double negative
Press cyclic ink supply system.
In actual use, for print head 2 using double negative pressure print heads, negative pressure is subatmospheric pressure, the pressure of negative pressure
For usual more useful vacuum degrees as measurement standard, vacuum degree refers to the gas rarefied content under vacuum state, the dilute book of gas
Degree usually indicates with " vacuum degree high " and " vacuum degree is low ", vacuum degree height expression vacuum degree " good ", vacuum degree it is absolute
Value is big；The low expression vacuum degree " poor " of vacuum degree, the absolute value of vacuum degree are small；The vacuum degree of the ink-outtake end of double negative pressure print heads is high
Vacuum degree in ink feed end, in order to a positive pressure is formed in the ink-outtake end of double negative pressure print heads and ink feed end, it is real
The flowing of existing ink, double normal ink jet printings of negative pressure print head, excess ink can be smoothly after guaranteeing double negative pressure print head ink-jets
Flow direction return print cartridge 4.
The ink feed end of print head 2 is connected to supplying ink box 3, and the ink-outtake end of print head 2 is connected to print cartridge 4 is returned, and ensure that printing
First 2 ink feed end is equal with the vacuum degree of supplying ink box 3, and the ink-outtake end of print head 2 is equal with the vacuum degree of print cartridge 4 is returned, and controls respectively
The vacuum degree of supplying ink box 3 processed and the vacuum degree for returning print cartridge 4 can determine the vacuum degree at 2 both ends of print head, and then can obtain print head 2
The vacuum degree at both ends is poor, since the vacuum degree of the ink-outtake end of double negative pressure print heads is higher than the vacuum degree at ink feed end, return print cartridge
4 vacuum degree is higher than the vacuum degree of supplying ink box 3, and the setting of memory 21 in order to store supplying ink box 3 in negative pressure ink supply device in advance
The vacuum level threshold to be kept and the negative pressure return in black device and return the vacuum level threshold to be kept of print cartridge 4, real for controller 20
When compare, and then black device returned to negative pressure ink supply device and negative pressure realize and accurately adjust control.
Promising supplying ink box 3 is installed on the intake line of the Y type ink inlet tube and returns the dispenser pump 7 of print cartridge 4 plus ink, this implementation
In example, preferred dispenser pump 7 is connect using quantitative diaphragm pump, the quantitative diaphragm pump with 24V DC power supply, and quantitative diaphragm pump connects
It directly starts to work after connecing 24V DC power supply, is controlled without controller 20, simplify the control of ink feeding system, it is easy to operate.
It is in order to by way of air pressure adjustment liquid level that supplying ink box 3 and time print cartridge 4, which are all made of gas-liquid buffer-type closing print cartridge,
Ink pressure in respective print cartridge is controlled, the ink supply for adjusting air pressure in supplying ink box 3 is set in the negative pressure ink supply device where supplying ink box 3
Air pressure adjustment unit is to adjust unit in order to be used to air pressure in feedback supplying ink box 3 in real time convenient for ink supply liquid level and be accurately controlled
Liquid level in supplying ink box 3；Negative pressure where returning print cartridge 4 returns that black device is equivalent to be provided with for adjusting back air pressure in print cartridge 4
The black air pressure adjustment unit that returns feed back to air pressure in print cartridge 4 in real time, adjusting unit convenient for going back to black liquid position is accurately controlled Hui Mo
Liquid level in box 4 realizes that high dynamic adjusts the vacuum degree in two print cartridges, high sensitivity.
In the present embodiment, the vacuum degree of the ink-outtake end of double negative pressure print heads is -66mbar~-64mbar, described double
The vacuum degree at the ink feed end of negative pressure print head is -36mbar~-34mbar.
The vacuum degree of the ink-outtake end of double negative pressure print heads is -66mbar~-64mbar, and also referred to as double negative pressure are beaten
The vacuum degree for printing the ink-outtake end of head is -65mbar ± 1mbar, it is therefore an objective to by the vacuum degree control of the ink-outtake end of double negative pressure print heads
In -65mbar, precision is ± 1mbar, is controlled accurate high；Similarly, the vacuum degree at the ink feed end of double negative pressure print heads be-
36mbar~-34mbar, the vacuum degree at the ink feed end of also referred to as double negative pressure print heads are -35mbar ± 1mbar, be can be obtained
The vacuum degree difference at double negative pressure print heads both ends is 28mbar~32mbar.
In the present embodiment, it includes that ink supply pressure regulating pump 11 and being mounted on supplying ink box 3 is used for that the ink supply liquid level, which adjusts unit,
The ink supply liquid level sensor 18 of ink level in supplying ink box 3 is acquired, ink supply pressure regulating pump 11 is installed between supplying ink box 3 and black bucket 1
Ink supply ink tube road, the signal output end of ink supply liquid level sensor 18 are connect with the input terminal of controller 20, ink supply pressure regulating pump
11 signal input part is connect with the output end of controller 20.
The setting of ink supply liquid level sensor 18 is to acquire ink level in supplying ink box 3 in real time, and supplying ink box 3 is slow for gas-liquid
Stamp closes print cartridge, is easy to implement in supplying ink box 3 gas atmosphere on ink liquid and ink liquid and coordinates to adjust, by for black liquid
The data that level sensor 18 acquires feed back to controller 20 in real time, when deviation occurs in the liquid level that ink supply liquid level sensor 18 acquires
When, controller 20 adjusts ink regurgitant volume quickly through ink supply pressure regulating pump 11, guarantees level stability.
In the present embodiment, described time black liquid position adjusts unit and is back black pressure regulating pump 9 and is mounted on back on print cartridge 4 for acquiring
Time black liquid level sensor 19 for returning ink level in print cartridge 4 returns the ink that returns that black pressure regulating pump 9 is installed back between print cartridge 4 and black bucket 1 and goes out
On black pipeline, the signal output end for returning black liquid level sensor 19 is connect with the input terminal of controller 20, returns the signal of black pressure regulating pump 9
Input terminal is connect with the output end of controller 20.
The setting for returning black liquid level sensor 19 is that it is slow for gas-liquid to return print cartridge 4 in order to acquire back ink level in print cartridge 4 in real time
Stamp closes print cartridge, is easy to implement back in print cartridge 4 gas atmosphere on ink liquid and ink liquid and coordinates to adjust, passes through time black liquid
The data that level sensor 19 acquires feed back to controller 20 in real time, deviation occur when returning the liquid level that black liquid level sensor 19 acquires
When, controller 20 adjusts ink regurgitant volume quickly through black pressure regulating pump 9 is returned, and guarantees level stability.
Return black pressure regulating pump 9 and ink supply pressure regulating pump 11 be preferably all made of stepless variable-displacement diaphragm pump, dispenser pump 7 using it is quantitative every
Membrane pump, in actual use, quantitative diaphragm pump is delivered to 3 He of supplying ink box for what the ink extracted out from black bucket 1 was divided into two equivalent
It returns in print cartridge 4, fixed supplying ink box 3 and the input quantity for returning print cartridge 4, ink supply liquid level sensor 18 detect that liquid level becomes in supplying ink box 3
When low, 11 stepless variable of ink supply pressure regulating pump adjusts the regurgitant volume of ink, reduces the regurgitant volume of ink；Ink supply liquid level sensor 18
When detecting that liquid level is got higher in supplying ink box 3,11 stepless variable of ink supply pressure regulating pump adjusts the regurgitant volume of ink, makes the regurgitant volume of ink
Increase, adjusts liquid level in supplying ink box 3 convenient for quickly accurate；It returns black liquid level sensor 19 and detects back that liquid level is lower in print cartridge 4
When, the regurgitant volume that black 9 stepless variable of pressure regulating pump adjusts ink is returned, the regurgitant volume of ink is reduced；Black liquid level sensor 19 is returned to examine
When measuring back that liquid level is got higher in print cartridge 4, the regurgitant volume that black 9 stepless variable of pressure regulating pump adjusts ink is returned, the regurgitant volume of ink is increased
Greatly, liquid level in print cartridge 4 is adjusted back convenient for quickly accurate；Supplying ink box 3 and the adjusting for returning ink level in print cartridge 4 are adjusted independently of each other
Section, it is unaffected each other, reduce the transmitting of feedback signal, saves the control time.
In the present embodiment, the ink supply air pressure adjustment unit includes being mounted on supplying ink box 3 for acquiring gas in supplying ink box 3
The ink supply that the ink supply barometer 5 of pressure, control high-pressure air source enter supplying ink box 3 presses black solenoid valve 13 and control low-pressure gas source to enter confession
It is equipped on the pipeline that the ink supply blotting solenoid valve 12 of print cartridge 3, the high-pressure air source or the low-pressure gas source supply for supplying ink box 3
The signal output end of ink supply throttle valve 16, ink supply barometer 5 is connect with the input terminal of controller 20, and black solenoid valve 13 is pressed in ink supply
The input terminal of input terminal and ink supply blotting solenoid valve 12 is connect with the output end of controller 20.
The setting of ink supply barometer 5 is transmitted to controller 20 in order to acquire air pressure in supplying ink box 3, by air pressure in supplying ink box 3,
When the data that ink supply barometer 5 acquires have deviation, the liquid level in ink-supplying balanced box 3 in such a way that air pressure auxiliary adjustment is hydraulic,
The flow and dispenser pump 7 for controlling ink supply pressure regulating pump 11 carry out the difference of flow to form the negative pressure of supplying ink box 3；Ink supply is set and presses ink
The purpose of solenoid valve 13 is, will when the ink supply liquid level sensor 18 in supplying ink box 3, which detects that liquid level is excessively high, to be needed to reduce liquid level
In clean high-pressure air source injection supplying ink box 3, decline liquid level in supplying ink box 3；The purpose that ink supply blotting solenoid valve 12 is arranged is,
When the ink supply liquid level sensor 18 in supplying ink box 3, which detects that liquid level is too low, to be needed to improve liquid level, clean low-pressure gas source is infused
Enter in supplying ink box 3, increase liquid level in supplying ink box 3, the setting of ink supply throttle valve 16 is to control the high-pressure air source or institute
State the flow that low-pressure gas source flows through.
In the present embodiment, described time black air pressure adjustment unit includes being mounted on back on print cartridge 4 for acquiring back gas in print cartridge 4
Time black barometer 6 of pressure, control high-pressure air source enter back time black solenoid valve 14 of ink pressure of print cartridge 4 and control low-pressure gas source enters back
Print cartridge 4 returns black blotting solenoid valve 15, and the high-pressure air source or the low-pressure gas source are back to be equipped on the pipeline of the gas supply of print cartridge 4
Black throttle valve 17 is returned, the signal output end for returning black barometer 6 is connect with the input terminal of controller 20, is returned ink and is pressed black solenoid valve 14
Input terminal and the input terminal for returning black blotting solenoid valve 15 are connect with the output end of controller 20.
The setting of black barometer 6 is returned in order to acquire back air pressure in print cartridge 4, air pressure in print cartridge 4 will be returned and be transmitted to controller 20,
When returning the data that black barometer 6 acquires has deviation, liquid level in print cartridge 4 is balanced back in such a way that air pressure auxiliary adjustment is hydraulic,
The flow and dispenser pump 7 for controlling back black pressure regulating pump 9 carry out the difference of flow to form back the negative pressure of print cartridge 4；Ink pressure ink is set back
The purpose of solenoid valve 14 is, when time black liquid level sensor 19 returned in print cartridge 4, which detects that liquid level is excessively high, to be needed to reduce liquid level, by
Clean high-pressure air source is injected back in print cartridge 4, and liquid level in print cartridge 4 is declined；The purpose that black blotting solenoid valve 15 is arranged back is,
When time black liquid level sensor 19 returned in print cartridge 4, which detects that liquid level is too low, to be needed to improve liquid level, clean low-pressure gas source is infused
Enter back in print cartridge 4, increase liquid level in print cartridge 4, the setting for returning black throttle valve 17 is to control the high-pressure air source or institute
State the flow that low-pressure gas source flows through.
In the present embodiment, the air pressure of the high-pressure air source is 30kPa~40kPa, the air pressure of the low-pressure gas source is-
40kPa~-30kPa.
In actual use, the black solenoid valve 13 is pressed to be by ambient pressure by being separately turned on ink supply blotting solenoid valve 12 or ink supply
± 30kPa~± 40kPa clean air source introduces supplying ink box 3, plays promotion to the liquid level in supplying ink box 3 or reduced adjusting is made
With.
It is located at the position between black bucket 1 and dispenser pump 7 in the present embodiment, on the intake line of the Y type ink inlet tube and pacifies
Equipped with filter 10, degassing module 8 is installed on the output pipe that connect in the Y type ink inlet tube with supplying ink box 3.
The setting of filter 10 is to guarantee the ink supply quality of print cartridge, institute in order to which the filtering foreign that will be input to print cartridge is clean
It states and degassing module 8 is installed on the output pipe connecting in Y type ink inlet tube with supplying ink box 3, the setting of degassing module 8 is to incite somebody to action
Into the micro-air removal in the ink of supplying ink box 3, it is poor in order to provide a vacuum degree to supplying ink box 3 to return the setting of print cartridge 4
It is worth comparison other, decontamination need not be carried out into the ink returned in print cartridge 4, reduce the usage quantity of degassing module 8.
In the present embodiment, the controller 20 is multichannel PID adjusting apparatus or PLC control module.
In actual use, controller 20 can be used multichannel PID adjusting apparatus and return ink dress to negative pressure ink supply device and negative pressure respectively
It sets and carries out PID adjusting, realize that negative pressure ink supply device and negative pressure return the independent control of black device, PLC control can also be used in controller 20
Molding block returns black device to negative pressure ink supply device and negative pressure and regulates and controls simultaneously, realizes unified management.
Ink supply control method of the invention: ink injects supplying ink box 3 by black bucket 1 while ink injects back print cartridge 4 by black bucket 1
It is two level-one ink-feed channels of ink feeding system, ink is flowed into print head 2 by supplying ink box 3 and flowed into from the ink-outtake end of print head 2
The second level ink-feed channel that print cartridge 4 is ink feeding system is returned, ink supply is carried out to print head 2 by the way of two-stage ink supply, respectively to confession
Print cartridge 3 and the ink supply level sensing for returning the progress negative pressure adjusting of print cartridge 4, and being arranged in memory 21 on installation supplying ink box 3 in advance
The threshold value of device 18 and ink supply barometer 5 and the threshold for returning black liquid level sensor 19 and returning black barometer 6 on print cartridge 4 is installed back
Value；
Using the ink feed amount of dispenser pump 7 fixed supplying ink box 3 and time print cartridge 4, using ink supply pressure regulating pump 11 and black pressure regulating pump 9 is returned
Change supplying ink box 3 and return the amount out of ink of print cartridge 4, and then adjusts supplying ink box 3 and return the ink amount balance of print cartridge 4；When in supplying ink box 3
When the data that ink supply liquid level sensor 18 detects deviate the preset threshold of ink supply liquid level sensor 18 and detect that liquid level is excessively high, need
Liquid level is reduced, presses black solenoid valve 13 to inject clean high-pressure air source into supplying ink box 3 by opening ink supply, due to dispenser pump 7
Constant to 3 ink supply amount of supplying ink box, control ink supply pressure regulating pump 11 increases the discharge capacity of ink, declines liquid level；Confession in supplying ink box 3
Black liquid level sensor 18 detects that liquid level is too low, when needing to improve liquid level, by opening ink supply blotting solenoid valve 12 using outside
The gas bleeding from supplying ink box 3 of clean low-pressure gas source, control ink supply pressure regulating pump 11 reduce the discharge capacity of ink, increase liquid level；
When the preset threshold returned the data that black liquid level sensor 19 detects and deviate back black liquid level sensor 19 returned in print cartridge 4
And when detecting that liquid level is excessively high, need to reduce liquid level, by open back ink press black solenoid valve 14 to return in print cartridge 4 inject it is clean
High-pressure air source controls back the discharge capacity that black pressure regulating pump 9 increases ink, makes liquid level since dispenser pump 7 is constant to time 4 ink supply amount of print cartridge
Decline；When the black liquid level sensor 19 that returns returned in print cartridge 4 detects that liquid level is too low, when needing to improve liquid level, by opening Hui Mo
Blotting solenoid valve 15 controls back black pressure regulating pump 9 and reduces ink using low-pressure gas source gas bleeding from supplying ink box 3 of exterior clean
Discharge capacity, increase liquid level；
Dynamic keeps being higher than the printing being connected to supplying ink box 3 with the vacuum degree for the ink-outtake end for returning the print head 2 that print cartridge 4 is connected to
The vacuum degree at first 2 ink feed end；
It is filtered in addition, setting filter 10 enters supplying ink box 3 with 8 pairs of module of degassing with the ink for returning print cartridge 4, realization
The stable operation of totally-enclosed double negative-pressure cyclic ink feeding systems.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification to the above embodiments, change and equivalent structural changes, still fall within skill of the present invention
In the protection scope of art scheme.
Claims (6)
1. a kind of totally-enclosed double negative-pressure cyclic ink feeding systems of Digital ink-jet printer, it is characterised in that: including black bucket (1), use
Black device is returned in the negative pressure ink supply device to print head (2) conveying ink and the negative pressure for recycling print head (2) excess ink,
And the controller (20) that black device carries out cyclic ink supply, institute are gone back to for negative pressure ink supply device described in centralized control and the negative pressure
It states to be connected on controller (20) and returns black device vacuum for storing the negative pressure ink supply device vacuum level threshold and the negative pressure
The memory (21) of threshold value is spent, the negative pressure ink supply device includes supplying ink box (3), the confession for adjusting supplying ink box (3) interior air pressure
Black air pressure adjustment unit and ink supply liquid level for adjusting supplying ink box (3) interior liquid level adjust unit, and the negative pressure returns black device packet
Include back print cartridge (4), time black air pressure adjustment unit for adjusting back print cartridge (4) interior air pressure and for adjusting back print cartridge (4) interior liquid
The black liquid position of returning of position adjusts unit, and the ink feed end of print head (2) is connected to supplying ink box (3), the ink-outtake end and Hui Mo of print head (2)
Box (4) connection, the print head (2) are double negative pressure print heads, the vacuum degree of the ink-outtake end of double negative pressure print heads be higher than into
The vacuum degree of Mo Duan, black bucket (1) by the Y type ink inlet tube with an input terminal and two output ends respectively with supplying ink box (3)
Ink feed end with return print cartridge (4) ink feed end be connected to, installed on the intake line of the Y type ink inlet tube promising supplying ink box (3) and
The dispenser pump (7) of print cartridge (4) plus ink is returned, supplying ink box (3) and time print cartridge (4) are gas-liquid buffer-type closing print cartridge；
The ink supply air pressure adjustment unit includes being mounted on supplying ink box (3) for acquiring the ink supply gas of supplying ink box (3) interior air pressure
The ink supply that pressure meter (5), control high-pressure air source enter supplying ink box (3) presses black solenoid valve (13) and control low-pressure gas source to enter supplying ink box
(3) ink supply blotting solenoid valve (12), the high-pressure air source or the low-pressure gas source are installed on the pipeline for supplying ink box (3) gas supply
Have ink supply throttle valve (16), the signal output end of ink supply barometer (5) is connect with the input terminal of controller (20), ink supply pressure ink electricity
The input terminal of magnet valve (13) and the input terminal of ink supply blotting solenoid valve (12) are connect with the output end of controller (20)；
Described time black air pressure adjustment unit includes being mounted on back on print cartridge (4) for acquiring back the Hui Moqi of print cartridge (4) interior air pressure
The ink that returns that pressure meter (6), control high-pressure air source enter back print cartridge (4) presses black solenoid valve (14) and control low-pressure gas source to enter back print cartridge
(4) time black blotting solenoid valve (15), the high-pressure air source or the low-pressure gas source are back to install on the pipeline of print cartridge (4) gas supply
There is back black throttle valve (17), the signal output end for returning black barometer (6) is connect with the input terminal of controller (20), returns ink pressure ink electricity
The input terminal of magnet valve (14) and the input terminal for returning black blotting solenoid valve (15) are connect with the output end of controller (20)；
The dispenser pump (7) is quantitative diaphragm pump, and the quantitative diaphragm pump is connect with 24V DC power supply；Quantitative diaphragm pump connection
It directly starts to work after 24V DC power supply, is controlled without controller (20), simplify the control of ink feeding system, it is easy to operate；It is quantitative
The ink extracted out from the black bucket (1) equivalent that is divided into two is delivered to supplying ink box (3) and returned in print cartridge (4), fixation by diaphragm pump
Supplying ink box (3) and the input quantity for going back to print cartridge (4) when ink supply liquid level sensor (18) detects that supplying ink box (3) interior liquid level is lower, supply
Black pressure regulating pump (11) stepless variable adjusts the regurgitant volume of ink, reduces the regurgitant volume of ink；Ink supply liquid level sensor (18) inspection
When measuring supplying ink box (3) interior liquid level and getting higher, ink supply pressure regulating pump (11) stepless variable adjusts the regurgitant volume of ink, makes the reflux of ink
Amount increases, and adjusts supplying ink box (3) interior liquid level convenient for quickly accurate；Black liquid level sensor (19) are gone back to detect back in print cartridge (4)
When liquid level is lower, the regurgitant volume that black pressure regulating pump (9) stepless variable adjusts ink is returned, the regurgitant volume of ink is reduced；Go back to black liquid position
When sensor (19) detects back that print cartridge (4) interior liquid level is got higher, the regurgitant volume that black pressure regulating pump (9) stepless variable adjusts ink is returned,
Increase the regurgitant volume of ink, convenient for quickly accurately adjusting back print cartridge (4) interior liquid level；Ink in supplying ink box (3) and time print cartridge (4)
The adjusting of aqueous position is adjusted independently of each other, unaffected each other, reduces the transmitting of feedback signal, saves the control time；
It is located at the position between black bucket (1) and dispenser pump (7) on the intake line of the Y type ink inlet tube and filter is installed
(10), degassing module (8) is installed on the output pipe connecting in the Y type ink inlet tube with supplying ink box (3).
2. a kind of totally-enclosed double negative-pressure cyclic ink feeding systems of Digital ink-jet printer described in accordance with the claim 1, feature
Be: the vacuum degree of the ink-outtake end of double negative pressure print heads be -66mbar~-64mbar, double negative pressure print heads into
The vacuum degree of Mo Duan is -36mbar~-34mbar.
3. a kind of totally-enclosed double negative-pressure cyclic ink feeding systems of Digital ink-jet printer described in accordance with the claim 1, feature
Be: the ink supply liquid level adjusts unit and includes ink supply pressure regulating pump (11) and be mounted on supplying ink box (3) for acquiring supplying ink box
(3) the ink supply liquid level sensor (18) of interior ink level, ink supply pressure regulating pump (11) are installed between supplying ink box (3) and black bucket (1)
Ink supply ink tube road, the signal output end of ink supply liquid level sensor (18) are connect with the input terminal of controller (20), ink supply tune
The signal input part of press pump (11) is connect with the output end of controller (20).
4. a kind of totally-enclosed double negative-pressure cyclic ink feeding systems of Digital ink-jet printer described in accordance with the claim 1, feature
Be: described time black liquid position adjusts unit and is back black pressure regulating pump (9) and is mounted on back on print cartridge (4) for acquiring go back to print cartridge (4)
Interior ink level goes back to black liquid level sensor (19), and time black pressure regulating pump (9) installs back the Hui Mo between print cartridge (4) and black bucket (1)
Ink tube road, the signal output end for going back to black liquid level sensor (19) are connect with the input terminal of controller (20), return black pressure regulating pump
(9) signal input part is connect with the output end of controller (20).
5. a kind of totally-enclosed double negative-pressure cyclic ink feeding systems of Digital ink-jet printer described in accordance with the claim 1, feature
Be: the air pressure of the high-pressure air source is 30kPa~40kPa, and the air pressure of the low-pressure gas source is -40kPa~-30kPa.
6. a kind of totally-enclosed double negative-pressure cyclic ink feeding systems of Digital ink-jet printer described in accordance with the claim 1, feature
Be: the controller (20) is multichannel PID adjusting apparatus or PLC control module.
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| JP6929678B2 (en) * | 2017-03-24 | 2021-09-01 | 東芝テック株式会社 | Inkjet heads and printers |
| CN107443900A (en) * | 2017-09-01 | 2017-12-08 | 湖北京山轻工机械股份有限公司 | Novel corrugated board ink-jet system |
| CN109664618B (en) * | 2017-10-16 | 2020-10-13 | 北大方正集团有限公司 | Ink supply control system, printing machine, and ink supply control method |
| CN107571615B (en) * | 2017-11-03 | 2023-08-25 | 武汉虹之彩包装印刷有限公司 | Automatic ink supply system |
| CN110774767B (en) * | 2018-07-31 | 2023-08-22 | 北京梦之墨科技有限公司 | Liquid level control assembly and control method of liquid metal ink supply system |
| WO2020032966A1 (en) | 2018-08-10 | 2020-02-13 | Hewlett-Packard Development Company, L.P. | Printing devices |
| JP7251939B2 (en) * | 2018-09-21 | 2023-04-04 | 株式会社Ｓｃｒｅｅｎホールディングス | PRINTING DEVICE, PRINTING SYSTEM, PRINTING METHOD |
| EP3659812A1 (en) | 2018-11-28 | 2020-06-03 | NEOS S.r.l. | Ink supply system for digital printing device and digital printing device comprising said system |
| CN110001204B (en) * | 2019-04-04 | 2020-09-01 | 深圳市华星光电技术有限公司 | Ink jet printing system |
| CN110280716A (en) * | 2019-05-22 | 2019-09-27 | 共享智能铸造产业创新中心有限公司 | A kind of ink discharge device and 3D printing equipment |
| CN111038108B (en) * | 2019-12-10 | 2021-11-23 | Tcl华星光电技术有限公司 | Ink box storage device for ink-jet printing and storage method thereof |
| CN114312024B (en) * | 2020-09-30 | 2023-12-22 | 上海鹤颖数码科技有限公司 | Side inkjet device |
| CN112706524B (en) * | 2020-12-31 | 2024-03-12 | 东莞市图创智能制造有限公司 | Pressure stabilizing circulation ink supply method and device and printing equipment |
| CN113601991B (en) * | 2021-08-18 | 2022-09-02 | 山东蓝海印刷科技有限公司 | Printing ink supply device of printing machine |
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