CN111791599A - Color digital printing machine - Google Patents
Color digital printing machine Download PDFInfo
- Publication number
- CN111791599A CN111791599A CN202010706778.XA CN202010706778A CN111791599A CN 111791599 A CN111791599 A CN 111791599A CN 202010706778 A CN202010706778 A CN 202010706778A CN 111791599 A CN111791599 A CN 111791599A
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- China
- Prior art keywords
- nozzle
- air
- ink drop
- ceramic substrate
- nozzle panel
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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
- B41J2/21—Ink jet for multi-colour printing
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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
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
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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
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
The invention relates to the technical field of digital printing, and discloses a color digital printer which comprises a ceramic substrate, a nozzle panel, a piezoelectric crystal and a vibration diaphragm, wherein the nozzle panel is fixedly connected to the bottom of the ceramic substrate, the ceramic substrate and the nozzle panel form an ink jet assembly, an ink cavity is arranged in an inner cavity of the ceramic substrate, one side surface of the vibration diaphragm is positioned in the ink cavity, and one side of the vibration diaphragm, which is far away from the ink cavity, is in contact with the piezoelectric crystal. The invention divides the main ink drop and the small ink drop by the air flow conveyed by the air pump to the air nozzle, reduces the influence of the small ink drop on the shape and the size of the main ink drop, improves the uniformity of the shape and the size of the main ink drop, improves the printing quality, reduces the dragging of the small ink drop to the main ink drop, reduces the condition that the dripping time of the main ink drop is prolonged due to the adhesion of the small ink drop to the main ink drop, accelerates the main ink drop to fall on a printing stock and improves the printing efficiency.
Description
Technical Field
The invention relates to the technical field of digital printing, in particular to a color digital printing machine.
Background
Digital printing is the digitization of printing technology. Generally refers to the digitization of part or all of the overall process. Digital printing is a comprehensive technology developed on the basis of printing technology, and electronic texts are used as carriers and are transmitted to digital printing equipment through a network to realize direct printing. Ink-jet imaging is one of digital printing and imaging modes, ink is extruded to form ink drops, and the ink drops are attached to a printing stock to form pictures and texts. In inkjet imaging, the uniformity of ink droplet size plays an important role in the stability of the quality of inkjet printing and even affects the reliability of the inkjet system.
Research finds that small ink drops surrounding a main ink drop inevitably exist in the ink drop forming process, and the small ink drops are adhered to the main ink drop to cause the size of the main ink drop to be uneven; in addition, because the small ink drops are usually very small, the small ink drops do not have enough kinetic energy to be sprayed onto a printing stock and are often adsorbed by the surface near the nozzle, in the forming process of the main ink drop, the main ink drop is subjected to the pulling force of the small ink drops due to the adhesion, the kinetic energy of the main ink drop is reduced, meanwhile, the low-falling time of the main ink drop is also prolonged, so that the time from the main ink drop to the printing stock is prolonged, and the printing efficiency is reduced. The reliability of the ink jet printing system is therefore greatly compromised by the presence of the small ink droplets.
Disclosure of Invention
The invention provides a color digital printer, which aims to overcome the defects of the prior color digital printer in the background art in the using process, has the advantages of cutting main ink drops and small ink drops, and solves the problems of uneven size of the main ink drops, reduction of printing quality and low printing efficiency caused by the small ink drops in the background art.
The invention provides the following technical scheme: the utility model provides a colored digital printing machine, includes ceramic substrate, nozzle panel, piezoelectric crystal and vibrations diaphragm, nozzle panel fixed connection is in ceramic substrate's bottom, ceramic substrate and nozzle panel constitute the inkjet subassembly, be equipped with the ink chamber in ceramic substrate's the inner chamber, a side of vibrations diaphragm is arranged in the ink chamber, the one side that the ink chamber was kept away from to the vibrations diaphragm contacts with piezoelectric crystal, the bottom fixed mounting of nozzle panel has the air cock that is used for cutting the ink droplet, the inlet end of air cock is connected with the air pump, be provided with the trigger mechanism who is used for controlling the air pump switching on the inkjet subassembly.
Preferably, the quantity of air cock is two and is located the nozzle both sides of nozzle panel respectively, the air cock is to keeping away from the one side slope of nozzle panel outer wall, two the length of being connected between air cock and the air pump is the same.
Preferably, one side of the air faucet, which faces the nozzle of the nozzle panel, is provided with air passages, and the two air passages on the air faucet are staggered and are horizontally tangent to the side surface.
Preferably, trigger mechanism includes protection box, conducting rod and conducting strip, the both ends fixed connection of protection box is on ceramic substrate's inner wall, the conducting rod runs through the top and the activity of protection box and cup joints on the outer wall of protection box, the one end fixed connection that the conducting rod is located the protection box outside is on the outer wall of vibrations diaphragm center department, conducting strip fixed mounting is in the inside of protection box and is located the conducting rod under, conducting rod and conducting strip all are connected with the control circuit of air pump.
Preferably, a sealing ring is arranged at the joint of the protective box body and the conductive rod, and an insulating sleeve is arranged on the outer wall of the conductive rod.
Preferably, the trigger mechanism includes plate electrode and conductive needle, plate electrode fixed mounting is in the nozzle both sides of nozzle panel, the conductive needle is located the below of plate electrode, the quantity of conductive needle is two and is located the nozzle both sides of nozzle panel respectively, two be equipped with the clearance between the conductive needle and all be connected with the control circuit of air pump.
Preferably, one end of the conductive needle close to the nozzle of the nozzle panel is in a needle point shape.
The invention has the following beneficial effects:
1. the invention divides the main ink drop and the small ink drop by the high-speed air flow conveyed by the air pump to the air nozzle, reduces the influence of the small ink drop on the shape and the size of the main ink drop, improves the uniformity of the shape and the size of the main ink drop, improves the printing quality, reduces the dragging of the small ink drop to the main ink drop, reduces the condition that the dripping time of the main ink drop is prolonged due to the adhesion of the small ink drop to the main ink drop, accelerates the main ink drop to fall on a printing stock and improves the printing efficiency.
2. The invention realizes the automation of ink drop cutting by automatically switching on the air pump when the main ink drop is formed by the trigger mechanism, and simultaneously, the uniformity of the size of the ink drop is further improved because the conditions for cutting the ink drop set by the trigger mechanism are the same for all the ink drops.
3. The air passages on the two air nozzles are staggered and horizontally arranged in a tangent mode, so that the positions of airflow beams sprayed from the two air nozzles are crossed, the airflow beams are prevented from being impacted and dispersed at the joint of the main ink drop and the small ink drop, the influence of the airflow dispersion on the uniformity and the position of the main ink drop is reduced, in addition, the horizontal arrangement of the air passages in a tangent mode is adopted, the gap between the airflow beams is reduced, the condition that the part is not broken due to the flowing and the adhesion of ink is reduced, and the effect of cutting the ink drops is improved.
Drawings
FIG. 1 is a schematic structural diagram of a normal state according to an embodiment of the present invention;
FIG. 2 is a schematic view of an inkjet printhead according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second normal state according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a second embodiment of the present invention in an ink-jet state;
FIG. 5 is a side view of the air faucet of the present invention;
FIG. 6 is a schematic view of the structure of the air faucet of the present invention.
In the figure: 1. a ceramic substrate; 2. a nozzle face plate; 3. an ink chamber; 4. a piezoelectric crystal; 5. vibrating the diaphragm; 6. a trigger mechanism; 601. a protective box body; 602. a conductive rod; 603. a conductive sheet; 611. an electrode plate; 612. a conductive pin; 7. an air tap; 701. an airway; 8. an air pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-6, a color digital printer includes a ceramic substrate 1, a nozzle panel 2, a piezoelectric crystal 4 and a vibration diaphragm 5, the nozzle panel 2 is fixedly connected to the bottom of the ceramic substrate 1, the ceramic substrate 1 and the nozzle panel 2 form an inkjet assembly, an ink chamber 3 is disposed in an inner cavity of the ceramic substrate 1, one side surface of the vibration diaphragm 5 is disposed in the ink chamber 3, one side of the vibration diaphragm 5 away from the ink chamber 3 contacts the piezoelectric crystal 4, an air nozzle 7 for cutting ink droplets is fixedly installed at the bottom of the nozzle panel 2, an air inlet end of the air nozzle 7 is connected to an air pump 8, the number of the air nozzles 7 is two and respectively disposed at two sides of a nozzle of the nozzle panel 2, the air nozzle 7 is inclined toward a side away from the outer wall of the nozzle panel 2, the inclination angle of the air nozzle 7 is between 0 degree and 90 degrees, and is mainly used for ensuring that an, avoid the air current to blow at the nozzle department of nozzle panel 2, reduce the air-dry condition of air current to nozzle department's ink, thereby reduce the condition that the nozzle blocks up, the length of being connected between two air cocks 7 and air pump 8 is the same, can transmit the gas of air pump 8 to air cock 7 through the pipeline, guarantee that air pump 8 transmits the time in two air cocks 7 with gas the same, namely air cock 7 can jet the air current bundle simultaneously, improve the balanced stress of ink droplet both sides, reduce the ink droplet position skew that leads to because of the unbalance of the impact of air current, refer to figures 5 and 6, air cock 7 is equipped with air flue 701 towards one side of nozzle panel 2 nozzle, air flue 701 staggered arrangement and side level tangent on two air cocks 7, staggered arrangement guarantees that the air current that jets from two air cocks 7 can not collide, avoid dispersing after the air current collision to cause the influence to main ink droplet position and, it can be understood that if the air passages 701 of the two air nozzles 7 are arranged on the same air nozzle 7, the air passages 701 can form a communicated rectangular passage, the arrangement is used for reducing the gap between the air flow beams and ensuring that air flows pass through all the sections of the ink drops, and because the ink has fluidity and adhesiveness, if the gap of the air flow beams is large, the ink in the gap of the air flow beams cannot be disconnected, the arrangement can improve the effect of cutting the ink drops and avoid continuous adhesion of the ink drops due to large gap of the air flow beams;
the ink jet component is provided with a trigger mechanism 6 for controlling the air pump 8 to open and close, and when the trigger mechanism 6 meets a certain condition, the trigger air pump 8 is triggered to open to deliver air in the air nozzle 7 to cut ink drops.
The first embodiment is as follows:
referring to fig. 1-2, the trigger mechanism 6 includes a protection box 601, a conductive rod 602 and a conductive sheet 603, two ends of the protection box 601 are fixedly connected to an inner wall of the ceramic substrate 1, the conductive rod 602 penetrates through a top of the protection box 601 and is movably sleeved on an outer wall of the protection box 601, an insulating sleeve is disposed on an outer wall of the conductive rod 602 for protecting the conductive rod 602, a sealing ring is disposed at a joint of the protection box 601 and the conductive rod 602, so as to prevent ink from permeating into an inner cavity of the protection box 601, one end of the conductive rod 602 located outside the protection box 601 is fixedly connected to an outer wall at a center of the vibration diaphragm 5, the conductive sheet 603 is fixedly installed inside the protection box 601 and located right below the conductive rod 602, the conductive rod 602 and the conductive sheet 603 are both connected to a control circuit of the air pump 8: after a control system of the printer applies pulse current to the piezoelectric crystal 4, the piezoelectric crystal 4 deforms to push the vibration diaphragm 5 to extrude ink in the ink cavity 3 to flow out from a nozzle of the nozzle panel 2, the piezoelectric crystal 4 deforms and simultaneously pushes the conductive rod 602 to move towards the inside of the protective box body 601, when the piezoelectric crystal 4 deforms to the maximum deformation state, the conductive rod 602 is in contact with the conductive sheet 603, a circuit of the air pump 8 is connected, the air pump 8 starts and conveys air to the air nozzle 7, an air flow beam sprayed by the air nozzle 7 impacts at the joint of a main ink drop and a small ink drop to cut the main ink drop and the small ink drop, and in the scheme, the main ink drop is formed when the maximum deformation state of the piezoelectric crystal 4 is set.
Example two:
referring to fig. 3-4, the triggering mechanism 6 includes an electrode plate 611 and conductive pins 612, the electrode plate 611 is fixedly installed at two sides of the nozzle panel 2, during the formation process of the ink droplets from small to large, the electrode plate 611 is used to carry charges to the ink droplets, so that the ink droplets become conductors, the conductive pins 612 are located below the electrode plate 611, the number of the conductive pins 612 is two and located at two sides of the nozzle panel 2, respectively, a gap is provided between the two conductive pins 612 and connected to the control circuit of the air pump 8, the width of the gap between the two conductive pins 612 is the maximum width of the cross section of the main ink droplet, and the principle is as follows: in the process of forming the ink drops, when the main ink drops swell to be in contact with the conductive pins 612 on the two sides, the circuit of the air pump 8 is switched on, the air pump 8 is started and delivers air to the air faucet 7, one end of the conductive pin 612 close to the nozzle of the nozzle panel 2 is in a needle point shape, namely, one end of the conductive pin 612, which is in contact with the main ink drops, is as small as possible, and the influence of the tip of the conductive pin 612 on the shape of the main ink drops is reduced.
The using method of the invention is as follows:
firstly, after a control system of the printer sends a pulse signal to the piezoelectric crystal 4, the piezoelectric crystal 4 deforms to extrude ink in the ink cavity 3, so that the ink is extruded from a nozzle of the nozzle panel 2 and forms ink drops, secondly, after the trigger mechanism 6 is prompted to act under a certain condition, a circuit of the air pump 8 is switched on, finally, after the air pump 8 is started, air is conveyed into the air nozzle 7 through a pipeline, and under the impact of air flow, main ink drops and small ink drops are cut and separated.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a colored digital printer, includes ceramic substrate (1), nozzle panel (2), piezoelectric crystal (4) and vibrations diaphragm (5), nozzle panel (2) fixed connection is in the bottom of ceramic substrate (1), ceramic substrate (1) and nozzle panel (2) constitute the inkjet subassembly, be equipped with ink chamber (3) in the inner chamber of ceramic substrate (1), a side of vibrations diaphragm (5) is located ink chamber (3), one side that ink chamber (3) were kept away from in vibrations diaphragm (5) contacts its characterized in that with piezoelectric crystal (4): the bottom fixed mounting of nozzle panel (2) has air cock (7) that are used for cutting the ink droplet, the inlet end of air cock (7) is connected with air pump (8), be provided with trigger mechanism (6) that are used for controlling air pump (8) switching on the inkjet subassembly.
2. A color digital printer according to claim 1, characterized in that: the quantity of air cock (7) is two and is located the nozzle both sides of nozzle panel (2) respectively, air cock (7) is to keeping away from the one side slope of nozzle panel (2) outer wall, two the length of being connected between air cock (7) and air pump (8) is the same.
3. A color digital printer according to claim 2, characterized in that: air flue (701) have been seted up towards one side of nozzle panel (2) nozzle in air cock (7), two air flue (701) staggered arrangement and side level tangent on air cock (7).
4. A color digital printer according to claim 1, characterized in that: trigger mechanism (6) are including protection box (601), conducting rod (602) and conducting strip (603), the both ends fixed connection of protection box (601) is on the inner wall of ceramic substrate (1), top and the activity that conducting rod (602) run through protection box (601) are cup jointed on the outer wall of protection box (601), one end fixed connection that conducting rod (602) are located the protection box (601) outside is on the outer wall of vibrations diaphragm (5) center department, conducting strip (603) fixed mounting is in the inside of protection box (601) and is located conducting rod (602) under, conducting rod (602) and conducting strip (603) all are connected with the control circuit of air pump (8).
5. A color digital printer according to claim 4, characterized in that: the connection position of the protective box body (601) and the conductive rod (602) is provided with a sealing ring, and the outer wall of the conductive rod (602) is provided with an insulating sleeve.
6. A color digital printer according to claim 1, characterized in that: the trigger mechanism (6) comprises an electrode plate (611) and two conductive needles (612), the electrode plate (611) is fixedly installed on two sides of a nozzle of the nozzle panel (2), the conductive needles (612) are located below the electrode plate (611), the conductive needles (612) are two in number and located on two sides of the nozzle panel (2), and a gap is formed between the two conductive needles (612) and is connected with a control circuit of the air pump (8).
7. A color digital printer according to claim 6, characterized in that: one end of the conductive needle (612) close to the nozzle of the nozzle panel (2) is in a needle point shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010706778.XA CN111791599B (en) | 2020-07-21 | 2020-07-21 | Color digital printing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010706778.XA CN111791599B (en) | 2020-07-21 | 2020-07-21 | Color digital printing machine |
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| Publication Number | Publication Date |
|---|---|
| CN111791599A true CN111791599A (en) | 2020-10-20 |
| CN111791599B CN111791599B (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010706778.XA Active CN111791599B (en) | 2020-07-21 | 2020-07-21 | Color digital printing machine |
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| CN (1) | CN111791599B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112428690A (en) * | 2020-11-12 | 2021-03-02 | 李孟 | Prevent that spout department's coating ink from air-drying advertisement that solidifies and spout seal equipment in batches |
| CN115265706A (en) * | 2022-08-11 | 2022-11-01 | 福建润多晋科技有限公司 | Device and method for measuring residual quantity of powdered ink |
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| CN115265706A (en) * | 2022-08-11 | 2022-11-01 | 福建润多晋科技有限公司 | Device and method for measuring residual quantity of powdered ink |
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| Publication number | Publication date |
|---|---|
| CN111791599B (en) | 2021-06-04 |
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