CN212332161U

CN212332161U - Code spraying device and combined spray head thereof

Info

Publication number: CN212332161U
Application number: CN202020479381.7U
Authority: CN
Inventors: 梁立星; 邓卡珊
Original assignee: Qingyuan Zhuoli Logo Technology Co ltd
Current assignee: Qingyuan Zhuoli Logo Technology Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2021-01-12
Anticipated expiration: 2030-04-03

Abstract

The utility model relates to a spout a yard device and combination shower nozzle thereof, the combination shower nozzle is including the first shower nozzle and the second shower nozzle that can simultaneous working, the electric field that deflects of first shower nozzle is opposite with the direction of the electric field that deflects of second shower nozzle, and the intersection point that first shower nozzle and second shower nozzle are used for spouting the projection line of the flight track of the charging ink droplet of seal target pattern on the third plane is located the projection line on the third plane of the face of undertaking the printing of stock when spouting seal target pattern in coordination, so that each of constituting target pattern spouts the seal row and can be accomplished simultaneously, wherein the third plane is mutually perpendicular and second plane mutually perpendicular with first plane; the first plane is parallel to the printing surface, and the second plane is perpendicular to the moving direction of the printing stock. The utility model provides a spout a yard device and combination shower nozzle thereof no matter how the stock moving speed changes, each that constitutes target pattern spouts the seal row and is all accomplished by the while, so target pattern's upper and lower part can control throughout and align.

Description

Code spraying device and combined spray head thereof

Technical Field

The utility model belongs to the technical field of the industry is spouted yard and is printed in the inkjet, concretely relates to spout a yard device and combination shower nozzle thereof.

Background

The code spraying device is an ink jet printing device which is controlled by a computer and is used for marking on a product in a non-contact mode, the basic structure of the code spraying device can refer to fig. 1, the code spraying device shown in fig. 1 comprises a spray head, the spray head comprises a spray nozzle 1, a charging groove 2, a deflection electrode and a recovery groove 6, and the deflection electrode comprises a negative polarity deflection electrode 4 and a positive polarity deflection electrode 5. The nozzle 1 ejects continuous and uniform ink droplets 3 at a constant pressure, and a deflection electric field is formed in a region between the negative polarity deflection electrode 4 and the positive polarity deflection electrode 5. When the code spraying device carries out the spray printing work, the nozzle 1 sprays continuous and uniform ink drops 3 at a certain pressure under the control of a computer, and the ink drops 3 are charged or not charged when flying through the charging slot 2 at a certain speed; the ink drops 3 continuously fly through the deflecting electric field after passing through the charging slot 2, wherein the flying track of the charged ink drops is deflected when flying through the deflecting electric field, and falls on the surface of a printing stock 7 passing below the spray head at a certain moving speed to form a specific pattern, such as an capital letter E shown in FIG. 2; when the uncharged ink drops fly through the deflection electric field, the flight track cannot deflect and still flies along a straight line, and the uncharged ink drops fall into the recovery tank 6 which is arranged right below the nozzle 1 and above the printing stock 7, are recovered by the recovery tank 6 and reenter the ink system without falling on the printing surface of the printing stock 7.

When the code spraying device performs the spray printing work, the computer controls the code spraying device to spray and print each spray printing point on the printing stock 7 by taking an object needing spray printing as a sample, so that a pattern corresponding to the object needing spray printing is sprayed and printed. For example, referring to fig. 2, the object to be jet printed is a capital letter E, and the jet printing dots for jet printing the pattern corresponding to the object to be jet printed include 4 columns and 5 rows, and total 14 jet printing dots, where the number of rows and the number of columns are merely examples.

Because the maximum jet printing height of each spray head is limited (most of the current code spraying machines, each row of single spray heads can only print 34 jet printing points at most). Therefore, when it is desired to print a pattern with an excessive number of dots (e.g., more than 34 dots) in the longitudinal direction (i.e., in each column), it is necessary to perform the printing by using two or more nozzles in cooperation. For example, when it is desired to eject target patterns of "E1" and "E2" longitudinally disposed as shown in fig. 3 (for simplicity of illustration, only 18 dots per column of the target pattern in this example), the portion "E1" shown in fig. 4a may be ejected by a first head and the portion "E2" shown in fig. 4b may be ejected by a second head. The specific method can be realized by arranging two spray heads back and forth along the moving direction of the printing stock, wherein one spray head is arranged on the left side of the advancing direction of the printing stock, and the other spray head is arranged on the right side of the advancing direction of the printing stock. And when the printing stock passes below the first spray head, the spray printing of the part E1 is completed, and then when the printing stock passes below the second spray head, the spray printing of the part E2 is completed.

Because the target pattern is formed by respectively spraying and printing one part of two spray heads which are arranged in tandem along the moving direction of the printing stock, when the same pattern is sprayed and printed cooperatively, in order to align the upper part and the lower part (namely 'E1' and 'E2') in the target pattern shown in FIG. 3 to the left and the right, an appropriate delay value must be set between the two spray nozzles based on the moving speed of the printing stock, otherwise, the pattern obtained by spraying and printing has the phenomenon of left-right misalignment between the upper part and the lower part, as shown in FIG. 5. However, accurate compensation for misalignment as shown in figure 5 must rely on accurate monitoring of the speed of substrate movement. In practical applications, the speed monitoring device cannot be installed in many cases, or the error of the speed monitoring device is too large, so that the upper and lower portions of the target pattern are shifted from each other in the left-right direction as shown in fig. 5.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem of dislocation about two parts of spouting the seal respectively of above-mentioned same pattern, the embodiment of the utility model provides a spout a yard device and combination shower nozzle thereof.

In an aspect of the embodiments of the present invention, a combined nozzle of a code spraying device is provided, where the combined nozzle includes a first nozzle and a second nozzle that can work simultaneously, a deflection electric field of the first nozzle is opposite to a deflection electric field of the second nozzle, and an intersection point of projection lines of flight trajectories of charged ink droplets, which are used for jet printing a target pattern, of the first nozzle and the second nozzle on a third plane is located on a projection line of a print supporting plane of a printed material on the third plane when the target pattern is jet printed in cooperation, so that each jet printing line constituting the target pattern can be completed simultaneously, where the third plane is perpendicular to the first plane and perpendicular to the second plane; the first plane is parallel to the printing surface, and the second plane is perpendicular to the moving direction of the printing stock.

In some embodiments, the first and second nozzles are identical in structure and size, and are arranged in a 180 ° opposite direction and in tandem along the direction of movement of the substrate.

In some embodiments, the first and second nozzles are arranged in tandem along the direction of substrate movement;

the first showerhead comprises a first A-polarity deflection electrode and a first B-polarity deflection electrode;

the second spray head comprises a second A polarity deflection electrode and a second B polarity deflection electrode;

the A polarity and the B polarity are mutually opposite polarities;

the first B-polarity deflection electrode and the second B-polarity deflection electrode are arranged in front of and behind the printing stock moving direction, the first A-polarity deflection electrode and the second A-polarity deflection electrode are respectively positioned on two sides separated by the first B-polarity deflection electrode and the second B-polarity deflection electrode, the first B-polarity deflection electrode is at least arranged corresponding to the first A-polarity deflection electrode, and the second B-polarity deflection electrode is at least arranged corresponding to the second A-polarity deflection electrode.

In some embodiments, the first head further includes a first recovery groove, the second head further includes a second recovery groove, the first B-polarity deflection electrode is formed with a notch along a direction of an ink line of the first head, and the first recovery groove is disposed corresponding to the notch of the first B-polarity deflection electrode; the second B-polarity deflection electrode is formed with a notch along the ink line direction of the second head, and the second recovery tank is disposed corresponding to the notch of the second B-polarity deflection electrode.

In some embodiments, the notch of the first B-polarity deflection electrode is an elongated notch with a narrow top and a wide bottom projected on the second plane, and the notch of the second B-polarity deflection electrode is an elongated notch with a narrow top and a wide bottom projected on the second plane.

In some embodiments, the first nozzle further comprises a third a-polarity deflection electrode, the third a-polarity deflection electrode is arranged corresponding to the first B-polarity deflection electrode and is positioned on the same side as the second a-polarity deflection electrode, and the third a-polarity deflection electrode and the second a-polarity deflection electrode are arranged in front of and behind the printing material moving direction; the second nozzle further comprises a fourth A-polarity deflection electrode, the fourth A-polarity deflection electrode and the second B-polarity deflection electrode are arranged correspondingly and are positioned on the same side of the first A-polarity deflection electrode, and the fourth A-polarity deflection electrode and the first A-polarity deflection electrode are arranged in a front-back mode along the moving direction of the printing stock;

the first and fourth a-polarity deflection electrodes are adjacent and electrically insulated from each other, and the second and third a-polarity deflection electrodes are adjacent and electrically insulated from each other.

In some embodiments, the notch of the first B-polarity deflection electrode is opposite to the notch of the second B-polarity deflection electrode, and the first B-polarity deflection electrode and the second B-polarity deflection electrode are in zero-resistance contact with each other.

In some embodiments, the flight trajectories of the charged ink droplets of the first and second jets are collinear or equally spaced at adjacent projected boundaries on the second plane, and the regions within the projected boundaries do not coincide with each other; the projection boundary of the flying locus of the charged ink drop on the second plane is a straight line part of the flying locus of the charged ink drop with the minimum deflection amplitude below the deflection electric field or a straight line part of the flying locus of the charged ink drop with the maximum deflection amplitude below the deflection electric field.

In some embodiments, the projections of the virtual ejection points of the first and second ejection heads on the second plane coincide;

or the projections of the virtual ejection points of the first spray head and the second spray head on the second plane are not coincident, and the projections of the virtual ejection points of the first spray head and the second spray head on the second plane are both positioned on the collinear projection boundary or the projections of the virtual ejection points of the first spray head and the second spray head on the second plane are spaced in a manner of being consistent with the equidistant spacing;

the virtual ejection point of the nozzle represents an intersection point of the flight path of the charged ink drop with the minimum deflection amplitude of the nozzle and the flight path of the charged ink drop with the maximum deflection amplitude after the straight line part below the deflection electric field is extended reversely.

In some embodiments, the first a-polarity deflection electrode and the fourth a-polarity deflection electrode are arranged to control a direction of a deflection electric field of the first showerhead, and the second a-polarity deflection electrode and the third a-polarity deflection electrode are arranged to control a direction of a deflection electric field of the second showerhead.

It is to be understood that the above embodiments may be combined arbitrarily without affecting the implementation.

In another aspect of the embodiment of the present invention, a code spraying apparatus is provided, which includes the combined nozzle and the control portion as described in any one of the above, the control portion cuts the pattern to be sprayed and printed on the printing surface of the printing material along the moving direction of the printing material to obtain the sub-pattern to be sprayed and printed, and allocates the corresponding sub-patterns to be sprayed and printed to the first nozzle and the second nozzle; the first and second heads jet-print the distributed sub-patterns under the control of the control section.

The utility model has the advantages that: the embodiment of the utility model provides an among the yard device of spouting and combination shower nozzle thereof, when first shower nozzle and second shower nozzle spout the seal target pattern in coordination, because the nodical of the projection line that is used for the flight track of the charging ink droplet of spout seal target pattern on the third plane of first shower nozzle and second shower nozzle is located the printing face of undertaking the printing of stock on the projection line on the third plane, consequently, no matter how the moving speed of stock changes, each that constitutes target pattern spouts the seal row and all is accomplished by the while, so the upper and lower part of target pattern is all the right and left justification.

Further, the embodiment of the present invention provides a projection boundary collineation or equidistant interval of the flying trace of the charging ink drop of two nozzles for spraying and printing the adjacent sub-patterns on the second plane, and the regions in the projection boundary do not coincide with each other, so that when the two nozzles for spraying and printing the adjacent sub-patterns are spraying and printing the most end part of the joint position of the adjacent sub-patterns, the flying trace of the charging ink drop sprayed by the two nozzles for spraying and printing the adjacent sub-patterns is parallel to each other on the straight line part below the deflection electric field, even if the vibration of the device and the error of the size of the printing stock and other factors cause the distance between the printing surface and the nozzles to change within a certain range, the phenomenon of coincidence or too large distance between the spraying and printing patterns of the two nozzles does not occur, therefore, the joint of two parts of the same pattern of the respective spraying and printing is tight, and the.

Furthermore, the embodiment of the utility model changes the prior combined mode that a deflection electrode is composed of a positive electrode and a negative electrode, and by replacing one electrode with two electrodes without changing the electric polarity, and further, the deflection direction of the deflection electric field can be controlled by controlling the voltage applied to each electrode, without any mechanical manipulation of the electrodes, the deflection is only the direction of the electric field, not the electrode, and the deflection direction of the deflection electric field can be controlled to overcome the deformation of the spray printing pattern caused by different moving speeds of the printing stock, but also can overcome the deformation of the spray printing pattern caused by the positive and negative directions (or reciprocating) movement of the printing stock, and further, in the situation of the double-nozzle cooperative jet printing, the technical effect of overcoming the deformation can be achieved by controlling the direction of the deflection electric field of each nozzle. Therefore, when the first spray head and the second spray head are used for spraying and printing cooperatively, the intersection point of the projection line of the flight path of the charged ink drops of the first spray head and the second spray head for spraying and printing the target pattern on the third plane is positioned on the projection line of the printing bearing surface of the printing stock on the third plane, so that each spraying and printing column forming the target pattern is completed simultaneously, the upper part and the lower part of the target pattern are always aligned left and right no matter how the moving speed of the printing stock is changed, and the defect of pattern deformation can be overcome. Additionally, the embodiment of the utility model provides a combination shower nozzle and spout a yard device can real-time automatic control electric field direction. Further, the embodiment of the utility model provides a combination shower nozzle and spout a yard device makes real-time adjustment through the different moving speed based on the stock to the direction of electric field that deflects, even the stock moving speed takes place great range change, or when moving direction is opposite, spout the pattern of seal and also can not take place obvious deformation.

Drawings

Fig. 1 is a schematic structural diagram of a conventional code spraying device;

fig. 2 is a schematic view showing the spray printing effect of the existing code spraying device for spray printing capital letter E;

FIG. 3 is a schematic diagram showing the expected jet printing effect of a conventional inkjet printing device for jet printing longitudinally-arranged target patterns of 'E1' and 'E2';

FIGS. 4a and 4b are schematic views respectively showing two nozzles each ejecting a portion of the pattern shown in FIG. 3;

FIG. 5 is a schematic diagram showing the left and right misalignment of the patterns printed by the two nozzles;

fig. 6a, 6b and 6c respectively show schematic diagrams of a third plane, a second plane and a first plane corresponding to the same reference object defined in the inkjet printing device and the combined nozzle thereof according to the embodiment of the present invention;

fig. 7a and 7b are schematic diagrams illustrating a code spraying device and a combined nozzle thereof according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of one nozzle in the combined nozzles of the code spraying device according to the embodiment of the present invention;

fig. 9 is a schematic structural diagram of a deflection electrode of one nozzle in a combined nozzle of a code spraying device according to an embodiment of the present invention;

fig. 10 is a schematic view of a partial cross-sectional structure of one nozzle in a combined nozzle of a code spraying device according to an embodiment of the present invention;

fig. 11 is a schematic view of a partial cross-sectional structure of a combined nozzle of a code spraying device according to an embodiment of the present invention;

FIGS. 12a and 12b are schematic views respectively showing the over-spacing or overlap of the partial pattern joints printed by the two nozzles;

fig. 13a is a schematic projection diagram of a combined nozzle of a code spraying device according to an embodiment of the present invention on a second plane;

fig. 13b is a schematic projection diagram of a virtual exit point and a projection boundary of a combined nozzle of the inkjet printing apparatus according to an embodiment of the present invention on a second plane;

fig. 14 is a schematic structural diagram of a code spraying device according to an embodiment of the present invention;

fig. 15a and 15b show schematic diagrams of embodiments of the present invention for illustrating the working principle;

fig. 16a is a schematic diagram illustrating an embodiment of a virtual ejection point and a projection boundary of a code spraying device according to an embodiment of the present invention in different situations;

fig. 16b is a schematic diagram illustrating another embodiment of a virtual ejection point and a projection boundary of a code spraying device according to an embodiment of the present invention in different situations;

fig. 17a and 17b are schematic structural diagrams illustrating a combined nozzle of a code spraying device in a preferred embodiment according to an embodiment of the present invention;

fig. 18a, 18b and 18c are schematic diagrams illustrating a preferred structure of a combined nozzle of a code spraying device according to an embodiment of the present invention;

FIG. 19 is a schematic diagram showing an electric field generated by a deflection electrode of a conventional inkjet printing apparatus;

FIGS. 20a and 20b are schematic diagrams respectively showing the effect of jet printing at different moving speeds of a printing material;

fig. 21 is a schematic structural diagram of the inkjet printing apparatus according to the embodiment of the present invention, in a case where the a-polarity deflection electrode of the deflection electrode includes two a-polarity electrodes and the B-polarity deflection electrode includes one B-polarity electrode, the two a-polarity electrodes are arranged along the moving direction of the printing material;

fig. 22a is a schematic diagram illustrating that when the a-polarity deflection electrode includes two a-polarity electrodes and the B-polarity deflection electrode includes one B-polarity electrode, the first a-polarity electrode generates the first deflection electric field when a voltage is applied to the first a-polarity electrode, according to the deflection electrode of the inkjet printing apparatus provided in the embodiment of the present invention;

fig. 22B is a schematic diagram illustrating that when the a-polarity deflection electrode includes two a-polarity electrodes and the B-polarity deflection electrode includes one B-polarity electrode, the second a-polarity electrode generates a second deflection electric field when a voltage is applied to the second a-polarity electrode, according to the deflection electrode of the inkjet printing apparatus provided in the embodiment of the present invention;

fig. 23 is a schematic diagram illustrating a direction of a deflection electrode of the inkjet printing apparatus when an a-polarity deflection electrode includes two a-polarity electrodes and a B-polarity deflection electrode includes a B-polarity electrode, and when the first deflection electric field and the second deflection electric field have the same intensity;

fig. 24 shows a schematic diagram of the direction of the deflection electrode of the inkjet printing apparatus when the intensity of the first deflection electric field is stronger than that of the second deflection electric field when the a-polarity deflection electrode includes two a-polarity electrodes and the B-polarity deflection electrode includes one B-polarity electrode;

fig. 25 is a schematic view illustrating a direction of a deflection electrode of the inkjet printing apparatus according to an embodiment of the present invention when an intensity of a second deflection electric field is stronger than an intensity of a first deflection electric field when an a-polarity deflection electrode includes two a-polarity electrodes and a B-polarity deflection electrode includes a B-polarity electrode;

fig. 26a, fig. 26B, fig. 26c and fig. 26d respectively show the schematic diagrams of each electric field of the code spraying device deflection electrode of the real-time automatic control deflection angle provided by the embodiment of the present invention under the condition that the a polarity deflection electrode comprises two a polarity electrodes and the B polarity deflection electrode comprises two B polarity electrodes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the present invention is not limited to the drawings and the following embodiments.

As used herein, the term "include" and its various variants are to be understood as open-ended terms, which mean "including, but not limited to. The term "one embodiment" and the like may be understood as "at least one embodiment". The term "another embodiment" and the like may be understood as "at least one other embodiment". The term "based on" and the like may be understood as "based at least on". The terms "first", "second", "third", etc. are used merely to distinguish different features and have no essential meaning. The terms "left", "right", "front", "rear" and the like are used only to indicate a positional relationship between relative objects.

Example 1

As described above, when the same pattern (for example, the pattern shown in fig. 3, the paper surface corresponds to the receiving surface of the material, and the moving direction of the material is the left-right direction of the paper surface) is co-jet printed, there is a possibility that the upper and lower portions in the pattern (for example, "E1" and "E2" shown in fig. 4a and 4b, respectively, the paper surface corresponds to the receiving surface of the material, and the moving direction of the material is the left-right direction of the paper surface) are shifted in the left-right direction (for example, in fig. 5, the paper surface corresponds to the receiving surface of the material, and the moving direction of the material is the left-right direction. Based on this, the utility model provides a spout a yard device and combination shower nozzle thereof, the combination shower nozzle is including the first shower nozzle and the second shower nozzle that can work simultaneously, the electric field that deflects of first shower nozzle is opposite with the direction of the electric field that deflects of second shower nozzle, first shower nozzle and second shower nozzle are used for spouting the point of intersect of the projection line on third plane C of the flight track of the charging ink droplet of seal target pattern when spouting seal target pattern in coordination on third plane C to make and constitute each of seal line of spouting of target pattern to be accomplished simultaneously, wherein, third plane C is mutually perpendicular with first plane A, and mutually perpendicular with second plane B; the first plane a is parallel to the printing surface, the second plane B is perpendicular to the printing material moving direction, as shown in fig. 6a, 6B, 6C, 7a, and 7B, the third plane C shown in the drawings is a paper surface, a line segment from the heads 11a, 11B to the recovery tanks 16a, 16B in fig. 7a is a projection of a flight trajectory of the ink droplets not to be charged on the third plane C, a line segment from the heads 11a, 11B to the recovery tanks 16a, 16B in fig. 7B is a projection of a flight trajectory of the charged ink droplets for jet printing the target pattern on the third plane C, and a direction indicated by an arrow in fig. 7B is the printing material moving direction. The embodiment of the utility model provides an in, the crossing point of the flight track of the charging ink droplet that first shower nozzle and second shower nozzle are used for spouting seal target pattern when spout in coordination is located the projection line of the face of undertaking the printing of stock 17 on third plane C on the projection line of third plane C, consequently, no matter how the moving speed of stock changes, each that constitutes target pattern spouts the seal row and is all accomplished by the while, so the upper and lower part of target pattern can control alignment all the time.

Referring to fig. 7a, the first head includes a first nozzle 11a and a first recovery groove 16a, and the ink droplets ejected from the first nozzle 11a fall into the first recovery groove 16a for recovery if they are not charged by a first charging part (not shown) of the first head; the second head includes a second nozzle 11b and a second recovery groove 16b, and the ink droplets ejected from the second nozzle 11b fall into the second recovery groove 16b for recovery if they are not charged by a second charging part (not shown) of the second head. The projections of the first nozzle 11a and the second nozzle 11b on the third plane C (the paper plane corresponds to the third plane C in the figure) are at an angle with each other, and in the cooperative jet printing, the intersection point of the projection lines of the flight paths of the charged ink droplets of the first jet head and the second jet head for jet printing the target pattern on the third plane C is located on the projection line of the printing surface of the substrate 17 on the third plane C, as can be seen in fig. 7 b. The first charging unit and the second charging unit may employ a charging slot or the like.

In one embodiment, the first spray head and the second spray head are arranged in a front-back arrangement along the moving direction of the printing stock; the first showerhead comprises a first A-polarity deflection electrode and a first B-polarity deflection electrode; the second spray head comprises a second A polarity deflection electrode and a second B polarity deflection electrode; the A polarity and the B polarity are mutually opposite polarities, namely when the A polarity is positive, the B polarity is negative, and when the A polarity is negative, the B polarity is positive; the first B-polarity deflection electrode and the second B-polarity deflection electrode are arranged in a front-back manner along the moving direction of the printing stock, the first A-polarity deflection electrode and the second A-polarity deflection electrode are respectively positioned at two sides separated by the first B-polarity deflection electrode and the second B-polarity deflection electrode, the first B-polarity deflection electrode is at least arranged corresponding to the first A-polarity deflection electrode, and the second B-polarity deflection electrode is at least arranged corresponding to the second A-polarity deflection electrode.

In an embodiment, the first and second nozzles have the same structure and size, and are arranged in a 180 ° opposite direction and in tandem along the moving direction of the printing material, as shown in fig. 11. And zero resistance contact is formed between the first B-polarity deflection electrode and the second B-polarity deflection electrode.

Further, as previously described, the first spray head includes a first recovery tank 16a and the second spray head includes a second recovery tank 16 b. In one embodiment, the first B-polarity deflection electrode is formed with a notch along an ink line direction of the first head, and the first recovery groove is disposed corresponding to the notch of the first B-polarity deflection electrode; the second B-polarity deflection electrode is formed with a notch along a direction of an ink line of the second head, and the second recovery groove is disposed corresponding to the notch of the second B-polarity deflection electrode. In an alternative embodiment, the notch of the first B-polarity deflection electrode is an elongated notch having a shape that is narrow at the top and wide at the bottom, so that the first B-polarity deflection electrode has an inclined surface at the notch opposite to the first a-polarity deflection electrode; also, the notch of the second B-polarity deflection electrode has a shape that is narrow at the top and wide at the bottom, so that the second B-polarity deflection electrode has an inclined surface at the notch opposite to the second a-polarity deflection electrode, as can be seen with reference to fig. 8 to 11. The ink lines indicate the flight paths of uncharged ink droplets, that is, the flight paths of uncharged ink droplets that are not used for printing a pattern. Fig. 8 to 10 show examples of the first head among the first head and the second head, to which the second head can be referred. In fig. 8, the arrangement of the ink lines of the first head and the first B-polarity deflection electrode is shown with the paper surface corresponding to the second plane B, and in fig. 8, the first B-polarity deflection electrode is a negative polarity and the first a-polarity deflection electrode is a positive polarity. Fig. 9 is a schematic perspective view of the first B-polarity deflection electrode of the first head, which can be seen as viewed from the lower right of fig. 8 looking up, in which elongated recesses are formed in the ink line direction. Fig. 10 is a schematic diagram showing a main structure of a cross section of a first head along a plane parallel to a first plane, in which a paper plane corresponds to the first plane a, and as shown in the figure, the first head includes a first a-polarity deflection electrode 25a, a first B-polarity deflection electrode 24, and a first recovery groove 26, the first B-polarity deflection electrode is formed with a long-strip-shaped notch along a direction of a line of ink of the first head, and the first recovery groove 26 is located corresponding to the notch of the first B-polarity deflection electrode 24. Fig. 11 is a schematic view showing a main structure of a cross section of a first head and a second head assembled together along a plane parallel to the first plane, where the paper plane of fig. 11 corresponds to the first plane a, the first head includes a first a-polarity deflection electrode 25a, a first B-polarity deflection electrode 24, and a first recovery groove, the first B-polarity deflection electrode 24 is formed with a long-strip-shaped notch along the ink line direction of the first head, and the first recovery groove is located corresponding to the notch of the first B-polarity deflection electrode 24; the second head includes a second a-polarity deflection electrode 35a, a second B-polarity deflection electrode 34, and a second recovery tank, the second B-polarity deflection electrode 34 forms a strip-shaped notch along the ink line direction of the second head, and the second recovery tank is located corresponding to the notch of the second B-polarity deflection electrode 24. When the pattern shown in fig. 3 is jetted in the combined jet structure shown in fig. 11, the first jet jets the "E1" portion and the second jet jets the "E2" portion. In the configuration shown in fig. 11, the first head is located in front of the second head in the direction of movement of the substrate. The first and second nozzles may have other configurations, and the schematic diagram shown in fig. 11 should not be construed as limiting the present embodiment.

The embodiment of the utility model provides a still provide a spout a yard device, including combination shower nozzle and control part, the control part is cut apart the pattern that needs spout the seal at the printing face of stock along stock moving direction to obtain the sub-pattern that needs spout the seal, and for first shower nozzle and second shower nozzle distribution correspond the sub-pattern that needs spout the seal; the first and second heads jet-print the distributed sub-patterns under the control of the control section.

In the code spraying device and the combined spray head thereof provided by the embodiment, when the first spray head and the second spray head are used for spraying and printing the projection line of the flight trajectory of the charged ink drop of the target pattern on the third plane, the intersection point is located on the projection line of the printing bearing surface of the printing stock on the third plane, so that the nozzles of the first spray head and the nozzles of the second spray head can spray and print simultaneously when each line of the target pattern is sprayed and printed in a coordinated manner, therefore, no matter how the moving speed of the printing stock changes, each spraying and printing line forming the target pattern is completed simultaneously, and the upper part and the lower part of the target pattern are always aligned left and right.

Example 2

In this embodiment, on the basis of embodiment 1, the technical problem of poor bonding effect of the plurality of separately printed portions of the same pattern can be further solved.

Since the target pattern is formed by respectively spraying and printing one part of two nozzles and splicing the parts, the positioning of the part "E1" and the part "E2" sprayed and printed by the two nozzles on the printing stock needs to be accurate so as to ensure that the lower part of the part "E1" is tightly jointed with the upper part of the part "E2", otherwise, the situation that the distance between the parts is overlarge as shown in FIG. 12a or the parts are overlapped as shown in FIG. 12b can occur, so that the jointing effect of the parts sprayed and printed by the same pattern is poor, and the paper surfaces of FIG. 12a and FIG. 12b correspond to the printing bearing surface of the printing stock.

In order to solve the technical problem of poor joint effect, in the embodiment, the adjacent projection boundaries of the flight trajectories of the charged ink droplets of the first nozzle and the second nozzle on the second plane are collinear, and the areas in the projection boundaries do not coincide with each other; or the flight paths of the charged ink drops of the first nozzle and the second nozzle are equidistantly spaced on the adjacent projection boundaries on the second plane, and the areas in the projection boundaries do not coincide with each other. The projection boundary of the flying locus of the charged ink drop on the second plane is a straight line part of the flying locus of the charged ink drop with the minimum deflection amplitude below the deflection electric field or a straight line part of the flying locus of the charged ink drop with the maximum deflection amplitude below the deflection electric field. Fig. 13a shows a projection of the respective nozzles, ink lines and recovery grooves of the first and second heads onto a second plane, the paper plane of fig. 13a corresponding to the second plane B, the nozzles of the first and second heads being at an angle to each other, the ink lines being the flight paths of uncharged ink droplets, which are recovered by the recovery grooves. In order to solve the technical problem that when the distance between the printing surface and the nozzles is changed, the joint effect of a plurality of separately-jetted parts of the same pattern is poor, and the distance is too large or overlapped, the projection boundaries of the flight paths of the charged ink drops of the first nozzle and the second nozzle on the second plane are collinear or at equal intervals, fig. 13B shows the situation that the projection boundaries of the flight paths of the charged ink drops of the first nozzle and the second nozzle on the second plane are collinear, and the paper surface of fig. 13B corresponds to the second plane B.

Embodiment 2 will be described in detail below with reference to the drawings. When the charged ink droplets (ink droplets for jet printing) fly through the range of the deflecting electric field, they will make a parabolic movement to deviate from the recovery part (e.g. recovery tank, recovery tube), and after leaving the deflecting electric field, they will fly along a straight line and finally land on the printing surface of the printing material, as shown in fig. 14, the paper surface of fig. 14 corresponds to the second plane B.

The projection range of the flight trajectory of the charged ink droplet viewed from the second plane is shown in fig. 14, where a path La indicates the flight trajectory of the charged ink droplet with the smallest deflection amplitude, a path Lb indicates the flight trajectory of the charged ink droplet with the largest deflection amplitude, and a path Lo indicates the flight trajectory of the uncharged ink droplet.

For the analysis principle, the straight line portions of the path La and the path Lb under the deflection electric field are extended and intersected in opposite directions at a point J, as shown in fig. 15a, this intersection point is called a virtual output point, and the paper surface of fig. 15a corresponds to a second plane B. The flight trajectory of the charged ink droplets flying along the path La and the path Lb can be simplified to be ejected from the point J and fly in a straight line, as viewed from the outside of the head.

Returning to the foregoing example of the two heads of the coordinated ejection shown in fig. 3, when the "E1" portion and the "E2" portion are respectively ejected, the projection of the flight path range of the charged ink droplets on the second plane is shown in fig. 15B, and the paper plane of fig. 15B corresponds to the second plane B. The drops in the bottom row of the jet "E1" portion fly along path Lb1, and the drops in the top row of the jet "E2" portion fly along path La 2. As can be seen from fig. 15b, the path Lb1 and the path La2 are at an angle with respect to each other and have an intersection, so that when the distance between the print substrate and the head changes, i.e. the print substrate is located below or above the intersection of the path Lb1 and the path La2, an excessive spacing or overlap occurs between the lower part of the "E1" portion and the upper part of the "E2" portion as shown in fig. 12a, and only when the print substrate is located at the intersection of the path Lb1 and the path La2, the lower part of the "E1" portion and the upper part of the "E2" portion can be tightly joined, and the pattern shown in fig. 3 can be printed.

In actual use, the distance between the printing surface and the nozzle is changed constantly within a certain range due to the influence of vibration of the apparatus, errors in the size of the printing material, and the like, so that the bonding effect between the "E1" part and the "E2" part is good or bad.

In order to solve a plurality of not good technical problem of joint effect between the part of spouting the seal respectively of same pattern, the embodiment of the utility model provides a spout a yard device and combination shower nozzle, through the flight track of the ink droplet that charges that sets up the virtual position of shooting point and the range extreme value that deflects of shower nozzle of setting up each shower nozzle, can solve a plurality of not good technical problem of joint effect between the part of spouting the seal respectively of same pattern.

Referring to fig. 14, the paper surface in fig. 14 corresponds to a second plane, and the inkjet printing apparatus provided in this embodiment includes: the combined spray head comprises a first spray head and a second spray head which are arranged in a front-back manner along the moving direction of a printing stock; the control part divides the pattern to be jet printed on the printing bearing surface of the printing stock along the moving direction of the printing stock so as to obtain the sub-pattern to be jet printed; the control part distributes corresponding sub-patterns needing to be sprayed and printed for the first spray head and the second spray head; the first nozzle and the second nozzle jet-print the distributed sub-patterns under the control of the control part, wherein the projection boundaries of the flight tracks of the charged ink drops of the first nozzle and the second nozzle on the second plane are collinear, and the areas in the projection boundaries do not coincide with each other; or the projection boundaries of the flight tracks of the charged ink drops of the first nozzle and the second nozzle on the second plane are equidistantly spaced, and the areas of the projection boundaries do not coincide with each other; the projection boundary of the flying locus of the charged ink drop on the second plane is a straight line part of the flying locus of the charged ink drop with the minimum deflection amplitude below the deflection electric field or a straight line part of the flying locus of the charged ink drop with the maximum deflection amplitude below the deflection electric field.

In an embodiment, the projections of the virtual output points of the first and second heads on the second plane coincide, as shown in fig. 16a and 16B, the paper surface of fig. 16a and 16B corresponds to the second plane B, the path La1 of the first head and the path La2 of the second head are collinear, while the regions in the path La1 and the path Lb1 do not coincide with the projections of the regions in the path La2 and the path Lb2 on the second plane, and the projections of the virtual output point J1 of the first head and the virtual output point J2 of the second head on the second plane coincide. In another embodiment, projections of virtual output points of the first head and the second head on the second plane may not coincide, and projections of the virtual output points of the first head and the second head on the second plane may both be located on the collinear projection boundary, as shown with reference to fig. 17a and 17b, a path La1 of the first head and a path La2 of the second head may be collinear, and a region within the path La1 and the path Lb1 and a projection of a region within the path La2 and the path Lb2 on the second plane may not coincide with each other, a projection of the virtual output point J1 of the first head and a projection of the virtual output point J2 of the second head on the second plane may not coincide, and projections of the virtual output point J1 of the first collinear head and the virtual output point J2 of the second head on the second plane may both be located on the collinear projection boundary; or projections of the virtual ejection points of the two heads that jet print the adjacent sub-patterns on the second plane are spaced in a manner that matches the equidistant spacing (not shown). The intersection point of the flight path of the charged ink drop with the minimum deflection amplitude and the flight path of the charged ink drop with the maximum deflection amplitude of one spray head after the straight line part below the deflection electric field is extended reversely is called a virtual ejection point. In addition, when the projections of the virtual output points of the first and second nozzles on the second plane are not coincident, and the projections of the virtual output points of the first and second nozzles on the second plane are both located on the collinear projection boundary, the projections of the virtual output points of the first and second nozzles on the second plane may be on a line parallel to the moving surface of the printing material or not on a line parallel to the moving surface of the printing material, wherein the projections of the virtual output points of the first and second nozzles on the second plane may be on a line parallel to the moving surface of the printing material, so as to indicate that the projections of the virtual output points of the first and second nozzles on the second plane are the same height relative to the moving surface of the printing material.

Fig. 16a and 16b respectively show a projection schematic of a virtual ejection point on a second plane and a projection schematic of a projection boundary of a flight path of a charged ink droplet on the second plane when the first nozzle and the second nozzle perform coordinated jet printing. In fig. 16a and 16b, the lower part of the sub-pattern printed by the first nozzle corresponds to the charged ink drop with small deflection amplitude, and the upper part of the sub-pattern printed by the first nozzle corresponds to the charged ink drop with large deflection amplitude; the lower part of the sub-pattern jetted by the second nozzle corresponds to the charged ink drop with small deflection amplitude, and the upper part of the sub-pattern jetted by the second nozzle corresponds to the charged ink drop with large deflection amplitude. In the case shown in fig. 16a and 16b, the flight trajectories of the charged ink droplets having the smallest deflection amplitudes of the first head and the second head are collinear on the second plane, but the flight trajectories of the charged ink droplets having the smallest deflection amplitudes of the first head and the second head may be equally spaced on the second plane (not shown). Fig. 16a also shows a preferred embodiment in which the projections of the virtual output points of the two spray heads onto the second plane coincide. Those skilled in the art will appreciate that the projections of the virtual emission points of the first and second heads on the second plane may not coincide, as long as the projections of the virtual emission points of the first and second heads on the second plane are on the collinear projection boundary, as shown in fig. 16 b. Similarly, when the flight paths of the charged ink droplets with the minimum deflection amplitude of the first and second heads are equally spaced on the second plane, the projections of the virtual ejection points of the first and second heads on the second plane may be on a line parallel to the printing surface of the support or not (it can be understood that the vertical heights of the virtual ejection points of the first and second heads with respect to the printing surface are equal or different). In addition, as can be understood by those skilled in the art, the lower part of the sub-pattern printed by the first nozzle corresponds to the charged ink drop with small deflection amplitude, and the upper part of the sub-pattern printed by the first nozzle corresponds to the charged ink drop with large deflection amplitude; the upper part of the sub-pattern sprayed and printed by the second spray head corresponds to the charged ink drop with large deflection amplitude, and the lower part of the sub-pattern sprayed and printed by the second spray head corresponds to the charged ink drop with small deflection amplitude; or the lower part of the sub-pattern jetted by the first jet corresponds to the charged ink drop with large deflection amplitude, and the upper part of the sub-pattern jetted by the first jet corresponds to the charged ink drop with small deflection amplitude; the upper part of the sub-pattern jetted by the second nozzle corresponds to the charged ink drop with large deflection amplitude, and the lower part of the sub-pattern jetted by the second nozzle corresponds to the charged ink drop with small deflection amplitude.

In one embodiment, the projected boundaries of the flight paths of the charged ink droplets of the first and second jets printing adjacent sub-patterns on the second plane are equally spaced, which is suitable for the case where there are blank areas between the adjacent sub-patterns printed, such as the pattern longitudinally combined by "E1" and "E2" shown in fig. 3. The projection of the equal distance on the printing surface is not larger than the blank space between the adjacent sub-patterns of the jet printing.

The projection boundaries of the flying tracks of the charged ink drops corresponding to the first nozzle and the second nozzle on the second plane can be fixed, and can also be adjusted before jet printing.

Furthermore, the code spraying device provided by the embodiment of the utility model leads the projection boundaries of the flying tracks of the charging ink drops of the two spray heads for spraying and printing the adjacent sub-patterns on the second plane to be collinear or spaced at equal intervals, and the areas in the projection boundaries do not coincide with each other, so that when the two spray heads for spraying and printing the adjacent sub-patterns spray and print the most end spraying and printing points at the joint positions of the adjacent sub-patterns, the flying tracks of the charged ink drops sprayed by the two spray heads for spraying and printing the adjacent sub-patterns are mutually parallel in the straight line part below the deflection electric field, even if the distance between the printing bearing surface and the spray heads is changed within a certain range due to factors such as vibration of equipment, size errors of printing stocks and the like, the spray printing patterns of all the spray heads cannot be overlapped or overlarge in distance, so that the multiple parts of the same spray printing pattern are tightly jointed, and the jointing effect is good.

In an embodiment, in the present invention, in a specific implementation, for convenience of installation and adjustment, the outer dimensions and performance parameters of the first nozzle and the second nozzle are designed to be the same, and the projections of the virtual emitting points on the second plane coincide, that is, the positions of the projections of the virtual emitting points on the second plane are the same, and the axes of the nozzles form an appropriate angle, as shown in fig. 17a and 17B, so that the projection boundaries of the flying traces of the charged ink droplets of the first nozzle and the second nozzle that jet-print the adjacent sub-patterns on the second plane can be accurately collinear or equidistantly spaced, and the paper surface of fig. 17a and 17B corresponds to the second plane B.

In one embodiment, the first and second spray heads may be of different types or the same type. Preferably, the first and second heads are of the same type, and when installed, the first head (as shown in fig. 17 a) can be used as the second head by being installed in a direction opposite to 180 degrees (as shown in fig. 17 b).

Example 3

On the basis of the embodiment 1 and the embodiment 2, the technical problem that the deformation of the jet printing pattern is obvious when the moving speed of the printing stock is large in change amplitude or the moving directions are opposite can be further solved.

Referring to fig. 18a, 18B and 18c, the plane of the paper in fig. 18a corresponds to the second plane B, the plane of the paper in fig. 18B and 18c corresponds to the first plane a, the first head further includes a third a-polarity deflection electrode 25B disposed corresponding to the first B-polarity deflection electrode 24 and on the same side as the second a-polarity deflection electrode 35a, and the second head further includes a fourth a-polarity deflection electrode 35B disposed corresponding to the second B-polarity deflection electrode 34 and on the same side as the first a-polarity deflection electrode 25 a; the fourth A-polarity deflection electrode and the first A-polarity deflection electrode are arranged in front of and behind along the moving direction of the printing stock; the first a-polarity deflection electrode 25a and the fourth a-polarity deflection electrode 35b are adjacent and electrically insulated from each other, and the second a-polarity deflection electrode 35a and the third a-polarity deflection electrode 25b are adjacent and electrically insulated from each other. In an alternative embodiment, the notch of the first B-polarity deflection electrode is opposite to the notch of the second B-polarity deflection electrode, and the first B-polarity deflection electrode 24 and the second B-polarity deflection electrode 34 are in zero-resistance contact with each other. The first and fourth a-polarity deflection electrodes are arranged to control a direction of a deflection electric field of the first head, and the second and third a-polarity deflection electrodes are arranged to control a direction of a deflection electric field of the second head. In an alternative embodiment, when the first a-polarity deflection electrode and the fourth a-polarity deflection electrode are arranged to control the direction of the deflection electric field of the first nozzle, and the second a-polarity deflection electrode and the third a-polarity deflection electrode are arranged to control the direction of the deflection electric field of the second nozzle, the intersection of the projection lines of the flight trajectories of the charged ink droplets used by the first nozzle and the second nozzle to jet print the target pattern on the third plane is located on the projection line of the printing substrate printing surface on the third plane during the cooperative jet printing.

In this embodiment, for the first head, the first B-polarity deflecting electrode 24 and the second B-polarity deflecting electrode 34 constitute a B-polarity deflecting electrode of the first head, and the first a-polarity deflecting electrode 25a and the fourth a-polarity deflecting electrode 35B are arranged in such a manner that the direction of the deflecting electric field can be controlled, constitute an a-polarity deflecting electrode of the first head; in the second head, the first B-polarity deflection electrode 24 and the second B-polarity deflection electrode 34 constitute a B-polarity deflection electrode of the second head, and the second a-polarity deflection electrode 35a and the third a-polarity deflection electrode 25B are arranged so as to control the direction of the deflection electric field, and constitute an a-polarity deflection electrode of the second head. By controlling the direction of the deflection electric field, the technical problem of pattern deformation of the cooperative jet printing can be effectively solved.

The following detailed description is made with reference to the accompanying drawings.

Fig. 19 is a schematic diagram illustrating an electric field generated by a deflecting electrode of a conventional inkjet printing apparatus, and the paper surface of fig. 19 corresponds to the first plane B. Referring to fig. 1 and 2, in the inkjet printing process, the printing material may move in a single direction from left to right or from right to left, or may move back and forth from left to right, and taking the moving direction of the printing material as the right in fig. 1 as an example, because the printing material has a moving speed towards the right, in the same row of ink droplets, the later-sprayed ink droplets will fall on the left side of the earlier-sprayed ink droplets, so that the pattern obtained by spraying will deform to some extent with respect to the expected spraying effect (as shown in fig. 3), as shown in fig. 20a, the paper surface of fig. 20a corresponds to the printing surface of the printing material, and the deformation becomes more serious the faster the moving speed of the printing material is. Similarly, when the moving direction of the printing material is towards the left, due to the moving speed of the printing material towards the left, in the same row of ink drops, the ink drops printed later can fall to the right of the ink drops printed earlier, and the pattern obtained by the printing can also generate a certain degree of deformation relative to the expected printing effect. In the case of the inkjet printing in which the printing material reciprocates, in order to reduce the deformation degree of the inkjet printing effect, the moving speed of the printing material to and fro (i.e. to the right/left) can only be reduced as much as possible, for example, the moving speed of the printing material to and fro is reduced to the extent that the deformation degree of the pattern obtained by the inkjet printing is small enough to be acceptable, and the reduction of the moving speed of the printing material severely limits the production efficiency. In order to prevent the deformation of the pattern by the moving speed of the printing material, the applicant has found that the pattern deformation by the jet printing can be reduced by changing the direction of the deflection electric field formed by the negative polarity deflection electrode and the positive polarity deflection electrode by mechanically operating the negative polarity deflection electrode and the positive polarity deflection electrode according to the rated speed of the printing material, thereby presetting the included angle between the direction of the deflection electric field and the moving direction of the printing material to a specific angle. The applicant has further found in tests that when there is a large deviation between the moving speed of the substrate and the rated speed, the deformation of the printed pattern is still significant, and specifically, when the moving speed of the substrate is smaller than the rated speed and there is a large deviation, in the same row of ink droplets, the later ink droplets will fall on the same side of the first ink droplets as the moving direction of the substrate, resulting in significant deformation of the printed pattern; when the moving speed of the printing stock is larger than the rated speed and has larger deviation, in the same row of ink drops, the ink drop printed later can fall on the side of the ink drop printed earlier, which is opposite to the moving direction of the printing stock, so that the deformation of the printed pattern is obvious. Fig. 20a and 20b show examples of the above case, and when the moving speed of the printing material does not have a large deviation from the rated speed, the pattern of the jet printing is not deformed or is not obviously deformed, as shown in fig. 20b, the paper surface of fig. 20b corresponds to the printing surface of the printing material; when the moving speed of the printing material is lower than the rated speed and there is a large deviation, the ink drop printed later falls on the right side of the ink drop printed earlier in the same row of ink drops, so that the printed pattern is deformed obviously, as shown in fig. 20 a. It can be seen that, in the mode that the directions of the deflection electric fields formed by the negative polarity deflection electrodes and the positive polarity deflection electrodes are changed by mechanically adjusting the negative polarity deflection electrodes and the positive polarity deflection electrodes according to the rated speed of the printing stock, the patterns sprayed and printed cannot be deformed or are not obviously deformed when the moving speed of the printing stock does not have a large deviation from the rated speed, but the patterns sprayed and printed are obviously deformed when the moving speed of the printing stock has a large deviation from the rated speed. In order to solve the above technical problems, the applicant has analyzed the deflection electrode of the inkjet printing device and found that the deflection electrode of the conventional inkjet printing device is composed of a positive electrode and a negative electrode, and the direction of the electric field formed by the deflection electrode cannot be controlled by changing the voltage on the electrode.

The great or moving direction of the displacement velocity variation amplitude of solving the stock can lead to spouting the obvious technical problem of seal pattern deformation when opposite, the embodiment of the utility model provides a spout a yard device and combination shower nozzle, further carry out real-time automatic control and do not carry out mechanical control to the deflection electrode through the electric field direction to the deflection electrode, can solve the great or moving direction of the displacement velocity variation amplitude of stock and lead to spouting the obvious technical problem of seal pattern deformation when opposite, can refer to fig. 18c and show.

To further illustrate how to solve the technical problem of the apparent deformation of the printed pattern, referring to fig. 21, 22a and 22b, each of the first and second heads includes: the a-polarity deflection electrode 14 and the B-polarity deflection electrode 15, the a-polarity and the B-polarity being opposite electrical polarities to each other. It is understood that when the polarity of a is positive, the polarity of B is negative; when the polarity of A is negative, the polarity of B is positive. Fig. 22a to 26d are schematic views given in a direction looking down from above in fig. 21, the paper surface of fig. 22a to 26d corresponding to the first plane a.

The a-polarity deflection electrode 14 is disposed opposite to the B-polarity deflection electrode 15. In one embodiment, the a-polarity deflection electrodes 14 and the B-polarity deflection electrodes 15 are arranged parallel to each other. The surface of the a-polarity deflection electrode 14 facing the B-polarity deflection electrode 15 is a first surface, and the surface of the B-polarity deflection electrode 15 facing the a-polarity deflection electrode 14 is a second surface. When voltages corresponding to the electric polarities are applied to the a-polarity deflection electrode 14 and the B-polarity deflection electrode 15, a deflection electric field of a deflection electrode of the code spraying device is formed in a region between the first surface of the a-polarity deflection electrode 14 and the second surface of the B-polarity deflection electrode 15. Fig. 21 gives an example in which the a-polarity deflection electrode 14 is a positive-polarity deflection electrode, the B-polarity deflection electrode 15 is a negative-polarity deflection electrode, and an example in which the a-polarity deflection electrode 14 and the B-polarity deflection electrode 15 are arranged in parallel with each other. Corresponding to the structure of the first head shown in fig. 18c, the B-polarity deflection electrode 15 in fig. 21 corresponds to the first and second B-

polarity deflection electrodes

24 and 34 in fig. 18c, and the a-polarity deflection electrode 14 in fig. 21 corresponds to the first and fourth a-polarity deflection electrodes 25a and 35B in fig. 18 c; corresponding to the structure of the second head shown in fig. 18c, the B-polarity deflecting electrode 15 in fig. 21 corresponds to the first B-polarity deflecting electrode 24 and the second B-polarity deflecting electrode 34 in fig. 18c, and the a-polarity deflecting electrode 14 in fig. 21 corresponds to the second a-polarity deflecting electrode 35a and the third a-polarity deflecting electrode 25B in fig. 18 c.

Wherein the A-polarity deflection electrode comprises two A-polarity electrodes electrically insulated from each other, arranged in such a manner that a deflection direction of the deflection electric field is controllable. In the case shown in fig. 18c, one of the two a-polarity electrodes electrically insulated from each other of the first head is the first a-polarity deflection electrode 25a, the other is the fourth a-polarity deflection electrode 35b of the second head, one of the two a-polarity electrodes electrically insulated from each other of the second head is the second a-polarity deflection electrode 35a, and the other is the second a-polarity deflection electrode 25b of the first head. The two A polarity electrodes are arranged along the moving direction of the printing stock when the code spraying device works. In the schematic diagram shown in fig. 21, the substrate moving direction is the horizontal direction (fig. 21 further shows an example of the horizontal direction, it is understood that the substrate moving direction may also be the horizontal left or left and right reciprocating motion), then in the case shown in fig. 21, the two a-polarity electrodes are arranged along the horizontal direction, it is understood that if the substrate moving direction is the vertical direction, at least two a-polarity electrodes of the two a-polarity electrodes are arranged along the vertical direction back and forth. In the schematic diagram shown in fig. 21, the a-polarity deflection electrode 14 includes two a-polarity electrodes, and the first a-polarity electrode 141 and the second a-polarity electrode 142 are electrically insulated from each other, arranged in the front-rear direction in the substrate moving direction, and parallel to the B-polarity deflection electrode 15.

When voltages with corresponding electric polarities are respectively applied to the two A-polarity electrodes and the B-polarity deflection electrode, an electric field for each A-polarity electrode is formed in the area between the first surface of each A-polarity electrode in the two A-polarity electrodes and the second surface of each B-polarity deflection electrode, and all the electric fields for each A-polarity electrode are superposed to form a deflection electric field of the deflection electrode of the code spraying device. The deflection direction of the deflection electric field can be controlled by the following modes: and controlling the deflection direction of the deflection electric field by adjusting the voltage applied to the two A-polarity electrodes. In the schematic diagram shown in fig. 21, a first deflection electric field for the first polarity electrode 141 is formed between the first surface of the first a-polarity electrode 141 and the second surface of the B-polarity deflection electrode 15, a second deflection electric field for the second polarity electrode 142 is formed between the first surface of the second polarity electrode 142 and the second surface of the B-polarity deflection electrode 15, and the first deflection electric field for the first polarity electrode 141 and the second deflection electric field for the second polarity electrode 142 are superimposed to form a deflection electric field of the inkjet printing device deflection electrode.

The voltage applied to the two electrodes with the polarity a may be the voltage applied to one electrode with the polarity a of the two electrodes with the polarity a, or the voltage applied to the two electrodes with the polarity a. For example, in the schematic diagram shown in fig. 21, the voltages applied to the first a-polarity electrodes 141 or the second a-polarity electrodes 142 may be adjusted to control the deflection direction of the deflection electric field, or the voltages applied to the first a-polarity electrodes 141 and the second a-polarity electrodes 142 may be adjusted to control the deflection direction of the deflection electric field.

In an alternative embodiment, the first and fourth a-polarity deflection electrodes are arranged to control a direction of a deflection electric field of the first head, and the second and third a-polarity deflection electrodes are arranged to control a direction of a deflection electric field of the second head.

The embodiment of the utility model provides a spout a yard device deflection electrode, through right the voltage of applying on two A polarity electrodes carries out real-time automatic adjustment to can real-time automatic control deflect the direction of deflecting of electric field.

The working principle of the combined nozzle proposed in this embodiment will be described as an example. Continuing with fig. 18c, taking the first showerhead as an example, assuming that the a polarity is positive,the B polarity is negative, the first B polarity deflection electrode 24 and the second B polarity deflection electrode 34 are in zero resistance contact to form the B polarity deflection electrode of the first nozzle, and the applied negative voltage is '-V'; the first A-polarity deflection electrode 25a and the fourth A-polarity deflection electrode 35b are electrically insulated from each other to constitute the A-polarity deflection electrode of the first head, and the first positive voltage applied to the first A-polarity deflection electrode 25a is "+ V₁", the second positive voltage applied to the fourth a-polarity deflection electrode 35b is" + V₂", wherein a first deflecting electric field T is formed between a first surface of the first A-polarity deflecting electrode 25a and a second surface of the B-polarity deflecting electrode of the first showerhead₁As shown in fig. 22 a; a second deflecting electric field T is formed between the first surface of the fourth A-polarity deflecting electrode 35B and the second surface of the B-polarity deflecting electrode of the first head₂As shown in fig. 22 b. First deflection electric field T₁And a second deflecting electric field T₂A deflection electric field T of a deflection electrode of the code spraying device is formed by superposition, and the direction of the deflection electric field T depends on the first deflection electric field T₁And a second deflecting electric field T₂The relative strength therebetween. When the first deflecting electric field T₁And a second deflecting electric field T₂When the intensity of the deflection electric field T is equal, the direction of the deflection electric field T is parallel to the central axis direction of the electrode "-V", as shown in fig. 23; when the first deflecting electric field T₁Is stronger than the second deflection electric field T₂At the intensity of (2), the direction of the deflecting electric field T is the same as that of the first deflecting electric field T₁The same direction of deflection, as shown in fig. 24; when the second deflecting electric field T₂Is stronger than the first deflection electric field T₁At the intensity of (2), the direction of the deflecting electric field T appears in the same direction as the second deflecting electric field T₂The same direction of deflection, as shown in fig. 25.

Further, the voltage "+ V applied to the first A-polarity deflection electrode 25a may be changed₁"and/or the voltage" + V applied to the fourth A-polarity deflection electrode 35b₂"to achieve control of the deflection direction of the deflecting electric field T. The voltage "+ V applied to the first A-polarity deflection electrode 25a₁"with the voltage applied to the fourth a-polarity deflection electrode 35 b" + V₂"the larger the potential difference value is, the larger the deflection angle of the deflecting electric field T is;the voltage "+ V applied to the first A-polarity deflection electrode 25a₁"with the voltage applied to the fourth a-polarity deflection electrode 35 b" + V₂"the smaller the potential difference value is, the smaller the deflection angle of the deflecting electric field T is. The deflection direction of the deflecting electric field T can eliminate the deformation of the jet printing pattern caused by the change of the moving speed of the printing stock. For example, when the moving speed of the printing material is less than the rated speed, as shown in fig. 20a, the embodiment of the present invention compensates the possible deformation of the jet printing pattern by adjusting the deflection direction of the deflection electric field, for example, using the deflection electric field shown in fig. 25; similarly, when the moving speed of the printing material is greater than the rated speed, the embodiment of the present invention may compensate the possible deformation of the jet printing pattern by using the deflection electric field shown in fig. 24.

In practical applications, it is only necessary to control the voltage "+ V applied to the first A-polarity deflection electrode 25a₁"with the voltage applied to the fourth a-polarity deflection electrode 35 b" + V₂"can easily control the deflection direction of the deflecting electric field T. It is understood that, in one embodiment, when the polarity a is negative and the polarity B is positive, the embodiments can be implemented with reference to the above embodiments, and those skilled in the art can clearly understand the implementation manner of the embodiments according to the above description.

The embodiment of the utility model provides a spout a yard device deflection electrode has changed two piece current positive negative electrode composition deflection electrode's compound mode, and the homopolar electrode of every shower nozzle can be pressed the controllable mode of the direction of deflection of electric field is arranged, and then can control the direction of deflection of electric field through the voltage that control was exerted on each homopolar electrode, and need not carry out any mechanical control to the electrode, and it is the electric field direction wherein to take place to deflect, and not electrode itself.

The inkjet printing apparatus in this embodiment may further include a speed sensor (not shown) and a processor (not shown), where the speed sensor is used to obtain the moving speed of the printing material 17 located below the nozzle in real time. The processor is connected to a speed sensor which adjusts the voltage applied to the electrodes based on the speed of movement of the substrate 17 acquired in real time by the speed sensor. In an embodiment, the adjusting the voltage applied to the electrodes based on the moving speed of the substrate 17 acquired by the speed sensor in real time includes: calculating a deflection angle of a deflection electric field T to be compensated in real time based on the moving speed of the printing stock 17 acquired in real time; calculating a potential difference value based on a deflection angle needing to be compensated by the deflection electric field T calculated in real time; and adjusting the voltage applied across the electrodes based on the calculated potential difference value. The electrodes are used for controlling the deflection electric field, and may be the first a-polarity deflection electrode 25a and/or the fourth a-polarity deflection electrode 35b, the second a-polarity deflection electrode 35a and/or the third a-polarity deflection electrode 25b shown in fig. 18 c.

The speed of movement of the substrate 17 here includes the rate of movement of the substrate and in some applications also the direction of movement of the substrate.

In one embodiment, the speed sensor comprises an encoder by which real time data of the speed of movement of the substrate 17 can be acquired.

The embodiment of the utility model provides a can lead to spouting when the moving speed variation amplitude of stock that will solve is great to print the obvious technical problem of pattern deformation, the embodiment of the utility model provides a deflection direction through the control electric field that deflects can compensate the probably deflection of the pattern of spouting of printing that stock moving speed leads to even make when stock moving speed takes place great amplitude variation, spout the pattern of printing and also can not take place obvious deformation. For example, in the case shown in fig. 20a, since the moving speed of the printing material is less than the rated speed and there is a large deviation, the ink drop printed later will fall on the right side of the ink drop printed earlier in the same row of ink drops, so that the deformation of the printed pattern is obvious, for this case, the deflection electrode provided by the embodiment of the present invention can control the deflection direction of the deflection electric field to compensate the possible deformation of the printed pattern, for example, the deflection direction of the deflection electric field shown in fig. 25 is used to compensate the possible deformation of the printed pattern; similarly, when the moving speed of stock is greater than rated speed and there is great deviation, lead to in the ink droplet of same row, the ink droplet of later spouting the seal can fall on the one side opposite with the moving direction of stock of the ink droplet of spouting the seal earlier for the pattern deformation of spouting the seal is obvious, and to this kind of condition, the utility model discloses the deflection electrode that the embodiment provided can control the deflection direction of deflecting electric field and compensate in order to spouting the possible deflection of seal pattern, can adopt the deflection direction of the deflection electric field that fig. 24 shows for example to compensate the possible deflection of spouting the seal pattern.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. 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

1. A combined nozzle of a code spraying device is characterized by comprising a first nozzle and a second nozzle which can work simultaneously, wherein the direction of a deflection electric field of the first nozzle is opposite to that of a deflection electric field of the second nozzle, and when a target pattern is sprayed and printed cooperatively, the intersection point of projection lines of flight paths of charged ink drops of the first nozzle and the second nozzle, which are used for spraying and printing the target pattern, on a third plane is positioned on the projection line of a printing bearing surface of a printing stock on the third plane, so that each spraying and printing column forming the target pattern can be finished simultaneously, wherein the third plane is perpendicular to the first plane and perpendicular to the second plane; the first plane is parallel to the printing surface, and the second plane is perpendicular to the moving direction of the printing stock.

2. The composite spray head of claim 1, wherein the first spray head and the second spray head are identical in structure and size, and are arranged in a 180 ° opposite direction and in tandem along the direction of movement of the substrate.

3. The combined spray head of claim 1, wherein the first spray head and the second spray head are arranged in tandem along the moving direction of the printing material;

the A polarity and the B polarity are mutually opposite polarities;

4. The composite showerhead of claim 3, wherein the first showerhead further comprises a first recovery groove, the second showerhead further comprises a second recovery groove, the first B-polarity deflection electrode is formed with a notch along a direction of a line of the first showerhead, the first recovery groove is disposed corresponding to the notch of the first B-polarity deflection electrode; the second B-polarity deflection electrode is formed with a notch along the ink line direction of the second head, and the second recovery tank is disposed corresponding to the notch of the second B-polarity deflection electrode.

5. The showerhead of claim 4, wherein the first B-polarity deflection electrode has a notch in the form of an elongated notch with a narrow top and a wide bottom projected on the second plane, and the second B-polarity deflection electrode has a notch in the form of an elongated notch with a narrow top and a wide bottom projected on the second plane.

6. The composite showerhead of claim 3, wherein the first showerhead further comprises a third A-polarity deflection electrode disposed corresponding to the first B-polarity deflection electrode on the same side as the second A-polarity deflection electrode, the third A-polarity deflection electrode and the second A-polarity deflection electrode being disposed one behind the other in the direction of movement of the substrate; the second nozzle further comprises a fourth A-polarity deflection electrode, the fourth A-polarity deflection electrode and the second B-polarity deflection electrode are arranged correspondingly and are positioned on the same side of the first A-polarity deflection electrode, and the fourth A-polarity deflection electrode and the first A-polarity deflection electrode are arranged in a front-back mode along the moving direction of the printing stock;

7. The composite showerhead of claim 4 or 5, wherein the notch of the first B-polarity deflection electrode is opposite to the notch of the second B-polarity deflection electrode, and the first B-polarity deflection electrode and the second B-polarity deflection electrode are in zero-resistance contact with each other.

8. The composite head of claim 1, 3 or 6 wherein the flight trajectories of the charged ink droplets of the first and second heads are collinear or equally spaced at adjacent projected boundaries on the second plane, and the areas within the projected boundaries do not coincide with each other; the projection boundary of the flying locus of the charged ink drop on the second plane is a straight line part of the flying locus of the charged ink drop with the minimum deflection amplitude below the deflection electric field or a straight line part of the flying locus of the charged ink drop with the maximum deflection amplitude below the deflection electric field.

9. The composite spray head according to claim 8, wherein projections of virtual ejection points of the first spray head and the second spray head on a second plane coincide;

10. The composite showerhead of claim 6, wherein the first and fourth a-polarity deflection electrodes are arranged to control a direction of a deflection electric field of the first showerhead, and the second and third a-polarity deflection electrodes are arranged to control a direction of a deflection electric field of the second showerhead.

11. A code spraying device, which comprises the combined spray head and control part as claimed in any one of claims 1 to 10, wherein the control part divides the pattern to be sprayed on the printing surface of the printing stock along the moving direction of the printing stock to obtain the sub-pattern to be sprayed, and distributes the corresponding sub-pattern to be sprayed to the first spray head and the second spray head; the first and second heads jet-print the distributed sub-patterns under the control of the control section.