CN115431514A - A device for realizing ink mixing electrojet printing - Google Patents

Abstract

The invention belongs to the field of advanced manufacturing technology, and provides a device for realizing ink mixing electrojet printing, which realizes high mixing during ink transportation and forms a stable jet flow. The ink solution first passes through the annular flow sensor, then is sucked into the precision delivery pipe, and then sent to the toothed tube mixer, which flows through the toothed blades and arc splitter blades of the toothed tube mixer, and the ink solution is initially mixed. Through the control of the valve, it enters the spiral tubular mixer, and uses the self-generated centrifugal force field of the flowing liquid in the curved pipe to realize the further mixing of the ink solution. Finally, the mixed ink is printed by EFI. The electrojet printing device has the advantages of simple structure, low cost, and not easy to block needles.

Description

A device for realizing ink mixing electrojet printing

technical field

The invention belongs to the field of advanced manufacturing technology, and relates to a device for realizing ink mixing electrojet printing.

Background technique

With the development of micro-nano technology, micro-nano products are gradually popularized in daily life, affecting and changing people's lives. As the requirements for micro-nano products continue to increase, printing technology has played an important role in the field of micro-nano manufacturing due to its unique advantages. However, at present, R&D personnel pay more attention to the research of new mechanisms and new methods, and pay less attention to ink transportation in the printing process. But the ink solution delivery process cannot be ignored either, it is crucial to the printing quality. In the traditional electrojet printing process, the ink solution is directly transported from the delivery tube to the nozzle. In the process of transporting the ink solution from the storage container to the spray needle, it needs to flow through a long delivery pipe. Due to objective factors such as density, gravity, particle surface tension, etc., the ink solution will inevitably produce agglomeration and precipitation in the delivery pipe. Uniform ink solution, the number of particles contained in a unit volume is not uniform, and the number of particles contained in a unit volume is not equal, which will cause the same volume of nano solution to be subjected to different electric field forces in the electric field, which will induce unstable jet flow and cause printing lines. Problems such as uneven width and large fluctuations in dielectric constant cause low performance of printed micro-nano structures and devices.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned technologies, and to invent a device for realizing ink mixing electrojet printing. First, the ink solution stored in the sealed storage tank is sucked into the delivery pipe through the transmission pump. Before the ink solution flows into the delivery pipe, it first passes through the annular flow sensor. The annular flow sensor detects the flow of the ink solution in the delivery pipe. After the data is fed back, the flow of the ink solution is controlled by the transmission pump in time to maintain the stability and uniformity of the EFI printing. Then the conveying pipe transports the ink solution to the toothed tubular mixer. When flowing through the toothed blades of the toothed tubular mixer, the ink solution and the toothed blades form an impact, and the ink formed after the first step of transportation is initially mixed. The aqueous solution settles, and then flows through the arc-shaped splitter blades, which divide the water flow into left and right streams. The left water flow surrounds the left-hand arc-shaped splitter blades, forming a counterclockwise water flow, along the smooth arc-shaped partition in the lower part. When the plate flows down, the water flow on the right surrounds the arc-shaped splitter blade on the right to form a clockwise water flow, flows down along the smooth arc-shaped partition in the lower part, counteracts and mixes with the counterclockwise water flow on the left, and then flows through the toothed tube shape The toothed blade at the lower end of the mixer flows out of two toothed mixer outlets. The two toothed mixer outlets divide the water flow into two streams. One flows through the toothed mixer outlet with a valve and enters the spiral mixer horizontally. Another unimpeded flow passes through the outlet of the toothed mixer without a valve, and flows into the spiral mixer vertically, forming two streams of water with different speeds. In the spiral tube mixer, the centrifugal force generated by the flowing liquid in the curved pipe is used The field generates a secondary flow to further mix the ink solution evenly. Finally, the conductive nozzle fixture and the cavity nozzle move to a suitable position on the Z axis, forming a certain height with the substrate, and turn on the variable power supply to generate a voltage ranging from tens of volts to several thousand volts according to the demand. The voltage is passed through the conductive nozzle. The needle fixture makes an electric field form between the outer surface of the cavity needle and the substrate, so that the ink solution is charged and attracts each other with the moving substrate connected to the ground to form a stable nano-jet. As required, the moving substrate and the substrate move in the plane , accept the ejected nano-jet, and finally print the finished product on the substrate. The device of the invention has the advantages of simple structure, low cost and the like.

The delivery monitoring module includes a sealed storage tank, an ink solution, an annular flow sensor, a precision delivery tube, and a transmission pump; the sealed storage tank is used to store the ink solution and is connected to the precision delivery tube; the delivery pump Power is provided to the ink solution, and a certain amount of ink solution is sucked into the precision delivery pipe through the annular flow sensor; the annular flow sensor is fixed on the outer ring of the precision delivery tube and placed in front of the transfer pump. Above the tank, 10cm to 100cm away from the port of the sealed storage tank; after the ink solution is sucked into the precision delivery pipe from the sealed storage tank, it first flows through the annular flow sensor, and then flows through the transfer pump;

The tubular mixer module includes a toothed tubular mixer, a toothed blade, an arc splitter blade, a valve, a toothed mixer outlet I, a toothed mixer outlet II, a spiral mixer inlet I, a spiral mixing Inlet II, spiral tubular mixer, cavity spray needle; the toothed tubular mixer is composed of toothed blades and arc-shaped splitter blades, and the toothed blades are located at the upper and lower ends of the toothed tubular mixer. The arc-shaped splitter blade is located in the middle of the toothed tubular mixer; the lower end of the toothed tubular mixer is provided with a toothed mixer outlet I and a toothed mixer outlet II, which are connected with the spiral tubular mixer; The toothed blades are evenly distributed at the upper and lower ends of the toothed tubular mixer, and a toothed blade contained on the left side and a toothed blade contained on the right side together form a unit; In the middle part of the tubular mixer, between the upper and lower parts of the toothed blades, the upper part is connected by two symmetrical three-quarter circles, and the lower part is composed of two smooth arc-shaped partitions; the said The valve is installed at the outlet I of the toothed mixer and connected to the inlet I of the spiral mixer; the outlet II of the toothed mixer is directly connected to the inlet II of the spiral mixer without any obstruction device; the spiral tube type The upper end of the mixer includes a horizontal spiral mixer inlet I, a vertical spiral mixer inlet II, the main channel section of the spiral tubular mixer is elliptical, and a section of Z-shaped spiral tubular mixer is a unit ;

The printing movement module includes a variable power supply, a Z-direction moving axis, a conductive needle fixture, a jet, a substrate, and a moving substrate; the variable power supply can form tens of volts to several thousand volts according to demand voltage, through the conductive needle fixture, an electric field is formed between the outer surface of the cavity needle and the substrate to form a stable jet; the Z-direction moving axis is connected with the conductive needle fixture, so that the conductive needle fixture and the cavity The needle moves smoothly on the Z-axis; the conductive needle fixture is located in the middle of the cavity needle, connecting the cavity needle with the Z-direction moving axis; the moving substrate is closely attached to the ground below the substrate, Move back and forth, left and right, so that the jet prints different shapes on the substrate;

In order to solve the above technical problems, a device for realizing ink mixing electrojet printing provided by the present invention is used for implementation, and the steps are as follows:

In the first step, the ink solution is sent to the tubular mixer

The ink solution is stored in a sealed storage tank, and the transmission pump provides power so that a certain amount of ink solution is sucked into the precision delivery tube. Before the ink solution flows into the precision delivery tube, it passes through the annular flow sensor, which detects the flow rate in the precision delivery tube. The flow rate of the ink solution, after the data is fed back, the flow rate of the ink solution is controlled by the transmission pump in time, so as to avoid the clogging of too much solution in the precision delivery tube or the flow instability due to too little solution, and maintain the stability and uniformity of EFI printing;

In the second step, use the toothed tube mixer and the spiral mixer to fully mix the ink solution during the delivery process

The precision delivery tube transports the ink solution to the toothed tubular mixer, firstly flows through the toothed blades of the upper 3 cells of the toothed tubular mixer, the ink solution and the toothed blades form an impact, and the preliminary mixing is transported through the first step The resulting ink solution settles, and then flows through the arc-shaped splitter blades, which divide the water flow into left and right streams, and the left water flow surrounds the left-hand arc-shaped splitter blades, forming a counterclockwise water flow, smooth along the lower half The curved partition on the right flows down, and the water flow on the right surrounds the curved splitter vane on the right, forming a clockwise water flow, flowing down the smooth curved partition in the lower part, counteracting and mixing with the counterclockwise water flow on the left, and then flows through The toothed blades of the 3 cells at the lower end of the toothed tubular mixer are ready to flow out of the toothed tubular mixer. When flowing out, they pass through toothed mixer outlet I and toothed mixer outlet II, and The outlet II of the shaped mixer divides the water flow into two streams, one flows through the outlet I of the toothed mixer, and there is a valve on the outlet I of the toothed mixer, and the size of the valve can be adjusted according to needs to adapt to different types of ink solutions to form different flow rates The ink solution enters the spiral mixer inlet I horizontally, the other flows through the toothed mixer outlet II, and flows into the spiral mixer inlet II unimpeded vertically, and two streams flow through the toothed mixer outlet I restricts the flow through the valve, and flows through the toothed mixer outlet II unimpeded, and finally forms two streams of water with different speeds, which merge into the spiral tubular mixer, and two streams of water with different speeds produced by the same ink solution flow through The spiral tube mixer with 4 cells uses the self-generated centrifugal force field of the flowing liquid in the curved pipe to generate a secondary flow in the spiral tube mixer to achieve further mixing of the ink solution;

The third step is to print the finished product with the mixed ink solution

The conductive needle fixture and the cavity needle move to a suitable position on the Z axis, forming a certain height with the substrate, turning on the variable power supply, and generating a voltage ranging from tens of volts to several thousand volts according to the demand, and the voltage passes through the conductive needle The fixture makes an electric field form between the outer surface of the cavity needle and the substrate, so that the ink solution is charged and attracts the moving substrate connected to the ground to form a stable nano-jet. According to the need, the moving substrate and the substrate move in the plane , accept the ejected nano-jet, and finally print the finished product on the substrate.

The beneficial effects of the present invention are: a device for realizing ink mixing electrojet printing, which realizes highly mixed ink solution and forms a stable jet. First, the ink solution stored in the sealed storage tank is powered by the transfer pump, and a certain amount of ink solution is first passed through the annular flow sensor, and then sucked into the precision delivery tube. Then the delivery pipe transports the ink solution to the toothed tube mixer, and flows through the toothed blades and arc-shaped splitter blades of the toothed tube mixer. The ink solution is initially mixed, and then two streams are formed, which are controlled by valves so that The water flow at different speeds enters the helical tubular mixer. In the helical tubular mixer, the self-generated centrifugal force field of the flowing liquid in the curved pipeline is used to generate a secondary flow, so that the ink solution can be further mixed evenly. Finally, the conductive needle fixture and the cavity needle move to the proper position on the Z-axis, turn on the variable power supply, add voltage, form a stable nano-jet, and finally print the finished product on the substrate. The annular flow sensor can detect the flow of the ink solution in the delivery pipe, and control the flow of the ink solution through the delivery pump in time to maintain the stability and uniformity of the EFI printing; the toothed blades in the toothed tube mixer make the ink solution and the teeth The curved blade forms an impact, and the arc-shaped splitter blade divides the water flow into two left and right water flows with different rotation directions. The two water flows are opposed, further mixed evenly, and finally form a stable jet and print the finished product. The electrojet printing device has the advantages of simple structure, remarkable effect, good mixing effect and the like.

Description of drawings

Fig. 1 is a schematic diagram of an apparatus for realizing ink mixing electrojet printing in an embodiment of the present invention.

Fig. 2 is a schematic diagram of the toothed tube mixer device in the embodiment of the present invention.

Fig. 3 is a schematic diagram of a helical tubular mixer device in an embodiment of the present invention.

In the figure: 1 sealed storage tank, 2 ink solution, 3 annular flow sensor, 4 precision delivery pipe, 5 transfer pump, 6 toothed tubular mixer, 7 toothed blade, 8 arc splitter blade, 9 variable power supply, 10 Valve, 11 Tooth mixer outlet I, 12 Tooth mixer outlet II, 13 Helical mixer inlet I, 14 Helical mixer inlet II, 15 Helical tubular mixer, 16 Z-direction moving shaft, 17 Spiral tubular mixer, 18 cavity needles, 19 nano jets, 20 substrates, 21 moving substrates.

detailed description

The specific implementation manners of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings. See Figures 1 to 3.

This embodiment discloses a device for realizing ink mixing electrojet printing. The device mainly includes three parts: a conveying monitoring module, a tubular mixer module, and a jet printing movement module. First, the ink solution stored in the sealed storage tank is powered by the transfer pump through the annular flow sensor, and then sucked into the delivery pipe; then the delivery pipe transports the ink solution to the toothed tubular mixer, and flows through the toothed The tooth-shaped blades and arc-shaped splitter blades of the tubular mixer, the ink solution is initially mixed, and then two streams of water are formed, which are controlled by valves, so that the water flows at different speeds enter the spiral tubular mixer, and the liquid flowing in the curved pipeline is used. The self-generated centrifugal force field generates a secondary flow to achieve further uniform mixing of the ink solution; finally, the conductive nozzle fixture and the cavity nozzle move to a suitable position on the Z-axis, the variable power supply is turned on, and the voltage is added to form a stable nano-jet. Print the finished product on the substrate.

Specifically, in this example, the delivery monitoring module includes a sealed storage tank 1, an ink solution 2, an annular flow sensor 3, a precision delivery tube 4, and a transfer pump 5; the tubular mixer module includes a toothed tube Type mixer 6, toothed blade 7, arc splitter blade 8, valve 10, toothed mixer outlet I11, toothed mixer outlet II12, spiral mixer inlet I13, spiral mixer inlet II14, spiral tube Type mixer 15, cavity nozzle 18; the jet printing movement module includes variable power supply 9, Z-direction moving shaft 16, conductive nozzle fixture 17, nano-jet 19, substrate 20, and moving substrate 21. The annular flow sensor 3 is fixed on the outer ring of the precision delivery pipe 4, placed in front of the delivery pump 5, close to the sealed storage tank 1, and detects the flow of the ink solution 2 sucked by the delivery pump 5 at 20-30 cm. The airtight storage tank 1 is made of materials such as glass and plastic, is connected with the precision delivery pipe 4, and is sealed with kerosene to isolate air. The toothed tubular mixer 6 is mainly composed of the upper and lower parts of the toothed blade 7 and the middle arc splitter blade 8, the lower end is provided with the toothed mixer outlet I11, the toothed mixer outlet II12, and the spiral tube type Mixer 15 is connected. The upper end of the spiral tubular mixer 15 includes a horizontal spiral mixer inlet I13 and a vertical spiral mixer inlet II14. The main channel section of the spiral tubular mixer 15 is elliptical, and the long and short radii of the ellipse are respectively 12.5mm, 8mm, the pitch of the helical tubular mixer 15 is 30mm, a section of Z-shaped helical tubular mixer 15 is a unit, a total of four units.

In this embodiment, a device for realizing ink mixing electrojet printing is used for implementation, and the specific steps are as follows:

In the first step, the ink solution is sent to the tubular mixer

The ink solution 2 is stored in a sealed storage tank 1 with a capacity of 10-25 L, and the transfer pump 5 provides power so that the ink solution 2 is sucked into the precision delivery tube 4 at a flow rate of 5-25 L, and the ink solution 2 flows into the precision delivery tube 4 Before this, the annular flow sensor 3 first detects that the flow rate of the ink solution 2 in the precision delivery tube 4 cannot be greater than 25ml/s and not less than 5ml/s. If it exceeds this range, the flow of the ink solution 2 is controlled by the transfer pump 5 in time to avoid the flow of the precision delivery tube. 4. If there is too much solution to block or too little to cause unstable flow, keep the stability and uniformity of EFI printing;

In the second step, use the toothed tube mixer and the spiral mixer to fully mix the ink solution during the delivery process

The precision delivery tube 4 transports the ink solution 2 to the toothed tubular mixer 6, and first flows through the toothed tubular mixer 6 with a length of 225mm to 495mm and a width of 60 to 90mm. shaped blade 7, the ink solution 2 and the toothed blade 7 form an impact, the ink solution 2 precipitates after the initial mixing and transportation in the first step, and then flows through the arc-shaped splitter blade 8 with an arc radius of 25mm to 40mm, and the arc-shaped splitter blade 8 Divide the water flow into left and right two streams, the water flow on the left surrounds the arc-shaped splitter blade 8 on the left to form a counterclockwise water flow, flows down the smooth arc-shaped partition in the lower part, and the water flow on the right surrounds the arc-shaped shunt on the right The blade 8 forms a clockwise water flow, flows down along the smooth arc-shaped partition in the lower part, counterclocks and mixes with the counterclockwise water flow on the left, and then flows through 3 units at the lower end of the toothed tube mixer 6 with an interval of 30mm to 75mm The toothed blade 7 is ready to flow out of the toothed tubular mixer 6. When flowing out, the toothed mixer outlet I11 with a cross-sectional radius of 15-25 mm and the toothed mixer outlet II12 with a cross-sectional radius of 15-25 mm divide the water flow into There are two streams, one of which flows through the outlet I11 of the toothed mixer, and the outlet I11 of the toothed mixer has a valve 10, which can be adapted to different types of ink solutions by adjusting the size of the valve 10 to form a flow rate of 2 to 15ml/s. Ink solution 2, horizontally enters the inlet I13 of the spiral mixer, the other flows through the outlet II12 of the toothed mixer, and flows into the inlet II14 of the spiral mixer vertically without hindrance, two streams flow through the outlet of the toothed mixer I11 restricts the flow through the valve 10, flows through the outlet II12 of the toothed mixer without hindrance, finally forms water flows of 2-15ml/s and 5-25ml/s respectively, and merges into the spiral tubular mixer 17, the same ink solution 2. Two kinds of water flows with different speeds flow through 4 cells, each cell is 60-90mm long in the helical tubular mixer 17. The centrifugal force field generates a secondary flow to achieve further mixing of the ink solution 2;

The third step is to print the finished product with the mixed ink solution

The conductive needle fixture 17 and the cavity needle 18 move on the Z axis to form a height of 100mm to 300mm from the substrate 20, and the variable power supply 9 is turned on to generate a voltage ranging from 30V to 3000V according to the demand, and the voltage passes through the conductive needle fixture 17, an electric field is formed between the outer surface of the cavity nozzle 18 and the substrate 20, so that the ink solution 2 is charged and attracted to the moving substrate 21 connected to the ground to form a stable nano-jet 19. As required, the moving substrate 21 together with The substrate 20 moves in a plane, accepts the ejected nano-jet 19 , and finally prints the finished product on the substrate 20 .

Claims (1)

1. A device for realizing ink mixing electrojet printing, comprising a delivery monitoring module, a tubular mixer module, and a jet printing movement module; it is characterized in that the delivery monitoring module includes a sealed storage tank (1), ink aqueous solution (2), annular flow sensor (3), precision delivery pipe (4), transfer pump (5); ) are connected; the transfer pump (5) provides power to the ink solution (2), and the ink solution (2) of a certain demand is first passed through the annular flow sensor (3), and then sucked into the precision delivery pipe (4); The annular flow sensor (3) is fixed on the outer ring of the precision delivery pipe (4), placed in front of the transfer pump (5), and the annular flow sensor (3) is located above the sealed storage tank (1), at a distance from the sealed storage tank (1) ) port 10cm-100cm; the ink solution (2) is sucked from the sealed storage tank (1) into the precision delivery pipe (4), first flows through the annular flow sensor (3), and then flows through the delivery pump (5); The tubular mixer module includes a toothed tubular mixer (6), a toothed blade (7), an arc splitter blade (8), a valve (10), a toothed mixer outlet I (11), a toothed Mixer outlet II (12), spiral mixer inlet I (13), spiral mixer inlet II (14), spiral tubular mixer (15), cavity spray needle (18); The tubular mixer (6) is composed of toothed blades (7) and arc-shaped splitter blades (8), the toothed blades (7) are located at the upper and lower ends of the toothed tubular mixer (6), and the arc-shaped splitter blades ( 8) Located in the middle of the toothed tubular mixer (6); the lower end of the toothed tubular mixer (6) is provided with toothed mixer outlet I (11), toothed mixer outlet II (12), and The spiral tubular mixer (15) is connected; the toothed blade (7) is evenly distributed at the upper and lower ends of the toothed tubular mixer (6), and the toothed blade (7) on the left side and the right side A toothed blade included on the side together forms a unit cell, and three units are arranged at the upper and lower ends respectively; the arc-shaped splitter blade (8) is located in the middle of the toothed tubular mixer (6), and the upper and lower parts Between the toothed blades (7), the upper part is connected by two symmetrical three-quarter circles, and the lower part is composed of two smooth arc-shaped partitions; the valve is installed in the toothed mixer Outlet I (11), links to each other with helical mixer inlet I (13); Described toothed mixer outlet II (12) directly links to each other with helical mixer inlet II (14) without any hindrance device; Described The upper end of the helical tubular mixer (15) comprises a horizontal helical mixer inlet I (13), a vertical helical mixer inlet II (14), and the main flow section of the helical tubular mixer (15) is an oval Shape, a section of zigzag spiral tubular mixer (15) is a unit; The jet printing motion module includes a variable power supply (9), a Z-direction moving shaft (16), a conductive needle fixture (17), a jet (19), a substrate (20), and a moving substrate (21); The variable power supply (9) can form a voltage ranging from tens of volts to several thousand volts according to the demand, and the conductive needle fixture (17) makes the outer surface of the cavity needle (18) and the substrate (20) form a An electric field, the ink solution (2) forms a stable jet (19) in the electric field; the Z-direction moving axis (16) is connected with the conductive spray needle clamp (17), so that the conductive spray needle clamp (17) is connected to the air The cavity needle (18) moves smoothly on the Z axis; the conductive needle fixture (17) is located in the middle of the cavity needle (18), connecting the cavity needle (18) and the Z-direction moving axis (16); The moving substrate (21) is closely attached to the ground below the substrate (20), and moves back and forth, left and right as required, so that the jet (19) prints different shapes on the substrate (20); Using the above device to carry out ink mixing electrojet printing is characterized in that the steps are as follows: In the first step, the ink solution is sent to the tubular mixer The ink solution (2) is stored in the sealed storage tank (1), and the transfer pump (5) provides power so that a certain amount of ink solution (2) is sucked into the precision delivery tube (4), and the ink solution (2) flows into the precision delivery tube (4). Before the conveying pipe (4), pass through the annular flow sensor (3), and the annular flow sensor (3) detects the flow rate of the ink solution (2) in the precision conveying pipe (4), and controls the ink solution through the conveying pump (5) in time after feeding back the data. The flow rate of the aqueous solution (2) avoids too much ink solution (2) in the precision delivery tube (4) to block or too little to cause unstable flow, and maintain the stability and uniformity of EFI printing; In the second step, the ink is fully mixed during the delivery process The precision delivery pipe (4) transports the ink solution (2) to the toothed tubular mixer (6), and first flows through the toothed blades (7) of the upper 3 cells of the toothed tubular mixer (6), and the ink The aqueous solution (2) forms an impact with the toothed blade (7), and the ink solution (2) precipitates after the initial mixing and transportation in the first step, and then flows through the arc-shaped splitter blade (8), and the arc-shaped splitter blade (8) will The water flow is divided into left and right streams. The left water flow surrounds the left arc-shaped splitter blade (8) to form a counterclockwise water flow and flows down the smooth arc-shaped partition in the lower part, and the right water flow surrounds the right arc-shaped splitter. The blade (8) forms a clockwise water flow, flows down the smooth arc-shaped partition in the lower part, counterclocks and mixes with the counterclockwise water flow on the left, and then flows through the 3 cells at the lower end of the toothed tube mixer (6) The toothed blade (7) is ready to flow out of the toothed tubular mixer (6). When flowing out, it passes through the toothed mixer outlet I (11) and the toothed mixer outlet II (12). The two outlets divide the water flow into two One stream flows through the outlet I (11) of the toothed mixer. There is a valve (10) on the outlet I (11) of the toothed mixer. The size of the valve (10) can be adjusted according to needs to adapt to different types of ink solutions (2) Ink solutions (2) with different flow rates are formed, and enter into the spiral mixer inlet I (13) horizontally, and another stream flows through the toothed mixer outlet II (12), and flows into the spiral mixer vertically without hindrance Inlet II (14), two streams of water flow through the outlet I (11) of the toothed mixer and restrict the flow through the valve (10), and flow through the outlet II (12) of the toothed mixer unimpeded, and finally form two different streams The water flow of speed is merged into the spiral tubular mixer (17), and the water flow of two different speeds produced by the same ink solution (2) utilizes the self-generated liquid flowing in the curved pipeline in the spiral tubular mixer (17). The centrifugal force field generates a secondary flow to achieve uniform mixing of the ink solution (2); The third step is to print the mixed ink solution The conductive needle fixture (17) and the cavity needle (18) move to a suitable position on the Z-axis to form a certain height with the substrate (20), and the variable power supply (9) is turned on to generate tens of volts to several Voltages ranging from kilovolts, the voltage passes through the outer surface of the conductive nozzle fixture (17) cavity nozzle (18), and forms an electric field with the substrate (20), so that the ink solution (2) is charged, and connected to the ground The moving substrates (21) attract each other to form a stable jet (19). According to the needs, the moving substrate (21) moves in the plane together with the substrate (20) to receive the ejected jet (19), and finally the substrate (20) ) to print the finished product.

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