阅读说明：本技术 一种固化程度可调的多种气流辅助电流体喷头 (Solidification degree adjustable multiple air current auxiliary electrofluid nozzle ) 是由 黄永安 史则颖 陈建魁 段永青 徐洲龙 于 2019-09-29 设计创作，主要内容包括：本发明涉及电流体喷印技术领域,具体涉及一种固化程度可调的多种气流辅助电流体喷头,包括喷嘴、入气壳体、出气壳体以及整流壳体；所述喷嘴针管贯穿整流壳体后设于出气壳体内；所述入气壳体设有第一气室；所述出气壳体设有第二气室以及气流通道；所述喷嘴针管设于气流通道；所述整流壳体设有整流孔；所述第一气室内设有加热组件；所述入气壳体设有气流入口；与所述出气壳体在第二气室处设有测温孔；所述测温孔内设有测温传感器；所述测温传感器以及加热组件均与温度控制器电性连接；所述温度控制器根据测温传感器测量的温度控制加热组件工作。通过上述设置实现了固化程度可调的多种气流辅助电流体喷头。(The invention relates to the technical field of electrofluid jet printing, in particular to a multiple air flow auxiliary electrofluid spray head with adjustable curing degree, which comprises a spray nozzle, an air inlet shell, an air outlet shell and a rectifying shell, wherein the air inlet shell is arranged in the shell; the nozzle needle tube penetrates through the rectifying shell and is arranged in the air outlet shell; the air inlet shell is provided with a first air chamber; the air outlet shell is provided with a second air chamber and an air flow channel; the nozzle needle tube is arranged in the airflow channel; the rectifying shell is provided with a rectifying hole; a heating assembly is arranged in the first air chamber; the air inlet shell is provided with an airflow inlet; a temperature measuring hole is arranged at the second air chamber together with the air outlet shell; a temperature measuring sensor is arranged in the temperature measuring hole; the temperature measuring sensor and the heating assembly are electrically connected with the temperature controller; and the temperature controller controls the heating assembly to work according to the temperature measured by the temperature measuring sensor. The multiple airflow-assisted electrofluid spray heads with adjustable curing degrees are realized through the arrangement.)

1. The utility model provides a solidification degree adjustable multiple air current auxiliary current liquid shower nozzle which characterized in that: comprises a nozzle, an air inlet shell (2), an air outlet shell (8) connected with the air inlet shell (2) and a rectifying shell (7) arranged between the air inlet shell (2) and the air outlet shell (8);

the nozzle comprises a nozzle shell (1) and a nozzle needle tube (11) communicated with the nozzle shell (1); the nozzle shell (1) is connected with the rectifying shell (7); the nozzle needle tube (11) penetrates through the rectifying shell (7) and then is arranged in the air outlet shell (8);

the air inlet shell (2) is provided with a first air chamber (23); the air outlet shell (8) is provided with a second air chamber (82) and an air flow channel (81) communicated with the second air chamber (82); the nozzle needle tube (11) is arranged in the air flow channel (81); the rectifying shell (7) is provided with a rectifying hole (71) for communicating the first air chamber (23) with the second air chamber (82);

a heating component is arranged in the first air chamber (23); the air inlet shell (2) is provided with an airflow inlet (22) communicated with a first air chamber (23); a temperature measuring hole (83) is arranged at the second air chamber (82) together with the air outlet shell (8); a temperature measuring sensor (9) for measuring the temperature of the second air chamber (82) is arranged in the temperature measuring hole (83);

the multiple air flow assisted electro-fluidic spray heads with adjustable curing degree further comprise a temperature controller (106); the temperature measuring sensor (9) and the heating assembly are electrically connected with the temperature controller (106); the temperature controller (106) controls the heating assembly to work according to the temperature measured by the temperature measuring sensor (9).

2. The multiple air-assisted electrohydrodynamic spray head of claim 1, wherein: the heating assembly comprises an arc-shaped side wall (21) arranged in the first air chamber (23) and a heating resistance wire (6) wound on the arc-shaped side wall (21); the arc-shaped side wall (21) is formed by extending the air inlet shell (2);

the air inlet shell (2) is provided with a wire passing hole (24) communicated with the first air chamber (23); the heating resistance wire (6) passes through the wire passing hole (24) through a lead and then is connected with the temperature controller (106); a sealing rubber plug (3) is arranged in the wire passing hole (24).

3. The multiple air-assisted electrohydrodynamic spray head of claim 2, wherein: bosses extend from both ends of the sealing rubber plug (3).

4. The multiple air-assisted electrohydrodynamic spray head of claim 2, wherein: the number of the arc-shaped side walls (21) is four; the four arc-shaped side walls (21) are arranged in the first air chamber (23) at equal intervals.

5. The multiple air-assisted electrohydrodynamic spray head of claim 1, wherein: a heat insulation layer (5) is arranged between the outer wall of the rectifying shell (7) and the first air chamber (23); the heat insulation layer (5) is made of nano ceramic.

6. The multiple air-assisted electrohydrodynamic spray head of claim 1, wherein: a first sealing ring (41) is arranged between the top of the rectifying shell (7) and the gas inlet shell (2); a second sealing ring (42) is arranged between the bottom of the rectifying shell (7) and the gas inlet shell (2); and a third sealing ring (43) is arranged between the rectifying shell (7) and the air outlet shell (8).

7. The multiple air-assisted electrohydrodynamic spray head of claim 1, wherein: the multiple air flow assisted electro-fluidic spray head with adjustable curing degree further comprises a power supply (105) and a substrate (104); one end of the power supply (105) is electrically connected with the nozzle shell (1); the other end of the power supply (105) is electrically connected with the substrate (104);

the nozzle shell (1) is connected with the rectifying shell (7) through the thread seal tape.

8. The multiple air-assisted electrohydrodynamic spray head of claim 1, wherein: the multiple airflow-assisted electrofluid spray head with adjustable curing degree further comprises an infrared sensor (107); the infrared sensor (107) is electrically connected with the temperature controller (106); the infrared sensor (107) is aligned with the open end of the airflow channel (81).

9. The multiple air-assisted electrohydrodynamic spray head of claim 1, wherein: the gas inlet shell (2) is in threaded connection with the gas outlet shell (8); a plurality of rectifying holes (71) are formed in the rectifying shell (7); the plurality of rectifying holes (71) are uniformly arranged on the rectifying shell (7).

10. The multiple air-assisted electrohydrodynamic spray head of claim 1, wherein: the cross section of the nozzle needle tube (11) is circular; the cross section of the air flow channel (81) is square; the nozzle needle tube (11) is arranged in a tangent way with the airflow channel (81);

the multiple airflow-assisted electrofluid spray head with adjustable curing degree further comprises a centering needle head (10) connected with the rectifying shell (7); the nozzle needle tube (11) penetrates through the rectifying shell (7) and the centering needle head (10) in sequence and then is arranged in the airflow channel (81).

Technical Field

The invention relates to the technical field of electrofluid spray printing, in particular to a multi-airflow-assisted electrofluid spray head with adjustable curing degree.

Background

Inkjet printing technology was earlier applied to print flat text images, and recently some simple electronic devices have been available with the continuous improvement of inkjet printing technology, but it faces many difficulties and challenges, such as the configuration of ink, the choice of substrate, the controllability of solvent evaporation, and the like. The traditional spray printing technology adopts a push mode, and has the problems of nozzle blockage, unstable jet flow and the like. Electrohydrodynamic printing is as a novel jet printing manufacturing approach, compares traditional inkjet printing and has the advantage that low in manufacturing cost, printing resolution is high, printing material wide range etc..

The electrohydrodynamic spray printing technology applies an electrohydrodynamic mechanism, liquid is pulled out from a nozzle opening by an electric field to form a Taylor cone, and the liquid at the nozzle can be acted by an electroshear stress because the nozzle has higher electric potential; when the local charge force exceeds the surface tension of the liquid, the charged liquid is ejected from the nozzle and then breaks up into a liquid column or droplets. By varying the flow rate, voltage, liquid properties and nozzle configuration, electrofluidic spray patterns with different jet shapes and breakup mechanisms, i.e., electrospinning, electrospotting and electrospray, can be formed.

Based on the electrofluid jet printing process, at present, researchers have proposed "an air flow assisted electrospray nozzle integrated with a grounding electrode", with application number 201611126421.4. The spray head is integrated with the grounding electrode ring, and the grounding electrode originally applied to the substrate is integrated into the spray head, so that the selection range of the collecting substrate is expanded, the application range and the flexibility thereof are improved, and the printing on a curved surface and an insulating substrate is facilitated; and an airflow auxiliary mode is adopted, and the constraint force of the airflow is utilized to overcome the radial component force pointing to the grounding electrode ring, so that the jet flow is prevented from being sprayed onto the grounding electrode ring. However, in practical application, the spray head has the following disadvantages:

1) this shower nozzle structure hardly guarantees the centering of the pipeline of nozzle and air current, and the centering degree of the pipeline of nozzle and air current is very big to the influence of air current, and at the in-process of installation, because there is the certain distance along the center pin of shower nozzle between syringe needle and the ring electrode, consequently the centering precision of airflow channel and syringe needle is too little, and supplementary air current incline exists inhomogeneous atress around the efflux, and the fluidic flight orbit of direct influence directly influences the printing precision of shower nozzle.

2) During the printing process, the solution can infiltrate into the outer wall of the nozzle and even spread along the outer wall of the nozzle due to the action of surface tension. The size of the printed jet flow can be influenced by the infiltration of the solution, the control of the printing precision of the nozzle is directly influenced by the condition, and the printing size precision of the nozzle is reduced.

The inventor also provides 'an auxiliary forming device for electrostatic spinning', the application number is 201820860518.6, the nozzle heats jet air flow, annular air flow with controllable temperature and flow is sprayed near the nozzle, jet flow is stabilized, jet flow whip is reduced, the stretching speed and the drying speed of the jet flow are controlled by using the air flow assistance, the forming of nano fibers is controlled, and the spinning quality is improved. However, the feedback adjusting device of the nozzle is arranged at the heating device, the temperature measurement is inaccurate, and the type of the introduced air flow is single.

The existing airflow auxiliary electric spray head has a plurality of problems, and the following points can be summarized:

1) the curing degree of the jet flow fiber is less considered in control, a heating device and a temperature measuring sensor are arranged in an air cavity at present, but the measured temperature is the temperature in the air cavity, not the temperature of an air outlet end, and the measured value is inaccurate;

2) the air flow auxiliary channel and the nozzle are not aligned well, and uneven stress can greatly influence jet flow tracks;

3) when the temperature rises, the common gas is then introduced, so that electric breakdown is easy to occur, and therefore an air flow auxiliary spray head which can accurately measure the temperature of the auxiliary air flow and effectively improve the breakdown voltage is required to be designed, and the jet flow solidification degree in the jet printing process is accurately regulated and controlled by accurately measuring the temperature of the auxiliary air flow.

Disclosure of Invention

The invention aims to provide a plurality of airflow-assisted electro-fluidic spray heads with adjustable curing degree, aiming at the defects in the prior art.

The purpose of the invention is realized by the following technical scheme: a multiple air flow auxiliary electrofluid spray head with adjustable curing degree comprises a spray nozzle, an air inlet shell, an air outlet shell connected with the air inlet shell, and a rectifying shell arranged between the air inlet shell and the air outlet shell;

the nozzle comprises a nozzle shell and a nozzle needle tube communicated with the nozzle shell; the nozzle shell is connected with the rectifying shell; the nozzle needle tube penetrates through the rectifying shell and is arranged in the air outlet shell;

the air inlet shell is provided with a first air chamber; the air outlet shell is provided with a second air chamber and an air flow channel communicated with the second air chamber; the nozzle needle tube is arranged in the airflow channel; the rectifying shell is provided with a rectifying hole for communicating the first air chamber with the second air chamber;

a heating assembly is arranged in the first air chamber; the air inlet shell is provided with an airflow inlet communicated with the first air chamber; a temperature measuring hole is arranged at the second air chamber together with the air outlet shell; a temperature measuring sensor for measuring the temperature of the second air chamber is arranged in the temperature measuring hole;

the multiple airflow-assisted electrofluid spray heads with adjustable curing degrees further comprise a temperature controller; the temperature measuring sensor and the heating assembly are electrically connected with the temperature controller; and the temperature controller controls the heating assembly to work according to the temperature measured by the temperature measuring sensor.

The invention is further provided that the heating component comprises an arc-shaped side wall arranged in the first air chamber and a heating resistance wire wound on the arc-shaped side wall; the arc-shaped side wall is formed by extending the air inlet shell;

the air inlet shell is provided with a wire passing hole communicated with the first air chamber; the heating resistance wire passes through the wire passing hole through a lead and then is connected with the temperature controller; and a sealing rubber plug is arranged in the wire passing hole.

The invention is further provided that bosses extend from both ends of the sealing rubber plug.

The invention is further provided that the number of the arc-shaped side walls is four; the four arc-shaped side walls are arranged in the first air chamber at equal intervals.

The invention is further provided that a heat insulation layer is arranged between the outer wall of the rectification shell and the first air chamber; the heat insulation layer is made of nano ceramics.

The invention is further provided that a first sealing ring is arranged between the top of the rectifying shell and the gas inlet shell; a second sealing ring is arranged between the bottom of the rectifying shell and the gas inlet shell; and a third sealing ring is arranged between the rectifying shell and the air outlet shell.

The invention is further provided that the multiple airflow-assisted electro-fluidic spray heads with adjustable curing degree further comprise a power supply and a substrate; one end of the power supply is electrically connected with the nozzle shell; the other end of the power supply is electrically connected with the substrate;

the nozzle shell is connected with the rectifying shell through the thread seal tape.

The invention is further provided that the multiple airflow-assisted electrofluid spray heads with adjustable curing degree further comprise an infrared sensor; the infrared sensor is electrically connected with the temperature controller; the infrared sensor is aligned with the open end of the airflow channel.

The invention is further arranged that the gas inlet housing is in threaded connection with the gas outlet housing; a plurality of rectifying holes are formed in the rectifying shell; a plurality of flow straightening holes are uniformly arranged on the flow straightening shell.

The invention is further provided that the cross section of the nozzle needle tube is circular; the cross section of the air flow channel is square; the nozzle needle tube is arranged in a tangent way with the airflow channel;

the multiple airflow-assisted electrofluid spray heads with adjustable curing degree further comprise centering needles connected with the rectifying shell; the nozzle needle tube penetrates through the rectifying shell and the centering needle head in sequence and then is arranged in the airflow channel.

The invention has the beneficial effects that:

1. the temperature of the air flow is adjusted through the heating assembly in the first air chamber, the temperature of the air flow is subjected to feedback adjustment by utilizing the temperature measuring sensor integrated in the air outlet shell, and the curing degree of jet printing jet flow can be controlled. Meanwhile, the air outlet end of the spray head is provided with an infrared inductor, the feedback of infrared temperature detection and the feedback of the temperature sensor are compared at the initial use stage, the temperature difference between the interior of the spray head and the air outlet end is compensated to the temperature controller, and the temperature of the final auxiliary airflow can be finally obtained only through the temperature sensor by acquiring temperature difference data.

2. It passes through a plurality of air current inlets on the first air chamber lateral wall, can let in multiple and combination gas, can effectively reduce breakdown voltage. For some special printing ink, protective gas needs to be introduced; for some solutions with lower viscosity, the height of the spray head needs to be reduced, and when the temperature is increased, electric breakdown is easy to occur under the condition, and the electric breakdown can be effectively avoided by introducing mixed gas; for some structures with special requirements, which need the jet flow surface to react with special gas to realize special printing structures, various structures with introduced gas flow can be used.

3. The centering and fixing mode of the square air flow pipeline and the nozzle needle tube ensures the centering precision of the nozzle needle tube and the air flow pipeline, so that jet flow at the tip of the nozzle needle tube is uniformly and symmetrically restrained by the air flow, the influence of auxiliary air flow deflection on the stability of a jet flow motion track is avoided, and the printing precision of the sprayer is improved.

4. The tangent fixing mode of the square airflow pipeline and the nozzle needle tube ensures that the airflow is tightly attached to the outer surface of the nozzle needle tube, so that the solution is prevented from infiltrating to the outer wall of the nozzle needle tube, the tangent airflow pipeline is used for guiding the flowing track of the jet flow, the influence of the infiltration of the solution on the jet flow size is avoided, and the dimensional accuracy of the nozzle printing is improved.

5. It can guarantee that the wire that heating resistor silk connects can be drawn forth safely through the wire guide at first air chamber top, utilizes the sealing rubber stopper that both sides have the boss to compress tightly fixedly to the wire, has guaranteed good gas tightness.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the air inlet housing of the present invention;

FIG. 3 is a bottom plan view of the nozzle needle cannula of the present invention in cooperation with the air flow passages;

FIG. 4 is a cross-sectional view of a first aspect of the nozzle needle assembly of the present invention in cooperation with an airflow passage;

FIG. 5 is a cross-sectional view of a second aspect of the nozzle needle assembly of the present invention in cooperation with an airflow passageway;

FIG. 6 is a cross-sectional view of a third aspect of the nozzle needle assembly of the present invention in cooperation with an airflow passageway;

wherein: 1-a nozzle housing; 11-nozzle needle tubing; 2-gas inlet shell; 21-an arcuate sidewall; 22-a gas flow inlet; 23-a first air chamber; 24-a wire through hole; 3-sealing the rubber plug; 41-a first sealing ring; 42-a second seal ring; 43-third seal ring; 5-a heat insulation layer; 6-heating resistance wires; 7-a rectifying shell; 71-a rectifying hole; 8-air outlet shell; 81-air flow channel; 82-a second air chamber; 83-temperature measuring hole; 9-a temperature measuring sensor; 10-centering the needle head; 101-a micro-flow pump; 102-a first air pump; 103-a second air pump; 104-a substrate; 105-a power supply; 106-temperature controller; 107-infrared sensor.

Detailed Description

The invention is further described with reference to the following examples.

As can be seen from fig. 1 to 6; the multiple airflow-assisted electrofluid spray head with adjustable curing degree comprises a spray nozzle, an air inlet shell 2, an air outlet shell 8 connected with the air inlet shell 2, and a rectifying shell 7 arranged between the air inlet shell 2 and the air outlet shell 8;

the nozzle comprises a nozzle shell 1 and a nozzle needle tube 11 communicated with the nozzle shell 1; the nozzle shell 1 is connected with the rectifying shell 7; the nozzle needle tube 11 penetrates through the rectifying shell 7 and is arranged in the air outlet shell 8;

the gas inlet shell 2 is provided with a first gas chamber 23; the air outlet shell 8 is provided with a second air chamber 82 and an air flow channel 81 communicated with the second air chamber 82; the nozzle needle tube 11 is arranged in the airflow channel 81; the rectifying casing 7 is provided with a rectifying hole 71 for communicating the first air chamber 23 with the second air chamber 82;

a heating component is arranged in the first air chamber 23; the air inlet shell 2 is provided with an airflow inlet 22 communicated with a first air chamber 23; a temperature measuring hole 83 is arranged at the second air chamber 82 with the air outlet shell 8; a temperature measuring sensor 9 for measuring the temperature of the second air chamber 82 is arranged in the temperature measuring hole 83;

the multiple airflow-assisted electro-fluidic spray heads with adjustable curing degree further comprise a temperature controller 106; the temperature measuring sensor 9 and the heating assembly are electrically connected with the temperature controller 106; the temperature controller 106 controls the heating assembly to work according to the temperature measured by the temperature measuring sensor 9. The multiple airflow-assisted electro-fluidic sprinkler with adjustable curing degree according to the embodiment further includes a power supply 105 and a substrate 104; one end of the power supply 105 is electrically connected with the nozzle housing 1; the other end of the power supply 105 is electrically connected with the substrate 104;

the nozzle shell 1 is connected with the rectifying shell 7 through a raw material belt.

Specifically, the multiple airflow-assisted electro-fluidic nozzle with adjustable curing degree according to the present embodiment is a nozzle that is conventionally used in electro-fluidic printing, and includes a section of nozzle needle tube 11, the nozzle housing 1 at the upper end of the nozzle is cylindrical, and can form a tight connection with the rectifying housing 7 by winding a raw material tape, and ink is supplied by the micro-flow pump 101. The upper end of the nozzle housing 1 is connected to a power supply 105, and forms a circuit with the substrate 104, and the substrate 104 is grounded.

The first air cavity is internally provided with a heating component, air is introduced into the first air cavity through the air inlet 22, and the heating component can enable the air flow to be uniformly heated in the first air cavity. Since the breakdown voltage is reduced when the temperature is increased, a certain proportion of mixed gases is required to be introduced to reduce the breakdown voltage, the gas inlets 22 may be uniformly distributed on the sidewall of the gas inlet housing 2, a plurality of gas inlets 22 may be provided as required, and a plurality of gases may be supplied by the first gas pump 102 and the second gas pump 103.

The rectification housing 7 plays a role in carding gas in the first air cavity. The gas uniformly heated in the first gas chamber flows into the conical second gas chamber 82 of the gas outlet shell 8 through the rectification gas holes uniformly distributed on the rectification shell 7;

the gas then flows from the second chamber 82 through the annular space between the gas flow conduit and the nozzle needle 11, and the gas flow assists the jet emitted from the tip of the nozzle needle 11. The mode can ensure that the airflow is tightly attached to the outer surface of the nozzle needle tube 11, prevent the solution from infiltrating the outer wall of the nozzle needle tube 11, avoid the influence of the infiltration of the solution on the jet size and improve the dimensional accuracy of the printing of the nozzle.

In addition, the multiple airflow-assisted electro-fluidic spray heads with adjustable curing degree can also comprise an infrared sensor 107; the infrared sensor 107 is electrically connected with the temperature controller 106; the infrared sensor 107 is aligned with the open end of the airflow channel 81.

The principle of adjusting the curing degree is as follows: the measurement of the gas temperature has two steps: at the initial stage of using the spray head, an infrared sensor 107 is required to be placed outside the spray head, namely the opening end of the airflow channel 81, the temperature sensor 9 is used for measuring the temperature of the heating airflow inside the air outlet shell 8, when the heating airflow is sprayed out from the air outlet end, the temperature changes after a certain distance, at the moment, the external infrared sensor 107 is required to perform second measurement, the temperature measured by the temperature sensor 9 and the infrared sensor 107 are both fed back to the temperature controller 106, and the temperature difference of the airflow at the air outlet end and the air outlet shell 8 can be obtained by comparing the feedback signals of the temperature measured by the temperature sensor 9 and the infrared; when the spray head is used in the later stage, the part of the infrared sensor 107 can be removed, and the temperature of the air outlet end after temperature compensation can be obtained through the feedback signal of the temperature measuring sensor 9 and the temperature difference information obtained in the earlier stage. The mode can make the integration of shower nozzle more excellent, can obtain accurate end temperature of giving vent to anger simultaneously to adjust the solidification degree.

In the multiple airflow-assisted electrofluid spray head with adjustable curing degree, the heating assembly comprises an arc-shaped side wall 21 arranged in a first air chamber 23 and a heating resistance wire 6 wound on the arc-shaped side wall 21; the arc-shaped side wall 21 is formed by extending the air inlet shell 2; in the multiple airflow-assisted electrofluid spray head with adjustable curing degree, the number of the arc-shaped side walls 21 is four; the four arc-shaped side walls 21 are arranged in the first air chamber 23 at equal intervals. Specifically, four evenly distributed arc-shaped side walls 21 are arranged in the first air cavity, the top view of the first air cavity can be seen in fig. 2, the heating resistance wire 6 is wound on the arc-shaped side walls 21, air is introduced into the first air cavity through the air inlet 22, and the four independent arc-shaped side walls 21 can enable air flow to be evenly heated in the first air cavity.

The gas inlet shell 2 is provided with a line passing hole 24 communicated with the first gas chamber 23; the heating resistance wire 6 passes through the wire passing hole 24 through a lead and then is connected with the temperature controller 106; the wire passing hole 24 is internally provided with a sealing rubber plug 3. This embodiment a multiple air current auxiliary current body spray head of curing degree adjustable, the both ends of sealing plug 3 all extend there is the boss. The sealing rubber plug 3 is used for sealing the connection between the heating resistance wire 6 and the wire passing hole 24; the boss structures at the two ends of the sealing rubber plug 3 can ensure that the first air cavity of the air inlet shell 2 is isolated from the outside, so that the lead can be led out safely.

In the multiple airflow-assisted electrofluid spray head with adjustable curing degree of the present embodiment, a thermal insulation layer 5 is disposed between the outer wall of the rectifying casing 7 and the first air chamber 23; the heat insulation layer 5 is made of nano ceramics. The heat insulation layer 5 is made of nano ceramic and has good heat insulation performance. The heated gas has a certain temperature in the first gas cavity, and when the temperature is too high, the solution in the nozzle is solidified in advance when not sprayed, so that the spray head is blocked, and therefore, the solution needs to be protected in a heat insulation way in the heating process.

In the multiple airflow-assisted electrofluid spray head with adjustable curing degree of the present embodiment, a first sealing ring 41 is disposed between the top of the rectifying casing 7 and the gas inlet casing 2; a second sealing ring 42 is arranged between the bottom of the rectifying shell 7 and the gas inlet shell 2; and a third sealing ring 43 is arranged between the rectifying shell 7 and the air outlet shell 8. The above arrangement functions to seal the first air chamber 23 and the second air chamber 82.

In the multiple airflow-assisted electrofluid spray head with adjustable curing degree, the gas inlet shell 2 is in threaded connection with the gas outlet shell 8; a plurality of rectifying holes 71 are formed in the rectifying shell 7; the plurality of rectification holes 71 are uniformly provided in the rectification housing 7.

The air inlet housing 2 and the air outlet housing 8 are connected by screw threads so as to adjust the relative height of the air flow pipeline and the nozzle needle tube 11. The relative heights of the airflow channel and the nozzle needle 11 are different, and the acting force and direction of the auxiliary airflow on the jet flow are also different, please refer to fig. 4 to 6, and fig. 4 to 6 show three relative height relationships of the airflow channel 81 and the nozzle needle 11.

When the bottom end of the nozzle needle tube 11 is flush with the bottom end of the air flow pipeline, the acting force of the air flow on the jet printing jet flow is gentle, please refer to fig. 4; when the bottom end of the nozzle needle tube 11 is arranged inside the air flow pipeline, the air flow has relatively large acting force on jet printing jet flow, please refer to fig. 5; when the bottom end of the nozzle needle 11 is positioned outside the air flow duct, the air flow has a relatively small force on the jet printing jet, see fig. 6.

In the multiple airflow-assisted electro-fluidic spray head with adjustable curing degree, the cross section of the nozzle needle tube 11 is circular; the cross-sectional shape of the air flow channel 81 is square; the nozzle needle tube 11 is arranged in a tangent way with the airflow channel 81;

the multiple airflow-assisted electrofluid spray head with adjustable solidification degree further comprises a centering needle head 10 connected with the rectifying shell 7; the nozzle needle tube 11 passes through the rectifying shell 7 and the centering needle 10 in sequence and then is arranged in the air flow channel 81.

Wherein the side length of the air flow pipeline is consistent with the outer diameter of the nozzle needle tube 11. The nozzle needle tube 11 is inserted into the airflow pipeline at the tail end of the second air chamber 82 through the centering needle 10, and the outer wall of the nozzle needle tube 11 is tangent to the inner wall of the airflow pipeline, so that the nozzle needle tube 11 and the airflow pipeline can be ensured to have very high centering precision, the auxiliary airflow is prevented from deflecting, the airflow constraint force on jet flow is uniform and symmetrical, and the influence of the auxiliary airflow on the jet flow stability is reduced.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.