Atomizer for producing a conductive aerosol and aerosol electronic additive printing apparatus

Abstract

The utility model discloses an atomizer and aerosol electronic additive printing equipment of producing conductive aerosol relates to electronic additive manufacturing equipment technical field. This atomizer can directly utilize high -speed airflow to extract conductive slurry through the siphon structure design between high -speed air pipe and liquid extraction catheter in the closed container, and directly scatters the conductive slurry of extraction with the uninterrupted high -speed airflow, realizes the conductive slurry and scatters into the aerosol particle of floating, need not extra design collision structure, has reduced the complexity of structure design and manufacturing.

Description

Technical Field

[0001] This utility model belongs to the technical field of electronic additive manufacturing equipment, and in particular relates to an atomizer that generates conductive aerosol and an aerosol electronic additive printing device. Background Technology

[0002] Aerosol jetting 3D printing technology utilizes aerodynamic principles to atomize conductive slurry into micro- and nano-sized suspended aerosol particles. Then, a sheath airflow is introduced to shape the aerosol airflow, and finally, the shaped aerosol airflow is deposited onto the target surface. It can be applied in fields such as electronic packaging, microcircuits, embedded components, flexible circuits, antenna sensors, semiconductor chips, medical devices, or industrial parts.

[0003] Currently, aerosol atomization structures are mainly divided into ultrasonic atomization and pneumatic atomization. Pneumatic atomization directly draws out the conductive paste through a carrier airflow and designs collision structures along its path to disperse and export it. Ultrasonic atomization, on the other hand, requires the introduction of an additional carrier airflow on top of an ultrasonic vibrating plate to achieve aerosol export. Moreover, the ultrasonic vibrating plate usually generates unwanted heat before the conductive paste solidifies. Therefore, pneumatic atomization is more suitable for conductive pastes. However, the current pneumatic atomization structure for conductive pastes still suffers from problems such as complex structure and high cost. Utility Model Content

[0004] In view of this, one objective of this utility model is to provide an atomizer for generating conductive aerosol, so as to solve the problem of complex pneumatic atomization structure of conductive slurry in the prior art.

[0005] In some illustrative embodiments, the atomizer generating conductive aerosol includes: a sealed container for containing conductive slurry; a high-speed gas tube penetrating the sealed container and extending one end into the interior of the sealed container; wherein the high-speed gas tube inside the sealed container is located above the liquid surface of the conductive slurry and has a first tube wall and a second tube wall that are variable in diameter and continuous in the direction close to the conductive slurry; wherein the diameter of the first tube wall is larger than the diameter of the second tube wall; and a device disposed inside the sealed container and hermetically fitted at one end to the conductive slurry. The first tube wall of the high-speed gas pipe has a liquid extraction conduit, the other end of which is located below the liquid surface of the conductive slurry; a gap is left between the second tube wall of the high-speed gas pipe and the inner wall of the liquid extraction conduit, which communicates with the inside of the liquid extraction conduit, and a high-speed nozzle is opened on the second tube wall of the high-speed gas pipe. An atomizing port with the same axis as the high-speed nozzle is opened at the horizontally opposite position of the liquid extraction conduit and the high-speed nozzle, and the diameter of the atomizing port is larger than the diameter of the high-speed nozzle; an aerosol outlet is provided at the upper part of the sealed container.

[0006] In some alternative embodiments, the sealed container includes a cup-shaped container with an opening at the top and a lid that closes the opening; wherein the high-speed air tube passes through the lid, and the aerosol outlet is located on the lid.

[0007] In some alternative embodiments, the high-speed air tube and the cover are detachable.

[0008] In some alternative embodiments, the inner diameter of the high-speed air tube is uniform.

[0009] In some alternative embodiments, the other end of the high-speed air tube extends away from the sealed container to connect to a high-speed airflow source.

[0010] In some alternative embodiments, the aerosol outlet is provided with an air vent connector for connecting the aerosol printhead.

[0011] In some alternative embodiments, the diameter of the high-speed nozzle is 0.05 to 0.3 mm.

[0012] In some alternative embodiments, the diameter of the atomizing orifice is between 2 and 10 times the diameter of the high-speed nozzle.

[0013] In some alternative embodiments, the length of the gap is between the diameter range of the high-speed nozzle and the atomizing port.

[0014] Another objective of this invention is to provide an aerosol electronic additive printing device to solve the problems in the prior art.

[0015] In some illustrative embodiments, the aerosol electronic additive printing apparatus includes an atomizer for generating conductive aerosols as described in any of the preceding embodiments.

[0016] Compared with the prior art, this application has the following advantages:

[0017] This application utilizes a siphon structure design between a high-speed air pipe and a liquid extraction conduit within a sealed container. This design allows for the direct extraction of conductive slurry using high-speed airflow, and the continuous high-speed airflow can be used to disperse the extracted conductive slurry into floating aerosol particles. This eliminates the need for additional collision structures, reducing the complexity of structural design and manufacturing. Attached Figure Description

[0018] Figure 1 This is a structural example of the atomizer in the embodiments of this utility model;

[0019] Figure 2 This is a cross-sectional view of the atomizer in an embodiment of this utility model;

[0020] Figure 3This is a partial enlarged view of the atomizer in an embodiment of this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] It should be noted that, where there is no conflict, the various technical features in the embodiments of this utility model can be combined with each other.

[0023] This utility model discloses an atomizer for generating conductive aerosol, specifically, as follows: Figure 1-3 As shown, Figure 1 This is a structural example of the atomizer in the embodiments of this utility model; Figure 2 This is a cross-sectional view of the atomizer in an embodiment of this utility model; Figure 3 This is a partially enlarged view of the atomizer in an embodiment of the present invention. The atomizer includes: a sealed container (such as a cup-shaped container 2 and a cover 1) for containing conductive slurry S; a high-speed air pipe 3 penetrating the sealed container and extending into the interior of the sealed container at one end; wherein the high-speed air pipe 3 inside the sealed container is located above the liquid surface of the conductive slurry S, and has a first pipe wall and a second pipe wall with varying diameters and continuous in the direction close to the conductive slurry S; wherein the diameter of the first pipe wall is larger than the diameter of the second pipe wall; and a first... A liquid extraction conduit 4 is located on one wall of a tube, with its other end below the liquid surface of the conductive slurry S; a gap 7 is left between the second wall of the high-speed air pipe 3 and the inner wall of the liquid extraction conduit 4, which communicates with the inside of the liquid extraction conduit 4; a high-speed nozzle 5 is opened on the second wall of the high-speed air pipe 3; an atomizing port 6 with the same axis as the high-speed nozzle 5 is opened at the horizontal relative position of the liquid extraction conduit 4 and the high-speed nozzle 3; the diameter of the atomizing port 6 is larger than the diameter of the high-speed nozzle 5; an aerosol outlet is provided at the top of the sealed container.

[0024] During use, a high-speed airflow is injected into the high-speed air tube and ejected from a narrow high-speed nozzle inside a sealed container, transforming the high-speed airflow into a jet stream. Since the high-speed nozzle and the atomizing port are on the same axis, and the atomizing port is larger than the high-speed nozzle, the ejected jet stream will enter the atomizing port under inertia and exit from the atomizing port. At the same time, due to the gap between the high-speed air tube and the liquid extraction tube that is in direct contact with the jet stream, a negative pressure is generated in the liquid extraction tube under the drive of the jet stream to draw in the conductive slurry to be atomized. In other words, the conductive slurry is drawn to the high-speed nozzle through the siphon principle, and then dispersed and atomized into aerosol particles by the jet stream and discharged from the atomizing port, and then exited at the aerosol outlet.

[0025] This application utilizes a siphon structure design between a high-speed air pipe and a liquid extraction conduit within a sealed container. This design allows for the direct extraction of conductive slurry using high-speed airflow, and the continuous high-speed airflow can be used to disperse the extracted conductive slurry into floating aerosol particles. This eliminates the need for additional collision structures, reducing the complexity of structural design and manufacturing.

[0026] In some embodiments, the sealed container includes a cup-shaped container 2 with an opening at the top and a cover 1 that closes the opening; wherein a high-speed air tube 3 passes through the cover 1, and an aerosol outlet is located on the cover 1. In this embodiment, the sealed container is designed as a combination structure of a cup-shaped container and a cover, which facilitates component assembly and makes it easy to handle blockages. The cover and the cup-shaped container can be connected by a threaded connection and a sealing ring.

[0027] In some embodiments, the high-speed air tube 3 and the cover 1 are detachable. In this embodiment, the high-speed air tube and the cover are further designed as a detachable structure, allowing for independent and rapid replacement of the high-speed air tube. The high-speed air tube and the cover can be connected using a threaded connection with a sealing ring.

[0028] In some embodiments, the inner diameter of the high-speed air pipe 3 is uniform. Designing the inner diameter of the high-speed air pipe to be the same size in this embodiment reduces the complexity of the airflow design within the high-speed air pipe. Specifically, the inner diameter of the high-speed air pipe is at least one order of magnitude larger than the high-speed nozzle.

[0029] In some embodiments, the other end of the high-speed air tube 3 extends away from the sealed container to connect to a high-speed airflow source.

[0030] In some embodiments, the aerosol outlet is provided with an air vent connector 8 for connecting the aerosol printhead.

[0031] In some embodiments, the diameter of the high-speed nozzle is 0.05–0.3 mm. This nozzle diameter range is sufficient to produce conductive aerosol particles with high-precision particle size characteristics required by aerosol electronic additive printing equipment. Furthermore, due to its design being much smaller than the inner diameter of the high-speed air tube, the flow rate of the introduced high-speed airflow can be reduced. Specifically, the nozzle diameter can be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, or 0.23 mm.

[0032] In some embodiments, the diameter of the atomizing orifice is between 2 and 10 times the diameter of the high-speed nozzle, including but not limited to 2, 3, 4, 5, 6, 7, 8, 9, and 10 times. Where the atomizing orifice is larger than the high-speed nozzle, a smaller diameter is beneficial for reducing the particle size of the generated conductive aerosol.

[0033] In some embodiments, the length of the gap is between the diameters of the high-speed nozzle and the atomizing nozzle. The length of the gap refers to the radius difference between the second wall of the high-speed air tube and the liquid extraction conduit along the same diameter line.

[0034] In this embodiment of the invention, the conductive particles in the conductive slurry should be smaller than the length of the voids and the diameter of the atomizing nozzle.

[0035] In some embodiments, the sealed container or cup-shaped container in this utility model embodiment may be made of transparent material to facilitate observation of the aerosol atomization inside the container.

[0036] Another objective of this invention is to provide an aerosol electronic additive printing device, which includes an atomizer for generating conductive aerosols as described above.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An atomizer for producing a conductive aerosol, characterized by, include: A sealed container for holding conductive paste; A high-speed gas pipe passes through the sealed container and extends into the interior of the sealed container at one end; wherein the high-speed gas pipe inside the sealed container is located above the liquid surface of the conductive slurry, and has a first pipe wall and a second pipe wall that are variable in diameter and continuous in the direction close to the conductive slurry; wherein the diameter of the first pipe wall is larger than the diameter of the second pipe wall. A liquid extraction conduit is located inside the sealed container, with one end sealed and sleeved on the first pipe wall of the high-speed gas pipe, and the other end is located below the liquid surface of the conductive slurry. A gap is left between the second wall of the high-speed air pipe and the inner wall of the liquid extraction conduit, which communicates with the inside of the liquid extraction conduit. A high-speed nozzle is provided on the second wall of the high-speed air pipe. An atomizing port with the same axis as the high-speed nozzle is provided at the horizontal relative position of the liquid extraction conduit and the high-speed nozzle. The diameter of the atomizing port is larger than the diameter of the high-speed nozzle. The sealed container is provided with an aerosol outlet at the top.

2. The atomizer of claim 1, wherein, The sealed container includes a cup-shaped container with an opening at the top and a lid that closes the opening; wherein the high-speed air tube passes through the lid, and the aerosol outlet is located on the lid.

3. The atomizer of claim 2, wherein, The high-speed air pipe and the cover are detachable.

4. The atomizer of claim 1, wherein, The inner diameter of the high-speed air pipes is uniform.

5. The atomizer of claim 1, wherein, The other end of the high-speed air pipe extends away from the sealed container to connect to a high-speed airflow source.

6. The atomizer according to claim 1, characterized in that, The aerosol outlet is equipped with an air vent connector for connecting the aerosol printhead.

7. The atomizer of claim 1, wherein, The diameter of the high-speed nozzle is 0.05 to 0.3 mm.

8. The atomizer of claim 1, wherein, The diameter of the atomizing port is between 2 and 10 times the diameter of the high-speed nozzle.

9. The atomizer according to claim 1, characterized in that, The length of the gap is between the diameter range of the high-speed nozzle and the atomizing port.

10. An aerosol electronic additive printing device, characterized in that, The atomizer comprising any one of claims 1-9 for generating conductive aerosol.

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