Screen printing device
By using a slurry conveying system driven by a high-pressure intake pipe in the screen printing device, the problems of susceptibility to contamination and low printing efficiency in the prior art are solved, and high-quality and high-efficiency printing effects are achieved.
Patent Information
- Application Number
- CN202421907785.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-07
AI Technical Summary
In the prior art, the quality of the paste in the screen printing device is susceptible to contamination and the printing efficiency is low, which makes it difficult to control the quality of the printing grid line.
A screen printing device including a slurry assembly and a scraper is designed to input high-pressure gas through a high-pressure intake pipe to achieve clean conveying of slurry and automatic slurrying, reducing mechanical friction and air exposure, and improving the cleanliness and printing efficiency of slurry.
The clean high-pressure gas drives the slurry transport, ensuring the cleanliness of the slurry, improving printing quality and efficiency, reducing ink return action, and enhancing the control of the quality of the printing grid line.
Smart Images
Figure CN222921231U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of photovoltaic cell manufacturing equipment, and more specifically, to a screen printing device. Background Art
[0002] In the photovoltaic solar energy industry, the manufacturing of solar cells requires several processes including texturing, diffusion, etching, coating, screen printing, and sintering. Among them, the front and back electrodes and the back surface field of the solar cell are all completed through screen printing. Screen printing is one of the key processes in the crystalline silicon cell process of solar cells. Screen printing is to coat the paste on the silicon wafer according to a pre-designed pattern to form the electrodes of the solar cell.
[0003] In the existing screen printing device, a transfer pump is set on the pipeline at the slurry outlet to achieve slurry transfer, and then the slurry is printed onto the silicon wafer through screen printing. During printing, the slurry is added to the screen plate, and the squeegee applies a certain pressure to the screen plate and moves towards the other end of the screen plate at the same time. During this process, the use of a doctor blade needs to be coordinated, and the slurry is evenly pushed back onto the screen plate for better printing.
[0004] However, in the prior art, during the process of transferring the slurry, mechanical friction will occur between the slurry and the transfer pump, so the cleanliness of the slurry cannot be guaranteed; in addition, during the printing process, the slurry needs to be shoveled back to the printing area by employees regularly to be utilized, and if the slurry is exposed to the air for too long, it will gradually solidify, which will lead to the generation of defective printed sheets, such as defective conditions such as broken grids, ghost printing, and nodes on the front of the printed grid lines. In the printing device of the prior art, the quality of the slurry is easily contaminated, and the printing efficiency is low, so it is difficult to control the quality of the printed grid lines. Summary of the Utility Model
[0005] In view of this, the present application provides a screen printing device, aiming to solve the technical problems of easy contamination of the slurry quality and low printing efficiency in the prior art.
[0006] The present application provides a screen printing device, including at least one slurry adding component and a squeegee correspondingly arranged with the slurry adding component;
[0007] The slurry adding component includes a slurry barrel, a slurry outlet pipeline, a barrel cover, and a high-pressure air inlet pipe. The slurry barrel is provided with a slurry storage cavity for storing the slurry. The first end of the slurry outlet pipeline is connected to the bottom end of the slurry barrel, and the slurry outlet pipeline is communicated with the slurry storage cavity;
[0008] The squeegee is connected to the second end of the slurry outlet pipeline. The squeegee is provided with a slurry storage cavity for accommodating the slurry. The slurry storage cavity is communicated with the slurry outlet pipeline, and a printing through hole communicated with the slurry storage cavity is arranged at the bottom end of the squeegee;
[0009] The top end of the slurry bucket is connected to the bucket lid. The first end of the high-pressure air inlet pipe is connected to the bucket lid. The high-pressure air inlet pipe communicates with the slurry storage chamber, and the second end of the high-pressure air inlet pipe is used for inputting high-pressure gas.
[0010] Optionally, the screen printing device further includes a dilution bucket. The dilution bucket is connected to the slurry bucket through a flow valve. The dilution bucket is provided with a liquid storage chamber for storing a dilution solvent, and the liquid storage chamber communicates with the slurry storage chamber.
[0011] Optionally, the screen printing device includes a printing cylinder. Inside the printing cylinder, a support column is arranged along the axis of the printing cylinder. Between the inner wall of the printing cylinder and the support column, a plurality of partition plates are arranged. The partition plates are arranged along the radial direction of the printing cylinder;
[0012] The space formed by the side wall of the printing cylinder, the support column, and between two adjacent partition plates is configured as the slurry storage chamber.
[0013] Optionally, the bottom end of the slurry bucket is provided with a slurry output through hole. The first end of the slurry output pipe is connected to the slurry output through hole. The bottom wall of the slurry storage chamber is an inclined surface inclined towards the slurry output through hole.
[0014] Optionally, the slurry adding assembly further includes a motor and a stirring mechanism. The stirring mechanism includes a stirring shaft. The motor is installed on the bucket lid. The motor is connected to the first end of the stirring shaft, and the second end of the stirring shaft is located in the slurry storage chamber.
[0015] Optionally, the cross-section of the inner wall of the slurry bucket is non-circular;
[0016] The stirring shaft is connected to a coaxial lead screw;
[0017] The slurry adding assembly further includes a slurry scraping mechanism. The slurry scraping mechanism includes a slurry scraping ring and a guiding member. The slurry scraping ring is adapted to the shape of the inner wall of the slurry bucket, and the slurry scraping ring is in contact with the inner wall of the slurry bucket. The guiding member is provided with a guiding through hole. The lead screw passes through the guiding through hole, and the guiding through hole is threadedly connected to the lead screw; The slurry scraping ring is connected to the guiding member through a connecting rib.
[0018] Optionally, the stirring mechanism further includes a stirring blade group. The stirring blade group is connected to the stirring shaft, and the stirring blade group is located below the slurry scraping mechanism;
[0019] The stirring blade group includes a plurality of stirring blades. The radial dimension of the stirring blade along the stirring shaft is smaller than the distance between the surface of the stirring shaft and the side wall of the slurry bucket;
[0020] A plurality of the stirring blades are evenly distributed on the surface of the stirring shaft, and the stirring blades extend along the radial direction of the stirring shaft.
[0021] Optionally, a lubricating functional layer is provided on the inner wall of the slurry bucket.
[0022] Optionally, the dilution bucket is provided with scales.
[0023] Optionally, the slurry bucket is provided with a pressure gauge for monitoring the air pressure in the slurry storage chamber.
[0024] Compared with the prior art, the screen printing device provided by the present application has at least achieved the following beneficial effects:
[0025] In the screen printing device provided by the present application, high-pressure gas is input through the second end of the high-pressure air inlet pipe. The high-pressure gas enters the slurry storage chamber along the high-pressure air inlet pipe, and the pressure in the slurry storage chamber increases, pressing the slurry into the slurry outlet pipe. The slurry enters the slurry storage chamber of the squeegee along the slurry outlet pipe, and the slurry entering the slurry storage chamber flows out through the printing through holes. When printing with the screen printing device in this embodiment, since clean high-pressure gas is used as the power source for the slurry flow to automatically add slurry to the slurry storage chamber of the squeegee, compared with the prior art method of using a transfer pump to transport the slurry, the cleanliness of the slurry can be guaranteed, which is beneficial to improving the printing quality. In addition, as the squeegee moves on the screen, the slurry in the slurry storage chamber flows out, avoiding the slurry from being exposed to the air for a long time and solidifying. The printing action replaces the original ink return action, reducing the ink return action and improving the printing efficiency and quality.
[0026] Of course, it is not necessary for any product implementing the present application to simultaneously achieve all the above-mentioned technical effects.
[0027] Through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings, other features and advantages of the present application will become clear. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present application and, together with the description, are used to explain the principles of the present application.
[0029] Figure 1 The structure diagram of the screen printing device in the embodiment of the present application is shown;
[0030] Figure 2 The structure diagram of the printing cylinder provided by the embodiment of the present application is shown;
[0031] Figure 3 The top view of the slurry scraping mechanism provided by the embodiment of the present application is shown;
[0032] Figure 4 Shown is the sectional view of the slurry scraping mechanism provided by the embodiment of the present application along Figure 2 the A-A direction. Detailed Implementation Modes
[0033] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application.
[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present application or its application or use.
[0035] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be regarded as part of the specification.
[0036] In all examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.
[0037] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof in subsequent drawings is not required.
[0038] To solve the above technical problems, the present application proposes a screen printing device. Figure 1 The following shows a schematic structural diagram of the screen printing device in an embodiment of the present application. Refer to Figure 1 , the screen printing device includes at least one slurry adding component and a squeegee 200 correspondingly arranged with the slurry adding component;
[0039] The slurry adding component includes a slurry barrel, a slurry outlet pipe 120, a barrel cover, and a high-pressure air inlet pipe 140. The slurry barrel is provided with a slurry storage cavity 111 for storing slurry. The first end of the slurry outlet pipe 120 is connected to the bottom end of the slurry barrel, and the slurry outlet pipe 120 communicates with the slurry storage cavity 111;
[0040] The squeegee 200 is connected to the second end of the slurry outlet pipe 120. The squeegee 200 is provided with a slurry storage cavity for accommodating slurry. The slurry storage cavity communicates with the slurry outlet pipe 120, and the bottom end of the squeegee 200 is provided with a printing through hole communicating with the slurry storage cavity;
[0041] The top end of the slurry barrel is connected to the barrel cover. The first end of the high-pressure air inlet pipe 140 is connected to the barrel cover. The high-pressure air inlet pipe 140 communicates with the slurry storage cavity 111, and the second end of the high-pressure air inlet pipe 140 is used for inputting high-pressure gas.
[0042] During specific implementation, both between the top end of the slurry bucket and the bucket lid, and between the first end of the high-pressure air inlet pipe 140 and the bucket lid can be sealed and connected through a sealing structural member (such as a sealing ring). In this way, the leakage of high-pressure gas in the slurry storage chamber 111 between the slurry bucket and the bucket lid, and between the high-pressure air inlet pipe 140 and the bucket lid can be reduced or avoided.
[0043] In the screen printing device provided in this embodiment, high-pressure gas is input through the second end of the high-pressure air inlet pipe 140. The high-pressure gas enters the slurry storage chamber 111 along the high-pressure air inlet pipe 140, and the pressure in the slurry storage chamber 111 increases, pressing the slurry into the slurry outlet pipe 120. The slurry enters the slurry storage chamber of the squeegee 200 along the slurry outlet pipe 120, and the slurry entering the slurry storage chamber flows out through the printing through-holes. When printing with the screen printing device in this embodiment, since clean high-pressure gas is used as the power source for the slurry flow to automatically add slurry to the slurry storage chamber of the squeegee 200, compared with the method of using a transfer pump to transport slurry in the prior art, the cleanliness of the slurry can be guaranteed, which is beneficial to improving the printing quality. In addition, as the squeegee 200 moves on the screen, the slurry in the slurry storage chamber flows out, preventing the slurry from being exposed to air for a long time and solidifying, replacing the original ink-returning action with the printing action, reducing the ink-returning action, and improving the printing efficiency and quality.
[0044] Because the slurry contains volatile solvents, after the slurry stored in the slurry storage chamber 111 is placed for a period of time, the viscosity of the slurry increases and the fluidity decreases, which will cause the problem of broken grids and affect the printing quality. For this reason, continue to refer to Figure 1 , in some embodiments, the screen printing device further includes a dilution bucket 300. The dilution bucket 300 is connected to the slurry bucket through a flow valve. The dilution bucket 300 is provided with a liquid storage chamber for storing dilution solvent, and the liquid storage chamber is communicated with the slurry storage chamber 111. In this way, by controlling the flow valve, the dilution solvent in the dilution bucket 300 can enter the slurry storage chamber 111 of the slurry bucket to dilute the slurry, adjust the viscosity of the slurry, prevent the problem of broken grids caused by the slurry being too dry, and is beneficial to improving the printing quality of screen printing.
[0045] Figure 2 The following shows the structural schematic diagram of the printing cylinder provided by the embodiment of the present application. Refer to Figure 2 , in some embodiments, the screen printing device includes a printing cylinder 10. Inside the printing cylinder 10, a support column 20 is arranged along the axis of the printing cylinder 10. A plurality of spacer plates 30 are arranged between the inner wall of the printing cylinder 10 and the support column 20. The spacer plates 30 are arranged along the radial direction of the printing cylinder 10; the space formed by the side wall of the printing cylinder 10, the support column 20, and between two adjacent spacer plates 30 is configured as the slurry storage chamber 111.
[0046] It should be understood that a plurality of spacer plates 30 can divide the printing cylinder 10 into a plurality of slurry storage cavities 111, that is, the printing cylinder 10 includes a plurality of slurry barrels arranged circumferentially, and the cross-section of the slurry storage cavity 111 in each slurry barrel is fan-shaped. Among them, a plurality of spacer plates 30 can be evenly arranged between the inner wall of the printing cylinder 10 and the support column 20. In some specific embodiments, 3 spacer plates 30 are evenly arranged between the inner wall of the printing cylinder 10 and the support column 20. In this way, the 3 spacer plates 30 divide the printing cylinder 10 into 3 slurry storage cavities 111, and the central angle corresponding to the cross-section of each slurry storage cavity 111 is 120°. In some other specific embodiments, see Figure 4 , 2 spacer plates 30 are arranged between the inner wall of the printing cylinder 10 and the support column 20. In this way, the 2 spacer plates 30 divide the printing cylinder 10 into 2 slurry storage cavities 111, and the central angle corresponding to the cross-section of each slurry storage cavity 111 is 180°, that is, the cross-sectional shape of each slurry storage cavity 111 is semi-circular; of course, a plurality of spacer plates 30 can also be unevenly arranged between the inner wall of the printing cylinder 10 and the support column 20, and the specific distribution of the plurality of spacer plates 30 can be set according to actual use requirements.
[0047] In the screen printing device provided in this embodiment, the printing cylinder 10 is divided into a plurality of slurry storage cavities 111 by the spacer plates 30, and different slurries can be contained in the plurality of slurry storage cavities 111 to meet different printing requirements.
[0048] See Figure 2 , in some embodiments, a slurry output through-hole is provided at the bottom end of the slurry barrel, the first end of the slurry output pipe 120 is connected to the slurry output through-hole, and the bottom wall of the slurry storage cavity 111 is an inclined surface inclined towards the slurry output through-hole. In this way, the slurry in the slurry barrel can converge along the inclined surface towards the slurry output through-hole, reducing the slurry hanging on the inner wall of the slurry storage cavity 111.
[0049] Continue to see Figure 2 , in some specific embodiments, the bottom end of the slurry barrel is conical, and the slurry hanging on the side wall of the slurry storage cavity 111 is easy to slide along the side wall and the bottom wall of the slurry storage cavity 111 and converge into the slurry output through-hole.
[0050] In some embodiments, see Figure 1 , the slurry adding assembly further includes a motor and a stirring mechanism. The stirring mechanism includes a stirring shaft 152. The motor is installed on the barrel cover, the motor is connected to the first end of the stirring shaft 152, and the second end of the stirring shaft 152 is located in the slurry storage cavity 111. In this way, in the screen printing device provided in this embodiment, during operation, the motor is started, and the motor can drive the stirring shaft 152 to rotate. The stirring shaft 152 can mix and stir the slurry in the slurry barrel, making the texture of the slurry in the slurry barrel more uniform, which is beneficial to improving the printing quality.
[0051] Figure 3 The following shows a top view schematic diagram of the squeegee mechanism provided by the embodiment of the present application.Figure 4 The following shows a schematic cross-sectional view of the slurry scraping mechanism provided by the embodiment of the present application along Figure 2 the A-A direction. Refer to Figure 1 , Figure 3 and Figure 4 . In some embodiments, the motor is a two-way motor, and the inner wall cross-section of the slurry bucket is non-circular;
[0052] The stirring shaft 152 is coaxially connected with a lead screw 160;
[0053] The slurry adding assembly further includes a slurry scraping mechanism, which includes a slurry scraping ring 171 and a guiding member 172. The slurry scraping ring 171 is adapted to and in contact with the inner wall shape of the slurry bucket. The guiding member 172 is provided with a guiding through hole, and the lead screw 160 is passed through the guiding through hole. The guiding through hole is threadedly connected with the lead screw 160; the slurry scraping ring 171 and the guiding member 172 are connected by a connecting rib 173.
[0054] In this embodiment, when the motor is started, the motor drives the stirring shaft 152 to rotate. At the same time, the stirring shaft 152 also drives the lead screw 160 coaxially connected thereto to rotate. Since the guiding member 172 threadedly connected with the lead screw 160 is connected to the slurry scraping ring 171 through the connecting rib 173, the inner wall cross-section of the slurry bucket is non-circular, the slurry scraping ring 171 is adapted to and in contact with the inner wall shape of the slurry bucket, the inner wall of the slurry bucket restricts the freedom of circumferential movement of the slurry scraping ring 171, the guiding member 172 converts the rotational movement of the lead screw 160 into a linear movement along the axis of the lead screw 160, and at the same time, the guiding member 172 also drives the slurry scraping ring 171 and the connecting rib 173 to move up and down. When the slurry scraping ring 171 moves up and down, the slurry scraping ring 171 scrapes the residual slurry on the inner wall of the slurry bucket, and the scraped slurry converges with the slurry at the bottom of the slurry bucket under the action of gravity. Therefore, the screen printing device provided by this embodiment can scrape the slurry hanging on the inner wall of the slurry bucket while stirring the slurry, saving slurry; in addition, the slurry hanging on the inner wall of the slurry bucket is easy to dry and harden, which affects the quality of the slurry in the slurry bucket. Therefore, the screen printing device provided by this embodiment can improve the stability of the slurry quality in the slurry bucket by adding a slurry scraping mechanism.
[0055] It should be understood that in this embodiment, the motor is a bidirectional motor, which can rotate counterclockwise or clockwise. In a specific embodiment, when the motor rotates clockwise, the motor drives the stirring shaft 152 to rotate clockwise, and the lead screw 160 also rotates clockwise. The guide member 172 is threadedly connected to the lead screw 160. The guide member 172 converts the clockwise rotation of the lead screw 160 into a downward linear motion, and the slurry scraping ring 171 also scrapes downward along the inner wall of the slurry bucket to remove the slurry remaining on the inner wall of the slurry bucket. When the slurry scraping ring 171 moves to the end of its stroke, the motor reverses its rotation, that is, the motor rotates counterclockwise. The motor drives the stirring shaft 152 to rotate counterclockwise, and the lead screw 160 also rotates counterclockwise. The guide member 172 is threadedly connected to the lead screw 160. The guide member 172 converts the counterclockwise rotation of the lead screw 160 into an upward linear motion, and the slurry scraping ring 171 also moves upward along the inner wall of the slurry bucket. At this time, the slurry scraping ring 171 is mainly reset to the starting position of its stroke, so as to continue to move downward in the next step and continue to clean the inner wall of the slurry bucket by scraping the slurry. It should be noted that the stroke of the up and down linear motion of the slurry scraping ring 171 is related to the movement duration of the forward and reverse rotation of the motor. For example, when the motor rotates clockwise, the stroke of the slurry scraping ring 171 moving downward from the starting position is L1. This stroke L1 is related to the clockwise rotation time T1 of the motor, that is, the larger the clockwise rotation time T1 of the motor, the larger the stroke L1. On the contrary, the smaller the clockwise rotation time T1 of the motor, the smaller the stroke L1. Similarly, when the motor rotates counterclockwise, the stroke of the slurry scraping ring 171 moving upward from the starting position (the starting position at this time may be the end position of the downward movement of the slurry scraping ring 171) is L2. This stroke L2 is related to the counterclockwise rotation time T2 of the motor, that is, the larger the counterclockwise rotation duration T2 of the motor, the larger the stroke L2. On the contrary, the smaller the counterclockwise rotation time T2 of the motor, the smaller the stroke L2. Among them, the clockwise rotation duration T1 of the motor and the counterclockwise rotation duration T2 of the motor are not necessarily equal or unequal. The specific situation needs to be determined according to specific implementation requirements.
[0056] See Figure 1 , in some embodiments, the stirring mechanism further includes a stirring blade group. The stirring blade group is connected to the stirring shaft 152 and is located below the slurry scraping mechanism; the stirring blade group includes a plurality of stirring blades 153. The radial dimension of the stirring blade 153 along the stirring shaft 152 is smaller than the distance between the surface of the stirring shaft 152 and the side wall of the slurry bucket. The plurality of stirring blades 153 are evenly distributed on the surface of the stirring shaft 152; the stirring blade 153 extends along the radial direction of the stirring shaft 152. In the screen printing device provided in this embodiment, when the stirring assembly stirs the slurry in the slurry bucket, the stirring blade group is beneficial to improving the stirring efficiency.
[0057] In some embodiments, a lubricating functional layer is provided on the inner wall of the slurry bucket. In this way, the slurry hanging on the inner wall of the slurry bucket can be reduced.
[0058] Continue to refer to Figure 1 , in some embodiments, the dilution bucket 300 is provided with scales. In this way, it is convenient to know the change amount of the solution in the dilution bucket 300.
[0059] Continue to refer to Figure 1 , in some embodiments, the slurry bucket is provided with a pressure gauge 131 for monitoring the air pressure in the slurry storage chamber 111. In this way, the air pressure in the slurry storage chamber 111 is ensured to be within a preset range, ensuring the production safety during the printing process.
[0060] In summary, the screen printing device provided by the present application has at least achieved the following beneficial effects:
[0061] In the screen printing device provided by the present application, high-pressure gas is input through the second end of the high-pressure air inlet pipe 140. The high-pressure gas enters the slurry storage chamber 111 along the high-pressure air inlet pipe 140, and the pressure in the slurry storage chamber 111 increases, pressing the slurry into the slurry outlet pipe 120. The slurry enters the slurry storage chamber of the squeegee 200 along the slurry outlet pipe 120, and the slurry entering the slurry storage chamber flows out through the printing through-holes. When printing with the screen printing device in this embodiment, since clean high-pressure gas is used as the power source for the slurry flow to automatically add slurry to the slurry storage chamber of the squeegee 200, compared with the prior art method of using a transfer pump to transport the slurry, the cleanliness of the slurry can be ensured, which is conducive to improving the printing quality. In addition, as the squeegee 200 moves on the screen, the slurry in the slurry storage chamber flows out, preventing the slurry from being exposed to the air for a long time and solidifying, replacing the original ink return action with the printing action, reducing the ink return action, and improving the printing efficiency and quality.
[0062] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.
Claims
1. A screen printing device, characterized in that: It comprises at least one slurry adding component and a scraper arranged corresponding to the slurry adding component; The slurry adding assembly comprises a slurry barrel, a slurry discharge pipe, a barrel cover and a high-pressure air inlet pipe. The slurry barrel is provided with a slurry storage cavity for storing slurry. The first end of the slurry discharge pipe is connected to the bottom end of the slurry barrel, and the slurry discharge pipe is communicated with the slurry storage cavity. The scraper is connected to the second end of the slurry outlet pipe, the scraper is provided with a slurry storage chamber for accommodating the slurry, the slurry storage chamber is communicated with the slurry outlet pipe, and the bottom end of the scraper is provided with a printing through hole communicated with the slurry storage chamber; The top end of the slurry barrel is connected to the barrel cover, the first end of the high-pressure air inlet pipe is connected to the barrel cover, the high-pressure air inlet pipe is communicated with the slurry storage chamber, and the second end of the high-pressure air inlet pipe is used to input high-pressure gas.
2. The screen printing device according to claim 1, characterized in that: The screen printing device further comprises a dilution barrel, which is connected to the slurry barrel via a flow valve, and the dilution barrel is provided with a liquid storage chamber for storing a dilution solvent, and the liquid storage chamber is communicated with the slurry storage chamber.
3. The screen printing device according to claim 1, characterized in that: The screen printing device comprises a printing cylinder, wherein a support column arranged along the axis of the printing cylinder is arranged inside the printing cylinder, and a plurality of spacers are arranged between the inner wall of the printing cylinder and the support column, and the spacers are arranged along the radial direction of the printing cylinder; The space formed by the side wall of the printing cylinder, the support column and two adjacent spacer plates is configured as the pulp storage chamber.
4. The screen printing device according to claim 1, characterized in that: A slurry delivery through hole is provided at the bottom end of the slurry barrel, the first end of the slurry outlet pipe is connected to the slurry delivery through hole, and the bottom wall of the slurry storage cavity is an inclined surface inclined toward the slurry delivery through hole.
5. The screen printing device according to claim 1, characterized in that: The slurry adding assembly also includes a motor and a stirring mechanism, the stirring mechanism includes a stirring shaft, the motor is installed on the barrel cover, the motor is connected to the first end of the stirring shaft, and the second end of the stirring shaft is located in the slurry storage chamber.
6. The screen printing device according to claim 5, characterized in that: The inner wall cross section of the slurry barrel is non-circular; The stirring shaft is connected to a coaxially arranged screw rod; The slurry adding assembly also includes a scraping mechanism, which includes a scraping ring and a guide member. The scraping ring is adapted to the shape of the inner wall of the slurry barrel, and the scraping ring is in contact with the inner wall of the slurry barrel. The guide member has a guide through hole, the screw rod is inserted into the guide through hole, and the guide through hole is threadedly connected to the screw rod; the scraping ring is connected to the guide member by a connecting rib.
7. The screen printing device according to claim 6, characterized in that: The stirring mechanism further comprises a stirring blade group, the stirring blade group is connected to the stirring shaft, and the stirring blade group is located below the scraping mechanism; The stirring blade group includes a plurality of stirring blades, and the radial dimension of the stirring blades along the stirring shaft is smaller than the distance between the stirring shaft surface and the side wall of the slurry barrel; The plurality of stirring blades are evenly distributed on the surface of the stirring shaft, and the stirring blades are extended along the radial direction of the stirring shaft.
8. The screen printing device according to claim 1, characterized in that: The inner wall of the slurry barrel is provided with a lubricating functional layer.
9. The screen printing device according to claim 2, characterized in that: The dilution barrel is provided with a scale.
10. The screen printing device according to claim 1, characterized in that: The slurry barrel is provided with a pressure gauge for monitoring the air pressure of the slurry storage chamber.