Automatic HJT silk-screen printing silver paste adding device

Abstract

The utility model discloses an automatic HJT silk-screen printing silver paste adding device which comprises a bottle body used for containing silver paste. A discharging head is arranged at one end of the bottle body, and a driving assembly used for quantitatively driving silver paste to be discharged from the discharging head is mounted in the bottle body; the discharging head is provided with a discharging channel with a long-strip-shaped section, a plurality of through holes for discharging silver paste are evenly formed in the end, away from the bottle body, of the discharging channel at intervals, and the adjacent through holes are distributed in a staggered mode. According to the HJT silk-screen printing silver paste automatic adding device disclosed by the utility model, quantitative material driving is carried out through the arrangement of the discharging head of the discharging channel with the long-strip-shaped section and the cooperation of the multiple through holes distributed in a staggered manner and the driving assembly, so that large-area uniform adding of silver paste can be realized, namely uniform and efficient automatic adding of the silver paste is realized; and the printing efficiency and the printing effect are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of screen printing technology, and in particular to an automatic silver paste addition device for HJT screen printing. Background Technology

[0002] HJT solar cells typically use silver paste as the printing paste in the screen printing process. HJT screen printing silver paste is a viscous paste composed of high-purity metallic silver particles, binders, solvents, and additives. It has a high viscosity, which can reach between 300 and 400 Pa·s.

[0003] Currently, the printing silver paste used in HJT battery cell production is mainly added manually to the screen. However, manual addition of paste requires machine downtime, which affects production. Furthermore, the amount of silver paste added is difficult to control. Adding too little will affect production efficiency, while adding too much will result in the silver paste not being used up for a long time, causing the silver paste to dry and affect printing quality.

[0004] Based on this, the present invention proposes an automatic silver paste addition device for HJT screen printing to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this invention is to provide an automatic silver paste addition device for HJT screen printing, which enables uniform and efficient automatic addition of silver paste.

[0006] To solve the above-mentioned technical problems, this utility model provides an automatic silver paste adding device for HJT screen printing, including a bottle for holding silver paste;

[0007] The bottle has a discharge head at one end, and a drive assembly for quantitatively driving the silver paste to be discharged from the discharge head is installed inside the bottle.

[0008] The discharge head has a long, narrow discharge channel. At the end of the discharge channel away from the bottle body, there are multiple through holes evenly spaced for silver paste to be discharged. The through holes are staggered between adjacent ones.

[0009] Furthermore, the HJT screen printing silver paste automatic addition device also includes a spiral stirrer;

[0010] The spiral mixer includes a propeller blade and a drive motor;

[0011] The propeller blades are rotatably installed inside the discharge channel;

[0012] The drive motor is mounted on the outside of the bottle, and the output shaft of the drive motor is connected to the propeller blades via a transmission connection.

[0013] Furthermore, there are multiple propeller blades, the spacing between the multiple propeller blades is set within the discharge channel, and the multiple propeller blades are connected to the drive motor through a transmission component.

[0014] Furthermore, the drive assembly includes a piston and a ranging mechanism;

[0015] The piston sidewall is attached to the inner sidewall of the bottle and is movably disposed within the bottle to apply pressure to the silver paste.

[0016] An air inlet is provided on the side wall of the bottle body away from the discharge head. The air inlet is used to fill the bottle body with compressed air to drive the piston to move.

[0017] The ranging mechanism is used to measure the movement distance of the piston.

[0018] Furthermore, the ranging structure includes a laser ranging sensor installed inside the bottle;

[0019] The piston is equipped with a reflector for reflecting the signal from the laser rangefinder sensor.

[0020] Furthermore, a sealing ring is installed on the side wall of the piston.

[0021] Furthermore, the end of the bottle body away from the discharge head has a bottle cap, which is detachably mounted on the bottle body.

[0022] Furthermore, a sealing ring is installed on the inner wall of the bottle cap.

[0023] Furthermore, a fixing plate is provided on the bottle cap, and the fixing plate has multiple fixing holes.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] The HJT screen printing silver paste automatic addition device provided by this utility model, through the setting of the discharge head with a discharge channel with a long cross section, combined with multiple staggered through holes and drive components for quantitative material driving, can achieve uniform addition of silver paste over a large area, that is, to achieve uniform and efficient automatic addition of silver paste, effectively improving printing efficiency and printing effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the HJT screen printing silver paste automatic addition device in this embodiment of the present invention;

[0027] Figure 2 This is a cross-sectional schematic diagram of the HJT screen printing silver paste automatic addition device in an embodiment of this utility model;

[0028] Figure 3 This is a schematic diagram showing the distribution of through holes in an embodiment of this utility model;

[0029] Figure 4 This is a schematic diagram of the propeller blade in an embodiment of the present invention. Detailed Implementation

[0030] The HJT screen printing silver paste automatic addition device of this utility model will be described in more detail below with reference to the schematic diagram, which illustrates the preferred embodiment of this utility model. It should be understood that those skilled in the art can modify the utility model described herein while still achieving the advantageous effects of this utility model. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit this utility model.

[0031] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0032] like Figure 1 As shown in the figure, this utility model embodiment proposes an automatic silver paste adding device for HJT screen printing, including a bottle body 1 for containing silver paste; one end of the bottle body 1 has a discharge head 2, and a driving component for quantitatively driving the silver paste to be discharged from the discharge head 2 is installed inside the bottle body 1; the discharge head 2 has a discharge channel with an elongated cross-section, and a plurality of through holes 21 for discharging silver paste are evenly spaced at the end of the discharge channel away from the bottle body, in conjunction with reference to the figure. Figure 3 The adjacent through holes 21 are staggered.

[0033] In this embodiment, the discharge channel is provided with multiple through holes 21 at even intervals at the end away from the bottle for discharging silver paste, and the adjacent through holes 21 are staggered. That is, the silver paste outlet adopts a rectangular design with staggered round openings, which greatly improves efficiency and achieves uniform addition of paste to the entire screen.

[0034] In the above embodiments, in conjunction with reference to Figure 2 The driving assembly includes a piston 3 and a ranging mechanism; the sidewall of the piston 3 is attached to the inner sidewall of the bottle body 1 and is movably disposed within the bottle body 1 for applying pressure to the silver paste; an air inlet 4 is provided on the sidewall of the bottle body 1 away from the discharge head 2, and the air inlet 4 is used to fill the bottle body 1 with compressed air to drive the piston 3 to move; the ranging mechanism is used to measure the movement distance of the piston 3.

[0035] During operation, compressed air is injected into the sealed space above the piston 3 inside the bottle 1 through the air inlet 4. Under the action of the compressed air, the piston 3 moves closer to the discharge head 2, thereby squeezing the silver paste into the discharge channel of the discharge head 2, and then discharging it from the bottle 1 through the through hole 21. During the movement of the piston 3, the distance measuring mechanism measures the movement distance of the piston 3 in real time. When the piston 3 moves to the specified distance, the injection of compressed air into the bottle 1 stops, and the sealed space above the piston 3 is evacuated, realizing the automatic quantitative addition of silver paste.

[0036] In the above implementation process, as an example, the ranging structure includes a laser ranging sensor 5 installed inside the bottle body 1; a reflector 6 is installed on the piston 3 to reflect the signal of the laser ranging sensor 5. Through the arrangement of the laser ranging sensor 5 and the reflector 6, the real-time measurement of the movement distance of the piston 3 is achieved. How the laser ranging sensor 5 and the reflector 6 specifically achieve real-time measurement of the object's movement distance is existing technology and will not be elaborated upon here.

[0037] In the above implementation process, a sealing ring 7 is further installed on the side wall of the piston 3 to ensure the sealing between the piston 3 and the bottle body 1.

[0038] In the above embodiment, the end of the bottle body 1 away from the discharge head 2 has a bottle cap 8, which is detachably installed on the bottle body 1. By removing the bottle cap 8, the piston 3 can be removed from the bottle body 1 for adding silver paste into the bottle body 1 and for maintenance and cleaning of the bottle body 1 and the piston 3.

[0039] Furthermore, a sealing ring 7 is installed on the inner wall of the bottle cap 8 to ensure the sealing between the bottle cap 8 and the bottle body 1.

[0040] Furthermore, to achieve stable installation of the device, a fixing plate 9 is provided on the bottle cap 8, and multiple fixing holes are opened on the fixing plate 9. The device is stably installed by passing bolts through the fixing holes.

[0041] In a preferred embodiment, the HJT screen printing silver paste automatic addition device further includes a spiral stirrer; the spiral stirrer includes a propeller blade 10 and a drive motor 11; the propeller blade 10 is rotatably mounted in the discharge channel; the drive motor 11 is mounted outside the bottle body 1, and the output shaft of the drive motor 11 is drively connected to the propeller blade 10. The structure of the propeller blade 10 is as follows: Figure 4 As shown, by setting a propeller blade 10 in the discharge channel and driving the propeller blade 10 to rotate with the drive motor 11, the silver paste can be stirred, improving the fluidity of the silver paste and thus reducing the risk of the silver paste clogging the discharge channel.

[0042] Preferably, there are multiple propeller blades 10, which are spaced apart within the discharge channel, and are all connected to the drive motor 11 via a transmission component 12. The use of multiple propeller blades 10 further improves the fluidity of the silver paste, and the sharing of a single drive motor 11 by multiple propeller blades 10 achieves energy savings.

[0043] Specifically, the propeller blade 10 is preferably located at the corner of the discharge channel.

[0044] In the above implementation process, the transmission component 12 can adopt a gear set, pulley and transmission belt or other transmission components to achieve the purpose of one drive source driving multiple components to rotate synchronously, and no specific restrictions are made here.

[0045] In summary, the HJT screen printing silver paste automatic addition device provided by this utility model has at least the following advantages compared with the prior art:

[0046] The HJT screen printing silver paste automatic addition device provided by this utility model, through the setting of the discharge head with a discharge channel with a long cross section, combined with multiple staggered through holes and drive components for quantitative material driving, can achieve uniform addition of silver paste over a large area, that is, to achieve uniform and efficient automatic addition of silver paste, effectively improving printing efficiency and printing effect.

[0047] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An automatic silver paste adding device for HJT screen printing, characterized in that, Including the bottle used to contain the silver paste; The bottle has a discharge head at one end, and a drive assembly for quantitatively driving the silver paste to be discharged from the discharge head is installed inside the bottle. The discharge head has a long, narrow discharge channel. At the end of the discharge channel away from the bottle body, there are multiple through holes evenly spaced for silver paste to be discharged. The through holes are staggered between adjacent ones.

2. The HJT screen printing silver paste automatic addition device as described in claim 1, characterized in that, It also includes a spiral mixer; The spiral mixer includes a propeller blade and a drive motor; The propeller blades are rotatably installed inside the discharge channel; The drive motor is mounted on the outside of the bottle, and the output shaft of the drive motor is connected to the propeller blades via a transmission connection.

3. The automatic silver paste addition device for HJT screen printing as described in claim 2, characterized in that, The propeller blades are multiple, and the spacing between the multiple propeller blades is set within the discharge channel. The multiple propeller blades are connected to the drive motor through a transmission component.

4. The automatic silver paste addition device for HJT screen printing as described in claim 1, characterized in that, The drive assembly includes a piston and a ranging mechanism; The piston sidewall is attached to the inner sidewall of the bottle and is movably disposed within the bottle to apply pressure to the silver paste. An air inlet is provided on the side wall of the bottle body away from the discharge head. The air inlet is used to fill the bottle body with compressed air to drive the piston to move. The ranging mechanism is used to measure the movement distance of the piston.

5. The automatic silver paste addition device for HJT screen printing as described in claim 4, characterized in that, The ranging mechanism includes a laser ranging sensor installed inside the bottle; The piston is equipped with a reflector for reflecting the signal from the laser rangefinder sensor.

6. The automatic silver paste addition device for HJT screen printing as described in claim 4, characterized in that, A sealing ring is installed on the side wall of the piston.

7. The automatic silver paste addition device for HJT screen printing as described in claim 1, characterized in that, The bottle body has a cap at the end away from the discharge head, and the cap is detachably mounted on the bottle body.

8. The automatic silver paste addition device for HJT screen printing as described in claim 7, characterized in that, A sealing ring is installed on the inner wall of the bottle cap.

9. The automatic silver paste addition device for HJT screen printing as described in claim 7, characterized in that, The bottle cap is provided with a fixing plate, and the fixing plate has multiple fixing holes.

Images