Screen printing machine for secondary printing

Abstract

The screen printing machine for secondary printing comprises a bearing machine body, a printing mechanism, a drying mechanism, an adsorption mechanism and a silver paste coating mechanism, the bearing machine body is provided with a printing station, a drying station and a feeding station, and the printing station, the drying station and the feeding station are sequentially arranged in the circumferential direction of a rotary disc; a bearing piece is arranged on the rotary disc and used for fixing a to-be-printed battery piece, the bearing piece rotates along with the rotary disc and is used for sequentially switching among a printing station, a drying station and a feeding station, and the printing mechanism is located above the printing station and used for conducting printing work on the to-be-printed battery piece on the bearing piece. The drying mechanism is located above the drying station and used for drying the printed battery pieces, the adsorption mechanism is connected with the bearing piece and provides negative pressure to fix the battery pieces, and the silver paste coating mechanism is connected with the printing mechanism. The screen printing machine for secondary printing has the advantages of being high in printing efficiency and small in printing precision influence.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic printing, in particular to a screen printer for secondary printing. Background Art

[0002] Solar cell screen printing improves the aspect ratio of the grid lines through secondary printing. The related technology uses multiple printers for printing, which requires multiple printers to maintain printing consistency. Multiple calibrations are required during the printing process, which reduces printing efficiency and restricts printing accuracy. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a secondary printing screen printer, which has the advantages of high printing efficiency and little impact on printing accuracy.

[0005] According to the screen printer for secondary printing of the embodiment of the present invention, the screen printer for secondary printing includes a carrier body, a printing mechanism, a drying mechanism, an adsorption mechanism and a silver paste coating mechanism, the carrier body is provided with a printing station, a drying station and a feeding station, the printing station, the drying station and the feeding station are arranged in sequence in the circumferential direction of the turntable, the turntable is provided with a carrier for fixing the battery cells to be printed, the carrier rotates with the turntable to switch in sequence between the printing station, the drying station and the feeding station, the printing mechanism is located above the printing station to print the battery cells to be printed on the carrier, the drying mechanism is located above the drying station to dry the battery cells after printing, the adsorption mechanism is connected to the carrier and provides negative pressure to fix the battery cells, and the silver paste coating mechanism is connected to the printing mechanism to print the printed battery cells again.

[0006] The screen printer with secondary printing according to the embodiment of the present invention has the advantages of high printing efficiency and little influence on printing accuracy.

[0007] In some embodiments, the secondary printing screen printer further includes a rotating seat, wherein the rotating seat connects the printing mechanism and the silver paste coating mechanism to switch the mechanism above the printing station.

[0008] In some embodiments, the silver paste coating mechanism includes a silver paste coating plate and a coating tube, a coating trough is provided in the center of the silver paste coating plate, and a plurality of discharge pipes are provided on the coating tube, and the plurality of discharge pipes are all connected to the coating trough for conveying silver paste.

[0009] In some embodiments, the shape of the coating trough is adapted to the shape of the battery cell to be printed, and a plurality of coating holes are provided on the coating trough, and the coating holes are connected to the discharge pipe.

[0010] In some embodiments, the coating holes are distributed in an array within the coating tank.

[0011] In some embodiments, a silver paste recovery device is disposed beside the carrier body, and the silver paste recovery device includes a scraper plate, a rotating member and a base, and the scraper plate is pivotally connected to the base through the rotating member.

[0012] In some embodiments, a recovery tank is provided on the base, and the recovery tank is located below the scraper plate for recovering silver paste.

[0013] In some embodiments, the base further includes a recovery box, and the recovery box is connected to the recovery tank through a pipeline.

[0014] In some embodiments, a positioning block is disposed on the carrier, and the positioning block is arranged around the battery sheet to be printed.

[0015] In some embodiments, a plurality of adsorption holes are provided on the carrier, and the adsorption mechanism includes a negative pressure pipeline and a vacuum pump, and the vacuum pump is connected to the adsorption holes through the negative pressure pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a schematic top view of a carrier body of a screen printing machine for secondary printing according to an embodiment of the present invention.

[0017] Figure 2 It is a structural schematic diagram of a printing mechanism and a silver paste coating mechanism of a screen printer for secondary printing according to an embodiment of the present invention.

[0018] Figure numerals: 1. turntable; 2. carrier; 3. printing station; 4. feeding station; 5. drying station; 6. rotating seat; 7. silver paste coating plate; 8. coating tube; 9. coating tank; 10. scraper plate; 11. rotating part; 12. base; 13. recovery tank; 14. recovery box; 15. positioning block; 16. adsorption hole. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] According to the screen printer for secondary printing of the embodiment of the present invention, the screen printer for secondary printing includes a carrier body, a printing mechanism, a drying mechanism, an adsorption mechanism and a silver paste coating mechanism. A printing station 3, a drying station 5 and a feeding station 4 are arranged on the carrier body. The printing station 3, the drying station 5 and the feeding station 4 are arranged in sequence in the circumferential direction of the turntable 1. A carrier 2 is arranged on the turntable 1 to fix the battery cells to be printed. The carrier 2 rotates with the turntable 1 to switch between the printing station 3, the drying station 5 and the feeding station 4 in sequence. The printing mechanism is located above the printing station 3 to print the battery cells to be printed on the carrier 2. The drying mechanism is located above the drying station 5 to dry the battery cells after printing. The adsorption mechanism is connected to the carrier 2 and provides negative pressure to fix the battery cells. The silver paste coating mechanism is connected to the printing mechanism to print the printed battery cells again. The printing mechanism and the silver paste coating mechanism on the printing station 3 share a working area, which improves printing accuracy on the one hand and printing efficiency on the other hand. After printing is completed, as the turntable 1 rotates, the battery cells on the carrier 2 rotate relative to the drying station 5 under the drying of the drying mechanism, and rotate to the feeding station 4. The feeding station 4 is used to receive and deliver the battery cells. After passing through the feeding station 4, the battery cells return to the printing station 3, and the silver paste coating mechanism performs a second printing on the battery cells for re-coating. After coating is completed, the battery cells are dried by the drying mechanism, and the robot arm or other conveying device on the feeding station 4 removes the battery cells and replaces other battery cells to be printed. The printing station 3, feeding station 4, and drying station 5 are specific areas located above the turntable 1 and do not move with the turntable 1.

[0021] The screen printer with secondary printing according to the embodiment of the present invention has the advantages of high printing efficiency and little influence on printing accuracy.

[0022] In some embodiments, the secondary printing screen printer further includes a rotating seat 6 , which is connected to the printing mechanism and the silver paste coating mechanism to switch the mechanism above the printing station 3 .

[0023] Specifically, the rotating seat 6 is connected to the printing mechanism and the silver paste coating mechanism through connecting rods respectively. The top of the rotating seat 6 is connected to the output end of the driving component. The driving component can be a servo motor, etc. The motor drives the rotating seat 6 to rotate to complete the switching of the printing mechanism and the silver paste coating mechanism, thereby improving production efficiency and facilitating the cleaning and maintenance of the printing mechanism and the silver paste coating mechanism.

[0024] In some embodiments, the silver paste coating mechanism includes a silver paste coating plate 7 and a coating tube 8. A coating tank 9 is arranged in the center of the silver paste coating plate 7. A plurality of discharge pipes are arranged on the coating tube 8. The plurality of discharge pipes are all connected to the coating tank 9 to transport the silver paste.

[0025] Specifically, a flow control valve is provided on the coating tube 8 to control the flow of silver paste. The flow of silver paste is controlled to adjust the coating amount of silver paste in the coating tank 9. The coating amount of silver paste can be adjusted according to different printing patterns and battery cell types to improve printing accuracy and efficiency.

[0026] In some embodiments, the shape of the coating slot 9 is adapted to the shape of the battery cell to be printed, and a plurality of coating holes are provided on the coating slot 9, and the coating holes are connected to the discharge pipe.

[0027] Specifically, there can be multiple silver paste coating plates 7, each of which is provided with coating slots 9 of different shapes to meet the coating requirements of different battery cells. The coating holes are arranged according to the shape of the battery cell, and the printing patterns of different shapes can improve the coating accuracy and achieve more refined pattern printing.

[0028] In some embodiments, the coating holes are distributed in an array within the coating tank 9 .

[0029] Specifically, the coating holes may be distributed in a rectangular array, an annular array, or other distribution arrays that are conducive to uniform flow of the silver paste.

[0030] In some embodiments, a silver paste recovery device is disposed beside the carrier body, and the silver paste recovery device includes a scraper plate 10 , a rotating member 11 and a base 12 , and the scraper plate 10 is pivotally connected to the base 12 via the rotating member 11 .

[0031] Specifically, the cross-sectional shape of the scraper disc 10 can be a Lello triangle shape. As the scraper disc 10 rotates, the coating groove 9 is scraped flat. The rotating part 11 includes a servo motor and a rotating shaft. The rotating shaft is connected to the scraper disc 10. The servo motor drives the rotating shaft to rotate. The base 12 is located under the scraper disc 10 to receive the fallen silver paste for easy recycling and reuse.

[0032] In some embodiments, a recovery tank 13 is disposed on the base 12 , and the recovery tank 13 is located below the scraper plate 10 for recovering the silver paste.

[0033] Specifically, a filter screen or a filter membrane is arranged in the recovery tank 13 to remove impurities and improve the quality of the recovered silver paste. The area of ​​the recovery tank 13 corresponding to the scraper plate 10 is an annular recovery tank 13 or a rectangular recovery tank 13.

[0034] In some embodiments, the base 12 further includes a recovery box 14 , and the recovery box 14 is connected to the recovery tank 13 through a pipeline.

[0035] Specifically, the recovery box 14 is located at the bottom of the base 12, and the pipeline is connected to the recovery tank 13 to collect the silver paste and send the silver paste to the recovery box 14 for subsequent processing.

[0036] In some embodiments, a positioning block 15 is disposed on the carrier 2 , and the positioning block 15 is arranged around the battery sheet to be printed.

[0037] Specifically, the positioning block 15 is annular or rectangular, and is arranged around the battery cell to prevent the battery cell from moving relative to the carrier 2. The positioning block 15 also facilitates the printing mechanism and the silver paste coating mechanism to calibrate their own positions. Optionally, a limit switch is set on the positioning block 15. When the printing mechanism or the silver paste coating mechanism descends to touch the limit switch, the positioning is completed and the subsequent process is carried out.

[0038] In some embodiments, a plurality of adsorption holes are provided on the carrier 2, and the adsorption mechanism includes a negative pressure pipeline and a vacuum pump, and the vacuum pump is connected to the adsorption holes through the negative pressure pipeline.

[0039] Specifically, the adsorption holes are used to provide negative pressure, and a plurality of adsorption holes are distributed in a rectangular array on the carrier 2 to adsorb the battery cells to prevent the battery cells from moving.

[0040] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A secondary printing screen printer, characterized in that: include: A carrier body, on which a printing station, a drying station and a feeding station are arranged, the printing station, the drying station and the feeding station are arranged in sequence in the circumferential direction of the turntable, a carrier is arranged on the turntable for fixing the battery sheet to be printed, and the carrier rotates with the turntable to switch in sequence between the printing station, the drying station and the feeding station; A printing mechanism, the printing mechanism is located above the printing station and is used for printing the battery sheet to be printed on the carrier; A drying mechanism, the drying mechanism is located above the drying station and is used to dry the battery cells after the printing operation; An adsorption mechanism, the adsorption mechanism is connected to the carrier and provides negative pressure to fix the battery cell; A silver paste coating mechanism is connected to the printing mechanism to re-print the printed battery cell.

2. The screen printing machine for secondary printing according to claim 1, characterized in that: It also includes a rotating seat, which connects the printing mechanism and the silver paste coating mechanism to switch the mechanism above the printing station.

3. The screen printing machine for secondary printing according to claim 1, characterized in that: The silver paste coating mechanism comprises a silver paste coating plate and a coating tube. A coating trough is arranged in the center of the silver paste coating plate. A plurality of discharge pipes are arranged on the coating tube. The plurality of discharge pipes are all connected to the coating trough for conveying silver paste.

4. The screen printer for secondary printing according to claim 3, characterized in that: The shape of the coating trough is adapted to the shape of the battery sheet to be printed, and a plurality of coating holes are arranged on the coating trough, and the coating holes are connected to the discharge pipe.

5. The screen printer for secondary printing according to claim 4, characterized in that: The coating holes are distributed in an array in the coating tank.

6. The screen printer for secondary printing according to claim 1, characterized in that: A silver paste recovery device is arranged beside the carrier body, and the silver paste recovery device comprises a scraper plate, a rotating member and a base, and the scraper plate is pivotally connected to the base through the rotating member.

7. The screen printer for secondary printing according to claim 6, characterized in that: A recovery tank is arranged on the base, and the recovery tank is located below the scraper plate and is used for recovering silver paste.

8. The screen printer for secondary printing according to claim 7, characterized in that: It also includes a recovery box, which is connected to the recovery tank through a pipeline.

9. The screen printer for secondary printing according to claim 1, characterized in that: A positioning block is arranged on the carrier, and the positioning block is arranged around the battery sheet to be printed.

10. The screen printer for secondary printing according to claim 1, characterized in that: A plurality of adsorption holes are arranged on the bearing member, and the adsorption mechanism comprises a negative pressure pipeline and a vacuum pump, and the vacuum pump is connected with the adsorption holes through the negative pressure pipeline.

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