Screen printing device and solar cell dispensing device

Abstract

The utility model provides a screen printing device and a solar cell dispensing device. The screen printing device comprises a printing screen, a driving mechanism and a supporting and adjusting mechanism. The supporting adjusting mechanism comprises a first supporting piece, a second supporting piece and a plurality of telescopic elastic connecting pieces, the multiple elastic connecting pieces are arranged between the first supporting piece and the second supporting piece at intervals, and the two ends of each elastic connecting piece are connected to the first supporting piece and the second supporting piece correspondingly. The driving mechanism is used for driving the first supporting piece to move towards the second supporting piece, the second supporting piece is provided with a printing stock supporting face away from the first supporting piece, and the printing screen is arranged on the side, away from the first supporting piece, of the printing stock supporting face. The plurality of elastic connecting pieces in the screen printing device can play a role in buffering, and the contact uniformity between the printing screen and the printing stock is improved, so that the stability of the amount of slurry printed on the printing stock is improved, and the stability and yield of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a screen printing device and a solar cell glue dispensing device. Background Art

[0002] Screen printing is a printing technology that can print a specific pattern. Screen printing usually requires a screen with a specific pattern. When printing, the substrate to be printed is placed on one side of the screen, and the slurry is poured on the other side of the screen. A scraper or other device is used to squeeze the slurry through the mesh of the screen onto the substrate to form a pattern on the substrate corresponding to the screen pattern. Screen printing has been widely used in many fields.

[0003] The screen has a certain elasticity. When screen printing is performed, it is usually necessary to apply pressure to the screen through a scraper to deform the screen, so that the compressed part of the screen is close to the substrate. However, in the actual printing process, it is usually difficult to achieve a completely uniform fit between the screen and the substrate. For example, the middle part of the substrate can fit more closely to the screen, while the edge part is difficult to achieve a complete fit. This leads to large fluctuations in the amount of slurry printed in different areas of the substrate. For devices such as solar cells, the difference in the amount of slurry will affect the stability of the device, thereby reducing the yield of the device. Utility Model Content

[0004] Based on this, in view of the problems existing in the above-mentioned background technology, it is necessary to provide a screen printing device to improve the stability of the amount of slurry printed on the substrate, thereby improving the stability and yield of the device.

[0005] In one aspect, according to some embodiments of the present disclosure, a screen printing device includes a printing screen, a driving mechanism, and a supporting and adjusting mechanism;

[0006] The support adjustment mechanism comprises a first support member, a second support member and a plurality of retractable elastic connecting members, wherein the plurality of elastic connecting members are arranged between the first support member and the second support member at intervals, and two ends of the elastic connecting member are respectively connected to the first support member and the second support member;

[0007] The driving mechanism is used to drive the first support member to move toward the second support member, the second support member has a substrate supporting surface away from the first support member, and the printing screen is arranged on a side of the substrate supporting surface away from the first support member.

[0008] In some embodiments of the present disclosure, the support adjustment mechanism further includes a guide column, which is fixedly connected to one of the first support member and the second support member, and the guide column passes through the other of the first support member and the second support member.

[0009] In some embodiments of the present disclosure, the support adjustment mechanism includes a plurality of guide posts, the elastic connector is a spring, and each of the elastic connectors is sleeved on at least one of the guide posts.

[0010] In some embodiments of the present disclosure, the second support member includes a connecting plate and a plurality of support plates, one side surface of the connecting plate is connected to the elastic connecting member, the support plate is arranged on a side of the connecting plate away from the elastic connecting member, and the plurality of support plates are arranged in parallel and at intervals on the connecting plate.

[0011] In some embodiments of the present disclosure, the support plate has a top end away from the connecting plate, the top ends of multiple support plates constitute the substrate support surface, and at least one support plate is provided with a long strip-shaped make-way groove with a notch located on the top end.

[0012] In some embodiments of the present disclosure, the screen printing device also includes a conveying mechanism, which includes a conveyor belt, and the conveyor belt is arranged between two adjacent support plates, or the conveyor belt is arranged on a side of one support plate away from the other support plate.

[0013] In some embodiments of the present disclosure, the first support member has a first connecting surface, and the second support member has a second connecting surface. The first connecting surface and the second connecting surface are respectively connected to two ends of the elastic connecting member, and the first connecting surface and the second connecting surface are both planar and arranged in parallel.

[0014] In some embodiments of the present disclosure, there are four elastic connectors, and the four elastic connectors are respectively arranged on four vertices of a rectangle on the first connecting surface.

[0015] In some embodiments of the present disclosure, the elastic connecting member is selected from a rectangular spring.

[0016] On the other hand, the present disclosure further provides a solar cell dispensing device, which includes a screen printing device as described in any of the above embodiments, wherein the substrate support surface is used to support the solar cell, and the opening pattern on the printing screen corresponds to the area where the gate electrode on the solar cell is located.

[0017] The screen printing device of at least one of the above-mentioned embodiments includes a printing screen, a driving mechanism and a support and adjustment mechanism. Among them, the support and adjustment mechanism includes a first support member, a second support member and a plurality of retractable elastic connectors. Under the action of the driving mechanism, the first support member can move toward the second support member. On the one hand, the elastic connector can drive the second support member and the substrate as a whole to move toward the printing screen. On the other hand, when the second support member is subjected to pressure from the printing screen, the pressure in the area where the fit is closer is greater, so that the corresponding elastic connector is compressed more, and the pressure in other areas is smaller, so that the corresponding elastic connector is compressed less. Therefore, the multiple elastic connectors in the screen printing device can play a buffering role, improve the contact uniformity between the printing screen and the substrate, thereby improving the stability of the amount of slurry printed on the substrate, and then improving the stability and yield of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a screen printing device disclosed in the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the support plate;

[0020] Figure 3 It is a structural schematic diagram of a solar cell dispensing device;

[0021] Figure 4 for Figure 3 A schematic top view of a solar cell dispensing device;

[0022] Figure 5 for Figure 4 Schematic side view at the middle edge AA'.

[0023] 100, printing screen; 200, driving mechanism; 300, supporting and adjusting mechanism; 310, first supporting member; 320, second supporting member; 321, connecting plate; 322, supporting plate; 3220, giving way groove; 330, elastic connecting member; 340, guide column; 400, substrate; 500, conveyor belt. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively in combination with the embodiments and the effect diagrams. The embodiments provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed" to another element, it may be directly fixed to the other element, or it may be fixed to the other element through an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element, or there may be an intermediate element between the two elements. In addition, in the description of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated connection. For example, it may be a mechanical connection or an electrical connection. For example, it may be a direct connection, an indirect connection through an intermediate element, or the internal connection of the two elements. It should be understood that those skilled in the art can understand the specific meanings of the above terms according to the specific circumstances without causing ambiguity.

[0026] Unless otherwise specified, in the description of the present invention, terms indicating orientation or positional relationship, such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside", are based on the orientation or positional relationship shown in the drawings of the utility model. They are only for the convenience and simplification of the description of the content of the utility model and to help readers understand the description in conjunction with the drawings. They do not limit or imply a specific orientation that the device or element referred to must have, and therefore should not be understood as a limitation on the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the implementation of the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items. "Multiple" herein includes a combination of two or more than two items.

[0028] The present disclosure provides a screen printing device, which includes a printing screen, a driving mechanism and a support adjustment mechanism. The support adjustment mechanism includes a first support member, a second support member and a plurality of retractable elastic connectors. The plurality of elastic connectors are arranged between the first support member and the second support member at intervals, and the two ends of the elastic connectors are respectively connected to the first support member and the second support member. The driving mechanism is used to drive the first support member to move toward the second support member, the second support member has a substrate support surface away from the first support member, and the printing screen is arranged on a side of the substrate support surface away from the first support member.

[0029] The screen printing device of this embodiment includes a printing screen, a driving mechanism and a support adjustment mechanism. Among them, the support adjustment mechanism includes a first support member, a second support member and a plurality of retractable elastic connectors. Under the action of the driving mechanism, the first support member can move toward the second support member. On the one hand, the elastic connector can drive the second support member and the substrate to move toward the printing screen as a whole. On the other hand, when the second support member is subjected to pressure from the printing screen, the pressure in the area where the fit is tighter is greater, so that the compression amount of the elastic connector in this area is greater, and the pressure in other areas is smaller, so that the compression amount of the elastic connector in this area is smaller. By adjusting the compression amount of multiple elastic connectors, the contact between the printing screen and the substrate can be made more uniform, thereby improving the stability of the amount of slurry printed on the substrate, and then improving the stability and yield of the device.

[0030] Further, Figure 1 Schematic diagram of the structure of a screen printing device disclosed in the present invention. Figure 1 As shown, in this embodiment, the screen printing device includes a printing screen 100, a driving mechanism 200 and a support adjustment mechanism 300. The support adjustment mechanism 300 includes a first support member 310, a second support member 320 and a plurality of retractable elastic connectors 330, wherein the plurality of elastic connectors 330 are arranged between the first support member 310 and the second support member 320 at intervals, and the two ends of the elastic connectors 330 are respectively connected to the first support member 310 and the second support member 320. The driving mechanism 200 can drive the first support member 310 to move toward the second support member 320, and the second support member 320 has a substrate support surface away from the first support member 310, and the printing screen 100 is arranged on the side of the substrate support surface away from the first support member 310.

[0031] Reference Figure 1 As shown, in this embodiment, the second support member 320 can be arranged above the first support member 310, and the driving mechanism 200 can drive the first support member 310 to perform a lifting action, so that the first support member 310 moves toward the second support member 320. In actual use, the substrate 400 can be arranged between the second support member 320 and the printing screen 100, specifically located on the substrate support surface. As the driving mechanism 200 drives the first support member 310 to move toward the second support member 320, the second support member 320 also moves toward the printing screen 100. When the substrate 400 contacts the printing screen 100, the second support member 320 begins to be subjected to pressure. The compression amount of the elastic connecting member 330 at different positions is related to the pressure between the printing screen 100 and the second support member 320.

[0032] Reference Figure 1As shown, as some examples of this embodiment, the support adjustment mechanism 300 further includes a guide post 340, the guide post 340 is fixedly connected to one of the first support member 310 and the second support member 320, and the guide post 340 is movably connected to the other of the first support member 310 and the second support member 320. The movably connected manner may be: the guide post 340 is disposed through the other of the first support member 310 and the second support member 320.

[0033] It can be understood that, by means of fixed connection and movable connection, the displacement of the second support member 320 in a direction intersecting with the axial direction of the elastic connecting member 330 can be limited, for example, the displacement of the second support member 320 in the horizontal direction can be limited, thereby ensuring as much as possible that the elastic connecting member 330 only performs telescopic movement along its axial direction, which can minimize the misalignment between the printing material 400 and the printing screen 100 during movement, thereby ensuring the accuracy of the printed pattern.

[0034] Reference Figure 1 As shown, in this embodiment, the top end of the guide column 340 can be fixedly connected to the second support member 320 and penetrated into the first support member 310. The bottom end of the guide column 340 can be located on a side of the first support member 310 away from the second support member 320.

[0035] Reference Figure 1 As shown in some examples of this embodiment, the support adjustment mechanism 300 includes a plurality of guide posts 340. The elastic connector 330 is a spring. Each elastic connector 330 is sleeved on at least one guide post 340. Further, each elastic connector 330 is sleeved on one guide post 340. The sleeved spring on the guide post 340 can further avoid radial deviation of the spring, thereby further reducing the misalignment between the substrate 400 and the printing screen 100 during the movement.

[0036] Reference Figure 1 As shown, as some examples of this embodiment, the second support member 320 includes a connecting plate 321 and a plurality of support plates 322. One side of the connecting plate 321 is connected to the elastic connecting member 330. The support plate 322 is arranged on the side of the connecting plate 321 away from the elastic connecting member 330, and a plurality of support plates 322 are arranged in parallel and at intervals on the connecting plate 321. Among them, the connecting plate 321 is used to connect the elastic connecting member 330 and support a plurality of support plates 322 arranged at intervals, and the plurality of support plates 322 are used to jointly support the substrate 400. On the one hand, the plurality of support plates 322 can improve the uniformity of the force on the substrate 400, and on the other hand, the plurality of support plates 322 can also avoid some functional structures on the surface of the substrate 400 as much as possible, thereby reducing the damage to the substrate 400.

[0037] Reference Figure 1As shown, in this example, the connecting plate 321 may be arranged horizontally, and the supporting plates 322 may be arranged vertically, and each supporting plate 322 is arranged perpendicular to the connecting plate 321 .

[0038] Reference Figure 1 As shown, in this example, a plurality of support plates 322 are arranged parallel to each other.

[0039] Figure 2 for Figure 1 Schematic diagram of the support plate structure. Figure 2 As shown, in this example, the support plate 322 has an end face away from the connecting plate 321, and the end faces of the plurality of support plates 322 form a substrate support surface, and a long strip-shaped relief groove 3220 is provided on the end face of at least one support plate 322. The support plate 322 can be used to support a substrate 400 such as a solar cell. The surface of the solar cell has dense grid line electrodes, and the relief groove 3220 can be used to reduce the contact area between the end face of the support plate 322 and the solar cell, and can also be used to accommodate the grid line electrodes on the surface of the solar cell, thereby reducing or avoiding damage to the substrate 400 such as the solar cell by the support plate 322.

[0040] Reference Figure 2 As shown, as some examples of this embodiment, the clearance groove 3220 can be a through groove.

[0041] Reference Figure 1 As shown in some examples of this embodiment, the screen printing device further includes a conveying mechanism, and the conveying path of the conveying mechanism passes through the area between the printing screen 100 and the support and adjustment mechanism 300. It can be understood that the conveying mechanism is used to carry the substrate 400 to be printed and convey it to the position between the printing screen 100 and the support and adjustment mechanism 300, so as to facilitate the screen printing device to print the substrate 400.

[0042] Reference Figure 1 As shown, as some examples of this embodiment, the conveying mechanism includes a conveyor belt 500, and the conveyor belt 500 is arranged between two adjacent support plates 322, or the conveyor belt 500 is arranged on the side of the outermost support plate 322 away from other support plates 322. The conveyor belt 500 is arranged on one side of the support plate 322 or between two adjacent support plates 322, which can avoid the interference of the support plate 322 on the setting position of the conveyor belt 500, and ensure the normal operation of the conveyor belt 500.

[0043] Further, refer to Figure 1 As shown, in this example, the conveying mechanism may include a plurality of conveyor belts 500. The plurality of conveyor belts 500 may be arranged in parallel and at intervals to ensure the smooth conveyance of the substrate 400.

[0044] Reference Figure 1 As shown, as some examples of this embodiment, the first support member 310 has a first connection surface. The second support member 320 has a second connection surface. The first connection surface and the second connection surface are respectively connected to the two ends of the elastic connection member 330. The first connection surface and the second connection surface are both planar and parallel. The use of the first connection surface and the second connection surface that are planar and parallel can improve the stability of the elastic connection member 330 during the expansion and contraction process, further reduce the deviation of the substrate 400 caused by instability, and thus improve the accuracy of the pattern printed by the screen printing device.

[0045] Further, in this example, the first support member 310 may be plate-shaped, and the first connection surface may be the surface of the first support member 310 close to the second support member 320. The second support member 320 includes a connection plate 321, and the second connection surface may be the surface of the connection plate 321 close to the first support member 310.

[0046] Reference Figure 1 As shown, as some examples of this embodiment, the elastic connector 330 can be a rectangular spring. A rectangular spring refers to a spring with a rectangular cross section. The surface of the rectangular spring is flatter, and the contact area between the first support surface and the second support surface is larger, which can further improve the stability of the elastic connector 330.

[0047] Reference Figure 1 As shown, as some examples of this embodiment, the driving mechanism 200 may include a lifting motor, which may be disposed on a side of the first support member 310 away from the second support member 320 and connected to the first support member 310. The lifting motor can perform a lifting action and drive the first support member 310 to perform a lifting action.

[0048] The screen printing device in this embodiment can be used in the following manner: first, the substrate 400 can be placed on the substrate support surface on the second support member 320, and then the driving mechanism 200 is started to gradually raise the first support member 310, and the second support member 320 and the substrate 400 rise accordingly. When the substrate 400 begins to contact the printing screen 100 located above, the second support member 320 is also subjected to pressure, and the elastic connecting members 330 at different positions are deformed according to the pressure, so that the contact between the substrate 400 and the printing screen 100 is more uniform, thereby improving the stability of the amount of slurry printed on the substrate 400, and further improving the stability and yield of the device.

[0049] On the other hand, the present disclosure further provides a solar cell dispensing device, which includes a screen printing device as described in the above embodiment, wherein the substrate support surface is used to support the solar cell, and the opening pattern on the printing screen 100 corresponds to the area where the gate electrode on the solar cell is located.

[0050] Figure 3 This is a schematic diagram of the structure of a solar cell dispensing device. Figure 4 for Figure 3 A top view of the solar cell dispensing device. Figure 5 for Figure 4 Side view of the middle edge AA'. Figure 3~Figure 5 As shown, the solar cell dispensing device includes a printing screen 100, a driving mechanism 200 and a support adjustment mechanism 300. Among them, the support adjustment mechanism 300 includes a first support member 310, a second support member 320 and a plurality of retractable elastic connectors 330. The plurality of elastic connectors 330 are arranged between the first support member 310 and the second support member 320 at intervals, and the two ends of the elastic connector 330 are respectively connected to the first support member 310 and the second support member 320. The driving mechanism 200 is used to drive the first support member 310 to move toward the second support member 320, and the second support member 320 has a substrate support surface away from the first support member 310, and the printing screen 100 is arranged on the side of the substrate support surface away from the first support member 310. In addition, in this embodiment, the substrate 400 is a solar cell, the substrate support surface is used to carry the solar cell, and the opening pattern on the printing screen 100 corresponds to the area where the grid line electrode on the solar cell is located.

[0051] Reference Figure 3~Figure 5 As shown, in the solar cell dispensing device, the extension direction of the elastic connecting member 330 is along the vertical direction, and the transportation direction of the transportation mechanism can be along the horizontal direction. The transportation mechanism can be used to carry multiple solar cells at the same time, and it can transport each solar cell in turn to between the printing screen 100 and the supporting and adjusting mechanism 300 for screen printing.

[0052] The solar cell glue dispensing device can be used to print glue onto the grid electrode of the solar cell. The glue can be distributed on the grid electrode in a dotted form, or can also cover the grid electrode in a linear form, which can be determined by the opening pattern on the printing screen 100. The use of the solar cell glue dispensing device is similar to the screen printing device in the above embodiment, and will not be repeated here.

[0053] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A screen printing device, characterized in that: It comprises a printing screen (100), a driving mechanism (200) and a supporting and adjusting mechanism (300); The support adjustment mechanism (300) comprises a first support member (310), a second support member (320) and a plurality of retractable elastic connecting members (330), wherein the plurality of elastic connecting members (330) are arranged at intervals between the first support member (310) and the second support member (320), and two ends of the elastic connecting member (330) are respectively connected to the first support member (310) and the second support member (320); The driving mechanism (200) is used to drive the first support member (310) to move toward the second support member (320), the second support member (320) having a substrate support surface away from the first support member (310), and the printing screen (100) is arranged on a side of the substrate support surface away from the first support member (310).

2. The screen printing device according to claim 1, characterized in that: The support adjustment mechanism (300) further comprises a guide column (340), wherein the guide column (340) is fixedly connected to one of the first support member (310) and the second support member (320), and the guide column (340) is movably connected to the other of the first support member (310) and the second support member (320).

3. The screen printing device according to claim 2, characterized in that: The support adjustment mechanism (300) comprises a plurality of guide posts (340), the elastic connecting member (330) is a spring, and each of the elastic connecting members (330) is sleeved on at least one of the guide posts (340).

4. The screen printing device according to any one of claims 1 to 3, characterized in that: The second support member (320) comprises a connecting plate (321) and a plurality of support plates (322); a side surface of the connecting plate (321) is connected to the elastic connecting member (330); the support plate (322) is arranged on a side of the connecting plate (321) away from the elastic connecting member (330); and the plurality of support plates (322) are arranged in parallel and at intervals on the connecting plate (321).

5. The screen printing device according to claim 4, characterized in that: The end surfaces of the plurality of support plates (322) away from the connecting plate (321) form the printing material support surface, and a long strip-shaped clearance groove (3220) is provided on the end surface of at least one of the support plates (322).

6. The screen printing device according to claim 4, characterized in that: The screen printing device further comprises a conveying mechanism, wherein the conveying mechanism comprises a conveying belt (500), wherein the conveying belt (500) is arranged between two adjacent support plates (322), or the conveying belt (500) is arranged on a side of the outermost support plate (322) away from the other support plates (322).

7. The screen printing device according to any one of claims 1 to 3 and 5 to 6, characterized in that: The first support member (310) has a first connection surface, and the second support member (320) has a second connection surface, the first connection surface and the second connection surface are respectively connected to two ends of the elastic connection member (330), and the first connection surface and the second connection surface are both planar and arranged in parallel.

8. The screen printing device according to claim 7, characterized in that: There are at least four elastic connecting members (330), wherein the four elastic connecting members (330) are respectively arranged on four vertices of a rectangle on the first connecting surface.

9. The screen printing device according to claim 7, characterized in that: The elastic connecting member (330) is selected from a rectangular spring.

10. A solar cell dispensing device, characterized in that: Comprising the screen printing device according to any one of claims 1 to 9, the substrate support surface is used to support a solar cell, and the opening pattern on the printing screen (100) corresponds to the area where the grid line electrode on the solar cell is located.

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