CN115534503A - A screen printing device - Google Patents

Abstract

This application relates to the field of preparation of solar cells, in particular to a screen printing device, including a frame, a transmission belt arranged on the frame and driving the cells forward, a tensioned screen positioned directly above the transmission belt, The scraper is installed directly above the screen and is attached to the screen in an inclined state so that the screen is pressed down and attached to the battery sheet. There are two scrapers, and the two scrapers are connected to the same rotatable switching column. The frame is set There is a column moving device that can drive the switching column to move to adjust the position of the scraper. The frame is provided with two abutment plates. The switching column tends to be a rotation limiting device that rotates on one side of the high scraper, so that the electrode printing efficiency of the battery is improved.

Description

A screen printing device

technical field

The present application relates to the field of preparation of solar cells, in particular to a screen printing device.

Background technique

During the preparation process of solar cells, positive and negative electrodes need to be fabricated on the front and back surfaces of the battery, so that the current generated by light can be exported through the electrodes. Currently, screen printing is commonly used to fabricate electrodes on batteries.

In the existing screen printing, the screen is stretched first, and then the battery is conveyed to the bottom of the screen. There is a slight distance between the battery and the screen, and then the metal paste is placed on the screen, forming an inclined scraper and wire. The mesh is in line contact, and makes the part of the wire mesh directly under the scraper stick to the surface of the battery, and then the scraper moves, so that the metal paste is driven and passes through the mesh of the wire mesh, and the metal paste can pass through the mesh. Adhered to the surface of the battery, after the scraper passes through the corresponding mesh, the screen rebounds under the action of its own elasticity, leaving only the metal slurry on the surface of the battery to form an electrode.

In view of the above-mentioned related technologies, after the electrode printing of a battery sheet is completed, the scraper needs to return to the original path to reset, so that the scraper always drives the ink to move with a predetermined inclined posture, which will make a battery complete printing and The longer idle time between two time points before the next cell starts printing reduces the overall efficiency of electrode printing on the cell surface.

Contents of the invention

In order to improve the overall efficiency of battery surface electrode printing, the present application provides a screen printing device.

A screen printing device provided by this application adopts the following technical solutions.

A screen printing device, comprising a frame, a transmission belt arranged on the frame and driving the cells to move forward, a tensioned screen installed directly above the transmission belt, and attached in an inclined state directly above the screen There are two scrapers on the screen so that the screen is pressed down and attached to the battery sheet. The two scrapers are connected to the same rotatable switching column. Column moving device, the frame is provided with two abutment plates, the switch column is provided with a driving block located between the two abutment plates and can abut against the abutment plates, and the switch column is provided with a scraper that makes the switch column tend to rotate on one side with a higher height limiter device.

By adopting the above technical scheme, after the scraper completes the electrode printing of a battery sheet, the driving block will abut against a backing plate, so that the switching column rotates. The scraper is in contact with the screen, so that when the switching column is reset and moved back, the scraper that is newly in contact with the screen can print the electrode of the next battery, so that each time the switching column moves, there can be a corresponding scraper to print. The electrode printing of a battery can better improve the overall efficiency of printing electrodes for a large number of batteries, and can also fully use the metal paste.

Optionally, the column moving device includes a translation lead screw that is rotatably connected to the frame, a lead screw motor that is arranged on the frame and drives the translation lead screw to rotate, a lead screw block that is threadedly connected to the translation lead screw, and is provided on the frame. And the horizontal guide rod for the screw block to slide along the length direction of the side of the battery, the vertical movement cylinder arranged on the lead screw block, the vertical guide rod arranged on the lead screw block, the power rod connected to the vertical movement cylinder and slidably connected to the vertical guide The cylinder block of the rod, the moving direction of the cylinder block is perpendicular to the moving direction of the lead screw block, and the switching column is connected to the cylinder block in rotation.

By adopting the above technical scheme, the lead screw motor is connected to the external power supply, so that the translation lead screw rotates, and the lead screw block moves to drive the scraper to move when the electrode is printed on the screen, and the vertical movement of the cylinder drives the movement of the cylinder block. So that the scraper can be properly kept away from the screen, so that the printed battery can be removed and the battery to be printed can be moved directly under the screen.

Optionally, the rotation limiting device includes a tension spring detachably connected to the driving block and the cylinder block, two rotation limiting blocks connected to the outer wall of the switching column circumference, and a spring that is arranged on the cylinder block and can be abutted by the rotation limiting block. For the two fixed blocks, the distance between the end of the tension spring connected to the cylinder block and the axis of the switching column can be smaller than the distance between the end of the tension spring connected to the cylinder block and the driving block.

By adopting the above-mentioned technical scheme, when the driving block abuts against the abutting plate, the abutting plate cannot be easily moved, so that the driving block moves, the switching column rotates, and the tension spring is forced to elongate, the switching column rotation point, the driving block And the state where the three points of the tension spring connected to one end of the frame are on the same straight line is the intermediate state. When the driving block passes through the intermediate state, the tension spring drives the switching column to rotate, so that the states of the two scrapers are interchanged, depending on The setting of the block makes it difficult for the tension spring to drive the switching column to rotate excessively, so that the scraper is not easy to cause excessive pressure on the screen.

Optionally, the fixed block is slidably connected to the cylinder block around the rotation axis of the switching column, and the fixed block is threadedly connected with a positioning bolt for fixing the position of the fixed block.

By adopting the above technical solution, the pressure caused by the scraper on the screen can be adjusted to a certain extent, so that when the screen is replaced or the distance between the screen and the battery is changed, the downward pressure of the scraper needs to be adjusted synchronously. It is convenient to adjust the pressing pressure of the scraper accordingly.

Optionally, the positioning bolt is set through the fixed block, and one end of the positioning bolt passing through the setting block is rotatably connected to a bolt rack, and an inner block rack for meshing with the bolt rack is provided inside the cylinder block.

By adopting the above technical scheme, after the position of the fixed block is adjusted, turn the positioning bolt so that the bolt rack can engage with the rack in the block, making it difficult for the fixed block to move at will, so that the driven block can also be driven by the tension spring. It will not force the fixed block to move easily, so that the pressure of the scraper on the screen is not easy to change randomly.

Optionally, two switching columns are provided, and a connecting rod is coaxially fixedly connected between the two switching columns, and each switching column corresponds to a set of two abutment plates.

By adopting the above technical scheme, the scraper is more stable during the process of pressing the scraper against the screen for electrode printing, and the setting of the connecting rod enables the two switching columns to rotate synchronously, so that the scraper is not easily affected by the two factors. Large deformation external force caused by asynchronous rotation of two switching columns.

Optionally, each of the scrapers includes a mounting plate fixedly connected to the switching column, and a detachment piece detachably connected to the mounting plate and abutted against the wire mesh.

By adopting the above technical solution, only the dismounting piece needs to be replaced when the dismounting piece is greatly worn, and it also helps to further reduce the torsional deformation external force on the dismounting piece.

Optionally, a connecting piece is provided at the adjacent ends of the two disassembly pieces, and the disassembly piece is plugged into the installation plate along its own length direction.

By adopting the above technical solution, the two dismounting pieces can be replaced or installed synchronously, and a part of the external force can be shared between the two dismounting pieces.

Optionally, the two abutment plates are slidably connected to the frame, and the frame is rotatably connected with an abutment screw that drives the two abutment plates to approach or move away from each other, and the frame is provided with a screw motor that drives the abutment screw to rotate.

By adopting the above technical solution, after the length of the battery to be printed changes, the distance between the two abutting plates can also be adjusted accordingly, so as to better adapt to batteries of different specifications within a certain range.

Optionally, the thread directions on both sides of the center point of the abutment screw are opposite, and the two abutment plates are located at equal distances on both sides of the center point of the abutment screw.

By adopting the above-mentioned technical scheme, a screw rod of the abutment plate can drive the two abutment plates to move synchronously, so that the movement of the two abutment plates is relatively synchronous, so that the center point between the two abutment plates is not easy to change in position and can be kept relatively stable. It is well aligned with the center line of the battery, so that when the driving block abuts against the two abutment plates, it can better ensure the state of completing electrode printing for a battery.

In summary, the present application includes at least one of the following beneficial effects:

1. Make it possible to have a corresponding scraper to print the electrodes of a battery every time the switching column moves, which can better improve the overall efficiency of printing electrodes for a large number of batteries;

2. When the screen is replaced or the distance between the screen and the battery is changed, the downward pressure of the scraper needs to be adjusted synchronously, and it is convenient to adjust the downward pressure of the scraper accordingly.

Description of drawings

Fig. 1 is a schematic diagram of the main structure of the application;

Fig. 2 is a structural schematic diagram at one end of the cylinder block in the length direction;

Fig. 3 is an enlarged view of A in Fig. 2 .

Explanation of reference signs: 1, frame; 2, transmission belt; 3, silk screen; 31, rack in block; 32, connecting rod; 33, installation plate; 34, disassembly piece; 35, connecting piece; 36, frame plate ; 37, end face rod; 38, slotted rod; 4, scraper; 41, cylinder block; 42, tension spring; 43, fixed block; 44, limit rotation block; 45, plate screw rod; 46, lead screw motor; 47. Screw motor; 48. Positioning bolt; 49. Bolt rack; 5. Switch column; 51. Column moving device; 52. Reaching plate; 53. Driving block; , lead screw block; 57, horizontal guide rod; 58, vertically move cylinder; 59, vertical guide rod.

detailed description

The application will be described in further detail below in conjunction with the accompanying drawings.

The embodiment of the present application discloses a screen printing equipment. Referring to FIG. 1, it includes a frame 1 placed on the ground. The frame 1 is equipped with a horizontal transmission belt 2. The frame 1 is provided with corresponding steel rollers and motors so that the transmission belt 2 Carry out transmission, and each piece of solar cells is all placed on the transmission belt 2 and sends. The upper surface of both sides of the frame 1 is integrally formed with a vertical frame plate 36, and the bottom of the two frame plates 36 are connected with a horizontal wire mesh 3 detachably by bolts, and the wire mesh 3 can be woven by metal wires. The formed screen screen has a fine distance between the lower surface of the screen 3 and the upper surface of the battery, and a scraper 4 that is tightly pressed against the screen 3 is installed directly above the screen 3 so that the screen 3 can be in line contact with the battery , The length direction of the scraper 4 is consistent with the length direction of the transmission belt 2. The scraper 4 moves along the width direction of the transmission belt 2, so that the metal slurry on the screen 3 can be driven by the scraper 4 to move and print several electrodes on the upper surface of the battery through the gap on the screen 3, and the electrode length direction and the scraper 4 same length direction.

With reference to Fig. 1 and Fig. 2, scraper 4 is equipped with a switching column 5, and frame plate 36 is equipped with the column moving device 51 that can drive switch column 5 to move to adjust the position of scraper 4, and column moving device 51 comprises that is rotatably connected to frame plate 36 tops. The translation lead screw 55, the length direction of the translation lead screw 55 is consistent with the width direction of the transmission belt 2, the outer surface of the frame plate 36 is fixedly connected with a lead screw motor 46, and the output shaft of the lead screw motor 46 is coaxially fixedly connected to the translation lead screw 55, and the translation The leading screw 55 is threaded and connected with a leading screw block 56, the top of the shelf plate 36 is fixedly connected with a horizontal guide rod 57, the length direction of the horizontal guide rod 57 is consistent with the length direction of the translation leading screw 55, and the leading screw block 56 moves along the direction of the translation leading screw. 55 length direction is sleeved and is slidably connected to the horizontal guide bar 57, and the lower surface of the screw block 56 is fixedly connected with a vertically moving cylinder 58 whose power rod is vertical, and the bottom end of the vertically moving cylinder 58 power rod is fixedly connected with a cylinder block 41, and the cylinder The length direction of the block 41 is consistent with the length direction of the scraper 4. The lower surface of the screw block 56 is fixedly connected with a vertical guide rod 59. The cylinder block 41 is sleeved in the vertical direction and is slidably connected to the vertical guide rod 59. The cylinder block 41 enables the switching column 5 and the scraper 4 to perform synchronous translation and vertical movement.

With reference to Fig. 2, a switching column 5 is arranged at both ends of the cylinder block 41 in the length direction, the rotation axis of the switching column 5 is consistent with the length direction of the cylinder block 41, the rotation axis of the switching column 5 is its own axis, and the two switching columns 5 are coaxially fixed The same connecting rod 32 is connected, and the connecting rod 32 is rotatably connected to the inside of the cylinder block 41 . The switching column 5 is provided with two scrapers 4 around its own axis, and each scraper 4 includes a mounting plate 33 fixedly connected to the outer walls of the two switching columns 5. The length direction of the mounting plate 33 is consistent with the axial direction of the switching column 5. The mounting plate 33 The straight line in the width direction passes through the center of the switching column 5, and one end of the mounting plate 33 in the length direction is tightly sleeved with a disassembly piece 34 along its own length direction, and the end of the disassembly piece 34 exposed to the installation plate 33 is detachably connected to the length direction of the installation plate 33 by screws On one end face, the bottom of the dismounting piece 34 is in contact with the screen 3, and the state of each dismounting piece 34 is inclined when it contacts the wire mesh, and when each dismounting piece 34 moves horizontally and radially along the switching column 5, the The high point end is located at the low point end of the dismounting piece 34 in accordance with its own moving direction, so that the inclined bottom surface of the dismounting piece 34 can fully push the metal slurry forward. One end of the two dismounting pieces 34 exposed to the mounting plate 33 is fixedly connected to the same connecting rod 32 so as to install or disassemble the two dismounting pieces 34 synchronously.

Referring to Fig. 2, each switching column 5 is equipped with a rotation limiting device 54 that makes the switching column 5 tend to rotate on one side of the high scraper 4, and the limiting rotation device 54 includes a driving block fixedly connected to the bottom periphery of the switching column 5 end faces 53, the distance between the driving block 53 and the two mounting plates 33 is consistent, and the upper end face of one end of the cylinder block 41 in the length direction is integrally formed with an end face rod 37, and the end face rod 37 and the axis of the switching column 5 are located in the same vertical plane, and the end face A tension spring 42 is detachably connected between the rod 37 and the driving block 53, and the crotch hooks at the two ends of the tension spring 42 are hooked to the end face rod 37 and the driving block 53 respectively. The sheet 34 is evenly distributed on the screen, and the driving block 53, the center of the end face of the switching column 5 and the end face bar 37 are on the same vertical line, that is, the driving block 53 is in the middle state at this time. When the driving block 53 is not in the middle state , the tension spring 42 drives the switching column 5 to rotate so that the scraper 4 at a high position tends to move upward.

2 and 3, the rotation limiting device 54 also includes two fixed blocks 43 that are slidably connected to the cylinder block 41 around the axis of the switching column 5. An opening is provided corresponding to each fixed block 43 for the fixed block 43 to slide out and slide into the cylinder block 41 . The center point of the end surface of the switching column 5 is consistent with the distance between the two fixed blocks 43, and each fixed block 43 is screwed with a positioning bolt 48, and the positioning bolt 48 moves along the axis direction of the switching column 5, and the cylinder block 41 corresponds to each fixed block. The inside of the block 43 is fixedly connected with a block internal rack 31, the block internal rack 31 is arc-shaped and the center of circle is the center of the end face of the switching column 5, the fixed block 43 is slidably connected to the block internal rack 31 circumferential side, each positioning The bolt 48 is located in the fixed block 43 and one end is connected with a bolt rack 49 for rotation. The bolt rack 49 is slidably connected to the fixed block 43 along the moving direction of the positioning bolt 48. The bolt rack 49 can be engaged with the internal rack 31 of the block, so that the fixed block 43 The position is fixed and no longer moves.

Referring to Fig. 2 and Fig. 3, the limited rotation device 54 also includes two limited rotation blocks 44 fixedly connected to the outer wall of the switching column 5, the two limited rotation blocks 44 are located between the two fixed blocks 43, and the two limited rotation blocks 44 It can abut against the two fixed blocks 43 one by one, and the distance between the two rotation limiting blocks 44 and the driving block 53 is consistent, so that the tension spring 42 drives the switching column 5 to rotate and makes a scraper 4 move to a suitable position At this time, a rotation limiting block 44 will abut against a corresponding fixed block 43, so that the switching column 5 will not rotate any more, so that the pressure exerted by the dismounting piece 34 on the screen will not be too large.

Referring to Fig. 1, the frame plate 36 is integrally formed with two slotted rods 38, each slotted rod 38 is rotatably connected with an abutment screw rod 45, the length direction of the abutment screw rod 45 is consistent with the width direction of the transmission belt 2, and the abutment plate The thread directions on both sides of the center point of the screw rod 45 are opposite, and the end of the slotted rod 38 is fixedly connected with the screw motor 47 whose output shaft is coaxially fixedly connected to the screw rod 45 of the bottom plate, and each slotted rod 38 is slidably connected with a group of two Arresting plate 52, the abutting plate 52 moves along the length direction of the abutting plate screw rod 45, the spacing between the center points of the two abutting plate 52 and the abutting plate screw rod 45 in the same group is equal, and the abutting plate 52 is sleeved and threadedly connected to the abutting plate screw rod 45, so that The two resisting plates 52 in the same group move synchronously so as to adjust the distance between the two resisting plates 52 in the same group.

After the electrode printing of a battery is completed, the driving block 53 will be in contact with an abutment plate 52, so that the switching column 5 is forced to rotate, so that the dismounting piece 34 that was originally in contact with the screen 3 rotates and moves up. When the driving block 53 just passes through the middle state, the switching column 5 stops moving forward, and now the tension spring 42 makes the switching column 5 continue to rotate, so that the dismounting sheet 34 that was originally far away from the screen 3 contacts the screen, so that when the switching column 5 resets and moves, the new contact on the The dismounting piece 34 of the screen 3 can drive the metal paste to move, so that the electrode printing work of a new battery starts.

The implementation principle of a screen printing device in the embodiment of the present application is as follows: every time the switching column 5 moves along the width direction of the transmission belt 2, there is a corresponding one of the two scrapers 4 that can be pressed against the screen 3 to print the electrodes, This makes it possible to print electrodes on the surface of a battery each time the switching column 5 moves.

All of the above are preferred embodiments of the application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made according to the structure, shape, and principle of the application should be covered by the protection scope of the application. Inside.

Claims (10)

1. The utility model provides a screen printing equipment, includes frame (1), locate frame (1) and drive belt (2) of battery piece antedisplacement, locate directly over drive belt (2) and by silk screen (3) of tensioning, locate directly over silk screen (3) and be the state laminating of slope in silk screen (3) so that silk screen (3) push down scraper (4) of laminating in the battery piece, its characterized in that: scraper (4) set up two, and two scrapers (4) are connected with same pivoted switching post (5), and frame (1) is equipped with and drives the post mobile device (51) that switches post (5) and remove in order to adjust scraper (4) position, and frame (1) is equipped with two and supports board (52), switches post (5) and is equipped with and is located between two support board (52) and can butt in driving piece (53) of supporting board (52), switches post (5) and is equipped with and makes switching post (5) tend to high scraper (4) one side pivoted rotation limiting device (54).

2. A screen printing apparatus according to claim 1, wherein: post mobile device (51) is including rotating the translation lead screw (55) of connecting in frame (1), locate frame (1) and drive translation lead screw (55) pivoted lead screw motor (46), threaded connection is in lead screw piece (56) of translation lead screw (55), locate frame (1) and supply lead screw piece (56) along the gliding horizontal guide bar (57) of battery side length direction, the perpendicular cylinder (58) that move of locating lead screw piece (56), locate perpendicular guide bar (59) of lead screw piece (56), connect in perpendicular cylinder (58) power bar that moves and sliding connection in cylinder block (41) of perpendicular guide bar (59), cylinder block (41) moving direction perpendicular to lead screw piece (56) moving direction, switching post (5) rotate to be connected in cylinder block (41).

3. A screen printing apparatus according to claim 2, wherein: the rotation limiting device (54) comprises an extension spring (42) detachably connected to a driving block (53) and a cylinder block (41), two rotation limiting blocks (44) connected to the circumferential outer wall of a switching column (5), and two fixed blocks (43) arranged on the cylinder block (41) and capable of being abutted by the rotation limiting blocks (44), wherein the distance between one end of the extension spring (42) connected with the cylinder block (41) and the axis of the switching column (5) can be smaller than the distance between one end of the extension spring (42) connected with the cylinder block (41) and the driving block (53).

4. A screen printing apparatus according to claim 3, wherein: the fixed block (43) is connected to the cylinder block (41) in a sliding mode around the rotating axis of the switching column (5), and the fixed block (43) is connected with a positioning bolt (48) in a threaded mode, wherein the positioning bolt fixes the position of the fixed block (43).

5. A screen printing apparatus according to claim 4, wherein: the positioning bolt (48) penetrates through the fixing block (43), one end, penetrating through the fixing block (43), of the positioning bolt (48) is rotatably connected with a bolt rack (49), and an inner rack (31) for the bolt rack (49) to be meshed is arranged inside the air cylinder block (41).

6. A screen printing apparatus according to claim 1, wherein: the switching columns (5) are arranged in two, the two switching columns (5) are coaxially and fixedly connected with connecting rods (32), and each switching column (5) corresponds to one set of two abutting plates (52).

7. A screen printing apparatus according to claim 1, wherein: each scraper (4) comprises a mounting plate (33) fixedly connected to the switching column (5) and a dismounting sheet (34) detachably connected to the mounting plate (33) and abutted to the silk screen (3).

8. A screen printing apparatus according to claim 7, wherein: and one end of each of the two disassembling pieces (34) close to each other is provided with a connecting piece (35), and the disassembling pieces (34) are inserted into the mounting plate (33) along the length direction of the disassembling pieces.

9. A screen printing apparatus according to claim 1, wherein: two support plate (52) sliding connection is in frame (1), and frame (1) rotates to be connected with and drives two support plate (52) and be close to mutually or keep away from support plate screw rod (45), and frame (1) is equipped with and drives support plate screw rod (45) pivoted screw rod motor (47).

10. A screen printing apparatus according to claim 9, wherein: the thread directions of the two sides of the center point of the abutting plate screw rod (45) are opposite, and the two abutting plates (52) are positioned at the equal distance of the two sides of the center point of the abutting plate screw rod (45).

Images