Silk-screen printing device for photovoltaic silicon wafers

Abstract

The invention discloses a photovoltaic silicon wafer silk-screen printing device, and relates to the field of silicon wafer processing, the photovoltaic silicon wafer silk-screen printing device comprises a frame, the top wall of one side of the frame is fixedly connected with a printing machine main body, the four corners of the bottom of the frame are fixedly connected with supporting legs, the bottoms of the supporting legs are fixedly connected with universal wheels, and the outer side wall of the frame is fixedly connected with a motor. A rotary disc is twisted to drive a screw to rotate, then a connecting plate movably installed between two discs is driven by a linkage rod to move, the end, away from the discs, of the connecting plate abuts against a moving block, so that the moving block achieves linear movement, and at the moment, movement of a tooth block drives a first gear and a second gear which are connected with the tooth block in a meshed mode to rotate; the rotating rod inserted into the inner ring of the second gear rotates to drive the baffles to rotate, the two baffles move in the opposite direction or away from each other so that the distance between the ends of the two baffles can be adjusted, in this way, silicon wafers of different sizes can conveniently penetrate through the position between the two baffles to complete automatic deviation correction, and it is guaranteed that the follow-up printing effect is better.

Description

Technical Field

[0001] The invention relates to the field of silicon wafer processing, and in particular to a photovoltaic silicon wafer screen printing device. Background Art

[0002] In the semiconductor industry chain, silicon wafers, as an important core material for chip manufacturing, play a key role in chip manufacturing. Screen printing technology is a widely used printing method that uses a mesh screen to print various patterns and texts. In silicon wafer screen printing, this technology is used to make circuits or electrodes on the surface of silicon wafers. The specific process includes using a scraper to apply slurry on the screen, and then pressing the slurry on the silicon wafer by controlling variables such as pressure and temperature. This method can achieve high-efficiency and precise printing, and is suitable for making fine circuits and electrodes.

[0003] The existing Chinese patent authorization announcement number: CN111114106A discloses a screen printing device for silicon wafer processing. In view of the problem that the overall screen printing process of the screen printing device for silicon wafer processing is slow and inefficient during the screen printing process, the following scheme is proposed, including a fixed base, a mounting groove is opened in the middle of the fixed base, and both ends between the inner walls on both sides of the fixed base are sleeved with a horizontally arranged rotating central axis through a bearing, and the same horizontally arranged transmission belt is sleeved between the circumferential outer walls of the two rotating central axes. In this invention, a rotating central axis is sleeved between the two sides of the fixed base through a bearing, and a conveyor belt is sleeved between the rotating central axes. When the operator is in use, he directly places the silicon wafer on the top of the transmission belt, and the silicon wafer can be moved. The bottom silicon wafer can be screen printed by rolling the top screen printing roller. Compared with the traditional fixed silicon wafer type screen printing, the assembly line screen printing is faster and more efficient.

[0004] The above photovoltaic silicon wafer screen printing device still has the following problems when in use: the above silicon wafer needs to be manually adjusted in terms of position and angle during the transmission process to ensure the accuracy of subsequent printing, which increases the overall workload and directly increases the printing cost.

[0005] Therefore, it is necessary to invent a photovoltaic silicon wafer screen printing device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a photovoltaic silicon wafer screen printing device to solve the problem proposed in the above background technology that the position and angle of the silicon wafers need to be manually adjusted during the transmission process to ensure the accuracy of subsequent printing, which increases the overall workload and directly leads to increased printing costs.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a photovoltaic silicon wafer screen printing device, comprising a frame, a top wall of one side of the frame is fixedly connected to a printer body, four corners of the bottom of the frame are fixedly connected to legs, and the bottom of the legs is fixedly connected to a universal wheel, the outer side wall of the frame is fixedly connected to a motor, and the output shaft of the motor is transmission-connected to a drive shaft, and the drive shaft is arranged in parallel with the transmission shaft, and the drive shaft and the transmission shaft are transmission-connected through a conveyor belt, and the outer wall of the conveyor belt is provided with a ball block, and a cavity is provided inside the frame, and the inner wall of the cavity is rotationally connected to a rotating rod through a bearing, and the outer wall of the rotating rod is covered with a baffle, and the spacing between the ends of the two baffles is adjusted, so that silicon wafers of different sizes can pass through the two baffles to complete self-correction, thereby ensuring a better subsequent printing effect, and also includes:

[0008] The knob assembly, the frame is internally threadedly connected with a screw rod, the top of the screw rod is fixedly connected with a rotating disk, and the screw rod is internally movably plugged with a linkage rod, the lower end of the linkage rod is fixedly connected with a disc, and the disc is fixedly connected with a short rod 1, the cavity is internally slidably connected with a moving block, and a notch is provided inside the moving block, and a short rod 2 is fixedly connected to the inner wall of the notch, and a transmission connection is realized between the short rod 2 and the short rod 1 through a connecting plate;

[0009] Transmission assembly, the side wall of the moving block is fixedly connected with a tooth block, and the tooth block is meshed with gear 1, the gear shaft inserted inside the gear 1 is rotatably connected with the cavity, and the gear 1 is meshed with gear 2, and the gear 2 is sleeved on the outer ring of the rotating rod;

[0010] The support assembly includes a support block fixedly connected to the inner wall of the cavity, and the support block matches a square groove arranged inside the moving block to ensure the stability of the moving block.

[0011] Preferably, there are several ball blocks, and the ball blocks are evenly spaced and distributed in a straight line. The ball blocks abut the silicon wafer so that when the silicon wafer performs autonomous deviation correction, the end position of the silicon wafer and the ball blocks abutting against each other can be limited, which also facilitates the control of the distance between adjacent silicon wafers.

[0012] Preferably, there are two baffles, which are symmetrically arranged, and the lower end of the baffle is in contact with the top wall of the conveyor belt and is slidably connected, so that the silicon wafer to be printed can achieve self-correction after passing between the ends of the two baffles.

[0013] Preferably, a protrusion is fixedly connected to the side wall of the upper end of the linkage rod, and the outer walls of the linkage rod and the protrusion are in contact with the inner walls of the columnar grooves arranged inside the screw rod to achieve a sliding connection, so that when the screw rod rotates, it drives the linkage rod movably connected to it to rotate, and then drives the disk fixedly connected to the end of the linkage rod to rotate.

[0014] Preferably, the discs are provided in two pieces which are symmetrically distributed up and down, a gap is left between the two discs, and the disc at the lower position matches the circular groove preset inside the cavity to ensure the stability of the disc rotation.

[0015] Preferably, the two ends of the connecting plate are rotatably connected to the outer walls of short rod one and short rod two through bearings, so that when the rotation of the disc drives one end of the connecting plate to move, the other end of the connecting plate can synchronously promote the movement of the moving block movably connected thereto.

[0016] Preferably, the top and bottom of the support block are fixedly connected with side blocks, and the side walls of the side blocks and the two body blocks of the support block are in contact with the inner wall of the square groove and are slidably connected to ensure the stability of the moving block during movement.

[0017] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0018] 1. The present invention drives the screw to rotate by twisting the turntable, and then drives the connection plate movably installed between the two sets of discs to move through the linkage rod. The end of the connection plate away from the disc presses against the moving block to enable the moving block to move linearly. At this time, the movement of the tooth block drives the gear 1 and gear 2 meshing with it to rotate. The rotation of the rotating rod plugged into the inner ring of the gear 2 drives the baffle to rotate. The two baffles move toward or away from each other, so that the spacing between the ends of the two baffles can be adjusted. This makes it convenient for silicon wafers of different sizes to pass through the two baffles to complete self-correction, ensuring better subsequent printing effects.

[0019] 2. When the rotating disk drives the screw to rotate, the screw and the frame are threadedly connected. The threaded connection is self-locking, so that the distance between the two baffles can be adjusted independently. At the same time, the movable connection between the screw and the linkage rod ensures that the screw has sufficient displacement space during the rotation process, ensuring the smooth rotation of the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a three-dimensional diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic top view of the overall structure of the present invention;

[0023] Figure 3 It is a three-dimensional diagram of the internal structure of the frame of the present invention (partially cut in transverse direction);

[0024] Figure 4 It is a three-dimensional diagram of the internal structure of the frame (vertical partial cutaway state) of the present invention;

[0025] Figure 5 It is a three-dimensional diagram of the connection structure of the knob assembly and the transmission assembly of the present invention;

[0026] Figure 6 It is an exploded view of the internal structure of the screw (partially cut away) of the present invention;

[0027] Figure 7 It is an exploded view of the connection structure between the support assembly and the moving block of the present invention.

[0028] Description of reference numerals:

[0029] 1. Frame; 2. Leg; 3. Universal wheel; 4. Printing machine body; 5. Motor; 6. Drive shaft; 7. Transmission shaft; 8. Conveyor belt; 9. Ball block; 10. Cavity; 11. Rotating rod; 12. Baffle; 13. Knob assembly; 1301. Turntable; 1302. Screw rod; 1303. Linkage rod; 1304. Bump; 1305. Columnar groove; 1306. Disc; 1307. Short rod one; 1308. Moving block; 1309. Notch; 1310. Short rod two; 1311. Connecting plate; 14. Transmission assembly; 1401. Tooth block; 1402. Gear one; 1403. Gear shaft; 1404. Gear two; 15. Support assembly; 1501. Support block; 1502. Side block; 1503. Square groove. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] The present invention provides Figure 1-7A photovoltaic silicon wafer screen printing device shown includes a frame 1, a top wall of one side of the frame 1 is fixedly connected to a printer body 4, four corners of the bottom of the frame 1 are fixedly connected to legs 2, and the bottom of the legs 2 is fixedly connected to a universal wheel 3, the outer wall of the frame 1 is fixedly connected to a motor 5, and the output shaft of the motor 5 is transmission-connected to a drive shaft 6, and the drive shaft 6 is arranged in parallel with the transmission shaft 7, and the drive shaft 6 and the transmission shaft 7 are transmission-connected through a conveyor belt 8, and the outer wall of the conveyor belt 8 is provided with a ball block 9, a cavity 10 is provided inside the frame 1, and the inner wall of the cavity 10 is rotationally connected to a rotating rod 11 through a bearing, and the outer wall of the rotating rod 11 is sleeved with a baffle 12, and the spacing between the ends of the two baffles 12 is adjusted, so that silicon wafers of different sizes can pass through the two baffles 12 to complete self-correction, thereby ensuring a better subsequent printing effect, and also includes:

[0032] The knob assembly 13, the internal thread connection of the frame 1 is connected with a screw rod 1302, and the top of the screw rod 1302 is fixedly connected with a rotating disk 1301, and the internal movably plugged with a linkage rod 1303, the lower end of the linkage rod 1303 is fixedly connected with a disk 1306, and the disk 1306 is fixedly connected with a short rod 1 1307, the interior of the cavity 10 is slidably connected with a moving block 1308, and a notch 1309 is opened inside the moving block 1308, and the inner wall of the notch 1309 is fixedly connected with a short rod 2 1310, and the short rod 2 1310 and the short rod 1 1307 are connected to each other through a connecting plate 1311 to achieve transmission connection;

[0033] Transmission assembly 14, the side wall of the moving block 1308 is fixedly connected with a tooth block 1401, and the tooth block 1401 is meshed and connected with gear 1 1402, the gear shaft 1403 inserted inside the gear 1 1402 is rotatably connected with the cavity 10, and the gear 1 1402 is meshed and connected with gear 2 1404, and gear 2 1404 is sleeved on the outer ring of the rotating rod 11. After the gears are meshed and connected, the rotation directions of the two sets of gears are opposite. At this time, the rotating rods 11 inserted into the inner rings of the two sets of gears 2 1404 realize different directions of rotation. The rotation of the rotating rod 11 synchronously drives the rotation of the baffle 12, and the two baffles 12 can move towards each other or move away from each other at this time;

[0034] The inner wall of the cavity 10 of the support assembly 15 is fixedly connected with a support block 1501 , and the support block 1501 matches the square groove 1503 provided inside the moving block 1308 to ensure the stability of the movement of the moving block 1308 .

[0035] There are several ball blocks 9, and the ball blocks 9 are evenly spaced and distributed in a straight line. The ball blocks 9 abut the silicon wafer so that when the silicon wafer performs autonomous deviation correction, the end position of the silicon wafer abutting against the ball blocks 9 can be limited, which also facilitates the control of the distance between adjacent silicon wafers.

[0036] There are two baffles 12, and the two baffles 12 are symmetrically arranged, and the lower end of the baffle 12 contacts and slides with the top wall of the conveyor belt 8, so that the silicon wafer to be printed can achieve self-correction after passing between the ends of the two baffles 12.

[0037] The side wall of the upper end of the linkage rod 1303 is fixedly connected with a protrusion 1304, and the outer walls of the linkage rod 1303 and the protrusion 1304 are in contact with the inner wall of the columnar groove 1305 set inside the screw 1302 to achieve a sliding connection, so that when the screw 1302 rotates, it drives the linkage rod 1303 movably connected to it to rotate, and then drives the disk 1306 fixedly connected to the end of the linkage rod 1303 to rotate.

[0038] There are two discs 1306 symmetrically distributed up and down, with a gap between the two discs 1306 , and the lower disc 1306 matches the circular groove preset inside the cavity 10 to ensure the stability of the rotation of the disc 1306 .

[0039] The two ends of the connecting plate 1311 are rotationally connected to the outer walls of short rod 1307 and short rod 2 1310 through bearings, so that when the disc 1306 rotates to drive one end of the connecting plate 1311 to move, the other end of the connecting plate 1311 can synchronously promote the movement of the moving block 1308 movably connected thereto.

[0040] The top and bottom of the support block 1501 are fixedly connected to the side block 1502, and the side walls of the side block 1502 and the support block 1501 are in contact with the inner wall of the square groove 1503 and are slidably connected to ensure the stability of the moving block 1308 during movement.

[0041] Working principle: When using a photovoltaic silicon wafer screen printing device, firstly, the screw 1302 fixedly connected to the lower end of the turntable 1301 is driven to rotate by twisting the turntable 1301. At the same time, when the turntable 1301 is twisted to drive the screw 1302 to rotate, the screw 1302 is threadedly connected to the frame 1, and the threaded connection is self-locking, so that the spacing between the two baffles 12 can be adjusted and limited independently. At the same time, the active connection between the screw 1302 and the linkage rod 1303 ensures that the screw 1302 has a self-locking function during the rotation process. Sufficient displacement space ensures the smooth rotation of the screw 1302. The internal movable sleeve of the screw 1302 is fixedly connected with the linkage rod 1303 with the protrusion 1304. Therefore, the linkage rod 1303 synchronizes the rotation of the screw 1302, and then drives the two sets of discs 1306 to rotate through the linkage rod 1303. The connecting plate 1311 movably installed between the discs 1306 through the short rod 1307 moves accordingly. The end of the connecting plate 1311 away from the disc 1306 presses against the moving block 1304 during the movement of the connecting plate 1311. 308 enables the moving block 1308 to realize linear movement. At this time, the tooth blocks 1401 fixedly connected to the two side walls of the moving block 1308 move synchronously to drive the gear 1 1402 and the gear 2 1404 meshing with the tooth blocks 1401 to rotate. Since the gears are meshed and connected, the rotation directions of the two sets of gears are opposite. At this time, the rotating rods 11 inserted into the inner rings of the two sets of gears 1404 realize different directions of rotation. The rotation of the rotating rod 11 synchronously drives the rotation of the baffle 12. At this time, the two baffles 12 can move towards each other or away from each other. Movement, so that the distance between the ends of the two baffles 12 can be adjusted, so that it is convenient for silicon wafers of different sizes to pass through the two baffles 12 to complete self-correction, ensuring better subsequent printing effects. At the same time, a number of ball blocks 9 are evenly spaced and distributed in a straight line, so that when the silicon wafer to be printed passes through two preset baffles 12, the ball block 9 on the conveyor belt 8 can abut the silicon wafer, and the end position of the silicon wafer and the ball block 9 abutting can be limited, so that the silicon wafer can perform self-correction operations while also facilitating the control of the distance between adjacent silicon wafers.

[0042] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A photovoltaic silicon wafer screen printing device, comprising a frame (1), characterized in that: A printing machine body (4) is fixedly connected to a top wall of one side of the frame (1); legs (2) are fixedly connected to the four corners of the bottom of the frame (1); and the bottom of the legs (2) is fixedly connected to a universal wheel (3); an outer side wall of the frame (1) is fixedly connected to a motor (5); and the output shaft of the motor (5) is transmission-connected to a drive shaft (6); and the drive shaft (6) and the transmission shaft (7) are arranged in parallel; the drive shaft (6) and the transmission shaft (7) are transmission-connected via a conveyor belt (8); a ball block (9) is arranged on the outer wall of the conveyor belt (8); a cavity (10) is arranged inside the frame (1); and the inner wall of the cavity (10) is rotationally connected to a rotating rod (11) via a bearing; and a baffle (12) is sleeved on the outer wall of the rotating rod (11); and the frame (1) further comprises: A knob assembly (13), wherein the frame (1) is internally threadedly connected with a screw rod (1302), and the top of the screw rod (1302) is fixedly connected with a rotating disk (1301), and a linkage rod (1303) is movably inserted inside the screw rod (1302), and the lower end of the linkage rod (1303) is fixedly connected with a disk (1306), and the disk (1306) is fixedly connected with a short rod 1 (1307), and the interior of the cavity (10) is slidably connected with a moving block (1308), and a notch (1309) is provided inside the moving block (1308), and a short rod 2 (1310) is fixedly connected to the inner wall of the notch (1309), and a transmission connection is achieved between the short rod 2 (1310) and the short rod 1 (1307) via a connecting plate (1311); A transmission assembly (14), wherein a tooth block (1401) is fixedly connected to the side wall of the moving block (1308), and the tooth block (1401) is meshedly connected with a gear 1 (1402), a gear shaft (1403) inserted inside the gear 1 (1402) is rotationally connected with the cavity (10), and the gear 1 (1402) is meshedly connected with a gear 2 (1404), and the gear 2 (1404) is sleeved on the outer ring of the rotating rod (11); A support assembly (15), wherein the inner wall of the cavity (10) is fixedly connected with a support block (1501), and the support block (1501) matches a square groove (1503) arranged inside the moving block (1308).

2. A photovoltaic silicon wafer screen printing device according to claim 1, characterized in that: The ball blocks (9) are provided in a plurality of pieces, and the ball blocks (9) are distributed in a straight line at equal intervals.

3. A photovoltaic silicon wafer screen printing device according to claim 1, characterized in that: The baffles (12) are provided in two pieces in number, and the two baffles (12) are symmetrically arranged, and the lower end of the baffle (12) contacts the top wall of the conveyor belt (8) and realizes a sliding connection.

4. A photovoltaic silicon wafer screen printing device according to claim 1, characterized in that: The side wall of the upper end of the linkage rod (1303) is fixedly connected with a protrusion (1304), and the outer walls of the linkage rod (1303) and the protrusion (1304) are in contact with the inner wall of the columnar groove (1305) provided inside the screw rod (1302) to achieve sliding connection.

5. A photovoltaic silicon wafer screen printing device according to claim 1, characterized in that: The discs (1306) are provided in two pieces which are symmetrically distributed up and down, a gap is left between the two discs (1306), and the disc (1306) located at the lower position matches the circular groove preset inside the cavity (10).

6. A photovoltaic silicon wafer screen printing device according to claim 1, characterized in that: The two ends of the connecting plate (1311) are rotatably connected to the outer walls of the first short rod (1307) and the second short rod (1310) through bearings.

7. The photovoltaic silicon wafer screen printing device according to claim 1, characterized in that: The top and bottom of the support block (1501) are fixedly connected to the side block (1502), and the side walls of the side block (1502) and the support block (1501) are in contact with the inner wall of the square channel (1503) to achieve sliding connection.

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