Scraper mechanism for silk-screen printing

Abstract

The utility model discloses a scraper mechanism for silk-screen printing, and belongs to the technical field of silk-screen printing. The scraper mechanism comprises a base and two scraper assemblies; the two scraper assemblies are arranged at intervals in the first direction, each scraper assembly comprises a linear lead screw module, a sliding rail assembly, an adapter seat, an air cylinder, a scraper seat and a scraper, the linear lead screw modules and the sliding rail assemblies are located on the base, and the linear lead screw modules, the air cylinders and the sliding rail assemblies are arranged at intervals in the second direction; the output end of the linear lead screw module is in transmission connection with the adapter seat, the sliding rail assembly extends in the third direction, the adapter seat and the scraper seat are arranged on the sliding rail assembly in a sliding mode, the scraper seat is located below the adapter seat, a cylinder body of the air cylinder is located on the adapter seat, a piston rod of the air cylinder is in transmission connection with the scraper seat, and the scraper is located on the scraper seat. According to the scraper mechanism for silk-screen printing, the printing efficiency is improved, and meanwhile the overall structure is more compact and reasonable.

Description

Technical Field

[0001] This utility model belongs to the field of screen printing technology, specifically relating to a squeegee mechanism for screen printing. Background Technology

[0002] Because the screen printing ink is permeable in the graphic areas but not in the non-graphic areas, during solar cell screen printing, ink is poured onto one end of the screen. The squeegee on the printing mechanism is lowered to contact the screen, applying pressure to the ink area while the printing mechanism moves to the other end. During this lateral movement, the ink is squeezed from the graphic areas onto the solar cells by the squeegee. Then, the squeegee is raised, the return ink blade is lowered, and the printing mechanism moves in the opposite direction, scraping the ink back to its initial position by the return ink blade, ready for the next printing cycle.

[0003] However, this printing method requires a certain amount of time for the ink to return to its source, which reduces printing efficiency as the printing process requires waiting for the ink to return. Utility Model Content

[0004] In view of the above-mentioned defects or improvement needs of the existing technology, this utility model provides a squeegee mechanism for screen printing, which aims to not only improve printing efficiency, but also make the overall structure more compact and reasonable.

[0005] To achieve the above objectives, this utility model provides a squeegee mechanism for screen printing, the squeegee mechanism comprising a base and two squeegee assemblies;

[0006] Two scraper assemblies are arranged at a distance along a first direction. Each scraper assembly includes a linear screw module, a slide rail assembly, an adapter, a cylinder, a scraper seat, and a scraper. The linear screw module and the slide rail assembly are both located on the base. The linear screw module, the cylinder, and the slide rail assembly are arranged at a distance along a second direction. The output end of the linear screw module is throttlely connected to the adapter to drive the adapter to move up and down along a third direction. The slide rail assembly extends along a third direction. The adapter and the scraper seat are slidably arranged on the slide rail assembly, and the scraper seat is located below the adapter. The cylinder body is located on the adapter, and the piston rod of the cylinder is throttlely connected to the scraper seat to drive the scraper seat to move up and down along a third direction. The scraper is located on the scraper seat. The scraper mechanism is configured such that the two scrapers move up and down alternately along a third direction.

[0007] Among them, the first direction and the second direction are two perpendicular directions in the horizontal plane, and the third direction is the vertical direction.

[0008] Optionally, the two scrapers are parallel in the second direction, spaced apart along the first direction, and arranged facing each other.

[0009] Optionally, each of the scrapers has an inclined surface on the bottom side facing the corresponding scraper, and the distance between the two inclined surfaces gradually increases in the vertically downward direction.

[0010] Optionally, the piston rod of the cylinder contacts the scraper seat, a connecting rod is provided on the cylinder body of the cylinder, the axial direction of the connecting rod is arranged along a third direction, and an outer flange is provided at the bottom end of the connecting rod for supporting the scraper seat.

[0011] Optionally, a limiting block is provided on the scraper seat, the bottom end of the connecting rod passes through the limiting block, and the outer flange is located below the limiting block to support the limiting block.

[0012] Optionally, each of the slide rail assemblies includes two slide rails spaced apart along a second direction, and both ends of the adapter and the scraper seat are slidably arranged on the corresponding slide rails.

[0013] Optionally, each of the slide rails may be slidably provided with a first slider and a second slider, with the second slider located below the first slider. The two ends of the adapter are respectively fixed on the two corresponding first sliders, and the two ends of the scraper seat are respectively fixed on the two corresponding second sliders.

[0014] Optionally, the base includes a front cover, a frame, and a rear cover. The front cover and the rear cover are spaced apart along a first direction, and the front cover, the frame, and the rear cover enclose a sealed space. The linear screw module is located on the top of the frame. The output end of the linear screw module, the slide rail assembly, the adapter seat, the cylinder, and the top of the scraper seat are all located within the sealed space. The bottom of the scraper seat penetrates through the bottom of the frame and connects to the scraper. Alternatively, the frame has slots on both sides, the middle of the frame is the inner wall of the frame, and a scraper assembly is respectively provided on the two oppositely arranged first and second plate surfaces of the inner wall of the frame.

[0015] Optionally, the linear lead screw module includes a motor, a mounting base, a lead screw, and a nut. The motor and the mounting base are both located on the base. The lead screw is rotatably arranged on the mounting base, and the axial direction of the lead screw is arranged along a third direction. The output end of the motor is connected to the lead screw for transmission. The nut is sleeved on the lead screw and inserted into the adapter. And / or, the two linear lead screw modules and the two cylinders corresponding to the two scraper assemblies are arranged at intervals in the first direction and the second direction.

[0016] Optionally, each of the scrapers is mounted on the scraper seat by at least one bolt, with the two bolts corresponding to the two scraper assemblies arranged at intervals and the nuts of the two bolts facing the same side, or the two bolts corresponding to the two scraper assemblies are arranged symmetrically along the central axis between the two scrapers.

[0017] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0018] In summary, the beneficial effects of the above-described technical solutions conceived by this utility model compared with the prior art include:

[0019] In the squeegee mechanism for screen printing provided in this embodiment of the invention, when printing on battery cells, firstly, for one squeegee assembly, the linear screw module drives the adapter to move downwards. During the downward movement of the adapter, the cylinder, squeegee seat, and squeegee descend until the squeegee contacts the screen. Next, the lateral drive module drives the squeegee mechanism to move laterally, causing the squeegee mechanism to move forward, completing one printing pass and pushing the ink to the end of the screen. Then, the squeegee assembly drives the squeegee to move upwards, and another squeegee assembly drives another squeegee to move downwards to contact the screen. The lateral drive module then drives the squeegee mechanism to move in the opposite direction, completing the second printing pass and pushing the ink to the front of the screen. This process continues, with the two squeegees alternately rising and falling, thus performing alternating printing. This squeegee mechanism, through another squeegee assembly, completes the printing process while simultaneously replacing the ink return action, eliminating the need to wait for the ink knife to return ink, thereby improving printing efficiency.

[0020] Furthermore, the two scraper assemblies are arranged at intervals along the first direction, achieving a back-to-back arrangement. Moreover, since the linear screw module, cylinder, and slide rail assembly are arranged at intervals along the second direction, a staggered arrangement of the linear screw module, cylinder, and slide rail assembly in the second direction is achieved. This avoids the problem of excessive thickness of the scraper mechanism caused by their stacking arrangement in the first direction, resulting in a more compact and rational overall structure.

[0021] In other words, the squeegee mechanism for screen printing provided by this utility model not only improves printing efficiency, but also has a more compact and reasonable overall structure. Attached Figure Description

[0022] Figure 1 This is a first view of a squeegee mechanism for screen printing provided in an embodiment of the present invention;

[0023] Figure 2 This is a second view of a squeegee mechanism for screen printing provided in an embodiment of the present invention;

[0024] Figure 3This is a schematic diagram of the arrangement of the two scrapers provided in an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the arrangement of two scrapers in current technology;

[0026] Figure 5 This is a cross-sectional view of the scraper mechanism provided in an embodiment of this utility model.

[0027] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0028] 1. Base; 11. Frame; 12. Inner wall of frame; 2. Scraper assembly; 21. Linear screw module; 211. Motor; 212. Mounting seat; 213. Screw; 214. Nut; 22. Slide rail assembly; 221. Slide rail; 222. First slider; 223. Second slider; 23. Adapter seat; 24. Cylinder; 25. Scraper seat; 26. Scraper; 261. Inclined surface; 27. Connecting rod; 271. Outer flange; 28. Limiting block; 29. ​​Bolt; 100. Slurry. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] In the description of this utility model, it should be understood that, unless otherwise specified, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] Furthermore, unless otherwise specified, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] Example:

[0035] Figure 1 This is a first view of a squeegee mechanism for screen printing provided in an embodiment of the present invention. Figure 2 This is a second view of a squeegee mechanism for screen printing provided in an embodiment of the present invention, combined with... Figure 1 and 2 As shown, the scraper mechanism includes a base 1 and two scraper assemblies 2.

[0036] The two scraper assemblies 2 are along the first direction (e.g.) Figure 1 Arranged at intervals along the X-axis, each scraper assembly 2 includes a linear screw module 21, a slide rail assembly 22, an adapter 23, a cylinder 24, a scraper holder 25, and a scraper 26. The linear screw module 21 and the slide rail assembly 22 are both located on the base 1. The linear screw module 21, the cylinder 24, and the slide rail assembly 22 are arranged along the second direction (e.g., along the X-axis). Figure 1 The linear screw module 21 is arranged at intervals along the Y-axis direction, and its output end is connected to the adapter 23 for transmission, so as to drive the adapter 23 along a third direction (e.g., along the Y-axis direction). Figure 1The slide rail assembly 22 extends along the third direction (Z-axis direction) for vertical movement. Both the adapter 23 and the scraper holder 25 are slidably arranged on the slide rail assembly 22, with the scraper holder 25 located below the adapter 23. The cylinder body of the cylinder 24 is located on the adapter 23, and the piston rod of the cylinder 24 is connected to the scraper holder 25 to drive it to move up and down along the third direction. The scraper 26 is located on the scraper holder 25. The scraper mechanism is configured such that two scrapers 26 alternately move up and down along the third direction for alternating printing. The first and second directions are two perpendicular directions within the horizontal plane, and the third direction is a vertical direction.

[0037] In the squeegee mechanism for screen printing provided in this embodiment of the present invention, when printing on battery cells, firstly, for one squeegee assembly 2, the linear screw module 21 drives the adapter 23 to move downward. During the downward movement of the adapter 23, the cylinder 24, squeegee seat 25, and squeegee 26 descend until the squeegee 26 contacts the screen. Next, the lateral movement drive module drives the squeegee mechanism to move laterally, causing the squeegee mechanism to move forward, completing one printing pass and simultaneously pushing the ink to the end of the screen. Then, the squeegee assembly 2 drives the squeegee 26 to move upward, and another squeegee assembly 2 drives another squeegee 26 to move downward until it contacts the screen. The lateral movement drive module then drives the squeegee mechanism to move in the opposite direction, completing the second printing pass and simultaneously pushing the ink to the front of the screen. This process continues, with the two squeegees 26 alternating in raising and lowering, thus performing alternating printing. This squeegee mechanism, through another squeegee assembly 2, replaces the ink return action while completing the printing process, eliminating the need to wait for the ink knife to return ink, thereby improving printing efficiency.

[0038] Furthermore, the two scraper assemblies 2 are arranged at intervals along the first direction, achieving a back-to-back arrangement. Moreover, since the linear screw module 21, cylinder 24, and slide rail assembly 22 are arranged at intervals along the second direction, a staggered arrangement of the linear screw module 21, cylinder 24, and slide rail assembly 22 in the second direction is achieved. This avoids the problem of excessive thickness of the scraper mechanism caused by their stacking arrangement in the first direction, resulting in a more compact and rational overall structure.

[0039] In other words, the squeegee mechanism for screen printing provided by this utility model not only improves printing efficiency, but also has a more compact and reasonable overall structure.

[0040] It is easy to understand that during the printing process, the cylinder 24 is always in the extended state, thereby preventing the doctor blade 26 from making hard contact with the screen during the downward movement and printing process by compressing the gas in the cylinder 24.

[0041] It should be noted that this doctor blade assembly 2 is compatible with the installation of ink return blades, steel blades, and other processes requiring ink return and steel blade specifications.

[0042] In one implementation of this utility model, the linear lead screw module 21 includes a motor 211, a mounting base 212, a lead screw 213, and a nut 214. The motor 211 and mounting base 212 are both located on the base 1. The lead screw 213 is rotatably arranged on the mounting base 212, and its axial direction is along a third direction. The output end of the motor 211 is connected to the lead screw 213 for transmission. The nut 214 is sleeved on the lead screw 213 and inserted into the adapter 23. During operation, the motor 211 drives the lead screw 213 to rotate, and under the axial limiting of the slide rail assembly 22, the rotation of the lead screw 213 is ultimately converted into the vertical movement of the nut 214 and the adapter 23.

[0043] In addition, the linear screw module 21 has high displacement accuracy, which can achieve precise control over the lifting and lowering of the scraper 26.

[0044] Figure 3 This is a schematic diagram of the arrangement of the two scrapers provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the two scrapers 26 are parallel in the second direction, spaced apart along the first direction, and arranged facing each other.

[0045] It is easy to understand that when the slurry 100 is arranged between the two scrapers 26, and the slurry zone space formed by the slurry 100 is the same, the distance L1 between the two parallel scrapers 26 is smaller than that between the two scrapers arranged in a figure-eight pattern (see...). Figure 4 The distance L2 between the two doctor blades. Furthermore, the larger the distance between the two doctor blades, the longer the stroke required to print the same size battery cell, resulting in a longer printing time and lower output. Therefore, compared to a triangular slurry area, the rectangular slurry area formed by the two parallel and spaced doctor blades 26 in this doctor blade mechanism can reduce the distance between the doctor blades 26 while maintaining the same slurry area size, thereby increasing output.

[0046] Furthermore, each doctor blade 26 has an inclined surface on its bottom side facing the corresponding doctor blade 26, and the distance L between the two inclined surfaces 261 gradually increases in the vertically downward direction. When the doctor blade 26 moves laterally, the inclined surfaces 261 can apply a downward pressure to the paste 100, thereby reliably printing the paste onto the battery cell.

[0047] For example, the other side of the bottom of each scraper 26 also has a bevel, that is, the bottom of the scraper 26 is a conical structure.

[0048] In this embodiment, each squeegee 26 is arranged perpendicular to the first direction, and the lateral movement direction of the squeegee mechanism is the first direction. Both squeegees 26 are located directly below the center of the base 1, resulting in good bidirectional printing consistency.

[0049] In this embodiment, the piston rod of the cylinder 24 contacts the scraper seat 25, and a connecting rod 27 is provided on the cylinder body of the cylinder 24. The axial direction of the connecting rod 27 is arranged along the third direction, and an outer flange 271 is provided at the bottom end of the connecting rod 27. The outer flange 271 is used to support the scraper seat 25.

[0050] In the above embodiment, on the one hand, the piston rod of the cylinder 24 abuts against the scraper seat 25, which facilitates the installation of the cylinder 24 and the transmission between the cylinder 24 and the scraper seat 25. On the other hand, during the descent of the scraper 26 relative to the screen, the connecting rod 27 and the outer flange 271 prevent the scraper seat 25 from detaching from the piston rod of the cylinder 24 and falling off the slide rail assembly 22 (at this time, the outer flange 271 is always in contact with the scraper seat 25). During the contact between the squeegee 26 and the screen, the squeegee 26 and the squeegee holder 25 are acted upon by the reaction force of the screen. At this time, the squeegee 26 and the squeegee holder 25 will squeeze the piston rod, causing the piston rod to retract. The squeegee 26 and the squeegee holder 25 will move upward relative to the cylinder body, thus ultimately separating the squeegee holder 25 from the outer flange 271. During the upward movement of the cylinder 24 after printing, the outer flange 271 will re-contact with the squeegee holder 25, bringing the squeegee 26 assembly and the squeegee 26 upward (while the piston rod will extend and reset).

[0051] It is easy to understand that during the printing process, the piston rod of cylinder 24 is compressed (at this time, the connecting rod 27 exerts no force on the doctor blade seat 25). At this time, the printing pressure generated by the doctor blade 26 is equal to the sum of the thrust of cylinder 24 and the weight of doctor blade 26 and doctor blade seat 25. Therefore, the thrust of cylinder 24 can be controlled by precisely controlling the air pressure, thereby ultimately controlling the printing pressure.

[0052] Furthermore, a limiting block 28 is provided on the scraper seat 25, the bottom end of the connecting rod 27 passes through the limiting block 28, and the outer flange 271 is located below the limiting block 28 to support the limiting block 28.

[0053] In the above embodiment, the outer flange 271 can more reliably support the limiting block 28 by passing through the connecting rod 27, thereby ultimately achieving reliable support for the scraper seat 25.

[0054] For example, the limiting block 28 has a square structure.

[0055] like Figure 2 As shown, each slide rail assembly 22 includes two slide rails 221 arranged at intervals. Both ends of the adapter 23 and the scraper seat 25 can be slidably arranged on the corresponding slide rails 221. The two slide rails 221 can ensure that the lifting and lowering of the adapter 23 and the scraper seat 25 is more stable.

[0056] For example, the linear screw module 21 and the cylinder 24 are located between two slide rails 221.

[0057] See Figure 5 In one implementation of this utility model, each slide rail 221 is slidably provided with a first slider 222 and a second slider 223, and the second slider 223 is located below the first slider 222. The two ends of the adapter 23 are respectively fixed on the two corresponding first sliders 222, and the two ends of the scraper seat 25 are respectively fixed on the two corresponding second sliders 223, thereby realizing the sliding installation of the adapter 23 and the scraper seat 25 through the sliders.

[0058] It should be noted that the number of the first slider 222 and the second slider 223 can be one or two, etc., and this utility model does not limit this.

[0059] In this embodiment, the base 1 includes a front cover (not shown), a frame 11, and a rear cover. The front cover and the rear cover are arranged at intervals along a first direction, and the front cover, the frame 11, and the rear cover enclose a sealed space. The linear screw module 21 is located on the top of the frame 11. The output end of the linear screw module 21, the top of the slide rail assembly 22, the adapter 23, the cylinder 24, and the scraper seat 25 are all located within the sealed space. The bottom of the scraper seat 25 passes through the bottom of the frame 11 and is connected to the scraper 26.

[0060] In the above embodiments, the sealed space can seal the components, and when maintenance is required, the front cover or the rear cover can be easily removed and installed, thereby facilitating daily oiling and replacement and improving operation.

[0061] For example, both motors 211 are fixed on the top outer wall of the frame 11, and the two motors 211 are staggered (i.e., the two motors 211 are spaced apart in both the first and second directions), thereby reducing the overall length of the two scraper assemblies 2 in the second direction, and thus reducing the length of the entire scraper mechanism.

[0062] Furthermore, the frame 11 is constructed with slots on both sides to avoid splicing of sheet metal. The middle part of the frame 11 is the inner wall 12, on which two sets of scraper assemblies are installed on two opposite first and second plates of the inner wall 12, forming a back-to-back arrangement to enhance the overall structural strength. Specifically, the two slide rails 221 of one scraper assembly 2 are located on the first plate of the inner wall 12, and the two slide rails 221 of the other scraper assembly 2 are located on the second plate of the inner wall 12. The center of the inner wall 12 has a clearance hole to allow for clearance of the adapter 23. Simultaneously, the two linear screw modules 21 and two cylinders 24 corresponding to the two scraper assemblies are spaced apart in both the first and second directions, further saving space.

[0063] In this embodiment, each scraper 26 is mounted on the scraper seat 25 by at least one bolt 29.

[0064] In one implementation of this utility model, the two bolts 29 corresponding to the two scraper assemblies 2 are arranged at intervals, and the nuts of the two bolts 29 face the same side. At this time, the scraper 26 can be easily disassembled and assembled from the same side by removing and assembling the bolts, which can be applied to front and rear printing.

[0065] For example, such as Figure 1 There is one bolt 29 on the front scraper 26, located in the middle; there are two bolts 29 on the rear scraper 26, located on both sides. The nuts of all three bolts 29 face forward, which facilitates the disassembly and assembly of the scraper 26 on the same side.

[0066] It should be noted that in other embodiments of this utility model, the two bolts 29 corresponding to the two scraper assemblies 2 can also be arranged symmetrically along the central axis between the two scrapers 26, that is, the nuts of the two bolts 29 face opposite directions, which can be applied to left and right printing.

[0067] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A squeegee mechanism for screen printing, characterized in that, The scraper mechanism includes a base and two scraper assemblies; Two scraper assemblies are arranged at a distance along a first direction. Each scraper assembly includes a linear screw module, a slide rail assembly, an adapter, a cylinder, a scraper seat, and a scraper. The linear screw module and the slide rail assembly are both located on the base. The linear screw module, the cylinder, and the slide rail assembly are arranged at a distance along a second direction. The output end of the linear screw module is throttlely connected to the adapter to drive the adapter to move up and down along a third direction. The slide rail assembly extends along a third direction. The adapter and the scraper seat are slidably arranged on the slide rail assembly, and the scraper seat is located below the adapter. The cylinder body is located on the adapter, and the piston rod of the cylinder is throttlely connected to the scraper seat to drive the scraper seat to move up and down along a third direction. The scraper is located on the scraper seat. The scraper mechanism is configured such that the two scrapers move up and down alternately along a third direction. Among them, the first direction and the second direction are two perpendicular directions in the horizontal plane, and the third direction is the vertical direction.

2. The squeegee mechanism for screen printing according to claim 1, characterized in that, The two scrapers are parallel in the second direction, spaced apart along the first direction, and arranged facing each other.

3. The squeegee mechanism for screen printing according to claim 2, characterized in that, Each of the scrapers has an inclined surface on the bottom side facing the corresponding scraper, and the distance between the two inclined surfaces gradually increases in the vertically downward direction.

4. The squeegee mechanism for screen printing according to claim 1, characterized in that, The piston rod of the cylinder contacts the scraper seat. A connecting rod is provided on the cylinder body. The connecting rod is arranged axially along a third direction. An outer flange is provided at the bottom end of the connecting rod. The outer flange is used to support the scraper seat.

5. A squeegee mechanism for screen printing according to claim 4, characterized in that, The scraper holder is provided with a limiting block, the bottom end of the connecting rod passes through the limiting block, and the outer flange is located below the limiting block to support the limiting block.

6. A squeegee mechanism for screen printing according to claim 1, characterized in that, Each of the slide rail assemblies includes two slide rails spaced apart along a second direction, and both ends of the adapter and the scraper seat are slidably arranged on the corresponding slide rails.

7. A squeegee mechanism for screen printing according to claim 6, characterized in that, Each of the slide rails is slidably provided with a first slider and a second slider, and the second slider is located below the first slider. The two ends of the adapter are respectively fixed on the two corresponding first sliders, and the two ends of the scraper seat are respectively fixed on the two corresponding second sliders.

8. A squeegee mechanism for screen printing according to any one of claims 1-7, characterized in that, The base includes a front cover, a frame, and a rear cover. The front cover and the rear cover are arranged at intervals along a first direction, and the front cover, the frame, and the rear cover enclose a sealed space. The linear screw module is located on the top of the frame. The output end of the linear screw module, the slide rail assembly, the adapter seat, the cylinder, and the top of the scraper seat are all located within the sealed space. The bottom of the scraper seat penetrates through the bottom of the frame and connects to the scraper. Alternatively, the frame has slots on both sides, and the middle part of the frame is the inner wall of the frame. Two oppositely arranged first and second plate surfaces of the inner wall of the frame are respectively provided with a scraper assembly.

9. A squeegee mechanism for screen printing according to any one of claims 1-7, characterized in that, The linear lead screw module includes a motor, a mounting base, a lead screw, and a nut. The motor and the mounting base are both located on the base. The lead screw is rotatably arranged on the mounting base, and the axial direction of the lead screw is arranged along a third direction. The output end of the motor is connected to the lead screw for transmission. The nut is sleeved on the lead screw and inserted into the adapter. And / or, the two linear lead screw modules and the two cylinders corresponding to the two scraper assemblies are arranged at intervals in the first direction and the second direction.

10. A squeegee mechanism for screen printing according to any one of claims 1-7, characterized in that, Each of the scrapers is mounted on the scraper seat by at least one bolt. The two bolts corresponding to the two scraper assemblies are arranged at intervals, and the nuts of the two bolts face the same side, or the two bolts corresponding to the two scraper assemblies are arranged symmetrically along the central axis between the two scrapers.

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