Vision positioning shuttle screen printing machine

Abstract

The present invention discloses a visual positioning shuttle screen printing machine, including a printed part image acquisition device, a shuttle transmission mechanism, a screen image acquisition device, a screen frame clamping adjustment mechanism, a printing mechanism and a control system; the printed part image acquisition device is used to acquire the image of the printed part to be printed on the shuttle transmission mechanism; the shuttle transmission mechanism is used to transport the printed part to be printed at the upper sheet end to the bottom of the screen for printing, and to transport the printed part after printing to the lower sheet end of the screen printing machine. The above technical scheme changes the previous method of adjusting the angle of the printed part for plate alignment before each printing, and instead obtains the image of the printed part to be printed and the screen image through visual recognition technology, and adjusts the position and angle of the screen with the printed part image as a reference, thereby simplifying the plate adjustment structure, improving the alignment speed of the screen and the printed part, and effectively improving the operating efficiency of the screen printing machine.

Description

Technical Field

[0001] The invention relates to a visual positioning shuttle screen printing machine, in particular to an efficient shuttle screen printing machine which can adjust the screen position by visual positioning, and belongs to the technical field of printing machinery and equipment. Background Art

[0002] The output and yield rate of the printing production line are mainly subject to the working efficiency and printing accuracy of the printing equipment. If the method of positioning first, then transmitting, and then printing is adopted, the printing accuracy is low. If the table positioning method is adopted, the printing efficiency is low. In addition, traditional printing equipment uses a reduction motor or a servo motor + a reduction gear as the power source, and prints through a pulley drive. It is suitable for products with low printing accuracy requirements, but it is powerless for printing accuracy requirements to reach the micron level, especially in the emerging photovoltaic cell printing industry. The high requirements for printing accuracy and efficiency cannot be met by traditional printing machines. The high-precision and high-efficiency screen printing machine for solar cell panels in the solar industry has always been a bottleneck restricting the development of the industry. The screen printing accuracy of 8μm and the production cycle of 0.96 seconds per panel for 210-specification cells are technical difficulties. Most screen printers for cells and wafers have complex structures and relatively low reliability. Simplifying the structure to improve reliability is a technical difficulty. The characteristics of screen printing are basically the same for screen printing of battery cells, screen printing of semiconductor wafers, screen printing of solder paste for BGA chips in the semiconductor industry, and ball planting process. They are high-precision, high-efficiency, and require high equipment reliability. A highly compatible screen printer is a technical difficulty. At present, domestic screen printers in this industry are all turntable screen printers. The turntable of this type of printer uses a DD motor or a cam divider for circular drive. There are generally 4 printing stations, and each station has a separate transmission and blowing and suction system. For example, the screen printer structure disclosed in Chinese patent document CN102642385B is complex and costly, and its reliability and maintainability are relatively poor. The production cycle for 210-specification battery cells is mostly around 1.2 seconds. Most of the registration methods are fine-tuning screen methods, which are divided into three actuators, X, Y, θ, and are independently adjusted in three layers. Each actuator has a separate drive motor and guide mechanism. For example, the applicant's prior Chinese patent application CN107685531A discloses a fully automatic glass printing machine visual automatic registration system. The registration system of this structure is relatively complex, large in size, has many calculation processes, and has a high failure rate and a relatively short maintenance cycle. Summary of the invention

[0003] Therefore, the object of the present invention is to provide a visual positioning shuttle screen printing machine, which collects the image of the printed work before each printing, adjusts the position of the screen according to the position of the printed work, and accurately aligns the position of the screen and the printed work, thereby improving the printing accuracy of the screen printing.

[0004] In order to achieve the above-mentioned purpose, a visual positioning shuttle screen printing machine of the present invention includes a printed part image acquisition device, a shuttle transmission mechanism, a screen image acquisition device, a screen frame clamping and adjusting mechanism, a printing mechanism and a control system; the printed part image acquisition device is used to acquire the image of the printed part to be printed on the shuttle transmission mechanism; the shuttle transmission mechanism is used to transport the printed part to be printed at the upper sheet end to the bottom of the screen for printing, and is used to transport the printed part after printing to the lower sheet end of the screen printing machine; the screen frame of the screen is arranged on the screen frame clamping and adjusting mechanism; the screen image acquisition device is used to acquire the screen image; the control system is used to control the screen frame clamping and adjusting mechanism to adjust the position of the screen according to the position information of the printed part to be printed in the printed part image so that the screen can be aligned with the printed part; the printing mechanism is used to print the printed part.

[0005] The printed part image acquisition device is arranged at the upper sheet end of the screen printing machine; the printed part image acquisition device includes a bracket, a camera mounting plate arranged on the bracket and a first camera arranged on the camera mounting plate, and the visual axis of the first camera is arranged vertically downward.

[0006] The printed part image acquisition device also includes a first auxiliary light source.

[0007] The screen image acquisition device is arranged below the screen; the screen image acquisition device comprises a mounting frame and a second camera arranged on the mounting frame, and the visual axis of the second camera is arranged vertically upward.

[0008] A second auxiliary light source is also arranged on the installation frame.

[0009] The screen frame clamping and adjusting mechanism includes two adjusting arms; the adjusting arm includes a fixing component and an adjusting component, the fixing component is used to be fixed on the screen frame, and the adjusting component is used to move the fixing component; the adjusting component includes a linear sliding member and a linear driving device for driving the linear sliding member to move, and the fixing component is rotatably mounted on the linear sliding member through a rotating shaft; in one of the adjusting arms, the shaft seat of the rotating shaft is connected to the fixing component through a compensating slide rail.

[0010] The fixing assembly comprises a screen frame mounting plate and a screen frame pressing plate, and the edge of the screen frame is clamped between the screen frame mounting plate and the screen frame pressing plate.

[0011] The linear slide is arranged on the slide rail on the adjusting arm; the linear drive device comprises an adjusting motor, an adjusting screw and an adjusting nut arranged on the adjusting screw, and the adjusting nut is connected to the linear slide via a connecting plate.

[0012] The two adjusting arms are connected via a connecting rod.

[0013] The printing mechanism includes a base, a printing head frame and a printing head. The printing head frame is slidably installed on the base, and a printing drive device is provided on the base to drive the printing head frame to move; the printing head is arranged on the printing head frame, and includes a printing knife and an ink return knife. The printing knife and the ink return knife are respectively connected to a lifting device.

[0014] The printing drive device comprises a first linear motor, a fixed part of the first linear motor is fixed on the base, and a movable part is fixed to the printing head frame.

[0015] The lifting device comprises a lifting motor, a lifting screw arranged at the power output end of the lifting motor, and a lifting nut matched with the lifting screw, and the lifting nut is connected with the printing knife or the ink return knife.

[0016] Each lifting nut is fixed to two clamping plates, and the two clamping plates are clamped on two guide shafts, and the guide shafts are connected to the printing knife or the ink return knife.

[0017] The shuttle transmission mechanism includes a base and two shuttle assemblies installed on the base, the base is long and is arranged below the printing mechanism; the shuttle assembly includes a vertically arranged shuttle bottom plate and a horizontally arranged mounting plate, one side of the mounting plate is provided with a pillar, and the pillar is slidably installed on the shuttle bottom plate; the mounting plate is provided with a table for carrying printed parts; a lifting drive device is provided on the shuttle bottom plate, and the lifting drive device is used to drive the mounting plate to rise and fall; the shuttle bottom plates of the two shuttle assemblies are respectively slidably installed on both sides of the base, and the mounting plate is located above the base and can move the table to the vertical bottom of the screen; the shuttle assembly also includes a horizontal drive device arranged on the base, and the horizontal drive device is used to drive the shuttle bottom plate to move horizontally along the base.

[0018] Guide rails are respectively arranged on two opposite side walls of the base, and the shuttle bottom plate is installed on the guide rails through a sliding block.

[0019] The transverse drive device includes a second linear motor; two upper and lower guide rails are respectively arranged on the two side walls of the base, the second linear motor is arranged between the two guide rails, the fixed part of the second linear motor is fixed on the base, and the moving part is fixed to the shuttle bottom plate.

[0020] The lifting drive device comprises a lifting drive motor, a lifting drive lead screw arranged at the power output end of the lifting drive motor, and a lifting drive nut matched with the lifting drive lead screw, and the lifting drive nut is fixed to the support.

[0021] The screen image acquisition device is arranged on the base and below the screen.

[0022] The base is a marble base.

[0023] The table top is provided with an array of negative pressure holes, which are connected to a negative pressure device through pipelines.

[0024] By adopting the above technical solution, the visual positioning shuttle screen printing machine of the present invention has the following beneficial effects compared with the prior art:

[0025] 1. The previous method of adjusting the angle of the printed part for plate alignment before each printing has been changed. Instead, the image of the printed part to be printed and the screen image are obtained through visual recognition technology, and the position and angle of the screen are adjusted based on the printed part image, thereby simplifying the plate adjustment structure, improving the alignment speed of the screen and the printed part, and effectively improving the operating efficiency of the screen printing machine.

[0026] 2. A new type of screen frame clamping adjustment mechanism is set up, which can drive two linear slides through two linear drive devices to achieve position adjustment and angle adjustment of the screen in the Y direction, and adjust the position of the printed part on the X axis through the shuttle transmission mechanism, so as to achieve alignment between the screen and the printed part, which greatly simplifies the structure of screen adjustment;

[0027] 3. The printing mechanism drives the printing head to reciprocate through a linear motor, and drives the printing knife and ink return knife to rise and fall through a motor lead screw drive device, which can complete the printing action efficiently and accurately.

[0028] 4. The shuttle transmission mechanism adopts a double shuttle assembly structure, and the printed parts can be transmitted alternately through the two shuttle assemblies. The mounting plates in the two shuttle assemblies can be raised and lowered. A pillar is fixed on one side of the mounting plate, and the pillars in the two shuttle assemblies are located on both sides of the base. Therefore, the two shuttle assemblies will not interfere with each other when the printed parts are transmitted alternately, and uninterrupted alternating transmission can be achieved, effectively improving the working efficiency. The overall structure of the shuttle transmission mechanism is simple and compact, occupies a small space, and operates stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of the visual positioning shuttle screen printing machine of the present invention.

[0030] Figure 2 It is a side view of the visual positioning shuttle screen printing machine of the present invention.

[0031] Figure 3 It is a structural diagram of the body frame.

[0032] Figure 4 It is a structural schematic diagram of the screen frame clamping and adjusting mechanism.

[0033] Figure 5This is an assembly drawing of the screen frame installed on the screen frame clamping and adjusting mechanism.

[0034] Figure 6 is a cross-sectional view of the first adjusting arm.

[0035] Figure 7 is a cross-sectional view of the second adjusting arm.

[0036] Figure 8 It is a schematic structural diagram of the second regulating arm.

[0037] Fig. 9 It is a schematic diagram of the assembly mechanism of the compensating slide rail in the second adjusting arm.

[0038] Fig.10 It is a structural diagram of the printing mechanism.

[0039] Fig.11 It is a structural schematic diagram of the shuttle transmission mechanism.

[0040] Fig.12 A top view of the shuttle transmission mechanism.

[0041] Fig.13 Schematic diagram of the structure of the shuttle assembly.

[0042] Fig.14 It is a structural schematic diagram of a printed image acquisition device.

[0043] Fig.15 It is a side view of the printed part image acquisition device.

[0044] Fig.16 It is a structural schematic diagram of the screen image acquisition device. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below through the accompanying drawings and specific embodiments.

[0046] like Figure 1 , 2 As shown, a visual positioning shuttle screen printing machine of the present invention includes a body frame 1, a printed part image acquisition device 5, a shuttle transmission mechanism 4, a screen image acquisition device 6, a screen frame clamping and adjusting mechanism 2, a printing mechanism 3 and a control system.

[0047] like Figure 3 As shown, the machine frame 1 includes two parts: a bottom frame lower table 101 and a frame body 102. Fixed baffles 104 and auxiliary angle seats 105 are arranged on both sides of the bottom frame lower table 101. An anchor 106 is installed under the bottom frame lower table 101. An upper table 103 for installing the screen frame clamping adjustment mechanism 2 and the printing mechanism 3 is arranged above the frame body 102.

[0048] like Figure 4-9 As shown, the screen frame clamping and adjusting mechanism 2 includes two parallelly arranged adjusting arms 201 , namely a first adjusting arm 201 a and a second adjusting arm 201 b , and the two adjusting arms 201 are connected by a connecting rod 202 .

[0049] The adjusting arm 201 includes a fixing component and an adjusting component. The fixing component is used to be fixed on the screen frame 210, and includes a screen frame mounting plate 208 and a screen frame pressing plate 209. The edge of the screen frame 210 is clamped between the screen frame mounting plate 208 and the screen frame pressing plate 209. The adjusting component is used to move the fixing component, and includes a linear slide 206 and a linear driving device for driving the linear slide 206 to move. The screen frame mounting plate 208 is rotatably mounted on the linear slide 206 through a rotating shaft 207.

[0050] In the first adjusting arm 201a, the shaft seat 207a of the rotating shaft 207 is fixedly connected to the screen frame mounting plate 208. In the second adjusting arm 201b, a compensating slide rail 211 is arranged on the shaft seat 207a of the rotating shaft 207, a slider connecting plate 212 is fixed on the screen frame mounting plate 208, and a compensating slider 213 matching the compensating slide rail 211 is arranged on the slider connecting plate 212, so that the fixed component and the shaft seat 207a can slide relative to each other, thereby ensuring that the screen frame 210 can rotate when the strokes of the linear slides 206 of the two adjusting arms 201 are inconsistent.

[0051] The linear slide 206 is arranged on the slide rail 206a on the adjustment arm 201; the linear drive device includes an adjustment motor 203, an adjustment screw 204 and an adjustment nut 204a arranged on the adjustment screw 204, and the adjustment nut is connected to the linear slide 206 through a connecting plate 205.

[0052] During assembly, the sliding direction (Y direction) of the linear slide 206 can be set perpendicular to the transmission direction (X direction) of the shuttle transmission mechanism 4. Therefore, when the position of the screen in the Y direction needs to be adjusted, the two linear drive devices drive the two linear slides 206 to move with the same stroke; when the angle of the screen needs to be rotated, the two linear drive devices drive the two linear slides 206 to move with different strokes; and when there is a deviation between the screen and the printed part in the X direction, the position of the printed part in the X direction is adjusted by controlling the shuttle transmission mechanism 4 for alignment.

[0053] like Fig.10As shown, the printing mechanism 3 is arranged on the upper table 103 of the machine body frame 1, and the printing mechanism 3 includes a base 301, a printing head frame 304 and a printing head. A linear slide 303 is arranged on the base 301, and the printing head frame 304 is installed on the linear slide 303. A printing drive device is arranged on the base 301 to drive the printing head frame 304 to move, and the printing drive device includes a first linear motor 302, and the fixed part of the first linear motor 302 is fixed on the base 301, and the movable part is fixed to the printing head frame 304.

[0054] The printing head is arranged on the printing head frame 304, and includes a printing knife 311 and an ink return knife 310. The printing knife 311 and the ink return knife 310 are respectively connected to a lifting device. The lifting device includes a lifting motor, a lifting screw (not shown in the figure) arranged at the power output end of the lifting motor, and a lifting nut 307 matched with the lifting screw. The lifting nut 307 is connected to the printing knife 311 or the ink return knife 310. Among the two lifting motors, the printing motor 305 is used to drive the lifting action of the printing knife 311, and the ink return motor 306 is used to drive the lifting action of the ink return knife 310. Each of the lifting nuts 307 is fixed to two clamps 308, and the two clamps 308 are clamped on two guide shafts 309, and the guide shafts 309 are connected to the printing knife 311 or the ink return knife 310. By setting the driver, the ink return knife 310 and the printing knife 311 can be moved left and right and up and down in an orderly manner, and the screen is scraped to complete the printing.

[0055] like Figure 11-13 As shown, the shuttle transmission mechanism 4 is arranged on the lower table 101 of the bottom frame. The shuttle transmission mechanism 4 includes a pad 401, a marble base 402 and two shuttle assemblies mounted on the marble base 402. The marble base 402 is long and arranged below the printing mechanism 3. The two shuttle assemblies are respectively a shuttle assembly 1 406 and a shuttle assembly 2 405.

[0056] Each shuttle assembly includes a vertically arranged shuttle bottom plate 407 and a horizontally arranged mounting plate 412. A support 411 is arranged on one side of the mounting plate 412. The support 411 is slidably mounted on the lifting guide rail 409a on the shuttle bottom plate 407 through a lifting slider 409. A table 413 for carrying printed pieces is arranged on the mounting plate 412. An array of negative pressure holes is arranged on the table 413. The negative pressure holes are connected to a negative pressure device through a pipeline for adsorbing and fixing the printed pieces. A lifting drive device is arranged on the shuttle bottom plate 407. The lifting drive device is used to drive the mounting plate 412 to rise and fall. In this embodiment, the lifting drive device includes a lifting drive motor 408, a lifting drive lead screw 410 arranged at the power output end of the lifting drive motor 408, and a lifting drive nut 410a matched with the lifting drive lead screw 410. The lifting drive nut 410a is fixed to the support 411.

[0057] The shuttle bottom plates 407 of the two shuttle assemblies are slidably mounted on both sides of the marble base 402, and the mounting plate 412 is located above the marble base 402 and can move the table 413 to the vertical position below the screen. The shuttle assembly also includes a transverse driving device arranged on the marble base 402, and the transverse driving device is used to drive the shuttle bottom plates 407 to move transversely along the marble base 402.

[0058] Two upper and lower guide rails 404 are respectively arranged on two opposite side walls of the marble base 402, and the shuttle bottom plate 407 is installed on the guide rails 404 through a slider. The lateral drive device includes a second linear motor 403, and the second linear motor 403 is arranged between the two guide rails 404. The fixed part of the second linear motor 403 is fixed on the base, and the moving part is fixed to the shuttle bottom plate 407.

[0059] like Fig.14 , 15 As shown, the printed image acquisition device 5 is arranged at the upper sheet end of the screen printing machine. The printed image acquisition device 5 includes a bracket 501, a bottom plate 502 arranged on the bracket 501, two camera mounting plates 503 arranged on the bottom plate 502, and a first camera 504 and a first auxiliary light source 506 arranged on the camera mounting plate 503, and the visual axis of the first camera 504 is arranged vertically downward. A first lens 505 is installed on the first camera 504. The two camera mounting plates 503 are hoisted below the bottom plate 502, and two groups of the first camera 504, the first lens 505, and the first auxiliary light source 506 are respectively installed on the two camera mounting plates 503.

[0060] like Fig.16As shown in FIG. 1 , the screen image acquisition device 6 is disposed on the marble base 402 and is located below the screen. The marble base 402 is provided with a receiving cavity 402a, and the screen image acquisition device 6 is located in the receiving cavity 402a. Fig.12 The screen image acquisition device 6 comprises a mounting frame 601 , a second camera 601 disposed on the mounting frame 601 , and a second auxiliary light source 604 . The visual axis of the second camera 601 is vertically arranged upward, and a second lens 603 is mounted on the second camera 601 .

[0061] When the printed material to be printed is transferred to the table 413 of the shuttle transfer mechanism 4 through the film loading conveyor, the printed material image acquisition device 5 takes a photo and uploads it to determine the position of the printed material on the table 413, and the screen image acquisition device 6 takes a photo of the screen to determine the position of the screen.

[0062] The visual positioning shuttle screen printing machine of the present invention also includes a control system, which is connected to the printed part image acquisition device 5 and the screen image acquisition device 6, and is used to control the clamping adjustment mechanism 2 of the screen frame 210 to adjust the position of the screen according to the position information of the printed part to be printed in the printed part image, and to control the action of the shuttle transmission mechanism so that the screen can be aligned with the printed part.

[0063] Taking photovoltaic cell printing as an example, when the visual positioning shuttle screen printing machine of the present invention starts to run, Fig.12 As shown, the shuttle assembly 2 405 is located at the upper sheet end, and the upper sheet conveyor transfers the battery sheet to the table 413. The image acquisition device takes a picture of the position of the battery sheet on the table 413 and uploads it to the control system. Then the shuttle assembly 2 405 moves to the bottom of the printing mechanism 3, and the shuttle assembly 1 406 can move to the upper sheet end to pick up the parts, and the mounting plates 412 of the two shuttle assemblies are one up and one down, as shown in FIG. Fig.11 As shown, no interference occurs.

[0064] The screen image acquisition device 6 can take a picture of the screen, compare the screen position in the screen image with the battery cell position in the printed image, and if they are not aligned, adjust the screen position through the screen frame 210 clamping adjustment mechanism 2 to align the screen pattern with the battery cell. At this time, the printing knife 311 is at the starting position of printing, and the printing motor 305 drives the printing knife 311 to descend to a suitable position. The first linear motor 302 drives the printing head frame 304 to the printing end position, and the printing motor 305 drives the printing knife 311 to rise. The ink return motor 306 drives the ink return knife 310 to descend to a suitable position. The first linear motor 302 drives the printing head frame 304 to the printing start position, and the ink return motor 306 drives the ink return knife 310 to rise, and printing is completed.

[0065] After printing is completed, shuttle assembly 2 405 moves to the unloading position, and the battery cell is transported away by the unloading conveyor. The mounting plate 412 in shuttle assembly 2 405 drops to a low position. At this time, the mounting plate 412 of shuttle assembly 1 406 has risen to a high position to receive the battery cell and take a photo. A new round of printing starts according to the above process.

[0066] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.

Claims

1. A visual positioning shuttle screen printing machine, characterized in that: It includes a printed piece image acquisition device, a shuttle transmission mechanism, a screen image acquisition device, a screen frame clamping and adjusting mechanism, a printing mechanism and a control system; the printed piece image acquisition device is used to acquire the image of the printed piece to be printed on the shuttle transmission mechanism; the shuttle transmission mechanism is used to transport the printed piece to be printed at the upper sheet end to the bottom of the screen for printing, and is used to transport the printed piece after printing to the lower sheet end of the screen printing machine; the screen frame of the screen is set on the screen frame clamping and adjusting mechanism; the screen image acquisition device is used to acquire the screen image; the printing mechanism is used to print the printed piece; The screen frame clamping adjustment mechanism comprises two adjustment arms; the adjustment arm comprises a fixing assembly and an adjustment assembly, the fixing assembly is used to be fixed on the screen frame, and the adjustment assembly is used to move the fixing assembly; the adjustment assembly comprises a linear slide and a linear drive device used to drive the linear slide to move, the fixing assembly is rotatably mounted on the linear slide via a rotating shaft; in one of the adjustment arms, the shaft seat of the rotating shaft is connected to the fixing assembly via a compensating slide rail; When the printed piece to be printed is transferred to the table of the shuttle transfer mechanism, the printed piece image acquisition device takes a photo and uploads it to determine the position of the printed piece on the table, and the screen image acquisition device takes a photo of the screen to determine the position of the screen; The control system is connected to the printed work image acquisition device and the screen image acquisition device, and is used to control the screen frame clamping adjustment mechanism to adjust the position of the screen according to the position information of the printed work to be printed in the printed work image, and to control the action of the shuttle transmission mechanism so that the screen can be aligned with the printed work; During assembly, the sliding direction of the linear slide, i.e., the Y direction, is set perpendicular to the transmission direction of the shuttle transmission mechanism, i.e., the X direction; therefore, when the position of the screen in the Y direction needs to be adjusted, the two linear drive devices drive the two linear slides to move with the same stroke; when the angle of the screen needs to be rotated, the two linear drive devices drive the two linear slides to move with different strokes; and when there is a deviation between the screen and the printed part in the X direction, the position of the printed part in the X direction is adjusted by controlling the shuttle transmission mechanism for alignment.

2. The visual positioning shuttle screen printing machine according to claim 1, characterized in that: The linear slide is arranged on the slide rail on the adjusting arm; the linear drive device comprises an adjusting motor, an adjusting screw and an adjusting nut arranged on the adjusting screw, and the adjusting nut is connected to the linear slide via a connecting plate.

3. The visual positioning shuttle screen printing machine according to claim 1, characterized in that: The printing mechanism includes a base, a printing head frame and a printing head. The printing head frame is slidably installed on the base, and a printing drive device is provided on the base to drive the printing head frame to move; the printing head is arranged on the printing head frame, and includes a printing knife and an ink return knife. The printing knife and the ink return knife are respectively connected to a lifting device.

4. The visual positioning shuttle screen printing machine according to claim 3, characterized in that: The printing drive device includes a first linear motor, a fixed part of which is fixed on the base, and a movable part is fixed to the printing head frame; the lifting device includes a lifting motor, a lifting screw arranged at the power output end of the lifting motor, and a lifting nut matched with the lifting screw, and the lifting nut is connected to the printing knife or the ink return knife.

5. The visual positioning shuttle screen printing machine according to any one of claims 1 to 4, characterized in that: The shuttle transmission mechanism includes a base and two shuttle assemblies installed on the base, the base is long and is arranged below the printing mechanism; the shuttle assembly includes a vertically arranged shuttle bottom plate and a horizontally arranged mounting plate, one side of the mounting plate is provided with a pillar, and the pillar is slidably installed on the shuttle bottom plate; the mounting plate is provided with a table for carrying printed parts; a lifting drive device is provided on the shuttle bottom plate, and the lifting drive device is used to drive the mounting plate to rise and fall; the shuttle bottom plates of the two shuttle assemblies are respectively slidably installed on both sides of the base, and the mounting plate is located above the base and can move the table to the vertical bottom of the screen; the shuttle assembly also includes a horizontal drive device arranged on the base, and the horizontal drive device is used to drive the shuttle bottom plate to move horizontally along the base.

6. The visual positioning shuttle screen printing machine according to claim 5, characterized in that: Two upper and lower guide rails are respectively arranged on two opposite side walls of the base, and the shuttle bottom plate is installed on the guide rails through a slider; the transverse drive device includes a second linear motor; the second linear motor is arranged between the two guide rails, the fixed part of the second linear motor is fixed on the base, and the moving part is fixed to the shuttle bottom plate.

7. The visual positioning shuttle screen printing machine according to claim 5, characterized in that: The lifting drive device comprises a lifting drive motor, a lifting drive lead screw arranged at the power output end of the lifting drive motor, and a lifting drive nut matched with the lifting drive lead screw, and the lifting drive nut is fixed to the support.

8. The visual positioning shuttle screen printing machine according to claim 5, characterized in that: The screen image acquisition device is arranged on the base and below the screen.

9. The visual positioning shuttle screen printing machine according to claim 5, characterized in that: The table top is provided with an array of negative pressure holes, which are connected to a negative pressure device through pipelines.

Images