A printing head assembly structure of a screen printing machine

Abstract

The utility model relates to a kind of printing head assembly structure of silk screen printing machine, and its technical solution main points are: including: first doctor blade module, second doctor blade module, first drive module, second drive module, installation base plate, third drive module, pedestal, and control module;First drive module and second drive module are installed in parallel on installation base plate;The output end of first drive module is fixedly connected with the assembly end of first doctor blade module after passing through installation base plate;The output end of second drive module is fixedly connected with the assembly end of second doctor blade module after passing through installation base plate;Installation base plate is slidably installed on pedestal;Third drive module is installed on pedestal, and its output end is drivingly connected with installation base plate;The assembly structure is accurately adjusted by independent drive module to realize double doctor blade, and structure is simple, effectively solve the problem that existing printing head assembly structure is adjusted complicated, precision is insufficient, compact structure, convenient operation, applicable to all kinds of high-precision silk screen printing scene.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and more specifically, to a printhead assembly structure for a screen printing machine. Background Technology

[0002] As a printing equipment widely used in packaging, electronics, building materials and other fields, the rationality of the print head assembly structure of the screen printing machine directly affects the printing accuracy, production efficiency and ease of operation. In the actual production process, the print head needs to achieve uniform ink transfer through the precise movement of the squeegee to ensure the clarity and consistency of the printed pattern.

[0003] Currently, the assembly structure of screen printing machine heads on the market has many shortcomings: First, most heads use a single drive module to control multiple squeegees, causing interference between the longitudinal movements of different squeegees, making independent and precise adjustment impossible, and failing to meet the differentiated requirements of complex printing processes for different squeegee pressures and strokes; Second, the squeegee angle adjustment structure is complex, often using fixed bolts for direct locking, requiring repeated disassembly during adjustment, which is cumbersome and has low adjustment accuracy, easily leading to printing deviations; Third, the transmission mechanism for the lateral movement of the head often uses a single gear or belt drive, which lacks stability and is prone to problems such as increased transmission gaps and displacement deviations after long-term use, affecting printing repeatability; Fourth, there is a lack of an effective displacement detection mechanism, making it impossible to monitor the movement of the mounting plate in real time, making it difficult to correct deviations in time, further reducing printing quality; Fifth, the assembly structure of the squeegee and the crossbeam is mostly an integrated design, making disassembly and replacement inconvenient when the squeegee is worn or damaged, increasing maintenance costs and downtime; Therefore, a new assembly structure for the screen printing machine head is proposed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a printing head assembly structure for a screen printing machine to solve the technical problems existing in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a printhead assembly structure for a screen printing machine, comprising: a first squeegee module, a second squeegee module, a first drive module for driving the first squeegee module to move longitudinally, a second drive module for driving the second squeegee module to move longitudinally, a mounting base, a third drive module for driving the mounting base to move laterally, a base for connecting to the frame of the screen printing machine, and a control module; the first drive module and the second drive module are mounted side by side on both sides of the mounting base; the output end of the first drive module passes through the mounting base and is fixedly connected to the assembly end of the first squeegee module; the output end of the second drive module passes through the mounting base and is fixedly connected to the assembly end of the second squeegee module; the mounting base is slidably mounted on the base; the third drive module is mounted on the base, and its output end is drively connected to the mounting base; the control module is mounted on the base and is electrically connected to the first drive module, the second drive module, and the third drive module respectively.

[0006] Optionally, the first drive module includes: two first cylinders; the two first cylinders are respectively fixedly installed at both ends of one side of the mounting base plate, and their output ends pass through the mounting base plate and are respectively fixedly connected to the assembly end of the first scraper assembly; the first cylinders are electrically connected to the control module.

[0007] Optionally, the first scraper module includes: a first crossbeam, a first scraper, at least two first U-shaped grippers, at least two first locking screws corresponding one-to-one with the first U-shaped grippers, two first sector-shaped connecting pieces, and two first adjusting screws; the lower ends of the two first sector-shaped connecting pieces are respectively fixedly connected to both ends of the first crossbeam, and their middle ends are respectively rotatably connected to the output ends of the two first cylinders via pins; the upper ends of the two first sector-shaped connecting pieces are provided with first arc-shaped adjusting holes adapted to the first adjusting screws; the output ends of the two first cylinders are respectively provided with first threaded holes corresponding to the first arc-shaped adjusting holes; the first adjusting screw passes through the first arc-shaped adjusting hole and is threadedly connected to the first threaded hole; in the first adjusting screw When the rod is in the locked state, the upper end of the first sector-shaped connecting piece abuts against the output end of the first cylinder; the first U-shaped gripper is slidably engaged with the first crossbeam, and two first undercuts are arranged opposite each other on the inner side of its bottom; both first undercuts are located below the bottom of the first crossbeam; the assembly end of the first scraper is hung on the bottom of the first crossbeam through the first undercuts on the two first U-shaped grippers; the top of the first U-shaped gripper is provided with a second threaded hole adapted to the first locking screw; the first locking screw can abut against the top of the first crossbeam after passing through the second threaded hole; when the first locking screw is locked, the assembly end of the first scraper abuts against the first crossbeam and the first undercuts respectively.

[0008] Optionally, the second drive module includes: two second cylinders; the two second cylinders are respectively fixedly installed at both ends of the other side of the mounting base, and their output ends pass through the mounting base and are respectively fixedly connected to the assembly end of the second scraper assembly; the second cylinders are electrically connected to the control module.

[0009] Optionally, the second scraper module includes: a second crossbeam, a second scraper, at least two second U-shaped grippers, at least two second locking screws corresponding one-to-one with the second U-shaped grippers, two second sector-shaped connecting pieces, and two second adjusting screws; the lower ends of the two second sector-shaped connecting pieces are fixedly connected to both ends of the second crossbeam, and their middle ends are rotatably connected to the output ends of the two second cylinders respectively via pins; the upper ends of the two second sector-shaped connecting pieces are provided with second arc-shaped adjusting holes adapted to the second adjusting screws; the output ends of the two second cylinders are respectively provided with third threaded holes corresponding to the second arc-shaped adjusting holes; the second adjusting screw passes through the second arc-shaped adjusting hole and is threadedly connected to the second threaded hole; in the second adjusting screw When the rod is in the locked state, the upper end of the second sector-shaped connecting piece abuts against the output end of the second cylinder; the second U-shaped gripper can be slidably fastened to the second crossbeam, and two second undercuts are arranged opposite each other on the inner side of its bottom; both second undercuts are located below the bottom of the second crossbeam; the assembly end of the second scraper is hung on the bottom of the second crossbeam through the second undercuts on the two second U-shaped grippers; the top of the second U-shaped gripper is provided with a fourth threaded hole adapted to the second locking screw; the second locking screw can abut against the top of the second crossbeam after passing through the fourth threaded hole; when the second locking screw is locked, the assembly end of the second scraper abuts against the second crossbeam and the second undercut respectively.

[0010] Optionally, the control module includes: a display screen, a controller, and a control switch; the display screen and the control switch are mounted on one side of the base; the controller is electrically connected to the display screen, the first cylinder, the second cylinder, and the control switch respectively.

[0011] Optionally, the third drive module includes: a drive motor, two drive shafts, a first drive gear, a second drive gear, a drive chain, and a drive belt; the bottom of the base is provided with a mounting cavity; the two drive shafts are rotatably mounted in the mounting cavity; the drive belt is wound around the two drive shafts, and its lower surface is fixedly connected to the mounting base plate; the input end of any drive shaft passes through the side wall of the base and is fixedly connected to the first drive gear; the drive motor is mounted on the base, and its output end is fixedly connected to the second drive gear; the second drive gear is connected to the first drive gear through the drive chain; the drive motor is electrically connected to the controller.

[0012] Optionally, the mounting base is provided with a sensor for detecting the displacement stroke of the mounting base; the base is provided with a sensing sheet corresponding to the sensor.

[0013] This invention achieves precise adjustment of the dual scrapers through an independent drive module, improves lateral movement stability by adopting a transmission structure combining gears, chains, and belts, and ensures displacement accuracy through the cooperation of sensors and control modules. It effectively solves the problems of cumbersome adjustment and insufficient precision in existing print head assembly structures, and has the advantages of compact structure, convenient operation, and high printing quality. It is suitable for various high-precision screen printing scenarios. Attached Figure Description

[0014] Figure 1 This is an assembly drawing of this utility model; Figure 2 This is a schematic diagram showing the structural relationship between the mounting base plate and the scraper module during assembly of this utility model; Figure 3 This is a schematic diagram showing the positional relationship between the base and the third drive module in this utility model.

[0015] In the diagram: 1. Base; 2. First scraper module; 21. First crossbeam; 22. First scraper; 23. First U-shaped gripper; 24. First sector-shaped connecting piece; 25. First arc-shaped adjustment hole; 26. Second threaded hole; 3. Second scraper module; 31. Second crossbeam; 32. Second scraper; 33. Second U-shaped gripper; 34. Second sector-shaped connecting piece; 4. First drive module; 41. First cylinder; 5. Second drive module; 51. Second cylinder; 6. Mounting base plate; 7. Third drive module; 71. Drive motor; 72. Transmission shaft; 73. First transmission gear; 74. Second transmission gear; 75. Transmission belt; 8. Control module; 81. Display screen; 9. Sensor; 10. Sensing plate; 11. Mounting cavity. Detailed Implementation

[0016] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. 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. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0018] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The terms "vertical," "horizontal," "left," "right," "above," "below," and similar expressions are for illustrative purposes only and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0019] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] like Figure 1As shown, this utility model provides a printhead assembly structure for a screen printing machine, including: a first squeegee module 2, a second squeegee module 3, a first drive module 4 for driving the first squeegee module 2 to move longitudinally, a second drive module 5 for driving the second squeegee module 3 to move longitudinally, a mounting base 6, a third drive module 7 for driving the mounting base 6 to move laterally, a base 1 for connecting to the frame of the screen printing machine, and a control module 8; the first drive module 4 and the second drive module 5 are mounted side by side on both sides of the mounting base 6; the output end of the first drive module 4 passes through the... After mounting the base plate 6, it is fixedly connected to the assembly end of the first scraper module 2; the output end of the second drive module 5 passes through the mounting base 6 and is fixedly connected to the assembly end of the second scraper module 3; the mounting base 6 is slidably mounted on the base 1; the third drive module 7 is mounted on the base 1, and its output end is connected to the mounting base 6 in a transmission manner; the control module 8 is mounted on the base 1 and is electrically connected to the first drive module 4, the second drive module 5 and the third drive module 7 respectively; the overall structure is stable and easy to install, and the independent drive module realizes precise adjustment of the dual scrapers, improving production and processing efficiency.

[0021] In one embodiment, the first drive module 4 includes: two first cylinders 41; the two first cylinders 41 are respectively fixedly installed at both ends of one side of the mounting base plate 6, and their output ends pass through the mounting base plate 6 and are respectively fixedly connected to the assembly end of the first scraper 22 assembly; the first cylinders 41 are electrically connected to the control module 8.

[0022] Specifically, such as Figure 1-2 As shown, two identical first cylinders 41 are used. The two first cylinders 41 are fixed to the front and rear ends of the left side of the mounting base plate 6 by bolts. The piston rod (output end) of the cylinder passes through the preset through hole on the mounting base plate 6 and is tunably connected to the assembly end of the first scraper module 2. The first cylinder 41 is electrically connected to the control module 8 and can realize the extension and retraction of the piston rod according to the control signal, thereby driving the first scraper module 2 to rise and fall vertically.

[0023] In one embodiment, the first scraper module 2 includes: a first crossbeam 21, a first scraper 22, at least two first U-shaped grippers 23, at least two first locking screws corresponding to the first U-shaped grippers 23, two first sector-shaped connecting pieces 24, and two first adjusting screws; the lower ends of the two first sector-shaped connecting pieces 24 are fixedly connected to both ends of the first crossbeam 21, and their middle ends are rotatably connected to the output ends of the two first cylinders 41 via pins; the upper ends of the two first sector-shaped connecting pieces 24 are provided with first arc-shaped adjusting holes 25 adapted to the first adjusting screws; the output ends of the two first cylinders 41 are respectively provided with first threaded holes corresponding to the first arc-shaped adjusting holes 25; the first adjusting screw passes through the first arc-shaped adjusting hole 25 and is threadedly connected to the first threaded hole; in the first adjustment... When the screw is in the locked state, the upper end of the first sector-shaped connecting piece 24 abuts against the output end of the first cylinder 41; the first U-shaped gripper 23 is slidably engaged with the first crossbeam 21, and two first undercuts are arranged opposite each other on the inner side of its bottom; both first undercuts are located below the bottom of the first crossbeam 21; the assembly end of the first scraper 22 is hung on the bottom of the first crossbeam 21 through the first undercuts on the two first U-shaped grippers 23; the top of the first U-shaped gripper 23 is provided with a second threaded hole 26 that matches the first locking screw; the first locking screw can abut against the top of the first crossbeam 21 after passing through the second threaded hole 26; when the first locking screw is locked, the assembly end of the first scraper 22 abuts against the first crossbeam 21 and the first undercuts respectively.

[0024] Specifically, such as Figure 1-2As shown, the lower ends of the two first sector-shaped connecting pieces 24 are welded to the front and rear ends of the first crossbeam 21, and their middle parts are rotatably connected to the piston rod of the first cylinder 41 through a pin, forming a lever structure. The upper end of the sector-shaped connecting piece is provided with an arc-shaped adjustment hole, and the corresponding end of the piston rod of the first cylinder 41 is provided with a first threaded hole. The first adjusting screw passes through the arc-shaped adjustment hole and is threadedly connected to the first threaded hole. When it is necessary to adjust the angle of the first scraper 22, the first adjusting screw is loosened, the sector-shaped connecting piece is rotated to the required angle, and then the adjusting screw is tightened so that the upper end of the sector-shaped connecting piece is pressed against and fixed to the piston rod, thereby achieving precise angle locking. The first U-shaped gripper 23 can be slidably fastened to the outside of the first crossbeam 21. Two first buckles on the inner side of the bottom of the gripper extend to the bottom of the first crossbeam 21. The upper end (assembly end) of the first scraper 22 is hung on the bottom of the first crossbeam 21 by the limiting effect of the two buckles. The top of the U-shaped gripper is provided with a second threaded hole 26. The first locking screw passes through the threaded hole and abuts against the top of the first crossbeam 21. The sliding U-shaped gripper can adjust the installation position of the scraper. When the locking screw is tightened, the pressure of the screw will tightly clamp the assembly end of the scraper between the crossbeam and the buckles, ensuring the stability of the scraper installation and facilitating disassembly and replacement.

[0025] In one embodiment, the second drive module 5 includes: two second cylinders 51; the two second cylinders 51 are respectively fixedly installed at both ends of the other side of the mounting base plate 6, and their output ends pass through the mounting base plate 6 and are respectively fixedly connected to the assembly end of the second scraper 32 assembly; the second cylinders 51 are electrically connected to the control module 8; The second scraper module 3 includes: a second crossbeam 31, a second scraper 32, at least two second U-shaped grippers 33, at least two second locking screws corresponding to the second U-shaped grippers 33, two second sector-shaped connecting pieces 34, and two second adjusting screws; the lower ends of the two second sector-shaped connecting pieces 34 are fixedly connected to both ends of the second crossbeam 31, and their middle ends are rotatably connected to the output ends of the two second cylinders 51 via pins; the upper ends of the two second sector-shaped connecting pieces 34 are provided with second arc-shaped adjusting holes adapted to the second adjusting screws; the output ends of the two second cylinders 51 are respectively provided with third threaded holes corresponding to the second arc-shaped adjusting holes; the second adjusting screw passes through the second arc-shaped adjusting hole and is threadedly connected to the second threaded hole 26; at the second adjusting screw... In the locked state, the upper end of the second sector-shaped connecting piece 34 abuts against the output end of the second cylinder 51; the second U-shaped gripper 33 is slidably engaged with the second crossbeam 31, and two second undercuts are arranged opposite each other on the inner side of its bottom; both second undercuts are located below the bottom of the second crossbeam 31; the assembly end of the second scraper 32 is hung on the bottom of the second crossbeam 32 through the second undercuts on the two second U-shaped grippers 33; the top of the second U-shaped gripper 33 is provided with a fourth threaded hole adapted to the second locking screw; the second locking screw can abut against the top of the second crossbeam 31 after passing through the fourth threaded hole; when the second locking screw is locked, the assembly end of the second scraper 32 abuts against the second crossbeam 31 and the second undercut respectively.

[0026] Specifically, such as Figure 1-2 As shown, the structure, assembly method, and working principle of the second drive module 5 and the second scraper module 3 are completely consistent with those of the first drive module 4 and the first scraper module 2; the two second cylinders 51 are fixed at the front and rear ends on the right side of the mounting base plate 6, and the piston rod is rotatably connected to the middle of the second sector-shaped connecting piece 34. The angle of the second scraper 32 is adjusted by the second adjusting screw; the second scraper 32 is fixed to the bottom of the second crossbeam 31 by the first U-shaped clamp and the second locking screw, realizing independent longitudinal lifting and angle adjustment; this symmetrical design allows the two scrapers to adapt to different printing processes (such as main printing and trimming), or to realize the collaborative operation of the two scrapers, thereby improving printing efficiency.

[0027] In one embodiment, such as Figure 1-2 As shown, the control module 8 includes: a display screen 81, a controller, and a control switch; the display screen 81 and the control switch are installed on one side of the base 1; the controller is electrically connected to the display screen 81, the first cylinder 41, the second cylinder 51, and the control switch respectively.

[0028] Specifically, the system consists of a display screen 81, a controller (using a PLC controller), and a control switch. The display screen 81 and the control switch are embedded in the front panel of the base 1 for easy observation and operation by the operator. The controller is electrically connected to the display screen 81, the first cylinder 41, the second cylinder 51, the drive motor 71, and the control switch via wires. The operator can input control commands through the control switch or set parameters such as the scraper lifting stroke, lateral movement speed, and scraper angle through the display screen 81. After receiving the commands, the controller drives the actions of each actuator and feeds back the real-time working status to the display screen 81, realizing visual control.

[0029] In one embodiment, such as Figure 1-3 As shown, the third drive module 7 includes: a drive motor 71, two drive shafts 72, a first drive gear 73, a second drive gear 74, a drive chain, and a drive belt 75; the bottom of the base 1 is provided with a mounting cavity 11; the two drive shafts 72 are rotatably mounted in the mounting cavity 11 respectively; the drive belt 75 is wound around the two drive shafts 72, and its lower surface is fixedly connected to the mounting base plate 6; the input end of any drive shaft 72 passes through the side wall of the base 1 and is fixedly connected to the first drive gear 73; the drive motor 71 is mounted on the base 1, and its output end is fixedly connected to the second drive gear 74; the second drive gear 74 is connected to the first drive gear 73 through the drive chain; the drive motor 71 is electrically connected to the controller.

[0030] Specifically, the base 1 has a mounting cavity 11 at its bottom. Two drive shafts 72 are horizontally and parallelly mounted in the mounting cavity 11 via bearings. The rotation direction of the drive shafts 72 is consistent with the lateral movement direction of the mounting base 6. A drive belt 75 is wrapped around the outside of the two drive shafts 72, and the lower surface of the belt is fixedly connected to the top of the mounting base 6 by bolts. The input end of one of the drive shafts 72 passes through the side wall of the base 1 and is keyed to the first drive gear 73. The drive motor 71 is fixed to the outside of the base 1 via a motor mount, and the output shaft of the motor is keyed to the second drive gear 74. Wheel 74 is connected to the first transmission gear 73 via a transmission chain. During operation, after the control module 8 starts the drive motor 71, the motor output shaft drives the second transmission gear 74 to rotate, which in turn drives the first transmission gear 73 and the corresponding transmission shaft 72 to rotate via the transmission chain. This, in turn, drives the transmission belt 75 to rotate along the length of the base 1, ultimately achieving smooth lateral movement of the mounting base 6 and the scraper modules on both sides. This transmission structure uses a combination of gears, chains, and belts, which ensures the accuracy of transmission and reduces transmission impact through the elastic buffer of the belt, thereby improving the stability of lateral movement.

[0031] In one embodiment, the mounting base 6 is provided with a sensor 9 for detecting the displacement stroke of the mounting base 6; the base 1 is provided with a sensing sheet 10 corresponding to the sensor 9.

[0032] Specifically, such as Figure 1 As shown, a displacement sensor 9 (using an infrared sensor 9) is provided at the bottom of the mounting base 6, and a sensing plate 10 is provided at the top of the base 1 corresponding to the moving path of the sensor 9. When the mounting base 6 moves laterally, the sensor 9 collects displacement signals in real time through the position change of the sensing plate 10 and transmits the signals to the controller. The controller determines whether the target position has been reached according to the preset stroke parameters. If a deviation occurs, the operating state of the drive motor 71 is adjusted in time to ensure the accuracy of the lateral movement and avoid printing offset.

[0033] This utility model discloses a printing head assembly structure for a screen printing machine. It achieves precise adjustment of the dual squeegees through an independent drive module, improves lateral movement stability by adopting a transmission structure combining gears, chains, and belts, and ensures displacement accuracy through the cooperation of sensors and control modules. It effectively solves the problems of cumbersome adjustment and insufficient precision of existing printing head assembly structures. It has the advantages of compact structure, convenient operation, and high printing quality, and is suitable for various high-precision screen printing scenarios.

[0034] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A printhead assembly structure for a screen printing machine, characterized in that, include: The screen printing machine comprises a first squeegee module, a second squeegee module, a first drive module for driving the first squeegee module to move longitudinally, a second drive module for driving the second squeegee module to move longitudinally, a mounting base, a third drive module for driving the mounting base to move laterally, a base for connecting to the frame of the screen printing machine, and a control module. The first drive module and the second drive module are mounted side-by-side on both sides of the mounting base. The output end of the first drive module passes through the mounting base and is fixedly connected to the assembly end of the first squeegee module. The output end of the second drive module passes through the mounting base and is fixedly connected to the assembly end of the second squeegee module. The mounting base is slidably mounted on the base. The third drive module is mounted on the base, and its output end is drively connected to the mounting base. The control module is mounted on the base and is electrically connected to the first drive module, the second drive module, and the third drive module, respectively.

2. The printhead assembly structure of a screen printing machine according to claim 1, characterized in that, The first drive module includes: two first cylinders; the two first cylinders are respectively fixedly installed at both ends of one side of the mounting base plate, and their output ends pass through the mounting base plate and are respectively fixedly connected to the assembly end of the first scraper assembly; the first cylinders are electrically connected to the control module.

3. The printhead assembly structure of a screen printing machine according to claim 2, characterized in that, The first scraper module includes: a first crossbeam, a first scraper, at least two first U-shaped grippers, at least two first locking screws corresponding to the first U-shaped grippers, two first sector-shaped connecting pieces, and two first adjusting screws; the lower ends of the two first sector-shaped connecting pieces are fixedly connected to both ends of the first crossbeam, and their middle ends are rotatably connected to the output ends of the two first cylinders via pins; the upper ends of the two first sector-shaped connecting pieces are provided with first arc-shaped adjusting holes adapted to the first adjusting screws; the output ends of the two first cylinders are respectively provided with first threaded holes corresponding to the first arc-shaped adjusting holes; the first adjusting screws pass through the first arc-shaped adjusting holes and are threadedly connected to the first threaded holes; when the first adjusting screws are in the locked state, the upper ends of the first sector-shaped connecting pieces abut against the output ends of the first cylinders; The first U-shaped gripper is slidably engaged with the first crossbeam, and two first undercuts are arranged opposite each other on the inner side of its bottom; both first undercuts are located below the bottom of the first crossbeam; the assembly end of the first scraper is hung on the bottom of the first crossbeam through the engagement of the first undercuts on the two first U-shaped grippers; the top of the first U-shaped gripper is provided with a second threaded hole adapted to the first locking screw; the first locking screw can abut against the top of the first crossbeam after passing through the second threaded hole; when the first locking screw is locked, the assembly end of the first scraper abuts against the first crossbeam and the first undercuts respectively.

4. The print head assembly structure of a screen printing machine according to claim 2, characterized in that, The second drive module includes: two second cylinders; the two second cylinders are respectively fixedly installed at both ends of the other side of the mounting base plate, and their output ends pass through the mounting base plate and are respectively fixedly connected to the assembly end of the second scraper assembly; the second cylinders are electrically connected to the control module.

5. The printhead assembly structure of a screen printing machine according to claim 4, characterized in that, The second scraper module includes: a second crossbeam, a second scraper, at least two second U-shaped grippers, at least two second locking screws corresponding to the second U-shaped grippers, two second sector-shaped connecting pieces, and two second adjusting screws; the lower ends of the two second sector-shaped connecting pieces are fixedly connected to both ends of the second crossbeam, and their middle ends are rotatably connected to the output ends of the two second cylinders via pins; the upper ends of the two second sector-shaped connecting pieces are provided with second arc-shaped adjusting holes adapted to the second adjusting screws; the output ends of the two second cylinders are respectively provided with third threaded holes corresponding to the second arc-shaped adjusting holes; the second adjusting screws pass through the second arc-shaped adjusting holes and are threadedly connected to the second threaded holes; when the second adjusting screws are in the locked state, the upper ends of the second sector-shaped connecting pieces abut against the output ends of the second cylinders; The second U-shaped gripper is slidably engaged with the second crossbeam, and two second undercuts are arranged opposite each other on the inner side of its bottom; both second undercuts are located below the bottom of the second crossbeam; the assembly end of the second scraper is hung on the bottom of the second crossbeam through the engagement of the second undercuts on the two second U-shaped grippers; the top of the second U-shaped gripper is provided with a fourth threaded hole adapted to the second locking screw; the second locking screw can abut against the top of the second crossbeam after passing through the fourth threaded hole; when the second locking screw is locked, the assembly end of the second scraper abuts against the second crossbeam and the second undercut respectively.

6. The printhead assembly structure of a screen printing machine according to claim 5, characterized in that, The control module includes: a display screen, a controller, and a control switch; the display screen and the control switch are installed on one side of the base; the controller is electrically connected to the display screen, the first cylinder, the second cylinder, and the control switch respectively.

7. The printhead assembly structure of a screen printing machine according to claim 6, characterized in that, The third drive module includes: a drive motor, two drive shafts, a first drive gear, a second drive gear, a drive chain, and a drive belt; the bottom of the base is provided with a mounting cavity; the two drive shafts are rotatably mounted in the mounting cavity; the drive belt is wound around the two drive shafts, and its lower surface is fixedly connected to the mounting base; the input end of any drive shaft passes through the side wall of the base and is fixedly connected to the first drive gear; the drive motor is mounted on the base, and its output end is fixedly connected to the second drive gear; the second drive gear is connected to the first drive gear through the drive chain; the drive motor is electrically connected to the controller.

8. The print head assembly structure of a screen printing machine according to claim 1, characterized in that, The mounting base is provided with a sensor for detecting the displacement stroke of the mounting base; the base is provided with a sensing sheet corresponding to the sensor.

Images