A screen printing machine that can automatically adjust the thickness of the squeegee ink.

Abstract

This utility model discloses a screen printing machine capable of automatically adjusting the thickness of the squeegee ink, including a frame and a printing head. The frame is equipped with a first moving mechanism. The printing head includes a box-shaped mounting beam, a squeegee lifting assembly, a return ink lifting assembly, a squeegee blade, and a return ink blade. The box-shaped mounting beam is mounted on the first moving mechanism. The squeegee lifting assembly includes a squeegee drive device and a first guide rod. The return ink lifting assembly includes a return ink drive device and a second guide rod. The squeegee drive device and the return ink drive device are mounted on the upper surface of the box-shaped mounting beam. The first guide rod is inserted into the box-shaped mounting beam and is driveably connected to the squeegee drive device. The second guide rod is inserted into the box-shaped mounting beam and is driveably connected to the return ink drive device. The squeegee blade is connected to the lower end of the first guide rod, and the return ink blade is connected to the lower end of the second guide rod. The screen printing machine provided by this utility model can improve the accuracy and stability of the squeegee lifting adjustment.

Description

Technical Field

[0001] This utility model relates to the field of screen printing machine technology, and in particular to a screen printing machine that can automatically adjust the thickness of the squeegee ink. Background Technology

[0002] Some existing screen printing machines, such as the one disclosed in Chinese patent CN217319732U, use a motor-screw type lifting assembly to adjust the thickness of the squeegee or return blade. In this model, the squeegee lifting assembly and the return blade lifting assembly are arranged on both sides of a crossbeam, with a horizontal fixing plate mounted above the crossbeam to hold the motor, guide shaft, and other components of the squeegee or return blade lifting assembly. While this type of screen printing machine can automatically adjust the ink thickness, the squeegee and return blade lifting assemblies are suspended relative to the crossbeam, resulting in unstable installation and hindering the precision and stability of squeegee adjustment. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a screen printing machine capable of automatically adjusting the thickness of the squeegee ink, which can automatically adjust the thickness of the squeegee ink and ensure the stable installation of the squeegee lifting assembly and the ink return lifting assembly, thereby improving the accuracy and stability of the squeegee lifting adjustment.

[0004] A screen printing machine with automatically adjustable ink thickness according to a first aspect embodiment of the present invention includes a frame and a printing head. The frame is provided with a first moving mechanism. The printing head includes a box-shaped mounting beam, an ink scraper lifting assembly, an ink return lifting assembly, an ink scraper blade, and an ink return blade. The box-shaped mounting beam is mounted on the first moving mechanism. The ink scraper lifting assembly includes an ink scraper driving device and a first guide rod. The ink return lifting assembly includes an ink return driving device and a second guide rod. The ink scraper driving device and the ink return driving device are mounted on the upper surface of the box-shaped mounting beam. The ink scraper driving device and the ink return driving device are positioned along the width of the box-shaped mounting beam. Arranged in a 1 / 2-degree direction, the first guide rod is inserted into the box-shaped mounting beam and is connected to the ink scraping drive device. The second guide rod is inserted into the box-shaped mounting beam and is connected to the ink return drive device. The ink scraper and the ink return blade are located below the box-shaped mounting beam. The ink scraper is connected to the lower end of the first guide rod, and the ink return blade is connected to the lower end of the second guide rod. The first moving mechanism can drive the print head to move horizontally and rise and fall. The ink scraping drive device can drive the first guide rod to drive the ink scraper to rise and fall, and the ink return drive device can drive the second guide rod to drive the ink return blade to rise and fall.

[0005] According to some embodiments of the present invention, the ink scraping drive device includes a servo motor and a lead screw transmission structure. The servo motor is fixedly installed on the box-shaped mounting beam and connected to the first guide rod through the lead screw transmission structure.

[0006] According to some embodiments of the present invention, the output shaft of the servo motor is arranged in a vertical direction, and the servo motor is located on the upper side of the lead screw transmission structure.

[0007] According to some embodiments of the present invention, there are two ink scraping drive devices and at least four first guide rods, wherein each servo motor is connected to at least two of the first guide rods through the lead screw transmission structure.

[0008] According to some embodiments of the present invention, the ink return drive device includes an ink return cylinder, which is fixedly installed on the box-shaped mounting beam, and the output rod of the ink return cylinder is vertically arranged and connected to the second guide rod.

[0009] According to some embodiments of this utility model, an oil-proof protective cover is installed on the upper end of the box-shaped mounting beam, and the ink scraping drive device and the ink return drive device are located inside the oil-proof protective cover.

[0010] According to some embodiments of this utility model, the upper end of the oil leak-proof cover is open.

[0011] According to some embodiments of the present invention, the box-shaped mounting beam includes an upper side plate, a left side plate, a lower side plate, and a right side plate connected in sequence. The ink scraping drive device and the ink return drive device are installed on the upper surface of the upper side plate, and the first guide rod and the second guide rod pass through the lower side plate and the upper side plate.

[0012] According to some embodiments of the present invention, the screen printing machine further includes a printing table and a camera for taking pictures and positioning. The frame is provided with a second moving mechanism and a position adjustment mechanism. The printing table is installed on the position adjustment mechanism and located below the printing head. The camera is installed on the second moving mechanism. The second moving mechanism can drive the camera to move horizontally closer to or away from the center of the printing table. The position adjustment mechanism can horizontally adjust the position of the printing table.

[0013] According to some embodiments of the present invention, an off-net mechanism is installed on the first moving mechanism, and an annular mesh frame is installed on the off-net mechanism. The mesh frame is horizontally arranged, and clamping devices for clamping the mesh plate are installed at opposite ends of the mesh frame. The off-net mechanism can drive the mesh frame to rise and fall.

[0014] The screen printing machine with automatically adjustable ink thickness according to the embodiments of the present invention has at least the following beneficial effects:

[0015] 1. By adopting a box-shaped mounting beam, the ink-scraping drive device of the ink-returning lifting assembly and the ink-returning lifting assembly can be directly installed on the upper surface of the box-shaped mounting beam. The first guide rod of the ink-scraping lifting assembly and the second guide rod of the ink-returning lifting assembly can be directly inserted into the box-shaped mounting beam. Thus, it is not necessary to install the ink-scraping lifting assembly and the ink-returning lifting assembly on the box-shaped mounting beam in a suspended beam manner through a fixing plate. This is convenient for installation and can make the ink-scraping lifting assembly and the ink-returning lifting assembly securely installed, thereby improving the accuracy and stability of the ink-scraping blade lifting adjustment.

[0016] 2. The doctor blade lifting assembly uses a servo motor and lead screw drive to drive the doctor blade lifting, which can more accurately control the lifting height and pressing force of the doctor blade, making the doctor blade adjustment more uniform and the control of the printing ink thickness more precise.

[0017] 3. An oil leak-proof cover can be easily installed on the upper end of the box-shaped mounting beam. The oil leak-proof cover can prevent lubricating oil from falling onto the workpiece and protect the workpiece.

[0018] 4. Since the requirements for the height adjustment of the ink return blade are not high, the ink return drive device can use a cylinder for height adjustment to save costs.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of a screen printing machine with automatically adjustable ink thickness according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 A schematic diagram of the print head of a screen printing machine that can automatically adjust the thickness of the squeegee ink is shown.

[0023] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 4 for Figure 1 A schematic diagram of the second moving mechanism of a screen printing machine that can automatically adjust the thickness of the squeegee ink is shown.

[0025] Figure label:

[0026] The components include: frame 100, print head 200, box-shaped mounting beam 210, upper side plate 211, left side plate 212, lower side plate 213, right side plate 214, oil leak-proof cover 220, doctor blade lifting assembly 230, doctor blade drive device 231, first guide rod 232, ink return lifting assembly 240, ink return drive device 241, second guide rod 242, doctor blade 250, ink return blade 260, first moving mechanism 300, printing table 410, position adjustment mechanism 420, second moving mechanism 500, screen frame 610, screen removal mechanism 620, and clamping device 630. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] Reference Figures 1 to 3According to a first aspect of the present invention, a screen printing machine capable of automatically adjusting the thickness of the squeegee ink includes a frame 100 and a printing head 200. The frame 100 is provided with a first moving mechanism 300. The printing head 200 includes a box-shaped mounting beam 210, a squeegee lifting assembly 230, a return ink lifting assembly 240, a squeegee blade 250, and a return ink blade 260. The box-shaped mounting beam 210 is mounted on the first moving mechanism 300. The squeegee lifting assembly 230 includes a squeegee driving device 231 and a first guide rod 232. The return ink lifting assembly 240 includes a return ink driving device 241 and a second guide rod 242. The squeegee driving device 231 and the return ink driving device 241 are mounted on the upper surface of the box-shaped mounting beam 210. 41 is arranged along the width direction of the box-shaped mounting beam 210. The first guide rod 232 is inserted into the box-shaped mounting beam 210 and is connected to the ink scraper drive device 231. The second guide rod 242 is inserted into the box-shaped mounting beam 210 and is connected to the ink return drive device 241. The ink scraper 250 and the ink return blade 260 are located below the box-shaped mounting beam 210. The ink scraper 250 is connected to the lower end of the first guide rod 232, and the ink return blade 260 is connected to the lower end of the second guide rod 242. The first moving mechanism 300 can drive the print head 200 to move horizontally and rise and fall. The ink scraper drive device 231 can drive the first guide rod 232 to drive the ink scraper 250 to rise and fall. The ink return drive device 241 can drive the second guide rod 242 to drive the ink return blade 260 to rise and fall.

[0032] By using a box-shaped mounting beam 210, the ink scraping drive device 231 of the ink scraping lifting assembly 230 and the ink return drive device 241 of the ink return lifting assembly 240 can be directly mounted on the upper surface of the box-shaped mounting beam 210. The first guide rod 232 of the ink scraping lifting assembly 230 and the second guide rod 242 of the ink return lifting assembly 240 can be directly inserted into the box-shaped mounting beam 210. Thus, it is not necessary to install the ink scraping lifting assembly 230 and the ink return lifting assembly 240 on the box-shaped mounting beam 210 by means of a fixed plate and a suspended beam. This is convenient for installation and can make the ink scraping lifting assembly 230 and the ink return lifting assembly 240 installed firmly, thereby improving the accuracy and stability of the lifting adjustment of the ink scraper 250.

[0033] According to some embodiments of this utility model, the doctor blade drive device 231 includes a servo motor and a lead screw transmission structure. The servo motor is fixedly installed on the box-shaped mounting beam 210 and connected to the first guide rod 232 through the lead screw transmission structure. The doctor blade lifting assembly 230 uses a servo motor + lead screw transmission to drive the doctor blade 250 to lift and lower, which can more accurately control the lifting height and pressing force of the doctor blade 250, making the doctor blade adjustment more uniform and the control of the printing ink thickness more precise.

[0034] Reference Figure 2 and Figure 3 According to some embodiments of this utility model, the output shaft of the servo motor is arranged vertically, and the servo motor is located on the upper side of the lead screw drive structure. With this layout, the installation of the servo motor, lead screw drive structure, etc., is relatively convenient.

[0035] Reference Figure 2 and Figure 3 According to some embodiments of this utility model, two doctor blade drive devices 231 are provided, and at least four first guide rods 232 are provided. Each servo motor is connected to at least two first guide rods 232 through a lead screw transmission structure. By adopting a dual doctor blade drive device 231 and a multi-first guide rod 232 structure, the lifting stability of the doctor blade 250 can be further improved.

[0036] Reference Figure 2 and Figure 3 According to some embodiments of the present invention, the ink return drive device 241 includes an ink return cylinder, which is fixedly installed on the box-shaped mounting beam 210. The output rod of the ink return cylinder is vertically arranged and connected to the second guide rod 242.

[0037] Reference Figure 2 and Figure 3 According to some embodiments of this utility model, an oil leak-proof cover 220 is installed on the upper end of the box-shaped mounting beam 210, and the ink scraper drive device 231 and the ink return drive device 241 are located inside the oil leak-proof cover 220. The oil leak-proof cover 220 can be easily installed on the upper end of the box-shaped mounting beam 210, and the oil leak-proof cover 220 can prevent lubricating oil from falling onto the workpiece, thus protecting the workpiece.

[0038] Reference Figure 2 and Figure 3 According to some embodiments of the present invention, the upper end of the oil-proof cover 220 is open so that the ink scraping drive device 231 and the ink return drive device 241 can dissipate heat from the upper end of the oil-proof cover 220.

[0039] Reference Figure 2 and Figure 3 According to some embodiments of this utility model, the box-shaped mounting beam 210 includes an upper side plate 211, a left side plate 212, a lower side plate 213, and a right side plate 214 connected in sequence. A scraper drive device 231 and a return ink drive device 241 are mounted on the upper surface of the upper side plate 211. A first guide rod 232 and a second guide rod 242 pass through the lower side plate 213 and the upper side plate 211. With this configuration, the box-shaped mounting beam 210 is hollow inside, ensuring a large external dimension while reducing material consumption, lowering weight, and controlling costs.

[0040] Reference Figure 1 and Figure 4 According to some embodiments of this utility model, the screen printing machine further includes a printing table 410, a camera (not shown in the drawings) for image positioning, and a frame 100 equipped with a second moving mechanism 500 and a position adjustment mechanism 420. The printing table 410 is mounted on the position adjustment mechanism 420 and located below the printing head 200. The camera is mounted on the second moving mechanism 500. The second moving mechanism 500 can drive the camera to move horizontally closer to or away from the center of the printing table 410, and the position adjustment mechanism 420 can horizontally adjust the position of the printing table 410. In specific implementation, the camera can be moved to the upper side of the center of the printing table 410 through the second moving mechanism 500, and then the position adjustment mechanism 420 finely adjusts the position of the printing table 410 so that the camera can find the target point of the workpiece on the printing table 410, thereby correcting the workpiece position. After finding the target point, the camera moves out of the printing table 410. Through the above settings, the center target point of the workpiece can be found, and the accuracy of the camera in finding the target point of the workpiece is ensured, thus ensuring the printing accuracy.

[0041] According to some embodiments of the present invention, a screen-off mechanism 620 is installed on the first moving mechanism 300, and a ring-shaped screen frame 610 is installed on the screen-off mechanism 620. The screen frame 610 is horizontally arranged, and the printing head 200 passes through the screen frame 610. Clamping devices 630 for clamping the screen are installed at opposite ends of the screen frame 610. The screen-off mechanism can drive the screen frame 610 to rise and fall.

[0042] In the actual operation, the screen frame clamps the screen plate via the clamping device 630. After the camera finds the target point and moves out of the printing table 410, the first moving mechanism 300 simultaneously drives the screen removal mechanism 620 and the printing head 200 to descend. Then, the screen removal mechanism 620 drives the screen frame 610 to lower the screen plate onto the workpiece on the printing table 410. Next, the printing head 200 performs printing operations on the workpiece through the screen plate. Because the printing head 200 uses a dual servo motor lifting and adjusting ink scraping function, it can automatically adjust the ink thickness, and the ink scraping is more uniform and the thickness control is more precise. After printing is completed, the screen removal mechanism 620 drives the screen plate to slowly rise, achieving automatic screen removal. Finally, the first moving mechanism 300 drives the screen plate, screen frame 610, screen removal mechanism 620, and printing head 200 to rise again to continue printing the next workpiece.

[0043] Reference Figure 3 and Figure 4 In the specific implementation process, the first moving mechanism 300 and the second moving mechanism 500 can both be formed by combining at least two linear moving devices. The linear moving device can be in the form of a motor + lead screw + slider, or it can be in the form of a belt conveyor driving the slider to move, or other settings can be adopted, which are not limited here.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A screen printing machine capable of automatically adjusting the thickness of the squeegee ink, characterized in that, include: A frame (100) is provided with a first moving mechanism (300); A printhead (200) includes a box-shaped mounting beam (210), a doctor blade lifting assembly (230), a return ink lifting assembly (240), a doctor blade (250), and a return ink blade (260). The box-shaped mounting beam (210) is mounted on the first moving mechanism (300). The doctor blade lifting assembly (230) includes a doctor blade drive device (231) and a first guide rod (232). The return ink lifting assembly (240) includes a return ink drive device (241) and a second guide rod (242). The doctor blade drive device (231) and the return ink drive device (241) are mounted on the upper surface of the box-shaped mounting beam (210). The doctor blade drive device (231) and the return ink drive device (241) are arranged along the width direction of the box-shaped mounting beam (210). The first guide rod (232) is inserted into the box-shaped mounting beam (210). 0) and is driven by the doctor blade drive device (231). The second guide rod (242) is inserted into the box-shaped mounting beam (210) and is driven by the doctor blade drive device (241). The doctor blade (250) and the doctor blade (260) are located below the box-shaped mounting beam (210). The doctor blade (250) is connected to the lower end of the first guide rod (232), and the doctor blade (260) is connected to the lower end of the second guide rod (242). The first moving mechanism (300) can drive the print head (200) to move horizontally and rise and fall. The doctor blade drive device (231) can drive the first guide rod (232) to drive the doctor blade (250) to rise and fall. The doctor blade drive device (241) can drive the second guide rod (242) to drive the doctor blade (260) to rise and fall.

2. The screen printing machine with automatically adjustable ink thickness according to claim 1, characterized in that, The ink scraping drive device (231) includes a servo motor and a lead screw transmission structure. The servo motor is fixedly installed on the box-shaped mounting beam (210) and connected to the first guide rod (232) through the lead screw transmission structure.

3. A screen printing machine with automatically adjustable ink thickness according to claim 2, characterized in that, The output shaft of the servo motor is arranged in a vertical direction, and the servo motor is located on the upper side of the lead screw transmission structure.

4. A screen printing machine with automatically adjustable ink thickness according to claim 2, characterized in that, Two of the ink scraping drive devices (231) are provided, and at least four of the first guide rods (232) are provided, wherein each of the servo motors is connected to at least two of the first guide rods (232) through the lead screw transmission structure.

5. A screen printing machine with automatically adjustable ink thickness according to claim 1, characterized in that, The ink return drive device (241) includes an ink return cylinder, which is fixedly installed on the box-shaped mounting beam (210). The output rod of the ink return cylinder is vertically arranged and connected to the second guide rod (242).

6. A screen printing machine with automatically adjustable ink thickness according to claim 2, characterized in that, An oil-proof cover (220) is installed on the upper end of the box-shaped mounting beam (210), and the ink scraper drive device (231) and the ink return drive device (241) are located inside the oil-proof cover (220).

7. A screen printing machine with automatically adjustable ink thickness according to claim 6, characterized in that, The upper end of the oil leak-proof cover (220) is open.

8. A screen printing machine with automatically adjustable ink thickness according to claim 1, characterized in that, The box-shaped mounting beam (210) includes an upper side plate (211), a left side plate (212), a lower side plate (213), and a right side plate (214) connected in sequence. The ink scraping drive device (231) and the ink return drive device (241) are mounted on the upper surface of the upper side plate (211). The first guide rod (232) and the second guide rod (242) pass through the lower side plate (213) and the upper side plate (211).

9. A screen printing machine with automatically adjustable ink thickness according to claim 1, characterized in that, It also includes a printing table (410) and a camera for taking pictures and positioning. The frame (100) is provided with a second moving mechanism (500) and a position adjustment mechanism (420). The printing table (410) is installed on the position adjustment mechanism (420) and located below the printing head (200). The camera is installed on the second moving mechanism (500). The second moving mechanism (500) can drive the camera to move horizontally closer to or away from the center of the printing table (410). The position adjustment mechanism (420) can adjust the position of the printing table (410) horizontally.

10. A screen printing machine with automatically adjustable ink thickness according to claim 9, characterized in that, The first moving mechanism (300) is equipped with an off-grid mechanism (620), and the off-grid mechanism (620) is equipped with a ring-shaped mesh frame (610). The mesh frame (610) is horizontally arranged, and clamping devices (630) for clamping the mesh plate are installed at opposite ends of the mesh frame (610). The off-grid mechanism can drive the mesh frame (610) to rise and fall.

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