A full-automatic silk screen printing machine

Abstract

The application discloses a full-automatic silk screen printing machine, which comprises a rotating disc, a material taking and placing arm, a code scanning rotating mechanism, a CCD detection mechanism, a silk screen printing mechanism, a cleaning mechanism and a material throwing platform, wherein the rotating disc is horizontally rotatably arranged on a machine table, and the periphery of the rotating disc is provided with a material feeding and discharging station, a first detection station, a silk screen printing station, a second detection station and a material throwing station; the material taking and placing arm and the code scanning rotating mechanism are respectively arranged at the two sides of the material feeding and discharging station; the CCD detection mechanism comprises two groups and is respectively arranged at the first detection station and the second detection station; the silk screen printing mechanism is arranged at the silk screen printing station, and the cleaning mechanism is arranged outside the silk screen printing mechanism; and the material throwing platform is arranged at the material throwing station. The full-automatic silk screen printing machine adopts a rotating disc type transmission mode and automatically realizes material taking and placing, code scanning and rotating, surface detection, height self-adaptive silk screen printing, defective product detection, screen plate automatic cleaning and automatic material throwing.

Description

Technical Field

[0001] The present invention relates to the field of screen manufacturing, in particular to a fully automatic screen printing machine for automatic screen loading. Background Art

[0002] Screen is a common optical component, which is widely used in various electronic products, such as common smart phones, smart watches, tablets, computer monitors, TV screens, etc. As the market demand for the above electronic products continues to increase, the global screen manufacturing market is also expanding rapidly. At present, China is an important screen manufacturing base.

[0003] Screen production and assembly are currently facing the problem of industrial automation integration transformation that needs to be solved. Replacing traditional manual production with automated production lines is the future development trend. In the screen manufacturing process, surface processing is an important process, such as screen surface silk screen printing, etc., to achieve the desired pattern printed on the screen surface. When performing the above screen silk screen processing technology, the following technical problems need to be solved: 1. The current silk screen printing equipment generally adopts a stand-alone mode, which cannot be processed in batches. The production capacity and efficiency are low, and it cannot adapt to the current integration requirements of the automated production line. In the design process of the silk screen automated production line, it is necessary to solve the problem of automatic loading of the screen and automatic silk screen printing; 2. In the integrated design process of the silk screen automated production line, since each screen has a QR code, in order to achieve production traceability, the screen code scanning problem must be solved before silk screen printing; 3. In addition, since the screen silk screen printing process includes actions such as loading and unloading, code scanning, CCD detection, silk screen printing, and defective product screening, it is necessary to design a screen transmission method to solve the problem of the screen completing the above process actions during the automatic transmission process; 4. During the automatic transmission of the screen, the problem of automatic silk screen printing on the screen surface needs to be solved. At the same time, in the actual production process, due to the different thicknesses of different screens, it is necessary to solve the problem of real-time height adjustment between the silk screen printing platform and the silk screen printing head; 5. During the silk screen printing process, after the ink is scraped by the silk screen printing head once, the thickness uniformity often varies. Therefore, the problem of ink return during the silk screen printing process also needs to be solved; 6. During the silk screen printing process, solidified ink will accumulate on the silk screen printing screen that has been used for a long time. The accumulated ink will affect the quality of the next silk screen printing. Therefore, it is necessary to solve the problem of automatic cleaning of residual ink on the screen during the silk screen printing process; 7. The defective products generated during the silk screen printing process need to be stored centrally. Therefore, in the process of automated silk screen integrated design, the problem of automatic throwing of defective products also needs to be solved. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned existing technologies and provide a fully automatic silk screen printing machine that adopts a turntable transmission method to automatically realize material loading and unloading, rotary scanning, surface detection, highly adaptive silk screen printing, defective product detection, automatic screen cleaning and automatic material throwing.

[0005] The technical solution adopted by the present invention is as follows: a fully automatic screen printing machine, including a turntable, a material picking and placing arm, a code scanning and rotating mechanism, a CCD detection mechanism, a screen printing mechanism, a cleaning mechanism and a throwing platform, wherein the turntable is horizontally rotatably arranged on the machine platform, and the circumference of the turntable is provided with a loading and unloading station, a first detection station, a screen printing station, a second detection station and a throwing station; the material picking and placing arm and the code scanning and rotating mechanism are respectively arranged at intervals on both sides of the loading and unloading station; the CCD detection mechanism includes two groups, which are respectively arranged at the first detection station and the second detection station; the screen printing mechanism is arranged at the screen printing station, and the cleaning mechanism is arranged on the outside of the screen printing mechanism; the throwing platform is arranged at the throwing station.

[0006] Preferably, the material picking and unloading arm includes a material picking and unloading support, a first drive motor, a connecting rocker arm, a second drive motor, a material picking shaft and a material picking rack, wherein the above-mentioned material picking and unloading support is horizontally arranged on the machine platform; the above-mentioned first drive motor is arranged on the material picking support; one end of the above-mentioned connecting rocker arm is connected to the output shaft of the first drive motor and extends horizontally; the above-mentioned second drive motor is arranged on the upper part of the other end of the connecting rocker arm; the above-mentioned material picking shaft is rotatably arranged in the second drive motor and connected to the output shaft of the second drive motor; the above-mentioned material picking rack is a U-shaped frame structure, a material picking trough is provided on its side, and a vacuum suction hole is provided on the support block at the bottom of the material picking trough to adsorb and fix the screen in the material picking trough; the material picking rack takes out the screen from the material transmission mechanism and places it on the correction platform set at the material picking and unloading station, and after the correction platform corrects the position of the screen, the screen is placed on the turntable.

[0007] Preferably, the code scanning rotation mechanism includes a code scanning support, a code scanning rotation motor, a code scanning rotation support plate and a material suction seat, wherein the above-mentioned code scanning support is vertically arranged on the machine platform, and the upper part of the code scanning support extends horizontally to above the material picking and unloading station; the above-mentioned code scanning rotation motor is vertically arranged at the upper horizontal extension part of the code scanning support, and the output end is arranged downward; the above-mentioned code scanning rotation support plate is horizontally connected to the output end of the code scanning rotation motor, and the code scanning rotation motor drives the code scanning rotation support plate to rotate; the above-mentioned material suction seat includes two pieces, the material suction seat is horizontally connected to the end of the code scanning rotation support plate, and the material suction seat is provided with vacuum suction holes to adsorb the screen.

[0008] Preferably, the CCD detection mechanism includes a detection bracket, a CCD lens, a dust removal tube and a dust removal flat nozzle, wherein the above-mentioned detection bracket is arranged at the first detection station and the second detection station; the above-mentioned CCD lens includes at least two, the CCD lens is vertically arranged on the detection bracket, and the lens direction is set downward; the upper end of the above-mentioned dust removal tube is connected to the top of the detection bracket and extends downward to the bottom of the CCD lens; the above-mentioned dust removal flat nozzle is connected to the lower end of the dust removal tube, and the nozzle is set toward the first detection station or the second detection station.

[0009] Preferably, the silk screen printing mechanism includes a silk screen printing drive component, a silk screen printing head, a silk screen printing platform and a silk screen printing lifting component, wherein the silk screen printing drive component is arranged on the machine platform and is located above the turntable; the silk screen printing head is connected to the output end of the silk screen printing drive component and is driven by the silk screen printing drive component to move horizontally in a straight line; the silk screen printing platform is horizontally connected to the silk screen printing drive component and is located between the silk screen printing component and the turntable, and the silk screen printing component moves in the silk screen printing platform to print ink on the screen on the turntable; the silk screen printing lifting component is arranged below the turntable, and the output end is arranged upward and connected to the silk screen printing platform to drive the silk screen printing platform to move up and down.

[0010] Preferably, the screen printing drive assembly includes a screen printing bracket, a screen printing drive motor and a screen printing drive belt; a transmission space is provided inside the screen printing bracket; the screen printing drive belt is arranged in the transmission space; the screen printing drive motor is arranged on the rear side wall of the screen printing bracket, and the output shaft passes through the side wall of the screen printing bracket and is connected to the screen printing drive belt, and drives the screen printing drive belt to move; the screen printing head is slidably connected to the screen printing bracket in the horizontal direction, and is connected to the screen printing drive belt, and the screen printing drive belt drives the screen printing head to move horizontally in a straight line.

[0011] Preferably, the silk screen printing platform includes a connecting seat, a silk screen screen, a platform cylinder, and a platform locking nut, wherein the above-mentioned connecting seat includes two, the two connecting seats are respectively connected to the two horizontally extending support plates at the bottom of the silk screen bracket, and the inner side wall of the connecting seat is provided with a mounting groove; the above-mentioned silk screen screen is horizontally arranged in the mounting grooves of the two connecting seats, and the silk screen screen is provided with a silk screen groove; the above-mentioned platform cylinder includes two, the platform cylinder is vertically arranged on the connecting seat, and the output end extends vertically downward into the mounting groove and is connected to the silk screen screen; the above-mentioned platform locking nut includes at least two, the platform locking nut is vertically arranged on the connecting seat, and is connected to the silk screen screen so as to lock and fix the silk screen screen.

[0012] Preferably, the screen printing head includes a screen printing seat, a screen printing lifting cylinder, a screen printing lifting seat, an ink scraping component and an ink returning component, wherein the screen printing seat is vertically and movably connected to the screen printing bracket and is connected to the screen printing drive belt; the screen printing lifting cylinder is vertically arranged on the side wall of the screen printing seat; the screen printing lifting seat includes two, and the two screen printing lifting seats are slidably connected to the side wall of the screen printing seat in the vertical direction and are connected to the output end of the screen printing lifting cylinder; the ink scraping component and the ink returning component are respectively arranged on the two screen printing lifting seats.

[0013] Preferably, the ink scraping component includes an ink scraping connecting plate, an ink scraping support and an ink scraping plate, wherein the upper end of the above-mentioned ink scraping connecting plate is connected to the screen printing lifting seat; the above-mentioned ink scraping support is arranged below the ink scraping connecting plate, and the ink scraping support is provided with two ink scraping supporting ears, and the two ink scraping supporting ears are arranged at intervals; the lower end of the above-mentioned ink scraping connecting plate is rotatably connected to the two ink scraping supporting ears; the lower part of the above-mentioned ink scraping support is provided with an ink scraping mounting groove; the above-mentioned ink scraping plate is arranged in the ink scraping mounting groove and extends downward to the bottom of the ink scraping mounting groove.

[0014] Preferably, the ink return component includes an ink return connecting plate, an ink return support and an ink return plate, wherein the upper end of the ink return connecting plate is connected to the silk screen lifting seat; the ink return support is arranged below the ink return connecting plate, and the ink return support is provided with two ink return support ears, which are arranged at intervals; the lower end of the ink return connecting plate is rotatably connected to the two ink return support ears; the ink return plate is connected to the bottom of the ink return support and extends downward to the side of the ink scraper plate.

[0015] Preferably, the cleaning mechanism includes a cleaning support, a cleaning drive assembly, a cleaning rotating assembly and a cleaning assembly, wherein the cleaning support is arranged on the machine table in a straight line direction; the cleaning drive assembly is arranged on the cleaning support; the cleaning rotating assembly is connected to the output end of the cleaning drive assembly; the cleaning assembly is arranged on the output of the cleaning rotating assembly; after the cleaning assembly is driven to one side of the silk screen printing screen by the cleaning drive assembly, it is driven to rotate to a horizontal direction by the cleaning rotating assembly and is located below the silk screen printing screen, and the bottom surface of the silk screen printing screen is cleaned by the cleaning roller.

[0016] The beneficial effects of the present invention are:

[0017] In view of the defects and shortcomings of the existing technology, the present invention independently developed and designed a fully automatic silk screen printing machine that adopts a turntable transmission method to automatically realize material loading and unloading, rotary scanning, surface detection, highly adaptive silk screen printing, defective product detection, automatic screen cleaning and automatic material throwing.

[0018] The present invention uses a turntable rotatably arranged on the machine as an automatic transport carrier during the screen silk-screen printing process. The turntable is provided with loading and unloading stations, a first inspection station, a silk-screen printing station, a second inspection station and a throwing station at intervals. Material picking and placing arms and a code scanning rotation mechanism are provided on both sides of the loading and unloading stations. The first inspection station and the second inspection station are respectively provided with a CCD detection mechanism; the silk-screen printing station is provided with a silk-screen mechanism and a cleaning mechanism, and the throwing station is provided with a throwing platform; the material picking and placing arm takes out the screen lifted up by the material transmission mechanism and moves it to the correction platform provided under the loading and unloading stations. After the correction platform passes through the turntable to correct the position of the screen, the screen is placed on the material tray. The code scanning rotation mechanism takes out the screen and rotates it 180° to the machine code scanning gun. After the code scanning gun completes the code scanning action, the code scanning rotation mechanism rotates the screen another 180° and puts it back on the turntable. After the code scanning is completed, the screen is rotated and moved to the first inspection station by the turntable. After inspection by the CCD mechanism, it is moved to the silk-screen printing station. After the silk-screen printing platform of the silk-screen printing mechanism approaches the screen on the turntable from above, the silk-screen printing mechanism scrapes the ink on the silk-screen printing platform back and forth and prints it on the screen surface; after silk-screen printing is completed, the screen moves to the second inspection station and is inspected by the CCD mechanism. The defective products detected are moved to the throwing platform by the pick-up and discharge arm at the throwing station. After the material is thrown by the throwing platform, the screen of good products after silk-screen printing is rotated back to the loading and unloading station through the screen, and is moved again by the pick-up and discharge arm and placed in the material tray on the material transmission mechanism.

[0019] The screen printing mechanism of the present invention comprises a screen printing drive assembly, a screen printing head, a screen printing platform and a screen printing lifting assembly, wherein the screen printing drive assembly is arranged above the turntable, the screen printing head is connected to the output end of the screen printing drive assembly, and is driven by the screen printing drive assembly to move back and forth linearly on the screen printing platform; the screen printing platform is connected between the support plates horizontally extending on both sides of the lower part of the screen printing bracket of the screen printing drive assembly, and is located above the turntable, the screen printing platform uses the screen printing screen as an integral structure, is supported by a connecting seat connected to the two support plates, and is movably arranged in a vertical direction in an installation groove opened on the side of the connecting seat; it is driven by a platform cylinder arranged on the upper part of the connecting seat to move up and down; a screen printing groove with an open top is provided on the upper part of the screen printing screen, and ink is stored in the screen printing groove. When the screen printing screen is attached to the screen from above, the screen printing head moves linearly in the screen printing groove to scrape the ink onto the screen surface to complete the screen printing, and at the same time, the screen printing head scrapes the ink back and levels it when it returns so as to carry out the next screen printing, thereby ensuring the uniformity of the screen printing ink thickness and improving the screen printing quality. The silk screen lifting assembly is set under the turntable. The silk screen assembly can drive the silk screen platform to move up and down as a whole, so as to adjust the gap between it and the turntable in real time to adapt to screen printing of different thicknesses.

[0020] The screen printing head of the present invention uses a screen printing lifting cylinder as a lifting drive component, and two screen printing lifting seats are connected to the output end of the screen printing lifting cylinder at intervals, and the two screen printing lifting seats are respectively connected to an ink scraping component and an ink return component, wherein the ink scraping component is connected to the screen printing lifting seat through an ink scraping connecting plate, and the lower end of the ink scraping connecting plate is rotatably connected to the ink scraping support, and the bottom of the ink scraping support is provided with an ink scraping mounting groove, and the ink scraping plate is installed in the ink scraping mounting groove; the ink return component is connected to the screen printing lifting seat through an ink return connecting plate, and the lower end of the ink return connecting plate is rotatably connected to the ink return support, and the bottom of the ink return support is connected to the ink return plate. The ink return plate extends to the bottom of the squeegee. During screen printing, the two screen printing lifts are driven up and down by the screen printing lift cylinder, so that the squeegee of the squeegee component approaches the screen printing stencil and the ink return plate moves away from the screen printing stencil. The whole body moves in a straight line, and the squeegee scrapes the ink on the screen printing stencil onto the screen surface below the screen printing stencil. After screen printing is completed, the squeegee moves upward away from the screen printing stencil and the ink return plate moves downward close to the screen printing stencil. When the ink return plate follows the squeegee back to the starting position in a straight line, the ink return plate moves in a straight line above the screen printing stencil to scrape the ink back and level it, so as to ensure the uniformity of ink thickness during the next screen printing and improve the screen printing quality.

[0021] The present invention also provides a cleaning mechanism at the screen printing station to solve the problem of ink residue on the surface of the screen during the screen printing process; the cleaning mechanism is arranged on the outside of the screen printing mechanism, and the cleaning mechanism as a whole uses the cleaning support as a bearing component, and the cleaning drive motor arranged on one side of the cleaning support drives the cleaning support plate to move linearly outside the screen printing mechanism through the cleaning drive belt, so as to realize linear movement from one side of the screen printing screen to the other side; the cleaning support drives the rotating cylinder and the rotating seat arranged thereon to move linearly synchronously; at the same time, since the upper end of the rotating cylinder is rotatably connected to the cleaning support plate and the lower end is rotatably connected to the rotating seat, when the rotating cylinder outputs power to extend its output shaft, it drives the rotating shaft connected to its upper end to rotate clockwise, and when the rotating shaft rotates, it drives the rotating seat to gradually move to the horizontal direction through the L-shaped connecting plates arranged at both ends until it moves to the bottom of the screen printing screen, so as to clean the screen. The bottom of the screen plate, at the same time, when the screen printing work is carried out, the output shaft of the rotating cylinder contracts in the opposite direction, and the connecting plate drives the rotating seat to rotate outward, thereby avoiding interference with the screen printing work; in addition, a cleaning receiving roller and a cleaning material roller are rotatably provided at the bottom of the rotating seat, and a cleaning roller belt is tensioned between the two, and when the roller belt motor arranged at the top of the rotating seat drives the cleaning receiving roller to rotate through the cleaning transmission belt, the cleaning roller belt can be continuously pulled out from the cleaning material roller and recovered, so that the cleaning roller belt with residue remaining after cleaning is recovered, so that the clean cleaning roller belt pulled out from the cleaning material roller continues to clean; when the rotating seat rotates to the bottom of the screen printing screen, the roller belt cylinder arranged between the cleaning material roller and the cleaning receiving roller drives the push roller block to push the cleaning roller belt upward, so that the cleaning roller belt sticks to the bottom of the screen printing screen, and completes the cleaning by moving linearly at the bottom of the screen printing screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is one of the three-dimensional structural diagrams of the present invention.

[0023] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 3 This is the third schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 4 This is one of the three-dimensional structural diagrams of the present invention after the components are hidden.

[0026] Figure 5 This is the second schematic diagram of the three-dimensional structure of the present invention after the components are hidden.

[0027] Figure 6 This is the third schematic diagram of the three-dimensional structure of the present invention after the components are hidden.

[0028] Figure 7 This is one of the three-dimensional structural schematic diagrams of the material taking and placing lifting arm of the present invention.

[0029] Figure 8 This is the second schematic diagram of the three-dimensional structure of the material taking and placing lifting arm of the present invention.

[0030] Figure 9 This is one of the three-dimensional structural diagrams of the code scanning and rotating mechanism of the present invention.

[0031] Figure 10 This is the second schematic diagram of the three-dimensional structure of the code scanning and rotating mechanism of the present invention.

[0032] Figure 11 This is one of the three-dimensional structural diagrams of the CCD detection mechanism of the present invention.

[0033] Figure 12 This is the second schematic diagram of the three-dimensional structure of the CCD detection mechanism of the present invention.

[0034] Figure 13 This is one of the three-dimensional structural schematic diagrams of the screen printing mechanism of the present invention.

[0035] Figure 14 This is the second schematic diagram of the three-dimensional structure of the screen printing mechanism of the present invention.

[0036] Figure 15 This is the third schematic diagram of the three-dimensional structure of the screen printing mechanism of the present invention.

[0037] Figure 16 This is one of the three-dimensional structural schematic diagrams of the screen printing platform of the present invention.

[0038] Figure 17 This is the second schematic diagram of the three-dimensional structure of the screen printing platform of the present invention.

[0039] Figure 18 This is one of the three-dimensional structural schematic diagrams of the screen printing head of the present invention.

[0040] Figure 19 This is the second schematic diagram of the three-dimensional structure of the screen printing head of the present invention.

[0041] Figure 20 This is the third schematic diagram of the three-dimensional structure of the screen printing head of the present invention.

[0042] Figure 21 This is the fourth schematic diagram of the three-dimensional structure of the screen printing head of the present invention.

[0043] Figure 22 This is one of the three-dimensional structural schematic diagrams of the ink scraping component of the present invention.

[0044] Figure 23 This is the second schematic diagram of the three-dimensional structure of the ink scraping component of the present invention.

[0045] Figure 24 This is one of the three-dimensional structural schematic diagrams of the ink return component of the present invention.

[0046] Figure 25 This is the second schematic diagram of the three-dimensional structure of the ink return component of the present invention.

[0047] Figure 26 This is one of the three-dimensional structural schematic diagrams of the cleaning mechanism of the present invention.

[0048] Figure 27 This is the second schematic diagram of the three-dimensional structure of the cleaning mechanism of the present invention.

[0049] Figure 28 This is the third schematic diagram of the three-dimensional structure of the cleaning mechanism of the present invention.

[0050] Figure 29 This is the fourth schematic diagram of the three-dimensional structure of the cleaning mechanism of the present invention.

[0051] Figure 30 This is one of the three-dimensional structural schematic diagrams of the cleaning component of the present invention.

[0052] Figure 31 This is the second schematic diagram of the three-dimensional structure of the cleaning component of the present invention.

[0053] Figure 32 This is the third schematic diagram of the three-dimensional structure of the cleaning component of the present invention.

[0054] Figure 33 This is the fourth schematic diagram of the three-dimensional structure of the cleaning component of the present invention.

[0055] Figure 34 This is one of the three-dimensional structural schematic diagrams of the throwing platform of the present invention.

[0056] Figure 35This is the second schematic diagram of the three-dimensional structure of the throwing platform of the present invention. DETAILED DESCRIPTION

[0057] The present invention will be further described below with reference to the accompanying drawings:

[0058] like Figures 1 to 35 As shown, the technical solution adopted by the present invention is as follows: a fully automatic silk screen printing machine, comprising a turntable 2, a material taking and placing arm 4, a code scanning and rotating mechanism 6, a CCD detection mechanism 7, a silk screen mechanism 8, a cleaning mechanism 11 and a throwing platform 12, wherein the above-mentioned turntable 2 is horizontally rotatably arranged on the machine table 1, and the turntable 2 is provided with a loading and unloading station, a first detection station, a silk screen station, a second detection station and a throwing station along the periphery; the above-mentioned material taking and placing arm 4 and the code scanning and rotating mechanism 6 are respectively arranged at intervals on both sides of the loading and unloading station; the above-mentioned CCD detection mechanism 7 includes two groups, which are respectively arranged at the first detection station and the second detection station; the above-mentioned silk screen mechanism 8 is arranged at the silk screen station, and the cleaning mechanism 11 is arranged on the outside of the silk screen mechanism 8; the above-mentioned throwing platform 12 is arranged at the throwing station.

[0059] The material picking and unloading arm 4 includes a material picking and unloading support 41, a first drive motor 42, a connecting rocker 43, a second drive motor 44, a material picking shaft 45 and a material picking rack 46, wherein the above-mentioned material picking and unloading support 41 is horizontally arranged on the machine platform 1; the above-mentioned first drive motor 42 is arranged on the material picking support 41; one end of the above-mentioned connecting rocker 43 is connected to the output shaft of the first drive motor 42 and extends horizontally; the above-mentioned second drive motor 44 is arranged on the upper part of the other end of the connecting rocker 43; the above-mentioned material picking shaft 45 is rotatably arranged in the second drive motor 44 and connected to the output shaft of the second drive motor 44; the above-mentioned material picking rack 46 is a U-shaped frame structure, and a material picking trough 47 is provided on its side. The support block at the bottom of the material picking trough 47 is provided with a vacuum suction hole to absorb and fix the screen in the material picking trough 47; the material picking rack 46 takes the screen from the material conveying mechanism 3 and places it on the correction platform 5 set at the material picking and unloading station. After the correction platform 5 corrects the position of the screen, the screen is placed on the turntable 2.

[0060] The code scanning rotation mechanism 6 includes a code scanning support 61, a code scanning rotation motor 62, a code scanning rotation support plate 63 and a material suction seat 64, wherein the above-mentioned code scanning support 61 is vertically arranged on the machine 1, and the upper part of the code scanning support 61 extends horizontally to above the material picking and unloading station; the above-mentioned code scanning rotation motor 62 is vertically arranged at the upper horizontal extension part of the code scanning support 61, and the output end is arranged downward; the above-mentioned code scanning rotation support plate 63 is horizontally connected to the output end of the code scanning rotation motor 62, and the code scanning rotation motor 62 drives the code scanning rotation support plate 63 to rotate; the above-mentioned material suction seat 64 includes two pieces, and the material suction seat 64 is horizontally connected to the end of the code scanning rotation support plate 63, and the material suction seat 64 is provided with vacuum suction holes to adsorb the screen.

[0061] The CCD detection mechanism 7 includes a detection bracket 71, a CCD lens 72, a dust removal tube 73 and a dust removal flat nozzle 74, wherein the above-mentioned detection bracket 71 is arranged at the first detection station and the second detection station; the above-mentioned CCD lens 72 includes at least two, and the CCD lens 72 is vertically arranged on the detection bracket 71, and the lens direction is set downward; the upper end of the above-mentioned dust removal tube 73 is connected to the top of the detection bracket 71, and extends downward to the bottom of the CCD lens 72; the above-mentioned dust removal flat nozzle 74 is connected to the lower end of the dust removal tube 73, and the nozzle is set toward the first detection station or the second detection station.

[0062] The screen printing mechanism includes a screen printing drive assembly, a screen printing head 82, a screen printing platform 83 and a screen printing lifting assembly, wherein the screen printing drive assembly is arranged on the machine platform and is located above the turntable 2; the screen printing head 82 is connected to the output end of the screen printing drive assembly and is driven by the screen printing drive assembly to move horizontally in a straight line; the screen printing platform 83 is horizontally connected to the screen printing drive assembly and is located between the screen printing assembly and the turntable 2. The screen printing assembly moves in the screen printing platform 83 to print ink on the screen on the turntable 2; the screen printing lifting assembly is arranged below the turntable 2, and the output end is set upward and connected to the screen printing platform 83 to drive the screen printing platform 83 to move up and down.

[0063] The screen printing drive assembly includes a screen printing bracket 81, a screen printing drive motor and a screen printing drive belt; a transmission space is provided inside the screen printing bracket 81; the screen printing drive belt is arranged in the transmission space; the screen printing drive motor is arranged on the rear side wall of the screen printing bracket 81, and the output shaft passes through the side wall of the screen printing bracket 81 and is connected to the screen printing drive belt, and drives the screen printing drive belt to move; the screen printing head 82 is slidably connected to the screen printing bracket 81 in the horizontal direction, and is connected to the screen printing drive belt, and the screen printing drive belt drives the screen printing head 82 to move horizontally and linearly.

[0064] The silk screen printing platform 83 includes a connecting seat 831, a silk screen plate 833, a platform cylinder 835, and a platform locking nut 836, wherein the above-mentioned connecting seat 831 includes two, and the two connecting seats 831 are respectively connected to the two horizontally extending support plates at the bottom of the silk screen bracket 81, and the inner side wall of the connecting seat 831 is provided with a mounting groove 832; the above-mentioned silk screen plate 833 is horizontally arranged in the mounting groove 832 of the two connecting seats 831, and the silk screen plate 833 is provided with a silk screen groove 834; the above-mentioned platform cylinder 835 includes two, and the platform cylinder 835 is vertically arranged on the connecting seat 831, and the output end extends vertically downward into the mounting groove 832 and is connected to the silk screen plate 833; the above-mentioned platform locking nut 836 includes at least two, and the platform locking nut 836 is vertically arranged on the connecting seat 831 and connected to the silk screen plate 833 so as to lock and fix the silk screen plate 833.

[0065] The screen printing head 82 includes a screen printing seat 821, a screen printing lifting cylinder 822, a screen printing lifting seat 823, an ink scraping component 824 and an ink return component 825, wherein the above-mentioned screen printing seat 821 is vertically and movably connected to the screen printing bracket 81 and is connected to the screen printing drive belt; the above-mentioned screen printing lifting cylinder 822 is vertically arranged on the side wall of the screen printing seat 821; the above-mentioned screen printing lifting seat 823 includes two screen printing lifting seats 823, which are slidably connected to the side wall of the screen printing seat 821 in the vertical direction and are connected to the output end of the screen printing lifting cylinder 822; the above-mentioned ink scraping component 824 and ink return component 825 are respectively arranged on the two screen printing lifting seats 823.

[0066] The ink scraping component 824 includes an ink scraping connecting plate 8241, an ink scraping support 8243 and an ink scraping plate 8245, wherein the upper end of the above-mentioned ink scraping connecting plate 8241 is connected to the screen printing lifting seat 823; the above-mentioned ink scraping support 8243 is arranged below the ink scraping connecting plate 8241, and two ink scraping support ears 8242 are provided on the ink scraping support 8243, and the two ink scraping support ears 8242 are arranged at intervals; the lower end of the above-mentioned ink scraping connecting plate 8241 is rotatably connected to the two ink scraping support ears 8242; the lower part of the above-mentioned ink scraping support 8243 is provided with an ink scraping mounting groove 8244; the above-mentioned ink scraping plate 8245 is arranged in the ink scraping mounting groove 8244, and extends downward to the bottom of the ink scraping mounting groove 8244.

[0067] The ink return component 825 includes an ink return connecting plate 8251, an ink return support 8253 and an ink return plate 8254, wherein the upper end of the ink return connecting plate 8251 is connected to the screen printing lifting seat 823; the ink return support 8253 is arranged below the ink return connecting plate 8251, and two ink return support ears 8252 are provided on the ink return support 8253, and the two ink return support ears 8252 are arranged at intervals; the lower end of the ink return connecting plate 8251 is rotatably connected to the two ink return support ears 8252; the ink return plate 8254 is connected to the bottom of the ink return support 8253, and extends downward to the side of the ink scraper 8245.

[0068] The cleaning mechanism 11 includes a cleaning support 111, a cleaning drive assembly, a cleaning rotating assembly and a cleaning assembly, wherein the cleaning support 111 is arranged on the machine 1 in a straight line direction; the cleaning drive assembly is arranged on the cleaning support 111; the cleaning rotating assembly is connected to the output end of the cleaning drive assembly; the cleaning assembly is arranged on the output of the cleaning rotating assembly; after the cleaning assembly is driven to one side of the silk screen printing screen by the cleaning drive assembly, it is driven to rotate to a horizontal direction by the cleaning rotating assembly and is located below the silk screen printing screen, and the bottom surface of the silk screen printing screen is cleaned by the cleaning roller belt.

[0069] like Figures 26 to 33As shown, it is a schematic diagram of the three-dimensional structure of the cleaning mechanism 11 of the present invention. The above-mentioned cleaning drive assembly includes a cleaning drive motor 112, a cleaning drive belt 113 and a cleaning support plate 114, wherein the above-mentioned cleaning drive motor 112 is arranged on the side of the cleaning support 111; the above-mentioned cleaning drive belt 113 is arranged on the side wall of the cleaning support 111, and is tensioned by the tensioning wheel, and the cleaning drive motor 112 drives the cleaning drive belt 113 to move; the above-mentioned cleaning support plate 114 is slidably connected to the side wall of the cleaning support 111 and is connected to the cleaning drive belt 113, and the cleaning drive belt 113 drives the cleaning support plate 114 to move linearly; the above-mentioned cleaning rotation assembly includes The rotating ear 115, the rotating cylinder 116, the rotating connecting plate 117 and the rotating seat 118, wherein the rotating ear 115 includes two pieces, which are respectively arranged in parallel and spaced apart on the upper part of the side wall of the cleaning support plate 114, and a rotating shaft is installed between the two cleaning support plates 114; the output shaft of the rotating cylinder 116 extends upward, and the top of the output shaft is connected to the rotating shaft; the rotating seat 118 is arranged below the rotating cylinder 116 and is rotatably connected to the rotating cylinder 116; the rotating connecting plate 117 is an L-shaped structure, and the rotating connecting plate 117 includes two pieces, the tops of the two rotating connecting plates 117 are respectively fixed to the two ends of the rotating shaft, and the bottom of the rotating connecting plate 117 is fixed The cleaning assembly comprises a roller belt motor 119, a cleaning transmission belt 1110, a cleaning receiving roller 1111, a cleaning material roller 1112, a cleaning roller belt 1113, a roller belt cylinder 1114 and a roller pushing block 1115, wherein the cleaning receiving roller 1111 and the cleaning material roller 1112 are rotatably arranged at the bottom of the rotating seat 118 respectively; the roller belt motor 119 is arranged at the top of the rotating seat 118, and the output shaft is connected to the rotating shaft of the cleaning receiving roller 1111 through the cleaning transmission belt 1110, so as to drive the cleaning receiving roller 1111 to rotate; the cleaning roller belt 1113 is wound around the cleaning material roller 1112 On the top, the outer end of the cleaning roller belt 1113 is connected to the cleaning receiving roller 1111, and the cleaning receiving roller 1111 rotates to pull out the cleaning roller belt 1113 and wind it around its side; the above-mentioned roller belt cylinder 1114 is arranged between the cleaning receiving roller 1111 and the cleaning material roller 1112, and the output end is arranged toward the cleaning roller belt 1113; the above-mentioned pushing roller block 1115 is arranged on the output end of the roller belt cylinder 1114, and has an arc surface structure facing the side of the cleaning roller belt 1113. The roller belt cylinder 1114 drives the pushing roller block 1115 to press the cleaning roller belt 1113 outward, so that the cleaning roller belt 1113 is close to the silk screen printing screen 833, so as to clean the silk screen printing screen 833.

[0070] like Figures 34 to 35The figure shows a three-dimensional structural diagram of the throwing platform 12 of the present invention. The throwing platform 12 of the present invention includes a throwing support, a throwing cylinder 121, a cylinder push rod 122 and a throwing support 123, wherein the above-mentioned throwing support is horizontally arranged; the above-mentioned throwing cylinder 121 is arranged at the bottom of the throwing support; the above-mentioned cylinder push rod 122 is arranged on the throwing support, and is connected to the output end of the throwing support; the above-mentioned throwing support 123 is connected to the cylinder push rod 122, and moves linearly with the cylinder push rod 122, so as to receive the defective screen after inspection from the turntable and throw the defective screen.

[0071] Furthermore, the present invention designs a fully automatic silk screen printing machine that adopts a turntable transmission method to automatically realize material loading and unloading, rotary code scanning, surface detection, highly adaptive silk screen printing, defective product detection, automatic screen cleaning and automatic material throwing.

[0072] The present invention uses a turntable rotatably arranged on the machine as an automatic transport carrier during the screen silk-screen printing process. The turntable is provided with loading and unloading stations, a first inspection station, a silk-screen printing station, a second inspection station and a throwing station at intervals. Material picking and placing arms and a code scanning rotation mechanism are provided on both sides of the loading and unloading stations. The first inspection station and the second inspection station are respectively provided with a CCD detection mechanism; the silk-screen printing station is provided with a silk-screen mechanism and a cleaning mechanism, and the throwing station is provided with a throwing platform; the material picking and placing arm takes out the screen lifted up by the material transmission mechanism and moves it to the correction platform provided under the loading and unloading stations. After the correction platform passes through the turntable to correct the position of the screen, the screen is placed on the material tray. The code scanning rotation mechanism takes out the screen and rotates it 180° to the machine code scanning gun. After the code scanning gun completes the code scanning action, the code scanning rotation mechanism rotates the screen another 180° and puts it back on the turntable. After the code scanning is completed, the screen is rotated and moved to the first inspection station by the turntable. After inspection by the CCD mechanism, it is moved to the silk-screen printing station. After the silk-screen printing platform of the silk-screen printing mechanism approaches the screen on the turntable from above, the silk-screen printing mechanism scrapes the ink on the silk-screen printing platform back and forth and prints it on the screen surface; after silk-screen printing is completed, the screen moves to the second inspection station and is inspected by the CCD mechanism. The defective products detected are moved to the throwing platform by the pick-up and discharge arm at the throwing station. After the material is thrown by the throwing platform, the screen of good products after silk-screen printing is rotated back to the loading and unloading station through the screen, and is moved again by the pick-up and discharge arm and placed in the material tray on the material transmission mechanism.

[0073] The screen printing mechanism of the present invention comprises a screen printing drive assembly, a screen printing head, a screen printing platform and a screen printing lifting assembly, wherein the screen printing drive assembly is arranged above the turntable, the screen printing head is connected to the output end of the screen printing drive assembly, and is driven by the screen printing drive assembly to move back and forth linearly on the screen printing platform; the screen printing platform is connected between the support plates horizontally extending on both sides of the lower part of the screen printing bracket of the screen printing drive assembly, and is located above the turntable, the screen printing platform uses the screen printing screen as an integral structure, is supported by a connecting seat connected to the two support plates, and is movably arranged in a vertical direction in an installation groove opened on the side of the connecting seat; it is driven by a platform cylinder arranged on the upper part of the connecting seat to move up and down; a screen printing groove with an open top is provided on the upper part of the screen printing screen, and ink is stored in the screen printing groove. When the screen printing screen is attached to the screen from above, the screen printing head moves linearly in the screen printing groove to scrape the ink onto the screen surface to complete the screen printing, and at the same time, the screen printing head scrapes the ink back and levels it when it returns so as to carry out the next screen printing, thereby ensuring the uniformity of the screen printing ink thickness and improving the screen printing quality. The silk screen lifting assembly is set under the turntable. The silk screen assembly can drive the silk screen platform to move up and down as a whole, so as to adjust the gap between it and the turntable in real time to adapt to screen printing of different thicknesses.

[0074] The screen printing head of the present invention uses a screen printing lifting cylinder as a lifting drive component, and two screen printing lifting seats are connected to the output end of the screen printing lifting cylinder at intervals, and the two screen printing lifting seats are respectively connected to an ink scraping component and an ink return component, wherein the ink scraping component is connected to the screen printing lifting seat through an ink scraping connecting plate, and the lower end of the ink scraping connecting plate is rotatably connected to the ink scraping support, and the bottom of the ink scraping support is provided with an ink scraping mounting groove, and the ink scraping plate is installed in the ink scraping mounting groove; the ink return component is connected to the screen printing lifting seat through an ink return connecting plate, and the lower end of the ink return connecting plate is rotatably connected to the ink return support, and the bottom of the ink return support is connected to the ink return plate. The ink return plate extends to the bottom of the squeegee. During screen printing, the two screen printing lifts are driven up and down by the screen printing lift cylinder, so that the squeegee of the squeegee component approaches the screen printing stencil and the ink return plate moves away from the screen printing stencil. The whole body moves in a straight line, and the squeegee scrapes the ink on the screen printing stencil onto the screen surface below the screen printing stencil. After screen printing is completed, the squeegee moves upward away from the screen printing stencil and the ink return plate moves downward close to the screen printing stencil. When the ink return plate follows the squeegee back to the starting position in a straight line, the ink return plate moves in a straight line above the screen printing stencil to scrape the ink back and level it, so as to ensure the uniformity of ink thickness during the next screen printing and improve the screen printing quality.

[0075] The present invention also provides a cleaning mechanism at the screen printing station to solve the problem of ink residue on the surface of the screen during the screen printing process; the cleaning mechanism is arranged on the outside of the screen printing mechanism, and the cleaning mechanism as a whole uses the cleaning support as a bearing component, and the cleaning drive motor arranged on one side of the cleaning support drives the cleaning support plate to move linearly outside the screen printing mechanism through the cleaning drive belt, so as to realize linear movement from one side of the screen printing screen to the other side; the cleaning support drives the rotating cylinder and the rotating seat arranged thereon to move linearly synchronously; at the same time, since the upper end of the rotating cylinder is rotatably connected to the cleaning support plate and the lower end is rotatably connected to the rotating seat, when the rotating cylinder outputs power to extend its output shaft, it drives the rotating shaft connected to its upper end to rotate clockwise, and when the rotating shaft rotates, it drives the rotating seat to gradually move to the horizontal direction through the L-shaped connecting plates arranged at both ends until it moves to the bottom of the screen printing screen, so as to clean the screen. The bottom of the screen plate, at the same time, when the screen printing work is carried out, the output shaft of the rotating cylinder contracts in the opposite direction, and the connecting plate drives the rotating seat to rotate outward, thereby avoiding interference with the screen printing work; in addition, a cleaning receiving roller and a cleaning material roller are rotatably provided at the bottom of the rotating seat, and a cleaning roller belt is tensioned between the two, and when the roller belt motor arranged at the top of the rotating seat drives the cleaning receiving roller to rotate through the cleaning transmission belt, the cleaning roller belt can be continuously pulled out from the cleaning material roller and recovered, so that the cleaning roller belt with residue remaining after cleaning is recovered, so that the clean cleaning roller belt pulled out from the cleaning material roller continues to clean; when the rotating seat rotates to the bottom of the screen printing screen, the roller belt cylinder arranged between the cleaning material roller and the cleaning receiving roller drives the push roller block to push the cleaning roller belt upward, so that the cleaning roller belt sticks to the bottom of the screen printing screen, and completes the cleaning by moving linearly at the bottom of the screen printing screen.

[0076] The embodiments of the present invention are merely to introduce specific implementation methods and are not intended to limit the scope of protection. Persons skilled in the art may make certain modifications inspired by these embodiments. Therefore, any equivalent changes or modifications made in accordance with the scope of the present invention are within the scope of the patent claims of the present invention.

Claims

1. A fully automatic screen printing machine, characterized by: It includes a turntable, a material picking and placing arm, a code scanning and rotating mechanism, a CCD detection mechanism, a screen printing mechanism, a cleaning mechanism and a throwing platform, wherein the turntable is horizontally rotatably arranged on the machine platform, and the circumference of the turntable is provided with a loading and unloading station, a first detection station, a screen printing station, a second detection station and a throwing station; the material picking and placing arm and the code scanning and rotating mechanism are respectively arranged at intervals on both sides of the loading and unloading station; the CCD detection mechanism includes two groups, which are respectively arranged at the first detection station and the second detection station; the screen printing mechanism is arranged at the screen printing station, and the cleaning mechanism is arranged outside the screen printing mechanism; the throwing platform is arranged at the throwing station; The cleaning mechanism includes a cleaning support, a cleaning drive assembly, a cleaning rotation assembly, and a cleaning assembly, wherein the cleaning support is arranged on the machine platform in a straight line direction; the cleaning drive assembly is arranged on the cleaning support; the cleaning rotation assembly is connected to the output end of the cleaning drive assembly; the cleaning assembly is arranged on the output of the cleaning rotation assembly; after the cleaning assembly is driven to one side of the screen printing screen by the cleaning drive assembly, it is driven to rotate to a horizontal direction by the cleaning rotation assembly and is located below the screen printing screen, and the bottom surface of the screen printing screen is cleaned by the cleaning roller belt; The cleaning drive assembly includes a cleaning drive motor, a cleaning drive belt, and a cleaning support plate, wherein the cleaning drive motor is arranged on the side of the cleaning support; the cleaning drive belt is arranged on the side wall of the cleaning support and is tensioned by a tensioning wheel, and the cleaning drive motor drives the cleaning drive belt to move; the cleaning support plate is slidably connected to the side wall of the cleaning support and is connected to the cleaning drive belt, and the cleaning drive belt drives the cleaning support plate to move linearly; The cleaning rotary assembly includes a rotary support ear, a rotary cylinder, a rotary connecting plate and a rotary seat, wherein the rotary support ear includes two pieces, which are respectively arranged in parallel and spaced apart on the upper part of the side wall of the cleaning support plate, and a rotating shaft is installed between the two cleaning support plates; the output shaft of the rotary cylinder extends upward, and the top of the output shaft is connected to the rotating shaft; the rotating seat is arranged below the rotary cylinder and is rotatably connected to the rotary cylinder; the rotary connecting plate is an L-shaped structure, and includes two pieces, the tops of the two rotary connecting plates are respectively fixed to the two ends of the rotating shaft, and the bottoms of the rotary connecting plates are fixed to the rotating seat; The cleaning assembly includes a roller belt motor, a cleaning transmission belt, a cleaning receiving roller, a cleaning material roller, a cleaning roller belt, a roller belt cylinder and a pushing roller block, wherein the cleaning receiving roller and the cleaning material roller are respectively rotatably arranged at the bottom of the rotating seat; the roller belt motor is arranged at the top of the rotating seat, and the output shaft is connected to the rotating shaft of the cleaning receiving roller through the cleaning transmission belt to drive the cleaning receiving roller to rotate; the cleaning roller belt is wound on the cleaning material roller, and the outer end of the cleaning roller belt is connected to the cleaning receiving roller, and when the cleaning receiving roller rotates, the cleaning roller belt is pulled out and wound on its side; the roller belt cylinder is arranged between the cleaning receiving roller and the cleaning material roller, and the output end is arranged toward the cleaning roller belt; the pushing roller block is arranged on the output end of the roller belt cylinder, and has an arc surface structure facing the side of the cleaning roller belt. The roller belt cylinder drives the pushing roller block to press the cleaning roller belt outward, so that the cleaning roller belt is close to the silk screen printing screen to clean the silk screen printing screen.

2. The fully automatic screen printing machine according to claim 1, characterized in that: The material picking and unloading arm includes a material picking and unloading support, a first drive motor, a connecting rocker arm, a second drive motor, a material picking shaft and a material picking rack, wherein the material picking and unloading support is horizontally arranged on the machine platform; the first drive motor is arranged on the material picking support; one end of the connecting rocker arm is connected to the output shaft of the first drive motor and extends horizontally; the second drive motor is arranged on the upper part of the other end of the connecting rocker arm; the material picking shaft is rotatably arranged in the second drive motor and connected to the output shaft of the second drive motor; the material picking rack is a U-shaped frame structure, a material picking trough is provided on its side, and a vacuum suction hole is provided on the support block at the bottom of the material picking trough to adsorb and fix the screen in the material picking trough; after the material picking rack takes out the screen from the material transmission mechanism, it is placed on the correction platform set at the material picking and unloading station, and after the correction platform corrects the position of the screen, the screen is placed on the turntable.

3. The fully automatic screen printing machine according to claim 2, characterized in that: The code scanning rotation mechanism includes a code scanning support, a code scanning rotation motor, a code scanning rotation support plate and a material suction seat, wherein the above-mentioned code scanning support is vertically arranged on the machine platform, and the upper part of the code scanning support extends horizontally to above the material picking and unloading station; the above-mentioned code scanning rotation motor is vertically arranged on the upper horizontal extension part of the code scanning support, and the output end is arranged downward; the above-mentioned code scanning rotation support plate is horizontally connected to the output end of the code scanning rotation motor, and the code scanning rotation motor drives the code scanning rotation support plate to rotate; the above-mentioned material suction seat includes two pieces, the material suction seat is horizontally connected to the end of the code scanning rotation support plate, and the material suction seat is provided with vacuum suction holes to facilitate adsorption of the screen.

4. The fully automatic screen printing machine according to claim 3, characterized in that: The CCD detection mechanism includes a detection bracket, a CCD lens, a dust removal tube and a dust removal flat nozzle, wherein the above-mentioned detection bracket is arranged at the first detection station and the second detection station; the above-mentioned CCD lens includes at least two, the CCD lens is vertically arranged on the detection bracket, and the lens direction is set downward; the upper end of the above-mentioned dust removal tube is connected to the top of the detection bracket and extends downward to the bottom of the CCD lens; the above-mentioned dust removal flat nozzle is connected to the lower end of the dust removal tube, and the nozzle is set toward the first detection station or the second detection station.

5. The fully automatic screen printing machine according to claim 4, characterized in that: The silk screen printing mechanism includes a silk screen driving component, a silk screen head, a silk screen platform and a silk screen lifting component, wherein the silk screen driving component is arranged on the machine platform and is located above the turntable; the silk screen head is connected to the output end of the silk screen driving component and is driven by the silk screen driving component to move horizontally in a straight line; the silk screen platform is horizontally connected to the silk screen driving component and is located between the silk screen component and the turntable, and the silk screen component moves in the silk screen platform to print ink on the screen on the turntable; the silk screen lifting component is arranged below the turntable, and the output end is set upward and connected to the silk screen platform to drive the silk screen platform to move up and down.

6. The fully automatic screen printing machine according to claim 5, characterized in that: The screen printing drive assembly includes a screen printing bracket, a screen printing drive motor and a screen printing drive belt; a transmission space is provided inside the screen printing bracket; the screen printing drive belt is arranged in the transmission space; the screen printing drive motor is arranged on the rear side wall of the screen printing bracket, and the output shaft passes through the side wall of the screen printing bracket and is connected to the screen printing drive belt, and drives the screen printing drive belt to move; the screen printing head is slidably connected to the screen printing bracket in the horizontal direction and is connected to the screen printing drive belt, and the screen printing drive belt drives the screen printing head to move horizontally and linearly.

7. The fully automatic screen printing machine according to claim 6, characterized in that: The silk screen printing platform includes a connecting seat, a silk screen screen, a platform cylinder, and a platform locking nut, wherein the above-mentioned connecting seat includes two, and the two connecting seats are respectively connected to the two horizontally extending support plates at the bottom of the silk screen bracket, and the inner side wall of the connecting seat is provided with a mounting groove; the above-mentioned silk screen screen is horizontally arranged in the mounting grooves of the two connecting seats, and the silk screen screen is provided with a silk screen groove; the above-mentioned platform cylinder includes two, and the platform cylinder is vertically arranged on the connecting seat, and the output end extends vertically downward into the mounting groove and is connected to the silk screen screen; the above-mentioned platform locking nut includes at least two, and the platform locking nut is vertically arranged on the connecting seat and connected to the silk screen screen so as to lock and fix the silk screen screen.

8. The fully automatic screen printing machine according to claim 7, characterized in that: The screen printing head includes a screen printing base, a screen printing lifting cylinder, a screen printing lifting base, an ink scraping component and an ink return component, wherein the screen printing base is vertically and movably connected to the screen printing bracket and is connected to the screen printing drive belt; the screen printing lifting cylinder is vertically arranged on the side wall of the screen printing base; the screen printing lifting base includes two, and the two screen printing lifting bases are slidably connected to the side wall of the screen printing base in the vertical direction and are connected to the output end of the screen printing lifting cylinder; the ink scraping component and the ink return component are respectively arranged on the two screen printing lifting bases.

9. The fully automatic screen printing machine according to claim 8, characterized in that: The ink scraping component includes an ink scraping connecting plate, an ink scraping support and an ink scraping plate, wherein the upper end of the ink scraping connecting plate is connected to the screen printing lifting seat; the ink scraping support is arranged below the ink scraping connecting plate, and the ink scraping support is provided with two ink scraping support ears, which are arranged at intervals; the lower end of the ink scraping connecting plate is rotatably connected to the two ink scraping support ears; the lower part of the ink scraping support is provided with an ink scraping mounting groove; the ink scraping plate is arranged in the ink scraping mounting groove and extends downward to the bottom of the ink scraping mounting groove.

10. The fully automatic screen printing machine according to claim 9, characterized in that: The ink return component includes an ink return connecting plate, an ink return support and an ink return plate, wherein the upper end of the ink return connecting plate is connected to the silk screen lifting seat; the ink return support is arranged below the ink return connecting plate, and the ink return support is provided with two ink return support ears, which are arranged at intervals; the lower end of the ink return connecting plate is rotatably connected to the two ink return support ears; the ink return plate is connected to the bottom of the ink return support and extends downward to the side of the scraper plate.

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