Full-automatic double-station screen printing machine

Abstract

The application discloses a kind of full-automatic double-station silk-screen machine, including material conveying part and silk-screen part, material conveying part is arranged along linear direction;Silk-screen part includes two groups;Material conveying part is equipped with material conveying mechanism;Silk-screen part includes carousel, take and place material handling arm, code scanning rotary mechanism, CCD detection mechanism, silk-screen mechanism, unloading platform and magazine mechanism, carousel is horizontally rotatably arranged on machine table;Take and place material handling arm and code scanning rotary mechanism are respectively interval arranged in the two sides of loading and unloading station;CCD detection mechanism is arranged at first detection station and second detection station;Silk-screen mechanism is arranged at silk-screen station;Unloading platform is arranged at defective product unloading station, magazine mechanism is arranged at the end of unloading platform.The application realizes screen automatic loading and unloading, double-station independent synchronous silk-screen, greatly improves silk-screen capacity, realizes automatically take and place material, rotary code scanning, surface detection, height self-adaptive silk-screen, defective product detection and automatic pick-up storage.

Description

Technical Field

[0001] The present invention relates to the field of screen manufacturing, in particular to a fully automatic double-station 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 currently faces challenges in industrial automation and integration. Replacing traditional manual production with automated production lines is a future trend. Surface finishing is a key process in screen manufacturing, such as screen silkscreen printing, which creates the desired pattern on the screen surface. When carrying out 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 is unable to carry out batch processing, and has low production capacity and efficiency. It cannot adapt to the integration requirements of the current automated production line. In the design process of the silk screen automation 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 automation production line, in order to improve the feeding efficiency of the silk screen screen, it is necessary to use a material tray that can carry multiple screens as a material transmission carrier. A single material tray can carry multiple screens, and then the screens are batch loaded by supplying the material tray. At the same time, the material trays are stacked for centralized storage. In the material tray feeding process, it is necessary to solve the problem of automatic placement of stacked material trays, automatic transmission blocking of material trays, and automatic removal of screens in the material tray; 3. In the integrated design process of the silk screen automation production line, since each screen has a QR code, in order to To achieve production traceability, the screen scanning problem must be solved before silk screen printing; 4. In addition, since the screen silk screen printing process includes actions such as material 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 automatic transmission; 5. During the automatic screen transmission process, 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; 6. During the silk screen printing process, after the ink is scraped through 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; 7. The defective products generated during the silk screen printing process need to be stored centrally. Therefore, in the process of automated silk screen integration design, the problem of automatic pick-up and storage 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 double-sided double-station structure with a single material channel, which realizes automatic loading and unloading of the screen and independent and synchronous silk screen printing of the double stations, greatly improving the silk screen printing capacity. It adopts a turntable transmission method to automatically realize material loading and unloading, rotary scanning, surface detection, highly adaptive silk screen printing, defective product detection and automatic pick-up and storage of fully automatic double-station silk screen printing machines.

[0005] The technical solution adopted by the present invention is as follows: a fully automatic double-station screen printing machine, including a material transmission part and a screen printing part, wherein the material transmission part is arranged in a straight line direction, and the two ends of the material transmission part are respectively connected to the upper and lower workstations, and the screen to be screen-printed is transmitted forward in a straight line through the material transmission part; the screen printing part includes two groups, which are respectively arranged on both sides of the material transmission part. After the screen on the material transmission part is transferred to the two groups of screen printing parts to complete the surface screen printing, it returns to the material transmission part and flows into the next workstation; the material transmission part is provided with a material transmission mechanism; the screen printing part includes a turntable, a material picking and placing lifting arm , code scanning and rotating mechanism, CCD detection mechanism, silk screen printing mechanism, unloading platform and magazine mechanism, wherein the above-mentioned turntable is horizontally rotatably arranged on the machine platform, and the circumference of the turntable is provided with loading and unloading stations, a first detection station, a silk screen printing station, a second detection station and a defective product unloading station; the above-mentioned material picking and placing lifting arms and the code scanning and rotating mechanism are respectively arranged at intervals on both sides of the loading and unloading stations; the above-mentioned CCD detection mechanism includes two groups, which are respectively arranged at the first detection station and the second detection station; the above-mentioned silk screen printing mechanism is arranged at the silk screen printing station; the above-mentioned unloading platform is arranged at the defective product unloading station, and the magazine mechanism is arranged at the end of the unloading platform.

[0006] Preferably, the material transmission mechanism is arranged at the loading and unloading stations, and the material transmission mechanism includes a transmission support plate, a conveyor belt, a limit plate, a tray placement assembly and a blocking support assembly, wherein the above-mentioned transmission support plate is arranged horizontally; the above-mentioned conveyor belt is sleeved on the transmission support plate and is tensioned by a tensioning wheel rotatably arranged at both ends of the transmission support plate, and is driven by a transmission motor to move; the transmission support plate is provided with a storage tray station and a material picking station; the above-mentioned limit plate includes at least two pieces, the limit plates are arranged at the side of the storage tray station in the vertical direction and extend vertically upward, and material trays are stacked up in the storage space formed between the limit plates; the above-mentioned tray placement assembly is arranged below the storage tray station, the tray placement assembly clamps the second layer of material trays from bottom to top and then lifts it upward, so that the bottom layer of material tray is transmitted forward to the material picking station via the conveyor belt; the above-mentioned blocking support assembly is arranged at the material picking station, the blocking support assembly blocks the linearly moving material tray, and pushes the screen in the material tray upward so that the material picking and unloading lifting arm can take out the screen.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[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 single material channel double-sided double-station structure, which realizes automatic loading and unloading of the screen and independent and synchronous silk screen printing of the double stations, greatly improving the silk screen printing capacity. It adopts a turntable transmission method and automatically realizes material loading and unloading, rotary scanning, surface detection, highly adaptive silk screen printing, defective product detection and automatic pick-up and storage of fully automatic double-station silk screen printing machines.

[0018] The present invention as a whole uses a material conveying mechanism arranged horizontally in a straight line direction as the docking part of the upper and lower workstations, thereby realizing the automatic transmission and connection of materials; at the same time, silk screen parts are respectively provided on the corresponding two sides of the material conveying mechanism, and the two silk screen parts independently take out the transmitted screen from the material conveying mechanism and enter the interior to complete the automatic silk screen printing on the screen surface, and then return the silk screen printed screen to the material conveying mechanism, which continues to transport it to the next workstation for subsequent processing; this method uses a single-channel material path as a benchmark, and simultaneously matches two independent silk screen printing parts to complete the automatic silk screen printing action of the screen, which increases the silk screen printing efficiency of a single machine by 2 times.

[0019] The material transmission mechanism of the present invention uses a horizontally arranged material transmission support plate as a carrier, and both ends of the material transmission support plate are rotatably provided with tension wheels, and the tension wheels at both ends are correspondingly sleeved with transmission belts. When the transmission belt is driven by the transmission motor to move, the material tray placed on the material transmission support plate is transmitted straight forward; in particular, the material transmission support plate of the present invention is provided with storage tray stations and material taking stations at intervals along the material tray transmission direction, and the storage tray stations are limited by vertically arranged limit plates as limit structures, and storage space is formed between each limit plate, and multiple material trays are stacked up in the storage space; at the same time, a tray placing assembly is provided below the storage station, and the tray placing mechanism as a whole includes movement paths in two degrees of freedom directions, namely, lifting movement in the vertical direction and linear movement in the horizontal direction, wherein the horizontal linear movement includes two groups of actuators, and the two groups of actuators are synchronously linked in opposite directions from the left and right sides, that is, synchronously clamping or releasing the material tray. The vertical lifting motion is achieved by the lifting cylinder of the lifting assembly driving the tray top seat to move up and down along the guide column. The horizontal linear motion is achieved by a chuck cylinder located at the bottom of the tray top seat as the power output structure. The innovation of the present invention lies in the fact that only a single chuck cylinder is used as the power output component to achieve reverse synchronous linkage of the chuck slides located on the left and right sides of the tray top seat. Specifically, the chuck slides are slidably mounted on chuck rails located on the left and right sides of the tray top seat. Two chuck support plates are spaced apart on the chuck slides, and chuck blocks are located on the inner sides of the chuck support plates. Two tensioning pulleys are spaced apart on the tray top seat in the left and right directions. A chuck belt is tensioned between the two tensioning pulleys. The two chuck slides are fixedly connected to the front and rear sides of the chuck belt via connecting blocks. By using the chuck belt as the motion connection component, when one chuck slide moves, the chuck belt synchronizes the other chuck slide with the reverse motion. At the same time, the output shaft of the chuck cylinder is fixedly connected to one chuck slide via a connecting plate that passes upward through the disc placement seat. This allows the chuck cylinder's power to be transmitted to only one chuck slide via the connecting plate. This drives the linear motion of that chuck slide, while simultaneously driving the chuck belt via the connecting block. This movement of the chuck belt drives the other chuck slide in sync. Because the two chuck slides are fixedly connected to the front and rear edges of the chuck belt, respectively, they move in opposite directions in sync. This structural approach effectively meets the requirements of both chuck and placement processes.In the natural state, the chuck cylinder drives the two chuck slides to move inward, and after clamping the bottom tray of the upper and lower stacked trays from the left and right sides through the chuck blocks, all the trays are supported. When the material channel needs to release a tray, the lifting cylinder drives the tray top seat to descend, and after the bottom tray is placed on the conveying support, the chuck cylinder drives the two chuck slides to move outward, and after the left and right chuck blocks release the tray, the lifting cylinder drives the tray top seat to rise one tray height again, so that the chuck blocks rise to the left and right sides of the second-to-last tray, and the chuck cylinder drives the two chuck blocks to clamp the second-to-last tray, and then supports all the trays above it from the second-to-last tray, and the bottom tray is transmitted outward through the conveyor belt on the conveying support. The present invention, through the ingenious design of the above-mentioned tray placement mechanism, solves the problem of automatic unloading of stacked trays. At the same time, a chuck cylinder is used as a power mechanism, and the principle of reverse linkage of the front and rear movements of the chuck transmission belt is utilized to achieve automatic reverse linkage of the left and right sides for chuck and tray placement. While reducing production costs, the synchronization of chuck and tray placement is excellently guaranteed. At the same time, the present invention is provided with a blocking support assembly at the material retrieving station. The blocking support assembly drives a block through the material transmission mechanism to extend above the material tray to block the material tray in transit. At the same time, the supporting cylinder drives the material suction nozzle through the material tray to lift the screen placed in the material tray upward, so that the material retrieving and unloading robot can remove the screen.

[0020] The silk-screen printing part of 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 defective product unloading 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 CCD detection mechanisms; the silk-screen printing station is provided with a silk-screen printing mechanism, and the defective product unloading station is provided with a unloading platform and a magazine mechanism; 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 screen position, 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 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 via 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 picked up by the unloading platform and transferred to the magazine mechanism for storage. The qualified screen after silk-screen printing is rotated back to the loading and unloading station via the screen, and is moved again by the material picking and placing arm and placed in the material tray on the material transmission mechanism.

[0021] 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.

[0022] 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is one of the three-dimensional structural diagrams of the present invention.

[0024] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 3 This is one of the three-dimensional structural diagrams of the present invention after the components are hidden.

[0026] Figure 4 This is the second schematic diagram of the three-dimensional structure of the present invention after the components are hidden.

[0027] Figure 5 This is the third schematic diagram of the three-dimensional structure of the present invention after the components are hidden.

[0028] Figure 6 This is the fourth schematic diagram of the three-dimensional structure of the present invention after the components are hidden.

[0029] Figure 7 This is the fifth schematic diagram of the three-dimensional structure of the present invention after the components are hidden.

[0030] Figure 8 This is the sixth schematic diagram of the three-dimensional structure of the present invention after the components are hidden.

[0031] Figure 9 This is the seventh schematic diagram of the three-dimensional structure of the present invention after the components are hidden.

[0032] Figure 10 This is one of the three-dimensional structural diagrams of the material transmission mechanism of the present invention.

[0033] Figure 11 This is the second schematic diagram of the three-dimensional structure of the material transmission mechanism of the present invention.

[0034] Figure 12 This is the third schematic diagram of the three-dimensional structure of the material transmission mechanism of the present invention.

[0035] Figure 13 This is one of the three-dimensional structural schematic diagrams of the disk placement assembly of the present invention.

[0036] Figure 14 This is the second schematic diagram of the three-dimensional structure of the disk placement assembly of the present invention.

[0037] Figure 15 This is the third schematic diagram of the three-dimensional structure of the disk placement assembly of the present invention.

[0038] Figure 16 This is one of the three-dimensional structural schematic diagrams of the blocking and supporting assembly of the present invention.

[0039] Figure 17 This is the second schematic diagram of the three-dimensional structure of the blocking and supporting assembly of the present invention.

[0040] Figure 18 This is the third schematic diagram of the three-dimensional structure of the material-blocking support assembly of the present invention.

[0041] Figure 19 This is one of the three-dimensional structural schematic diagrams of the material taking and placing lifting arm of the present invention.

[0042] Figure 20This is the second schematic diagram of the three-dimensional structure of the material taking and placing lifting arm of the present invention.

[0043] Figure 21 This is one of the three-dimensional structural diagrams of the code scanning and rotating mechanism of the present invention.

[0044] Figure 22 This is the second schematic diagram of the three-dimensional structure of the code scanning and rotating mechanism of the present invention.

[0045] Figure 23 This is one of the three-dimensional structural schematic diagrams of the CCD detection mechanism of the present invention.

[0046] Figure 24 This is the second schematic diagram of the three-dimensional structure of the CCD detection mechanism of the present invention.

[0047] Figure 25 This is one of the three-dimensional structural schematic diagrams of the screen printing mechanism of the present invention.

[0048] Figure 26 This is the second schematic diagram of the three-dimensional structure of the screen printing mechanism of the present invention.

[0049] Figure 27 This is the third schematic diagram of the three-dimensional structure of the screen printing mechanism of the present invention.

[0050] Figure 28 This is one of the three-dimensional structural schematic diagrams of the screen printing platform of the present invention.

[0051] Figure 29 This is the second schematic diagram of the three-dimensional structure of the screen printing platform of the present invention.

[0052] Figure 30 This is one of the three-dimensional structural schematic diagrams of the screen printing head of the present invention.

[0053] Figure 31 This is the second schematic diagram of the three-dimensional structure of the screen printing head of the present invention.

[0054] Figure 32 This is the third schematic diagram of the three-dimensional structure of the screen printing head of the present invention.

[0055] Figure 33 This is the fourth schematic diagram of the three-dimensional structure of the screen printing head of the present invention.

[0056] Figure 34 This is one of the three-dimensional structural schematic diagrams of the ink scraping component of the present invention.

[0057] Figure 35 This is the second schematic diagram of the three-dimensional structure of the ink scraping component of the present invention.

[0058] Figure 36 This is one of the three-dimensional structural schematic diagrams of the ink return component of the present invention.

[0059] Figure 37This is the second schematic diagram of the three-dimensional structure of the ink return component of the present invention.

[0060] Figure 38 This is one of the three-dimensional structural schematic diagrams of the blanking platform of the present invention.

[0061] Figure 39 This is the second schematic diagram of the three-dimensional structure of the blanking platform of the present invention.

[0062] Figure 40 This is one of the three-dimensional structural schematic diagrams of the magazine mechanism of the present invention.

[0063] Figure 41 This is the second schematic diagram of the three-dimensional structure of the magazine mechanism of the present invention.

[0064] Figure 42 This is the third schematic diagram of the three-dimensional structure of the magazine mechanism of the present invention. DETAILED DESCRIPTION

[0065] The present invention will be further described below with reference to the accompanying drawings:

[0066] like Figures 1 to 42 As shown, the technical solution adopted by the present invention is as follows: a fully automatic double-station screen printing machine, including a material transmission part A and a screen printing part B, wherein the material transmission part A is arranged in a straight line direction, and the two ends of the material transmission part A are respectively connected to the upper and lower workstations, and the screen to be screen-printed is transmitted forward in a straight line through the material transmission part A; the screen printing part B includes two groups, which are respectively arranged on both sides of the material transmission part A. After the screen on the material transmission part A is transferred to the two groups of screen printing parts B to complete the surface screen printing, it returns to the material transmission part A and flows into the next workstation; the material transmission part A is provided with a material transmission mechanism 3; the screen printing part B includes a turntable 2, a material picking and placing lifting arm 4. Code scanning and rotating mechanism 6, CCD detection mechanism 7, silk screen mechanism 8, unloading platform 9 and magazine mechanism 10, wherein the above-mentioned turntable 2 is horizontally rotatably arranged on the machine 1, and the turntable 2 is provided with loading and unloading stations, a first detection station, a silk screen station, a second detection station and a defective product unloading station along the periphery; the above-mentioned material picking 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 stations; 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; the above-mentioned unloading platform 9 is arranged at the defective product unloading station, and the magazine mechanism 10 is arranged at the end of the unloading platform 9.

[0067] Preferably, the material transmission mechanism 3 is arranged at the loading and unloading station, and the material transmission mechanism 3 includes a transmission support plate 30, a transmission belt, a limit plate, a tray assembly and a blocking material support assembly, wherein the transmission support plate 30 is arranged horizontally; the transmission belt is sleeved on the transmission support plate 30, and is tensioned by the tensioning wheels rotatably arranged at both ends of the transmission support plate 30, and is driven by the transmission motor to move; the transmission support plate 30 is provided with a storage tray station and a material taking station; the limit plate includes at least two pieces, and the limit plate is arranged vertically. The trays are stacked up in the storage space formed between the limit plates; the tray placing assembly is arranged below the tray storage station, and the tray placing assembly clamps the stacked trays from bottom to top on the second layer and then lifts them upward, so that the bottom layer of trays is transported forward to the material picking station via the conveyor belt; the blocking material supporting assembly is arranged at the material picking station, and the blocking material supporting assembly blocks the trays moving in a straight line and lifts the screen in the tray upward so that the material picking and placing lifting arm 4 can take out the screen.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] The silk screen lifting assembly includes a pushing bracket 84, a pushing motor 85, a pushing support plate 86 and a pushing plate 87, wherein the above-mentioned pushing bracket 84 is arranged below the turntable; the above-mentioned pushing motor 85 is arranged at the lower part of the pushing bracket 84, and the output end extends upward through the pushing bracket 84 and is connected with a screw rod; the above-mentioned pushing support plate 86 is horizontally arranged above the pushing bracket 84, and is guided and limited by a guide column vertically arranged on the pushing bracket 84. The pushing support plate 86 is threadedly connected to the screw rod, and the pushing motor 85 drives the pushing support plate 86 to move up and down along the guide column through the screw rod; the above-mentioned pushing plate 87 is horizontally arranged on the pushing support plate 86, and moves up and down with the pushing support plate 86.

[0078] like Figures 13 to 15The figure is a schematic diagram of the three-dimensional structure of the tray placing assembly of the present invention, which includes a tray placing support 31, a tray placing top seat 33, a lifting assembly and a chuck assembly, wherein the tray placing support 31 is arranged horizontally; the lifting assembly is connected to the tray placing support 31, and the output end is arranged upward; the tray placing top seat 33 is arranged horizontally above the tray placing support 31 and is connected to the output end of the lifting assembly, and the lifting assembly drives the tray placing top seat 33 to move up and down; the chuck assembly includes two groups, which are respectively arranged on both sides of the tray placing top seat 33 and extend upward through the conveying support platform. The chuck assembly clamps or releases the material tray from both sides of the tray placing top seat 33 so as to place the lowest layer of material tray on the conveying support plate; The jacking assembly includes a jacking cylinder 32 and a guide column 34, wherein the jacking cylinder 32 is arranged on the disk support 31, and the output end is arranged upward; the guide column 34 includes two, and the two guide columns 34 are respectively vertically arranged on the disk support 31, and extend vertically upward through the disk top seat 33, and are slidably connected to the disk top seat 33; the output end of the jacking cylinder 32 is connected to the bottom of the disk top seat 33; the jacking cylinder 32 drives the disk top seat 33 to move up and down along the guide column 34; the chuck assembly includes a chuck slide rail 35, a chuck slide 36, a chuck support plate 37, a chuck block 38, a chuck transmission belt 39, a connecting block 310, a chuck cylinder 311 and a connecting plate 312, wherein the above-mentioned chuck slide rails 35 include two groups, which are respectively arranged on the left and right sides of the disk placement top seat 35; the above-mentioned chuck slide 36 is slidably connected to the chuck slide rails 35; the above-mentioned chuck support plate 37 includes two blocks, the chuck support plates 37 are arranged on the chuck slide 36 at intervals, and extend vertically upward through the transmission support platform; the above-mentioned chuck block 38 is arranged on the top side wall of the chuck support plate 37, and the chuck block 38 extends horizontally toward the inside; the chuck transmission belt 39 is arranged on the disk placement top seat 33 along the direction of the chuck slide rails 35, and is tensioned by a tensioning roller slidably arranged on the disk placement top seat 33; the above-mentioned connecting block 310 includes two blocks, one side of the two connecting blocks 310 is divided into It is respectively connected to the chuck slides 36 on the left and right sides, and the other sides of the two connecting blocks 310 are respectively fixed on both sides of the chuck transmission belt 39; the above-mentioned chuck cylinder 311 is arranged at the bottom of the disc placing top seat 33, and the output end is arranged toward the chuck slide rail 35; one end of the connecting plate 312 is connected to the output end of the chuck cylinder 311, and the other end extends upward through the disc placing top seat 33 and is connected to a chuck slide 36. When the chuck cylinder 311 drives the chuck slide 36 to slide straightly to one side through the connecting plate 312, the chuck slide 36 drives the other chuck slide 36 to move in the opposite direction through the connecting block 310 and the chuck transmission belt 39.

[0079] like Figures 16 to 18As shown in the figure, it is a schematic diagram of the three-dimensional structure of the blocking support assembly of the present invention, which includes a blocking support plate 313, a blocking support 314, a blocking cylinder 315, a stopper 316, a support cylinder 317 and a support nozzle 318, wherein the blocking support plate 313 is horizontally arranged below the transmission support plate 30; the blocking support 314 is arranged on the blocking support plate 313; the blocking cylinder 315 is vertically arranged on the blocking support 314, and the output end is arranged upward; the stopper 316 is vertically arranged on the blocking cylinder 317 and the output end is arranged upward; The supporting cylinder 315 is on the output end and is driven by the blocking cylinder 315 to move up and down so as to block the material tray; the above-mentioned supporting cylinder 317 includes at least two supporting cylinders 317, which are vertically arranged on the blocking support plate 313, and the output end is arranged upward; the above-mentioned supporting suction nozzle 318 includes at least two supporting suction nozzles 318, which are on the output end of the supporting cylinder 317 and the mouth is arranged upward. The supporting cylinder drives the supporting suction nozzle 318 to pass through the material tray and lift the screen placed in the material tray upward and horizontally, so that the material taking and placing arm 4 can take out the screen.

[0080] like Figures 38 to 42 , is a three-dimensional structural diagram of the unloading platform 9 and the magazine mechanism 10 of the present invention, wherein the unloading platform 9 is horizontally arranged on the machine 1, and the unloading platform 9 includes an unloading support 91, an unloading motor 92, an unloading transmission belt 93, an unloading slide 94 and an unloading support 95, wherein the unloading support 91 is horizontally arranged, and transmission wheels are rotatably provided at both ends of the unloading support 91; the unloading transmission belt 93 is sleeved on the transmission wheels at both ends of the unloading support 91; the unloading motor 92 is arranged on the unloading support 91. One end of the support 91 and the output end extend downward and are connected to the transmission wheel so as to drive the unloading transmission belt 93 to move by driving the transmission wheel to rotate; the above-mentioned unloading slide 94 is slidably arranged on the unloading support 91 in a straight line direction and is fixed to one side of the unloading transmission belt 93, and the unloading transmission belt 93 drives the unloading slide 94 to move in a straight line; the above-mentioned unloading support platform 95 is arranged on the upper part of the unloading slide 94 and extends horizontally to form a supporting surface, and vacuum suction holes are arranged on the supporting surface to adsorb the screen.

[0081] The magazine mechanism 10 is arranged at the end of the unloading platform 9, and the magazine mechanism 10 includes a magazine support 101, a magazine motor 102, a magazine transmission belt 103, a magazine screw rod 104, a magazine 105 and a magazine support plate 106, wherein the above-mentioned magazine support 101 is vertically arranged on the machine platform; the above-mentioned magazine motor 102 is arranged on one side of the magazine support 101, and the output end is arranged upward; the above-mentioned magazine screw rod 104 is rotatably arranged on the side of the magazine support 101 along the vertical direction; the above-mentioned magazine transmission belt 103 is connected to the magazine support 105 and the magazine support plate 106. The output shaft of the magazine motor 102 is connected to the magazine screw rod 104 to drive the magazine screw rod 104 to rotate; the above-mentioned magazine 105 is slidably connected to the side wall of the magazine support 101 and is threadedly connected to the magazine screw rod 104. A storage space with an open surface on one side is provided in the magazine; the above-mentioned magazine support plate 106 includes at least two pieces, and the magazine support plates 106 are arranged in parallel and spaced apart in the vertical direction in the storage space of the magazine. The unloading platform 9 transports the screen horizontally and straightly, and the screen slides into the magazine support plate 106 through the open surface for storage.

[0082] Furthermore, the present invention designs a single material channel double-sided double-station structure, which realizes automatic loading and unloading of the screen and independent and synchronous silk screen printing of the double stations, greatly improving the silk screen printing capacity. It adopts a turntable transmission method to automatically realize material loading and unloading, rotary scanning, surface detection, highly adaptive silk screen printing, defective product detection and automatic pick-up and storage of fully automatic double-station silk screen printing machines.

[0083] The present invention as a whole uses a material conveying mechanism arranged horizontally in a straight line direction as the docking part of the upper and lower workstations, thereby realizing the automatic transmission and connection of materials; at the same time, silk screen parts are respectively provided on the corresponding two sides of the material conveying mechanism, and the two silk screen parts independently take out the transmitted screen from the material conveying mechanism and enter the interior to complete the automatic silk screen printing on the screen surface, and then return the silk screen printed screen to the material conveying mechanism, which continues to transport it to the next workstation for subsequent processing; this method uses a single-channel material path as a benchmark, and simultaneously matches two independent silk screen printing parts to complete the automatic silk screen printing action of the screen, which increases the silk screen printing efficiency of a single machine by 2 times.

[0084] The material transmission mechanism of the present invention uses a horizontally arranged material transmission support plate as a carrier, and both ends of the material transmission support plate are rotatably provided with tension wheels, and the tension wheels at both ends are correspondingly sleeved with transmission belts. When the transmission belt is driven by the transmission motor to move, the material tray placed on the material transmission support plate is transmitted straight forward; in particular, the material transmission support plate of the present invention is provided with storage tray stations and material taking stations at intervals along the material tray transmission direction, and the storage tray stations are limited by vertically arranged limit plates as limit structures, and storage space is formed between each limit plate, and multiple material trays are stacked up in the storage space; at the same time, a tray placing assembly is provided below the storage station, and the tray placing mechanism as a whole includes movement paths in two degrees of freedom directions, namely, lifting movement in the vertical direction and linear movement in the horizontal direction, wherein the horizontal linear movement includes two groups of actuators, and the two groups of actuators are synchronously linked in opposite directions from the left and right sides, that is, synchronously clamping or releasing the material tray. The vertical lifting motion is achieved by the lifting cylinder of the lifting assembly driving the tray top seat to move up and down along the guide column. The horizontal linear motion is achieved by a chuck cylinder located at the bottom of the tray top seat as the power output structure. The innovation of the present invention lies in the fact that only a single chuck cylinder is used as the power output component to achieve reverse synchronous linkage of the chuck slides located on the left and right sides of the tray top seat. Specifically, the chuck slides are slidably mounted on chuck rails located on the left and right sides of the tray top seat. Two chuck support plates are spaced apart on the chuck slides, and chuck blocks are located on the inner sides of the chuck support plates. Two tensioning pulleys are spaced apart on the tray top seat in the left and right directions. A chuck belt is tensioned between the two tensioning pulleys. The two chuck slides are fixedly connected to the front and rear sides of the chuck belt via connecting blocks. By using the chuck belt as the motion connection component, when one chuck slide moves, the chuck belt synchronizes the other chuck slide with the reverse motion. At the same time, the output shaft of the chuck cylinder is fixedly connected to one chuck slide via a connecting plate that passes upward through the disc placement seat. This allows the chuck cylinder's power to be transmitted to only one chuck slide via the connecting plate. This drives the linear motion of that chuck slide, while simultaneously driving the chuck belt via the connecting block. This movement of the chuck belt drives the other chuck slide in sync. Because the two chuck slides are fixedly connected to the front and rear edges of the chuck belt, respectively, they move in opposite directions in sync. This structural approach effectively meets the requirements of both chuck and placement processes.In the natural state, the chuck cylinder drives the two chuck slides to move inward, and after clamping the bottom tray of the upper and lower stacked trays from the left and right sides through the chuck blocks, all the trays are supported. When the material channel needs to release a tray, the lifting cylinder drives the tray top seat to descend, and after the bottom tray is placed on the conveying support, the chuck cylinder drives the two chuck slides to move outward, and after the left and right chuck blocks release the tray, the lifting cylinder drives the tray top seat to rise one tray height again, so that the chuck blocks rise to the left and right sides of the second-to-last tray, and the chuck cylinder drives the two chuck blocks to clamp the second-to-last tray, and then supports all the trays above it from the second-to-last tray, and the bottom tray is transmitted outward through the conveyor belt on the conveying support. The present invention, through the ingenious design of the above-mentioned tray placement mechanism, solves the problem of automatic unloading of stacked trays. At the same time, a chuck cylinder is used as a power mechanism, and the principle of reverse linkage of the front and rear movements of the chuck transmission belt is utilized to achieve automatic reverse linkage of the left and right sides for chuck and tray placement. While reducing production costs, the synchronization of chuck and tray placement is excellently guaranteed. At the same time, the present invention is provided with a blocking support assembly at the material retrieving station. The blocking support assembly drives a block through the material transmission mechanism to extend above the material tray to block the material tray in transit. At the same time, the supporting cylinder drives the material suction nozzle through the material tray to lift the screen placed in the material tray upward, so that the material retrieving and unloading robot can remove the screen.

[0085] The silk-screen printing part of 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 defective product unloading 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 CCD detection mechanisms; the silk-screen printing station is provided with a silk-screen printing mechanism, and the defective product unloading station is provided with a unloading platform and a magazine mechanism; 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 screen position, 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 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 via 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 picked up by the unloading platform and transferred to the magazine mechanism for storage. The qualified screen after silk-screen printing is rotated back to the loading and unloading station via the screen, and is moved again by the material picking and placing arm and placed in the material tray on the material transmission mechanism.

[0086] 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.

[0087] 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.

[0088] 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 double-station screen printing machine, characterized by: The invention comprises a material transmission part (A) and a screen printing part (B), wherein the material transmission part (A) is arranged in a straight line direction, and the two ends of the material transmission part (A) are respectively connected to the upper and lower work stations, and the screen to be screen-printed is transmitted forward in a straight line through the material transmission part (A); the screen printing part (B) comprises two groups, which are respectively arranged on both sides of the material transmission part (A), and the screen on the material transmission part (A) is transferred to the two groups of screen printing parts (B) to complete the surface screen printing, and then returns to the material transmission part (A) and flows into the next work station; the material transmission part (A) is provided with a material transmission mechanism (3); the screen printing part (B) comprises a turntable (2), a material picking and placing arm (4), a code scanning rotation mechanism (6), a CC D detection mechanism (7), screen printing mechanism (8), unloading platform (9) and magazine mechanism (10), wherein the above-mentioned turntable (2) is horizontally rotatably arranged on the machine (1), and the turntable (2) is provided with loading and unloading stations, a first detection station, a screen printing station, a second detection station and a defective product unloading station along its periphery; the above-mentioned material taking and unloading arm (4) and the code scanning rotating mechanism (6) are respectively arranged at intervals on both sides of the loading and unloading stations; 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 screen printing mechanism (8) is arranged at the screen printing station; the above-mentioned unloading platform (9) is arranged at the defective product unloading station, and the magazine mechanism (10) is arranged at the end of the unloading platform (9); The material transmission mechanism (3) is arranged at the loading and unloading station, and the material transmission mechanism (3) includes a transmission support plate (30), a transmission belt, a limit plate, a tray assembly and a blocking material support assembly, wherein the transmission support plate (30) is arranged horizontally; the transmission belt is sleeved on the transmission support plate (30), and is tensioned by tensioning wheels rotatably arranged at both ends of the transmission support plate (30), and is driven by a transmission motor to move; a storage tray station and a material taking station are provided on the transmission support plate (30); the limit plate includes at least two limit plates, The plate is arranged at the side of the storage tray station in the vertical direction and extends vertically upward. The storage space formed between the limit plates is stacked with material trays; the above-mentioned tray placing assembly is arranged below the storage tray station, and the tray placing assembly clamps the stacked material trays from the bottom to the second layer of material trays and then lifts them upward, so that the lowest layer of material trays is transported forward to the material taking station via the conveyor belt; the above-mentioned blocking material supporting assembly is arranged at the material taking station, and the blocking material supporting assembly blocks the material trays moving in a straight line and lifts the screen in the material tray upward so that the material taking and placing lifting arm (4) can take out the screen.

2. The fully automatic double-station screen printing machine according to claim 1, characterized in that: The material taking and placing arm (4) comprises a material taking and placing support (41), a first drive motor (42), a connecting rocker (43), a second drive motor (44), a material taking shaft (45) and a material taking frame (46), wherein the material taking and placing support (41) is horizontally arranged on the machine (1); the first drive motor (42) is arranged on the material taking support (41); one end of the connecting rocker (43) is connected to the output shaft of the first drive motor (42) and extends horizontally; the second drive motor (44) is arranged on the upper part of the other end of the connecting rocker (43); The above-mentioned material taking shaft (45) is rotatably arranged in the second drive motor (44) and is connected to the output shaft of the second drive motor (44); the above-mentioned material taking frame (46) is a U-shaped frame structure, and a material taking trough (47) is provided on its side. A vacuum suction hole is opened on the support block at the bottom of the material taking trough (47) to adsorb and fix the screen in the material taking trough (47); the material taking frame (46) takes out the screen from the material transmission mechanism (3) and places it on the correction platform (5) set at the material taking and unloading station. After the correction platform (5) corrects the position of the screen, the screen is placed on the turntable (2).

3. The fully automatic double-station screen printing machine according to claim 2, characterized in that: 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 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 taking and unloading station; the code scanning rotation motor (62) is vertically arranged on the upper horizontal extension part of the code scanning support (61), and the output end is arranged downward; the 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 material suction seat (64) includes two pieces, 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 absorb the screen.

4. The fully automatic double-station screen printing machine according to claim 3, characterized in that: The CCD detection mechanism (7) includes a detection bracket (71), a CCD lens (72), a dust removal pipe (73) and a dust removal flat nozzle (74), wherein the detection bracket (71) is arranged at the first detection station and the second detection station; the 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 dust removal pipe (73) is connected to the top of the detection bracket (71) and extends downward to the bottom of the CCD lens (72); the dust removal flat nozzle (74) is connected to the lower end of the dust removal pipe (73), and the nozzle is set in the direction of the first detection station or the second detection station.

5. The fully automatic double-station screen printing machine according to claim 4, characterized in that: The screen printing mechanism comprises 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 and linearly; 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 arranged upward and is connected to the screen printing platform (83) to drive the screen printing platform (83) to move up and down.

6. The fully automatic double-station screen printing machine according to claim 5, characterized in that: 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.

7. The fully automatic double-station screen printing machine according to claim 6, characterized in that: The screen printing platform (83) includes a connecting seat (831), a screen printing screen (833), a platform cylinder (835), and a platform locking nut (836), wherein the connecting seat (831) includes two, the two connecting seats (831) are respectively connected to the two horizontally extending support plates at the bottom of the screen printing bracket (81), and the inner side wall of the connecting seat (831) is provided with a mounting notch (832); the screen printing screen (833) is horizontally arranged in the mounting notch (832) of the two connecting seats (831), and the screen printing A screen printing groove (834) is provided on the screen plate (833); the above-mentioned platform cylinder (835) includes two, the platform cylinder (835) is vertically arranged on the connecting seat (831), and the output end extends vertically downward into the installation groove (832) and is connected to the screen printing screen plate (833); the above-mentioned platform locking nut (836) includes at least two, the platform locking nut (836) is vertically arranged on the connecting seat (831) and is connected to the screen printing screen plate (833) so as to lock and fix the screen printing screen plate (833).

8. The fully automatic double-station screen printing machine according to claim 7, characterized in that: 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 returning component (825), wherein the 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 screen printing lifting cylinder (822) is vertically arranged on the side wall of the screen printing seat (821); the screen printing lifting seat (823) includes two, and the two screen printing lifting seats (823) are slidably connected to the side wall of the screen printing seat (821) along the vertical direction and are connected to the output end of the screen printing lifting cylinder (822); the ink scraping component (824) and the ink returning component (825) are respectively arranged on the two screen printing lifting seats (823).

9. The fully automatic double-station screen printing machine according to claim 8, characterized in that: 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 ink scraping connecting plate (8241) is connected to the screen printing lifting seat (823); the ink scraping support (8243) is arranged below the ink scraping connecting plate (8241), and the ink scraping support (8243) is provided with two ink scraping support ears (8242), and the two ink scraping support ears (8242) are arranged at intervals; the lower end of the ink scraping connecting plate (8241) is rotatably connected to the two ink scraping support ears (8242); the lower part of the ink scraping support (8243) is provided with an ink scraping installation groove (8244); the ink scraping plate (8245) is arranged in the ink scraping installation groove (8244) and extends downward to the bottom of the ink scraping installation groove (8244).

10. The fully automatic double-station screen printing machine according to claim 9, characterized in that: 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).

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