Double blade printing machine

Abstract

The present invention discloses a double-knife group printing machine, including: a printing frame, a printing scraper correction device, a visual detection device, a safety light curtain, a lifting and feeding device, a feeding and conveying lifting device, a light source, casters with adjustment blocks, a touch panel, a display screen and other safety baffles. Through the above method, the double-knife group printing machine of the present invention solves the problems of printing quality and printing speed of photovoltaic module conductive glue, improves equipment production capacity, meets the production line cycle time, makes conductive glue printing more accurate and more uniform, ensures the qualified rate of printing, further improves product yield, reduces costs, improves equipment production capacity, improves employee work efficiency, and creates economic value for the enterprise.

Description

Technical Field

[0001] The invention relates to the field of conductive glue printing equipment for solar cell components, in particular to a double-knife group printing machine. Background Art

[0002] MWT photovoltaic modules are photovoltaic modules based on a new metal foil circuit design. The cells are interconnected through conductive glue and conductive core boards to form a complete conductive loop. MWT back-contact battery technology is to introduce the front electrode of the cell to the back of the cell by laser drilling of the front main grid, and combine the silver paste to gather the current from the front to the back. The positive and negative electrodes on the back are distributed in a point shape, and the positive and negative electrode points on the back are connected to the conductive core board through conductive glue to form a conductive loop.

[0003] Since the hole diameter of the electrode point on the back of the MWT cell is less than 200 microns, and the conductive glue is an adhesive that has both conductive and adhesive properties, if the conductive glue is not printed properly, the cell electrode point and the glue point will not correspond, resulting in poor contact, which will lead to product degradation. In addition, the current printing equipment has a slow printing speed, resulting in low equipment production capacity. Therefore, it is necessary to provide a device that can meet the needs of fast and accurate printing of MWT conductive glue. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a double-knife group printing machine, which solves the problems of printing quality and printing speed of conductive glue for photovoltaic modules, has the advantages of high reliability, precise positioning, compact structure, etc., and at the same time has broad market prospects in the application and popularization of conductive glue printing equipment for solar cell modules.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is:

[0006] A double-knife group printing machine is provided, which comprises: a printing frame, a printing scraper correction device for fixing, correcting and scraping the product, a lifting and feeding device, and a loading, conveying and lifting device for conveying and lifting the product. The printing scraper correction device is provided with a lifting and feeding device for driving the lifting movement thereof, and a loading, conveying and lifting device is provided below the printing scraper correction device.

[0007] In a preferred embodiment of the present invention, the loading conveying and lifting device includes a loading adsorption accompanying tooling plate, a loading adsorption accompanying tooling plate conveying line for conveying the loading adsorption accompanying tooling plate, and an accompanying tooling plate lifting device. The loading adsorption accompanying tooling plate includes a loading accompanying tooling plate frame, an accompanying tooling plate panel, a concave cone hole connecting block, and a positioning concave cone hole. The accompanying tooling plate panel is arranged on the loading accompanying tooling plate frame, and the positioning concave cone hole is arranged on the bottom surface of the concave cone hole connecting block. The upper part of the concave cone hole connecting block is connected to the loading accompanying tooling plate frame in a lifting manner.

[0008] The accompanying tooling plate lifting device includes an accompanying tooling plate lifting frame, a lifting cylinder, and a positioning convex cone pin. The positioning convex cone pin, which cooperates with the positioning concave cone hole to position and connect the accompanying tooling plate for feeding and adsorption, is arranged on the accompanying tooling plate lifting frame. The lifting cylinder is contacted and connected with the spherical concave surface on the accompanying tooling plate lifting frame through a spherical floating structure to drive the accompanying tooling plate lifting frame to rise and fall. The spherical floating structure is provided with an adjusting screw hole, which is threadedly connected to the adjusting screw hole through the accompanying tooling plate lifting frame to adjust the height of the accompanying tooling plate lifting frame so that the accompanying tooling plate lifting frame remains at a uniform level after being lifted.

[0009] In a preferred embodiment of the present invention, the printing scraper correction device includes a printing frame, a double-blade scraper device, a pressing correction device, and a displacement feeding device. The displacement feeding device is arranged in the printing frame, and one or more groups of the double-blade scraper devices are connected to the displacement feeding device to move back and forth in the printing frame. Two groups of pressing correction devices are relatively slidably arranged in the printing frame, and the pressing correction devices are respectively arranged on both sides of the double-blade scraper device to adjust the spacing between the pressing correction devices according to the actual size of the screen, wherein the scraper support plates for supporting the screen are fixedly / liftably arranged at both ends of the printing frame.

[0010] In a preferred embodiment of the present invention, the double-blade scraper device includes a scraper support frame, a scraper, a scraper lifting cylinder, a scraper lifting guide mechanism, and a scraper connecting mechanism. The scraper includes a front silk screen scraper and a rear silk screen scraper. The scraper support frame is movably connected to the scraper through the scraper lifting guide mechanism and the scraper connecting mechanism. The scraper lifting cylinder is arranged on the scraper support frame and drives the scraper to move up and down through the scraper connecting mechanism. The two ends of the scraper support frame are fixedly connected to the displacement feeding device.

[0011] In a preferred embodiment of the present invention, the scraper lifting guide mechanism includes a scraper lifting guide seat and a scraper lifting guide shaft. The scraper lifting guide seat is fixedly arranged on the scraper support frame, the lower end of the scraper lifting guide shaft is connected to the scraper connecting mechanism, and the upper end thereof is slidably arranged in the scraper lifting guide seat.

[0012] In a preferred embodiment of the present invention, the scraper connecting mechanism includes a scraper connecting block and a scraper connecting plate, the scraper connecting block is connected to the scraper lifting guide shaft and the scraper lifting cylinder, the scraper connecting plate is connected to the scraper connecting block, and the scraper is connected to the scraper connecting plate.

[0013] In a preferred embodiment of the present invention, the belt clamping device for fixedly connecting with the displacement feeding device is provided at both ends of the scraper support frame, and the belt clamping device includes a clamping plate connecting plate, an upper clamping plate and a lower clamping plate, the clamping plate connecting plate is connected to the scraper support frame, the upper clamping plate is arranged on the clamping plate connecting plate, the lower clamping plate and the upper clamping plate are detachably connected, the upper clamping plate and the lower clamping plate are respectively located on the upper and lower sides of the displacement feeding belt to clamp and fix the displacement feeding belt, a displacement slider is provided on the clamping plate connecting plate, and a displacement slide rail slidably connected to the displacement slider is provided on the inner upper part of the printing frame, so that the displacement feeding device drives the scraper support frame to move back and forth along the displacement slide rail.

[0014] In a preferred embodiment of the present invention, the pressing and correcting device includes a pressing and correcting support frame, a pressing drive cylinder, a pressing plate, a pressing and correcting connecting block, a screen support plate, and a support plate adjustment drive device. The pressing and correcting support frame is provided with the pressing drive cylinder, and the pressing drive cylinder is connected to the pressing plate to drive the pressing plate to move up and down to press the screen plate. The pressing and correcting connecting block is slidably arranged on the pressing and correcting support frame, and the screen support plate is connected to the pressing and correcting connecting block. The two ends of the pressing and correcting support frame are slidably connected to the displacement slide rail through a slider, and the support plate adjustment drive device drives the pressing and correcting support frame to move back and forth along the displacement slide rail to adjust the spacing between the relatively arranged screen support plates.

[0015] In a preferred embodiment of the present invention, the pallet adjustment driving device includes a pallet adjustment rack, a pallet adjustment handwheel, a bevel gear set, a pallet adjustment adjustment block, a pallet adjustment fixing plate, a locking drive cylinder and a locking rack. The pallet adjustment adjustment block is arranged at both ends of the clamping and correcting support frame. The pallet adjustment adjustment block and the pallet adjustment fixing plate are slidably connected with the displacement slide rail through a slider. The pallet adjustment handwheel is arranged on the pallet adjustment fixing plate and drives the bevel gear set to rotate. The bevel gear set is connected to a screw rod rotatably arranged on the pallet adjustment fixing plate to drive the screw rod to rotate. The nut on the screw rod is connected to the pallet adjustment adjustment block, so that the screw rod drives the pallet adjustment adjustment block to move back and forth through the nut. The pallet adjustment rack is fixedly arranged on the printing frame. The locking drive cylinder is arranged on the pallet adjustment fixing plate. The locking drive cylinder drives the locking rack to engage with the pallet adjustment rack to achieve the purpose of the locking rack.

[0016] In a preferred embodiment of the present invention, a wire mesh support plate deviation correcting device is provided on the wire mesh support plate.

[0017] The beneficial effects of the present invention are: meeting the production line cycle time, making the conductive glue printing more accurate and more uniform, ensuring the printing qualification rate, further improving the product yield, reducing costs, increasing equipment capacity, improving employee work efficiency, and creating economic value for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0019] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of a double-knife group printing machine of the present invention;

[0020] Figure 2 It is a structural schematic diagram of a double-knife scraping device in a preferred embodiment of a double-knife printing machine of the present invention;

[0021] Figure 3 It is a structural schematic diagram of a printing scraper glue deviation correction device in a preferred embodiment of a double-knife group printing machine of the present invention;

[0022] Figure 4 It is a structural schematic diagram of a pressing and correcting device in a preferred embodiment of a double-knife group printing machine of the present invention;

[0023] Figure 5It is a schematic diagram of the overall structure of a printing scraper glue correction device in a preferred embodiment of a double-knife group printing machine of the present invention;

[0024] Figure 6 It is a structural schematic diagram of a feeding, conveying and lifting device in a preferred embodiment of a double-knife group printing machine of the present invention;

[0025] Figure 7 It is a partial structural schematic diagram of a feeding, conveying and lifting device in a preferred embodiment of a double-knife group printing machine of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of a feeding, conveying and lifting device in a preferred embodiment of a double-knife group printing machine of the present invention from a bottom view;

[0027] Fig. 9 It is a side structural schematic diagram of a feeding, conveying and lifting device in a preferred embodiment of a double-knife group printing machine of the present invention;

[0028] Fig.10 The present invention is a schematic diagram of the position structure of a scraper support plate in a preferred embodiment of a double-blade printing machine. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-10 , the embodiment of the present invention includes:

[0031] A double-knife group printing machine, whose structure includes: a printing frame 1009, a printing scraper correction device, a visual detection device 1012, a safety light curtain 1013, a lifting and feeding device, a loading and conveying lifting device, a light source 1019, casters with adjustment blocks 1020, a touch panel 1021, a display screen 1022 and other safety baffles.

[0032] The printing scraper correction device is provided with a lifting and feeding device to drive the lifting and lowering movement thereof, a feeding and conveying lifting device is provided below the printing scraper correction device, and a visual detection device is provided above the printing scraper correction device. Light sources are provided above and on both sides of the printing frame, a safety light curtain is provided at the column position of the printing frame, a touch panel is provided on one side of the printing frame, safety baffles are provided around the printing frame, and casters with adjustment blocks are provided at the bottom of the printing frame.

[0033] The loading, conveying and lifting device includes a loading, adsorption and accompanying tooling plate 1017, a loading, adsorption and accompanying tooling plate conveying line 1016 for conveying the loading, adsorption and accompanying tooling plate, and an accompanying tooling plate lifting device 1018.

[0034] The feeding and adsorption accompanying tooling plate conveyor line includes a reducer 1059 as an output power, and transports the feeding and adsorption accompanying tooling plate through shafts, pulleys and belts.

[0035] The loading and adsorption accompanying tooling plate includes a loading and adsorption accompanying tooling plate frame 1060 , an accompanying tooling plate panel 1061 , a flipping and fixing block 1064 , a fixing profile frame, a side protection strip, and a positioning concave cone hole 1065 .

[0036] The accompanying tooling board panel is arranged on the loading accompanying tooling board frame, and the accompanying tooling board panel is sprayed with Teflon coating to increase wear resistance, and the positioning concave cone hole is arranged on the bottom surface of the loading accompanying tooling board frame. Among them, the loading adsorption accompanying tooling board can adopt vacuum adsorption, electrostatic adsorption or ice layer fixation to position and fix the product.

[0037] The frame structure of the loading accompanying tooling plate frame can reduce the weight of the accompanying tooling plate, and the whole plate can be processed to remove the part that does not affect the strength, or a foam aluminum plate can be used.

[0038] The flipping fixed blocks are arranged on both sides of the loading accompanying tooling plate frame to serve as the clamping action points when the loading accompanying tooling plate is flipped. The fixed profile frame is arranged on both sides of the bottom of the loading accompanying tooling plate frame. The side protection strip is arranged on the outside of the flipping fixed blocks and / or the fixed profile frame to absorb part of the impact force when there is a collision during movement, so that the back plate does not move as much as possible.

[0039] The accompanying tooling plate lifting device is used to lift the accompanying tooling plate, and its structure includes an accompanying tooling plate lifting frame 1066, an accompanying tooling plate lifting frame lifting cylinder 1071, and a positioning convex cone pin 1067.

[0040] The positioning convex cone pin that cooperates with the positioning concave cone hole to position and connect the loading adsorption accompanying tooling plate is set on the accompanying tooling plate lifting frame. The concave cone hole and the convex cone pin can have a larger correction range than the cylindrical pin, and it is smoother when disengaged. Compared with the method of one fixed pin + one movable pin, the repeat positioning accuracy will be better. Four accompanying tooling plate lifting frame lifting cylinders are set at the four corners of the bottom of the lifting frame. The power output end of each accompanying tooling plate lifting frame lifting cylinder is connected to a spherical floating structure 1068 (the spherical structure at the top of the spherical floating structure is in contact with the spherical concave surface on the accompanying tooling plate lifting frame). The frame will not get stuck when it is raised, making it smoother when driving the accompanying tooling plate lifting frame to rise. There is an adjustment screw hole on the top of the spherical floating structure. The screw passes through the accompanying tooling plate lifting frame and is threadedly connected to the adjustment screw hole. The locking screw is used to fine-tune the lifting height so that the fine-tuning frame remains at a uniform level after being lifted. Among them, the spherical floating structure can adopt existing structural equipment.

[0041] There are two implementation methods for loading materials, as follows:

[0042] Implementation Method 1

[0043] When the loading adsorption accompanying tooling plate is transmitted from the loading adsorption accompanying tooling plate conveyor line to the deceleration sensing sensor, it starts to decelerate, and then runs slowly at a low speed until the jacking position sensor light comes on and stops. The positioning convex cone pin enters the positioning concave cone hole under the action of the jacking cylinder of the accompanying tooling plate jacking frame, and the loading adsorption accompanying tooling plate is positioned with the help of the cone hole to correct the position deviation during transmission and stopping. After the process is completed, the jacking cylinder of the accompanying tooling plate jacking frame descends, and the accompanying tooling plate falls back to the transmission line, and the positioning convex cone pin disengages from the positioning concave cone hole.

[0044] Implementation Method 2

[0045] The servo motor is directly used to drive the conveyor line of the loading and adsorption accompanying tooling plate to operate, so that the loading and adsorption accompanying tooling plate and the accompanying tooling plate stop at the required position, and the positioning convex cone pin enters the positioning concave cone hole under the action of the cylinder. With the help of the cone hole, the accompanying tooling plate is positioned to correct the position deviation during transmission and stopping. After the process is completed, the cylinder descends and the accompanying tooling plate falls back to the transmission line, and the positioning convex cone pin disengages from the positioning concave cone hole.

[0046] The printing scraper correction device includes a printing frame 1023, a double-blade scraper device 1010, a pressing correction device 1011, and a displacement feeding device. The displacement feeding device is arranged in the printing frame. One or more groups of the double-blade scraper devices are connected to the displacement feeding device to move back and forth in the printing frame. The double-blade scraper device can effectively avoid the problems of uneven scraping and glue leakage during scraping, thereby ensuring the quality of scraping. Two groups of pressing correction devices are relatively slidably arranged in the printing frame, and the pressing correction devices are respectively arranged on both sides of the double-blade scraper device to adjust the spacing between the pressing correction devices according to the actual size of the screen so as to support the screen. It is suitable for a variety of screen types and meets the needs of screens of various sizes.

[0047] A scraper support plate 1069 may be provided at one or both ends of the printing frame, and the scraper support plate is located below the starting / ending position of the double-blade scraper device. The bottom of the scraper support plate is connected to a support plate lifting drive device, and the support plate lifting drive device drives the scraper support plate to move up and down (until it is flush with the loading adsorption accompanying tooling plate), so that during printing, the scraper support plate can provide support below the printing start point of the screen to offset part of the pressure of the scraper on the screen and extend the life of the screen.

[0048] Among them, the pallet lifting drive device includes a pallet lifting cylinder. In order to further improve the lifting stability of the scraper pallet, a pallet lifting guide rod is movably connected to the scraper pallet.

[0049] The double-blade scraper device 1010 includes a scraper support frame 1024, a scraper, a scraper lifting cylinder 1025, a scraper lifting guide mechanism 1028, a scraper connecting mechanism, and a belt clamping device. The scraper includes one or more of a front screen printing scraper 1026 and a rear screen printing scraper 1027. The scraper support frame is movably connected to the scraper through the scraper lifting guide mechanism and the scraper connecting mechanism. The scraper lifting cylinder is arranged on the scraper support frame and drives the scraper to move up and down through the scraper connecting mechanism. The belt clamping device for fixedly connecting to the displacement feeding device is arranged at both ends of the scraper support frame.

[0050] The scraper lifting cylinder is connected with a pressure regulating device. Two relatively superior pressure regulating methods are provided here. One method is to set a precision pressure regulating valve, and the other method is to set a proportional control valve. The precision pressure regulating valve can accurately control the pressure, while the proportional control valve can regulate the pressure and compensate the pressure. The purpose of both is to ensure the quality of the scraping glue and accurate scraping glue. The two methods can be selected according to the needs.

[0051] The scraper lifting guide mechanism includes a scraper lifting guide seat and a scraper lifting guide shaft. The scraper lifting guide seat is fixedly arranged on the scraper support frame. The lower end of the scraper lifting guide shaft is connected to the scraper connecting mechanism, and the upper end thereof is slidably arranged in the scraper lifting guide seat.

[0052] The scraper connecting mechanism includes a scraper connecting block 1029 and a scraper connecting plate 1030. The scraper connecting block is connected to the scraper lifting guide shaft and the scraper lifting cylinder. The scraper connecting plate is connected to the scraper connecting block. The scraper is connected to the scraper connecting plate.

[0053] The displacement feed device includes a displacement feed servo motor 1036, a displacement feed belt 1037, a displacement feed shaft 1038, a displacement feed coupling, and a displacement feed pulley 1039. The displacement feed belt is wrapped around the displacement feed pulley, and the displacement feed servo motor is connected to the displacement feed pulley through the displacement feed shaft and the displacement feed coupling to drive the displacement feed belt to move.

[0054] The output power is provided by the displacement feed servo motor, and the power is transmitted through the displacement feed shaft, displacement feed coupling, displacement feed pulley and displacement feed belt, so as to achieve the purpose of precise reciprocating motion of the double-blade scraper device on the screen, and no tilting or offset will occur during the transmission process.

[0055] The belt clamp device includes a clamp connecting plate 1031, an upper clamp 1032 and a lower clamp 1033, the clamp connecting plate is connected to the scraper support frame, the upper clamp is arranged on the clamp connecting plate, the lower clamp is detachably connected to the upper clamp, and the upper clamp and the lower clamp are respectively located on the upper and lower sides of the displacement feed belt to clamp and fix the displacement feed belt.

[0056] In order to further improve the stability and accuracy during displacement, a displacement slider 1034 is provided on the splint connecting plate, and a displacement slide rail 1035 slidably connected to the displacement slider is provided on the inner upper portion of the printing frame, so that the displacement feeding device can drive the scraper support frame to move back and forth along the displacement slide rail.

[0057] The pressing and correcting device includes a pressing and correcting support frame 1040, a pressing driving cylinder 1041, a pressing plate 1042, a pressing and correcting connecting block 1043, a screen support plate 1044, and a manual or automatic support plate adjustment driving device.

[0058] The pressing and correcting support frame is provided with the pressing driving cylinder, and the pressing driving cylinder is connected with the pressing plate to drive the pressing plate to move up and down to press the mesh plate, the pressing and correcting connecting block is slidably arranged on the pressing and correcting support frame, the wire mesh support plate is connected with the pressing and correcting connecting block, and the two ends of the pressing and correcting support frame are slidably connected with the displacement slide rail through a slider, and the support plate adjustment driving device drives the pressing and correcting support frame to move back and forth along the displacement slide rail to adjust the distance between the relatively arranged wire mesh support plates to meet the use requirements of different mesh plates.

[0059] The pallet adjustment drive device includes a pallet adjustment gear 1045, a pallet adjustment rack 1046, a pallet adjustment handwheel 1047 (other automatic drive devices may also be used), a bevel gear set 1048, a pallet adjustment positioning block 1051, a pallet adjustment fixing plate 1073, a locking drive cylinder 1049 and a locking rack 1050. The pallet adjustment positioning block is arranged at both ends of the clamping and correcting support frame. The pallet adjustment positioning block and the pallet adjustment fixing plate are slidably connected with the displacement slide rail through a slider. The pallet adjustment handwheel is arranged on the pallet adjustment fixing plate and drives the bevel gear set to rotate. The horizontal rotating gear in the bevel gear set The wheel is connected to a screw rod rotatably set on the pallet adjustment fixing plate to drive the screw rod to rotate, and the nut on the screw rod is connected to the pallet adjustment and positioning block, so that the screw rod drives the pallet adjustment and positioning block to move back and forth through the nut, thereby adjusting the position of the entire clamping and correcting support frame, the pallet adjustment gear is rotatably set on the pallet adjustment and positioning block, the pallet adjustment rack is fixedly set on the printing frame, the pallet adjustment gear and the pallet adjustment rack are meshed for movement, the locking drive cylinder is set on the pallet adjustment fixing plate, and the locking drive cylinder drives the locking rack and the pallet adjustment rack to mesh to achieve the purpose of the locking rack.

[0060] During adjustment, first use the locking rack and the pallet adjustment rack to lock, then turn the pallet adjustment handwheel to control the meshing rotation of the bevel gear group, so that the pallet adjustment gear and the pallet adjustment rack are controlled to move in a straight line. At the same time, the bevel gear group drives the pallet adjustment and positioning block to move back and forth through the lead screw and nut, so that the entire clamping and correcting device moves as a whole under the action of the displacement slide rail, and further adjusts the distance between the two pallets to achieve the purpose of adapting to different screen sizes.

[0061] A screen support plate correction device is connected to one end of the screen support plate, which is used to correct the screen plate. The screen support plate correction device includes a correction adjustment drive device, a correction adjustment screw 1053, a correction bending plate 1054, and a correction bearing seat 1055. The correction bearing seat, the correction adjustment drive device is arranged at the outer end of the correction adjustment screw, and the correction bearing seat connected to the screen support plate moves back and forth on the correction adjustment screw. The support plate adjustment and positioning block is rotatably connected to the correction adjustment screw (it can also play the role of supporting the screw), and the correction bending plate is connected to the bottom of the correction adjustment and positioning block. The correction adjustment drive device drives the correction adjustment screw to rotate, so that the correction bearing seat drives the screen support plate to fine-tune the movement to complete the correction of the screen support plate.

[0062] Two correction methods are provided here. One is manual correction. The correction adjustment drive device adopts a correction adjustment hand wheel 1052. By adjusting the correction adjustment hand wheel, the correction bending plate is fine-tuned to achieve manual correction of the screen. The second is that the correction adjustment drive device adopts a motor, and the camera of the visual device is used to take pictures to detect the position of the screen glue points, and then feedback is given to the motor to achieve automatic and precise correction of the screen.

[0063] The lifting and feeding device includes four linkage devices 1015, a lifting and feeding guide seat 1014, and a four-column lifting device 1056. The lifting and feeding guide seat 1014 is arranged on the printing machine frame. One end of the four-column lifting device is connected to the four linkage devices, and the other end thereof passes through the lifting and feeding guide seat and is connected to the four corners of the printing frame. The four linkage devices are simultaneously connected to multiple four-column lifting devices and transmit, so as to simultaneously drive the lifting movement of the printing frame through the four-column lifting devices.

[0064] The four linkage devices use four linkage servo motors 1057 as output power. The four linkage servo motors are connected to the first-level commutator through a first-level coupling, and then connected to the first-level commutator through a transmission shaft and a second-level coupling, and then connected to the four-column lifting device through a shaft and a third-level coupling to drive the four-column lifting device to lift and lower, completing the four-corner transmission. The purpose of the four linkage devices is to ensure that the same height is lowered when the screen is lowered, so that the screen plane is on the same horizontal plane, and also to ensure that the screen is lifted at the same time when the screen is raised, to avoid the screen lifting being asynchronous and causing glue point overflow, thereby ensuring printing quality.

[0065] The four-column lifting device provides two lifting structures, one is driven by a gear rack, and the other is driven by a lifting screw device (the nut is driven to rotate by four linkage devices, so that the screw moves up and down). The four-column lifting device can be connected to the printing frame through a guide shaft 1058, and the guide shaft is slidably connected to the lifting feed guide seat to control the smooth lifting of the printing scraper correction device.

[0066] The working steps of a double-knife printing machine are as follows:

[0067] (1) The feeding adsorption accompanying tooling plate conveyor line on the equipment starts to run. The feeding adsorption accompanying tooling plate carries the back plate and is transported on the feeding adsorption accompanying tooling plate conveyor line. The accompanying tooling plate is in place, and the accompanying tooling plate lifting device lifts the feeding adsorption accompanying tooling plate and inflates it. The visual device takes a photo to detect whether the Mark point on the back plate and the Mark point on the screen mesh are aligned. If not, the camera feeds back to the motor and starts to correct the screen. At the same time, the four linkage devices work, driving the four-column lifting device to control the screen to descend to a height that fits the back plate but does not put force on the back plate. The preliminary preparations for scraping glue are completed.

[0068] (2) When printing starts, the two front screen printing scrapers of the double blade group move upward, and the two rear screen printing scrapers move downward to contact the screen. The conductive glue is squeezed and scraped by the rear screen printing scrapers through the mesh holes of the screen and imprinted on the back plate to form the required glue points; when the rear screen printing scrapers push the conductive glue to complete the scraping, the rear screen printing scrapers move upward, the front screen printing scrapers move downward, and return to the original position. The four linkage devices are started, driving the four-column lifting device to control the screen to rise.

[0069] The feeding adsorption accompanying tooling board conveyor line is running, and the feeding adsorption accompanying tooling board carries the printed backing board to transfer, so that the next backing board moves to the predetermined position to wait for printing. The visual device takes a photo to detect whether the Mark point on the backing board and the Mark point on the screen mesh are aligned. If not, the camera feeds back to the motor to start correcting the screen.

[0070] (3) When printing backward, the two rear screen printing scrapers of the double blade group move upward, and the two front screen printing scrapers move downward to contact the screen. The conductive glue is squeezed and scraped by the front screen printing scrapers through the mesh holes of the screen to form the required glue dots on the back plate; when the rear screen printing scraper pushes the conductive glue to complete the scraping, the rear screen printing scraper moves upward, the front screen printing scraper moves downward, and returns to the original position. The four linkage devices are started, driving the four-column lifting device to control the rise of the screen. The feeding adsorption accompanying tooling plate conveyor line runs, and the feeding adsorption accompanying tooling plate carries the printed back plate to transfer, so that the next back plate is moved to the predetermined position to wait for printing. The visual device takes pictures to detect whether the Mark point on the back plate and the Mark point on the screen are aligned. If not, the camera feeds back to the motor and starts to correct the screen.

[0071] (4) Repeating steps (2) to (3) can achieve rapid and continuous completion of the conductive adhesive printing process.

[0072] When traveling, the purpose of printing is achieved through the rear screen printing scraper, and when returning, the purpose of printing is achieved through the front screen printing scraper, that is, the purpose of printing can be achieved in one go and one return. Compared with the traditional process of only printing once in one go and one return, the double knife group is used to ensure the printing quality, meet the production line rhythm, make the scraping more uniform, and improve the scraping efficiency. The printing efficiency is greatly improved, and during printing, the pressure changes of the front and rear screen printing scrapers can be adjusted in two ways (1. Precision pressure regulating valve pressure regulation 2. Proportional control valve control) to adjust the pressure between the scraper and the screen in real time, ensure the stability of the pressure, and effectively improve the uniformity of the scraping and printing accuracy during printing, and the printing quality. When the back plate is in place, the visual device takes pictures, detects the Mark points of the back plate and the screen plate, and feeds back to the motor to accurately correct the screen plate.

[0073] The beneficial effects of the double-knife printing machine of the present invention are:

[0074] (1) Improve the stability, speed and efficiency of printing, thereby improving the quality of scraping glue;

[0075] (2) Improve the adaptability of the equipment and make it suitable for a variety of screen sizes;

[0076] (3) Improve the accuracy of equipment and achieve more precise printing.

[0077] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A double blade printing machine, characterized in that: include: A printing frame, a printing scraper correction device for fixing, correcting and printing scraper glue, a lifting and feeding device, and a feeding and lifting device for conveying and lifting products. The printing scraper correction device is provided with a lifting and feeding device for driving the lifting and lowering movement thereof, and a feeding and lifting device is provided below the printing scraper correction device; The loading and conveying lifting device includes a loading and adsorption accompanying tooling plate, a loading and adsorption accompanying tooling plate conveying line for conveying the loading and adsorption accompanying tooling plate, and an accompanying tooling plate lifting device. The loading and adsorption accompanying tooling plate includes a loading and adsorption accompanying tooling plate frame, an accompanying tooling plate panel, a concave cone hole connecting block, and a positioning concave cone hole. The accompanying tooling plate panel is arranged on the loading and adsorption accompanying tooling plate frame, and the positioning concave cone hole is arranged on the bottom surface of the concave cone hole connecting block. The upper part of the concave cone hole connecting block is liftably connected to the loading and adsorption accompanying tooling plate frame. The accompanying tooling plate lifting device includes an accompanying tooling plate lifting frame The lifting frame comprises a frame, a lifting cylinder, and a positioning convex cone pin. The positioning convex cone pin cooperates with the positioning concave cone hole to position and connect the accompanying tooling plate for feeding adsorption. The lifting cylinder is connected to the spherical concave surface on the accompanying tooling plate lifting frame through a spherical floating structure to drive the accompanying tooling plate lifting frame to rise and fall. The spherical floating structure is provided with an adjusting screw hole. The adjusting screw passes through the accompanying tooling plate lifting frame and is threadedly connected with the adjusting screw hole to adjust the height of the accompanying tooling plate lifting frame, so that the accompanying tooling plate lifting frame remains at a uniform level after being lifted. The printing scraper correction device comprises a printing frame, a double-blade scraper device, a pressing correction device, and a displacement feeding device. The displacement feeding device is arranged in the printing frame. One or more groups of the double-blade scraper devices are connected to the displacement feeding device to move back and forth in the printing frame. Two groups of pressing correction devices are relatively slidably arranged in the printing frame, and the pressing correction devices are respectively arranged on both sides of the double-blade scraper device to adjust the spacing between the pressing correction devices according to the size of the actual screen plate. The two ends of the printing frame are fixedly / liftably provided with scraper support plates for supporting the screen plate; The double-blade scraper device includes a scraper support frame, a scraper, a scraper lifting cylinder, a scraper lifting guide mechanism, and a scraper connecting mechanism. The scraper includes a front screen printing scraper and a rear screen printing scraper. The scraper support frame is movably connected to the scraper through the scraper lifting guide mechanism and the scraper connecting mechanism. The scraper lifting cylinder is arranged on the scraper support frame and drives the scraper to move up and down through the scraper connecting mechanism. Both ends of the scraper support frame are fixedly connected to the displacement feeding device. The scraper lifting guide mechanism comprises a scraper lifting guide seat and a scraper lifting guide shaft. The scraper lifting guide seat is fixedly arranged on the scraper support frame. The lower end of the scraper lifting guide shaft is connected to the scraper connecting mechanism, and the upper end thereof is slidably arranged in the scraper lifting guide seat. The scraper connecting mechanism comprises a scraper connecting block and a scraper connecting plate, wherein the scraper connecting block is connected to the scraper lifting guide shaft and the scraper lifting cylinder, the scraper connecting plate is connected to the scraper connecting block, and the scraper is connected to the scraper connecting plate; Belt clamping devices for fixedly connecting to the displacement feeding device are arranged at both ends of the scraper support frame, the belt clamping device comprises a clamping plate connecting plate, an upper clamping plate and a lower clamping plate, the clamping plate connecting plate is connected to the scraper support frame, the upper clamping plate is arranged on the clamping plate connecting plate, the lower clamping plate and the upper clamping plate are detachably connected, the upper clamping plate and the lower clamping plate are respectively located on the upper and lower sides of the displacement feeding belt to clamp and fix the displacement feeding belt, a displacement slider is arranged on the clamping plate connecting plate, and a displacement slide rail slidably connected to the displacement slider is arranged on the printing frame, so that the displacement feeding device drives the scraper support frame to reciprocate along the displacement slide rail.

2. A double blade printing machine according to claim 1, characterized in that: The pressing and correcting device includes a pressing and correcting support frame, a pressing drive cylinder, a pressing plate, a pressing and correcting connecting block, a wire mesh support plate, and a support plate adjustment drive device. The pressing and correcting support frame is provided with the pressing drive cylinder, and the pressing drive cylinder is connected to the pressing plate to drive the pressing plate to move up and down to press the mesh plate. The pressing and correcting connecting block is slidably arranged on the pressing and correcting support frame, and the wire mesh support plate is connected to the pressing and correcting connecting block. The two ends of the pressing and correcting support frame are slidably connected to the displacement slide rail through a slider, and the support plate adjustment drive device drives the pressing and correcting support frame to reciprocate along the displacement slide rail to adjust the spacing between the relatively arranged wire mesh support plates.

3. A double blade printing machine according to claim 2, characterized in that: The pallet adjustment driving device comprises a pallet adjustment rack, a pallet adjustment handwheel, a bevel gear set, a pallet adjustment adjustment block, a pallet adjustment fixing plate, a locking driving cylinder and a locking rack. The pallet adjustment adjustment block is arranged at both ends of the pressing and correcting support frame. The pallet adjustment adjustment block and the pallet adjustment fixing plate are slidably connected with the displacement slide rail through a slider. The pallet adjustment handwheel is arranged on the pallet adjustment fixing plate and drives the bevel gear set to rotate. The bevel gear set is connected with a lead screw rotatably arranged on the pallet adjustment fixing plate to drive the lead screw to rotate. The nut on the lead screw is connected with the pallet adjustment adjustment block, so that the lead screw drives the pallet adjustment adjustment block to move back and forth through the nut. The pallet adjustment rack is fixedly arranged on the printing frame. The locking driving cylinder is arranged on the pallet adjustment fixing plate. The locking driving cylinder drives the locking rack to engage with the pallet adjustment rack to achieve the purpose of the locking rack.

4. A double blade printing machine according to claim 2, characterized in that: The screen support plate is provided with a screen support plate deviation correcting device.

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