A screen printing machine

Abstract

The present invention provides a screen printing machine, which relates to the technical field of printing machines and includes a machine platform, wherein a feeding mechanism, a screen printing mechanism, and a discharging mechanism are sequentially arranged on the machine platform according to the process steps; the feeding mechanism includes a first conveying assembly, which is provided with a positioning assembly and a first clamping assembly; the screen printing mechanism includes a second conveying assembly, which is provided with a lifting support assembly and a second clamping assembly; a screen frame fixing assembly is provided above the lifting support assembly; and a printing assembly is provided above the screen frame fixing assembly. The present invention is beneficial in that relevant structures are provided to position and clamp the printing material during the feeding and printing processes, resulting in an ingenious structure and a high degree of automation, which helps improve printing quality.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, in particular to a screen printing machine. Background Art

[0002] A screen printer, also known as a silk screen printer, is a type of printing press that uses a screen printing plate to print. A screen printer is a machine used to print text and images, and is a general term for machines or equipment used to produce printed products. Screen printers are a representative type of stencil printer. In addition to silk, screens can be made from materials such as nylon, copper, steel, and stainless steel. They can be categorized as flat screen printers, curved screen printers, and rotary screen printers.

[0003] Screen printing machines are widely used and can meet the printing needs of a variety of products, making them popular among manufacturers. However, current screen printing machines generally have a simple structure and lack the ability to position and fix the substrate, which affects the printing effect. Summary of the Invention

[0004] The present invention overcomes the shortcomings of the prior art and provides a screen printing machine. During the feeding and printing processes, relevant structures are provided to position and clamp the printing material. The structure is ingenious and the degree of automation is high, which helps to improve the printing quality.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] A screen printing machine includes a machine platform, on which a feeding mechanism, a screen printing mechanism and a discharging mechanism are arranged in sequence according to the process steps; the feeding mechanism includes a first conveying component, which is provided with a positioning component and a first clamping component; the screen printing mechanism includes a second conveying component, which is provided with a lifting support component and a second clamping component; a screen frame fixing component is provided above the lifting support component; and a printing component is provided above the screen frame fixing component.

[0007] Furthermore, the first conveying assembly includes several first conveyor belts, and sensors and first cylinder seats are arranged between the first conveyor belts. The sensors and first cylinder seats are staggered with the first conveyor belts. A first cylinder is arranged on the first cylinder seat, and the first cylinder is hinged to one end of the connecting plate, and the other end of the connecting plate is hinged to the middle of the baffle rod, and the lower end of the baffle rod is hinged to the piston rod of the first cylinder.

[0008] Furthermore, the first clamping assembly is located on the left and right sides of the first conveyor belt, the first clamping assembly includes a first connecting plate, a second connecting plate, a third connecting plate and a first guide rail, the upper end of the second connecting plate is connected to the first connecting plate, and the lower end is connected to the third connecting plate, the first connecting plate and the third connecting plate are both arranged perpendicular to the second connecting plate, a plurality of centering stop wheels are rotatably arranged on the first connecting plate, the centering stop wheels are higher than the surface of the first conveyor belt, the third connecting plate is slidably connected to the first guide rail, the machine is reserved with a slot for the movement of the second connecting plate, including a sixth connecting plate, a sixth cylinder is provided on the sixth connecting plate, the piston rod of the sixth cylinder is connected to the joint bearing, the joint bearing is connected to the sixth connecting plate, and the sixth cylinder is electrically connected to the sensor.

[0009] Furthermore, the second conveying assembly includes a plurality of second conveyor belts, the second conveyor belts are connected to the first conveyor belt, the lifting support assembly includes a cross bracket, the cross bracket is connected to the lifting component, a plurality of knife bars are provided on the cross bracket, the lifting component includes a first motor and a worm gear reducer, the first motor is connected to the worm gear reducer, the worm gear reducer is provided with a lifting crankshaft, the lifting crankshaft is connected to one end of the gearbox connecting rod, the other end of the gearbox connecting rod is connected to one end of the lifting pendulum block, the The other end of the lifting pendulum block is connected to the lifting pendulum shaft, and both ends of the lifting pendulum shaft are rotatably connected to the machine platform, including a platform lifting clamp and a lifting support block. One end of the platform lifting clamp is connected and fixed to the lifting pendulum shaft, and the other end is hinged to the lower end of the lifting support block. The upper end of the lifting support block is connected to the cross bracket; a knife support bar cross beam is provided on the cross bracket, and a magnet is embedded in the knife support bar cross beam. A fourth connecting plate made of magnetic material is connected to the bottom of the knife support bar, and the fourth connecting plate is adsorbed and fixed on the magnet.

[0010] Furthermore, the second clamping assembly includes a left clamping part and a right clamping part, the left clamping part and the right clamping part have the same structure and are symmetrically located on both sides of the second conveyor belt, the left clamping part and the right clamping part include a slide, the slide is slidably connected to the second guide rail, a nut is provided on the slide, the nut is threadedly connected to the screw, the end of the screw is connected to the second motor, a support block is connected to the slide, and a support plate is provided on the side of the support block close to the knife support bar; the support block is connected to an angle iron plate, a second cylinder is provided on the angle iron plate, and the piston rod of the second cylinder is connected to the support plate.

[0011] Furthermore, it includes a front positioning bearing and a lifting guide groove, the front positioning bearing is rotatably connected to the brick blocking bar, the brick blocking bar is located next to the second conveyor belt, one end of the brick blocking bar is hinged to the brick blocking bar support frame, and the other end is connected to the brick blocking bar connecting plate, the lower end of the brick blocking bar connecting plate is connected to the second cylinder seat, and the second cylinder seat is hinged to the piston rod of the third cylinder; the lifting guide groove is connected to the cross bracket, the lifting guide groove is located next to the second conveyor belt, and the setting direction is the same as the transmission direction of the second conveyor belt, a slide is slidably provided on the lifting guide groove, and a rear positioning bearing is rotatably provided on the slide.

[0012] Furthermore, the mesh frame fixing assembly includes a third guide rail, on which a first fixing mechanism and a second fixing mechanism are slidably arranged, the first fixing mechanism and the second fixing mechanism having the same structure and being symmetrically arranged, the first fixing mechanism and the second fixing mechanism including a front wire mesh frame, a wire mesh mounting frame plate being connected above the front wire mesh frame, and the wire mesh mounting frame plate being slidably connected to the third guide rail; a screw adjustment assembly is connected to the first fixing mechanism and / or the second fixing mechanism; the screw adjustment assembly includes an adjustment handle, a wire mesh rod and an adjustment guide rod, the adjustment handle is connected to the wire mesh rod, the wire mesh rod is rotatably connected to the adjustment guide rod, the adjustment guide rod is connected and fixed to the adjustment pressure block, a connecting beam is connected to the third guide rail, and the wire mesh rod is threadedly connected to the connecting beam; and an adjusting screw sleeve is included, one end of the adjusting screw sleeve is rotatably connected to the adjustment guide rod, and the other end is threadedly connected to the wire mesh rod.

[0013] Furthermore, the printing assembly includes a machine head slide rail, a scraper seat block is slidably provided on the machine head slide rail, a fourth cylinder is provided on the scraper seat block, the piston rod of the fourth cylinder is connected to the scraper connecting plate, a scraper guide rod is slidably provided on the scraper connecting plate, the upper end of the scraper guide rod is connected to the scraper connecting plate, and the lower end is connected to the scraper.

[0014] Furthermore, the discharging mechanism includes a third conveying component, which is connected to the second conveying component, and the machine is provided with a channel, and the third conveying component is located above the channel. The third conveying component includes a bearing mounting seat and a lifting plate, and the bearing mounting seat is connected to the machine, and a connecting shaft is connected to the bearing mounting seat, and a fifth connecting plate is connected to the lifting plate, and the fifth connecting plate is connected to one end of the mounting plate, and a bearing is provided at the other end of the mounting plate, and the bearing is connected to the connecting shaft, and the lower surface of the lifting plate is connected to a cylinder head support, and the cylinder head support is connected to the cylinder head of the fifth cylinder.

[0015] Furthermore, sealing plates are provided on both sides of the channel, and the sealing plates are detachably connected to the machine platform.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] During the feeding and printing processes, the present invention is provided with relevant structures to position and clamp the printing material. The structure is ingenious and the degree of automation is high, which helps to improve the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and are used to explain the present invention together with the embodiments of the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is an overall diagram of the screen printing machine of the present invention;

[0020] Figure 2 It is a top view of the feeding mechanism;

[0021] Figure 3 is a first structural schematic diagram of a first clamping assembly;

[0022] Figure 4 is a second structural schematic diagram of the first clamping assembly;

[0023] Figure 5 It is a structural diagram of the first cylinder, the connecting plate and the stop rod;

[0024] Figure 6 It is a structural diagram of the silk screen mechanism;

[0025] Figure 7 It is a top view of the silk screen mechanism;

[0026] Figure 8 is a structural schematic diagram of the second clamping assembly;

[0027] Figure 9 It is a structural diagram of a slide plate, a support block and a support plate;

[0028] Figure 10 is a schematic structural diagram of the second conveying assembly;

[0029] Figure 11 It is a structural diagram of the cross bracket and lifting components;

[0030] Figure 12 It is a partial structural diagram of the lifting component;

[0031] Figure 13 It is a schematic diagram of the structure of the lifting crankshaft;

[0032] Figure 14 It is a structural diagram of the screen frame fixing component;

[0033] Figure 15It is a schematic diagram of the structure of the printed component;

[0034] Figure 16 It is a structural diagram of the discharging mechanism;

[0035] Figure 17 is a first structural schematic diagram of the third conveying assembly;

[0036] Figure 18 2 is a second structural schematic diagram of the third conveying component.

[0037] In the figure: 1-machine, 101-slot, 102-channel, 2-feeding mechanism, 3-screen printing mechanism, 4-discharging mechanism, 5-screen frame fixing assembly, 6-printing assembly, 7-first conveyor belt, 8-sensor, 9-first cylinder seat, 10-first cylinder, 11-connecting plate, 12-gear lever, 13-first connecting plate, 14-second connecting plate, 15-third connecting plate, 16-first guide rail, 17-centering stop wheel, 18-second conveyor belt, 19-cross bracket, 20-knife support strip, 21-first motor, 22-worm gear reducer, 23-lifting crankshaft, 24-gearbox Connecting rod, 25-lifting pendulum block, 26-lifting pendulum shaft, 27-platform lifting clamp, 28-lifting support block, 29-knife bar beam, 30-magnet, 31-fourth connecting plate, 32-slide plate, 33-second guide rail, 34-nut, 35-screw, 36-second motor, 37-support block, 38-support plate, 39-angle iron plate, 40-second cylinder, 41-front positioning bearing, 42-lifting guide groove, 43-brick bar support frame, 44-brick bar connecting plate, 45-third cylinder, 46-slide seat, 47-rear positioning bearing, 48-third guide rail, 49-first fixing mechanism, 50-second fixing mechanism, 51-front wire mesh frame, 52-wire mesh mounting frame plate, 53-adjusting handle, 54-wire mesh rod, 55-adjusting guide rod, 56-adjusting pressure block, 57-connecting beam, 58-adjusting screw sleeve, 59-machine head slide rail, 60-scraper seat block, 61-fourth cylinder, 62-scraper connecting plate, 63-scraper guide rod, 64-scraper, 65-third conveying assembly, 66-bearing mounting seat, 67-lifting plate, 68-connecting shaft, 69-fifth connecting plate, 70-mounting plate, 71-cylinder head support, 72-fifth cylinder, 73-sealing plate, 74-sixth connecting plate, 75-sixth cylinder, 76-spherical bearing, 77-brick retaining bar. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0039] like Figures 1 to 18As shown, a screen printing machine is mainly used for printing substrates with a certain thickness, such as metal plates, plastic plates or ceramic plates, and includes a machine platform 1. A feeding mechanism 2, a screen printing mechanism 3 and a discharging mechanism 4 are sequentially arranged on the machine platform 1 according to the process steps. After the substrate enters from the feeding mechanism 2, it is printed in the screen printing mechanism 3 and then output in the discharging mechanism 4. The feeding mechanism 2 includes a first conveying assembly, which is provided with a positioning assembly and a first clamping assembly. The positioning assembly and the first clamping assembly are used to adjust the position of the substrate before entering the printing and then input it for printing. The screen printing mechanism 3 includes a second conveying assembly, which is provided with a lifting support assembly and a second clamping assembly. The lifting support assembly is used to support the substrate and separate it from the conveying of the second conveying assembly, while the second clamping assembly is used to clamp the substrate and then supply it to the printing assembly 6 for printing. A screen frame fixing assembly 5 is provided above the lifting support assembly. The screen frame fixing assembly 5 is used to fix the screen frame. A printing assembly 6 is provided above the screen frame fixing assembly 5. The printing assembly 6 The screen frame in the screen frame fixing assembly 5 is scraped to remove ink, and the ink is printed onto the substrate through the screen frame.

[0040] In this embodiment, the first conveying assembly, the second conveying assembly and the subsequent third conveying assembly all use belt drive for conveying, that is, an active roller, an active wheel, a driven wheel and a conveyor belt are provided, the active roller is connected to the driving motor, the active wheel is connected to the active roller, the active wheel and the driven wheel are connected through the conveyor belt, so that the driving motor is started and finally drives the conveyor belt to move, thereby conveying the printed material; this belt drive structure is existing technology and will not be described in detail here.

[0041] The first conveying assembly includes a plurality of first conveyor belts 7, between which sensors 8 and first cylinder seats 9 are arranged. The sensors 9 and the first cylinder seats 9 are staggered with the first conveyor belts 7 so as not to affect the movement of the first conveyor belts 7. A first cylinder 10 is arranged on the first cylinder seat 9. The first cylinder 10 is hinged to one end of a connecting plate 11, and the other end of the connecting plate 11 is hinged to the middle of a blocking rod 12. The lower end of the blocking rod 12 is hinged to the piston rod of the first cylinder 11; Figure 2 It can be seen that the first cylinder seat 9, the first cylinder 10 and the accessories connected thereto are two in number. When the blocking rod 12 is rotated, it is used to block the advance of the printing substrate and make the front end of the printing substrate level. Moreover, when the blocking rod 12 is in the blocking state, the upper end of the blocking rod 12 is higher than the horizontal plane of the first conveyor belt 7, thereby blocking the printing substrate transported on the first conveyor belt 7. Figure 5It can be seen from the structure that when the piston rod of the first cylinder 10 is retracted, the gear lever 12 is pulled to rotate in the clockwise direction. At this time, the upper end of the gear lever 12 is lower than the first conveyor belt 7, which does not affect the forward conveyance of the substrate. When the substrate needs to be blocked and positioned, the piston rod of the first cylinder 10 is extended, pushing the gear lever 12 to rotate in the counterclockwise direction to the position as shown in FIG. Figure 5 In this state, the upper end of the stop bar 12 is higher than the first conveyor belt 7, which will block the printing material.

[0042] The first clamping assembly is located on the left and right sides of the first conveyor belt 7. The first clamping assembly includes a first connecting plate, a second connecting plate, a third connecting plate and a first guide rail. The upper end of the second connecting plate is connected to the first connecting plate, and the lower end is connected to the third connecting plate. The first connecting plate and the third connecting plate are both arranged vertically with the second connecting plate. A plurality of centering stop wheels are rotatably arranged on the first connecting plate. The centering stop wheels are higher than the surface of the first conveyor belt. The third connecting plate is slidably connected to the first guide rail. The machine is reserved with a slot for the movement of the second connecting plate, including a sixth connecting plate. The sixth connecting plate is provided with a sixth cylinder. The piston rod of the sixth cylinder is connected to the joint bearing, and the joint bearing is connected to the sixth connecting plate. The sixth cylinder is electrically connected to the sensor.

[0043] The first connecting plate 13, the second connecting plate 14, the third connecting plate 15 and the first guide rail 16, the first guide rail 16 is fixedly installed inside the machine 1, the upper end of the second connecting plate 14 is connected and fixed to the first connecting plate 13, and the lower end is connected and fixed to the third connecting plate 15, and the first connecting plate 13 and the third connecting plate 15 are both arranged perpendicular to the second connecting plate 14, and a plurality of centering stop wheels 17 are rotatably provided on the first connecting plate 13, and the centering stop wheels 17 are higher than the surface of the first conveyor belt 7. Therefore, when the first connecting plates 13 on the left and right sides of the first conveyor belt 7 move toward each other, the printing material will be clamped by the centering stop wheels 17 to adjust the printing material. The third connecting plate 15 is slidably connected to the first guide rail 16, and the machine 1 is provided with a slot 101 for the movement of the second connecting plate 14, including a sixth connecting plate 74. The sixth connecting plate 74 is provided with a sixth cylinder 75. The piston rod of the sixth cylinder 75 is connected to the joint bearing 76, and the joint bearing 76 is connected to the third connecting plate 15. Thus, the third connecting plate 15 is pushed and pulled by the sixth cylinder 75, thereby clamping and loosening the substrate. The sixth cylinder 75 and the first cylinder 10 are both electrically connected to the sensor 8 to receive the signal transmitted by the sensor 8. Then it will work once, the first cylinder 10 will drive the gear lever 12 to rotate to block the printing substrate, and the sixth cylinder 75 on both sides will drive the corresponding centering stop wheel 17 to clamp the printing substrate, so that the printing substrate can enter the subsequent process after being straightened, which is beneficial to improve printing accuracy; the joint bearing 76 is a prior art, and the joint bearing 76 can withstand a large load. Since the sliding surface is spherical, it can also make the tilting movement (i.e. centering movement) within a certain viewpoint range. When the bearing shaft and the shaft housing hole are not concentric, it can still work normally, so the above structure can be used for smooth movement.

[0044] The sensor 8 is a light sensor, also commonly known as a photo eye. The light sensor can sensitively sense light energy from ultraviolet light to infrared light and convert the light energy into an electrical signal. It is a prior art and will not be described in detail here. The sensor 8 is below the surface of the first conveyor belt 7 and does not affect the transportation of the substrate.

[0045] The second conveying assembly includes a plurality of second conveyor belts 18, which are connected to the first conveyor belt 7 and are used to receive the straightened printing substrates transported from the first conveyor belt 7. The lifting support assembly includes a cross bracket 19, which is connected to the lifting component. The cross bracket 19 is provided with a plurality of knife strips 20, which are used to support the printing substrates. Space is reserved between the knife strips 20 for placing the second conveying assembly. The lifting component includes a first motor and a worm gear reducer, a first motor 21 and a worm gear reducer 22. The first motor 21 is connected to the worm gear reducer 22. The worm gear reducer 22 is provided with a lifting crankshaft 23. The lifting crankshaft 23 is connected to one end of the gearbox connecting rod 24. The gearbox connecting rod 2 4 is hinged to one end of the lifting pendulum block 25, and the other end of the lifting pendulum block 25 is fixedly connected to the lifting pendulum shaft 26. The two ends of the lifting pendulum shaft 26 are rotatably connected to the machine platform 1 through bearing seats, including a platform lifting clamp 27 and a lifting support block 28. One end of the platform lifting clamp 27 is connected and fixed to the lifting pendulum shaft 26, and the other end is hinged to the lower end of the lifting support block 28. The upper end of the lifting support block 28 is connected to the cross bracket 19; It can be seen from the above structure that the first motor 21 is started, and the lifting crankshaft 23 is driven to rotate by the worm gear reducer 22. The rotation of the lifting crankshaft 23 will drive the gearbox connecting rod 24 to move, and the movement of the gearbox connecting rod 24 will drive the lifting pendulum block 25 to rotate. The lifting crankshaft 23 belongs to the existing technology. Figure 13 It can be seen that since the connecting hole between the lifting crankshaft 23 and the gearbox connecting rod 24 is eccentric, there is room for movement when the gearbox connecting rod 24 and the lifting pendulum block 25 rotate. The other end of the lifting pendulum block 25 is clamped and fixed on the lifting pendulum shaft 26. Therefore, the rotation of the lifting pendulum block 25 drives the lifting pendulum shaft 26 to rotate. One end of the platform lifting clamp 27 is clamped and fixed on the lifting pendulum shaft 26, thus driving the platform lifting clamp 27 to rotate, thereby driving the lifting support block 28 to push the cross bracket 19 to perform lifting movement. Through the forward or reverse rotation of the first motor 21, it can ultimately drive the lifting and lowering of the cross bracket 19. Figure 11 It can be seen that lifting pendulum blocks 25, lifting pendulum shafts 26, platform lifting clamps 27 and lifting support blocks 28 are provided on both sides of the cross bracket 19, and a lifting connecting rod (not pointed out) is also provided. Both ends of the lifting connecting rod are hinged to the lifting pendulum blocks 25 on both sides of the cross bracket 19. Therefore, only one first motor 21 is needed to drive the components on both sides to lift and lower the cross bracket 19. The structure is ingenious.

[0046] A knife support bar crossbeam 29 is provided on the cross bracket 19, and a magnet 30 is embedded in the knife support bar crossbeam 29. A fourth connecting plate 31 made of magnetic material is connected to the bottom of the knife support bar 20, for example, the fourth connecting plate 31 is made of aluminum alloy. The fourth connecting plate 31 is adsorbed and fixed on the magnet 30, so that the knife support bar 20 can be detachably installed and fixed on the knife support bar crossbeam 29 in an adsorption manner, which is helpful for the replacement and maintenance of the knife support bar 20, and the number of the knife support bars 20 can be increased or decreased according to actual production needs, and has good adaptability.

[0047] Thus, the lifting and lowering of the knife support bar 20 can be controlled by the lifting component. When the knife support bar 20 is higher than the surface of the second conveyor belt 18, the printing substrate is lifted. When it is lower than the surface of the second conveyor belt 18, it does not affect the transportation of the printing substrate.

[0048] The second clamping assembly includes a left clamping part and a right clamping part. The left clamping part and the right clamping part have the same structure and are symmetrically located on both sides of the second conveyor belt 18. They are mainly used to clamp the substrate for printing by the printing assembly 6. The left clamping part and the right clamping part include a slide 32. The slide 32 is slidably connected to the second guide rail 33. A nut 34 is provided on the slide 32. The nut 34 is threadedly connected to the screw 35. The end of the screw 35 is connected to the second motor 36. A support block 37 is connected to the slide 32. A support plate 38 is provided on the side of the support block 37 close to the knife bar 20. As can be seen from the working mode of the nut 34 and the screw 35, the second motor 36 drives the screw 35 to rotate, which will drive the slide 32 to slide on the guide rail, so that the support plate 38 clamps the printing substrate. During the design, the screw 35 can be designed so that the texture of the left and right sections are opposite, so that when the screw 35 rotates in one direction, the left clamping assembly and the right clamping assembly can be synchronously controlled to move towards or away from each other, thereby clamping or releasing the printing substrate; the support block 37 is connected to the angle iron plate 39, and the angle iron plate 39 is provided with a second cylinder 40, and the piston rod of the second cylinder 40 is connected to the support plate 37.

[0049] The height of the support plate 38 can be controlled by extending and retracting the piston rod of the second cylinder 40, so that it can adapt to the use of printing materials of different thicknesses or heights. The support block 37 and the support plate 38 are not fixed to each other, but the gap between the two is relatively small. When the support plate 38 clamps the printing material, the support block 38 provides a backing force for the support plate 38, thereby enhancing the clamping effect.

[0050] It includes a front positioning bearing 41 and a lifting guide groove 42. The front positioning bearing 41 is rotatably connected to the brick blocking bar 77. The brick blocking bar 77 is located next to the second conveyor belt 18. One end of the brick blocking bar 77 is hinged to the brick blocking bar support frame 43, and the other end is connected to the brick blocking bar connecting plate 44. The lower end of the brick blocking bar connecting plate 44 is connected to the second cylinder seat (not specified). The second cylinder seat is hinged to the piston rod of the third cylinder 45. In conventional transportation, the front positioning bearing 41 is lower than the second conveyor belt 18. When it is necessary to block the printing substrate, the piston rod of the third cylinder 45 rises, driving the brick blocking bar connecting plate 44 to rise, thereby raising the brick blocking bar 77 and the front positioning bearing 41. The front positioning bearing 41 is higher than the surface of the second conveyor belt 18, which can block the advancing printing substrate.

[0051] The lifting guide groove 42 is connected to the cross bracket 19. As the cross bracket 19 rises, the lifting guide groove 42 is located next to the second conveyor belt 18 and is set in the same direction as the transmission direction of the second conveyor belt 18. A slide 46 is slidingly set on the lifting guide groove 42, and a rear positioning bearing 47 is rotatably set on the slide 46. The slide 46 can be driven by a cylinder or a screw structure to slide in the lifting guide groove 42, which is not limited here, thereby driving the rear positioning bearing 47 to move forward and cooperate with the front positioning bearing 41 to clamp the front and rear sides of the substrate. The brick retaining bar 77 and the lifting guide groove 42 are staggered because they do not interfere with each other.

[0052] The working principle of the above structure is that when the printing material enters the printing position through the second conveyor belt 18, the piston rod of the third cylinder 45 extends, driving the front positioning bearing 41 to rise, thereby blocking the advancement of the printing material; at the same time, the first motor 21 of the lifting assembly rotates, driving the cross bracket 19 to rise, causing the knife bar 20 to rise, higher than the surface of the second conveyor belt 18, and supporting the printing material. It is assumed that the printing material is not completely higher than the front positioning bearing 41 after being supported, that is, the front positioning bearing 41 still blocks the front end of the printing material, and the rise of the cross bracket 19 also drives the rise of the lifting guide groove 42 (the rear positioning bearing 41 is not raised when the cross bracket 19 is not raised). The bearing 47 is lower than the second conveyor belt 18 and does not affect the input of the printing material). At this time, the slide 46 drives the rear positioning bearing 47 to move forward in the lifting guide groove 42, and cooperates with the front positioning bearing 41 to clamp the front and rear sides of the printing material; in addition, the left clamping component and the right clamping component also work synchronously. When the second motor 36 is started, it will drive the left clamping component and the right clamping component to move toward each other, so that the support blocks 37 and the support plates 38 on both sides can clamp the left and right sides of the printing material together, and finally clamp the four directions of the printing material for the silk screen printing component to print, which is beneficial to improve the printing quality.

[0053] The screen frame fixing assembly 5 includes a third guide rail 48, on which a first fixing mechanism 49 and a second fixing mechanism 50 are slidably arranged. The first fixing mechanism 49 and the second fixing mechanism 50 have the same structure and are symmetrically arranged. The second fixing mechanism 50 includes a front screen frame 51, a screen installation frame plate 52 is connected to the top of the front screen frame 51, and the screen installation frame plate 52 is slidably connected to the third guide rail 48; the first fixing mechanism 49 and / or the second fixing mechanism 50 are connected to a screw adjustment assembly; the screw adjustment assembly includes an adjustment handle 53, a screen rod 54 and an adjustment guide rod 55, the adjustment handle 53 is connected to the screen rod 54, the screen rod 54 is rotatably connected to the adjustment guide rod 55, the adjustment guide rod 55 is connected and fixed to the adjustment pressure block 56, and a connecting beam 57 is connected to the third guide rail 48, and the screen rod 54 is threadedly connected to the connecting beam 57. The screen frame is fixed between the front screen frame 51 corresponding to the first fixing mechanism 49 and the second fixing mechanism 50. Because the adjustment handle 53 drives the screen rod 54 to rotate, it eventually pulls the first fixing mechanism 49 to slide on the third guide rail 48, thereby adjusting the distance between the first fixing mechanism 49 and the second fixing mechanism 50 to adapt to the clamping and fixing of screen frames of different widths. Figure 14 54 , thereby making the first fixing mechanism 49 move in a fine-tuning manner.

[0054] like Figure 15As shown, the printing component 6 includes a head slide 59, which is fixed on the machine table 1. A scraper seat block 60 is slidably provided on the head slide 59, and a fourth cylinder 61 is provided on the scraper seat block 60. The piston rod of the fourth cylinder 61 is connected to the scraper connecting plate 62, and a scraper guide rod 63 is slidably provided on the scraper connecting plate 62. The upper end of the scraper guide rod 63 is connected to the scraper connecting plate 62, and the lower end is connected to the scraper 65. From the above structure, it can be seen that the scraper seat block 60 moves back and forth laterally on the head slide 59, which will drive the scraper 65 to move back and forth to perform ink scraping and printing. In addition, through the extension and retraction of the piston rod of the fourth cylinder 61, the scraper connecting plate 62 can be driven to rise and fall, thereby driving the scraper 65 to be raised and lowered through the scraper guide rod 63 to be suitable for printing on substrates of different thicknesses.

[0055] The discharging mechanism 4 includes a third conveying assembly 65, which is connected to the second conveying assembly. The machine 1 is provided with a channel 102. The third conveying assembly is located above the channel 102. In this design, the third conveying assembly 65 is rotatably arranged on the machine 1. The third conveying assembly 65 includes a bearing mounting seat 66 and a lifting plate 67. The bearing mounting seat 66 is connected to the machine 1. The bearing mounting seat 66 is connected to a coupling shaft 68. The lifting plate 67 is connected to a fifth connecting plate 69. The fifth connecting plate 69 is connected to one end of the mounting plate 70. The other end of the mounting plate 70 is provided with a bearing (not shown). The mounting plate 70 is connected to the coupling shaft 68 through the bearing. In this design, Figure 17 as well as Figure 18 It can be seen that the driving wheel in the third conveying assembly 65 is fixedly connected to the connecting shaft 68, the fifth connecting plate 69 is connected to the support frame, and the driven wheel is rotatably connected to the support frame. The rotation of the connecting shaft 68 will drive the driving wheel to rotate, thereby causing the conveyor belt in the third conveying assembly 65 to move for transportation. Since the mounting plate 70 is connected to the connecting shaft 68 through a bearing, the rotation of the connecting shaft 68 does not affect the mounting plate 70; the lower surface of the lifting plate 67 is connected to the cylinder head support 71, and the cylinder head support 71 is connected to the fifth cylinder head support 71. The cylinder head of cylinder 72 is connected. When the piston rod in the fifth cylinder 72 is extended, it will drive the lifting plate 67 to rotate with the connecting shaft 68 as the center; sealing plates 73 are provided on both sides of the channel 102. The sealing plates 73 are detachably connected to the machine 1. The sealing plates 73 can be connected to the machine 1 by a snap-on or hanging type, which is not limited at this time. The purpose of the above structure is that when the operator needs to go from one side of the machine 1 to the other side, the sealing plate 73 on one side is removed, and then the piston rod in the fifth cylinder 72 is extended, thereby driving the lifting plate 67 together with the third conveying assembly to rotate upward, so that the operator can go to the other side of the machine 1 through the channel 102 without having to detour to the head end or tail end of the machine 1 to go to the other side, saving time and improving work efficiency.

[0056] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. However, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A screen printing machine, characterized in that: The invention comprises a machine platform, on which a feeding mechanism, a screen printing mechanism, and a discharging mechanism are sequentially arranged according to the process steps; the feeding mechanism comprises a first conveying assembly, which is provided with a positioning assembly and a first clamping assembly; the screen printing mechanism comprises a second conveying assembly, which is provided with a lifting support assembly and a second clamping assembly; a screen frame fixing assembly is provided above the lifting support assembly; and a printing assembly is provided above the screen frame fixing assembly; The first conveying assembly includes a plurality of first conveyor belts, wherein sensors and first cylinder seats are arranged between the first conveyor belts, and the sensors and first cylinder seats are staggered with the first conveyor belts. A first cylinder is arranged on the first cylinder seat, and the first cylinder is hinged to one end of a connecting plate, the other end of the connecting plate is hinged to the middle of a blocking rod, and the lower end of the blocking rod is hinged to the piston rod of the first cylinder; The second conveying assembly includes a plurality of second conveyor belts, the second conveyor belts are connected to the first conveyor belt, the lifting support assembly includes a cross bracket, the cross bracket is connected to the lifting component, and a plurality of knife support strips are provided on the cross bracket. The lifting component includes a first motor and a worm gear reducer, the first motor is connected to the worm gear reducer, the worm gear reducer is provided with a lifting crankshaft, the lifting crankshaft is connected to one end of the gear box connecting rod, the other end of the gear box connecting rod is connected to one end of the lifting pendulum block, the other end of the lifting pendulum block is connected to the lifting pendulum shaft, and both ends of the lifting pendulum shaft are rotatably connected to the machine platform, including a platform lifting clamp and a lifting support block, one end of the platform lifting clamp is connected and fixed to the lifting pendulum shaft, and the other end is hinged to the lower end of the lifting support block, and the upper end of the lifting support block is connected to the cross bracket; a knife support strip cross beam is provided on the cross bracket, a magnet is embedded in the knife support strip cross beam, and a fourth connecting plate made of magnetic material is connected below the knife support strip, and the fourth connecting plate is adsorbed and fixed on the magnet; The second clamping assembly includes a left clamping part and a right clamping part, the left clamping part and the right clamping part have the same structure and are symmetrically located on both sides of the second conveyor belt, the left clamping part and the right clamping part include a slide, the slide is slidably connected to the second guide rail, a nut is provided on the slide, the nut is threadedly connected to the screw, the end of the screw is connected to the second motor, the slide is connected to a supporting block, and a supporting plate is provided on the side of the supporting block close to the blade strip; the supporting block is connected to an angle iron plate, a second cylinder is provided on the angle iron plate, and the piston rod of the second cylinder is connected to the supporting plate; It includes a front positioning bearing and a lifting guide groove, the front positioning bearing is rotatably connected to the brick blocking bar, the brick blocking bar is located next to the second conveyor belt, one end of the brick blocking bar is hinged to the brick blocking bar support frame, and the other end is connected to the brick blocking bar connecting plate, the lower end of the brick blocking bar connecting plate is connected to the second cylinder seat, and the second cylinder seat is hinged to the piston rod of the third cylinder; the lifting guide groove is connected to the cross bracket, the lifting guide groove is located next to the second conveyor belt, and the setting direction is the same as the transmission direction of the second conveyor belt, a slide is slidably provided on the lifting guide groove, and a rear positioning bearing is rotatably provided on the slide.

2. A screen printing machine according to claim 1, characterized in that, The first clamping assembly is located on the left and right sides of the first conveyor belt, and the first clamping assembly includes a first connecting plate, a second connecting plate, a third connecting plate and a first guide rail. The upper end of the second connecting plate is connected to the first connecting plate, and the lower end is connected to the third connecting plate. The first connecting plate and the third connecting plate are both arranged perpendicular to the second connecting plate. A plurality of centering stop wheels are rotatably arranged on the first connecting plate, and the centering stop wheels are higher than the surface of the first conveyor belt. The third connecting plate is slidably connected to the first guide rail, and the machine is reserved with a slot for moving the second connecting plate; it includes a sixth connecting plate, and a sixth cylinder is provided on the sixth connecting plate. The piston rod of the sixth cylinder is connected to the joint bearing, and the joint bearing is connected to the sixth connecting plate. The sixth cylinder is electrically connected to the sensor.

3. A screen printing machine according to claim 1, characterized in that, The mesh frame fixing assembly includes a third guide rail, and a first fixing mechanism and a second fixing mechanism are slidably arranged on the third guide rail. The first fixing mechanism and the second fixing mechanism have the same structure and are symmetrically arranged. The first fixing mechanism and the second fixing mechanism include a front wire mesh frame, and a wire mesh mounting frame plate is connected above the front wire mesh frame, and the wire mesh mounting frame plate is slidably connected to the third guide rail; the first fixing mechanism and / or the second fixing mechanism are connected to a screw adjustment assembly; the screw adjustment assembly includes an adjustment handle, a wire mesh rod and an adjustment guide rod, the adjustment handle is connected to the wire mesh rod, the wire mesh rod is rotatably connected to the adjustment guide rod, the adjustment guide rod is connected and fixed to the adjustment pressure block, a connecting beam is connected to the third guide rail, and the wire mesh rod is threadedly connected to the connecting beam; it includes an adjusting screw sleeve, one end of the adjusting screw sleeve is rotatably connected to the adjustment guide rod, and the other end is threadedly connected to the wire mesh rod.

4. A screen printing machine according to any one of claims 1 to 3, characterized in that: The printing assembly includes a machine head slide rail, a scraper seat block is slidably provided on the machine head slide rail, a fourth cylinder is provided on the scraper seat block, the piston rod of the fourth cylinder is connected to the scraper connecting plate, a scraper guide rod is slidably provided on the scraper connecting plate, the upper end of the scraper guide rod is connected to the scraper connecting plate, and the lower end is connected to the scraper.

5. The screen printing machine according to claim 1, characterized in that: The discharging mechanism includes a third conveying assembly, which is connected to the second conveying assembly. The machine is provided with a channel, and the third conveying assembly is located above the channel. The third conveying assembly includes a bearing mounting seat and a lifting plate. The bearing mounting seat is connected to the machine, and a connecting shaft is connected to the bearing mounting seat. A fifth connecting plate is connected to the lifting plate, and the fifth connecting plate is connected to one end of the mounting plate. A bearing is provided at the other end of the mounting plate, and the bearing is connected to the connecting shaft. The lower surface of the lifting plate is connected to a cylinder head support, and the cylinder head support is connected to the cylinder head of the fifth cylinder.

6. A screen printing machine according to claim 5, characterized in that: Sealing plates are provided on both sides of the channel, and the sealing plates are detachably connected to the machine platform.

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