Full-automatic drum-type screen printing machine

Abstract

The invention relates to the technical field of printing equipment, and provides a full-automatic drum-type screen printing machine which comprises a fixed rack, a printing rack, a conveying assembly, a position adjusting assembly, a printing drum, a first motor, an ink scraping assembly, a sliding frame, a mounting frame and a printing assembly, the printing rack is fixedly mounted on the upper portion of the fixed rack, and the conveying assembly is mounted on the printing rack; the position adjusting assembly is mounted on the printing rack, the printing cylinder is fixedly mounted in the printing rack, the first motor is fixedly mounted on the printing rack, the output end of the first motor is fixedly connected with the printing cylinder, the ink scraping assembly is mounted on the position adjusting assembly, the sliding frame is slidably mounted on the printing rack, and the mounting frame is rotatably mounted on the sliding frame. According to the technical scheme, the problem that in the prior art, due to the fact that problems occur when the position of a doctor blade is adjusted, the doctor blade jumps easily in the working process, and the printing quality is affected is solved.

Description

Technical Field

[0001] The invention relates to the technical field of printing equipment, and in particular to a full-automatic roller-type screen printing machine. Background Art

[0002] Screen printer, also known as silk screen printer, is a machine that uses silk screen printing technology for printing. Silk screen printing is a non-contact printing method that can print exquisite patterns and texts on the surface of various materials (such as textiles, metal plates, plastics, leather, wood boards, glass and ceramics). Screen printers are widely used in packaging, electronic products, ceramic printing and other industries, especially those materials that do not allow direct printing.

[0003] The screen printing machine is mainly composed of a printing device, an ink supply mechanism and a traction device. The printing device is mainly composed of rollers, pressure wheels, drive motors, air supply pipes, air suction pipes, etc. When printing, the roller drives the screen to roll on the printed material, and at the same time, the pressure wheel applies pressure to make the screen and the printed material in close contact, thereby completing the printing. The ink supply mechanism includes an ink reservoir, an ink regulating valve, an oil pump, an ink delivery pipeline, etc. The ink reservoir is used to store ink, the ink regulating valve is responsible for adjusting the flow and viscosity of the ink, the oil pump is responsible for conveying ink, the ink delivery pipeline is responsible for guiding the ink to flow to the printing area, and the traction device plays a transmission role.

[0004] During the printing process of the printing machine, the position of the squeegee may deviate when being adjusted, resulting in uneven contact between the squeegee and the screen, which may cause squeegee jumping, thereby affecting the printing quality. In the prior art, a pressure-maintaining device is generally installed to reduce the occurrence of squeegee jumping. However, the current pressure-maintaining device generally uses a cylinder to maintain pressure. During the working process, due to the continuous printing, the air path may leak, causing the cylinder to be unstable, affecting the printing quality. Summary of the invention

[0005] The present invention provides a fully automatic drum screen printing machine, which solves the problem in the related art that the squeegee is prone to blade jumping during operation due to problems in adjusting the position of the squeegee, thereby affecting the printing quality.

[0006] The technical solution of the present invention is as follows: A fully automatic drum screen printing machine, comprising: Fixed rack; A printing frame, the printing frame is fixedly mounted on the upper part of the fixed frame; A conveying assembly, which is installed on the printing machine frame and is used to convey printing articles; A positioning component, the positioning component is installed on the printing machine frame; A printing cylinder, wherein the printing cylinder is fixedly mounted inside the printing frame; A first motor, wherein the first motor is fixedly mounted on the printing machine frame, and an output end of the first motor is fixedly connected to the printing cylinder; An ink scraping assembly, the ink scraping assembly is mounted on the position adjusting assembly, the ink scraping assembly is located on the upper part of the printing cylinder and is used for printing, wherein the position adjusting assembly is used to adjust the position of the ink scraping assembly; A sliding frame, wherein the sliding frame is slidably mounted on the printing machine frame; A mounting frame, the mounting frame being rotatably mounted on the sliding frame; A printing assembly is installed on the sliding frame, and the printing assembly is located between the printing roller and the ink scraping assembly for printing.

[0007] On the basis of the above scheme, the conveying assembly comprises: A first conveyor, the first conveyor being fixedly mounted at the feed of the printing frame; A second conveyor, the second conveyor is fixedly mounted on the printing machine frame, the second conveyor is arranged obliquely, and the second conveyor is located between the first conveyor and the printing cylinder; A third conveyor, the third conveyor is fixedly installed at the discharge of the printing frame; A correction unit is installed on the printing machine frame and is located between the second conveyor and the printing cylinder.

[0008] On the basis of the above scheme, the correction unit includes: A correction frame, the correction frame is fixedly mounted on the printing machine frame, and the correction frame is located between the second conveyor and the printing cylinder; Correction plates, two of which are symmetrically and rotatably mounted on the correction frame; A first spring is fixedly installed between the two correction plates and the correction frame.

[0009] On the basis of the above scheme, the positioning component includes: Support frames, two of which are symmetrically and fixedly mounted on the printing machine frame; A movable frame is slidably mounted between the two support frames; A transmission screw rod, on which the two support frames are rotatably mounted; A second motor, the second motor is fixedly mounted on the two support frames, and the output end of the second motor is fixedly connected to the transmission screw; A transmission nut is threadedly sleeved on the two transmission screw rods, and the two transmission nuts are respectively fixedly connected to the two ends of the moving frame.

[0010] On the basis of the above scheme, the ink scraping assembly comprises: A load-bearing frame, the load-bearing frame is fixedly mounted on the mobile frame; Partition plates, two of which are symmetrically and fixedly installed inside the supporting frame; The tool holder is provided with two tool holders symmetrically and slidably mounted inside the movable frame; An ink scraper, wherein the ink scraper is detachably mounted on one of the blade holders; An ink return knife, the ink return knife being detachably mounted on the other knife holder; A driving part, which is mounted on the carrying frame and is used to drive the two tool holders to move; A locking portion, which is mounted on the supporting frame and is used to lock the position of the tool holder.

[0011] On the basis of the above scheme, the driving part includes: A docking frame, the upper parts of the two tool holders are symmetrically and fixedly mounted with the docking frame; A connecting shaft, the connecting shaft being rotatably mounted between the two partitions; A connecting frame, two connecting frames are symmetrically and fixedly installed on both sides of the connecting shaft, and the connecting frame is slidably connected to the docking frame; A push plate, the push plate is fixedly mounted on the upper part of the connecting shaft; Electric cylinders: a plurality of electric cylinders are fixedly mounted at equal distances on both sides of the supporting frame, and the output ends of the electric cylinders are in contact with the pushing plate.

[0012] On the basis of the above solution, the locking part comprises: An arc-shaped groove, wherein the arc-shaped groove is provided on each of the two partitions, and the center position of the arc-shaped groove coincides with the center position of the connecting shaft; A slider, wherein the two arc-shaped grooves are both slidably mounted with the slider, and the slider is rotatably connected with the push plate; A telescopic rod, on which the two sliding blocks are fixedly mounted; Supports, the other ends of the two telescopic rods are rotatably mounted with the supports respectively, and the supports are fixedly connected to the carrying frame; A second spring is fixedly installed between the two supports and the sliding block, and the telescopic rod is located inside the second spring.

[0013] Based on the above scheme, the printing assembly includes: A driving frame, wherein the driving frames are fixedly mounted on both sides of the sliding frame, the two driving frames are symmetrically arranged, and the driving frames are located inside the printing machine frame; A third motor, the third motor is fixedly mounted on one of the driving frames; A transmission shaft, the transmission shaft being rotatably mounted between the two drive frames; a first helical gear, wherein the first helical gear is fixedly mounted at an output end of the third motor; a second helical gear, the second helical gear being fixedly mounted on the transmission shaft and meshing with the first helical gear; A driving gear, wherein the driving gear is fixedly mounted on both ends of the transmission shaft; Racks, two of which are symmetrically and fixedly installed inside the printing frame, and mesh with the driving gear; A printing plate, wherein the printing plate is arranged on the sliding frame; The mounting part is mounted on the mounting frame and is used to fix the position of the printing plate.

[0014] On the basis of the above solution, the installation part includes: Connecting bolts, the mounting frame is provided with the connecting bolts, and the connecting bolts are adapted to the sliding frame; A fixing frame, wherein the fixing frames are fixedly installed at the four corners of the installation frame; A positioning frame, on which the four fixing frames are all slidably mounted; A pressure head is fixedly mounted on the bottom of the four positioning frames.

[0015] In addition to the above solutions, it also includes: A knob, on each of the four fixing frames the knob is rotatably mounted; A driving gear, wherein the driving gear is fixedly installed inside each of the four knobs; An adjusting nut, on each of the four positioning frames, the adjusting nut is fixedly mounted; An adjusting screw rod, wherein the adjusting screw rod is rotatably mounted on each of the four fixing frames, and the adjusting screw rod is threadably matched with the adjusting nut; A driven gear is fixedly mounted on each of the four adjusting screws, and the driven gear is meshed with the driving gear.

[0016] The working principle and beneficial effects of the present invention are: 1. In the present invention, the electric cylinder at the corresponding position is started, and the output end of the electric cylinder is against the push plate, thereby driving the connecting shaft to swing at a certain angle through the push plate. When the connecting shaft swings, the connecting frame is driven to swing, so that through the cooperation of the connecting frame and the docking frame, the tool holder at the corresponding position is driven to move downward, and the tool holder on the other side moves upward. At this time, relative sliding occurs between the docking frame and the connecting frame. When the tool holder moves to the extreme position, the tool just contacts the printing plate. At this time, the ink return knife and the scraper knife act synchronously, which improves the efficiency and stability when switching the tools.

[0017] 2. In the present invention, when adjusting the positions of the ink return knife and the ink scraper, the push plate swings, and the push plate drives the slider to slide on the arc groove. At this time, the telescopic rod may be extended or retracted. When the ink return knife or the ink scraper moves to the set position, the slider is at the extreme position on the arc groove. At this time, under the action of the second spring, the slider and the support can cooperate to achieve a positioning effect, thereby improving the stability during printing. Even if the electric cylinder is frustrated, it will not affect the working state of the ink return knife and the ink scraper.

[0018] 3. In the present invention, the knob drives the active gear to rotate, the active gear drives the driven gear to rotate, the driven gear drives the adjusting screw to rotate, thereby driving the adjusting nut to move, thereby driving the positioning frame to move on the fixing frame through the adjusting nut, thereby driving the pressure head to move through the positioning frame until the pressure head contacts the frame of the printing plate, so that the position of the printing plate can be fixed, and the knob can be adjusted separately to fine-tune the position of the printing plate, so that the contact between the ink return knife and the scraper and the printing plate is smoother, reducing the occurrence of unclear areas of the printed pattern, and improving the printing quality.

[0019] 4. In the present invention, by setting the ink scraper assembly, the position of the ink scraper can be fixed more stably during the printing process, thereby reducing the possibility of the ink scraper jumping phenomenon and improving the printing quality. At the same time, by setting the printing assembly, the position of the printing plate can be conveniently and stably adjusted to make the printing plate fully contact with the ink scraper and the ink return knife, thereby improving the printing quality and reducing the occurrence of unclear areas of the printed pattern. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of a three-dimensional structure in cross section in the present invention; Figure 3 It is a structural schematic diagram of the conveying component in the present invention; Figure 4 It is a cross-sectional structural schematic diagram of the position adjustment component in the present invention; Figure 5 It is a schematic diagram of the structure of the ink scraping assembly in the present invention; Figure 6 It is a schematic cross-sectional structure diagram of the locking part in the present invention; Figure 7 It is a schematic cross-sectional view of the printing assembly in the present invention; Figure 8 It is a schematic cross-sectional structure diagram of the mounting portion in the present invention; Fig. 9 It is a cross-sectional structural schematic diagram of the cooperation between the printing assembly and the mounting part in the present invention; Fig.10 For the present invention Figure 3 A schematic diagram of the local enlarged structure at point A in the middle; Fig.11 For the present invention Figure 5 A schematic diagram of the local enlarged structure at B in the middle; Fig.12 For the present invention Figure 7 Schematic diagram of the local enlarged structure at point C in the middle.

[0022] The numbers in the figure represent: 1, fixed frame; 2, printing frame; 3, printing roller; 4, first motor; 5, sliding frame; 6, mounting frame; 7, first conveyor; 8, second conveyor; 9, third conveyor; 10, correction frame; 11, correction plate; 12, first spring; 13, support frame; 14, moving frame; 15, transmission screw; 16, second motor; 17, transmission nut; 18, bearing frame; 19, partition; 20, knife frame; 21, scraper; 22, ink return knife; 23, docking frame; 24, connecting shaft ; 25. Connecting frame; 26. Push plate; 27. Electric cylinder; 28. Arc groove; 29. ​​Slider; 30. Telescopic rod; 31. Support; 32. Second spring; 33. Driving frame; 34. Third motor; 35. Transmission shaft; 36. First bevel gear; 37. Second bevel gear; 38. Driving gear; 39. Rack; 40. Printing plate; 41. Connecting bolt; 42. Fixing frame; 43. Positioning frame; 44. Press head; 45. Knob; 46. Driving gear; 47. Adjusting nut; 48. Adjusting screw; 49. Driven gear. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0024] like Figures 1 to 12 As shown, this embodiment proposes a fully automatic drum screen printing machine, including a fixed frame 1, a printing frame 2, a conveying assembly, a positioning assembly, a printing roller 3, a first motor 4, an ink scraping assembly, a sliding frame 5, a mounting frame 6 and a printing assembly. The printing frame 2 is fixedly installed on the upper part of the fixed frame 1, and the conveying assembly is installed on the printing frame 2 for conveying printing materials. The conveying assembly includes a first conveyor 7, a second conveyor 8, a third conveyor 9 and a correction part. The first conveyor 7 is fixedly installed at the feeding place of the printing frame 2, the second conveyor 8 is fixedly installed on the printing frame 2, the second conveyor 8 is inclinedly arranged, the second conveyor 8 is located between the first conveyor 7 and the printing roller 3, the third conveyor 9 is fixedly installed at the discharging place of the printing frame 2, and the correction part is installed on the printing frame 2, and the correction part is located between the second conveyor 8 and the printing roller 3.

[0025] Specifically, when printing on a substrate, first install the printing assembly, then place the substrate to be printed on the first conveyor 7 in sequence through an external loading device, start the first conveyor 7 and the second conveyor 8, and convey the substrate placed on the first conveyor 7 to the position of the correction section through the second conveyor 8. At this time, the edge of the substrate is close to the position of the printing roller 3. At this time, the positioning assembly is started to adjust the position of the ink scraper assembly until the ink scraper assembly moves to the set position, and then printing can be started on the substrate close to the printing roller 3. At this time, the first motor 4 is started, and the first motor 4 drives the printing roller 3 to rotate. At the same time, the printing assembly moves synchronously, and the substrate can be printed through the cooperation of the second conveyor 8 and the ink scraper assembly. The printed substrate will be moved into the third conveyor 9 under the action of the printing roller 3, and then the third conveyor 9 is started to move the printed substrate into the next link.

[0026] The above, such as Fig.10 As shown, the correction part includes a correction frame 10, a correction plate 11 and a first spring 12. The correction frame 10 is fixedly installed on the printing machine frame 2. The correction frame 10 is located between the second conveyor 8 and the printing cylinder 3. Two correction plates 11 are symmetrically and rotatably installed on the correction frame 10. The first spring 12 is fixedly installed between the two correction plates 11 and the correction frame 10.

[0027] Specifically, when the printing material is close to the printing roller 3 under the action of the second conveyor 8, the position of the printing material can be adjusted under the action of the correction plate 11 and the first spring 12 to avoid the printed pattern from being offset during printing.

[0028] like Figure 4As shown, the position adjustment component is installed on the printing frame 2, and the position adjustment component includes a support frame 13, a movable frame 14, a transmission screw 15, a second motor 16 and a transmission nut 17. Two support frames 13 are symmetrically and fixedly installed on the printing frame 2, and the movable frame 14 is slidably installed between the two support frames 13. The transmission screw 15 is rotatably installed on the two support frames 13, and the second motor 16 is fixedly installed on the two support frames 13. The output end of the second motor 16 is fixedly connected to the transmission screw 15, and the two transmission screws 15 are threadedly sleeved with transmission nuts 17. The two transmission nuts 17 are respectively fixedly connected to the two ends of the movable frame 14.

[0029] Specifically, when printing the substrate, the movable frame 14 needs to be moved to the set position. At this time, the second motor 16 is started, and the second motor 16 drives the transmission screw 15 to rotate, and the transmission screw 15 drives the transmission nut 17 to move, thereby driving the movable frame 14 to move through the movement of the transmission nut 17 until the movable frame 14 is moved to the set position, and then the second motor 16 can be turned off and locked to fix the position of the movable frame 14.

[0030] like Figure 5 , Figure 6 As shown, the printing roller 3 is fixedly installed inside the printing frame 2, the first motor 4 is fixedly installed on the printing frame 2, the output end of the first motor 4 is fixedly connected to the printing roller 3, the ink scraping assembly is installed on the positioning assembly, the ink scraping assembly is located on the upper part of the printing roller 3, and is used for printing. The ink scraping assembly includes a supporting frame 18, a partition 19, a tool holder 20, an ink scraping blade 21, an ink return blade 22, a driving part and a locking part. The supporting frame 18 is fixedly installed on the moving frame 14, and two partitions 19 are symmetrically and fixedly installed inside the supporting frame 18, and two tool holders 20 are symmetrically and slidably installed inside the moving frame 14, one of the tool holders 20 is detachably installed with the ink scraping blade 21, and the other tool holder 20 is detachably installed with the ink return blade 22, the driving part is installed on the supporting frame 18, and is used to drive the two tool holders 20 to move, and the locking part is installed on the supporting frame 18, and is used to lock the position of the tool holder 20.

[0031] Specifically, before printing on the substrate, the driving part is started first, and the ink return knife 22 is lowered through the knife holder 20. At this time, the ink return knife 22 just contacts with the printing plate 40. At this time, the sliding frame 5 is moved to move it to the working position. At this time, the ink return knife 22 evenly scrapes the ink on the printing plate 40. At this time, the driving part is started again, and the ink return knife 22 is moved back to its original position through the knife holder 20. At the same time, the ink scraper 21 is moved to the working position. At this time, the ink scraper 21 contacts with the printing plate 40. At this time, the position of the ink scraper 21 can be fixed by setting the locking part, which reduces the possibility of the ink scraper 21 jumping during the printing process and improves the printing quality.

[0032] The above, such as Figure 5 As shown, the driving part includes a docking frame 23, a connecting shaft 24, a connecting frame 25, a pushing plate 26 and an electric cylinder 27. The docking frames 23 are symmetrically and fixedly installed on the upper parts of the two tool holders 20. The connecting shaft 24 is rotatably installed between the two partitions 19. Two connecting frames 25 are symmetrically and fixedly installed on both sides of the connecting shaft 24. The connecting frame 25 is slidably connected to the docking frame 23. A pushing plate 26 is fixedly installed on the upper part of the connecting shaft 24. A plurality of electric cylinders 27 are fixedly installed at equal distances on both sides of the supporting frame 18, and the output end of the electric cylinder 27 abuts against the pushing plate 26.

[0033] Specifically, when it is necessary to evenly apply ink on the printing plate 40, the ink return knife 22 needs to contact with the ink. At this time, the electric cylinder 27 at the corresponding position is started, and the output end of the electric cylinder 27 is against the pushing plate 26, thereby driving the connecting shaft 24 to swing at a certain angle through the pushing plate 26. While the connecting shaft 24 swings, the connecting frame 25 is driven to swing, so that through the cooperation of the connecting frame 25 and the docking frame 23, the knife holder 20 at the corresponding position is driven to move downward, and the knife holder 20 on the other side moves upward. At this time, relative sliding occurs between the docking frame 23 and the connecting frame 25. When the knife holder 20 moves to the extreme position, the ink return knife 22 just contacts with the printing plate 40. At this time, the ink can be scraped on the printing plate 40. When it is necessary to print the substrate, the electric cylinder 27 in the working state is retracted, and the electric cylinder 27 on the other side is started to move. The connecting shaft 24 is swung in the opposite direction through the pushing plate 26 until the ink scraper 21 contacts with the printing plate 40, and printing can start.

[0034] The above, such as Figure 6 As shown, the locking portion includes an arc groove 28, a slider 29, a telescopic rod 30, a support 31 and a second spring 32. The two partitions 19 are each provided with an arc groove 28, and the center position of the arc groove 28 coincides with the center position of the connecting shaft 24. Sliders 29 are slidably installed on the two arc grooves 28, and the slider 29 is rotatably connected to the push plate 26. The telescopic rod 30 is fixedly installed on the two sliders 29, and the other ends of the two telescopic rods 30 are rotatably installed with supports 31, which are fixedly connected to the supporting frame 18. The second spring 32 is fixedly installed between the two supports 31 and the slider 29, and the telescopic rod 30 is located inside the second spring 32.

[0035] Specifically, when adjusting the positions of the ink return knife 22 and the ink scraper 21, the push plate 26 swings, and the push plate 26 drives the slider 29 to slide on the arc groove 28. At this time, the telescopic rod 30 may be extended or retracted. When the ink return knife 22 or the ink scraper 21 moves to the set position, the slider 29 is at the extreme position on the arc groove 28. At this time, under the action of the second spring 32, the slider 29 and the support 31 can cooperate to achieve a positioning effect, thereby improving the stability during printing.

[0036] like Figures 7 to 9 as well as Fig.12 As shown, the sliding frame 5 is slidably installed on the printing frame 2, the mounting frame 6 is rotatably installed on the sliding frame 5, the printing assembly is installed on the sliding frame 5, the printing assembly is located between the printing roller 3 and the ink scraping assembly, and is used for printing. The printing assembly includes a driving frame 33, a third motor 34, a transmission shaft 35, a first bevel gear 36, a second bevel gear 37, a driving gear 38, a rack 39, a printing plate 40 and a mounting portion. The driving frames 33 are fixedly installed on both sides of the sliding frame 5. The two driving frames 33 are symmetrically arranged. The driving frames 33 are located inside the printing frame 2, and the third motor 34 is fixedly installed. It is installed on one of the driving frames 33, and the transmission shaft 35 is rotatably installed between the two driving frames 33. The first bevel gear 36 is fixedly installed on the output end of the third motor 34, and the second bevel gear 37 is fixedly installed on the transmission shaft 35. The second bevel gear 37 is meshed with the first bevel gear 36. Both ends of the transmission shaft 35 are fixedly installed with driving gears 38. Two racks 39 are symmetrically and fixedly installed inside the printing frame 2, and the racks 39 are meshed with the driving gears 38. The printing plate 40 is set on the sliding frame 5, and the mounting portion is mounted on the mounting frame 6 for fixing the position of the printing plate 40.

[0037] Specifically, before printing, the printing plate 40 is placed on the sliding frame 5, and the position of the printing plate 40 is fixed by the mounting portion. After the position of the printing plate 40 is adjusted, printing can be started. When it is necessary to evenly scrape the ink on the printing plate 40, the ink return knife 22 is first moved to the working position, and then the third motor 34 is started. The third motor 34 drives the first bevel gear 36 to rotate, the first bevel gear 36 drives the second bevel gear 37 to rotate, and the second bevel gear 37 drives the transmission shaft 35 to rotate, so that the transmission shaft 35 drives the ink to be evenly scraped on the printing plate 40. The driving gear 38 is driven to rotate, and the driving gear 38 cooperates with the rack 39 to drive the sliding frame 5 to move. When the sliding frame 5 moves to the top of the second conveyor 8, the ink return knife 22 at this time applies ink on the printing plate 40, and then the third motor 34 is reversed, and the ink return knife 22 is retracted, and the ink scraper 21 is moved to the working position, and the printing roller 3 can be cooperated to print the substrate until the sliding frame 5 moves to the upper part of the third conveyor 9. At this time, the printed substrate can be moved to the third conveyor 9.

[0038] The above, such as Fig. 9As shown, the mounting portion includes a connecting bolt 41, a fixing frame 42, a positioning frame 43 and a pressure head 44. The mounting frame 6 is provided with a connecting bolt 41, which is adapted to the sliding frame 5. The fixing frames 42 are fixedly mounted at the four corners inside the mounting frame 6, the positioning frames 43 are slidably mounted on the four fixing frames 42, and the pressure heads 44 are fixedly mounted at the bottom of the four positioning frames 43. It also includes a knob 45, a driving gear 46, an adjusting nut 47, an adjusting screw 48 and a driven gear 49. The four fixing frames 42 are rotatably mounted with the knob 45, the driving gear 46 is fixedly mounted inside the four knobs 45, the adjusting nuts 47 are fixedly mounted on the four positioning frames 43, the adjusting screws 48 are rotatably mounted on the four fixing frames 42, the adjusting screws 48 are threadedly matched with the adjusting nuts 47, the four adjusting screws 48 are fixedly mounted with driven gears 49, and the driven gears 49 are meshed with the driving gear 46.

[0039] Specifically, when installing the printing plate 40, first place the printing plate 40 on the sliding frame 5, then move the mounting frame 6 to the mounting position, then the position between the mounting frame 6 and the sliding frame 5 can be fixed by the connecting bolts 41, and then the knobs 45 are respectively turned, the knobs 45 drive the active gear 46 to rotate, the active gear 46 drives the driven gear 49 to rotate, the driven gear 49 drives the adjusting screw 48 to rotate, thereby driving the adjusting nut 47 to move, thereby driving the positioning frame 43 to move on the fixing frame 42 through the adjusting nut 47, thereby driving the pressure head 44 to move through the positioning frame 43 until the pressure head 44 contacts the frame of the printing plate 40, the position of the printing plate 40 can be fixed, and the knob 45 can be adjusted separately, so as to fine-tune the position of the printing plate 40, thereby improving the printing quality.

[0040] To sum up, when printing on a substrate, the printing plate 40 is first installed. When installing the printing plate 40, the printing plate 40 is first placed on the sliding frame 5. At this time, the mounting frame 6 is moved to the installation position. At this time, the position between the mounting frame 6 and the sliding frame 5 can be fixed by the connecting bolts 41, and then the knobs 45 are respectively turned, and the knobs 45 drive the active gear 46 to rotate, and the active gear 46 drives the driven gear 49 to rotate, and the driven gear 49 drives the adjusting screw 48 to rotate, thereby driving the adjusting nut 47 to move, thereby driving the positioning frame 43 to move on the fixing frame 42 through the adjusting nut 47, and thereby driving the pressure head 44 to move through the positioning frame 43 until the pressure head 44 contacts the frame of the printing plate 40, and the position of the printing plate 40 can be fixed, and the knob 45 can be adjusted separately, so as to fine-tune the position of the printing plate 40, thereby improving the printing quality.

[0041] Then, the substrate to be printed is placed on the first conveyor 7 in sequence through the external loading equipment, the first conveyor 7 and the second conveyor 8 are started, and the substrate placed on the first conveyor 7 is conveyed to the position of the correction frame 10 through the second conveyor 8. At this time, the edge of the substrate is close to the position of the printing roller 3. When the substrate is close to the printing roller 3 under the action of the second conveyor 8, the position of the substrate can be adjusted under the action of the correction plate 11 and the first spring 12 to avoid the printed pattern from being offset during printing.

[0042] When printing on a substrate, it is necessary to move the movable frame 14 to a set position, at which time the second motor 16 is started, the second motor 16 drives the transmission screw 15 to rotate, the transmission screw 15 drives the transmission nut 17 to move, and the movement of the transmission nut 17 drives the movable frame 14 to move until the movable frame 14 is moved to the set position, then the second motor 16 can be turned off and locked, the position of the movable frame 14 is fixed, and printing of the substrate near the printing roller 3 can begin.

[0043] Before printing on the substrate, the ink needs to be evenly coated on the printing plate 40. At this time, the ink return knife 22 needs to contact with the ink, and the electric cylinder 27 at the corresponding position is started. The output end of the electric cylinder 27 is against the push plate 26, so that the connecting shaft 24 is driven to swing at a certain angle through the push plate 26. When the connecting shaft 24 swings, the connecting frame 25 is driven to swing, so that through the cooperation of the connecting frame 25 and the docking frame 23, the tool holder 20 at the corresponding position is driven to move downward, and the tool holder 20 on the other side is moved upward, and relative sliding occurs between the docking frame 23 and the connecting frame 25. When the tool holder 20 moves to the extreme position, the ink return knife 22 just contacts with the printing plate 40.

[0044] At the same time, the third motor 34 is started, the third motor 34 drives the first bevel gear 36 to rotate, the first bevel gear 36 drives the second bevel gear 37 to rotate, the second bevel gear 37 drives the transmission shaft 35 to rotate, thereby driving the driving gear 38 to rotate through the transmission shaft 35, and the driving gear 38 cooperates with the rack 39 to drive the sliding frame 5 to move. When the sliding frame 5 moves to the top of the second conveyor 8, the ink return knife 22 at this time applies ink on the printing plate 40. When it is necessary to print the substrate, the electric cylinder 27 in the working state is retracted, and the electric cylinder 27 on the other side is started to move, and the connecting shaft 24 is swung in the opposite direction through the push plate 26 until the ink scraper 21 contacts the printing plate 40, and printing can start.

[0045] At this time, the third motor 34 is reversed, the ink return knife 22 is retracted, the ink scraper 21 is moved to the working position, and the first motor 4 is started at the same time. The first motor 4 drives the printing roller 3 to rotate, and the printing roller 3 can cooperate with the printing roller 3 to print the substrate until the sliding frame 5 moves to the upper part of the third conveyor 9. At this time, the printed substrate can be moved to the third conveyor 9. The printed substrate will be moved into the third conveyor 9 under the action of the printing roller 3, and then the third conveyor 9 is started to move the printed substrate into the next link.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully automatic drum screen printing machine, characterized in that: include: Fixed frame (1); A printing frame (2), the printing frame (2) being fixedly mounted on the upper part of the fixed frame (1); A conveying assembly, the conveying assembly being mounted on the printing machine frame (2) and being used for conveying printed articles; A positioning component, the positioning component being mounted on the printing machine frame (2); A printing roller (3), the printing roller (3) being fixedly mounted inside the printing frame (2); A first motor (4), the first motor (4) being fixedly mounted on the printing machine frame (2), and an output end of the first motor (4) being fixedly connected to the printing roller (3); an ink scraping assembly, the ink scraping assembly being mounted on the positioning assembly, the ink scraping assembly being located on the upper part of the printing roller (3) and being used for printing, wherein the positioning assembly is used to adjust the position of the ink scraping assembly; A sliding frame (5), the sliding frame (5) being slidably mounted on the printing machine frame (2); A mounting frame (6), the mounting frame (6) being rotatably mounted on the sliding frame (5); A printing component, the printing component is mounted on the sliding frame (5), the printing component is located between the printing roller (3) and the ink scraping component, and is used for printing.

2. The fully automatic drum screen printing machine according to claim 1, characterized in that: The conveying assembly comprises: A first conveyor (7), the first conveyor (7) being fixedly installed at the feed position of the printing machine frame (2); a second conveyor (8), the second conveyor (8) being fixedly mounted on the printing machine frame (2), the second conveyor (8) being arranged at an angle, and the second conveyor (8) being located between the first conveyor (7) and the printing cylinder (3); A third conveyor (9), the third conveyor (9) being fixedly mounted at the discharge of the printing machine frame (2); A correction unit, the correction unit is installed on the printing machine frame (2), and the correction unit is located between the second conveyor (8) and the printing cylinder (3).

3. The fully automatic drum screen printing machine according to claim 2, characterized in that: The correction unit comprises: A correction frame (10), the correction frame (10) being fixedly mounted on the printing machine frame (2), the correction frame (10) being located between the second conveyor (8) and the printing cylinder (3); A correction plate (11), two correction plates (11) being symmetrically and rotatably mounted on the correction frame (10); A first spring (12) is fixedly mounted between the two correction plates (11) and the correction frame (10).

4. The fully automatic drum screen printing machine according to claim 3, characterized in that: The positioning component comprises: A support frame (13), two of the support frames (13) being symmetrically and fixedly mounted on the printing machine frame (2); A movable frame (14), the movable frame (14) being slidably mounted between the two support frames (13); A transmission screw (15), the transmission screw (15) being rotatably mounted on both of the two support frames (13); a second motor (16), the second motor (16) being fixedly mounted on each of the two support frames (13), the output end of the second motor (16) being fixedly connected to the transmission screw rod (15); A transmission nut (17), wherein the two transmission screw rods (15) are both threadedly sleeved with the transmission nut (17), and the two transmission nuts (17) are respectively fixedly connected to two ends of the moving frame (14).

5. The fully automatic cylinder screen printing machine according to claim 4, characterized in that: The ink scraping assembly comprises: A load-bearing frame (18), wherein the load-bearing frame (18) is fixedly mounted on the mobile frame (14); A partition plate (19), two of which are symmetrically and fixedly mounted inside the supporting frame (18); A tool holder (20), wherein two tool holders (20) are symmetrically and slidably mounted inside the movable frame (14); An ink scraper (21), wherein the ink scraper (21) is detachably mounted on one of the blade holders (20); An ink return knife (22), the ink return knife (22) being detachably mounted on the other knife holder (20); A driving part, the driving part being mounted on the supporting frame (18) and used for driving the two tool holders (20) to move; A locking portion, the locking portion being mounted on the supporting frame (18) and being used to lock the position of the tool holder (20).

6. The fully automatic cylinder screen printing machine according to claim 5, characterized in that: The driving part comprises: A docking frame (23), the docking frame (23) being symmetrically and fixedly mounted on the upper parts of the two tool holders (20); A connecting shaft (24), the connecting shaft (24) being rotatably mounted between the two partitions (19); A connecting frame (25), two connecting frames (25) are symmetrically and fixedly mounted on both sides of the connecting shaft (24), and the connecting frames (25) are slidably connected to the docking frame (23); A push plate (26), the push plate (26) being fixedly mounted on the upper portion of the connecting shaft (24); Electric cylinders (27), a plurality of the electric cylinders (27) are fixedly mounted at equal distances on both sides of the supporting frame (18), and the output ends of the electric cylinders (27) are in contact with the push plate (26).

7. The fully automatic drum screen printing machine according to claim 6, characterized in that: The locking portion comprises: An arc-shaped groove (28), wherein the two partition plates (19) are each provided with the arc-shaped groove (28), and the center position of the arc-shaped groove (28) coincides with the center position of the connecting shaft (24); A slider (29), the sliders (29) being slidably mounted on the two arc-shaped grooves (28), and the sliders (29) being rotatably connected to the push plate (26); A telescopic rod (30), the telescopic rod (30) being fixedly mounted on each of the two sliding blocks (29); A support (31), the other ends of the two telescopic rods (30) are respectively rotatably mounted with the support (31), and the support (31) is fixedly connected to the supporting frame (18); A second spring (32), wherein the second spring (32) is fixedly mounted between the two supports (31) and the slider (29), and the telescopic rod (30) is located inside the second spring (32).

8. The fully automatic cylinder screen printing machine according to claim 7, characterized in that: The printing assembly comprises: A driving frame (33), wherein the driving frames (33) are fixedly mounted on both sides of the sliding frame (5), the two driving frames (33) are symmetrically arranged, and the driving frames (33) are located inside the printing machine frame (2); a third motor (34), the third motor (34) being fixedly mounted on one of the drive frames (33); A transmission shaft (35), the transmission shaft (35) being rotatably mounted between the two drive frames (33); A first bevel gear (36), the first bevel gear (36) being fixedly mounted on an output end of the third motor (34); a second bevel gear (37), the second bevel gear (37) being fixedly mounted on the transmission shaft (35), the second bevel gear (37) being meshed with the first bevel gear (36); A driving gear (38), wherein the driving gear (38) is fixedly mounted on both ends of the transmission shaft (35); Racks (39), two racks (39) are symmetrically and fixedly mounted inside the printing machine frame (2), and the racks (39) are meshed with the driving gear (38); A printing plate (40), wherein the printing plate (40) is arranged on the sliding frame (5); A mounting portion, the mounting portion being mounted on the mounting frame (6) and used to fix the position of the printing plate (40).

9. The fully automatic cylinder screen printing machine according to claim 8, characterized in that: The installation part comprises: A connecting bolt (41), wherein the mounting frame (6) is provided with the connecting bolt (41), and the connecting bolt (41) is adapted to fit the sliding frame (5); A fixing frame (42), the fixing frame (42) being fixedly mounted at four corners inside the installation frame (6); A positioning frame (43), wherein the positioning frame (43) is slidably mounted on each of the four fixing frames (42); A pressure head (44) is fixedly mounted on the bottom of each of the four positioning frames (43).

10. The fully automatic cylinder screen printing machine according to claim 9, characterized in that: Also includes: A knob (45), each of the four fixing frames (42) being rotatably mounted with the knob (45); A driving gear (46), wherein the driving gear (46) is fixedly mounted inside each of the four knobs (45); An adjusting nut (47), the adjusting nut (47) being fixedly mounted on each of the four positioning frames (43); An adjusting screw rod (48), the adjusting screw rod (48) being rotatably mounted on each of the four fixing frames (42), the adjusting screw rod (48) being threadably matched with the adjusting nut (47); A driven gear (49) is fixedly mounted on each of the four adjusting screw rods (48), and the driven gear (49) is meshed with the driving gear (46).

Images