CN115816992B - High-speed round screen printer - Google Patents

Abstract

The invention relates to a high-speed round screen printer, which comprises a paper conveying part, a printing part, a drying part and a paper collecting part which are sequentially arranged, wherein the paper conveying part is used for conveying paper to be printed, the printing part is used for printing the paper, the drying part is used for drying the printed paper, the paper collecting part is used for collecting the dried paper, the printing part comprises a frame, an impression cylinder and a printing mechanism, the impression cylinder and the printing mechanism are arranged on the frame, the impression cylinder is used for receiving the paper transferred by the paper conveying part and driving the paper to rotate, the printing mechanism comprises a screen cylinder mechanism and a scraper mechanism, the scraper mechanism is arranged in the screen cylinder mechanism, the screen cylinder mechanism comprises a supporting part and a screen cylinder, the screen cylinder is supported in the supporting part, ink is arranged in the screen cylinder, and the rotation of the screen cylinder is used for transferring the ink to the paper on the impression cylinder through small holes on the screen cylinder. The invention has reasonable structure and rich functions, realizes high-speed printing of paper and is beneficial to large-scale popularization.

Description

High-speed round screen printer

Technical Field

The invention relates to the technical field of printing equipment, in particular to a high-speed circular screen printer.

Background

The screen printing is to use a screen as a substrate and prepare a screen printing plate with graphics context by a photosensitive plate making method, the screen printing consists of five elements, namely, the screen printing plate, a scraping plate, ink, a printing table and a printing stock, and the basic principle that the graphics context part of the screen printing plate can be penetrated by the ink and the mesh of the non-graphics context part can not be penetrated by the ink is utilized for printing. During printing, ink is led into one end of the screen printing plate, a certain pressure is applied to the ink part on the screen printing plate by the scraping plate, the ink moves at a constant speed towards the other end of the screen printing plate, and the ink is extruded onto a printing stock from the mesh of the image-text part by the scraping plate during the movement.

The above is a structure of a conventional screen printer, and thus it can be seen that the screen plate of the conventional screen printer is substantially planar, and requires a reciprocating motion of a doctor blade or the screen plate during printing, and the mechanical reciprocating motion limits the speed and production efficiency of the screen printer.

Disclosure of Invention

The invention aims to provide a high-speed round screen printer so as to solve the problems of the prior screen printer.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the high-speed round screen printer comprises a paper conveying part, a printing part, a drying part and a paper collecting part which are sequentially arranged, wherein the paper conveying part is used for conveying paper to be printed, the printing part is used for printing the paper, the drying part is used for drying the printed paper, and the paper collecting part is used for collecting the dried paper; the printing part comprises a frame, an impression cylinder and a printing mechanism, wherein the impression cylinder and the printing mechanism are arranged on the frame, the impression cylinder is arranged below the printing mechanism, the impression cylinder is used for receiving paper transmitted by the paper conveying part and driving the paper to rotate, the printing mechanism comprises a screen cylinder mechanism and a scraper mechanism, the scraper mechanism is arranged in the screen cylinder mechanism, the screen cylinder mechanism comprises a supporting part and a screen cylinder, the screen cylinder is supported in the supporting part, the supporting part is arranged on the frame, ink is arranged in the screen cylinder, and the rotation of the screen cylinder is used for transferring the ink to the paper on the impression cylinder through small holes on the screen cylinder; the machine frame comprises a first external wall plate and a second external wall plate, wherein the first external wall plate and the second external wall plate are arranged at intervals, and the impression cylinder is rotatably arranged between the first external wall plate and the second external wall plate; the inner side of the first external wall panel is provided with a first internal wall panel, the inner side of the second external wall panel is provided with a second internal wall panel, and the supporting part is arranged on the first internal wall panel and the second internal wall panel.

Further preferably, the impression cylinder is provided with a paper gripping mechanism, the impression cylinder carries paper through the paper gripping mechanism, a notch is formed in the impression cylinder along the axial direction, the paper gripping mechanism is arranged in the notch, the paper gripping mechanism comprises a fixed guard plate, a movable guard plate and a gripper, the fixed guard plate is fixed on one side of the notch, the movable guard plate is rotationally arranged on the other side of the notch, the fixed guard plate and the movable guard plate are provided with profile curved surfaces consistent with the surface of the impression cylinder, the gripper is arranged below the movable guard plate, the gripper is used for clamping paper, and the movable guard plate is used for rotating to avoid the gripper.

Further preferably, the gripper is mounted on a gripper shaft, the gripper shaft is arranged in the notch along the axial direction of the impression cylinder, one end of the impression cylinder is provided with a gripper cam, the end part of the gripper shaft is connected with a gripper driving mechanism, and the gripper driving mechanism rotates along the surface of the gripper cam to drive the gripper to open or close; the gripper driving mechanism comprises a gripper roller bearing and a gripper swing arm, one end of the gripper swing arm is connected with the gripper shaft, the gripper roller bearing is arranged at the other end of the gripper swing arm, and the gripper roller bearing is in butt joint with the gripper cam; the movable guard board is arranged on a guard board shaft, the guard board shaft is arranged in the gap along the axial direction of the impression cylinder, the other end of the impression cylinder is provided with a plate opening cam, the end part of the guard board shaft is connected with a guard board driving mechanism, and the guard board driving mechanism rotates along the surface of the plate opening cam to drive the movable guard board to open or close; the guard plate drive comprises an opening plate roller bearing and an opening plate swing arm, one end of the opening plate swing arm is connected with the guard plate shaft, the opening plate roller bearing is installed at the other end of the opening plate swing arm, and the opening plate roller bearing is in butt joint with the opening plate cam.

Further preferably, the scraper mechanism comprises a scraper, a whole scraper lifting mechanism, a scraper angle fine tuning mechanism, a scraper height fine tuning mechanism and a scraper translation mechanism, wherein the whole scraper lifting mechanism, the scraper angle fine tuning mechanism, the scraper height fine tuning mechanism and the scraper translation mechanism are all arranged on the first inner wallboard and the second inner wallboard, the whole scraper lifting mechanism is used for controlling the scraper to move up and down, the scraper angle fine tuning mechanism is used for adjusting the angle of the scraper, the scraper height fine tuning mechanism is used for adjusting the upper and lower positions of the scraper, and the scraper translation mechanism is used for adjusting the position of the scraper in the radial direction of the screen drum.

Further preferably, the scraper is arranged in a scraper supporting swing arm, the middle position of the scraper supporting swing arm is hinged to the first inner wallboard and the second inner wallboard, and the scraper supporting swing arm is connected with the scraper integral lifting mechanism; the scraper integral lifting mechanism comprises a lifting cylinder, a cam and a cam connecting rod, wherein the lifting cylinder is connected to the first inner wallboard and the second inner wallboard and is connected with the cam connecting rod, the cam connecting rod is connected with the cam, the cam is abutted to the scraper supporting swing arm, and the lifting cylinder is used for driving the scraper supporting swing arm to swing up and down so as to lift the scraper; the scraper angle fine adjustment mechanism comprises an angle adjustment hand wheel and an angle adjustment connecting rod, a first mounting seat is arranged on the first inner wall plate and the second inner wall plate, the angle adjustment hand wheel is in threaded connection with the first mounting seat, one end of the angle adjustment connecting rod is hinged with the end part of the angle adjustment hand wheel, a scraper clamping shaft is arranged in the scraper support swing arm, the end part of the scraper is clamped with the scraper clamping shaft, a hinging seat is arranged on the scraper clamping shaft, the other end of the angle adjustment connecting rod is hinged with the hinging seat, and the rotation of the angle adjustment hand wheel is used for driving the scraper clamping shaft to rotate; the scraper height fine adjustment mechanism comprises a height adjustment hand wheel and a height adjustment connection, a second installation seat is arranged on the first inner wallboard and the second inner wallboard, the height adjustment hand wheel is in threaded connection with the second installation seat, one end of a height adjustment connecting rod is hinged with the end part of the height adjustment hand wheel, a scraper shaft fixing block is arranged on a scraper clamping shaft, the upper side surface of the scraper shaft fixing block is a slope, the other end of the height adjustment connecting rod is connected with a wedge block, the wedge block is in butt joint with the upper side surface of the scraper fixing block, and the rotation of the height adjustment hand wheel is used for driving the scraper clamping shaft to move up and down; the scraper translation mechanism comprises a translation adjusting hand wheel and a translation adjusting connecting rod, a third installation seat is arranged on the first inner wallboard and the second inner wallboard, the translation adjusting hand wheel is in threaded connection with the third installation seat, one end of the translation adjusting connecting rod is hinged with the end part of the translation adjusting hand wheel, the other end of the translation adjusting connecting rod is connected with the scraper shaft fixing block, and the rotation of the translation adjusting hand wheel is used for driving the scraper clamping shaft to translate; the scraper shaft is connected with a scraper placing mechanism, the scraper placing mechanism comprises a guide rail, a clamping hook is arranged on the guide rail, the scraper comprises a scraper body and a scraper shaft, the scraper body is arranged below the scraper shaft, the scraper shaft is connected with the clamping hook in a clamping manner, one end of the scraper shaft is provided with a clamping pin, a corresponding oblique groove is formed in the scraper clamping shaft, the scraper shaft is connected with the scraper clamping shaft through the clamping pin, a guide rail supporting seat is arranged on the outer side of the first inner wall plate, a guide rail supporting seat is arranged on the guide rail supporting seat, the guide rail is clamped on the guide rail supporting seat through the guide rail supporting seat, and a handle for pulling out the guide rail is arranged at one end of the guide rail.

Still preferably, the screen cylinder comprises a screen plate and end rings, the end rings are arranged at two ends of the screen plate and detachably connected with the supporting part, a circumferential alignment mechanism, an axial alignment mechanism and an ink leakage prevention mechanism are arranged on the frame, the circumferential alignment mechanism comprises a first servo motor, a bevel gear and a bevel gear axial movement mechanism, and the first servo motor is in transmission connection with the bevel gear axial movement mechanism and is used for driving the bevel gear to move axially; the axial alignment mechanism comprises a second servo motor and a silk screen roller axial moving mechanism, the silk screen roller axial moving mechanism is connected with the supporting portion, the second servo motor is in transmission connection with the silk screen roller axial moving mechanism and used for driving the silk screen roller supporting mechanism to move axially, the ink leakage prevention mechanism comprises a third motor, a transmission shaft and a clutch mechanism, the transmission shaft is rotationally arranged between the frames, a first driving gear is arranged on the transmission shaft, the first driving gear is in transmission connection with the supporting portion, and the clutch mechanism is used for cutting off or connecting the first driving gear and power transmission of the supporting portion.

Further preferably, the helical gear axial moving mechanism comprises a first supporting seat, the first supporting seat is arranged on the outer side of the first external wall panel, the first servo motor is arranged on the first supporting seat, a first transmission gear is connected with an output shaft of the first servo motor in a transmission mode, a first ball screw is arranged in the first supporting seat, the first transmission gear is coaxially arranged with one end of the first ball screw, a helical gear is connected with the other end of the first ball screw, an impression roller driving gear is connected with the helical gear in a transmission mode, and rotation of the first transmission gear is used for driving the helical gear to move axially.

Still preferably, the screen cylinder axial moving mechanism comprises a second supporting seat, the second supporting seat is arranged on the outer side of the first external wall plate, the second servo motor is arranged on the second supporting seat, an output shaft of the second servo motor is in transmission connection with a second transmission gear, a second ball screw is arranged in the second supporting seat, the second transmission gear is coaxially arranged with one end of the second ball screw, a sliding seat is slidably arranged on the first external wall plate, one end of the sliding seat is connected with the supporting portion, the other end of the sliding seat is connected with the second ball screw, and rotation of the second transmission gear is used for driving the sliding seat to axially move; the clutch mechanism comprises a tooth clutch and a friction clutch, wherein the tooth clutch is arranged at one end of the transmission shaft, the friction clutch is arranged at the other end of the transmission shaft, and the friction clutch is in transmission connection with the third motor.

Further preferably, the support parts are two, namely a first support part and a second support part, the first support part is arranged on the first inner wall plate, the second support part is arranged on the second inner wall plate, the first support part comprises a support sleeve and a gear ring, the gear ring is rotatably arranged on the support sleeve through a bearing and is in transmission connection with the first driving gear, a first outer support ring is sleeved on the periphery of the gear ring, the first outer support ring is connected with the sliding seat, the lower end of the gear ring is provided with a fixed plate, the fixed plate is provided with fixed claws, the fixed claws are provided with two, the fixed claws are respectively arranged at two ends of the fixed plate, the gear ring is further rotatably provided with a movable clamping ring, the movable clamping claws are arranged on the movable clamping ring, the end ring is provided with corresponding clamping grooves, the end ring is connected with the gear ring through movable claws through a ball head, the movable clamping claws are provided with positioning holes, and the positioning holes are internally provided with ball plungers, and the movable claws are connected with the clamping claws through the ball heads.

Further preferably, the second supporting part comprises a second outer supporting ring, a tensioning cylinder is arranged between the second outer supporting ring and the frame, one end of the tensioning cylinder is connected with the second inner wallboard, the other end of the tensioning cylinder is connected with the second outer supporting ring, a plurality of tensioning cylinders are arranged, and the tensioning cylinders are circumferentially arranged on the second outer supporting ring.

The invention has the beneficial effects that:

according to the high-speed round screen printer, paper is conveyed through the paper conveying part and rotates after being meshed by the impression cylinder of the printing part, the printing mechanism comprises the screen cylinder mechanism and the scraper mechanism, the scraper mechanism presses down to press the screen cylinder against the impression cylinder during printing, the screen cylinder rotates and the impression cylinder rotates to press ink between the scraper mechanism and the screen cylinder from small holes corresponding to patterns on the screen cylinder to the paper meshed by the impression cylinder, so that printing of the paper is realized, after printing is finished, the paper is dried in the drying part, the printing effect is ensured, and the paper after drying is conveyed into the paper collecting part, so that high-speed printing of the paper is finished.

Drawings

FIG. 1 is a schematic view of a high speed circular screen printer of the present invention;

FIG. 2 is a schematic view of the structure of a printing section in the high-speed circular screen printer of the present invention;

FIG. 3 is a schematic view of the structure of the impression cylinder in the high-speed round screen printer of the present invention;

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a schematic view of the structure of FIG. 3 at another angle;

FIG. 6 is a schematic view of the structure at A in FIG. 5;

FIG. 7 is a schematic view of the structure of the high-speed circular screen printer of the present invention with the stationary and movable shields removed from the impression cylinder;

FIG. 8 is a schematic view of the structure at B in FIG. 7;

FIG. 9 is a schematic view of a screen cylinder in a high speed circular screen printer according to the present invention;

FIG. 10 is a schematic view of C-C of FIG. 9;

FIG. 11 is a schematic view of D-D of FIG. 9;

FIG. 12 is a schematic view of a circumferential registration mechanism in a high speed circular screen printer according to the present invention;

FIG. 13 is a schematic view of an axial registration mechanism in a high speed circular screen printer according to the present invention;

fig. 14 is a schematic view showing the structure of a screen cylinder in the high-speed round screen printer of the present invention;

fig. 15 is a schematic structural view (perspective view) of the screen cylinder and the first and second supporting portions in the high-speed round screen printer of the present invention;

fig. 16 is a schematic view (exploded view) of a screen cylinder and first and second support portions in a high-speed circular screen printer according to the present invention;

fig. 17 is a schematic view showing the structure of a doctor blade mechanism and a screen cylinder mechanism in the high-speed round screen printer of the present invention;

FIG. 18 is a schematic view showing the structure of a doctor blade mechanism in the high-speed circular screen printer of the present invention;

FIG. 19 is a schematic view of the structure of E-E in FIG. 18;

FIG. 20 is a schematic view of the alternate angle of FIG. 18;

fig. 21 is a schematic view of the structure at F in fig. 20;

fig. 22 is a schematic diagram of the structure at G in fig. 20.

Name corresponding to each label in the figure:

1. a paper feeding section;

2. a printing section;

3. a drying part;

4. a paper collection part;

5. impression cylinder, 51, paper-biting mechanism, 511, fixed guard plate, 512, movable guard plate, 513, gripper, 514, gripper shaft, 52, notch, 53, gripper cam, 54, gripper driving mechanism, 541, gripper roller bearing, 542, gripper swing arm, 55, platen cam, 56, guard plate driving mechanism, 561, platen roller bearing, 562, platen swing arm, 57, guard plate shaft, 571, guard plate mount pad, 572, avoidance slot;

6. screen cylinder mechanism, 61, screen cylinder, 611, screen plate, 612, end ring, 613, clamping groove, 62, first support, 621, support sleeve, 622, ring gear, 623, first outer support ring, 624, fixed plate, 6241, fixed jaw, 625, movable snap ring, 6251, movable jaw, 6252, positioning hole, 6253, ball plunger, 63, second support, 631, second outer support ring, 632, tensioning cylinder, 64, circumferential registration mechanism, 641, first servo motor, 642, helical gear, 643, first support seat, 644, first drive gear, 645, first ball screw, 65, axial registration mechanism, 651, second servo motor, 652, second support seat, 653, second drive gear, 654, second ball screw, 66, ink leakage prevention mechanism, 661, third motor, 662, drive shaft, 663, first drive gear, 664, tooth clutch, 665, friction clutch;

7. Doctor mechanism, 71, doctor, 711, doctor body, 712, doctor shaft, 7121, bayonet lock, 72, doctor integral lifting mechanism, 721, doctor support swing arm, 7211, housing frame, 7212, spring, 722, lifting cylinder, 723, cam, 724, cam link, 725, stopper, 726, rebound cylinder, 73, doctor angle fine adjustment mechanism, 731, angle adjustment hand wheel, 732, angle adjustment link, 733, first mount, 734, doctor bayonet shaft, 7341, doctor shaft fixing block, 7342, diagonal slot, 735, hinge mount, 74, doctor height fine adjustment mechanism, 741, height adjustment hand wheel, 742, height adjustment link, 743, second mount, 744, wedge, 75, doctor translation mechanism, 751, translation adjustment hand wheel, 752, translation adjustment link, 753, third mount, 76, doctor placement mechanism, 761, guide rail, 7611, bayonet hook, 7612, handle, 762, guide rail support, 763, guide rail support, 764, swivel hand wheel;

8. the frame, 81, first outer wallboard, 811, sliding seat, 82, second outer wallboard, 83, first inner wallboard, 84, second inner wallboard.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1 of the present invention:

the high-speed round screen printer in the embodiment realizes the printing of paper through the matching of the paper conveying part, the printing part, the drying part and the paper collecting part, and realizes the high-speed printing of the paper through the matching of the press printing cylinder and the printing mechanism in the printing part.

In this embodiment, as shown in fig. 1, the high-speed circular screen printer includes a paper feeding portion 1, a printing portion 2, a drying portion 3 and a paper collecting portion 4, where the paper feeding portion 1, the printing portion 2, the drying portion 3 and the paper collecting portion 4 are sequentially arranged, the paper feeding portion 1 is used for conveying paper to be printed, the printing portion 2 is used for performing a printing process of the paper, the printed paper is dried by the drying portion 3, and the dried paper is finished by the paper collecting portion 4, so that the next process can be performed. The structures of the paper feeding part 1, the drying part 3 and the paper collecting part 4 belong to the prior art, and are not described herein.

In this embodiment, as shown in fig. 2, the printing section 2 includes a frame 8, an impression cylinder 5 and a printing mechanism, the impression cylinder 5 and the printing mechanism are both provided on the frame 8, the impression cylinder 5 is provided below the printing mechanism, the impression cylinder 5 is capable of receiving a sheet transferred by the sheet feeding section 1 and driving the sheet to rotate, the printing mechanism includes a screen cylinder mechanism 6 and a doctor mechanism 7, the doctor mechanism 7 is provided in the screen cylinder mechanism 6, the screen cylinder mechanism 6 includes a supporting section and a screen cylinder 61, the screen cylinder 61 is supported in the supporting section, the supporting section is provided on the frame 8, in actual use, an ink is provided in the screen cylinder 61, and in rotation of the screen cylinder 61, the ink is transferred to the sheet of the impression cylinder 5 through the small holes in the screen cylinder 61 by the action of the doctor mechanism 7, thereby realizing the printing function.

In this embodiment, the frame 8 includes a first outer wall plate 81 and a second outer wall plate 82, the first outer wall plate 81 and the second outer wall plate 82 are arranged at intervals, a first inner wall plate 83 is arranged on the inner side of the first outer wall plate 81, a second inner wall plate 84 is arranged on the inner side of the second outer wall plate 82, the impression cylinder 5 is rotatably arranged between the first outer wall plate 81 and the second outer wall plate 82, and the supporting portion is arranged on the first inner wall plate 83 and the second inner wall plate 84.

As shown in fig. 3 to 8, the impression cylinder 5 is provided with the paper gripping mechanism 51, the impression cylinder 5 realizes paper conveyance through the paper gripping mechanism 51, the impression cylinder 5 is provided with the notch 52 along the axial direction, the paper gripping mechanism 51 is arranged in the notch 52, the paper gripping mechanism 51 comprises a fixed guard 511, a movable guard 512 and a gripper 513, the fixed guard 511 is fixed on one side of the notch 52, the movable guard 512 is rotatably arranged on the other side of the notch 52, the fixed guard 511 is fixedly arranged and immovable, the contour curved surface of the fixed guard 511 is kept consistent with the contour curved surface of the impression cylinder 5, so that smooth transition is formed when the doctor 71 presses the screen cylinder 61, the movable guard 512 can rotate in a certain angle, meanwhile, the contour curved surface of the movable guard 512 is kept consistent with the contour curved surface of the impression cylinder 5, so that smooth transition is formed when the doctor 71 presses the screen cylinder 61, the movable guard 513 is arranged below the movable guard 512, the gripper 513 can clamp the paper conveyed by the upper paper conveying part 1, printing is facilitated, the movable gripper 513 is opened when the movable gripper 513 rotates, the movable gripper 513 is opened, interference is avoided when the movable gripper 513 is formed at the position of the movable gripper 513, and the movable gripper 513 is avoided, and the transition is completed, and the transition is avoided when the gripper is formed at the position of the movable gripper 513.

Through the above setting, not only the smooth transition of impression cylinder 5 breach position when printing has been realized, and through the cooperation of fixed backplate 511 and movable backplate 512 for silk screen cylinder 61 is more abundant with fixed backplate 511 and movable backplate 512 contact when scraper 71 pushes down, has guaranteed the evenly distributed of the printing ink of gathering in scraper one side, guarantees the printing effect.

As shown in fig. 4, the gripper 513 is mounted on a gripper shaft 514, the gripper shaft 514 is disposed in the notch 52 along the axial direction of the impression cylinder 5, one end of the impression cylinder 5 is provided with a gripper cam 53, the end of the gripper shaft 514 is connected with a gripper driving mechanism 54, and in actual use, the gripper driving mechanism 54 rotates along the gripper cam 53 as the impression cylinder 5 rotates, so that the gripper 513 can be driven to open or close to achieve gripping of paper.

In the present embodiment, the gripper cam 53 is provided on the second outer wall plate 82 so as not to rotate with the rotation of the impression cylinder 5, thereby enabling the gripper driving mechanism 54 to rotate along the gripper cam 53.

As shown in fig. 4, the gripper driving mechanism 54 includes a gripper roller bearing 541 and a gripper swing arm 542, one end of the gripper swing arm 542 is connected to the gripper shaft 514, the gripper roller bearing 541 is mounted at the other end of the gripper swing arm 542, the gripper roller bearing 541 abuts against the gripper cam 53, and when the impression cylinder 5 rotates, the gripper roller bearing 541 rotates along the gripper cam 53, thereby enabling the gripper 513 to swing up and down with the gripper shaft 514 as an axis to open or close the gripper.

As shown in fig. 5 and 6, the movable guard 512 is mounted on a guard shaft 57, the guard shaft 57 is disposed in the gap 52 along the axial direction of the impression cylinder 5, the other end of the impression cylinder 5 is provided with a plate opening cam 55, the end of the guard shaft 57 is connected with a guard driving mechanism 56, and in actual use, the guard driving mechanism 56 rotates along the plate opening cam 55 along with the rotation of the impression cylinder 5, so that the movable guard 512 can be driven to open or close to shield the gap 52 and avoid the gripper 513.

In the present embodiment, the open plate cam 55 is provided on the first exterior wall plate 81 so as not to rotate with the rotation of the platen roller 5, thereby enabling the shield drive mechanism 56 to rotate along the open plate cam 55.

As shown in fig. 6, the shield driving mechanism 56 includes a plate opening roller bearing 561 and a plate opening swing arm 562, one end of the plate opening swing arm 562 is connected to the shield shaft 57, the plate opening roller bearing 561 is mounted at the other end of the plate opening swing arm 562, the plate opening roller bearing 561 abuts against the plate opening cam 55, and when the platen roller 5 rotates, the plate opening roller bearing 561 rotates along the plate opening cam 55, so that the movable shield 512 can rotate about the shield shaft 57, thereby opening or closing the notch 52.

When the movable guard 512 does not block the notch 52, the movable guard 512 can be accommodated under the fixed guard 511.

As shown in fig. 8, the guard shaft 57 is disposed below the gripper shaft 514, the guard shaft 57 is provided with a guard mounting seat 571, the movable guard 512 is mounted on the guard shaft 57 through the guard mounting seat 571, and meanwhile, in order to avoid interference between the guard mounting seat 571 and the gripper shaft 514, the guard mounting seat 571 is provided with an avoiding groove 572, and the avoiding groove 572 plays a role of avoiding the gripper shaft 514.

In actual production, the screen cylinder 61 is often required to be replaced according to the printing requirement, the position of the printing pattern on the screen cylinder 61 is required to be adjusted back and forth and left and right according to the printing condition, the tension of the screen printing plate 611 is required to be adjusted, and when the high-speed screen printer stops working or the screen cylinder is dismounted, the ink in the screen cylinder 61 cannot leak from the screen cylinder 61, and the screen cylinder mechanism 6 in the embodiment can be adopted to realize the use requirement.

In this embodiment, the screen cylinder 61 includes a screen plate 611 and end rings 612, the end rings 612 are provided at both ends of the screen plate 611 and detachably connected to the support portions, and when the screen plate 611 is positioned by a fixture in actual installation, the screen plate 611 and the end rings 612 are adhered by glue, thereby forming the screen cylinder 61.

In this embodiment, two support portions are provided, denoted as a first support portion 62 and a second support portion 63, the first support portion 62 is provided on the first inner wall plate 83, the second support portion 63 is provided on the second inner wall plate 84, the first outer inner wall plate is provided with the circumferential alignment mechanism 64 and the axial alignment mechanism 65, and the first inner wall plate 83 and the second inner wall plate 84 are provided with the ink leakage prevention mechanism 66, thereby realizing the circumferential alignment, the axial alignment and the ink leakage prevention functions of the screen cylinder.

As shown in fig. 12, the circumferential alignment mechanism 64 includes a first servo motor 641, a bevel gear 642 and a bevel gear axial movement mechanism, the first servo motor 641 is connected with the bevel gear axial movement mechanism, the bevel gear axial movement mechanism is connected with the bevel gear 642, rotation of the first servo motor 641 can drive the bevel gear 642 to move axially through the bevel gear axial movement mechanism, an impression cylinder gear is arranged on the first external wall plate 81, the impression cylinder gear is in driving connection with the impression cylinder 5, the impression cylinder gear is also of a bevel gear design, and when the bevel gear 642 moves axially, circumferential movement of each other is caused between the bevel gear 642 and the impression cylinder 5 gear, thereby realizing circumferential adjustment of screen printing images and texts, and realizing circumferential alignment of printing.

In this embodiment, the helical gear axial moving mechanism includes a first supporting seat 643, the first supporting seat 643 is disposed outside the first external wall board 81, the output shaft of the first servo motor 641 is in transmission connection with a first transmission gear 644, a first ball screw 645 is disposed in the first supporting seat 643, the first transmission gear 644 is coaxially disposed with one end of the first ball screw 645, the other end of the first ball screw 645 is connected with a helical gear 642, when the first servo motor 641 rotates, the first ball screw 645 can be driven to rotate through the first transmission gear 644, so that the first ball screw 645 drives the helical gear 642 to axially move, axial adjustment of the helical gear 642 can be achieved, and circumferential adjustment of graphics and texts of the screen printing plate 611 is achieved.

The axial alignment mechanism 65 comprises a second servo motor 651 and a screen cylinder axial movement mechanism, the screen cylinder axial movement mechanism is connected with the first supporting portion 62, the second servo motor 651 can drive the first supporting portion 62 to axially move through the screen cylinder axial movement mechanism, and further the screen cylinder 61 is driven to axially move, so that axial alignment of screen printing graphics and texts is achieved.

In this embodiment, as shown in fig. 9 to 13, the screen cylinder axial moving mechanism includes a second supporting seat 652, the second supporting seat 652 is disposed outside the first external wall board 81, a second servo motor 651 is disposed on the second supporting seat 652, an output shaft of the second servo motor 651 is in transmission connection with a second transmission gear 653, a second ball screw 654 is disposed in the second supporting seat 652, the second transmission gear 653 is coaxially disposed at one end of the second ball screw 654, a sliding seat 811 is slidably disposed on the first external wall board 81, one end of the sliding seat 811 is connected with the first supporting portion 62, the other end is connected with the second ball screw 654, and when the second servo motor 651 rotates, the second ball screw 654 can be driven to rotate by the second transmission gear 653, so that the second ball screw 654 drives the sliding seat 811 to axially move, so as to realize axial adjustment of the screen cylinder, thereby axially registering the screen printing images and texts.

As shown in fig. 13, the ink leakage preventing mechanism 66 includes a third motor 661, a transmission shaft 662 and a clutch mechanism, the third motor 661 is arranged outside the second external wall board 82, the third motor 661 adopts a gear motor, the transmission shaft 662 is rotatably arranged between the first external wall board 81 and the second external wall board 82 and is arranged at intervals with the screen cylinder 61, a first driving gear 663 is arranged on the transmission shaft 662, the first driving gear 663 is provided with two, and is respectively in transmission connection with the first supporting part 62 and the second supporting part 63, the power of the transmission shaft is input through a host, the first driving gear 663 is used for driving the first supporting part 62 and the second supporting part 63 to rotate, and then the screen cylinder 61 is driven to rotate, and by arranging the clutch mechanism, the power transmission of the first driving gear 663 and the screen cylinder 61 can be controlled, and the ink leakage preventing function is realized by matching with the third motor 661.

Specifically, the clutch mechanism includes a tooth clutch 664 and a friction clutch 665, the tooth clutch 664 is disposed on the transmission shaft 662 and is located on the first side wall plate 81, the friction clutch 665 is disposed on the transmission shaft 662 and is located on the second side wall plate 82, wherein the friction clutch 665 is in driving connection with the third motor 661, when in actual operation, the screen printing plate 611 needs to be rotated downwards to a non-graphic part, if the graphic part is downwards to cause ink leakage phenomenon, thereby polluting equipment and products, when the equipment is operated, the tooth clutch 664 is in a closed state, the friction clutch 665 is in a disengaged state, when the equipment is operated, the third motor 661 is not operated, power cannot be transmitted to the transmission shaft 662, when the equipment is stopped, the tooth clutch 664 is in a disengaged state, and the friction clutch 665 is in an engaged state, when the third motor 661 is operated, the power is transmitted to the transmission shaft 662, the transmission shaft 662 drives the first supporting part 62 and the second supporting part 63 to rotate through the first driving gear 663, the screen drum is rotated upwards to stop working after the graphic part, when the equipment is started again, the tooth clutch 664 is closed, and the normal printing procedure is not affected.

As shown in fig. 14-16, the first supporting portion 62 includes a supporting sleeve 621 and a gear ring 622, the gear ring 622 is rotatably disposed on the supporting sleeve 621 through a bearing, a first outer supporting ring 623 is sleeved on the periphery of the gear ring 622, a notch 52 is disposed on the first supporting ring, the gear ring 622 can be exposed to a part, the gear ring 622 is convenient to drive with a first driving gear 663 on a transmission shaft 662, the first outer supporting ring 623 is connected with a sliding seat 811, meanwhile, a fixed plate 624 is disposed at the lower end of the gear ring 622, the fixed plate 624 is arc-shaped and is matched with the outline of the gear ring 622, fixed jaws 6241 are disposed on the fixed plate 624, two fixed jaws 6241 are disposed at two ends of the fixed plate 624, a movable snap ring 625 is rotatably disposed on the gear ring 622, movable snap ring 625 is disposed on the movable snap ring 6251, the fixed jaws 6241 and the movable jaws 6251 are used for mounting the end ring 612, when the end ring 612 is required to be mounted in actual use, the opening range of the movable snap ring 625 exceeds a semicircle, and thus the end ring 612 can be placed on the end ring 612, and the two jaws 6241 are clamped and fastened with the movable jaws 6251 when the end ring 612 are placed on the end ring 612, and the movable jaw 6241 is conveniently and the movable jaw 6251 is rotatably mounted.

As shown in fig. 15, a positioning hole 6252 is formed in the movable claw 6251, a ball plunger 6253 is disposed in the positioning hole 6252, and after the end ring 612 is mounted in place, the movable claw 6251 is positioned by the ball plunger 6253, so that the accuracy of the mounting of the end ring 612 is ensured.

As shown in fig. 16, the structure of the second support 63 is substantially identical to that of the first support 62, except that the first outer support ring 623 in the first support 62 is connected to the slide seat 811, and the second outer support ring 631 in the second support 63 is connected to the tensioning cylinder 632 to realize the tensioning function of the screen cylinder 61.

As shown in fig. 14 and 16, the second supporting portion 63 includes a second outer supporting ring 631, a tensioning cylinder 632 is provided between the second outer supporting ring 631 and the second inner wall plate 84, one end of the tensioning cylinder 632 is connected to the inner side of the second inner wall plate 84, the other end is connected to the second outer supporting ring 631, in this embodiment, a plurality of tensioning cylinders 632 are provided, each tensioning cylinder 632 is circumferentially provided on the second outer supporting ring 631, when the screen cylinder 61 is mounted, the tensioning cylinders 632 are ventilated and stretched, thereby flexible tensioning of the screen plate 611 is achieved, and adjustment of the tension of the tensioning cylinders 632 is achieved by air pressure adjustment.

When the high-speed round screen printer works, as the scraper mechanism 7 is arranged in the screen cylinder mechanism 6, when the scraper 71 moves downwards, the screen cylinder 61 is extruded to the impression cylinder 5, the screen cylinder 61 rotates and the impression cylinder 5 rotates, and the ink between the scraper 71 and the screen cylinder 61 is extruded from the small holes of the corresponding pattern on the screen cylinder 61 to the paper snapped by the impression cylinder 5, so that the high-speed printing of the paper is realized, and in actual use, the position of the scraper needs to be adjusted due to different thicknesses of printing paper, process requirements, image-text sizes and the like. In this embodiment, as shown in fig. 17 to 19, the doctor mechanism 7 includes a doctor 71, a doctor integral lifting mechanism 72, a doctor angle trimming mechanism 73, a doctor height trimming mechanism 74 and a doctor translation mechanism 75, when in actual use, the doctor is located in the screen cylinder, the doctor integral lifting mechanism 72, the doctor angle trimming mechanism 73, the doctor height trimming mechanism 74 and the doctor translation mechanism 75 are all disposed on the first inner wall plate 83 and the second inner wall plate 84, the doctor integral lifting mechanism 72 can control the angle of the doctor 71, the doctor height trimming mechanism 74 can trim the height of the doctor 71, and the doctor translation mechanism 75 can adjust the position of the doctor 71 in the radial direction of the screen cylinder 61, so that the doctor 71 can adjust the position according to different printing requirements.

The following describes each structure in detail with a blade integral lifting mechanism 72, a blade angle fine adjustment mechanism 73, a blade height fine adjustment mechanism 74, and a blade translation mechanism 75 provided on the second inner wall plate 84.

In this embodiment, as shown in fig. 18, the doctor 71 is disposed in the doctor supporting swing arm 721, the doctor supporting swing arm 721 plays a supporting role on the doctor 71, and meanwhile, the doctor supporting swing arm 721 can cooperate with the doctor integral lifting mechanism 72 to realize lifting of the doctor 71, the middle position of the doctor supporting swing arm 721 is hinged on the second inner wall plate 84, the doctor supporting swing arm 721 is connected with the doctor integral lifting mechanism 72, the doctor integral lifting mechanism 72 includes a lifting cylinder 722, a cam 723 and a cam link 724, the lifting cylinder 722 is connected on the second inner wall plate 84 and is connected with the cam link 724, the cam link 724 is connected with the cam 723, meanwhile, the cam 723 abuts against the upper side surface of the doctor supporting swing arm 721, when the lifting cylinder 722 extends, the cam link 724 swings, and then the cam 723 presses the doctor supporting swing arm 721, the doctor supporting swing arm 721 swings with the hinge shaft as the shaft, thereby lifting the doctor 71 disposed in the doctor supporting swing arm 721, and completing the release of the doctor 71, otherwise realizing the combination of the doctor 71.

As shown in fig. 18, a limiter 725 is further provided at the edge of the first inner wall plate 83, and the limiter 725 is located above and below the end of the scraper supporting swing arm 721, and can limit the up-and-down swing of the scraper supporting swing arm 721, so as to avoid bouncing of the scraper supporting swing arm 721, and meanwhile, a rebound cylinder 726 is further provided on the first inner wall plate 83, and the rebound cylinder 726 is connected with the scraper supporting swing arm 721, so that the action can be shortened, and quick release and engagement can be realized by setting the rebound cylinder 726.

As shown in fig. 18 and 21, the doctor angle fine adjustment mechanism 73 includes an angle adjustment hand wheel 731 and an angle adjustment connecting rod 732, a first mounting seat 733 is provided on the second inner wall plate 84, the angle adjustment hand wheel 731 is in threaded connection with the first mounting seat 733, one end of the angle adjustment connecting rod 732 is hinged with the end of the angle adjustment hand wheel 731, a doctor clamping shaft 734 is provided in the doctor support swing arm 721, the end of the doctor 71 is clamped with the doctor clamping shaft 734, a hinge seat 735 is provided on the doctor clamping shaft 734, the other end of the angle adjustment connecting rod 732 is hinged with the hinge seat 735, when the angle adjustment hand wheel 731 is rotated, the angle adjustment connecting rod 732 moves along with it, the hinge seat 735 is pulled to turn over, and the doctor clamping shaft 734 is turned over, thereby adjusting the angle of the doctor.

As shown in fig. 18, the doctor blade height fine adjustment mechanism 74 includes a height adjustment hand wheel 741 and a height adjustment link 742, a second mounting seat 743 is provided on the second inner wall plate 84, the second mounting seat 743 is located below the first mounting seat 733, the height adjustment hand wheel 741 is in threaded connection with the second mounting seat 743, one end of the height adjustment link 742 is hinged to an end of the height adjustment hand wheel 741, a doctor blade shaft fixing block 7341 is provided on the doctor blade clamping shaft 734, an upper side surface of the doctor blade shaft fixing block 7341 is a slope, the other end of the height adjustment link 742 is connected with a wedge block 744, the wedge block 744 abuts against an upper side surface of the doctor blade shaft fixing block 7341, when the height adjustment hand wheel 741 rotates, the height adjustment link 742 moves along with the wedge block 744 to push and pull the wedge block 744 to drive the doctor blade shaft fixing block 7341 to move up and down, thereby adjusting the height of the doctor blade.

In this embodiment, the doctor supporting swing arm 721 is provided with a housing frame 7211, the doctor shaft fixing block 7341 and the wedge block 744 are both located in the housing frame 7211, the bottom and the side of the housing frame 7211 are further provided with a spring 7212, and the spring 7212 abuts against the side and the bottom of the doctor shaft fixing block 7341, so that the doctor shaft fixing block 7341 is ensured to be able to stably move in the housing frame 7211.

As shown in fig. 19, the doctor translation mechanism 75 includes a translation adjusting hand wheel 751 and a translation adjusting link 752, a third mounting seat 753 is disposed on the second inner wall plate 84, the third mounting seat 753 is located below the second mounting seat 743, the translation adjusting hand wheel 751 is in threaded connection with the third mounting seat 753, one end of the translation adjusting link 752 is hinged to an end portion of the translation adjusting hand wheel 751, the other end of the translation adjusting link 752 is connected to a doctor shaft fixing block 7341, and when the translation adjusting hand wheel 751 rotates, the translation adjusting hand wheel 751 moves along with the translation adjusting hand wheel 751 to push and pull the doctor shaft fixing block 7341, so that the doctor shaft fixing block 7341 translates in the accommodating frame 7211.

In practical use, the doctor 71 extends into the screen cylinder 61, so that the doctor 71 needs to be installed after the screen cylinder 61 is installed, in this embodiment, in order to facilitate installation of the doctor 71, a doctor placement mechanism 76 is provided, as shown in fig. 20-22, the doctor placement mechanism 76 includes a guide rail 761, a clamping hook 7611 is provided on the guide rail 761, the doctor 71 includes a doctor body 711 and a doctor shaft 712, the doctor body 711 is provided below the doctor shaft 712, the doctor shaft 712 is connected with the clamping hook 7611 in a clamping manner, one end of the doctor shaft 712 is provided with a clamping pin 7121, the doctor clamping shaft 734 is provided with a corresponding oblique slot 7342, the doctor shaft 712 is connected with the doctor clamping shaft 734 through the clamping pin 7121, meanwhile, a guide rail support 762 is provided on the outer side of the second inner wall plate 84, a guide rail support 763 is provided on the guide rail support 762, one end of the guide rail 761 is provided with a guide rail 762, when the doctor 761 is installed, the guide rail 761 is pulled out, then the guide rail 761 is pulled out, and then the two ends of the doctor 71 are pushed into the corresponding doctor shaft 71 through the clamping hook 71, and then the two ends of the doctor shaft 71 are pushed into the hand wheel 71.

Working principle:

when the screen cylinder 61 with the corresponding pattern is installed according to the printing requirement, the movable clamp ring 625 in the first support part 62 and the second support part 63 is opened first to enable the opening range of the movable clamp ring 625 to exceed a semicircle, then the screen cylinder 61 is placed, after the screen cylinder 61 is placed in place, the lower end of the screen cylinder 61 is positioned through the fixed clamp claw 6241 on the fixed plate 624, then the movable clamp ring 625 is rotated to enable the movable clamp claw 6251 on the movable clamp ring 625 to position the upper end of the screen cylinder 61, and therefore the installation procedure of the screen cylinder 61 is very conveniently completed. During printing, paper is transferred to the impression cylinder 5 through the paper conveying part 1, before the paper is delivered, the plate opening roller bearing 561 rotates along the plate opening cam 55 along with the rotation of the impression cylinder 5, so that the movable guard plate 512 is opened in advance and hidden below the fixed guard plate 511, then the tooth opening roller bearing 541 rotates along the tooth opening cam 53, so that the grippers are opened, the grippers 513 are closed at the delivery position and hold the paper conveyed by the paper conveying part 1, then the movable guard plate 512 is closed, at this time, the notch 52 of the impression cylinder 5 forms smooth transition, thereby realizing the preparation of printing, simultaneously, the doctor 71 is adjusted according to the printing requirement, the doctor support swing arm 721 is driven to turn up and down through the action of the lifting cylinder 722, the doctor 71 is separated from and combined with the pressing of the doctor 71 to press the screen cylinder 61 or away from the screen cylinder 61, the hand wheel 731 is adjusted through the rotation angle according to different printing requirements, fine adjustment of the angle of the doctor blade 71 is performed by rotating the height adjusting hand wheel 741, fine adjustment of the height of the doctor blade 71 is performed by rotating the translational adjusting hand wheel 751, fine adjustment of the position of the doctor blade 71 in the screen cylinder 61 is performed, adjustment of the doctor blade 71 is completed, the doctor blade 71 is moved down to press the screen cylinder 61 against the impression cylinder 5 during printing, the screen cylinder 61 is rotated and the impression cylinder 5 is rotated, ink between the doctor blade 71 and the screen cylinder 61 is pressed from the small holes of the corresponding pattern on the screen cylinder 61 onto the sheet gripped by the impression cylinder 5, thereby realizing high-speed printing of the sheet, during printing, the axial direction of screen printing graphics can be adjusted by the first servo motor 641, the axial direction of screen printing can be adjusted by the second servo motor 651, and the screen printing plate 611 can be tensioned by the action of the tensioning cylinder 632, various adjustments to the screen cylinder 61 are realized, ensuring the print quality. After printing is completed, the screen cylinder 61 is rotated by the transmission shaft 662 through the cooperation of the third motor 661 and the friction clutch 665, so that the non-image-text part on the screen cylinder 61 is downward, ink is prevented from leaking out through the small holes of the image-text part, and printing quality is ensured.

The high-speed round screen printer has reasonable structure and rich functions, realizes high-speed printing of paper and is beneficial to large-scale popularization.

Claims (6)

1. A high-speed circular screen printer, characterized by: the paper feeding device comprises a paper feeding part, a printing part, a drying part and a paper collecting part which are sequentially arranged, wherein the paper feeding part is used for conveying paper to be printed, the printing part is used for printing the paper, the drying part is used for drying the printed paper, and the paper collecting part is used for collecting the dried paper; the printing part comprises a frame, an impression cylinder and a printing mechanism, wherein the impression cylinder and the printing mechanism are arranged on the frame, the impression cylinder is arranged below the printing mechanism, the impression cylinder is used for receiving paper transmitted by the paper conveying part and driving the paper to rotate, the printing mechanism comprises a screen cylinder mechanism and a scraper mechanism, the scraper mechanism is arranged in the screen cylinder mechanism, the screen cylinder mechanism comprises a supporting part and a screen cylinder, the screen cylinder is supported in the supporting part, the supporting part is arranged on the frame, ink is arranged in the screen cylinder, and the rotation of the screen cylinder is used for transferring the ink to the paper on the impression cylinder through small holes on the screen cylinder; the machine frame comprises a first external wall plate and a second external wall plate, wherein the first external wall plate and the second external wall plate are arranged at intervals, and the impression cylinder is rotatably arranged between the first external wall plate and the second external wall plate; the inner side of the first external wall panel is provided with a first internal wall panel, the inner side of the second external wall panel is provided with a second internal wall panel, and the supporting parts are arranged on the first internal wall panel and the second internal wall panel; the silk screen cylinder comprises a silk screen printing plate and end rings, wherein the end rings are arranged at two ends of the silk screen printing plate and are detachably connected with the supporting parts, a circumferential alignment mechanism, an axial alignment mechanism and an ink leakage prevention mechanism are arranged on the rack, the circumferential alignment mechanism comprises a first servo motor, a bevel gear and a bevel gear axial movement mechanism, and the first servo motor is in transmission connection with the bevel gear axial movement mechanism and is used for driving the bevel gear to move axially; the axial alignment mechanism comprises a second servo motor and a screen cylinder axial moving mechanism, the screen cylinder axial moving mechanism is connected with the supporting part, the second servo motor is in transmission connection with the screen cylinder axial moving mechanism and is used for driving the screen cylinder supporting mechanism to move axially, the ink leakage prevention mechanism comprises a third motor, a transmission shaft and a clutch mechanism, the transmission shaft is rotatably arranged between the frames, a first driving gear is arranged on the transmission shaft and is in transmission connection with the supporting part, and the clutch mechanism is used for cutting off or connecting the power transmission of the first driving gear and the supporting part; the helical gear axial moving mechanism comprises a first supporting seat, the first supporting seat is arranged on the outer side of the first external wall panel, the first servo motor is arranged on the first supporting seat, a first transmission gear is connected with an output shaft of the first servo motor in a transmission manner, a first ball screw is arranged in the first supporting seat, the first transmission gear is coaxially arranged with one end of the first ball screw, a helical gear is connected with the other end of the first ball screw, an impression cylinder driving gear is connected with the helical gear in a transmission manner, and the rotation of the first transmission gear is used for driving the helical gear to axially move; the screen cylinder axial moving mechanism comprises a second supporting seat, the second supporting seat is arranged on the outer side of the first external wall plate, a second servo motor is arranged on the second supporting seat, an output shaft of the second servo motor is in transmission connection with a second transmission gear, a second ball screw is arranged in the second supporting seat, the second transmission gear is coaxially arranged with one end of the second ball screw, a sliding seat is slidably arranged on the first external wall plate, one end of the sliding seat is connected with the supporting portion, the other end of the sliding seat is connected with the second ball screw, and rotation of the second transmission gear is used for driving the sliding seat to axially move; the clutch mechanism comprises a tooth clutch and a friction clutch, the tooth clutch is arranged at one end of the transmission shaft, the friction clutch is arranged at the other end of the transmission shaft, and the friction clutch is in transmission connection with the third motor; the support portion is equipped with two, marks as first support portion and second support portion, first support portion establishes on the first interior wallboard, the second support portion is established on the second interior wallboard, first support portion includes supporting sleeve and ring gear, the ring gear rotates through the bearing and sets up on the supporting sleeve, and with first drive gear transmission is connected, the peripheral cover of ring gear is equipped with first outer support ring, first outer support ring with the sliding seat is connected, the ring gear lower extreme is equipped with the fixed plate, be provided with fixed jack catch on the fixed plate, fixed jack catch is equipped with two, is located respectively the fixed plate both ends, the ring gear still rotates and is provided with movable snap ring, be equipped with movable jack catch on the movable snap ring, be equipped with corresponding draw-in groove on the end ring, the end ring passes through movable jack catch with fixed jack catch with the ring gear is connected, be equipped with the plunger in the locating hole, movable jack catch passes through the plunger head with the joint is connected.

2. The high-speed rotary screen printer of claim 1, wherein: be equipped with on the impression cylinder and bite paper mechanism, the impression cylinder passes through bite paper mechanism carries out the transport of paper, be equipped with the breach along axial direction on the impression cylinder, it establishes to bite paper mechanism in the breach, it includes fixed backplate, activity backplate and gripper to bite paper mechanism, fixed backplate is fixed breach one side, the activity backplate rotates to set up the breach opposite side, fixed backplate with the activity backplate all have with impression cylinder surface unanimous profile curved surface, the gripper is established activity backplate below, the gripper is used for pressing from both sides tight paper, the activity backplate is used for rotating in order to dodge the gripper.

3. The high-speed rotary screen printer according to claim 2, wherein: the gripper is arranged on a gripper shaft, the gripper shaft is arranged in the notch along the axial direction of the impression cylinder, one end of the impression cylinder is provided with a gripper cam, the end part of the gripper shaft is connected with a gripper driving mechanism, and the gripper driving mechanism rotates along the surface of the gripper cam to drive the gripper to open or close; the gripper driving mechanism comprises a gripper roller bearing and a gripper swing arm, one end of the gripper swing arm is connected with the gripper shaft, the gripper roller bearing is arranged at the other end of the gripper swing arm, and the gripper roller bearing is in butt joint with the gripper cam; the movable guard board is arranged on a guard board shaft, the guard board shaft is arranged in the gap along the axial direction of the impression cylinder, the other end of the impression cylinder is provided with a plate opening cam, the end part of the guard board shaft is connected with a guard board driving mechanism, and the guard board driving mechanism rotates along the surface of the plate opening cam to drive the movable guard board to open or close; the guard plate driving mechanism comprises an opening plate roller bearing and an opening plate swing arm, one end of the opening plate swing arm is connected with the guard plate shaft, the opening plate roller bearing is installed at the other end of the opening plate swing arm, and the opening plate roller bearing is in butt joint with the opening plate cam.

4. The high-speed rotary screen printer of claim 1, wherein: the scraper mechanism comprises a scraper, a whole scraper lifting mechanism, a scraper angle fine tuning mechanism, a scraper height fine tuning mechanism and a scraper translation mechanism, wherein the whole scraper lifting mechanism, the scraper angle fine tuning mechanism, the scraper height fine tuning mechanism and the scraper translation mechanism are all arranged on the first inner wallboard and the second inner wallboard, the whole scraper lifting mechanism is used for controlling the scraper to move up and down, the scraper angle fine tuning mechanism is used for adjusting the angle of the scraper, the scraper height fine tuning mechanism is used for adjusting the upper position and the lower position of the scraper, and the scraper translation mechanism is used for adjusting the position of the scraper in the radial direction of the silk screen roller.

5. The high-speed rotary screen printer of claim 4, wherein: the scraper is arranged in a scraper supporting swing arm, the middle position of the scraper supporting swing arm is hinged to the first inner wallboard and the second inner wallboard, and the scraper supporting swing arm is connected with the scraper integral lifting mechanism; the scraper integral lifting mechanism comprises a lifting cylinder, a cam and a cam connecting rod, wherein the lifting cylinder is connected to the first inner wallboard and the second inner wallboard and is connected with the cam connecting rod, the cam connecting rod is connected with the cam, the cam is abutted to the scraper supporting swing arm, and the lifting cylinder is used for driving the scraper supporting swing arm to swing up and down so as to lift the scraper; the scraper angle fine adjustment mechanism comprises an angle adjustment hand wheel and an angle adjustment connecting rod, a first mounting seat is arranged on the first inner wall plate and the second inner wall plate, the angle adjustment hand wheel is in threaded connection with the first mounting seat, one end of the angle adjustment connecting rod is hinged with the end part of the angle adjustment hand wheel, a scraper clamping shaft is arranged in the scraper support swing arm, the end part of the scraper is clamped with the scraper clamping shaft, a hinging seat is arranged on the scraper clamping shaft, the other end of the angle adjustment connecting rod is hinged with the hinging seat, and the rotation of the angle adjustment hand wheel is used for driving the scraper clamping shaft to rotate; the scraper height fine adjustment mechanism comprises a height adjustment hand wheel and a height adjustment connecting rod, a second installation seat is arranged on the first inner wallboard and the second inner wallboard, the height adjustment hand wheel is in threaded connection with the second installation seat, one end of the height adjustment connecting rod is hinged with the end part of the height adjustment hand wheel, a scraper shaft fixing block is arranged on the scraper clamping shaft, the upper side surface of the scraper shaft fixing block is a slope, the other end of the height adjustment connecting rod is connected with a wedge block, the wedge block is in butt joint with the upper side surface of the scraper fixing block, and the rotation of the height adjustment hand wheel is used for driving the scraper clamping shaft to move up and down; the scraper translation mechanism comprises a translation adjusting hand wheel and a translation adjusting connecting rod, a third installation seat is arranged on the first inner wallboard and the second inner wallboard, the translation adjusting hand wheel is in threaded connection with the third installation seat, one end of the translation adjusting connecting rod is hinged with the end part of the translation adjusting hand wheel, the other end of the translation adjusting connecting rod is connected with the scraper shaft fixing block, and the rotation of the translation adjusting hand wheel is used for driving the scraper clamping shaft to translate; the scraper shaft is connected with a scraper placing mechanism, the scraper placing mechanism comprises a guide rail, a clamping hook is arranged on the guide rail, the scraper comprises a scraper body and a scraper shaft, the scraper body is arranged below the scraper shaft, the scraper shaft is connected with the clamping hook in a clamping manner, one end of the scraper shaft is provided with a clamping pin, a corresponding oblique groove is formed in the scraper clamping shaft, the scraper shaft is connected with the scraper clamping shaft through the clamping pin, a guide rail supporting seat is arranged on the outer side of the first inner wall plate, a guide rail supporting seat is arranged on the guide rail supporting seat, the guide rail is clamped on the guide rail supporting seat through the guide rail supporting seat, and a handle for pulling out the guide rail is arranged at one end of the guide rail.

6. The high-speed rotary screen printer of claim 1, wherein: the second supporting part comprises a second outer supporting ring, a tensioning cylinder is arranged between the second outer supporting ring and the frame, one end of the tensioning cylinder is connected with the second inner wall plate, the other end of the tensioning cylinder is connected with the second outer supporting ring, a plurality of tensioning cylinders are arranged, and the tensioning cylinders are circumferentially arranged on the second outer supporting ring.

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