CN213947781U

CN213947781U - Screen printing machine

Info

Publication number: CN213947781U
Application number: CN202022318760.0U
Authority: CN
Inventors: 张增盛
Original assignee: Shanghai Esheng Mechanical And Electrical Engineering Co ltd
Current assignee: Shanghai Esheng Mechanical And Electrical Engineering Co ltd
Priority date: 2020-10-17
Filing date: 2020-10-17
Publication date: 2021-08-13
Anticipated expiration: 2030-10-17

Abstract

The application relates to a silk screen printing machine, it includes the frame, rotates to be connected in the printing frame of frame, drive printing frame pivoted actuating mechanism and scrape the printing mechanism of moving printing ink, printing mechanism is including connecting in the installation piece of printing frame upper end, along a plurality of scraper blades of installation piece removal and drive scraper blade and be on a parallel with the printing plate reciprocating motion's that the printing frame is connected first driving piece, the axis of rotation of the moving direction perpendicular to printing frame of scraper blade. This application is when needs printing frame upwards rotation, utilizes first driving piece to drive the scraper blade and removes to the axis of rotation department that is close to the printing frame, has reduced the drive turning block and has rotated required application of force this moment to make the rotation process of turning block more laborsaving, reduced the power that drive printing frame rotated required driving source, reduced the consumption of the energy.

Description

Screen printing machine

Technical Field

The application relates to the technical field of printing equipment, in particular to a screen printing machine.

Background

Screen printing machines are common printing machines for printing text and images, applying ink to a printing plate during printing, and then transferring the ink directly or indirectly to paper or other substrates to reproduce the same print as the printing plate.

At present, a screen printer usually uses a printing frame to define a printing plate, and then the printing frame is turned up and down to attach the printing plate to a printing stock to complete printing.

In view of the above-mentioned related technologies, the inventor believes that, because the printing frame has a certain weight, a larger power source is needed to drive the printing frame to rotate in the process of driving the printing frame to rotate back and forth, and thus more energy is consumed.

Therefore, a new technical solution is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to reduce the power of the required power supply of drive print carriage rotation, reduce the consumption of the energy, this application provides a silk screen printing machine.

The application provides a silk screen printing machine adopts following technical scheme:

the utility model provides a silk screen printing machine, includes the frame, rotates to be connected in the printing frame of frame, drive printing frame pivoted actuating mechanism and scrape the printing mechanism of moving printing ink, printing mechanism is including connecting in the installation piece of printing frame upper end, along a plurality of scraper blades of installation piece removal and drive scraper blade and be on a parallel with the printing plate reciprocating motion's that the printing frame is connected first driving piece, the axis of rotation of the direction of movement perpendicular to printing frame of scraper blade.

Through adopting above-mentioned technical scheme, when needs printing frame upwards rotate, utilize first driving piece to drive the scraper blade and remove to the axis of rotation department that is close to the printing frame, reduced the required power of exerting of drive turning block rotation this moment to make the rotation process of turning block more laborsaving, reduced the power of drive printing frame rotation required driving source, reduced the consumption of the energy.

Optionally: the frame is connected with the adjustment mechanism of adjusting the vertical height of printing frame, adjustment mechanism is including being fixed in a plurality of regulating blocks of support body upper end, along the vertical gliding connecting block of regulating block and the lead screw that the drive connecting block removed, the lead screw rotates with the regulating block to be connected, the lead screw passes connecting block and both threaded connection, the printing frame rotates with the connecting block to be connected.

Through adopting above-mentioned technical scheme, adjust the vertical height of printing frame to make the printing frame print the stock of different thickness, improved the application scope of silk screen printing machine.

Optionally: the printing frame comprises a rotating block arranged between adjacent connecting blocks, a fixing block fixed on the rotating block and a plurality of clamping plates used for fixing the printing plate, the clamping plates are connected to one end, far away from the rotating block, of the fixing block, rotating shafts are fixed at two ends of the rotating block, and the rotating shafts are rotatably connected with the connecting blocks.

Through adopting above-mentioned technical scheme, the printing plate is fixed through the cardboard, arranges the turning block in between the connecting block simultaneously, makes subsequent actuating mechanism's installation more convenient.

Optionally: the fixed block is connected with a plurality of positioning mechanism that adjust the interval between scraper blade and the fixed block respectively, positioning mechanism is including connecting in the locating piece of fixed block, sliding connection in the sliding block of locating piece and the positioning bolt that the drive sliding block removed, positioning bolt and locating piece threaded connection, positioning bolt rotates to be connected in the sliding block and drives the sliding block and remove, the cardboard is connected in the sliding block and is close to adjacent positioning mechanism's lateral wall.

By adopting the technical scheme, the area of the printing plate is adjusted according to the area of the printing stock, so that the clamping plate is connected to the middle position of the printing plate, and the printing plate is more stably fixed.

Optionally: the fixed block is close to the terminal surface of sliding block and offers the adjustment tank that is the level and sets up, the one end of sliding block is arranged in the adjustment tank and is slided, sliding block threaded connection has the fastening bolt of injecing its position, fastening bolt and adjustment tank bottom surface butt.

By adopting the technical scheme, the printing plates with different areas are fixed by adjusting the distance between the two clamping plates, and the application range of the screen printing machine is enlarged.

Optionally: the mounting block is connected with a plurality of groups of moving mechanisms which respectively drive the scraper to vertically move, each moving mechanism comprises a moving block which horizontally moves along the mounting block, a guide rod which vertically moves along the moving block and a moving member which drives the guide rod to vertically move, the output end of each moving member is fixedly connected with a screw rod, one end, far away from the moving member, of the screw rod is in threaded connection with a moving ring, the moving ring is connected with the guide rod, the lower end of the guide rod is connected with the scraper, and the output end of the first driving member is connected with the moving block.

Through adopting above-mentioned technical scheme, the scraper blade rises when changing the printing plate to can not exert an influence to the change of printing plate, utilize the removal to change the position of scraper blade simultaneously and finely tune, make better and the printing plate upper end butt of scraper blade.

Optionally: the terminal surface that the movable block is close to the installation piece is fixed with a plurality of guide rods, the guide arm passes the installation piece and both slide and connect, the bolster has all been cup jointed to the guide rod, the bolster is located one side that the installation piece is close to the movable block, the guide rod all is fixed with the locating part, the bolster is close to the terminal surface butt of installation piece with the locating part, the bolster other end is connected with the installation piece.

By adopting the technical scheme, the buffer piece is utilized to buffer the movement of the moving block towards the mounting block, so that the moving block is not easy to directly contact with the mounting block, and the damage is reduced.

Optionally: the driving mechanism comprises driving cylinders fixed on the connecting blocks respectively, piston rods of the driving cylinders are rotatably connected with the fixing blocks, and the piston rods of the driving cylinders are located between the rotating shafts and the fixing blocks.

By adopting the technical scheme, the air cylinder is utilized to directly push the rotating block to rotate, the energy loss is reduced in the pushing process, the power required by pushing the air cylinder is reduced, and the energy consumption is reduced.

Optionally: the driving mechanism comprises a first driven gear coaxially fixed on the rotating shaft, a rack sliding along the connecting block and a second driving cylinder driving the rack to move, the rack is meshed with the driven gear, and the second driving cylinder is fixed on the connecting block.

Through adopting above-mentioned technical scheme, utilize the cylinder to promote the rack and remove to drive the turning block and rotate.

Optionally: the driving mechanism comprises a second driven gear coaxially fixed on the rotating shaft, a driving gear rotatably connected to the connecting block and a driving motor driving the driving gear to rotate, an output shaft of the driving motor is coaxially fixed with the driving gear, and the driving gear is meshed with the second driven gear.

Through adopting above-mentioned technical scheme, utilize driving motor directly to drive the turning block and rotate, make the rotation process of turning block more convenient, reduced the required actuating mechanism's of drive turning block rotation volume simultaneously, reduced the volume of silk screen printing machine, practiced thrift the space.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the printing frame is driven to rotate upwards, the counterweight of the scraper is close to the rotating axis of the printing frame, and the thrust required for driving the printing frame to rotate is smaller, so that the load required by a power source for pushing the printing frame is reduced, and the energy consumption is reduced;

2. utilize positioning mechanism to adjust the interval between cardboard and the fixed block, the cardboard all connects in the middle part of printing plate for child when the position to the printing plate of different areas is being restricted this moment to make the connection of printing plate more stable.

Drawings

FIG. 1 is a schematic structural diagram of example 1 of the present application;

fig. 2 is a schematic view for showing the structure of an adjusting mechanism in embodiment 1 of the present application;

FIG. 3 is an enlarged view of part A of FIG. 2 in accordance with embodiment 2 of the present application;

fig. 4 is a schematic view for showing a structure of a positioning mechanism in embodiment 1 of the present application;

FIG. 5 is an enlarged view of part B of FIG. 1 in accordance with embodiment 1 of the present application;

FIG. 6 is a schematic view for showing the structure of a drive mechanism in embodiment 2 of the present application;

fig. 7 is a schematic diagram for showing a structure of a driving mechanism according to embodiment 3 of the present application.

In the figure, 1, a frame; 2. a printing frame; 21. rotating the block; 22. a fixed block; 221. an adjustment groove; 23. clamping a plate; 231. a vertical portion; 232. a horizontal portion; 24. a rotating shaft; 25. a contact block; 26. a slider; 261. fastening a bolt; 27. installing a bolt; 271. connecting sheets; 272. mounting a nut; 28. a lifting cylinder; 3. a drive mechanism; 31. a first driving cylinder; 32. a first driven gear; 33. a rack; 34. a second driving cylinder; 35. a guide block; 351. a guide portion; 36. a second driven gear; 37. a motor; 38. a driving gear; 4. a printing mechanism; 41. mounting blocks; 411. a connecting rod; 412. a guide hole; 42. a squeegee; 43. a first driving member; 44. a guide sleeve; 45. a guide rod; 46. a buffer member; 47. a limiting member; 5. an adjustment mechanism; 51. an adjusting block; 511. a sliding groove; 52. connecting blocks; 521. a sliding block; 522. a bearing block; 53. a lead screw; 531. a rotating ring; 532. a first annular groove; 533. a first positioning pin; 54. an abutment bolt; 55. a butting block; 6. a positioning mechanism; 61. positioning blocks; 611. positioning a groove; 62. a slider; 63. positioning the bolt; 631. a second annular groove; 632. a second positioning pin; 64. an extension block; 7. a moving mechanism; 71. a moving block; 72. a guide bar; 721. a fastening block; 722. rotating the rod; 723. rotating the block; 7231. a through hole; 7232. a rotating tank; 73. a moving member; 731. a screw; 732. a moving ring; 74. a connecting plate; 75. and (7) mounting frames.

Detailed Description

The present application is described in further detail below with reference to the attached drawings.

The application discloses a silk screen printing machine reduces the required power of the equipment that the removal in-process drive printing frame 2 of printing frame 2 removed to reduce the energy that consumes.

Example 1: as shown in fig. 1, the printing device comprises a frame 1, a printing frame 2 rotationally connected to the frame 1, a driving mechanism 3 for driving the printing frame 2 to rotate, and a printing mechanism 4 for scraping an oil film, wherein a bearing table for bearing a printing stock is arranged at the upper end of the frame 1, the bearing table can be a disc type rotatably connected or a fixed type, and the printing stock is placed on the bearing table.

As shown in fig. 1, 2 and 3, the frame body is connected with an adjusting mechanism 5 for adjusting the height of the printing frame 2, and the adjusting mechanism 5 includes two adjusting blocks 51 fixed on the upper end of the frame 1 by bolts, two connecting blocks 52 vertically sliding along the adjusting blocks 51, and two lead screws 53 respectively driving the connecting blocks 52 to move. The side walls of the two adjusting blocks 51 close to the printing frame 2 are provided with a sliding groove 511 which is vertically arranged, the end surfaces of the connecting blocks 52 close to the adjusting blocks 51 are provided with sliding blocks 521 which are integrally formed, and the sliding blocks 521 are arranged in the sliding groove 511 to vertically slide. The lead screw 53 is vertical setting and rotates and connect in both ends about the groove 511 that slides, and the upper end of lead screw 53 passes the up end of regulating block 51 and uses the coaxial swivel 531 that is fixed with of round pin, and lead screw 53 passes the piece 521 that slides and both threaded connection, thereby adjusts the vertical position of connecting block 52 through rotating lead screw 53. First ring channel 532 has been seted up to lead screw 53 lateral wall upper end coaxial, and adjusting block 51 does not set up chute 511 and is vertical lateral wall threaded connection have first locating pin 533, and three lateral wall butt of first locating pin 533 lateral wall and first ring channel 532 to the relative position of injecing lead screw 53 and sliding block 521. An abutting bolt 54 is in threaded connection with the end face, away from the connecting block 52, of the sliding block 521, an abutting block 55 is adjusted by the abutting bolt 54, one end of the abutting block 55 abuts against the side wall, away from the connecting block 52, of the adjusting block 51, and the other end of the abutting block 55 abuts against the head of the abutting bolt 54.

As shown in fig. 1 and 2, the printing frame 2 includes a rotary block 21 disposed between adjacent connecting blocks 52, a fixing block 22 fixed to the rotary block 21 using bolts, and two clamping plates 23 for fixing printing plates. The rotating shaft 24 is fixedly connected to the end face of the rotating block 21 close to the connecting block 52, the other end of the rotating shaft 24 far away from the rotating block 21 is respectively inserted into the connecting block 52, and the rotating shaft 24 is rotatably connected with the connecting block 52. The lower extreme of fixed block 22 uses the bolt can dismantle to be connected with contact block 25, and connecting block 52 lower extreme integrated into one piece has carrier block 522, and carrier block 522 and the contact block 25 butt of being the fixed block 22 lower extreme connection of level setting. Fixed block 22 sets up in the turning block 21 one side that is close to the plummer, its terminal surface that is close to the plummer is seted up and is the adjustment tank 221 of level setting, the longitudinal section of adjustment tank 221 is the T type, the sliding connection has two sliders 26 of adjusting adjacent cardboard 23 position in the adjustment tank 221, the equal threaded connection of one end that fixed block 22 was kept away from to slider 26 has fastening bolt 261, fastening bolt 261 passes slider 26 and with the butt of adjustment tank 221 bottom surface to inject the position of slider 26 in adjustment tank 221.

As shown in fig. 4, the two sliders 26 are connected to a positioning mechanism 6 for adjusting the relative position between the scraper 42 and the fixed block 22, and the positioning mechanism 6 includes a positioning block 61 fixed to a side wall of the slider 26 by a bolt, a sliding block 62 connected to the positioning block 61 in a sliding manner, and a positioning bolt 63 for driving the sliding block 62 to move. The positioning blocks 61 are disposed on one side of the sliding block 26 away from the fixing block 22, the side walls of the two positioning blocks 61 close to each other are both provided with a positioning groove 611 horizontally disposed, and the sliding block 62 is partially disposed in the positioning groove 611 to slide. The end of the sliding block 62 away from the fixed block 22 is connected with an extending block 64 by using a bolt, a positioning bolt 63 passes through the extending block 64 and is in threaded connection with the positioning block 61, and the axis of the positioning bolt 63 is parallel to the length direction of the positioning block 61. The position that the lateral wall of positioning bolt 63 is close to its head has seted up second annular groove 631 coaxially, and extension piece 64 upper end threaded connection has second locating pin 632, and second locating pin 632 and the three lateral wall butt of second annular groove 631 to make positioning bolt 63 and extension piece 64's relative position difficult change.

As shown in fig. 4, the clamping plate 23 includes a vertical portion 231 and a horizontal portion 232 integrally formed with upper and lower end surfaces thereof, the vertical portion 231 is fixed on the side wall of the sliding block 62 away from the positioning block 61 by bolts, two mounting nuts 272 are welded to the upper end of the horizontal portion 232 located above, two mounting bolts 27 are both connected with the mounting bolts 27 in a threaded manner, the mounting bolts 27 pass through the horizontal portion 232 located above, a connecting piece 271 is connected with a screw 731 of the mounting bolts 27 in a threaded manner, and the connecting piece 271 is abutted to the printing plate, so as to reduce the pressure applied to the printing plate and reduce the probability of.

As shown in fig. 2, the driving mechanism 3 includes two first driving cylinders 31, the cylinders of the two first driving cylinders 31 are respectively fixed below a connecting block 52 by bolts, the piston rod of the first driving cylinder 31 passes through the connecting block 52 and is rotatably connected to the fixed block 22, and the first driving cylinder 31 is located between the rotating shaft 24 and the fixed block 22. At this time, the space occupied by the first driving cylinder 31 is reduced, and the overall volume of the screen printer is reduced.

As shown in fig. 5, the printing mechanism 4 includes a mounting block 41 slidably attached to an upper end of the rotary block 21, a squeegee 42 horizontally moving along the mounting block 41, and a first driving member 43 driving the squeegee 42 to reciprocate parallel to a printing plate attached to the printing frame 2, and the first driving member 43 is a printing cylinder. The lower end of the mounting block 41 is connected with two vertically arranged connecting rods 411 by using bolts, the connecting rods 411 penetrate through the rotating block 21 and vertically move along the rotating block 21, and the axes of the connecting rods 411 are perpendicular to and intersected with the axis of the rotating shaft 24. The upper end of the rotating block 21 is further connected with a lifting cylinder 28 through a bolt, a piston rod of the lifting cylinder 28 is fixed at the lower end of the mounting block 41 through a bolt, and the lifting cylinder 28 is used for driving the scraper 42 to be close to or far away from the printing plate.

As shown in fig. 5, the mounting block 41 is connected with two sets of moving mechanisms 7 for respectively driving the scrapers 42 to vertically move, each moving mechanism 7 includes a moving block 71 moving horizontally, four guide rods 72 moving vertically along the moving block 71, and two moving members 73 for driving the guide rods 72 to vertically move, and each of the two moving members 73 is a vertically arranged moving cylinder. Four guide bars 72 all are vertical setting and all pass movable block 71 and remove, and two guide bar 72 upper ends use bolted connection to have connecting plate 74 jointly, and the cylinder body of moving cylinder uses the bolt fastening in movable block 71 upper end, and the piston rod welding of moving cylinder has screw rod 731 that is vertical setting, and screw rod 731 passes two different removals respectively and threaded connection has shift ring 732, thereby shift ring 732 lower extreme and connecting plate 74 upper end butt adjust the vertical height of guide bar 72. The common threaded connection of two guide bars 72 lower extreme that same connecting plate 74 connects has fastening block 721, fastening block 721 both ends homogeneous body shaping has dwang 722, dwang 722 all cup joints rotatory piece 723, the terminal surface that rotatory piece 723 is close to fastening block 721 runs through has through-hole 7231, the lateral wall of through-hole 7231 runs through has rotatory groove 7232, rotatory groove 7232 is close to and is kept away from the terminal surface of fastening block 721 with rotatory piece 723, dwang 722 is inserted and is arranged in through-hole 7231 internal rotation. The rotary block 723 is coupled to the mounting block 75 using bolts that simultaneously pass through both sidewalls of the rotary groove 7232 to restrict the relative rotation of the rotating rod 722 and the rotary block 21, and the squeegee 42 is screwed to the mounting block 75 using bolts, and the lower end of the squeegee 42 abuts on the upper end of the printing plate.

As shown in fig. 2, two guide holes 412 penetrate through the end surface of the mounting block 41 close to the moving block 71, guide sleeves 44 are connected to the guide holes 412 through bolts, two horizontally arranged guide rods 45 are connected to the end surface of the moving block 71 close to the mounting block 41 through bolts, and the guide rods 45 respectively penetrate through the guide sleeves 44 and horizontally slide along the guide sleeves 44. The two guide rods 45 are sleeved with a buffer 46, the buffer 46 is a spring in this embodiment, the two guide rods 45 are connected with two limit parts 47 by using bolts, and the limit parts are respectively located at two sides of the mounting block 41. One end of the spring abuts against the stopper 47 near the moving block 71, and the other end of the spring abuts against the end surface of the guide sleeve 44 near the moving block 71. The cylinder body of the printing cylinder is fixed at the lower end of the mounting block 41 through bolts, the piston rod of the printing cylinder is fixed with the moving block 71 through bolts, at the moment, after printing of a printing stock is completed, the moving block 71 moves to be close to the lifting cylinder 28, the force applied by the moving block 71 on the rotating block 21 is closer to the rotating shaft 24, and therefore the rotating block 21 is enabled to rotate upwards more labor-saving.

The implementation principle of the embodiment is as follows: the printing stock is placed on the bearing table, the printing plate is placed between the two clamping plates 23, ink is placed on the printing plate, the position of the printing plate is adjusted by the rotary screw 53 to be abutted to the printing stock, the abutting bolt 54 is locked, the lifting cylinder 28 is driven to move downwards to enable the scraper 42 to be close to the printing plate, the position of the scraper 42 is adjusted by the rotary moving ring 732 to enable the scraper 42 to be abutted to the upper end of the printing plate, the printing cylinder pushes the scraper 42 to move to print patterns on the printing stock, the moving member 73 pushes the scraper 42 to move upwards after the pattern is printed, the printing cylinder drives the scraper 42 to move to be close to the lifting cylinder 28, the driving cylinder pushes the rotary block 21 to rotate upwards at the moment, and the printing stock is taken out to be printed next time.

Example 2: as shown in fig. 6, the difference from embodiment 1 is that the connecting block 52 is provided with an opening near the end face of the rotating block 21, the driving mechanism 3 includes a first driven gear 32 coaxially fixed to the rotating shaft 24, a rack 33 vertically moving along the connecting block 52, and a second driving cylinder 34 driving the rack 33 to vertically move, a guide block 35 is connected to an inner cavity of the connecting block 52 by using a bolt, a guide portion 351 is integrally formed at the end face of the guide block 35 near the rack 33, the guide portion 351 is inserted into the rack 33, the rack 33 vertically moves along the guide portion 351, and the rack 33 is engaged with the first driven gear 32. The cylinder body of the second driving cylinder 34 is fixed to the upper end of the connecting block 52 by using a bolt, and the piston rod of the second driving cylinder 34 passes through the connecting block 52 and is fixed to the upper end of the rack 33 by using a bolt.

The implementation principle of the embodiment is as follows: when the rotating block 21 is required to rotate, the second driving cylinder 34 drives the rack 33 to move downwards, so as to drive the first driven gear 32 to rotate, and upward rotation of the rotating block 21 is realized.

Example 3: as shown in fig. 7, the difference from embodiment 1 is that the connecting block 52 is provided with an opening near the end face of the rotating block 21, the driving mechanism 3 includes a second driven gear 36 coaxially fixed to the rotating shaft 24 by using a flat key, a driving gear 38 rotatably connected to the inner cavity of the connecting block 52 and a motor 37 driving the driving gear 38 to rotate, the motor 37 is a servo motor 37, the motor 37 is fixed to the end face of the connecting block 52 far from the rotating block 21 by using a bolt, an output shaft of the motor 37 passes through the connecting block 52 and is coaxially fixed to the driving gear 38 by using a flat key, and the driving gear 38 is engaged with the driven gear.

The implementation principle of the embodiment is as follows: when the rotation of the rotating block 21 is required, the motor 37 drives the second driven gear 36 to rotate, so that the upward rotation of the rotating block 21 is realized.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a silk screen printing machine which characterized in that: including frame (1), rotate and connect in printing frame (2), drive printing frame (2) pivoted actuating mechanism (3) of frame (1) and scrape printing mechanism (4) of ink, printing mechanism (4) are including connecting in installation piece (41) of printing frame (2) upper end, along a plurality of scraper blades (42) of installation piece (41) removal and drive scraper blade (42) be on a parallel with printing plate reciprocating motion's that printing frame (2) are connected first driving piece (43), the axis of rotation of the moving direction perpendicular to printing frame (2) of scraper blade (42).

2. The screen printing machine of claim 1, wherein: frame (1) is connected with adjustment mechanism (5) of adjusting printing frame (2) vertical height, adjustment mechanism (5) are including being fixed in a plurality of regulating blocks (51) of support body upper end, along vertical gliding connecting block (52) of regulating block (51) and lead screw (53) that drive connecting block (52) removed, lead screw (53) rotate with regulating block (51) and are connected, lead screw (53) pass connecting block (52) and both threaded connection, printing frame (2) rotate with connecting block (52) and are connected.

3. A screen printing machine according to claim 2, characterized in that: the printing frame (2) comprises rotating blocks (21) arranged between adjacent connecting blocks (52), fixing blocks (22) fixed on the rotating blocks (21) and a plurality of clamping plates (23) used for fixing printing plates, the clamping plates (23) are connected to one ends, far away from the rotating blocks (21), of the fixing blocks (22), rotating shafts (24) are fixed to two ends of each rotating block (21), and the rotating shafts (24) are rotatably connected with the connecting blocks (52).

4. A screen printing machine according to claim 3, characterized in that: fixed block (22) are connected with a plurality of positioning mechanism (6) of adjusting the interval between scraper blade (42) and fixed block (22) respectively, positioning mechanism (6) are including connecting in locating piece (61) of fixed block (22), sliding connection in sliding block (62) of locating piece (61) and positioning bolt (63) that drive sliding block (62) removed, positioning bolt (63) and locating piece (61) threaded connection, positioning bolt (63) rotate to be connected in sliding block (62) and drive sliding block (62) and remove, cardboard (23) are connected in sliding block (62) and are close to the lateral wall of adjacent positioning mechanism (6).

5. A screen printing machine according to claim 4, characterized in that: the terminal surface that fixed block (22) are close to sliding block (62) is seted up adjustment tank (221) that is the level setting, adjustment tank (221) are arranged in to the one end of sliding block (62) and are slided, sliding block (62) threaded connection has fastening bolt (261) of injecing its position, fastening bolt (261) and adjustment tank (221) bottom surface butt.

6. The screen printing machine of claim 1, wherein: the mounting block (41) is connected with a plurality of groups of moving mechanisms (7) which respectively drive the scraper (42) to vertically move, each moving mechanism (7) comprises a moving block (71) which horizontally moves along the mounting block (41), a guide rod (72) which vertically moves along the moving block (71) and a moving member (73) which drives the guide rod (72) to vertically move, the output end of each moving member (73) is fixedly connected with a screw rod (731), one end, far away from the moving member (73), of each screw rod (731) is in threaded connection with a moving ring (732), each moving ring (732) is connected with the guide rod (72), the lower end of each guide rod (72) is connected with the scraper (42), and the output end of each first driving member (43) is connected with the corresponding moving block (71).

7. The screen printing machine of claim 6, wherein: the terminal surface that the movable block (71) is close to installation piece (41) is fixed with a plurality of guide rods (45), guide rod (45) pass installation piece (41) and both slide and connect, bolster (46) have all been cup jointed in guide rod (45), bolster (46) are located one side that installation piece (41) is close to movable block (71), guide rod (45) all are fixed with the locating part, bolster (46) and the locating part are close to the terminal surface butt of installation piece (41), the bolster (46) other end is connected with installation piece (41).

8. A screen printing machine according to any one of claims 1 to 7, characterized in that: the driving mechanism (3) comprises first driving cylinders (31) which are respectively fixed on the connecting blocks (52), piston rods of the driving cylinders (31) are rotatably connected with the fixed blocks (22), and the piston rods of the driving cylinders (31) are located between the rotating shaft (24) and the fixed blocks (22).

9. A screen printing machine according to any one of claims 1 to 7, characterized in that: the driving mechanism (3) comprises a first driven gear (32) coaxially fixed on the rotating shaft (24), a rack (33) sliding along the connecting block (52) and a second driving cylinder (34) driving the rack (33) to move, the rack (33) is meshed with the driven gear, and the second driving cylinder (34) is fixed on the connecting block (52).

10. A screen printing machine according to any one of claims 1 to 7, characterized in that: the driving mechanism (3) comprises a second driven gear (36) coaxially fixed on the rotating shaft (24), a driving gear (38) rotatably connected to the connecting block (52) and a driving motor (37) driving the driving gear (38) to rotate, an output shaft of the driving motor (37) is coaxially fixed with the driving gear (38), and the driving gear (38) is meshed with the second driven gear (36).