CN219789570U - Silk screen printing machine with positioning printing function - Google Patents

Abstract

The utility model relates to a silk screen printing machine with a positioning printing function, which belongs to the technical field of silk screen printing and comprises a base and a printing device arranged on the base, wherein the base comprises a frame, a feeding station, a positioning station and a discharging station are sequentially arranged on the frame, a feeding conveyor belt is arranged on the feeding station, the positioning station and the discharging station share a material guiding conveyor belt, the material guiding conveyor belt is correspondingly arranged on an end extension line of the feeding conveyor belt, and the upper surface of the material guiding conveyor belt and the upper surface of the feeding conveyor belt are in the same plane. According to the utility model, the feeding station, the positioning station and the discharging station are integrated on the same base, so that materials can be directly positioned on the workbench in the feeding process, the printing device is arranged at the top of the workbench in a matching manner, and after the materials are positioned, the printing work can be directly performed, thereby greatly saving the time of the process flow and being beneficial to improving the printing productivity.

Description

Silk screen printing machine with positioning printing function

Technical Field

The utility model relates to the technical field of silk screen printing, in particular to a silk screen printing machine with a positioning printing function.

Background

Silk screen printing belongs to the technology in the printing field, is generally used in the printing of various industrial products, has low cost and is convenient for operation, and the silk screen printing comprises the following procedures in a common printing period: feeding, clamping, printing and discharging, and a common screen printing machine can usually complete the actions of clamping and printing by adopting an automatic means.

In the prior art, the printed matter (glass) is generally conveyed to the lower part of the printing platform to start printing after being positioned externally, and the printing screen plate needs to perform an action process with larger lifting range in the glass conveying process, so that the action process of lifting and descending the screen plate when the glass is fed is increased intangibly, the time of the process is increased, and the printing capacity is reduced.

Therefore, there is a need to produce a screen printing machine, which can directly position the printed matter below the printing platform, and directly print the printed matter after positioning, so as to improve the printing productivity.

Disclosure of Invention

The utility model aims to provide a screen printing machine with a positioning printing function, so as to solve the problems in the background art.

In order to achieve the above purpose, the utility model provides a silk screen printing machine with a positioning printing function, which adopts the following technical scheme:

the screen printer with the positioning printing function comprises a base and a printing device arranged on the base, wherein the base comprises a frame, a feeding station, a positioning station and a discharging station are sequentially arranged on the frame, a feeding conveyor belt is arranged on the feeding station, the positioning station and the discharging station share a material guiding conveyor belt, the material guiding conveyor belt is correspondingly arranged on an end extension line of the feeding conveyor belt, and the upper surface of the material guiding conveyor belt and the upper surface of the feeding conveyor belt are arranged on the same plane;

the printing device is correspondingly arranged above the positioning station, the printing device comprises a lifting assembly and a plurality of printing mechanisms, the lifting assembly is arranged on the frame, the printing mechanisms are respectively arranged on the lifting assembly, the printing mechanisms comprise transverse driving mechanisms, and the transverse driving mechanisms are provided with printing scraping assemblies and printing screen clamping assemblies.

The positioning station comprises a workbench, a lifting mechanism is arranged at the bottom of the workbench, the lifting mechanism is arranged on a rack and used for driving the workbench to lift up and down along the vertical direction, a yielding groove is formed in the position, corresponding to the material guiding conveyor belt, of the workbench, the workbench comprises a frame and a table top, a side positioning assembly is arranged in the middle of the frame, end positioning assemblies are symmetrically arranged on two sides of the side positioning assembly, and guide grooves matched with the side positioning assembly and the end positioning assembly are respectively formed in the surface of the table top;

the discharging station comprises a plurality of extending frames, one ends of the extending frames are fixed on the frame, supporting plates are fixed on the surfaces of the other ends of the extending frames, the supporting plates are symmetrically arranged on two sides of the material guiding conveyor belt, adjusting grooves are formed in the surfaces of the supporting plates, guide stop rods are arranged on the adjusting grooves, and the guide stop rods are fixed on the adjusting grooves through studs.

The side positioning assembly comprises a first sliding rail parallel to the guide conveyor belt, the first sliding rail is fixed on the frame, T-shaped brackets are symmetrically connected to the first sliding rail in a sliding mode, side positioning rods are vertically fixed on two sides of the top end of each T-shaped bracket, a first driving assembly is arranged at the bottom of the first sliding rail, and the first driving assembly is used for driving the T-shaped brackets on two sides to slide.

The end positioning assembly comprises a second sliding rail perpendicular to the first sliding rail, the second sliding rail is fixed on the frame, an L-shaped support is connected to the second sliding rail in a sliding mode, an end positioning rod is vertically fixed to the top end of the L-shaped support, a second driving assembly is arranged at the bottom of the second sliding rail, and the second driving assembly is used for driving the L-shaped supports on two sides to perform relative movement.

Preferably, the lifting mechanism comprises a rotating shaft which is symmetrically arranged, the rotating shaft is rotationally connected to the frame, a first torsion bar is fixed in the middle of the rotating shaft, a second torsion bar is symmetrically fixed at the position, close to the end part, of the rotating shaft, the first torsion bar and the second torsion bar are arranged in a V shape, a transmission rod is hinged between the first torsion bars on two sides, an electric telescopic rod is hinged on one side of the first torsion bar, and a base of the electric telescopic rod is hinged to the frame;

lifting rods are fixed at four corners of the frame of the workbench, guide sleeves are arranged at positions symmetrical to the lifting rods in the frame, the lifting rods are movably arranged in the guide sleeves, connecting rods are hinged to the bottom ends of the lifting rods, and the bottom ends of the connecting rods are hinged to the second torsion bars.

Through adopting above-mentioned technical scheme, adopt comparatively novel succinct structure, only need just can realize the holistic lift of workstation through an electric telescopic handle, the transmission is effectual, low in manufacturing cost.

The lifting assembly comprises profile supports which are symmetrically arranged, the profile supports are perpendicular to the guide conveying belt, guide rods are fixed at two ends of the profile supports, the guide rods can move up and down along the frame, movable blocks parallel to the guide conveying belt are movably arranged inside two sides of the frame, the bottom ends of the guide rods are fixed with the movable blocks, electric pushing rods are vertically fixed at the tops of the movable blocks, and seat parts of the electric pushing rods are fixed on the frame.

The transverse driving mechanism comprises a transverse sliding rail, a first servo motor and a first driven wheel are respectively arranged at two ends of the transverse sliding rail, and a first belt is connected between the output end of the driving motor and the driven wheel.

The printing scraping assembly comprises a printing frame, the printing frame is connected to the transverse sliding rail in a sliding mode, the printing frame is fixed on a first belt, a scraping plate and a pushing plate are arranged at the bottom of the printing frame, first hanging rods are symmetrically fixed at the tops of the scraping plate and the pushing plate respectively, first connecting blocks are fixed between the tops of the first hanging rods, first adjusting plates are arranged at the bottoms of the first connecting blocks, the first adjusting plates are movably sleeved and connected to the first hanging rods, the first hanging rods penetrate through the printing frame, first adjusting cylinders are arranged at the tops of the corresponding scraping plate and the pushing plate on the printing frame respectively, the end portions of piston rods of the first cylinders are fixed with the first adjusting plates, first fine-tuning amplitude rods are connected to the first connecting blocks in a threaded mode, and the bottom ends of the first fine-tuning amplitude rods are connected to the first adjusting plates in a rotating mode.

The printing screen clamping assembly comprises a hanging frame which is symmetrically arranged, the hanging frame is connected onto a transverse sliding rail in a sliding mode, a first locking stud is further connected between the hanging frame and the transverse sliding rail, a suspension module is connected onto the hanging frame in a sliding mode, the suspension module comprises an L-shaped supporting seat, the L-shaped supporting seat is connected onto the hanging frame in a sliding mode, a second fine-tuning amplitude transformer is connected between the L-shaped supporting seat and the hanging frame, a second hanging rod is symmetrically and movably connected onto the L-shaped supporting seat, a second adjusting piece is connected between the tops of the second hanging rods at two sides, a third fine-tuning amplitude transformer is connected onto the second adjusting piece in a threaded mode, the bottom end of the third fine-tuning amplitude transformer is connected with the L-shaped supporting seat in a rotating mode, and connecting seats are symmetrically fixed at the bottoms of the second hanging rods at two sides.

Preferably, the printing screen clamping assembly further comprises a screen clamping module, the screen clamping module comprises a left clamping piece and a right clamping piece, the left clamping piece comprises a left slot, a plurality of compression screws are connected to the left slot in a threaded mode, left L-shaped connecting blocks are symmetrically connected to the left slot, the left L-shaped connecting blocks are connected to a connecting seat in a sliding mode, and a fourth fine adjustment amplitude transformer is connected between the left L-shaped connecting blocks and the connecting seat;

the right side clamping piece includes right side slot, threaded connection has a plurality of compression screws on the right side slot, symmetrical connection has right L shape connecting block on the right side slot, right L shape connecting block slides and connects on the connecting seat, just right L shape connecting block with be equipped with the spring between the connecting seat.

Through adopting above-mentioned technical scheme, the half tone both sides can be fastened in left side slot and right side slot through compression screw, later through rotatory fourth fine setting luffing rod, can promote whole half tone centre gripping module and control fine setting when the fourth fine setting luffing rod rotates to make the half tone can pinpoint the place that needs the printing.

In summary, the present utility model includes at least one of the following beneficial technical effects: according to the silk screen printing machine with the positioning printing function, the feeding station, the positioning station and the discharging station are integrated on the base, so that materials can be directly positioned on the workbench in the feeding process, the printing device is arranged on the top of the workbench in a matching manner, and after the materials are positioned, the printing work can be directly performed, so that the time of a process flow is greatly saved, and the printing productivity is improved;

the fine adjustment amplitude transformer is arranged in the printing frame and the printing screen clamping assembly in the printing device, so that the screen can be accurately adjusted in position, and printed matters with better quality can be produced.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of the overall structure of a base according to an embodiment of the present utility model.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic diagram of an internal structure of a workbench according to an embodiment of the utility model.

Fig. 5 is a schematic diagram of a structure of a workbench according to an embodiment of the utility model at different viewing angles.

Fig. 6 is a schematic structural view of a lifting mechanism according to an embodiment of the present utility model.

Fig. 7 is a schematic structural view of a printing-and-scraping assembly according to an embodiment of the present utility model.

Fig. 8 is a schematic view of a structure for embodying a printing screen clamp assembly according to an embodiment of the present utility model.

Reference numerals illustrate: 1. a frame; 11. a feeding conveyor belt; 12. a material guiding conveyor belt; 13. a guide sleeve; 2. a feeding station; 3. positioning a station; 31. a work table; 311. a relief groove; 312. a frame; 313. a table top; 3131. a guide groove; 314. a lifting rod; 32. a side positioning assembly; 321. a first slide rail; 322. a T-shaped bracket; 323. a side positioning rod; 33. an end positioning assembly; 331. a second slide rail; 332. an L-shaped bracket; 333. an end positioning rod; 4. a discharging station; 41. an extension frame; 42. a support plate; 43. a guide stop lever; 5. a lifting mechanism; 51. a rotating shaft; 52. a first torsion bar; 53. a second torsion bar; 54. a transmission rod; 55. an electric telescopic rod; 56. a connecting rod; 6. a lifting assembly; 61. a section bar bracket; 62. a guide rod; 63. a movable block; 64. an electric push rod; 71. a lateral drive mechanism; 711. a transverse slide rail; 72. printing a scraping assembly; 721. a printing frame; 722. a scraper; 723. a pushing plate; 724. a first hanger bar; 725. a first connection block; 726. a first regulating piece; 727. a first adjusting cylinder; 728. a first fine tuning horn; 73. a printing screen clamping assembly; 731. a suspension bracket; 732. an L-shaped supporting seat; 733. a second fine tuning horn; 734. a second hanger bar; 735. a second regulating piece; 736. a third fine tuning horn; 737. a connecting seat; 74. a left side clamping member; 741. a left slot; 742. a left L-shaped connecting block; 743. a fourth fine tuning horn; 75. a right side clamping member; 751. a right slot; 752. a right L-shaped connecting block; 753. and (3) a spring.

Detailed Description

The utility model is described in further detail below with reference to fig. 1-8.

The embodiment of the utility model discloses a screen printer with a positioning printing function, referring to fig. 1, the screen printer comprises a base and a printing device arranged on the base, wherein the base comprises a frame 1, a feeding station 2, a positioning station 3 and a discharging station 4 are sequentially arranged on the frame 1, a feeding conveyor belt 11 is arranged on the feeding station 2, the positioning station 3 and the discharging station 4 share a guiding conveyor belt 12, the guiding conveyor belt 12 is correspondingly arranged on an end extension line of the feeding conveyor belt 11, and the upper surface of the guiding conveyor belt 12 and the upper surface of the feeding conveyor belt 11 are on the same plane;

referring to fig. 2-6, the positioning station 3 comprises a workbench 31, a lifting mechanism 5 is arranged at the bottom of the workbench 31, the lifting mechanism 5 is installed on the frame 1 and used for driving the workbench 31 to lift up and down along the vertical direction, a yielding groove 311 is formed in the position, corresponding to the material guiding conveyor belt 12, of the workbench 31, the workbench 31 comprises a frame 312 and a table top 313, a side positioning component 32 is arranged in the middle of the frame 312, end positioning components 33 are symmetrically arranged on two sides of the side positioning component 32, guide grooves 3131 matched with the side positioning components 32 and the end positioning components 33 are respectively formed in the surface of the table top 313, the discharging station 4 comprises a plurality of extension frames 41, one ends of the extension frames 41 are fixed on the frame 1, support plates 42 are fixed on the surfaces of the other ends of the extension frames 41, the support plates 42 are symmetrically arranged on two sides of the material guiding conveyor belt 12, adjusting grooves are formed in the surfaces of the support plates 42, guide stop rods 43 are arranged on the adjusting grooves, and the guide stop rods 43 are fixed on the adjusting grooves through studs;

referring to fig. 4 and 5, the side positioning assembly 32 includes a first slide rail 321 parallel to the guiding conveyor belt 12, the first slide rail 321 is fixed on the frame 312, the first slide rail 321 is symmetrically connected with a T-shaped bracket 322 in a sliding manner, two sides of the top end of the T-shaped bracket 322 are vertically fixed with side positioning rods 323, a first driving assembly is arranged at the bottom of the first slide rail 321, and the first driving assembly is used for driving the T-shaped brackets 322 at two sides to slide;

the end positioning assembly 33 comprises a second slide rail 331 perpendicular to the first slide rail 321, the second slide rail 331 is fixed on the frame 312, an L-shaped support 332 is connected to the second slide rail 331 in a sliding manner, an end positioning rod 333 is vertically fixed at the top end of the L-shaped support 332, a second driving assembly is arranged at the bottom of the second slide rail 331, and the second driving assembly is used for driving the L-shaped supports 332 on two sides to perform relative movement.

Specifically, the first driving assembly and the second driving assembly each include a second servo motor, a second driven wheel and a second belt, the second servo motor and the second driven wheel are respectively installed on the frame 312, the second belt is installed on the driving shafts of the second driven wheel and the second servo motor, the T-shaped brackets 322 on two sides are installed on the corresponding second belt in a central symmetry manner, and the L-shaped brackets 332 on two sides are also installed on the corresponding second belt in a central symmetry manner.

Referring to fig. 6, the lifting mechanism 5 includes a symmetrically arranged rotating shaft 51, the rotating shaft 51 is rotatably connected to the frame 1, a first torsion bar 52 is fixed in the middle of the rotating shaft 51, a second torsion bar 53 is symmetrically fixed at a position of the rotating shaft 51 near the end, the first torsion bar 52 and the second torsion bar 53 are arranged in a V shape, a transmission rod 54 is hinged between the first torsion bars 52 at two sides, an electric telescopic rod 55 is also hinged on the first torsion bar 52 at one side, and a base of the electric telescopic rod 55 is hinged on the frame 1;

lifting rods 314 are fixed at four corners of a frame 312 of the workbench 31, guide sleeves 13 are arranged at positions of the symmetrical lifting rods 314 on the machine frame 1, the lifting rods 314 are movably arranged in the guide sleeves 13, connecting rods 56 are hinged to the bottom ends of the lifting rods 314, and the bottom ends of the connecting rods 56 are hinged to the second torsion bars 53.

When the lifting mechanism 5 works, the first torsion bar 52 can be pulled to move clockwise only by shortening the electric telescopic rod 55, the transmission rod 54 drives the rotating shafts 51 on two sides to rotate clockwise respectively, the second torsion bar 53 on the rotating shafts 51 lifts the lifting rod 314 through the connecting rod 56, at this time, the lifting of the workbench 31 can be realized, and otherwise, the electric telescopic rod 55 stretches to drive the workbench 31 to descend.

Referring to fig. 1, the printing device is correspondingly arranged above the positioning station 3, the printing device comprises a lifting assembly 6 and a plurality of printing mechanisms, the lifting assembly 6 is installed on the frame 1, the lifting assembly 6 comprises profile supports 61 which are symmetrically arranged, the profile supports 61 are perpendicular to the material guiding conveyor belt 12, guide rods 62 are fixed at two ends of the profile supports 61, the guide rods 62 can move up and down along the frame 1, movable blocks 63 which are parallel to the material guiding conveyor belt 12 are movably arranged in two sides of the frame 1, the bottom ends of the guide rods 62 are fixed with the movable blocks 63, electric push rods 64 are vertically fixed at the tops of the movable blocks 63, seats of the electric push rods 64 are fixed on the frame 1, the printing mechanisms are respectively installed on the profile supports 61 of the lifting assembly 6, the printing mechanisms comprise transverse driving mechanisms 71, and printing scraping assemblies 72 and printing screen clamping assemblies 73 are installed on the transverse driving mechanisms 71.

Referring to fig. 1, the transverse driving mechanism 71 includes a transverse sliding rail 711, and a first servo motor and a first driven wheel are respectively mounted at two ends of the transverse sliding rail 711, and a first belt is connected between an output end of the driving motor and the driven wheel.

Referring to fig. 1 and 7, the printing scraping assembly 72 includes a printing frame 721, the printing frame 721 is slidingly connected to a transverse sliding rail 711, the printing frame 721 is fixed on a first belt, a scraper 722 and a pushing plate 723 are arranged at the bottom of the printing frame 721, first hanging rods 724 are symmetrically fixed at the tops of the scraper 722 and the pushing plate 723 respectively, a first connecting block 725 is fixed between the tops of the two first hanging rods 724, a first adjusting plate 726 is arranged at the bottom of the first connecting block 725, the first adjusting plate 726 is movably sleeved and connected to the first hanging rod 724, the first hanging rod 724 penetrates through the printing frame 721, first adjusting cylinders 727 are respectively arranged at the tops of the corresponding scraper 722 and the pushing plate 723 on the printing frame 721, the piston rod ends of the first cylinders are fixed with the first adjusting plates 726, a first fine-tuning amplitude transformer 728 is connected to the first connecting block 725 in a threaded manner, and the bottom end of the first fine-tuning amplitude transformer 728 is rotatably connected to the first adjusting plate 726.

When the positions of the scraping plate 722 and the pushing plate 723 need to be adjusted, the first adjusting air cylinder 727 is used for working to extend or shorten and drive the first hanging rod 724 to lift through the first adjusting sheet 726, so that the positions of the scraping plate 722 and the pushing plate 723 are driven to be adjusted, then the first fine adjustment amplitude rods 728 at the tops of the scraping plate 722 and the pushing plate 723 are respectively rotated, the first fine adjustment amplitude rods 728 are rotated to drive the first connecting blocks 725 to lift or descend, and then fine adjustment can be carried out on the first hanging rod 724, so that a more accurate working gap is formed between the scraping plate 722 and the pushing plate 723 and the screen.

Referring to fig. 1 and 8, the printing screen clamping assembly 73 is symmetrically provided with suspension frames 731, the suspension frames 731 are slidably connected to the transverse sliding rail 711, a first locking stud is further connected between the suspension frames 731 and the transverse sliding rail 711, a suspension module is slidably connected to the suspension frames 731, the suspension module comprises an L-shaped supporting seat 732, the L-shaped supporting seat 732 is slidably connected to the suspension frames 731, a second fine tuning horn 733 is connected between the L-shaped supporting seat 732 and the suspension frames 731, the second fine tuning horn 733 can accurately adjust the longitudinal position of the suspension module, the second suspension bars 734 are symmetrically and movably connected to the L-shaped supporting seat 732, a second adjusting piece 735 is connected between the tops of the second suspension bars 734 at two sides, a third fine tuning horn 736 is connected to the second adjusting piece 735 in a threaded manner, the bottom end of the third fine tuning horn 736 is rotatably connected to the L-shaped supporting seat 732, a connecting seat 737 is symmetrically and fixedly arranged at the bottoms of the second fine tuning horn 734 at two sides, and the third fine tuning horn 736 can accurately adjust the connecting seat 737 in the height direction.

The printing screen clamping assembly 73 further comprises a screen clamping module, the screen clamping module comprises a left clamping piece 74 and a right clamping piece 75, the left clamping piece 74 comprises a left slot 741, a plurality of compression screws are connected to the left slot 741 in a threaded mode, a left L-shaped connecting block 742 is symmetrically connected to the left slot 741, the left L-shaped connecting block 742 is connected to a connecting seat 737 in a sliding mode, and a fourth fine adjustment amplitude transformer 743 is connected between the left L-shaped connecting block 742 and the connecting seat 737;

the right clamping member 75 includes a right slot 751, a plurality of compression screws are screwed on the right slot 751, a right L-shaped connection block 752 is symmetrically connected on the right slot 751, the right L-shaped connection block 752 is slidingly connected on the connection seat 737, and a spring 753 is arranged between the right L-shaped connection block 752 and the connection seat 737.

The two sides of the screen plate can be fastened in the left slot 741 and the right slot 751 through the compression screws, and then the fourth fine adjustment amplitude transformer 743 is rotated, so that the whole screen plate clamping module can be pushed to carry out left and right fine adjustment when the fourth fine adjustment amplitude transformer 743 rotates, and the screen plate can be accurately positioned to a place needing printing.

The implementation principle of the silk screen printing machine with the positioning printing function provided by the embodiment of the utility model is as follows:

before the same batch of production, the screen is replaced, and after accurate positioning, batch automatic production is started, the material is conveyed onto the material guiding conveyor belt 12 through the material conveying conveyor belt 11, the material guiding conveyor belt 12 drives the material to enter the positioning station 3 (namely the surface of the workbench 31), at the moment, the lifting mechanism 5 works to drive the workbench 31 to lift, the material can be directly lifted (the lifting height of the workbench 31 only needs to be separated from the material guiding conveyor belt 12, and meanwhile, the position of the surface of the workbench 31 corresponding to the material guiding conveyor belt 12 is provided with a yielding groove 311, in the lifting process of the material, the material guiding conveyor belt 12 does not need to be stopped, so that the starting and stopping load of the conveyor belt can be reduced), after the workbench 31 drives the material to lift, the side positioning rods 323 on two sides of the workbench 31 are driven to abut against two sides of the material through the second belt, the second servo motor in the end positioning assembly 33 works, and the end positioning rods 333 on two sides of the second belt drive the two sides of the material are abutted against two ends of the workbench 333, so that the material can be limited on the workbench 31;

the lifting assembly 6 in the printing device works, the electric push rod 64 in the lifting assembly 6 stretches to push the movable block 63 to move downwards, the movable block 63 pulls the guide rod 62 to move downwards, so that the printing mechanism is driven to move downwards, the screen plate in the printing mechanism is propped against the surface of a printed object, the first servo motor in the transverse driving mechanism 71 works to drive the printing scraping assembly 72 to move, and the scraping plate 722 and the pushing plate 723 in the printing scraping assembly 72 can be matched with the screen plate to perform printing;

after printing, the lifting assembly 6 drives the printing mechanism to reset, the lifting mechanism 5 drives the workbench 31 to descend and reset, the printed matter on the workbench 31 can be guided out to the discharging work by the material guiding conveyor belt 12, the feeding station 2 feeds materials again, automatic printing is carried out in sequence in a circulating mode, and the production efficiency is high.

The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (10)

1. The utility model provides a silk screen printing machine with location printing function, includes the base and installs the printing device on the base, its characterized in that: the base comprises a frame (1), a feeding station (2), a positioning station (3) and a discharging station (4) are sequentially arranged on the frame (1), a feeding conveyor belt (11) is arranged on the feeding station (2), the positioning station (3) and the discharging station (4) share a guiding conveyor belt (12), the guiding conveyor belt (12) is correspondingly arranged on an end extension line of the feeding conveyor belt (11), the upper surface of the guiding conveyor belt (12) and the upper surface of the feeding conveyor belt (11) are arranged on the same plane,

the printing device is correspondingly arranged above the positioning station (3), the printing device comprises a lifting assembly (6) and a plurality of printing mechanisms, the lifting assembly (6) is arranged on the frame (1), the printing mechanisms are respectively arranged on the lifting assembly (6), each printing mechanism comprises a transverse driving mechanism (71), and the printing scraping assembly (72) and the printing screen clamping assembly (73) are arranged on the transverse driving mechanism (71).

2. The screen printing machine with positioning printing function according to claim 1, wherein: the positioning station (3) comprises a workbench (31), a lifting mechanism (5) is arranged at the bottom of the workbench (31), the lifting mechanism (5) is arranged on a frame (1) and used for driving the workbench (31) to lift up and down along the vertical direction, a yielding groove (311) is formed in the position, corresponding to the guide conveyor belt (12), of the workbench (31), the workbench (31) comprises a frame (312) and a table top (313), a side positioning component (32) is arranged in the middle part in the frame (312), end positioning components (33) are symmetrically arranged on two sides of the side positioning component (32), guide grooves (3131) matched with the side positioning component (32) and the end positioning component (33) are formed in the surface of the table top (313) respectively,

the discharging station (4) comprises a plurality of extending frames (41), one ends of the extending frames (41) are fixed on the frame (1), supporting plates (42) are fixed on the surfaces of the other ends of the extending frames (41), the supporting plates (42) are symmetrically arranged on two sides of the material guiding conveyor belt (12), regulating grooves are formed in the surfaces of the supporting plates (42), guide stop rods (43) are arranged on the regulating grooves, and the guide stop rods (43) are fixed on the regulating grooves through studs.

3. The screen printing machine with positioning printing function according to claim 2, wherein: the side positioning assembly (32) comprises a first sliding rail (321) which is parallel to the material guiding conveyor belt (12), the first sliding rail (321) is fixed on the frame (312), T-shaped brackets (322) are symmetrically connected to the first sliding rail (321) in a sliding mode, side positioning rods (323) are vertically fixed to two sides of the top end of each T-shaped bracket (322), a first driving assembly is arranged at the bottom of each first sliding rail (321), and the first driving assembly is used for driving the T-shaped brackets (322) on two sides to slide.

4. A screen printing machine with positioning printing function according to claim 3, characterized in that: the end positioning assembly (33) comprises a second sliding rail (331) perpendicular to the first sliding rail (321), the second sliding rail (331) is fixed on the frame (312), an L-shaped support (332) is connected to the second sliding rail (331) in a sliding mode, an end positioning rod (333) is vertically fixed to the top end of the L-shaped support (332), a second driving assembly is arranged at the bottom of the second sliding rail (331), and the second driving assembly is used for driving the L-shaped supports (332) on two sides to perform relative motion.

5. The screen printing machine with positioning printing function according to claim 2, wherein: the lifting mechanism (5) comprises a rotating shaft (51) which is symmetrically arranged, the rotating shaft (51) is rotationally connected to the frame (1), a first torsion bar (52) is fixed in the middle of the rotating shaft (51), a second torsion bar (53) is symmetrically fixed at the position, close to the end part, of the rotating shaft (51), the first torsion bar (52) and the second torsion bar (53) are arranged in a V-shaped mode, a transmission rod (54) is hinged between the first torsion bar (52) on two sides, an electric telescopic rod (55) is hinged on the first torsion bar (52) on one side, a base of the electric telescopic rod (55) is hinged on the frame (1),

lifting rods (314) are fixed at four corners of a frame (312) of the workbench (31), guide sleeves (13) are arranged at positions symmetrical to the lifting rods (314) on the rack (1), the lifting rods (314) are movably arranged in the guide sleeves (13), connecting rods (56) are hinged to the bottom ends of the lifting rods (314), and the bottom ends of the connecting rods (56) are hinged to the second torsion bars (53).

6. The screen printing machine with positioning printing function according to claim 1, wherein: lifting assembly (6) are including section bar support (61) that the symmetry set up, section bar support (61) perpendicular to guide conveyer belt (12) set up, section bar support (61) both ends are fixed with guide bar (62), guide bar (62) can be followed frame (1) reciprocates, frame (1) both sides inside activity is equipped with movable block (63) that are on a parallel with guide conveyer belt (12), guide bar (62) bottom with movable block (63) are fixed, movable block (63) top is vertical to be fixed with electric putter (64), the seat of electric putter (64) is fixed in frame (1).

7. The screen printing machine with positioning printing function according to claim 6, wherein: the transverse driving mechanism (71) comprises a transverse sliding rail (711), a first servo motor and a first driven wheel are respectively arranged at two ends of the transverse sliding rail (711), and a first belt is connected between the first servo motor and the first driven wheel.

8. The screen printing machine with positioning printing function according to claim 7, wherein: the printing scraping assembly (72) comprises a printing frame (721), the printing frame (721) is connected to the transverse sliding rail (711) in a sliding mode, the printing frame (721) is fixed on the first belt, a scraping plate (722) and a pushing plate (723) are arranged at the bottom of the printing frame (721), first hanging rods (724) are symmetrically fixed at the tops of the scraping plate (722) and the pushing plate (723) respectively, and two first hanging rods (724) are fixed between the tops of the first hanging rods (724)

There is first connecting block (725), first connecting block (725) bottom is equipped with first regulating plate (726), first regulating plate (726) movable sleeve is established and is connected on first hanging pole (724), first hanging pole (724) run through printing frame (721) setting, correspond on printing frame (721) the top of scraper blade (722) and flitch (723) is equipped with first regulation cylinder (727) respectively, the piston rod tip of first regulation cylinder (727) with first regulating plate (726) are fixed, threaded connection has first fine setting amplitude pole (728) on first connecting block (725), first fine setting amplitude pole (728) bottom rotation is connected on first regulating plate (726).

9. The screen printing machine with positioning printing function according to claim 7, wherein: the printing screen clamping assembly (73) is symmetrically arranged on a suspension bracket (731), the suspension bracket (731) is connected to the transverse sliding rail (711) in a sliding manner, a first locking stud is further connected between the suspension bracket (731) and the transverse sliding rail (711), a suspension module is connected to the suspension bracket (731) in a sliding manner, the suspension module comprises an L-shaped supporting seat (732), the L-shaped supporting seat (732) is connected to the suspension bracket (731) in a sliding manner, a second fine tuning rod (733) is connected between the L-shaped supporting seat (732) and the suspension bracket (731), a second suspension rod (734) is connected to the L-shaped supporting seat (732) in a symmetrical manner, a second adjusting plate (735) is connected between the tops of the second suspension rod (734) on two sides, a third fine tuning rod (736) is connected to the second fine tuning rod (736) in a threaded manner, the bottom end of the third fine tuning rod (736) is rotationally connected to the L-shaped supporting seat (732), and the two sides of the second fine tuning rod (734) are fixedly connected to the second luffing rod (734) in a symmetrical manner (7).

10. The screen printing machine with positioning printing function according to claim 9, wherein: the printing screen clamping assembly (73) further comprises a screen clamping module, the screen clamping module comprises a left clamping piece (74) and a right clamping piece (75), the left clamping piece (74) comprises a left slot (741), a plurality of compression screws are connected to the left slot (741) in a threaded mode, left L-shaped connecting blocks (742) are symmetrically connected to the left slot (741), the left L-shaped connecting blocks (742) are connected to a connecting seat (737) in a sliding mode, and a fourth fine-tuning amplitude transformer (743) is connected between the left L-shaped connecting blocks (742) and the connecting seat (737);

the right side holder (75) is including right side slot (751), threaded connection has a plurality of compression screws on right side slot (751), symmetrical connection has right L shape connecting block (752) on right side slot (751), right L shape connecting block (752) slip connect on connecting seat (737), just right L shape connecting block (752) with be equipped with spring (753) between connecting seat (737).