CN115302956A

CN115302956A - Digital printing machine

Info

Publication number: CN115302956A
Application number: CN202210984824.1A
Authority: CN
Inventors: 徐勇强; 李芝明; 冯超勇
Original assignee: Zhejiang Puqi Digital Technology Co ltd
Current assignee: Zhejiang Puqi Digital Technology Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2022-11-08
Anticipated expiration: 2042-08-17
Also published as: CN115302956B

Abstract

The invention discloses a digital printer. The automatic plate feeding machine comprises a frame, a printing platform is arranged on the frame, a first conveying belt used for conveying plates is arranged on the printing platform along the front-back direction, a first pressure roller, a second pressure roller and a third pressure roller are arranged above the printing platform, the first pressure roller, the second pressure roller and the third pressure roller are sequentially arranged from front to back along the printing platform at intervals, a printing interval is arranged between the second pressure roller and the third pressure roller, a first lifting assembly used for driving the first pressure roller to lift is arranged on the frame, a second lifting assembly used for driving the second pressure roller to lift and a third lifting assembly used for driving the third pressure roller to lift, a printing mechanism is arranged above the printing interval, and a feeding mechanism used for conveying plates to the first conveying belt is arranged at the front end of the frame. The invention can flatten the plate on the printing platform, and ensure the accuracy of the printed pattern.

Description

Digital printing machine

Technical Field

The invention relates to the technical field of digital printing, in particular to a digital printing machine.

Background

At present, the digital brushing machine is widely applied to the processing industries of ceramic tiles, glass, wood, plates, fabrics and the like. In panel packing printing trade, the digital brush of beating is progressively replacing original traditional printing, and when having printed panel of digital printer, when there was the limit of sticking up or the crooked scheduling problem of plate body in panel, this type of panel when printing, the pattern can appear the dislocation, the circumstances such as crooked, need artifically level it, extravagant manpower, influence printing effect and efficiency.

Disclosure of Invention

The invention aims to solve the problem that the printing effect is influenced because the conventional printing machine cannot neatly arrange plates, and provides a digital printing machine, which can automatically level the plates and improve the printing efficiency.

In order to solve the problems, the invention adopts the following technical scheme to realize:

the invention discloses a digital printing machine which comprises a machine frame, wherein a printing platform is arranged on the machine frame, a first conveying belt for conveying plates is arranged on the printing platform along the front-back direction, a first pressure roller, a second pressure roller and a third pressure roller are arranged above the printing platform, the first pressure roller, the second pressure roller and the third pressure roller are sequentially arranged along the printing platform at intervals from front to back, a printing area of the printing platform is an area between the second pressure roller and the third pressure roller, a first lifting assembly for driving the first pressure roller to lift, a second lifting assembly for driving the second pressure roller to lift and a third lifting assembly for driving the third pressure roller to lift are arranged on the machine frame, a printing mechanism is arranged above the printing area, and a feeding mechanism for conveying plates to the first conveying belt is arranged at the front end of the machine frame.

In this scheme, according to the thickness of waiting to print panel, with first nip roll, second nip roll and third nip roll adjustment to with wait to print the height of panel looks adaptation, feed mechanism transmits panel to first conveyer belt on, when first conveyer belt transmission panel, first nip roll is tentatively leveled panel, when panel reachs when printing the interval, the second nip roll and third nip roll will be located the panel flattening that prints the region, the guarantee prints the accuracy of pattern.

As preferred, first elevating system includes that two symmetries set up the first elevation structure at first nip roll both ends, second elevation system includes that two symmetries set up the second elevation structure at second nip roll both ends, third elevation system includes that two symmetries set up the third elevation structure at third nip roll both ends, first elevation structure, second elevation structure and third elevation structure are unanimous, all include the elevator, be used for driving the motor that the elevator goes up and down and be located the stopper in the elevator outside, the roller of nip roll rotates with the elevator to be connected and wears out the elevator, the vertical bar spacing groove that is equipped with on the stopper, the part that the elevator was worn out to the roller stretches into in the bar spacing groove.

Preferably, the lifting block is provided with an induction sheet, the limiting block is provided with a limiting sensor, and the induction sheet is located above the limiting sensor.

Preferably, the printing platform is provided with a first cavity, a plurality of first perforations are uniformly arranged on the first conveying belt, a plurality of bar-shaped grooves are uniformly arranged on the top surface of the printing platform and correspond to the first perforations, a plurality of first adsorption holes communicated with the first cavity are uniformly arranged on the bottom surface of each bar-shaped groove, the trend of each bar-shaped groove is consistent with the conveying direction of the first conveying belt, a plurality of first air suction ports communicated with the first cavity are arranged on the bottom surface of the printing platform side by side and are arranged at equal intervals, a first air suction mechanism is arranged on the rack, and the first air suction ports are connected with the first air suction mechanism through first air suction pipes. In the time of the actual work, first suction mechanism is with the gas suction in the first cavity, form the negative pressure in the first cavity, when first conveyer belt removes/is static, there is first perforation and first adsorption hole intercommunication all the time, the realization is inhaled tightly panel on first conveyer belt, it can not rock on print platform to realize panel when printing, panel is also inhaled the tie on print platform simultaneously, through setting up the bar groove, the adsorption affinity of print platform to the panel on the first conveyer belt has been increased.

Preferably, a plurality of partition plates are arranged in the first cavity side by side along the left-right direction, the intervals of the partition plates are consistent, the first cavity is divided into a plurality of independent adsorption cavities by the partition plates, the first air inlets are in one-to-one correspondence with the independent adsorption cavities, and the first air inlets are communicated with the corresponding independent adsorption cavities. The first air suction openings correspond to the independent adsorption cavities one to one, and the consistency of negative pressure in the independent adsorption cavities is guaranteed.

Preferably, the frame is provided with a transfer beam, the transfer beam is provided with a second cavity, the transfer beam is provided with a plurality of through holes communicated with the second cavity, the through holes are symmetrically arranged at the left end and the right end of the transfer beam and are in one-to-one correspondence with the first air suction ports, the through holes are in sealing connection with the corresponding first air suction ports through first air suction pipes, the first air suction mechanisms are communicated with the second cavity through second air suction pipes, and the second air suction pipes are arranged in the middle of the transfer beam. During actual work, the first air suction mechanism sucks the gas in the second cavity through the first air suction pipe, negative pressure is formed in the second cavity, the negative pressure intensity of the second cavity is gradually attenuated to be stable from the middle part to the two ends, the negative pressure at the through holes is basically consistent by arranging the through holes symmetrically arranged at the two ends of the transfer beam, the negative pressure at the through holes is basically consistent, the negative pressure in the first cavity is basically consistent, and the aim of enabling the printing platform to have uniform adsorption force on the plate is fulfilled; specifically, the number of the partition plates is 5, the first cavity is divided into 6 independent adsorption cavities with the same size, the number of the through holes is 6, each through hole is in sealing connection with the corresponding first air suction opening through a first air suction pipe, 3 of the through holes are located at the leftmost end of the transfer beam and are tightly attached to each other, the other 3 of the through holes are located at the rightmost end of the transfer beam and are tightly attached to each other, an air suction hole is arranged in the middle of the transfer beam and is connected with a second air suction pipe, the distance between the air suction hole and the through hole closest to the left side of the air suction hole is d1, the distance between the air suction hole and the through hole closest to the right side of the air suction hole is d2, d1= d2 is set, and negative pressures at two ends of the transfer beam are basically consistent; the two ends are tightly attached to each other by arranging 3 through holes; the negative pressure at the three through holes is ensured to be basically consistent.

Preferably, the first air suction pipes are provided with valves. During actual work, the width of the plate is printed as required, and the corresponding valve is opened, so that the purpose of saving cost is achieved.

Preferably, the printing mechanism includes the crossbeam, set up the printer head on the crossbeam, be used for the drive to beat printer head along crossbeam reciprocating motion's a actuating mechanism and be used for the drive to beat printer head first elevating system that goes up and down, it is connected with the mechanism that adds the china ink to beat printer head, beat printer head's shower nozzle orientation and print the interval and be located and print the interval directly over, one side of frame is equipped with the mechanism that moisturizes that is used for moisturizing the shower nozzle, the mechanism that moisturizes is located the below of crossbeam, the bottom surface of crossbeam is equipped with the supplied materials inductor. The ink adding mechanism comprises an ink barrel, an ink supply pump and an ink box, wherein the ink barrel supplies ink to the ink box through the ink supply pump, and the ink box is connected with the printing head. The ink barrel is connected with the ink box through an ink pipe, and the ink box is connected with the printing head through an ink pipe.

As preferred, first elevating system includes the lead screw of vertical setting, overlaps establishes screw-nut on the lead screw, is used for driving lead screw pivoted motor and the connecting plate that links to each other with a actuating mechanism, beat printer head including printing the frame, the motor with print frame fixed connection, it is equipped with the bar groove along vertical direction on the frame to print, fixedly connected with link on the screw-nut, the link passes behind the bar groove with connecting plate fixed connection, the front side bilateral symmetry of printing the frame is equipped with two sliders, be equipped with two slide rails on the connecting plate, slider and slide rail one-to-one, the slider slides and sets up on the slide rail that corresponds. During actual work, the motor drives the screw rod to move up and down along the screw rod nut, and the screw rod drives the printing frame to move up and down, so that the printing head can lift up and down.

Preferably, a first bearing seat is sleeved at the upper end of the screw rod, a second bearing seat is sleeved at the lower end of the screw rod, the first bearing seat and the second bearing seat are fixedly connected to the printing frame, limit sensors are arranged on the first bearing seat and the second bearing seat respectively, and trigger pieces corresponding to the limit sensors are arranged on the screw rod nuts. During actual work, beat printer head and go up and down according to predetermined height, trigger the piece promptly and remove between two spacing sensors, the printer head of normal work, trigger piece and spacing sensor can not contact, breaks down when elevating system, triggers piece and spacing sensor contact, and elevating system stop work this moment.

Preferably, the moisturizing mechanism includes the bottom plate, be equipped with the moisturizing dish on the bottom plate, be equipped with a plurality of ink absorption stacks in the moisturizing dish, be equipped with moisturizing liquid in the ink absorption stack, be equipped with the second actuating mechanism that is used for driving the moisturizing dish and removes along the bottom plate fore-and-aft direction on the bottom plate, the rear end of moisturizing dish is equipped with scrapes the china ink piece, it is located ink absorption stack positive rear to scrape the china ink piece, the top of scraping the china ink piece is higher than the top surface of ink absorption stack.

Preferably, an ink storage groove is formed in the moisture preservation disc, the ink scraping sheet is arranged in the ink storage groove, and the ink storage groove is communicated with the ink discharge groove.

As preferred, feed mechanism includes conveying subassembly and material all in one piece subassembly, the conveying subassembly is including passing the material platform, it is equipped with a plurality of second transmission bands along left right direction equidistance on the material platform to pass, the rear end of second transmission band meets with the front end of first transmission band, material all in one piece subassembly includes that guide bar, the symmetry that sets up along passing the material platform left and right sides direction set up sets up two material all in one plates on the guide bar and be used for driving the drive assembly that two material all in one plates are close to relatively/keep away from, be equipped with the striker assembly on the guide bar, the striker assembly includes striker plate and installation piece, the installation piece sets up on the guide bar, the striker plate sets up on the installation piece and can follow the quick up-and-down slip of installation, the striker plate is located the front side of installation piece, be equipped with the regulation structure that is used for adjusting the striker plate height on the installation piece.

Preferably, the lower end of the material baffle is connected with a material pressing plate, the material pressing plate is arranged in parallel relative to the belt surface of the second conveying belt, the front side of the material pressing plate is provided with a folded edge which is bent upwards, and the folded edge is positioned in front of the first material pressing roller.

As preferred, it has the third cavity to pass the material platform, the top surface that passes the material platform is equipped with a plurality of adsorption zones along left right direction equidistance, adsorption zone and second transmission band one-to-one, adsorption zone is located the below that corresponds the second transmission band, evenly be equipped with a plurality of second in the adsorption zone and adsorb the hole, evenly be equipped with a plurality of second on the second transmission band and perforate, the fenestrate aperture of second is less than the aperture that the second adsorbed the hole, the bottom surface interval that passes the material platform is equipped with a plurality of second inlet scoops, second inlet scoop and second adsorption hole all communicate with the third cavity, second inlet scoop and second adsorption hole dislocation set, the second inlet scoop is continuous with the second mechanism of induced drafting through the third aspiration channel.

As preferred, adjust the structure including adjusting pole and the connecting plate of level setting in the striker plate upper end, the connecting plate is located the installation piece directly over, adjust the vertical setting of pole, the upper portion and the connecting plate of adjusting the pole rotate to be connected, the lower part of adjusting the pole is equipped with the screw thread, the top surface of installation piece is equipped with the screw hole with screw thread looks adaptation, be equipped with the bar hole along vertical direction on the striker plate, be equipped with the spacer pin with bar hole looks adaptation on the installation piece.

As preferred, the place ahead of passing the material platform is equipped with holds in the palm system mechanism, hold in the palm paper mechanism and set up the support paper subassembly in the frame both sides including the symmetry, hold in the palm the paper subassembly and include the cantilever, the cantilever level sets up and extends towards the place ahead of frame, the inboard of cantilever is equipped with the slide rail along the cantilever trend, be equipped with the slider on the slide rail, be equipped with the bearing roller that is used for supporting panel between two sliders, be equipped with the pivot between two cantilevers, the pivot is connected with the swing roller, the relative pivot parallel arrangement of swing roller, the one end of pivot is connected with and is used for driving pivot pivoted guiding mechanism. The automatic feeding of the printing platform is realized by arranging the material conveying platform; by arranging the paper supporting mechanism, large-size plates can be conveyed, and the application range of the invention is expanded.

The invention has the beneficial effects that: the first material pressing roller is arranged to realize preliminary flattening of the plate, and the second material pressing roller and the third material pressing roller are arranged to realize flattening of the plate in the printing area and guarantee accuracy of printed patterns; by arranging the first air suction mechanism, the plate is sucked and tightly clamped on the printing platform, and meanwhile, the plate is sucked and flatly arranged on the printing platform, so that the accuracy of pattern printing is further guaranteed; the automatic cleaning of the printing head nozzle is realized by arranging the ink scraping sheet, so that the use of manpower is reduced; through setting up feeding mechanism, realized transporting panel one by one to printing platform.

Drawings

FIG. 1 is a schematic view of a digital printer;

FIG. 2 is a schematic illustration of a printing platform and a first conveyor belt;

FIG. 3 is a schematic view of a first suction mechanism and a frame;

FIG. 4 is a schematic view of a printing platform;

FIG. 5 is an enlarged schematic view at A in FIG. 4;

FIG. 6 is an internal schematic view of a printing platform;

FIG. 7 is a schematic view of a transfer beam;

FIG. 8 is a schematic view of a beam and a printhead;

FIG. 9 is a cross-sectional view of a printhead;

FIG. 10 is a schematic view of a moisturizing tray;

FIG. 11 is a sectional view of the side of the moisturizing tray;

FIG. 12 is a schematic view of a feeding mechanism;

FIG. 13 is a schematic view of another angle of the feed mechanism;

FIG. 14 is a schematic view of a mounting block, striker plate, and swage plate;

FIG. 15 is a schematic view of a transfer platform and a second conveyor;

FIG. 16 is a schematic illustration of the inking of a print head.

The figures are numbered:

1. a frame; 2. a printing platform; 3. a first conveyor belt; 4. a first nip roll; 5. a second nip roll; 6. a third nip roll; 7. printing the interval; 8. a first cavity; 9. a first perforation; 10. a strip-shaped groove; 11. a first adsorption hole; 12. a first air suction port; 13. a first air suction pipe; 14. a partition plate; 15. a transfer beam; 16. a second cavity; 17. a through hole; 18. a valve; 19. a cross beam; 20. a print head; 21. an incoming material sensor; 22. a base plate; 23. a moisture retention tray; 24. an ink absorbing stack; 25. scraping the ink sheet; 26. a material conveying platform; 27. a second conveyor belt; 28. a guide rod; 29. material preparation plates; 30. a striker plate; 31. mounting blocks; 32. a material pressing plate; 33. folding edges; 34. a third cavity; 35. a second adsorption hole; 36. a second perforation; 37. a second aspiration channel; 38. a third air suction pipe; 39. an ink discharge slot; 40. an ink discharge hole; 41. printing a spray head; 42. A screw rod; 43. a feed screw nut; 44. a motor; 45. a first bearing housing; 46. a second bearing housing; 47. a trigger piece; 48. a limit sensor; 49. a connecting frame; 50. an air exhaust hole; 51. an ink tank; 52. an ink supply pump; 53. a filter; 54. an ink cartridge; 55. a first liquid level sensor; 56. A second liquid level sensor; 57. a buffer bottle; 58. a three-way valve; 59. a positive pressure control system; 60. A negative pressure control system.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Example (b): the digital printing machine comprises a frame 1, wherein a printing platform 2 is arranged on the frame 1, a first conveying belt 3 for conveying plates is arranged on the printing platform 2 along the front-back direction, a first pressure roller 4, a second pressure roller 5 and a third pressure roller 6 are arranged above the printing platform 2, the first pressure roller 4, the second pressure roller 5 and the third pressure roller 6 are sequentially arranged along the printing platform 2 from front to back at intervals, a printing section 7 of the printing platform 2 is arranged in an area between the second pressure roller 5 and the third pressure roller 6, a first lifting component for driving the first pressure roller 4 to lift, a second lifting component for driving the second pressure roller 5 to lift and a third lifting component for driving the third pressure roller 6 to lift are arranged on the frame 1, a printing mechanism is arranged above the printing section 7, and a feeding mechanism for conveying plates to the first conveying belt 3 is arranged at the front end of the frame 1.

In this scheme, according to the thickness of waiting to print panel, adjust first nip roll 4, second nip roll 5 and third nip roll 6 to with wait the height of printing panel looks adaptation, feed mechanism transmits panel to first conveyer belt 3 on, when first conveyer belt 3 transmits panel, first nip roll 4 is tentatively pressed panel and is leveled, when panel reachs printing interval 7, second nip roll 5 and third nip roll 6 will be located the panel of printing the region and press and level, the guarantee prints the accuracy of pattern. The first lifting assembly is used as an example, the first lifting assembly comprises lifting structures symmetrically arranged at two ends of a first pressure roller 4, each lifting structure comprises a lifting block, a motor for driving the lifting block to lift and a limiting block located on the outer side of the lifting block, a roller shaft of the first pressure roller 4 is rotatably connected with the lifting block and penetrates out of the lifting block, a strip-shaped limiting groove is vertically formed in the limiting block, the part, penetrating out of the lifting block, of the roller shaft extends into the strip-shaped limiting groove, an induction sheet is arranged on the lifting block, a limiting sensor is arranged on the limiting block, the induction sheet is located above the limiting sensor, and is connected with the limiting sensor during working, and the induction sheet is located at the lowest position at the moment; inputting a given value according to the thickness of the plate, and controlling a lifting motor to drive a lifting block to drive a first material pressing roller 4 to ascend; by arranging the limiting groove, the lifting range of the lifting block is limited, namely the lifting range of the first nip roll 4 is limited. In this embodiment, first elevating system includes that two symmetries set up the first elevation structure at first nip roll both ends, second elevation system includes that two symmetries set up the second elevation structure at second nip roll both ends, third elevation system includes that two symmetries set up the third elevation structure at third nip roll both ends, first elevation structure, second elevation structure and third elevation structure are unanimous, all include the elevator, a motor for driving the elevator goes up and down and be located the stopper in the elevator outside, the roller of nip roll rotates with the elevator to be connected and wears out the elevator, the vertical bar spacing groove that is equipped with on the stopper, the part that the roller wore out the elevator stretches into in the bar spacing groove, be equipped with the response piece on the elevator, be equipped with spacing sensor on the stopper, the response piece is located spacing sensor's top. The first conveying belt 3 is arranged on the rack through a driving roller and a driven roller, a tensioning mechanism is arranged on one side of the rack and connected with the driven roller, and the tensioning mechanism is used for driving the driven roller to be far away from or close to the driving roller so as to adjust the tensioning degree of the first conveying belt.

As shown in fig. 4 to 6, the printing platform 2 has a first cavity 8, a plurality of first perforations 9 are uniformly arranged on the first conveyor belt 3, a plurality of bar-shaped grooves 10 are uniformly arranged on the top surface of the printing platform 2, the bar-shaped grooves 10 correspond to the first perforations 9, a plurality of first adsorption holes 11 communicated with the first cavity 8 are uniformly arranged on the bottom surface of the bar-shaped grooves 10, the direction of the bar-shaped grooves 10 is consistent with the conveying direction of the first conveyor belt 3, a plurality of first air suction ports 12 communicated with the first cavity 8 are arranged on the bottom surface of the printing platform 2 side by side, the plurality of first air suction ports 12 are arranged at equal intervals, a first air suction mechanism is arranged on the frame 1, and the first air suction ports 12 are connected with the first air suction mechanism through first air suction pipes 13, specifically, be equipped with a plurality of baffles 14 along the fore-and-aft direction in the first cavity 8, the interval of baffle 14 is unanimous, a plurality of baffles 14 are cut apart into a plurality of independent absorption chambeies with first cavity 8, first suction opening 12 and independent absorption chamber one-to-one, the independent absorption chamber that first suction opening 12 intercommunication corresponds, be equipped with switching roof beam 15 in the frame 1, switching roof beam 15 has second cavity 16, be equipped with a plurality of through-holes 17 with the 16 intercommunications of second cavity on the switching roof beam 15, through-hole 17 and first suction opening 12 one-to-one, through-hole 17 passes through first suction pipe 13 sealing connection with corresponding first suction opening 12, all be equipped with valve 18 on the first suction pipe 13, first suction fan constructs including first suction fan, first suction fan stretches into in the second cavity 16 of switching roof beam 15 through second suction pipe 37. The plurality of through holes 17 are symmetrically distributed at both ends of the transfer beam 15, and the second air suction pipe 37 is connected to the middle of the transfer beam 15. In the time of actual work, the gaseous suction of first suction mechanism in with first cavity 8, form the negative pressure in the first cavity 8, when first conveyer belt 3 removes/is static, there is first perforation 9 and first absorption hole 11 intercommunication all the time, the realization is inhaled tightly panel on first conveyer belt 3, guarantee panel can not rock on print platform 2 when printing, panel is also inhaled the tie on print platform 2 simultaneously, it is concrete, the interval of a plurality of inlet vents is unanimous, it is unanimous to ensure the negative pressure in a plurality of independent absorption chambeies, thereby realize print platform 2 to the suction evenly distributed of panel. In addition, the width of the plate is printed according to the requirement, and the corresponding valve 18 is opened, so that the aim of saving cost is fulfilled; through setting up bar groove 10, increased print platform 2 to the adsorption affinity of panel on the first conveyer belt 3. It should be noted that the second air suction pipe 37 sucks the air in the second cavity 16, negative pressure is formed in the second cavity 16, and at this time, the negative pressure at a position in the second cavity 16 close to the second air suction pipe 37 is stronger, and the plurality of through holes 17 are symmetrically distributed at two ends of the transfer beam 15, so that the negative pressures at the plurality of through holes 17 are basically kept consistent, and the uniform adsorption force of the printing platform 2 on the plate is ensured. In this embodiment, the number of the partition plates is 5, the first cavity is divided into 6 independent adsorption cavities with the same size, the number of the through holes is 6, each through hole 17 is hermetically connected with the corresponding first air suction opening through a first air suction pipe, 3 through holes 17 are located at the leftmost end of the transfer beam 15 and are tightly attached to each other, the other 3 through holes 17 are located at the rightmost end of the transfer beam 15 and are tightly attached to each other, an air suction hole 50 is arranged in the middle of the transfer beam 15, the air suction hole 50 is connected with a second air suction pipe, the distance between the air suction hole 50 and the through hole closest to the left side of the air suction hole is d1, the distance between the air suction hole 50 and the through hole 17 closest to the right side of the air suction hole is d2, d1= d2 is set, and negative pressures at two ends of the transfer beam 15 are basically consistent; the 3 through holes 17 are arranged to be mutually attached; the negative pressure at the three through holes 17 is ensured to be basically consistent.

As shown in fig. 8 to 11, the printing mechanism includes a beam 19, a printing head 20 disposed on the beam 19, a first driving mechanism for driving the printing head 20 to reciprocate along the beam 19, and a first lifting mechanism for driving the printing head 20 to lift, the printing head 20 is connected with an ink adding mechanism, a nozzle of the printing head 20 faces the printing section 7 and is located right above the printing section 7, one side of the frame 1 is provided with a moisturizing mechanism for moisturizing the nozzle, the moisturizing mechanism is located below the beam 19, a bottom surface of the beam 19 is provided with a supplied material sensor 21, the moisturizing mechanism includes a bottom plate 22, the bottom plate 22 is provided with a moisturizing tray 23, a plurality of ink absorbing stacks 24 are disposed in the moisturizing tray 23, the plurality of ink absorbing stacks 24 are arranged in two rows, and a moisturizing liquid is disposed in the ink absorbing stacks 24, be equipped with the second actuating mechanism that is used for driving moisturizing dish 23 to remove along bottom plate 22 fore-and-aft direction on the bottom plate 22, the rear end of moisturizing dish 23 is equipped with scrapes the china ink piece 25, it is located the positive rear of inhaling china ink stack 24 to scrape china ink piece 25, the top of scraping china ink piece 25 is higher than the top surface of inhaling china ink stack 24, it sets up to preceding down dip from the back to scrape china ink piece 25, it sets up the scraping head to scrape the top of china ink piece 25, it includes a plurality of printing shower nozzles 41 to beat printer head 20, printing shower nozzle 41 and inhaling china ink stack 24 one-to-one, be equipped with row's china ink groove 39 on the moisturizing dish 23, it is located between two rows of inhaling china ink stacks 24 to arrange the china ink groove 39, the bottom surface of row's china ink groove 39 is equipped with row's china ink hole 40, the bottom surface of base is equipped with the guide groove that communicates with row's china ink groove and guide groove's row's ink passageway is equipped with in the base. Before printing, the nozzle of the printing nozzle 41 is in contact with the sponge block, ink sprayed by the printing nozzle 41 enters the groove, the sponge block is washed by the ink, then the ink enters the ink guide groove from the ink discharge passage, then enters the ink discharge groove 39 from the ink guide groove, and finally flows out of the moisture preservation disc 23 from the ink discharge hole 40 in the ink discharge groove 39. In the above process, the printing nozzles 41 correspond to the ink stacks 24 one by one, so that color crosstalk between different printing nozzles 41 is avoided. By arranging the sealing rubber ring, the sealing performance between the printing nozzle 41 and the ink absorbing stack 24 is guaranteed; the sponge has excellent water absorption and is easy to store moisturizing liquid, so that the purpose of moisturizing the printing nozzle 41 for a long time is achieved. When ink needs to be scraped from the printing nozzle, the printing nozzle is driven to be right above the ink absorption stack 24, the second driving mechanism is started, the moisturizing disc 23 drives the ink scraping sheet 25 to move forwards until the upper end of the ink scraping sheet 25 scrapes the nozzle of the printing nozzle 41, at the moment, ink at the nozzle flows into the moisturizing disc 23 along the ink scraping sheet 25, then the printing nozzle 41 is moved away, finally, the second driving mechanism drives the moisturizing disc 23 to reset, and in addition, the ink scraping sheet 25 can repeatedly scrape the printing nozzle 41; when the incoming material induction sensor detects that the sheet material is conveyed to the lower part of the cross beam 19, the printing head 20 is sent out to command the printing head 20 to print the sheet material; the two ends of the cross beam 19 are symmetrically provided with limit switches, when the printer head is actually used, the printer head prints according to a preset width, namely, the printer head reciprocates between the two limit switches, the printer head can not trigger the limit switches when the printer head 20 normally works, and when the printer head 20 breaks down and moves to the contact of the limit switches, the limit switches close the second driving mechanism.

Elevating system includes the lead screw 42 of vertical setting, the lead screw nut 43 on the lead screw 42 is established to the cover, a connecting plate that is used for driving lead screw 42 pivoted motor 44 and links to each other with second actuating mechanism, motor 44 and printing frame fixed connection, be equipped with the bar groove along vertical direction on the printing frame, fixedly connected with link 49 on the lead screw nut 43, link 49 passes behind the bar groove with connecting plate fixed connection, the front side bilateral symmetry of printing the frame is equipped with two sliders, be equipped with two slide rails on the connecting plate, slider and slide rail one-to-one, the slider slides and sets up on the slide rail that corresponds, the pot head of lead screw 42 is equipped with primary shaft bearing 45, the pot head of lead screw 42 is equipped with secondary shaft bearing 46, primary shaft bearing 45 and secondary shaft bearing 46 fixed connection are on printing the frame, all be equipped with spacing sensor 48 on primary shaft bearing 45 and the secondary shaft bearing 46, be equipped with the trigger piece 47 corresponding with spacing sensor 48 on the lead screw nut 43. In actual operation, the motor 44 drives the lead screw 42 to move up and down along the lead screw nut 43, and the lead screw 42 drives the print frame to move up and down, so as to realize the lifting of the print head. Specifically, the printing head is lifted according to a preset height, namely the trigger piece 47 moves between the two limit sensors 48, the trigger piece 47 and the limit sensors 48 cannot contact with each other in the printing head which normally works, and when the lifting mechanism breaks down, the trigger piece 47 and the limit sensors 48 contact with each other, and at the moment, the lifting mechanism stops working.

As shown in fig. 16, the ink adding mechanism includes an ink tank 51, an ink supply pump 52 and an ink box 54, the ink tank 51 supplies ink to the ink box 54 through the ink supply pump 52, the ink box 54 is connected to the print head, a first liquid level sensor 55 is disposed in the ink box 54, and the first liquid level sensor 55 is electrically connected to the ink supply pump 52. When the first liquid level sensor 55 senses that the ink in the ink box 54 reaches a low liquid level, a signal is sent to the ink supply pump 52, the ink supply pump 52 pumps the ink in the ink barrel 51 into the ink box 54, when the liquid level of the ink in the ink box 54 is higher and higher until the liquid level reaches a high liquid level, the first liquid level sensor 55 is triggered again, and the first liquid level sensor 55 sends a signal to the ink supply pump 52 to supply the ink to the liquid level pump; when the printing head 41 is used for printing, the ink box 54 is switched to a positive pressure state, and the ink in the ink box 54 enters the printing head from the ink pipe and is then pressed out from the nozzle of the printing head. In the present embodiment, a filter 53 is provided between the ink tank 54 and the ink supply pump 52. By providing the filter 53, clogging of the printing head by ink is reduced.

The ink box 54 is connected with the buffer bottle 57 through a first air pipe, the buffer bottle 57 is connected with a positive pressure control system 59 and a negative pressure control system 60 through a three-way valve 58, wherein the three-way valve 58 comprises a first interface, a second interface and a third interface, the first interface is connected with the buffer bottle 57 through a second air pipe, the second interface is connected with the positive pressure control system 59 through a third air pipe, the third interface is connected with the negative pressure control system 60 through a fourth air pipe, a second liquid level sensor 56 is arranged in the buffer bottle 57, the second liquid level sensor 56 is electrically connected with the ink supply pump 52, the positive pressure control system 59 enables the ink box 54 to be kept at positive pressure through the third air pipe, and the negative pressure control system 60 enables the ink box 54 to be kept at negative pressure through the fourth air pipe; in the positive pressure state, the ink cartridge 54 supplies ink to the print head 41, and in the negative pressure state, the ink cartridge 54 sucks the ink in the ink cartridge 54; by arranging the buffer bottle 57, it is ensured that the ink in the ink cartridge 54 does not flow back to the negative pressure control system 60, specifically, when the ink in the ink cartridge 54 is accumulated too much and flows into the buffer bottle 57 through the first air pipe, the second liquid level sensor 56 in the buffer bottle 57 senses a signal and feeds the signal back to the ink supply pump 52, the ink supply pump 52 stops working, and the positive pressure control system 59 stops providing positive pressure to the buffer bottle 57; finally, the ink accumulated in the buffer bottle 57 is manually discharged to remove the trouble.

As shown in fig. 12 to 15, the feeding mechanism includes a conveying assembly and a material distributing assembly, the conveying assembly includes a material conveying platform 26, a plurality of second conveying belts 27 are equidistantly arranged on the material conveying platform 26 along the left-right direction, the rear ends of the second conveying belts 27 are connected with the front ends of the first conveying belts 3, the material distributing assembly includes guide rods 28 arranged along the left-right direction of the material conveying platform 26, two material distributing plates 29 symmetrically arranged on the guide rods 28 and a driving assembly for driving the two material distributing plates 29 to be relatively close to or away from each other, a material blocking assembly is arranged on the guide rods 28, the material blocking assembly includes material blocking plates 30 and mounting blocks 31, the mounting blocks 31 are arranged on the guide rods 28, the material blocking plates 30 are arranged on the mounting blocks 31 and can slide up and down along the mounting block, the material blocking plates 30 are arranged on the front sides of the mounting blocks 31, an adjusting structure for adjusting the heights of the material blocking plates 30 is arranged on the mounting blocks 31, the lower ends of the material blocking plates 30 are connected with material blocking plates 32, the material blocking plates 32 are arranged in parallel to the surface of the second conveying belts 27, a folded edge 33 bent upwards is arranged on the rear side of the material blocking plates 32, and the front side of the first folding roll 4. In the embodiment, the second conveying belt 27 conveys the stacked plates one by one onto the first conveying belt 3, in the plate conveying process, the two material trimming plates 29 clamp the stacked plates to ensure that the plates are kept orderly in the conveying process, the material blocking plate 30 and the second conveying belt 27 have a gap, the width of the gap is larger than the thickness of a single plate and smaller than the thickness of two plates, one plate is ensured to be output at a time, and the gap distance is changed by setting an adjusting structure to achieve the purpose of conveying the plates with different thicknesses; by arranging the material pressing plate 32, the stability of the plate in transmission is guaranteed; by providing the folded edge 33 bent upward on the front side of the pressure plate 32, the sheet material is conveniently conveyed to the lower side of the pressure plate 32.

Pass material platform 26 and have third cavity 34, the top surface that passes material platform 26 is equipped with a plurality of adsorption zones along left right direction equidistance, adsorption zone and second transmission band 27 one-to-one, adsorption zone is located the below that corresponds second transmission band 27, evenly be equipped with a plurality of second adsorption holes 35 in the adsorption zone, evenly be equipped with a plurality of second perforation 36 on the second transmission band 27, the aperture that second perforation 36 was lighter than second adsorption holes 35, the bottom surface interval that passes the material platform is equipped with a plurality of second inlet scoops, second inlet scoop and second adsorption holes 35 all communicate with third cavity 34, second inlet scoop and second adsorption holes 35 dislocation set, the second inlet scoop is continuous with the second mechanism of induced drafting through third aspiration channel 38. During actual work, the second air suction mechanism sucks air in the third cavity 34, negative pressure is formed in the third cavity 34, and when the second conveying belt 27 moves, the through holes are always communicated with the adsorption holes, so that the plates are tightly adsorbed on the second conveying belt 27; in addition, when the second conveying belt 27 conveys the plate to the first conveying belt 3, the first nip roller 4 is convenient to press the plate; the second suction inlet and the second suction hole 35 are disposed in a staggered manner, so that the third suction pipe 38 is prevented from blocking the second conveyor belt 27. In this embodiment, the place ahead of passing material platform 26 is equipped with holds in the palm system mechanism, hold in the palm paper mechanism and set up the support paper subassembly in frame 1 both sides including the symmetry, hold in the palm the paper subassembly and include the cantilever, the cantilever level sets up and extends towards the place ahead of frame 1, the inboard of cantilever is equipped with the slide rail along the cantilever trend, be equipped with the slider on the slide rail, be equipped with the bearing roller that is used for supporting panel between two sliders, be equipped with the pivot between two cantilevers, the pivot is connected with the swing roller, the relative pivot parallel arrangement of swing roller, the one end of pivot is connected with and is used for driving pivot pivoted guiding mechanism. The automatic feeding of the printing platform 2 is realized by arranging the material conveying platform 26; by arranging the paper supporting mechanism, large-size plates can be conveyed, and the application range of the invention is expanded.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the specification and the drawings of the present invention, which are directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a digital printing machine, includes frame (1), its characterized in that, be equipped with print platform (2) in frame (1), be equipped with first conveyer belt (3) that are used for transmitting panel along the fore-and-aft direction on print platform (2), the top of print platform (2) is equipped with first nip roller (4), second nip roller (5) and third nip roller (6), first nip roller (4), second nip roller (5) and third nip roller (6) set up along print platform (2) interval in proper order after to in the past, the region between second nip roller (5) and third nip roller (6) is print interval (7) of print platform (2), be equipped with the first lifting unit spare that is used for driving first nip roller (4) lift in frame (1), be used for driving the second lifting unit spare that second nip roller (5) goes up and down and be used for driving the third lifting unit spare that third nip roller (6) goes up and down, the top of print interval (7) is equipped with print mechanism, the front end that frame (1) is equipped with the conveyer belt (3) and is used for transporting material to transport mechanism.

2. The digital printing machine according to claim 1, wherein the printing platform (2) has a first cavity (8), the first conveyor belt (3) is uniformly provided with a plurality of first through holes (9), the top surface of the printing platform (2) is uniformly provided with a plurality of bar-shaped grooves (10), the bar-shaped grooves (10) correspond to the first through holes (9), the bottom surface of the bar-shaped grooves (10) is uniformly provided with a plurality of first suction holes (11) communicated with the first cavity (8), the direction of the bar-shaped grooves (10) is consistent with the conveying direction of the first conveyor belt (3), the bottom surface of the printing platform (2) is provided with a plurality of first suction ports (12) communicated with the first cavity (8) side by side, the plurality of first suction ports (12) are arranged at equal intervals, the frame (1) is provided with a first suction mechanism, and the first suction ports (12) are connected with the first suction mechanism through first suction pipes (13).

3. The digital printing machine according to claim 2, wherein a plurality of partition plates (14) are arranged in the first cavity (8) side by side along the left-right direction, the partition plates (14) have uniform spacing, the first cavity (8) is divided into a plurality of independent adsorption cavities by the plurality of partition plates (14), the first air inlets (12) correspond to the independent adsorption cavities one by one, and the first air inlets (12) are communicated with the corresponding independent adsorption cavities.

4. The digital printing machine according to claim 2 or 3, wherein a transfer beam (15) is arranged on the frame (1), the transfer beam (15) has a second cavity (16), a plurality of through holes (17) communicated with the second cavity (16) are arranged on the transfer beam (15), the through holes (17) are symmetrically arranged at the left end and the right end of the transfer beam (15), the through holes (17) are in one-to-one correspondence with the first air suction ports (12), the through holes (17) are in sealing connection with the corresponding first air suction ports (12) through first air suction pipes (13), the first air suction mechanisms are communicated with the second cavity (16) through second air suction pipes (37), and the second air suction pipes are arranged in the middle of the transfer beam (15).

5. A digital printer according to claim 2 or 3, wherein the first suction ducts (13) are provided with valves (18).

6. The digital printing machine according to claim 1, 2 or 3, wherein the printing mechanism comprises a cross beam (19), a printing head (20) arranged on the cross beam (19), a first driving mechanism for driving the printing head (20) to move back and forth along the cross beam (19), and a first lifting mechanism for driving the printing head (20) to lift, the cross beam (19) is arranged along the left and right directions of the frame (1), the printing head (20) is connected with an ink adding mechanism, a nozzle of the printing head (20) faces the printing section (7) and is positioned right above the printing section (7), a moisturizing mechanism for moisturizing the nozzle is arranged on one side of the frame (1), the moisturizing mechanism is positioned below the cross beam (19), and an incoming material sensor (21) is arranged at the bottom of the cross beam (19).

7. The digital printing machine according to claim 6, wherein the moisturizing mechanism comprises a bottom plate (22), a moisturizing disc (23) is arranged on the bottom plate (22), a plurality of ink absorbing stacks (24) are arranged in the moisturizing disc (23), moisturizing liquid is arranged in the ink absorbing stacks (24), a second driving mechanism for driving the moisturizing disc (23) to move along the front and back directions of the bottom plate (22) is arranged on the bottom plate (22), an ink scraping sheet (25) is arranged at the rear end of the moisturizing disc (23), the ink scraping sheet (25) is positioned right behind the ink absorbing stacks (24), and the top end of the ink scraping sheet (25) is higher than the top surface of the ink absorbing stacks (24).

8. The digital printing machine according to claim 1, 2 or 3, wherein the feeding mechanism comprises a conveying assembly and a material collecting assembly, the conveying assembly comprises a material conveying platform (26), a plurality of second conveying belts (27) are equidistantly arranged on the material conveying platform (26) along the left-right direction, the rear ends of the second conveying belts (27) are connected with the front end of the first conveying belt (3), the material collecting assembly comprises guide rods (28) arranged along the left-right direction of the material conveying platform (26), two material collecting plates (29) symmetrically arranged on the guide rods (28) and a driving assembly for driving the two material collecting plates (29) to be relatively close to or away from each other, material blocking assemblies are arranged on the guide rods (28) and comprise material blocking plates (30) and mounting blocks (31), the mounting blocks (31) are arranged on the guide rods (28), the material blocking plates (30) are arranged on the mounting blocks (31) and can slide up and down along the mounting blocks (31), the material blocking plates (30) are positioned on the front sides of the mounting blocks (31), and the mounting blocks (31) are used for adjusting the height of the mounting blocks (30).

9. The digital printing machine according to claim 8, wherein a material pressing plate (32) is connected to the lower end of the material blocking plate (30), the material pressing plate (32) is arranged in parallel relative to the belt surface of the second conveying belt (27), a folding edge (33) which is bent upwards is arranged on the rear side of the material pressing plate (32), and the folding edge (33) is positioned in front of the first material pressing roller (4).

10. The digital printing machine according to claim 8, wherein the material conveying platform (26) has a third cavity (34), the top surface of the material conveying platform (26) is provided with a plurality of adsorption regions along the left-right direction at equal intervals, the adsorption regions correspond to the second conveyor belts (27) one by one, the adsorption regions are located below the corresponding second conveyor belts (27), a plurality of second adsorption holes (35) are uniformly arranged in the adsorption regions, a plurality of second through holes (36) are uniformly arranged on the second conveyor belts (27), the aperture of the second through holes (36) is smaller than that of the second adsorption holes (35), a plurality of second air suction ports are arranged at intervals on the bottom surface of the material conveying platform, the second air suction ports and the second adsorption holes (35) are both communicated with the third cavity (34), the second air suction ports and the second adsorption holes (35) are arranged in a staggered manner, and the second air suction ports are connected with the second air suction mechanism through the third air suction pipes (38).