CN112810314A

CN112810314A - High-speed wide-width full-color water-based ink-jet printing mechanism for reel substrate

Info

Publication number: CN112810314A
Application number: CN202110175649.7A
Authority: CN
Inventors: 孙清涛; 王吉晖
Original assignee: Weifang Caihong Digital Technology Co ltd
Current assignee: Weifang Caihong Digital Technology Co ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2021-05-18

Abstract

The invention belongs to the technical field of printing equipment, and particularly relates to a high-speed wide-width full-color water-based ink-jet printing mechanism for a reel substrate. The high-speed broad-width full-color water-based ink-jet printing mechanism of the winding drum substrate provided by the embodiment adopts the jet printing roller to convey the substrate, the stability is improved, the width of the substrate can exceed 1 meter, the conveying speed of the substrate is high, and exceeds 100 meters per minute, a cooling structure is arranged in the jet printing roller, the substrate is matched with a drying device for use, the temperature constancy of the substrate on the surface of the jet printing roller and the temperature constancy of the substrate are kept, the elongation of the substrate is stable, and the color four-color or multi-color non-deviation registration based on.

Description

High-speed wide-width full-color water-based ink-jet printing mechanism for reel substrate

Technical Field

The invention belongs to the technical field of printing equipment, and particularly relates to a high-speed wide-width full-color water-based ink-jet printing mechanism for a reel substrate.

Background

In the printing and packaging industry, a plurality of printing modes exist, including flexo printing, gravure printing, offset printing, digital printing and the like, wherein digital printing is a new printing mode in recent years, and has the characteristics of high efficiency, low small batch cost, simple operation and the like, so that the development trend in recent years is reached.

At present, in the high-speed ink-jet digital printing technology, two ink materials of UV and water are generally used, but the UV ink has strong pollution, and the water-based ink has good environmental protection, so that the water-based ink is accepted by more and more people.

In the watermark ink-jet industry, the substrate traction conveying is a horizontal mode, a belt structure is generally adopted, the mode can be realized for black-white printing, but for color equipment, because the path is long, the substrate is easy to swing in the conveying process, and the registration of four Colors (CMYK) cannot be realized. Especially for wide-width equipment under the condition of high-speed movement, the stability of the movement of the base material directly influences the jet printing effect.

Disclosure of Invention

The invention aims to provide a high-speed wide-width full-color water-based ink-jet printing mechanism for a roll base material.

In order to achieve the technical purpose, the technical scheme of the invention is as follows:

the utility model provides a full-color waterborne ink jet printing mechanism of high-speed broad width of reel substrate, includes the frame, rotate in the frame and install and spout the seal cylinder, lie in the frame the top of spouting the seal cylinder is equipped with spouts the seal subassembly, be equipped with drying device in the frame.

As an improvement, the spray printing roller is provided with a cooling structure.

As an improvement, the spray printing roller comprises a roller body, the cooling structure comprises a cooling channel arranged on the roller body, the extending direction of the cooling channel is parallel to the axial direction of the roller body, the cooling channel comprises a plurality of groups of medium inlet cooling channels and medium return cooling channels which are arranged at intervals, each group of adjacent medium inlet cooling channels and medium return cooling channels are communicated, end covers are arranged at two ends of the roller body, the end covers are provided with medium inlet and return structures, a central shaft is fixedly arranged at the centers of the two end covers in a penetrating manner, the central shaft is provided with a medium inlet and outlet channel, the medium inlet and return structures are connected with the medium inlet and outlet channels and the cooling channels, and one end of the central shaft provided with the medium inlet and outlet channel is connected with.

As a further improvement, the medium feeding and returning structure comprises a medium feeding groove and a medium returning groove which are arranged on one end cover, one surface of the end cover provided with the medium feeding groove and the medium returning groove is connected with the pressing plate, the other end cover is provided with a reversing groove, the medium feeding groove is connected with a medium feeding cooling channel, the medium returning groove is connected with a medium returning cooling channel, and the reversing groove is connected with a group of the medium feeding cooling channel and the medium returning cooling channel;

the medium inlet and outlet channel comprises a medium inlet channel and a medium outlet channel which are coaxially arranged, the medium inlet channel is connected with the medium inlet groove, and the medium outlet channel is connected with the medium return groove through a medium return pipe.

As a further improvement, the drying device comprises a first drying oven and a second drying oven, the second drying oven is arranged close to the printing substrate, the first drying oven comprises a shell, a cavity is arranged in the shell, an air inlet and an air outlet are arranged on the shell, one side edge of the shell close to the spray printing roller is arc-shaped, and one side of the shell close to the spray printing roller is provided with an air guide structure.

As a further improvement, a partition board is arranged in the cavity of the shell, the partition board divides the cavity into a positive pressure cavity and a negative pressure cavity, the air inlet is connected with the positive pressure cavity, and the air outlet is connected with the negative pressure cavity.

As a further improvement, wind-guiding structure includes that a plurality of settings are in the wind-guiding strip at the arc edge of casing, the wind-guiding strip is the rectangular of cross section for the V-arrangement, rectangular V word point is kept away from spout the seal cylinder setting, and is adjacent form the air-out clearance between the wind-guiding strip.

As a further improvement, a slide rail is arranged on the rack, a slide way is arranged on the shell, the slide rail is matched with the slide way, and a cylinder is arranged between the rack and the shell.

As a further improvement, spout the seal subassembly including spouting the seal support, spout the seal support and pass through the vertical slidable mounting of vertical lead screw module and be in the frame, spout the printing shower nozzle that is equipped with the arc arrangement in rows setting on the seal support, lie in the frame the below of printing the shower nozzle is equipped with the support of moisturizing, the support of moisturizing is installed through horizontal lead screw module in the frame, be equipped with on the support of moisturizing a plurality of with the sealed frame of moisturizing that the printing shower nozzle position corresponds, it is equipped with on the support of moisturizing to slide and scrapes the china ink pole, it is equipped with the doctor-bar on the china ink pole to scrape, the position of doctor-bar corresponds with the position of the printing shower nozzle of.

As a further improvement, the spray printing support is provided with a printing nozzle mounting strip, the printing nozzles are mounted on the printing nozzle mounting strip, each row of printing nozzles are mounted on two printing nozzle mounting strips arranged in parallel, and the positions of the printing nozzles on the two printing nozzle mounting strips correspond to each other.

As a further improvement, the printing nozzle is provided with an ink inlet and an ink outlet, the ink inlet is connected with a main ink box, the ink outlet is connected with a backflow ink box, and the main ink box and the backflow ink box are respectively connected with a negative pressure device.

Due to the adoption of the technical scheme, the invention has the beneficial effects that:

the invention provides a high-speed wide-width full-color water-based ink-jet printing mechanism for a reel substrate, which is characterized in that the substrate is wrapped on a jet printing roller in a substrate conveying process, the substrate is pressed on the jet printing roller through a compression roller, the substrate and the jet printing roller rotate together, the substrate does not swing left and right or jump up and down in the substrate conveying process, so that the stability of the substrate conveying process is achieved, the jet printing effect is improved, during printing, a jet printing assembly carries out ink-jet printing on the substrate wound on the jet printing roller, and when the printed substrate rotates to a drying device along with the jet printing roller, the printed substrate is dried, so that jet printing ink on the substrate is dried.

Drying device includes first oven and second oven, first oven is close to and spouts the seal cylinder and set up drying device, the second oven is close to and prints the substrate setting, the substrate after accomplishing the printing is dried, make the ink drying on it, concretely, first oven and second oven can the exclusive use, also can cooperate the use, first oven can slide adjusting position, high durability and convenient use, drying device's air intake gets into hot-blastly, hot-blastly blow to the printing substrate on, then discharge through the air outlet, dry the printing substrate, make the ink drying on the substrate.

Because stoving and equipment operation can make the change that spouts seal cylinder and last printing substrate temperature rise, the temperature rise can arouse the change of printing substrate elongation, influences the printing quality, consequently sets up cooling structure at the spout seal cylinder, cools off the spout seal cylinder, with drying device cooperation, makes the spout seal cylinder and the printing substrate above that keep the constant temperature, and the index such as the elongation that makes the printing substrate is stable, guarantees the printing accuracy nature.

Spout the upper and lower position control that the seal subassembly can realize printing the shower nozzle, during the printing, downwards adjust and print the shower nozzle position and make it be close to the printing substrate, it becomes the arc range to print the shower nozzle, it is corresponding with the shape of substrate on the spray printing cylinder, print to adjust upward after accomplishing and print the shower nozzle position, will moisturize the support through horizontal lead screw module and remove to and print the shower nozzle and correspond the position, the doctor-bar removes and will print on the shower nozzle and remain the ink and scrape off on the ink bar is scraped in the control, then downwards move and print the shower nozzle, make and print shower nozzle and the sealed frame that moisturize combine closely, it is in the confined space in the sealed frame that moisturizes to print the shower.

Every row of printing shower nozzle is installed side by side on two spouts printer head mounting bars, adopts the mode of printing the shower nozzle double-pin for when a printing shower nozzle is blocked up or damaged, can print with another printing shower nozzle of installing side by side, two of installing side by side in the in-service use print the probability that the shower nozzle damaged simultaneously extremely low, improve the stability of printing, be convenient for in time will break down the maintenance is dismantled to the printing shower nozzle.

The ink inlet of the printing nozzle is connected with the main ink box, the ink outlet is connected with the backflow ink box, the main ink box and the backflow ink box are respectively connected with the negative pressure device, a double negative pressure mode is adopted, the ink is normally circulated by controlling the pressure difference, meanwhile, the ink in the printing nozzle is guaranteed not to drip, bubbles and impurities generated in the printing process are guaranteed to be taken away in time, and the stability of ink supply and ink is guaranteed.

Drawings

FIG. 1 is a state diagram of the actual use of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

FIG. 3 is a schematic view of the construction of an inkjet printing cylinder;

FIG. 4 is a schematic end view of the media access end cap;

FIG. 5 is a schematic cross-sectional view of an end cap for media access

FIG. 6 is a schematic structural view of a reversing end cap;

FIG. 7 is a schematic view of the construction of a reversing slot;

FIG. 8 is a schematic view of the cartridge media access end;

FIG. 9 is a schematic structural view of a reversing end of the barrel;

fig. 10 is a schematic structural view of the drying apparatus;

FIG. 11 is a schematic view of a matching structure of a drying device and a spray printing roller;

FIG. 12 is a schematic structural view of an inkjet printing assembly;

FIG. 13 is a schematic layout of print heads;

FIG. 14 is a schematic diagram of the ink supply system of the print head;

in the attached drawings, 1-a rack, 2-a spray printing roller, 215-a barrel, 21-a medium inlet cooling channel, 22-a medium return cooling channel, 23-a central shaft, 24-a medium inlet and return end cover, 25-a reversing end cover, 26-a medium inlet groove, 27-a medium return groove, 28-a pressing plate, 29-a reversing groove, 210-a medium inlet channel, 211-a medium outlet channel, 212-a rotary joint, 213-a reinforcing sleeve, 214-a reinforcing rib plate, 216-a medium return pipe, 3-a pressing roller, 4-a spray printing component, 41-a spray printing bracket, 42-a vertical lead screw module, 43-a printing nozzle, 44-a moisturizing bracket, 45-a transverse lead screw module, 46-a moisturizing sealing frame, 47-a scraping ink rod and 48-a scraping blade, 49-printing nozzle mounting strip, 410-main ink box, 411-backflow ink box, 412-main ink barrel, 413-main negative pressure bottle, 414-negative pressure pump, 415-positive pressure pump, 416-backflow pump, 417-backflow negative pressure bottle, 418-control panel, 5-drying device, 51-first oven, 52-air inlet, 53-air outlet, 54-partition plate, 55-positive pressure cavity, 56-negative pressure cavity, 57-air guide strip, 58-slide rail, 59-slide rail, 510-air cylinder, 511-second oven, 6-front traction mechanism and 7-rear traction mechanism.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

As shown in fig. 1 to 14, a full-color water-based inkjet printing mechanism with high speed and wide width for a roll substrate comprises a frame 1, a jet printing roller 2 is rotatably mounted on the frame 1, in specific use, the jet printing roller is matched with a pressure roller 3 to press the print substrate against the jet printing roller, so as to improve the use effect, a jet printing assembly 4 is arranged on the frame 1 above the jet printing roller 2, a drying device 5 is arranged on the frame 1, the jet printing roller is provided with a cooling structure, in actual use, a front traction mechanism 6 is arranged in front of the jet printing roller 2, a rear traction mechanism 7 is arranged behind the jet printing roller to respectively provide traction power for the substrate, specifically, the front traction mechanism and the rear traction mechanism comprise a pressure roller and a driving roller driven by a motor, and a power mechanism is arranged on the jet printing roller, for example, the motor is connected, so that when the jet printing roller runs, the driving roller of the front traction mechanism and, the jet printing roller is provided with power, so that the traction force required by the movement of the base material can be reduced, the traction force on the base material is reduced, the elongation of the base material is reduced, and the over-stretching of the base material and even the tearing of the base material are avoided.

In the use, twine the substrate on spouting seal cylinder 2 and carry out the substrate and carry, press the substrate on spouting seal cylinder through compression roller 3, the substrate rotates with spouting seal cylinder together, there is not swing about the substrate and the beat from top to bottom in the substrate transportation process to reach substrate transportation process's stability, be favorable to improving and spout the seal effect, be particularly useful for broad width printing, the substrate width exceeds 1 meter, substrate transport speed can reach more than 100 meters/minute, still can guarantee the stable transport of substrate. The substrate conveying stability is high, the printing precision and the quality are both guaranteed, full-color inkjet printing based on water-based ink can be realized, color four-color or multi-color deviation-free registration is realized, and the traditional substrate conveying mode cannot be guaranteed at all.

In actual use, in order to match with the base material to have good tension control in the base material conveying process, a tension controller is respectively added on the advancing base material part and the backward base material part of the jet printing roller to adjust the tension of the base material.

In this embodiment, the concrete structure of the cooling structure of jet printing cylinder is as follows, jet printing cylinder 2 includes barrel 215, the barrel is equipped with cooling channel, cooling channel's extending direction is parallel with the axial of barrel, cooling channel includes the medium cooling channel 21 of advancing that a plurality of groups interval set up and returns medium cooling channel 22, every adjacent medium cooling channel of advancing of group is linked together with returning medium cooling channel, the both ends of barrel are equipped with the end cover, the end cover is equipped with into and returns the medium structure, the center pin 23 is worn to be equipped with in the center of both ends cover is fixed, the center pin is equipped with business turn over medium passageway, it connects business turn over medium passageway and cooling channel to advance back the medium.

Specifically, one end cover is a medium inlet and return end cover 24, the other end cover is a reversing end cover 25, the medium inlet and return structure comprises a medium inlet groove 26 and a medium return groove 27 which are arranged on the medium inlet and return end cover, one side of the medium inlet and return end cover 24, which is provided with the medium inlet groove and the medium return groove, is connected with a pressure plate 28, the reversing end cover is provided with a reversing groove 29, the medium inlet groove is connected with a medium inlet cooling channel, the medium return groove is connected with a medium return cooling channel, and the reversing groove is connected with a group of medium inlet cooling channel and medium return cooling channel;

the medium inlet and outlet channel comprises a medium inlet channel 210 and a medium outlet channel 211 which are coaxially arranged, the medium inlet channel is connected with the medium inlet groove, the medium outlet channel is connected with the medium return groove through a medium return pipe 216, specifically, one end of the central shaft is provided with a blind hole, a sleeve is arranged in the blind hole, the medium inlet channel is arranged between the sleeve and the central shaft, and the medium outlet channel is arranged in the sleeve.

Specifically, the medium inlet grooves extend along the radial direction of the end cover, the positions of the medium inlet grooves extending to be close to the peripheral surface of the end cover are bent and extend in parallel with the axial direction of the end cover, a plurality of medium inlet grooves are arranged, the medium returning grooves are uniformly distributed along the circumferential direction of the end cover, are positioned on the circumferential surface of the end cover and extend along the circumferential direction of the end cover, the groove wall of the medium returning groove is lower than the groove wall of the medium inlet groove, correspondingly, the medium inlet end of the medium inlet cooling channel is longer than the medium outlet end of the medium returning cooling channel, so that when the medium inlet and outlet end cover is connected with the cylinder body, the medium inlet groove is connected with the medium inlet cooling channel, the medium return groove is connected with the medium outlet cooling channel, the central shaft is provided with a through hole communicated with the medium inlet groove and the medium inlet channel, the bottom of the groove at one end of the medium inlet groove connecting through hole is provided with a chamfer structure, the position of the through hole corresponds to that of the chamfer structure, and when the medium is favorably fed, the cooling medium is filled in the chamfer structure position of the medium inlet groove close to the central shaft.

When the rotary joint is used specifically in this embodiment, the central shaft is connected to the rotary joint 212, and the cooling medium flows into the medium inlet channel of the medium inlet/outlet end cover through the medium inlet channel of the central shaft, then flows into the medium inlet cooling channel of the cylinder, is reversed by the reversing channel of the wire changing end cover, flows into the medium outlet cooling channel of the cylinder, then flows into the medium outlet channel of the central shaft, and finally flows out through the medium outlet channel of the central shaft.

In this embodiment, in order to ensure the structural strength of the inkjet printing drum, the reinforcing ribs are disposed between the central shaft and the end cover, the reinforcing ribs include a reinforcing sleeve 213 fixedly sleeved on the central shaft, the reinforcing rib plate 214 is connected around the reinforcing sleeve, and the reinforcing rib plate is radially distributed around the reinforcing sleeve.

In the assembly process, the central shaft and the end cover are in an interference fit hot charging connection mode, damage to the central shaft caused by welding and the like is avoided, stress deformation is avoided, the end cover and the barrel are connected in an external welding mode, the end cover and the pressing plate are also in an external welding connection mode, sufficient connection strength is guaranteed, the strength influence on the end cover, the pressing plate and the barrel is small, and a welding line cannot contact with a cooling medium.

In this embodiment, the barrel is seamless steel pipe integral type, does not have inside and outside double-layered cover, and advance medium cooling channel and return medium cooling channel for the long straight through-hole that sets up on the barrel pipe wall, along the circumference evenly distributed of barrel, two adjacent long straight through-holes are a set of, are advancing the medium and return the medium respectively, and cooling medium flows into from the end of advancing the medium of barrel and flows back again after the switching-over end cover trades, produces great difference in temperature when avoiding flowing into from one side and flowing out from the opposite side. Moreover, this embodiment cooling channel is the straight hole, compares with the jacket structure cylinder that current industry often used, and the flow is short, and the cycle rate has been accelerated greatly to the cycle length, makes temperature control response faster, more accurate. In addition, the original jacket welding mode is replaced by a long hole mode, the structure is simple, and rusting is not easy to happen.

In this embodiment, be close to on the frame and spout seal cylinder lower part and be equipped with drying device 5, dry the substrate after the printing, drying device includes first oven 51 and second oven 511, the second oven is close to the setting of printing substrate, first oven includes the casing, be equipped with the cavity in the casing, be equipped with air intake 52 and air outlet 53 on the casing, one side edge that the casing is close to spouting the seal cylinder is the arc, corresponds with the shape image of spouting the seal cylinder, the casing is close to the one side of spouting the seal cylinder and is equipped with wind-guiding structure.

Specifically, be equipped with baffle 54 in the cavity of casing, the wind-guiding structure is connected to the baffle, the baffle divides into two parts with the cavity, air intake and air outlet pass through the fan intercommunication during the use, the part of being connected with the air intake in the cavity is positive pressure chamber 55, the part of being connected with the air outlet is negative pressure chamber 56, during the in-service use, hot-blast entering positive pressure chamber from the air intake blows to the substrate through the wind-guiding structure, under the pressure differential effect, get into negative pressure chamber, flow from the air outlet, through fan circulation use, energy saving, pressure differential effect island wind, make hot-blast laminating substrate surface flow, be different from the dry straight blow mode of tradition, drying efficiency is.

In this embodiment, the structure of the second oven is not specifically limited, and an existing oven structure on the market may be adopted, and the first oven and the second oven may be used separately or in combination, and may be determined according to factors such as the use environment, the drying capability of the ink, and the printing speed.

In this embodiment, wind-guiding structure includes a plurality of wind-guiding strips 57 that set up at the arc edge of casing, and wind-guiding strip is the rectangular of cross section for the V-arrangement, and rectangular V word point is kept away from the setting of jet printing cylinder, forms the air-out clearance between the adjacent wind-guiding strip, makes hot-blast vertical blowing to the substrate uniformly, and wind-guiding strip still plays the effect of strengthening shell structure intensity.

In this embodiment, be equipped with slide rail 58 in the frame, be equipped with slide 59 on the casing, the slide rail cooperatees with the slide, be equipped with cylinder 510 between frame and the casing, be convenient for adjust the casing and spout the distance between the base material on the seal cylinder, guarantee the stoving effect and avoid too closely and dry excessively from the base material again, be convenient for wear to draw the base material and spout the maintenance of seal cylinder in addition, during operating condition, adjust the casing and be close to and spout the seal cylinder, during non-operating condition, make the casing keep away from and spout the seal cylinder.

In actual use, the direction of hot air flowing from the positive pressure cavity to the negative pressure cavity is opposite to the rotation direction of the jet printing roller, the relative speed of the hot air and the base material is increased, and the drying effect is improved.

In this embodiment, the inkjet printing assembly 4 includes an inkjet printing support 41, the inkjet printing support is vertically slidably mounted on the frame 1 through a vertical lead screw module 42, the inkjet printing support is provided with printing nozzles 43 arranged in rows in an arc shape, the printing nozzles correspond to the shapes of the substrates on the inkjet printing drum, a moisturizing support 44 is arranged below the printing nozzles on the frame, the moisturizing support is mounted on the frame through a horizontal lead screw module 45, the moisturizing support is provided with a plurality of moisturizing sealing frames 46 corresponding to the positions of the printing nozzles, the top end of each moisturizing sealing frame is open, the other surfaces of the moisturizing sealing frame are closed, an ink scraping rod 47 is slidably arranged on the moisturizing support, a belt and a motor can be specifically arranged on the moisturizing support, the belt is provided with an ink scraping rod, the motor operates to drive the belt to move, the belt drives the ink scraping rod to move, the ink scraping rod is provided with scraping blades 48, and the positions, the bottom of support of moisturizing seals and forms the ink storage tank, can deposit the ink of scraping, during printing, adjust downwards through vertical lead screw module and print the shower nozzle position and make it be close to the printing substrate, print, upwards adjust the printing shower nozzle position after printing the completion, will moisturize the support through horizontal lead screw module and remove and correspond the position with printing the shower nozzle, adjust and print the shower nozzle position, the control is scraped the china ink pole and is removed, it will print on the shower nozzle to drive the doctor-bar removal and remain ink and foul and scrape, then scrape the china ink pole return, move down and print the shower nozzle, make and print shower nozzle and moisturizing seal frame and combine closely, it is in the confined space in the seal frame to print the shower nozzle, it can not dry to print the shower nozzle, do benefit.

In this embodiment, be equipped with on the seal support and print shower nozzle mounting bar 49, it installs on printing the shower nozzle mounting bar to print the shower nozzle, every row of printing shower nozzle is installed on two printing shower nozzle mounting bars that set up side by side, the position of the shower nozzle of printing on two printing shower nozzle mounting bars is corresponding, adopt the mode of printing the double pin of shower nozzle, make when one printing shower nozzle is stifled or when damaging, can print with another printing shower nozzle of installing side by side, two probability that print the shower nozzle damage simultaneously of installing side by side in the in-service use is extremely low, greatly improve the stability of printing, be convenient for in time will break down the maintenance of printing the shower nozzle.

In this embodiment, the inkjet printing assembly adopts dual negative pressure circulation ink supply, and the specific structure is as shown in fig. 14, the printing nozzle is provided with a nozzle, an ink inlet and an ink outlet, the ink inlet is connected with a main ink cartridge 410 through an ink inlet pipe, the ink inlet pipe is provided with a filter, the ink outlet is connected with a return ink cartridge 411 through an ink return pipe, the main ink cartridge and the return ink cartridge are respectively connected with a negative pressure device, specifically, the ink inlet of the main ink cartridge is connected with a main ink tank 412 through a connecting pipeline, the connecting pipeline is provided with an ink supply pump, a filter and a degassing device, the air inlet of the main ink cartridge is connected with one inlet of a three-way valve, one outlet of the three-way valve is connected with a main negative pressure bottle 413, the main negative pressure bottle is connected; the ink outlet of the backflow ink box 411 is connected with a backflow pump 416, the backflow pump is connected with a main ink barrel 412, the vent of the backflow ink box is connected with a backflow negative pressure bottle 417, the backflow negative pressure bottle is connected with a negative pressure pump 414 through a valve, the air pressure of a negative pressure system is controlled by controlling the states of the pump and the valve through a control panel 418, the main negative pressure bottle generates negative pressure for the main ink box, the backflow negative pressure bottle generates negative pressure for the backflow ink box, the main ink box adopts low negative pressure, the backflow ink box adopts high negative pressure to generate negative pressure difference, the ink is ensured to return to the backflow ink box from the main ink box through a printing nozzle, the ink of the backflow ink box returns to the main ink barrel, the main ink barrel returns to the main ink box through an ink supply pump, the normal circulation of the ink is realized by adopting a double negative pressure mode, meanwhile, the ink in-time dripping of the ink in the printing nozzle is ensured, the stability of ink supply and ink is ensured.

This embodiment is in the specific use, it carries to print the substrate winding on spouting the seal cylinder, when needs are printed, spout that the seal subassembly falls suitable position and prints, the substrate after printing rotates the drying device position along with spouting the seal cylinder, drying device blowout is hot-blast to spouting the seal substrate and dry, it is dry to make the ink on the substrate, can get into the subsequent handling, the substrate is carried and the stoving in-process, it can heat up to spout seal cylinder and substrate, this embodiment sets up cooling structure in spouting the seal cylinder and cools down to spouting seal cylinder and substrate, the operating temperature who makes spout seal cylinder and substrate is invariable, avoid the concertina rate that temperature variation influences the substrate and influence the printing quality.

The high-speed broad-width full-color water-based ink-jet printing mechanism of the reel substrate provided by the embodiment adopts the jet printing roller substrate to be conveyed, the stability of substrate conveying is improved, the width of the substrate can exceed 1 meter, the conveying speed of the substrate is high, exceed 100 meters per minute, the jet printing roller is internally provided with a cooling structure, the substrate is matched with a drying device for use, the temperature of the substrate on the surface of the jet printing roller and the temperature of the substrate are kept constant, the elongation of the substrate is stable, and the color four-color or multi-color non-deviation registration based on water-based.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a full-color aqueous inkjet printing mechanism of high-speed broad width of reel substrate, a serial communication port, which comprises a frame, rotate in the frame and install and spout the seal cylinder, be located in the frame the top of spouting the seal cylinder is equipped with spouts the seal subassembly, be equipped with drying device in the frame.

2. The high-speed wide-width full-color aqueous inkjet printing mechanism according to claim 1, wherein the inkjet printing cylinder is provided with a cooling structure.

3. The high-speed wide-width full-color water-based ink-jet printing mechanism of claim 2, wherein the ink-jet printing roller comprises a roller body, the cooling structure comprises a cooling channel arranged on the roller body, the extending direction of the cooling channel is parallel to the axial direction of the roller body, the cooling channel comprises a plurality of groups of medium inlet cooling channels and medium return cooling channels which are arranged at intervals, each group of adjacent medium inlet cooling channels and medium return cooling channels are communicated, end covers are arranged at two ends of the roller body, the end covers are provided with medium inlet and return structures, a central shaft is fixedly arranged at the centers of the two end covers in a penetrating manner, the central shaft is provided with a medium inlet and outlet channel, the medium inlet and outlet channel and the cooling channel are connected through the medium inlet and outlet structure, and one end of the medium inlet and outlet channel is connected with a.

4. The high-speed wide-width full-color aqueous inkjet printing mechanism according to claim 3, wherein the medium feeding and returning structure comprises a medium feeding groove and a medium returning groove which are arranged on one end cover, one side of the end cover provided with the medium feeding groove and the medium returning groove is connected with a pressing plate, the other end cover is provided with a reversing groove, the medium feeding groove is connected with a medium feeding cooling channel, the medium returning groove is connected with a medium returning cooling channel, and the reversing groove is connected with a group of the medium feeding cooling channel and the medium returning cooling channel;

5. The high-speed wide-width full-color water-based ink-jet printing mechanism for the roll substrate according to claim 1, wherein the drying device comprises a first oven and a second oven, the second oven is arranged close to the printing substrate, the first oven comprises a housing, a cavity is arranged in the housing, an air inlet and an air outlet are arranged on the housing, one side edge of the housing close to the jet printing roller is arc-shaped, and one side of the housing close to the jet printing roller is provided with an air guide structure.

6. The high-speed wide-width full-color water-based ink-jet printing mechanism of claim 5, wherein a partition board is arranged in the cavity of the housing, the partition board divides the cavity into a positive pressure cavity and a negative pressure cavity, the air inlet is connected with the positive pressure cavity, and the air outlet is connected with the negative pressure cavity.

7. The high-speed wide-width full-color water-based ink-jet printing mechanism of claim 5, wherein the air guide structure comprises a plurality of air guide strips arranged on the arc-shaped edge of the housing, the air guide strips are long strips with V-shaped cross sections, the tips of the long V-shaped strips are far away from the jet printing roller, and an air outlet gap is formed between every two adjacent air guide strips.

8. The high-speed wide-width full-color water-based ink-jet printing mechanism of claim 1, wherein the ink-jet printing assembly comprises an ink-jet printing support, the ink-jet printing support is vertically slidably mounted on the frame through a vertical screw module, the ink-jet printing support is provided with printing nozzles arranged in rows in an arc shape, the frame is provided with a moisturizing support below the printing nozzles, the moisturizing support is mounted on the frame through a transverse screw module, the moisturizing support is provided with a plurality of moisturizing sealing frames corresponding to the positions of the printing nozzles, the moisturizing support is provided with an ink scraping rod in a sliding manner, the ink scraping rod is provided with scraping blades, and the positions of the scraping blades correspond to the positions of the printing nozzles arranged in rows.

9. The high-speed wide-width full-color aqueous inkjet printing mechanism according to claim 8, wherein a printing nozzle mounting bar is arranged on the inkjet printing support, the printing nozzles are mounted on the printing nozzle mounting bar, each row of printing nozzles are mounted on two printing nozzle mounting bars arranged in parallel, and the positions of the printing nozzles on the two printing nozzle mounting bars correspond to each other.

10. The high-speed wide-width full-color aqueous inkjet printing mechanism according to claim 8, wherein the printing nozzle is provided with an ink inlet and an ink outlet, the ink inlet is connected with the main ink cartridge, the ink outlet is connected with the return ink cartridge, and the main ink cartridge and the return ink cartridge are respectively connected with a negative pressure device.