CN111137014A

CN111137014A - Digital printing machine with ink solidification prevention mechanism

Info

Publication number: CN111137014A
Application number: CN202010097817.0A
Authority: CN
Inventors: 张立群; 王堃
Original assignee: Fang Yi Fuzhou Digital Printing Co Ltd
Current assignee: Fang Yi Fuzhou Digital Printing Co Ltd
Priority date: 2020-02-18
Filing date: 2020-02-18
Publication date: 2020-05-12
Anticipated expiration: 2040-02-18
Also published as: CN111137014B

Abstract

The invention discloses a digital printing machine with an ink solidification prevention mechanism, which comprises a protection mechanism and a printing mechanism, wherein the printing mechanism is arranged in the protection mechanism, the digital printing machine also comprises an ink jet mechanism for providing ink, a scraping mechanism for preventing ink from solidifying and a cleaning mechanism for collecting waste ink, the ink jet mechanism is arranged at the upper end of the printing mechanism, the ink jet mechanism is connected with the scraping mechanism, the printing mechanism is provided with the cleaning mechanism, and the power end of the printing mechanism is connected with a power mechanism. According to the invention, the ink-jet mechanism and the scraping mechanism are matched, so that a large amount of ink can be poured back when printing is stopped, materials are saved, meanwhile, the scraping mechanism and the power mechanism are matched to quickly clean the involved ink, the influence of a nozzle blockage on next printing is avoided, waste ink can be scraped and collected by the cleaning mechanism, the need of worrying about cleaning in the later period is avoided, and the practicability is improved.

Description

Digital printing machine with ink solidification prevention mechanism

Technical Field

The invention relates to the field of digital printing machines, in particular to a digital printing machine with an ink solidification prevention mechanism.

Background

The digital printing is to directly record the digital image-text information on a printing material for printing. That is, a digital stream of teletext information is input and a digital stream of teletext information is output.

In the field of printing machines, a large amount of printed matters need to be printed, the ink supply pipeline is changed into a large-diameter pipeline correspondingly due to pressure, however, after the printing machine is stopped, a large amount of ink remains in the pipeline due to the large caliber of the pipeline, if the external temperature is too low, the ink is involved in the ink to be cured in a short time, the condition of nozzle blockage can also occur, and the waste of the ink and the trouble of cleaning when the ink is reused in a later period are caused.

Disclosure of Invention

The present invention has been made to solve the above problems, and an object of the present invention is to provide a digital printer having an ink solidification prevention mechanism.

The invention realizes the purpose through the following technical scheme:

digital printing machine with prevent ink solidification mechanism, including protection mechanism, printing mechanism, protection mechanism internally mounted have printing mechanism, still including the ink jet mechanism that is used for providing the ink and prevent ink solidification's scraping mechanism and be used for collecting the clearance mechanism of useless ink, printing mechanism upper end is provided with ink jet mechanism, connect in the ink jet mechanism scrape the material mechanism, be provided with in the printing mechanism clearance mechanism, printing mechanism power end connection power unit.

Preferably: the cleaning mechanism comprises a cleaning groove, a collecting box, a motor and a gear set, the cleaning groove is formed on a first printing cylinder of the printing mechanism, a first push plate is arranged in the cleaning groove, one end of the first push plate is connected with a first slider connecting rod, a power end connecting screw rod of the first slider connecting rod is connected with a power end of the screw rod, the gear set is connected with the power end of the gear set, the motor is connected with the power end of the gear set, the rear end of the cleaning groove is provided with the collecting box, a first power contact is arranged on the lower side of the collecting box, and a second power contact is arranged between the first printing cylinders of the printing mechanism.

According to the arrangement, when the cleaning is needed, the first printing cylinder rotates, when the first power supply contact is in contact with the second power supply contact, the cleaning groove is aligned to the collecting box, the incompletely cured ink is blown down into the cleaning groove through the scraping mechanism by the air pump, the motor is started, the motor drives the gear set, the screw rod, the first slider connecting rod and the first push plate, and the waste ink in the cleaning groove is pushed into the collecting box by the first push plate to be effectively cleaned, so that the ink is prevented from being remained, cured and blocked in a pipeline.

Preferably: clearance mechanism is including clearance groove, telescopic cylinder, second slider connecting rod, second push pedal, the shaping of clearance groove is in printing mechanism on the first printing section of thick bamboo, clearance groove internal connection the second push pedal, second push pedal power end is connected the second slider connecting rod, second slider connecting rod power end is connected telescopic cylinder, clearance groove rear end is provided with collects the box, it is provided with the air supply plug to collect the box downside, the air supply plug with printing mechanism be provided with the air supply and connect between the first printing section of thick bamboo.

So set up, when needs clearance, first printing section of thick bamboo is rotatory, works as the air supply plug contacts behind the air supply connects, represents the clearance groove has aimed at collect the box, utilizes the air pump will not the ink of complete solidification through scrape the material mechanism and blow down in the clearance groove this moment, start telescopic cylinder, telescopic cylinder drives second slider connecting rod the second push pedal, the second push pedal will the waste ink of clearance inslot portion pushes away collect inside the box, effectively clears up, prevents that the solidification from blockking up the pipeline that the ink residue.

Preferably: the protection mechanism includes play workbin, printing case, feeding case, discharge gate, printing case one end is connected go out the workbin, the printing case other end is connected the feeding case, go out the workbin go up the shaping have the discharge gate, go out the workbin with the feeding case front end all is connected with control panel.

So set up, go out the workbin the printing case the feeding case plays the guard action.

Preferably: the printing mechanism comprises a first printing cylinder, a second printing cylinder, a guide roller and a UV curing lamp, wherein the lower side of the first printing cylinder is provided with the second printing cylinder, the input end and the output end of the first printing cylinder are provided with the guide roller, and the discharge end of the first printing cylinder is provided with the UV curing lamp.

So set up, first printing section of thick bamboo with second printing section of thick bamboo plays the printing effect, the guide roll plays the guide effect, the UV curing lamp plays the solidification ink effect.

Preferably: the ink jet mechanism comprises an ink box, a flow guide box, a nozzle mounting frame and heating wires, wherein the discharge end of the ink box is connected with the flow guide box, the discharge end of the flow guide box is connected with the guide cylinder of the scraping mechanism, the nozzle mounting frame is connected with the discharge end of the guide cylinder of the scraping mechanism, and the two ends of the nozzle mounting frame are connected with the heating wires.

So set up, the ink horn plays the storage ink effect, the flow guide case play with the ink drainage extremely inside the guide cylinder, the nozzle mount frame plays the effect of installation electric nozzle, the heater strip plays and sends little heat when the clearance, prevents that the ink from solidifying.

Preferably: the scraper mechanism comprises a servo motor, a guide cylinder, a center column and spiral blades, the servo motor is connected with the ink jet mechanism, the guide box and the nozzle mounting frame, the output end of the servo motor is connected with the center column, the guide cylinder is arranged on the outer side of the center column, the spiral blades are arranged between the center column and the guide cylinder, and a feed inlet and a discharge outlet are respectively arranged between the guide cylinder and the ink jet mechanism, the guide box and the nozzle mounting frame.

According to the arrangement, when printing is not performed, the servo motor is reversed firstly, a large amount of ink is returned to the inside of the ink box by the aid of the helical blades, then the electromagnetic valve between the flow guide box and the guide cylinder is closed, the air pump is started to fill air into the guide cylinder, the servo motor is positively transferred, the nozzles corresponding to the discharge port are sequentially opened at the same time, high-pressure air flow drives the ink scraped off by the helical blades to be sprayed into the cleaning groove through the nozzles, the nozzles are cleaned, and the nozzles are prevented from being blocked by post-curing of the ink.

Preferably: the servo motor is connected with the center column through a coupler, and the helical blades are connected with the center column through welding.

So set up, improved joint strength through the welding.

Preferably: the helical blade and the guide cylinder are tightly matched, and the feed inlet and the discharge outlet are integrally formed in the guide cylinder.

With the arrangement, when the helical blade is matched with the material guide cylinder, the helical blade can be used for cleaning ink attached to the inner wall of the material guide cylinder.

Preferably: the power mechanism comprises a motor support, a driven chain wheel, a driving chain wheel and an air pump, the motor support is connected to the rear end of the first printing cylinder of the printing mechanism, the driven chain wheel and the driving chain wheel are connected to the motor support, a main motor is connected to the power end of the driving chain wheel, the rear end of the upper side of the motor support is connected to the air pump, and the air pump is connected with the ink box of the ink jet mechanism and the material guide cylinder of the material scraping mechanism through an air pipe.

According to the arrangement, the air pump provides ink outlet power for the ink box and high-pressure air for cleaning the material guide cylinder.

Compared with the prior art, the invention has the following beneficial effects:

1. the ink-jet mechanism is matched with the scraping mechanism, so that a large amount of ink can be poured back when printing is stopped, materials are saved, meanwhile, the scraping mechanism is matched with the power mechanism to quickly clean the involved ink, and the influence of nozzle blockage on next printing is avoided;

2. utilize clearance mechanism can scrape useless ink and collect, need not worry the clearance in later stage, improve the practicality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a printing mechanism of a digital printer having an ink set prevention mechanism according to the present invention;

FIG. 2 is a schematic diagram of a protection mechanism of a digital printer with an ink solidification prevention mechanism according to the present invention;

FIG. 3 is a schematic diagram of the structure of the power mechanism of the digital printer with the ink solidification prevention mechanism according to the present invention;

FIG. 4 is a schematic diagram of the position of a cleaning mechanism of the digital printer with an ink solidification prevention mechanism according to the present invention;

FIG. 5 is a schematic view of an ink-jet mechanism of the digital printer with an ink-curing prevention mechanism according to the present invention;

FIG. 6 is a schematic diagram of a scraping mechanism of a digital printer with an ink solidification prevention mechanism according to the present invention;

FIG. 7 is a schematic diagram of a helical blade configuration of a digital printer having an ink set prevention mechanism according to the present invention;

FIG. 8 is a schematic view of a screw structure of a digital printer having an ink set prevention mechanism according to the present invention;

FIG. 9 is a schematic view of a first pusher plate configuration of a digital printer having an ink set prevention mechanism according to the present invention;

FIG. 10 is a schematic diagram of a telescopic cylinder structure of a digital printer with an ink solidification prevention mechanism according to the present invention;

FIG. 11 is a schematic diagram of a second push plate structure of the digital printer with an ink curing prevention mechanism according to the present invention.

The reference numerals are explained below:

1. a protection mechanism; 2. a printing mechanism; 3. an ink jet mechanism; 4. a scraping mechanism; 5. a power mechanism; 6. a cleaning mechanism; 11. a discharging box; 12. a printing box; 13. a feeding box; 14. a discharge port; 15. a control panel; 21. a first printing cylinder; 22. a second printing cylinder; 23. a guide roller; 24. a UV curing lamp; 31. an ink cartridge; 32. a flow guide box; 33. a nozzle mounting bracket; 34. heating wires; 41. a servo motor; 42. a material guide cylinder; 43. a central column; 44. a helical blade; 45. a feed inlet; 46. a discharge port; 51. a motor bracket; 52. a driven sprocket; 53. a drive sprocket; 54. an air pump; 55. a main motor; 61. cleaning the tank; 62. a collection box; 63. an electric motor; 64. a gear set; 65. a screw; 66. a first slider link; 67. a first push plate; 68. a first power supply contact; 69. a second power supply contact; 611. a telescopic cylinder; 612. a second slider link; 613. a second push plate; 614. an air source plug; 615. and a gas source connector.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be further described with reference to the accompanying drawings in which:

example 1

The digital printing machine with the ink solidification prevention mechanism comprises a protection mechanism 1 and a printing mechanism 2, wherein the printing mechanism 2 is installed inside the protection mechanism 1, the digital printing machine further comprises an ink jet mechanism 3 used for providing ink, a scraping mechanism 4 used for preventing ink solidification and a cleaning mechanism 6 used for collecting waste ink, the upper end of the printing mechanism 2 is provided with the ink jet mechanism 3, the ink jet mechanism 3 is connected with the scraping mechanism 4, the printing mechanism 2 is provided with the cleaning mechanism 6, and the power end of the printing mechanism 2 is connected with a power mechanism 5.

As shown in fig. 1-9, the cleaning mechanism 6 includes a cleaning groove 61, a collecting box 62, a motor 63, and a gear set 64, the cleaning groove 61 is formed on the first printing cylinder 21 of the printing mechanism 2, a first push plate 67 is disposed inside the cleaning groove 61, one end of the first push plate 67 is connected to a first slider link 66, a power end of the first slider link 66 is connected to a screw 65, a power end of the screw 65 is connected to the gear set 64, a power end of the gear set 64 is connected to the motor 63, the rear end of the cleaning groove 61 is provided with the collecting box 62, a first power contact 68 is disposed at a lower side of the collecting box 62, a second power contact 69 is disposed between the first power contact 68 and the first printing cylinder 21 of the printing mechanism 2, when cleaning is required, the first printing cylinder 21 rotates, when the first power contact 68 contacts the second power contact 69, the collecting box 62 is aligned with the cleaning groove 61, the incompletely solidified ink is blown into the cleaning groove 61 by the air pump 54 through the scraping mechanism 4, the motor 63 is started, the motor 63 drives the gear set 64, the screw 65, the first slider connecting rod 66 and the first push plate 67, and the waste ink in the cleaning groove 61 is pushed into the collecting box 62 by the first push plate 67 for effective cleaning, so that the pipeline is prevented from being blocked by residual ink solidification; the protection mechanism 1 comprises a discharging box 11, a printing box 12, a feeding box 13 and a discharging port 14, one end of the printing box 12 is connected with the discharging box 11, the other end of the printing box 12 is connected with the feeding box 13, the discharging port 14 is formed in the discharging box 11, the front ends of the discharging box 11 and the feeding box 13 are connected with a control panel 15, and the discharging box 11, the printing box 12 and the feeding box 13 play a protection role; the printing mechanism 2 comprises a first printing cylinder 21, a second printing cylinder 22, a guide roller 23 and a UV curing lamp 24, wherein the second printing cylinder 22 is arranged at the lower side of the first printing cylinder 21, the guide roller 23 is arranged at the input end and the output end of the first printing cylinder 21, the UV curing lamp 24 is arranged at the discharge end of the first printing cylinder 21, the first printing cylinder 21 and the second printing cylinder 22 play a printing role, the guide roller 23 plays a guiding role, and the UV curing lamp 24 plays a role in curing ink; the ink jet mechanism 3 comprises an ink box 31, a flow guide box 32, a nozzle mounting frame 33 and heating wires 34, wherein the discharge end of the ink box 31 is connected with the flow guide box 32, the discharge end of the flow guide box 32 is connected with a material guide cylinder 42 of the scraping mechanism 4, the nozzle mounting frame 33 is connected with the discharge end of the material guide cylinder 42 of the scraping mechanism 4, the two ends of the nozzle mounting frame 33 are connected with the heating wires 34, the ink box 31 plays a role in storing ink, the flow guide box 32 plays a role in guiding the ink into the material guide cylinder 42, the nozzle mounting frame 33 plays a role in mounting an electric nozzle, and the heating wires 34 play a role in emitting; the scraping mechanism 4 comprises a servo motor 41, a material guide cylinder 42, a central column 43 and a helical blade 44, the servo motor 41 is connected on the guide box 32 and the nozzle mounting rack 33 of the ink jet mechanism 3, the output end of the servo motor 41 is connected with the central column 43, the material guide cylinder 42 is arranged outside the central column 43, the helical blade 44 is arranged between the central column 43 and the material guide cylinder 42, a feed port 45 and a discharge port 46 are respectively arranged between the material guide cylinder 42 and the guide box 32 and the nozzle mounting rack 33 of the ink jet mechanism 3, when printing is not performed, the servo motor 41 is firstly reversed, a large amount of ink is firstly returned to the inside of the ink box 31 by the helical blade 44, then an electromagnetic valve between the guide box 32 and the material guide cylinder 42 is closed, an air pump 54 is started to fill air into the material guide cylinder 42, at the moment, the servo motor 41 is positively conveyed, simultaneously nozzles corresponding to the discharge port 46 are sequentially opened, the high-, cleaning the nozzle to avoid the nozzle from being blocked by the later solidification of the ink; the servo motor 41 is connected with the central column 43 through a coupler, the helical blades 44 are connected with the central column 43 through welding, and the connection strength is improved through welding; the helical blade 44 is tightly matched with the material guide cylinder 42, the feed inlet 45 and the discharge outlet 46 are integrally formed on the material guide cylinder 42, and when the helical blade 44 is matched with the material guide cylinder 42, ink attached to the inner wall of the material guide cylinder 42 can be cleaned by the helical blade 44; the power mechanism 5 comprises a motor support 51, a driven sprocket 52, a driving sprocket 53 and an air pump 54, the motor support 51 is connected to the rear end of the first printing cylinder 21 of the printing mechanism 2, the driven sprocket 52 and the driving sprocket 53 are connected to the motor support 51, a main motor 55 is connected to the power end of the driving sprocket 53, the air pump 54 is connected to the rear end of the upper side of the motor support 51, the air pump 54 is connected to the ink box 31 of the ink jet mechanism 3 and the material guide cylinder 42 of the scraping mechanism 4 through an air pipe, and the air pump 54 provides ink outlet power for the ink box 31 and provides cleaning high-pressure air for the material guide cylinder 42.

The working principle is as follows: when not printing, firstly reversing the servo motor 41, returning a large amount of ink into the ink box 31 by using the helical blade 44, then closing the electromagnetic valve between the guide box 32 and the guide cylinder 42, starting the air pump 54 to fill air into the guide cylinder 42, at the same time, positively transmitting the servo motor 41, and simultaneously sequentially opening the nozzles corresponding to the discharge port 46, driving the ink scraped off by the helical blade 44 by high-pressure air flow to be sprayed into the cleaning groove 61 through the nozzles, cleaning the nozzles, avoiding the nozzles from being blocked by the later-period curing of the ink, when cleaning is needed, rotating the first printing cylinder 21, when the first power contact 68 is contacted with the second power contact 69, representing that the cleaning groove 61 aligns the collection box 62, blowing the incompletely-cured ink into the cleaning groove 61 through the scraping mechanism 4 by using the air pump 54, starting the motor 63, and driving the gear set 64 by the motor 63, Screw rod 65, first slider connecting rod 66, first push plate 67, inside first push plate 67 will clear up the inside useless ink of groove 61 and push to collection box 62, effectively clear up, prevent that the solidification of ink residue from blockking up the pipeline.

Example 2

As shown in fig. 10 and 11, the present embodiment is different from embodiment 1 in that: the cleaning mechanism 6 comprises a cleaning groove 61, a telescopic cylinder 611, a second slider connecting rod 612 and a second push plate 613, the cleaning groove 61 is formed on the first printing cylinder 21 of the printing mechanism 2, the cleaning groove 61 is internally connected with the second push plate 613, the power end of the second push plate 613 is connected with the second slider connecting rod 612, the power end of the second slider connecting rod 612 is connected with the telescopic cylinder 611, the rear end of the cleaning groove 61 is provided with a collecting box 62, the lower side of the collecting box 62 is provided with an air source plug 614, an air source connector 615 is arranged between the air source plug 614 and the first printing cylinder 21 of the printing mechanism 2, when cleaning is needed, the first printing cylinder 21 rotates, after the air source plug 614 contacts the air source connector 615, the collecting box 62 is aligned with the cleaning groove 61, at the moment, the incompletely solidified ink is blown down into the cleaning groove 61 through the scraping mechanism 4 by the air pump 54, the telescopic cylinder 611 is started, and the telescopic cylinder 611 drives the second slider connecting rod 612, the second push plate, The second push plate 613, the second push plate 613 will clear up the waste ink inside the groove 61 inside pushing away to collecting box 62, clear up effectively, prevent that the solidification of ink residue from blockking up the pipeline.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Claims

1. Digital printing machine with prevent ink solidification mechanism, including protection mechanism (1), printing mechanism (2), protection mechanism (1) internally mounted have printing mechanism (2), its characterized in that: the ink jet printing mechanism is characterized by further comprising an ink jet mechanism (3) for providing ink, a scraping mechanism (4) for preventing ink from solidifying and a cleaning mechanism (6) for collecting waste ink, wherein the upper end of the printing mechanism (2) is provided with the ink jet mechanism (3), the ink jet mechanism (3) is connected with the scraping mechanism (4), the printing mechanism (2) is provided with the cleaning mechanism (6), and the power end of the printing mechanism (2) is connected with the power mechanism (5).

2. The digital printer with ink set prevention mechanism as set forth in claim 1, wherein: clearance mechanism (6) are including clearance groove (61), collection box (62), motor (63), gear train (64), clearance groove (61) shaping is in on printing mechanism (2), inside first push pedal (67) that is provided with of clearance groove (61), first slider connecting rod (66) is connected to first push pedal (67) one end, first slider connecting rod (66) power end connecting screw (65), screw (65) power end is connected gear train (64), gear train (64) power end is connected motor (63), clearance groove (61) rear end is provided with collect box (62), it is provided with first power contact (68) to collect box (62) downside, first power contact (68) with be provided with second power contact (69) between printing mechanism (2).

3. The digital printer with ink set prevention mechanism as set forth in claim 1, wherein: the cleaning mechanism (6) comprises a cleaning groove (61), a telescopic cylinder (611), a second slider connecting rod (612) and a second pushing plate (613), the cleaning groove (61) is formed in the printing mechanism (2), the cleaning groove (61) is internally connected with the second pushing plate (613), the power end of the second pushing plate (613) is connected with the second slider connecting rod (612), the power end of the second slider connecting rod (612) is connected with the telescopic cylinder (611), the rear end of the cleaning groove (61) is provided with a collecting box (62), the lower side of the collecting box (62) is provided with an air source plug (614), and the air source plug (614) and an air source connector (615) are arranged between the printing mechanism (2).

4. The digital printer with ink set prevention mechanism as set forth in claim 1, wherein: protection machanism (1) is including going out workbin (11), printing case (12), feeding case (13), discharge gate (14), printing case (12) one end is connected go out workbin (11), printing case (12) other end is connected feeding case (13), go out workbin (11) and go up the shaping and have discharge gate (14), go out workbin (11) with feeding case (13) front end all is connected with control panel (15).

5. The digital printer with ink set prevention mechanism as set forth in claim 1, wherein: printing mechanism (2) are including first printing section of thick bamboo (21), second printing section of thick bamboo (22), guide roll (23), UV curing lamp (24), first printing section of thick bamboo (21) downside is provided with second printing section of thick bamboo (22), first printing section of thick bamboo (21) input and output all are provided with guide roll (23), first printing section of thick bamboo (21) discharge end is provided with UV curing lamp (24).

6. The digital printer with ink set prevention mechanism as set forth in claim 1, wherein: ink jet mechanism (3) are including ink horn (31), water conservancy diversion case (32), nozzle mounting bracket (33), heater strip (34), ink horn (31) discharge end is connected water conservancy diversion case (32), water conservancy diversion case (32) discharge end is connected scrape material mechanism (4), nozzle mounting bracket (33) are connected the discharge end of scraping material mechanism (4), nozzle mounting bracket (33) both ends are connected with heater strip (34).

7. The digital printer with ink set prevention mechanism as set forth in claim 1, wherein: the scraping mechanism (4) comprises a servo motor (41), a material guide cylinder (42), a center column (43) and a spiral blade (44), the servo motor (41) is connected to the ink jet mechanism (3), the output end of the servo motor (41) is connected to the center column (43), the material guide cylinder (42) is arranged on the outer side of the center column (43), the spiral blade (44) is arranged between the center column (43) and the material guide cylinder (42), and a feeding hole (45) and a discharging hole (46) are respectively arranged between the material guide cylinder (42) and the ink jet mechanism (3).

8. The digital printer with ink set prevention mechanism as set forth in claim 7, wherein: the servo motor (41) is connected with the central column (43) through a coupler, and the helical blade (44) is connected with the central column (43) through welding.

9. The digital printer with ink set prevention mechanism as set forth in claim 1, wherein: the helical blade (44) is tightly matched with the guide cylinder (42), and the feeding hole (45) and the discharging hole (46) are integrally formed in the guide cylinder (42).

10. The digital printer with ink set prevention mechanism as set forth in claim 1, wherein: power unit (5) include motor support (51), driven sprocket (52), drive sprocket (53), air pump (54), motor support (51) are connected printing mechanism (2) rear end, be connected with on motor support (51) driven sprocket (52) with drive sprocket (53), drive sprocket (53) power end is connected with total motor (55), motor support (51) upside rear end is connected air pump (54), air pump (54) are connected through the trachea inkjet mechanism (3) with scrape material mechanism (4).