CN218228366U - Ink jet printing device - Google Patents

Abstract

The utility model discloses an ink jet printing device, which belongs to the technical field of printing and comprises a printing shell body, wherein the outer wall of the printing shell body is assembled with a controller, the inlet end of the printing shell body is provided with an inlet, the outlet end of the printing shell body is provided with an outlet, the interior of the printing shell body is provided with an assembly cavity communicated with the inlet and the outlet, and a conveying mechanism is assembled below the assembly cavity; the utility model discloses set up tilting scraper and recoverable pigment collection mechanism, the tilting scraper can be scraped the even pigment that sprays on the printing roller, can collect unnecessary pigment to recoverable pigment collection mechanism in simultaneously, and recoverable pigment collection mechanism collects unnecessary pigment through the collection ink horn, carries the ink horn back through water pump and pipeline with the unnecessary pigment of collecting, realizes the reuse of pigment, causes pigment extravagant when solving current device printing, improves the problem of printing cost.

Description

Ink jet printing device

Technical Field

The utility model belongs to the technical field of the printing, concretely relates to ink jet printing device.

Background

The ink jet printing device is a device for jetting and printing ink on a printing stock from a nozzle of a spray head under the control of an ink jet controller, has the advantages of wide printing stock, flexible printing breadth, thick and solid ink layer, strong adhesive force and the like, and gradually shows strong development momentum in the field of packaging and printing.

Fig. 1 is a schematic structural diagram of an inkjet green digital printing device in the prior art, in the inkjet printing of the device, firstly, an inkjet head 14 sprays pigments in a pigment box 13 onto the outer wall of a printing roller 6, then, a painting head 12 in contact with the printing roller 6 uniformly paints the pigments on the printing roller 6, and then, the printing roller 6 paints the pigments adhered to the outer wall onto a printing stock.

The inventor of the application finds that: the powder brush head 12 only has the function of uniformly coating the pigment on the printing roller 6, but does not have the function of recovering the redundant pigment on the printing roller 6, so that the redundant pigment cannot be recovered and reused, the pigment is wasted during printing, and the printing cost is increased.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides an ink jet printing device has and causes pigment extravagant when solving current device printing, improves the characteristics of printing cost problem.

In order to achieve the above object, the utility model provides a following technical scheme: an ink jet printing device comprises a printing outer shell, wherein a controller is assembled on the outer wall of the printing outer shell, an inlet is formed in the inlet end of the printing outer shell, an outlet is formed in the outlet end of the printing outer shell, an assembly cavity communicated with the inlet and the outlet is formed in the printing outer shell, a conveying mechanism is assembled below the assembly cavity, a recyclable pigment ink jet printing mechanism and a recyclable hot air drying mechanism are sequentially assembled above the assembly cavity from the inlet end to the outlet end, and the conveying mechanism, the recyclable pigment ink jet printing mechanism and the recyclable hot air drying mechanism are connected with the controller through wires;

recoverable inkjet printing mechanism of pigment is including the electric jar of assembly on printing shell body top, the internal connection that the output shaft of electric jar runs through the printing shell body and extends to the assembly chamber has the link, the bottom of link is connected with the assembly jig, the top of assembly jig just be located with the link between the position have been assembled first water pump, ink horn and second water pump in proper order, bottom one side of assembly jig is provided with the printing axle, and the bearing is passed through at the both ends of printing axle and the interior wall connection of assembly jig, the printing axle cup has connect the printing roller, the opposite side of assembly jig is equipped with jet-ink pipe, jet-ink towards the printing roller of jet-ink pipe, the bottom of assembly jig just is located one side that the printing roller was kept away from to the jet-ink pipe and is connected with album ink horn, the bottom of album ink horn is connected with the scraper, the knife tip contact printing roller of scraper, be connected with first connecting pipe between the inlet of first water pump and the outlet end and the ink horn and the jet-ink horn of first water pump and the second water pump, be connected with the second connecting pipe between the outlet and the ink horn of inlet of second water pump, the wire is connected between electric jar, first water pump and controller.

Preferably, transport mechanism sets up two connecting axles and the connection casing at printing shell body outer wall in the assembly chamber inside including the symmetry, and the bearing is passed through to the one end of connecting axle and the interior wall connection in assembly chamber, and the other end of connecting axle runs through the printing shell body and extends to the printing shell body external connection and has a gear, and the section of running through of connecting axle passes through the bearing and is connected with the section of running through of printing shell body, the transfer roller has been cup jointed, two to the inside that just is located the assembly chamber on the connecting axle the transmission is connected with the conveyer belt between the transfer roller, and the upper surface of conveyer belt is parallel with the lower surface of import and export, and two gears are located the connection casing, the outer wall of connection casing is equipped with the motor, the inside that just is located two gears of connection casing is provided with the connecting rod, and the one end of connecting rod passes through shaft coupling and motor output shaft connection, and the other end of connecting rod passes through the bearing and is connected the interior wall connection of connection casing, cup joint two cavity worms on the connecting rod, two cavity worms are connected with two gear engagement, and the wire is connected between motor and the controller.

Preferably, the hot air drying mechanism comprises an air heater assembled at the top end of the printing outer shell and an upper blowing pipe assembled in the assembly cavity and positioned on one side far away from the printing roller, a first connecting pipe with a valve is connected between the air heater and the upper blowing pipe, and the air heater is connected with the controller through a wire.

Preferably, one end of the connecting shell, which is far away from the printing outer shell, is an opening end, and the opening end of the connecting shell is connected with a closing plate through a bolt.

Preferably, be connected with the fixed block on the printing shell body and be located the import and export lateral wall below that is close to each other, just be located the import and export lateral wall top that is close to each other on the printing shell body and be provided with movable block, two the top of movable block is connected with the threaded rod, and the threaded rod runs through the printing shell body and extends to the top of printing shell body, threaded connection between threaded rod and the printing shell body.

Preferably, the bottom end of the movable block close to the inlet side is connected with cleaning cotton.

Preferably, the front of the printing shell body is provided with an assembly opening, the inside of the assembly opening is provided with an observation access window, and a rotating shaft is connected between the top end of the observation access window and the printing shell body.

Preferably, the assembly chamber is arranged in an inclined structure, and a control valve is assembled on the printing outer shell and at the inclined bottom end of the assembly chamber.

Preferably, the hot air drying mechanism further comprises a lower blowpipe assembled below the inner part of the assembly cavity, and a second connecting pipe with a valve is connected between the lower blowpipe and the first connecting pipe with the valve.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses set up tilting scraper and recoverable pigment collection mechanism, the tilting scraper can be scraped the even pigment that sprays on the printing roller, can collect unnecessary pigment to recoverable pigment collection mechanism in simultaneously, and recoverable pigment collection mechanism collects unnecessary pigment through the collection ink horn, carries the ink horn back through water pump and pipeline with the unnecessary pigment of collecting, realizes the reuse of pigment, causes pigment extravagant when solving current device printing, improves the problem of printing cost.

2. The utility model discloses import and exit position set up fixed block and liftable movable block, can carry out the interval according to the specification of treating the stock and adjust, avoid import and export the problem that the interval is too big to lead to the dust to get into to take place, set up clean cotton on the movable block of import position simultaneously, the adsorbable dust of treating on the stock, both cooperate, can improve the printing quality of stock.

3. The utility model discloses set up assembly opening and mobile observation access panel, not only make things convenient for the printing personnel to know the printing process, make things convenient for the printing personnel to carry out relevant washing, maintenance or maintenance work moreover.

4. The utility model discloses the assembly chamber is the tilting structure, sets up the control valve simultaneously, can in time discharge cleaning wastewater, is connected with the air heater simultaneously, can dry, avoids mildewing, excellent in use effect.

Drawings

FIG. 1 is a schematic front view of the prior art;

fig. 2 is a perspective view of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

fig. 4 is a schematic view of the driving mechanism of the present invention;

FIG. 5 is a vertical sectional view of the present invention;

FIG. 6 is an enlarged view of the portion A of FIG. 4 according to the present invention;

FIG. 7 is a schematic view of a printing mechanism according to the present invention;

FIG. 8 is a schematic view of the present invention in the unassembled transport mechanism of FIG. 4;

fig. 9 is a schematic view of the drying mechanism of the present invention;

FIG. 10 is a schematic view of the inspection and repair window of the present invention;

in the figure: 1. printing an outer shell; 2. an inlet; 3. a controller; 4. observing the maintenance window; 5. an assembly port; 6. connecting the shell; 7. a closing plate; 8. a gear; 9. a motor; 10. a conveyor belt; 11. a hollow worm; 12. a connecting rod; 13. a connecting shaft; 14. an outlet; 15. a conveying roller; 16. an assembly chamber; 17. a control valve; 18. an electric cylinder; 19. a connecting frame; 20. an ink cartridge; 21. an ink jet tube; 22. an ink collecting box; 23. a scraper; 24. a printing roller; 25. a printing shaft; 26. an assembly frame; 27. a first water pump; 28. a first connecting pipe; 29. a second connecting pipe; 30. a second water pump; 31. an upper blowpipe; 32. a threaded rod; 33. a movable block; 34. cleaning cotton; 35. a fixed block; 36. a lower blowpipe; 37. a hot air blower; 38. a first valved connecting tube; 39. the second connecting pipe with the valve; 40. and rotating the shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 2-10, the present invention provides the following technical solutions: an ink jet printing device comprises a printing outer shell 1, wherein a controller 3 with the model of SPC-STW-26A1 is assembled on the outer wall of the printing outer shell 1, an inlet 2 is arranged at the inlet end of the printing outer shell 1, an outlet 14 is arranged at the outlet end of the printing outer shell 1, an assembly cavity 16 communicated with the inlet 2 and the outlet 14 is arranged inside the printing outer shell 1, a conveying mechanism is assembled below the assembly cavity 16, a pigment recyclable ink jet printing mechanism and a hot air drying mechanism are sequentially assembled above the assembly cavity 16 from the inlet end to the outlet end, and the conveying mechanism, the pigment recyclable ink jet printing mechanism and the hot air drying mechanism are connected with the controller 3 through leads;

the pigment recoverable ink jet printing mechanism comprises an electric cylinder 18 with model number HE100, which is assembled at the top end of a printing outer shell 1, an output shaft of the electric cylinder 18 penetrates through the printing outer shell 1 and extends to the inside of an assembly cavity 16, a connecting frame 19 is connected with the bottom end of the connecting frame 19, a mounting frame 26 is connected with the top end of the mounting frame 26, a first water pump 27 with model number WUY, an ink box 20 and a second water pump 30 with model number WUY are sequentially assembled at the position between the top end of the mounting frame 26 and the connecting frame 19, a printing shaft 25 is arranged at one side of the bottom end of the mounting frame 26, two ends of the printing shaft 25 are connected with the inner wall of the mounting frame 26 through bearings, a printing roller 24 is sleeved outside the printing shaft 25, the other side of the assembly frame 26 is provided with an ink jet pipe 21, the ink jet of the ink jet pipe 21 faces the printing roller 24, one side of the bottom end of the assembly frame 26, which is located at the ink jet pipe 21 and far away from the printing roller 24, is connected with an ink collecting box 22 higher than the printing roller 24, the bottom end of the ink collecting box 22 is connected with a scraper 23, the knife tip of the scraper 23 contacts the printing roller 24, a first connecting pipe 28 is connected between the inlet end of the first water pump 27 and the ink box 20 and between the outlet end of the first water pump 27 and the ink jet pipe 21, a second connecting pipe 29 is connected between the inlet end of the second water pump 30 and the ink collecting box 22 and between the outlet end of the second water pump 30 and the ink box 20, and the electric cylinder 18, the first water pump 27 and the second water pump 30 are connected with the controller 3 through wires.

Specifically, the transmission mechanism comprises two connecting shafts 13 symmetrically arranged inside an assembly cavity 16 and a connecting shell 6 connected to the outer wall of a printing outer shell 1, one end of each connecting shaft 13 is connected with the inner wall of the assembly cavity 16 through a bearing, the other end of each connecting shaft 13 penetrates through the printing outer shell 1 and extends to the outside of the printing outer shell 1 to be connected with a gear 8, a penetrating section of each connecting shaft 13 is connected with a penetrating section of the printing outer shell 1 through a bearing, a conveying roller 15 is sleeved on the connecting shaft 13 and located inside the assembly cavity 16, a conveying belt 10 is connected between the two conveying rollers 15 in a transmission mode, the upper surface of the conveying belt 10 is parallel to the lower surfaces of an inlet 2 and an outlet 14, the two gears 8 are located in the connecting shell 6, the outer wall of the connecting shell 6 is provided with a motor 9 with a model of DZ65M01-1WRV, a connecting rod 12 is arranged inside the connecting shell 6 and located below the two gears 8, one end of the connecting rod 12 is connected with an output shaft of the motor 9 through a coupler, the other end of the connecting rod 12 is connected with the inner wall of the connecting shell 6 through a bearing, two hollow worms 11 are sleeved on the connecting rod 12, the connecting rod 11, the two worms 11 are connected with a controller 3 through wires.

Specifically, the hot air drying mechanism comprises a hot air blower 37 with the model number of HLJT-3380-006 and an upper blowing pipe 31 which is assembled in the assembly cavity 16 and is positioned on one side far away from the printing roller 24, a first tape valve connecting pipe 38 is connected between the hot air blower 37 and the upper blowing pipe 31, and the hot air blower 37 is connected with the controller 3 through a lead.

Specifically, one end of the connecting shell 6, which is far away from the printing outer shell 1, is an open end, and the open end of the connecting shell 6 is connected with a closing plate 7 through a bolt.

The working principle of the embodiment is as follows:

before ink jet printing, determining descending parameters of a printing roller 24 according to the specification of a to-be-printed object, starting the electric cylinder 18 through the controller 3, driving an output shaft to extend by the electric cylinder 18, driving structures assembled on the connecting frame 19, the assembling frame 26 and the assembling frame 26 to move downwards by the output shaft of the electric cylinder 18 until the structures move to the determined parameters, and closing the electric cylinder 18 by the controller 3;

before ink-jet printing, the valve on the first valve-carrying connecting pipe 38 is opened;

before ink jet printing, a motor 9, a first water pump 27, a second water pump 30 and a hot air blower 37 are started through a controller 3, the motor 9 drives an output shaft to rotate, the output shaft of the motor 9 drives a connecting rod 12 to rotate, the connecting rod 12 drives two hollow worms 11 to rotate, the two hollow worms 11 drive two gears 8 to rotate, the two gears 8 drive two connecting shafts 13 to rotate, the two connecting shafts 13 drive two conveying rollers 15 to rotate, the two conveying rollers 15 drive a conveying belt 10 to convey, the first water pump 27 sends pigments in an ink box 20 into an ink jet pipe 21 through a first connecting pipe 28 to be sprayed onto a printing roller 24, a scraper 23 scrapes the pigments on the printing roller 24 uniformly, the scraped residual pigments slide into an ink collecting box 22 and are sent back into the ink box 20 through a second connecting pipe 29 by the second water pump 30 to complete pigment recycling, the hot air blower 37 heats air and enters an assembly cavity 16 through a first belt valve connecting pipe 38, and a good ink jet printing environment is provided;

during ink jet printing, a to-be-printed material is placed on the conveyor belt 10 through the inlet 2, the conveyor belt 10 conveys the to-be-printed material to the printing roller 24 to be contacted with the printing roller 24, the printing roller 24 is driven to rotate through continuous conveying of the conveyor belt 10, printing of the to-be-printed material is completed, the to-be-printed material is printed, and the printed material is taken out through the outlet 14.

Example 2

The present embodiment is different from embodiment 1 in that:

specifically, be connected with fixed block 35 on the printing shell body 1 and be located import 2 and export 14 lateral wall below that is close to each other, be provided with movable block 33 on the printing shell body 1 and be located import 2 and export 14 lateral wall top that is close to each other, the top of two movable blocks 33 is connected with threaded rod 32, threaded rod 32 runs through printing shell body 1 and extends to the top of printing shell body 1, threaded connection between threaded rod 32 and printing shell body 1.

Specifically, the bottom end of the movable block 33 near the inlet 2 is connected with a cleaning cotton 34.

The working principle of the embodiment is as follows:

before ink jet printing, the cleaning cotton 34 on the two movable blocks 33 at the inlet 2 is contacted with the two fixed blocks 35, and meanwhile, the two movable blocks 33 at the outlet 14 are contacted with the two fixed blocks 35, so that the device is closed, and dust is prevented from entering;

during ink jet printing, the two threaded rods 32 are twisted forwards according to the specification of a to-be-printed material, so that the two threaded rods 32 drive the two movable blocks 33 to move upwards, the gap between the cleaning cotton 34 on the two movable blocks 33 at the position of the inlet 2 and the two fixed blocks 35 conforms to the entering specification of the to-be-printed material, and the gap between the two movable blocks 33 and the two fixed blocks 35 at the position of the outlet 14 conforms to the entering specification of the to-be-printed material;

because the cleaning cotton 34 is arranged on the two movable blocks 33 at the position of the inlet 2, dust on the printing bearing surface of the printing stock to be printed can be adsorbed, and meanwhile, the adjusted gap only meets the entering specification of the printing stock to be printed, so that the possibility of dust entering can be reduced, the dust entering and the dust entering are matched, and the printing quality of the printing stock can be obviously improved.

Example 3

The present embodiment is different from embodiment 2 in that:

specifically, the front of the printing outer shell 1 is provided with an assembly opening 5, the inside of the assembly opening 5 is provided with an observation access window 4, and a rotating shaft 40 is connected between the top end of the observation access window 4 and the printing outer shell 1.

The working principle of the embodiment is as follows:

in the ink jet printing process, the process can be checked through the inspection window 4;

meanwhile, the structure of the device can be maintained or overhauled by observing the access window 4.

Example 4

The present embodiment is different from embodiment 3 in that:

specifically, the assembly chamber 16 is arranged in an inclined structure, and a control valve 17 is assembled on the printing outer shell 1 and at the inclined bottom end of the assembly chamber 16.

If need wash printing roller 24 and other structures, go on through observing access panel 4, open control valve 17 simultaneously, washing waste water flows out from control valve 17 along the radian of slope of assembly chamber 16, makes things convenient for waste water treatment.

Example 5

The present embodiment is different from embodiment 4 in that:

specifically, the hot air drying mechanism further includes a lower blowing pipe 36 mounted below the inside of the mounting chamber 16, and a second connection pipe 39 with a valve is connected between the lower blowing pipe 36 and the first connection pipe 38 with a valve.

The working principle of the embodiment is as follows:

after the wastewater treatment is completed, the valve of the second valve-equipped connection pipe 39 is opened, and the air heater 37 heats the air and enters the bottom end of the assembly chamber 16 through the second valve-equipped connection pipe 39 to dry the assembly chamber 16.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (9)

1. An inkjet printing device comprising a printing housing (1), characterized in that: the outer wall of the printing outer shell (1) is provided with a controller (3), the inlet end of the printing outer shell (1) is provided with an inlet (2), the outlet end of the printing outer shell (1) is provided with an outlet (14), an assembly cavity (16) communicated with the inlet (2) and the outlet (14) is arranged in the printing outer shell (1), a conveying mechanism is assembled below the assembly cavity (16), a pigment recoverable ink-jet printing mechanism and a hot air drying mechanism are sequentially assembled from the inlet end to the outlet end above the assembly cavity (16), and the conveying mechanism, the pigment recoverable ink-jet printing mechanism and the hot air drying mechanism are connected with the controller (3) through wires;

the ink jet printing mechanism with the recyclable pigment comprises an electric cylinder (18) assembled at the top end of a printing outer shell (1), an output shaft of the electric cylinder (18) penetrates through the printing outer shell (1) and extends to the inside of an assembly cavity (16) to be connected with a connecting frame (19), the bottom end of the connecting frame (19) is connected with an assembly frame (26), the top end of the assembly frame (26) is sequentially provided with a first water pump (27), an ink box (20) and a second water pump (30) at positions between the top end of the assembly frame (26) and the connecting frame (19), one side of the bottom end of the assembly frame (26) is provided with a printing shaft (25), two ends of the printing shaft (25) are connected with the inner wall of the assembly frame (26) through bearings, the printing roller (24) is sleeved outside the printing shaft (25), the other side of the assembly frame (26) is provided with an ink jet pipe (21), the ink jet pipe (21) is towards the printing roller (24), the bottom end of the assembly frame (26) is connected with an ink collecting pipe (22) at one side far away from the printing roller (24) and is connected with a scraper (23), the ink box collecting pipe (23), and a scraper of the ink jet pipe (23) is connected with a first water pump inlet pipe (27) and a scraper (27) at a first ink jet pipe (27) and a first connecting pipe (27) connected with a first ink jet pipe (27) at a first ink jet pipe (21), a second connecting pipe (29) is connected between the inlet end of the second water pump (30) and the ink collecting box (22) and between the outlet end of the second water pump (30) and the ink box (20), and the electric cylinder (18), the first water pump (27) and the second water pump (30) are connected with the controller (3) through wires.

2. An inkjet printing apparatus according to claim 1, wherein: the conveying mechanism comprises two connecting shafts (13) symmetrically arranged inside an assembly cavity (16) and a connecting shell (6) connected to the outer wall of the printing outer shell (1), one end of each connecting shaft (13) is connected with the inner wall of the assembly cavity (16) through a bearing, the other end of each connecting shaft (13) penetrates through the printing outer shell (1) and extends to the outside of the printing outer shell (1) to be connected with a gear (8), the penetrating section of each connecting shaft (13) is connected with the penetrating section of the printing outer shell (1) through a bearing, conveying rollers (15) are sleeved on the connecting shafts (13) and located inside the assembly cavity (16) and are connected with conveying rollers (10) in a transmission mode between the conveying rollers (15), the upper surfaces of the conveying rollers (10) are parallel to the lower surfaces of an inlet (2) and an outlet (14), the two gears (8) are located in the connecting shell (6), a motor (9) is assembled on the outer wall of the connecting shell (6), a connecting rod (12) is arranged inside the connecting shell (6) and in a hollow mode below the two gears (8), one end of the connecting rod (12) is connected with the other end of the motor (9) through a shaft coupling, the connecting rod (12) is connected with the worm (11) through a bearing, and the connecting rod (11) is connected with the connecting shell (6), two hollow worms (11) are meshed with two gears (8), and a motor (9) is connected with the controller (3) through a lead.

3. An inkjet printing apparatus according to claim 1, wherein: the hot air drying mechanism comprises an air heater (37) assembled at the top end of the printing outer shell (1) and an upper blowing pipe (31) assembled in the assembly cavity (16) and located on one side of the printing roller (24), a first strip valve connecting pipe (38) is connected between the air heater (37) and the upper blowing pipe (31), and the air heater (37) is connected with the controller (3) through a wire.

4. An inkjet printing apparatus according to claim 2, wherein: the printing device is characterized in that one end, far away from the printing outer shell (1), of the connecting shell (6) is an opening end, and the opening end of the connecting shell (6) is connected with a closing plate (7) through a bolt.

5. An inkjet printing apparatus according to claim 1, wherein: last and be located lateral wall below that import (2) and export (14) are close to each other and be connected with fixed block (35) of printing shell body (1), just be located the lateral wall top that import (2) and export (14) are close to each other on printing shell body (1) and be provided with movable block (33), two the top of movable block (33) is connected with threaded rod (32), and threaded rod (32) run through printing shell body (1) and extend to the top of printing shell body (1), threaded connection between threaded rod (32) and printing shell body (1).

6. An inkjet printing apparatus according to claim 5, wherein: the bottom end of the movable block (33) close to the inlet (2) side is connected with cleaning cotton (34).

7. An inkjet printing apparatus according to claim 1, wherein: the front of printing shell body (1) is provided with assembly opening (5), the inside of assembly opening (5) is provided with observation access panel (4), be connected with axis of rotation (40) between the top of observation access panel (4) and printing shell body (1).

8. An inkjet printing apparatus according to claim 1, wherein: the assembling cavity (16) is arranged in an inclined structure, and a control valve (17) is assembled on the printing outer shell (1) and is positioned at the inclined bottom end of the assembling cavity (16).

9. An inkjet printing apparatus according to claim 3, wherein: the hot air drying mechanism further comprises a lower blowing pipe (36) assembled below the interior of the assembling cavity (16), and a second connecting pipe (39) with a valve is connected between the lower blowing pipe (36) and the first connecting pipe (38) with the valve.

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