Drying device of single-paper ink-jet printer
By designing a double-sided flipped paper-exit structure and a directional hot air ejection system in the drying device of a single-sheet inkjet printer, the problems of uneven drying and low efficiency are solved, and efficient and uniform paper drying is achieved, which is suitable for high-speed printing.
Patent Information
- Application Number
- CN202422493263.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-10-15
AI Technical Summary
The drying devices of existing single-sheet inkjet printers have problems of uneven drying and low efficiency when printing at high speed, especially the drying rate of the bottom of the paper is lower than the front, resulting in an increased risk of paper jams.
A double-sided flipped paper structure is designed, combined with the hot air chambers on both sides of the upper and lower sides, and through the cooperation of a fixed pressure bleed valve and a hot air fan, the double-sided directional drying of the paper is achieved, improving drying efficiency and uniformity.
It achieves high efficiency of drying 200 A4 paper surfaces per minute, shortens the housing length of the drying device, reduces the printer volume, improves the drying uniformity of the paper, and reduces the risk of paper jams.
Smart Images
Figure CN223045417U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of inkjet printers, and particularly relates to a drying device for a single-sheet inkjet printer. Background Art
[0002] In inkjet digital printing equipment, since the printing medium is paper and inkjet printing uses ink which contains a large amount of water, if the paper cannot be dried quickly, it is impossible to ensure smooth paper feeding and it is easy to cause paper jams.
[0003] CN 217807634 U discloses a double-sided flipping mechanism of an inkjet printer. Among them, the inkjet printer establishes dual-channel printing based on the double-sided flipping mechanism, and the single-sheet printing speed reaches 200 ppm per minute, that is, 100 A4 sheets need to be double-sided printed per minute, which means that the drying device in this inkjet printer needs to increase the drying requirement to drying 200 A4 paper surfaces per minute.
[0004] At present, the drying device of a single-sheet inkjet printer still uses the drying device in continuous paper printing equipment. Specifically, a drying box is set, and a conveying channel from right to left is arranged in the drying box. The drying efficiency is affected by the length of the conveying channel, and since the bottom surface of the paper contacts the conveying channel, its drying rate is lower than that of the front surface of the paper, resulting in the problem of uneven drying. Summary of the Utility Model
[0005] In order to solve the above technical problems, the technical solution of the utility model is: a drying device for a single-sheet inkjet printer, including a housing, a horizontal paper feeding channel that divides the internal space of the housing into an upper drying area and a lower drying area, an upper flipping and lower paper feeding channel located in the upper drying area, and a lower flipping and upper paper feeding channel located in the lower drying area;
[0006] An upper hot air cavity that sprays hot air towards the upper flipping and lower paper feeding channel is arranged beside the upper flipping and lower paper feeding channel. The upper hot air cavity enters hot air from its upper port and discharges hot air from its lower port;
[0007] A lower hot air cavity that sprays hot air towards the lower flipping and upper paper feeding channel is arranged beside the lower flipping and upper paper feeding channel. The lower hot air cavity enters hot air from its lower port and discharges hot air from its upper port;
[0008] Among them, a constant pressure air release valve is installed at the lower port of the upper hot air cavity and the upper port of the lower hot air cavity.
[0009] Specifically, both the upper hot air cavity and the lower hot air cavity are connected to a hot air blower, and the hot air blower is used to input hot air into the upper hot air cavity and the lower hot air cavity.
[0010] Specifically, the housing is provided with a paper inlet and a paper outlet, and the horizontal paper feed channel is located between the paper inlet and the paper outlet.
[0011] Specifically, one end of the upper flip - down paper feed channel communicates with the paper outlet, the other end communicates with the upper flip - over paper path, the upper flip - over paper path communicates with the upper flip - up paper feed channel, and the upper flip - up paper feed channel communicates with the horizontal paper feed channel.
[0012] Specifically, one end of the lower flip - up paper feed channel communicates with the paper outlet, the other end communicates with the lower flip - over paper path, the lower flip - over paper path communicates with the lower flip - down paper feed channel, and the lower flip - down paper feed channel communicates with the horizontal paper feed channel.
[0013] Specifically, the upper hot air cavity is in a long - tube shape, and a plurality of upper hot air nozzles are arranged on the side facing the upper flip - down paper feed channel; the lower hot air cavity is also in a long - tube shape, and a plurality of lower hot air nozzles are arranged on the side facing the lower flip - up paper feed channel.
[0014] Specifically, a plurality of the upper hot air nozzles are evenly distributed on one side of the upper hot air cavity, and a plurality of the lower hot air nozzles are evenly distributed on one side of the lower hot air cavity.
[0015] Specifically, the diameters of the upper port and the lower port of the upper hot air cavity are equal, and both are smaller than the inner diameter of its cylinder; the diameters of the upper port and the lower port of the lower hot air cavity are equal, and both are smaller than the inner diameter of its cylinder.
[0016] Specifically, the upper flip - down paper feed channel and the lower flip - up paper feed channel are both connected with a paper conveying structure. The paper conveying structure includes a conveyor belt for conveying paper, a driving wheel, a driven wheel connected to the conveyor belt, and a driving motor for driving the driving wheel to rotate. The driving motor can rotate forward and reverse alternately, driving the paper to move back and forth on the conveyor belt.
[0017] The technical solution provided by the present utility model has the following advantages compared with the prior art:
[0018] 1. A double - sided flip paper feed structure is provided in the drying device, with double - channel paper feeding. The drying rate reaches 200 sides of A4 paper per minute, which is suitable for a single - sheet paper inkjet printer with high - speed printing. At the same time, the length of the housing of the drying device is shortened, the volume of the printer is reduced, the paper path is extended, the drying rate is further increased, the paper surface is flipped, and the drying is uniform.
[0019] 2. An upper drying cavity and a lower drying cavity are provided, and hot air is sprayed towards the paper feed path directionally. While drying the paper surface, under the action of wind pressure, the paper surface is closely attached to the paper feed path, increasing the adhesion between the paper and the paper path, reducing the risk of the paper deviating from or detaching from the paper path. At the same time, the hot air blowing directly on the paper surface further improves the paper drying rate. Description of the Drawings
[0020] Figure 1 It is the structural diagram of the drying device without the upper hot air chamber and the lower hot air chamber in this embodiment;
[0021] Figure 2 It is the distribution position diagram of the upper drying area and the lower drying area in this embodiment;
[0022] Figure 3 It is the overall structural diagram of the drying device in this embodiment;
[0023] Figure 4 It is the overall structural diagram of the single-sheet inkjet printer in this embodiment.
[0024] As shown in the figure: 1. Housing; 11. Paper inlet; 12. Paper outlet; 13. Upper drying area; 14. Lower drying area; 2. Paper feeding structure; 21. Horizontal paper feeding channel; 22. Upper flipping upper paper feeding channel; 221. Upper paper path flap; 23. Upper flipping flipping paper path; 24. Upper flipping lower paper feeding channel; 25. Lower flipping lower paper feeding channel; 251. Lower paper path flap; 26. Lower flipping flipping paper path; 27. Lower flipping upper paper feeding channel; 28. Paper feeding motor; 3. Upper hot air chamber; 31. Upper hot air outlet; 4. Lower hot air chamber; 41. Lower hot air outlet; 5. Printing unit; 6. Paper receiving unit; 7. Paper feeding mechanism. Detailed implementation manners
[0025] For the convenience of understanding, the drying device of the single-sheet inkjet printer is described below in combination with embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.
[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation and positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0028] As Figure 1 shown, a drying device for a single-sheet inkjet printer includes a housing 1 and a paper feeding structure 2 located inside the housing 1. The housing 1 is provided with a paper inlet 11 and a paper outlet 12 at opposite positions. The paper feeding structure 2 includes a horizontal paper feeding channel 21 provided between the paper inlet 11 and the paper outlet 12, an upper flipping upper paper feeding channel 22 communicating with the horizontal paper feeding channel 21, an upper flipping paper turning channel 23 communicating with the upper flipping upper paper feeding channel 22, an upper flipping lower paper feeding channel 24 communicating with the upper flipping paper turning channel 23, a lower flipping lower paper feeding channel 25 communicating with the horizontal paper feeding channel 21, a lower flipping paper turning channel 26 communicating with the lower flipping lower paper feeding channel 25, and a lower flipping upper paper feeding channel 27 communicating with the lower flipping paper turning channel 26. Among them, a paper feeding motor 28 and a paper rubbing wheel are provided at a position of the horizontal paper feeding channel 21 close to the paper inlet 11. The paper feeding motor 28 drives the paper rubbing wheel to rotate, and the paper is brought into the horizontal paper feeding channel 21.
[0029] Continuing as Figure 1 shown, an upper paper path flap 221 is provided at a position of the upper flipping upper paper feeding channel 22 close to the horizontal paper feeding channel 21. The upper paper path flap 221 is controlled by an electromagnet. When the number of sheets of paper entering from the paper inlet 11 is even, the upper paper path flap 221 is pulled down under the action of the electromagnet, and the paper will enter the upper flipping upper paper feeding channel 22 along the upper paper path flap 221, and move upward along the paper path of the upper flipping upper paper feeding channel 22, enter the upper flipping paper turning channel 23, be turned over and enter the upper flipping lower paper feeding channel 24, and then be discharged from the paper outlet 12.
[0030] Continuing as Figure 1As shown in the figure, the lower reverse paper feed channel 25 is provided with a lower paper path flap 251 near the horizontal paper feed channel 21. The lower paper path flap 251 is also controlled by an electromagnet. When the number of sheets of paper entering through the paper inlet 11 is odd, the upper paper path flap 221 is not pulled down. The paper reaches the lower paper path flap 251 through the horizontal paper feed channel 21. The lower paper path flap 251 rotates upward under the action of the electromagnet to dock with the horizontal paper feed channel 21. The paper will then enter the lower reverse paper feed channel 25 along the lower paper path flap 251 and feed downward along the reverse paper feed channel into the lower reverse turning paper path 26. After turning, it enters the lower reverse upper paper feed channel 27 and is then discharged from the paper outlet 12.
[0031] As Figure 2 shown in the figure, the horizontal paper feed channel 21 divides the internal space of the housing 1 into an upper drying area 13 and a lower drying area 14. The upper reverse upper paper feed channel 22, the upper reverse turning paper path 23, and the upper reverse lower paper feed channel 24 are located in the upper drying area 13. The lower reverse paper feed channel 25, the lower reverse turning paper path 26, and the lower reverse upper paper feed channel 27 are located in the lower drying area 14.
[0032] As Figure 3 shown in the figure, an upper hot air chamber 3 is provided beside the upper reverse lower paper feed channel 24. The upper hot air chamber 3 is in the shape of a long cylinder and has an upper port and a lower port. The diameters of the upper port and the lower port are equal, and both are smaller than the inner diameter of its cylinder body. The upper port is connected to a hot air blower located outside the housing 1. The lower port is equipped with a constant pressure air release valve. A number of evenly distributed upper hot air nozzles 31 are provided on the side of the cylinder body facing the upper reverse lower paper feed channel 24. The hot air conveyed by the hot air blower enters from the upper port of the upper hot air chamber 3 and is ejected from the upper hot air nozzles 31 to dry the paper. At the same time, under the blowing action of the air flow, the paper is closely attached to the upper reverse lower paper feed channel 24. When the air pressure inside the upper hot air chamber 3 reaches a certain value, the constant pressure air release valve automatically opens, and the hot air is discharged from the lower port of the upper hot air chamber 3.
[0033] Continuing as Figure 3 shown in the figure, a lower hot air chamber 4 is provided beside the lower reverse upper paper feed channel 27. The lower hot air chamber 4 is also in the shape of a long cylinder and also has an upper port and a lower port. The diameters of the upper port and the lower port are equal, and both are smaller than the inner diameter of its cylinder body. The upper port is connected to a hot air blower located outside the housing 1. The lower port is equipped with a constant pressure air release valve. A number of evenly distributed lower hot air nozzles 41 are provided on the side of the cylinder body facing the lower reverse upper paper feed channel 27. The hot air conveyed by the hot air blower enters from the lower port of the lower hot air chamber 4 and is ejected from the lower hot air nozzles 41 to dry the paper. At the same time, under the blowing action of the air flow, the paper is closely attached to the lower reverse upper paper feed channel 27. When the air pressure inside the lower hot air chamber 4 reaches a certain value, the constant pressure air release valve automatically opens, and the hot air is discharged from the upper port of the lower hot air chamber 4.
[0034] Continuing as Figure 3As shown, a horizontal paper feed channel 21, an upper flip-up paper feed channel 22, an upper flip-over paper path 23, an upper flip-down paper feed channel 24, a lower flip-down paper feed channel 25, a lower flip-over paper path 26, and a lower flip-up paper feed channel 27 are respectively connected with a paper conveying structure. The paper conveying structure includes a conveyor belt for conveying the paper in the paper feed channel or paper path, a driving wheel connected to the conveyor belt, a driven wheel, and a driving motor for driving the driving wheel to rotate. The driving motor drives the conveyor belt through the driving wheel to convey the paper, and the driven wheel cooperates. Then, according to requirements, an appropriate tensioning wheel is cooperated; the driving motors at the upper flip-down paper feed channel 24 and the lower flip-up paper feed channel 27 can alternately rotate forward and backward to drive the paper to move back and forth on the conveyor belt.
[0035] As Figure 4 shown, the single-sheet inkjet printer of this embodiment includes a drying device, a printing unit 5, a paper receiving unit 6, and a paper feeding mechanism 7. The paper enters the printing unit 5 from the paper feeding mechanism 7, and after printing, it enters the drying device. After drying the ink on the paper surface, the paper is discharged from the paper outlet 12 and enters the paper receiving unit 6.
[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A drying device for a single-sheet inkjet printer, characterized in that: It comprises a shell, a horizontal paper feeding channel which divides the inner space of the shell into an upper drying area and a lower drying area, an upward turning downward paper feeding channel located in the upper drying area, and a downward turning upward paper feeding channel located in the lower drying area; An upper hot air chamber for spraying hot air toward the upper hot air chamber is provided beside the upper flip and lower paper feeding passage, and the upper hot air chamber enters hot air from an upper port thereof and discharges hot air from a lower port thereof; A lower hot air chamber for spraying hot air toward the lower hot air chamber is provided beside the lower flip upper paper feeding passage, and the lower hot air chamber enters hot air from a lower port thereof and discharges hot air from an upper port thereof; Wherein, the lower port of the upper hot air chamber and the upper port of the lower hot air chamber are both equipped with a constant pressure air release valve.
2. The drying device of the single sheet inkjet printer according to claim 1, characterized in that: The upper hot air chamber and the lower hot air chamber are both connected to a hot air blower, and the hot air blower is used to input hot air into the upper hot air chamber and the lower hot air chamber.
3. The drying device of the single sheet inkjet printer according to claim 1, characterized in that: The shell is provided with a paper inlet and a paper outlet, and the horizontal paper feeding channel is located between the paper inlet and the paper outlet.
4. The drying device of the single sheet inkjet printer according to claim 3, characterized in that: One end of the upturned lower paper feeding channel is connected to the paper outlet, and the other end is connected to the upturned flipping paper path, the upturned flipping paper path is connected to the upturned upper paper feeding channel, and the upturned upper paper feeding channel is connected to the horizontal paper feeding channel.
5. The drying device of the single sheet inkjet printer according to claim 3, characterized in that: One end of the down-turning upper paper feeding channel is connected to the paper outlet, and the other end is connected to the down-turning paper feeding channel, the down-turning paper feeding channel is connected to the down-turning lower paper feeding channel, and the down-turning lower paper feeding channel is connected to the horizontal paper feeding channel.
6. The drying device of the single sheet inkjet printer according to claim 1, characterized in that: The upper hot air chamber is in the shape of a long cylinder, and is provided with a plurality of upper hot air outlets toward the upper flipping and lower paper feeding passage side. The lower hot air chamber is also in the shape of a long cylinder, and is provided with a plurality of lower hot air outlets toward the lower flipping and upper paper feeding passage side.
7. The drying device of the single sheet inkjet printer according to claim 6, characterized in that: The plurality of upper hot air ejection outlets are evenly distributed on one side of the upper hot air cavity, and the plurality of lower hot air ejection outlets are evenly distributed on one side of the lower hot air cavity.
8. The drying device of the single sheet inkjet printer according to claim 6, characterized in that: The upper port and the lower port of the upper hot air chamber have the same caliber, and both are smaller than the inner diameter of the cylinder; the upper port and the lower port of the lower hot air chamber have the same caliber, and both are smaller than the inner diameter of the cylinder.
9. The drying device of a single sheet inkjet printer according to claim 1, characterized in that: The upper flip lower paper feeding channel and the lower flip upper paper feeding channel are both connected to a paper conveying structure, which includes a conveyor belt for conveying paper, a driving wheel and a driven wheel connected to the conveyor belt, and a driving motor for driving the driving wheel to rotate. The driving motor can rotate forward and reverse alternately to drive the paper to move back and forth on the conveyor belt.