Printing equipment capable of scraping dry ink for packaging box printing

Abstract

The invention belongs to the related technical field of printing, and particularly discloses a printing device capable of scraping dry ink for packaging box printing, the printing device comprises a rack and a printing machine main body installed on the upper portion in the rack, an ink box is arranged in the rack and close to the lower portion of the printing machine main body, and a U-shaped frame is erected on the outer side of one end of the rack; the two sides of the upper end face of the U-shaped frame are correspondingly connected with mounting tables through correspondingly-arranged lifting mechanisms, the outer walls of one ends of the two mounting tables are jointly connected with a clamping shaft through correspondingly-arranged mounting pieces, the outer side of the clamping shaft is sleeved with a roller, a lead screw is rotationally arranged between the two mounting tables, and a sliding frame is arranged outside the lead screw. The ink scraping device for the printing machine is mainly used for cleaning stubborn ink on the surface of a printing roller on the printing machine so as to ensure the printing quality and normal operation of equipment.

Description

Technical Field

[0001] The invention belongs to the technical field related to printing, and particularly discloses a printing device capable of scraping off dry ink for packaging box printing. Background Art

[0002] A food packaging box is a container used to package and protect food. It is usually made of a variety of materials to meet the storage needs of different foods. The main function of a food packaging box is to protect food from the influence of the external environment, such as oxygen, moisture, light and microorganisms, thereby extending the shelf life of the food.

[0003] The specifications of food packaging boxes vary and are adjusted accordingly according to the required food carrying capacity. Existing food packaging boxes generally use a printing machine to print exquisite patterns on the surface of the food packaging box. There are many existing printing methods, including silk screen printing, pad printing, gravure printing, etc.

[0004] Existing ink scraping is done manually. If the outer surface of the printing cylinder is not cleaned in time and dried ink remains on the outer surface of the printing cylinder, it will increase the burden of later cleaning. Most cleaning methods only clean the outer surface of the printing cylinder. The outer surface of the shaft installed inside to rotate the printing cylinder will be blocked with the bearing seat due to the flow of ink, thereby affecting the rotation of the printing cylinder. Therefore, we need to improve it. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the background technology, and a printing device for scraping dry ink for packaging box printing is proposed, which includes a frame and a printing machine body installed above the inside of the frame, an ink tank is arranged inside the frame and near the bottom of the printing machine body, a U-shaped frame is arranged on the outside of one end of the frame, and both sides of the upper end surface of the U-shaped frame are connected to the mounting platform through a corresponding lifting mechanism, the outer walls of one end of the two groups of mounting platforms are connected to a clamping shaft through a corresponding mounting piece, a roller is mounted on the outside of the clamping shaft, a screw is rotatably arranged between the two groups of mounting platforms, a slide is arranged on the outside of the screw, and a slider is slidably connected to the outside of the slider through an adjusting piece, and an ink scraping mechanism is arranged on the outside of the slider.

[0006] Preferably, the lifting mechanism includes a cylinder installed on the upper end surface of the U-shaped frame, the telescopic end of the cylinder is fixedly connected to the bottom of the mounting platform, the lower end of the slide is slidably connected to the inner edge of the U-shaped frame, and a second motor is fixedly installed at one end of the screw rod, and the second motor is fixedly installed on the outside of one group of mounting platforms.

[0007] Preferably, the mounting member includes a rack rod fixedly arranged on the outside of one end of the mounting platform, the rack rod is sleeved on the outside of the clamping shaft, one end of the clamping shaft is connected to a first motor, and the first motor is fixedly mounted on the outer wall of one of the rack rods.

[0008] Preferably, the adjusting member includes a screw rod rotatably mounted inside one end of the slide, and the slider is threadedly connected to the screw rod.

[0009] Preferably, the ink scraping mechanism includes an electric push cylinder fixedly arranged on the outside of the slider, a fixed plate is fixedly installed on the telescopic end of the electric push cylinder, a connecting shaft is fixedly arranged on the end of the fixed plate away from the electric push cylinder, and a counter-rotating scraping strip is fixedly arranged on the end of the connecting shaft, and the counter-rotating scraping strip is movably abutted against the outer surface of the roller.

[0010] The cam is fixedly provided with a first spring, and the second spring is fixedly provided with a first end in a forward direction of the sliding sleeve, and the second end in a reverse direction of the sliding sleeve is fixedly provided with a first spring, and the second end in a reverse direction of the sliding sleeve is fixedly provided with a first spring, and the second end in a reverse direction of the sliding sleeve

[0011] Preferably, the rotating part includes a third motor fixedly mounted on one side of the card box, the output end of the third motor extends to the inside of the card box, a gear is fixedly provided on the outside of the output end of the third motor, a rack is meshed and connected to one side of the gear, the rack is fixedly connected to the mounting block, and the rack is slidably fitted with the card box.

[0012] Preferably, an inkjet tube is provided inside the ink tank and at one end away from the U-shaped frame, and support rods are provided at both ends of the inkjet tube. The two support rods are rotatably matched with the inside of the ink tank, and the outer edges of the support rods are correspondingly connected to the clamping rods through the provided tension springs. The ends of the two clamping rods away from the support rods are fixedly sleeved with fixing rods, and the two fixing rods are fixedly connected to the outside of the frame. A plurality of heat preservation and heating tubes are installed at the lower part of the ink tank, and a delivery pipe for delivering ink is installed at the lower part of the inkjet tube, and the delivery pipe extends to the inside of the ink tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Through the provided lifting parts and screws, the position of the external counter-rotating scraper can be adjusted according to the position of the drum, making the drum more flexible during future maintenance. The position of the drum can be adjusted during maintenance, making it easier to free up maintenance space during later disassembly and assembly.

[0015] 2. The scraping mechanism is set up and the scraping bar with a counter-rotating shape can help the roller to better clean the dried ink on the outside. Compared with the conventional flat scraping bar, it can more evenly contact the outer surface of the roller, which can effectively reduce the phenomenon of missed scraping or unclean scraping during the scraping process and reduce streaks. Conventional flat scraping bars are very likely to produce streaks and marks when scraping ink. The counter-rotating scraping bar has its own rotating design, which can more evenly disperse the pressure and reduce the generation of streaks. In addition, it also reduces the wear on the roller and is more suitable for stubborn dry ink. The dynamic scraping effect can scrape more effectively.

[0016] 3. By setting the first spring, the first block, the second spring, the second block, the turntable, the fixed plate and the pin rod, while cooperating to scrape the ink from the roller, the excess ink on the outer surface of the card shaft can also be cleaned. The use of this elastic contact method is more suitable for more shaft components, so that the ink will not penetrate too much into the bearing seat, avoiding the problem of clogging of the bearing seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 This is a partial structural cross-sectional view of the ink tank of the present invention;

[0019] Figure 3 Schematic diagram of the connection structure between the U-shaped frame and the scraping mechanism of the present invention;

[0020] Figure 4 This is a schematic diagram of the connection between the roller and the scraping mechanism of the present invention;

[0021] Figure 5 This is a schematic diagram showing the connection between the roller and the ink scraping mechanism of the present invention from another angle;

[0022] Figure 6 This is a schematic diagram of the connection structure between the card box, the gear and the rack of the present invention;

[0023] Figure 7 For the present invention Figure 5 A schematic diagram of the structure at center A;

[0024] Figure 8 It is a schematic diagram of the partial connection structure between the slider and the carriage of the present invention.

[0025] Figure: 1, frame; 2, U-shaped frame; 3, ink tank; 4, lead screw; 5, carriage; 6, cylinder; 7, screw; 8, printer body; 9, mounting platform; 10, inkjet tube; 11, roller; 12, support rod; 13, tension spring; 14, fixing rod; 15, clamping rod; 16, delivery tube; 17, heat preservation and heating tube; 18, slider; 19, counter-rotating scraper; 20, first motor; 21, second motor ; 22. Turntable; 23. Pin rod; 24. Electric push cylinder; 25. Fixed plate; 26. Third motor; 27. Card box; 28. Card shaft; 29. Slide; 30. Rack; 31. Mounting rod; 32. Mounting block; 33. Gear; 34. Movable clamp; 35. First stop block; 36. First spring; 37. L-shaped rod; 38. Second stop block; 39. Second spring; 40. Movable rod; 41. Rack rod. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] like Figures 1-8 The printing device for printing packaging boxes with scrapable dry ink shown in the figure comprises a frame 1 and a printer body 8 mounted on the upper part of the frame 1. An ink tank 3 is arranged inside the frame 1 and near the bottom of the printer body 8. A U-shaped frame 2 is arranged on the outside of one end of the frame 1. Both sides of the upper end surface of the U-shaped frame 2 are connected to mounting platforms 9 via corresponding lifting mechanisms. The outer walls of one end of the two sets of mounting platforms 9 are connected to a clamping shaft 28 via corresponding mounting parts. A roller 11 is sleeved on the outer side of the clamping shaft 28. A screw rod 4 is rotatably arranged between the two sets of mounting platforms 9. A slide 5 is arranged on the outside of the screw rod 4. A slider 18 is slidably connected to the outside of the slider 5 via a set adjusting member. An ink scraping mechanism is arranged on the outer side of the slider 18.

[0029] like Figure 1 and Figure 2 As shown, the printing machine body 8 is a partial structure of the printing machine's ink scraping mechanism. In actual operation, it also includes units such as a winding mechanism, a conveying mechanism, and a pressure roller mechanism, which together with the ink scraping mechanism form a complete printing machine equipment.

[0030] The lifting mechanism includes a cylinder 6 mounted on the upper end surface of the U-shaped frame 2, the telescopic end of the cylinder 6 is fixedly connected to the bottom of the mounting platform 9, the lower end of the slide 5 is slidably connected to the inner edge of the U-shaped frame 2, and one end of the screw rod 4 is fixedly mounted with a second motor 21, which is fixedly mounted on the outside of one set of mounting platforms 9;

[0031] like Figure 1 and Figure 2 As shown, the cylinder 6 can drive the mounting platform 9 to move up and down, and the slide 5 can move synchronously with the second motor 21, which can free up more space for the roller 11 during later maintenance;

[0032] Driven by the second motor 21 , the screw rod 4 rotates inside the two sets of mounting platforms 9 , and the slide 5 threadedly connected to the screw rod 4 can move laterally while sliding against the inner edge of the U-shaped frame 2 .

[0033] The mounting member includes a rod 41 fixedly arranged on the outside of one end of the mounting platform 9, the rod 41 is sleeved on the outside of the card shaft 28, one end of the card shaft 28 is connected to the first motor 20, and the first motor 20 is fixedly mounted on the outer wall of one of the rods 41;

[0034] like Figure 1 、 Figure 2 and Figure 3 As shown, under the connection of the frame rod 41, the card shaft 28 can be stably set above the inside of the ink tank 3 for operation, and the first motor 20 can drive the card shaft 28 to rotate, which can prompt the roller 11 to cooperate with the conveying roller of the printing machine body 8, so that the packaging box conveyed by it can be printed with ink.

[0035] The adjusting member includes a screw rod 7 rotatably mounted inside one end of the slide 5, and a slider 18 is threadedly connected to the screw rod 7;

[0036] like Figure 1 、 Figure 2 and Figure 3 As shown, the user can rotate the screw 7 to drive the slider 18 to move up and down, and the position of the ink scraping mechanism can be adjusted during use later.

[0037] The ink scraping mechanism includes an electric push cylinder 24 fixedly arranged on the outside of the slider 18. A fixed plate 25 is fixedly installed on the telescopic end of the electric push cylinder 24. A connecting shaft is fixedly arranged on the end of the fixed plate 25 away from the electric push cylinder 24. A counter-rotating scraping strip 19 is fixedly arranged on the end of the connecting shaft. The counter-rotating scraping strip 19 is movably abutted against the outer surface of the roller 11.

[0038] like Figure 3 and Figure 4 As shown, the electric push cylinder 24 can automatically drive the front fixed plate 25 and the reverse-rotating scraper 19 to move, and when it is close to the roller 11, it prompts the reverse-rotating scraper 19 to perform the ink scraping operation, and when it is away from the roller 11, it ensures that the roller 11 can rotate.

[0039] A turntable 22 is rotatably installed on the outside of the connecting shaft, and a plurality of groups of limiting holes are provided inside the turntable 22 at equal distances along the circumferential direction. A pin rod 23 is slidably inserted into the interior of the fixed disk 25, and one end of the pin rod 23 extends to the inside of one group of limiting holes. A card box 27 is fixedly provided on the outside of the turntable 22, and a mounting block 32 is connected to the inside of the card box 27 through a rotating member provided. A mounting rod 31 is fixedly inserted into the inside of the mounting block 32, and a slide cylinder 29 is slidably installed on the outside of the mounting rod 31 away from the mounting block 32. A second spring 39 is installed inside the slide cylinder 29. The second spring The two ends of 39 are respectively connected to the outer wall of the end of the slide 29 and the mounting rod 31 close to each other. A second stop 38 is fixedly provided at the end of the slide 29. An L-shaped rod 37 is fixedly provided on the outer edge of the second stop 38. A movable clamp 34 is slidably installed on the outer side of the L-shaped rod 37. A movable rod 40 is fixedly provided on the outer surface of one end of the movable clamp 34. A first spring 36 is sleeved on the outer side of the movable rod 40. The two ends of the first spring 36 are respectively connected to the outer wall of the end of the movable clamp 34 and the L-shaped rod 37 close to each other. A first stop 35 is fixedly installed on the front edge of the movable clamp 34.

[0040] like Figure 4 、 Figure 5 、 Figure 7 As shown, when the mounting block 32 and the card shaft 28 are located at the same horizontal line, the second stop 38 is pressed by the second spring 39, and the slide 29 and the second stop 38 are quickly pressed against the outer edge of the card shaft 28. At the same time, when the position of the second stop 38 is determined, the first stop 35 is also driven to move toward the card shaft 28 and squeeze the first spring 36 on the outside of the corresponding movable rod 40. Therefore, when the card shaft 28 rotates, the first stop 35 and the second stop 38 can fully contact the outer edge of the card shaft 28, thereby scraping off the excess ink remaining on the outer surface of the card shaft 28.

[0041] The turntable 22 is inserted into the pin rod 23, so that the first block 35 and the second block 38 can be rotated to the other side of the connecting shaft respectively, thereby using the outer edge of the other end of the clamping shaft 28. When the first spring 36 and the second spring 39 are locked, the first block 35 and the second block 38 are sufficient to contact the edge of the other end of the clamping shaft 28.

[0042] The rotating member includes a third motor 26 fixedly mounted on one side of the cartridge 27. The output end of the third motor 26 extends into the interior of the cartridge 27. A gear 33 is fixedly provided on the outside of the output end of the third motor 26. A rack 30 is meshedly connected to one side of the gear 33. The rack 30 is fixedly connected to the mounting block 32, and the rack 30 and the cartridge 27 are in sliding engagement.

[0043] like Figure 4 、 Figure 5 and Figure 6As shown, the rotation drive of the third motor 26 can make the gear 33 outside the output end engage with the rack 30, and move up and down inside the card box 27 under the sliding cooperation of the rack 30 and the card box 27, so that the mounting block 32 is placed above and below the drum 11, causing the first stop block 35 and the second stop block 38 outside the mounting block 32 to be higher than the upper and lower cross-sections of the drum 11, ensuring that the anti-rotating scraper 19 will not hinder movement during use.

[0044] An inkjet tube 10 is provided inside the ink tank 3 at one end away from the U-shaped frame 2. Support rods 12 are provided at both ends of the inkjet tube 10. The two support rods 12 are rotatably matched with the inside of the ink tank 3, and the outer edges of the support rods 12 are connected to corresponding clamping rods 15 through a tension spring 13. The ends of the two clamping rods 15 away from the support rods 12 are fixedly sleeved with fixing rods 14, and the two fixing rods 14 are fixedly connected to the outside of the frame 1. A plurality of heat preservation and heating tubes 17 are installed below the inside of the ink tank 3. A delivery tube 16 for delivering ink is installed below the inside of the inkjet tube 10, and the delivery tube 16 extends into the inside of the ink tank 3.

[0045] like Figure 1 and Figure 2 As shown, under the connection of the support rod 12 and the tension spring 13, the inkjet tube 10 can align the nozzle with the position of the roller 11 to spray, and when the printing machine body 8 and the roller 11 start printing, the ink is sprayed toward the outer surface of the roller 11;

[0046] When delivering ink, the delivery tube 16 is connected to an external delivery pump and placed inside the ink tank 3 , and automatically delivers the ink inside the ink tank 3 to the inside of the inkjet tube 10 .

[0047] Working principle: When the device is in use, the ink inside the ink tank 3 is sucked through the inkjet tube 10 above one end of the ink tank 3, and then sprayed to the outer surface of the roller 11 through the nozzle, so that the roller 11 can print a mark with a pattern on the outer surface of the packaging box being transported;

[0048] When the reverse-rotating scraper 19 is scraping ink, the slider 18 is adjusted to a height corresponding to the roller 11 by rotating the screw 7. The corresponding reverse-rotating scraper 19 is arranged parallel to the roller 11. Under the telescopic drive of the electric push cylinder 24, the reverse-rotating scraper 19 approaches the roller 11, and the inner arc surface contacts the outer surface of the roller 11. Driven by the second motor 21, the slide 5 drives the reverse-rotating scraper 19 to translate laterally during the rotation of the roller 11, and the arc surface is used to scrape it. During the contact process, the ink is guided downward from the lower end of the reverse-rotating scraper 19 to drip into the ink tank 3. In addition, the reverse-rotating scraper 19 is more suitable for scraping dry ink. The arc contact surface becomes larger, and the arc section can be tangent to the dry ink as the roller 11 rotates, thereby scraping the dry ink efficiently and evenly.

[0049] When scraping ink from the roller 11, the third motor 26 drives the gear 33 inside the cartridge 27 to rotate, causing the corresponding meshing rack 30 to move up and down, and the mounting rod 31 and the second stop 38 to move away from the card shaft 28, thereby preventing the counter-rotating scraper 19 from being blocked on one side when scraping ink from the roller 11;

[0050] After the roller 11 has finished scraping, it stops at one end of the card shaft 28, and the mounting rod 31 is moved to the opposite side of the card shaft 28. The mounting rod 31 is elastically pressed by the second spring 39, so that the second block 38 fits against the edge of the card shaft 28, and the corresponding first block 35 is also pressed against the edge of the card shaft 28 and the bearing seat on the outside of the second block 38 under the pressure of the movable clamp 34 and the first spring 36. When the card shaft 28 drives the roller 11 to rotate, the first block 35 and the second block 38 are pressed against the outer edge of the card shaft 28 to scrape off the excess ink and reduce the ink from penetrating into the inside of the bearing seat, thereby ensuring the rotation of the card shaft 28. The cleaning work of the outer surfaces of both ends of the card shaft 28 is solved by rotating the turntable 22 and adjusting the position of the card boxes 27 on both sides.

[0051] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the invention as claimed.

Claims

1. A printing device for packaging box printing capable of scraping off dry ink, comprising a frame (1) and a printing machine body (8) mounted above the inner portion of the frame (1), characterized in that: An ink tank (3) is provided inside the frame (1) and near the bottom of the printer body (8); a U-shaped frame (2) is provided on the outside of one end of the frame (1); both sides of the upper end surface of the U-shaped frame (2) are connected to mounting platforms (9) via corresponding lifting mechanisms; the outer walls of one end of the two groups of mounting platforms (9) are connected to a clamping shaft (28) via corresponding mounting parts; a roller (11) is sleeved on the outer side of the clamping shaft (28); a screw rod (4) is rotatably provided between the two groups of mounting platforms (9); a slide (5) is provided on the outside of the screw rod (4); a slider (18) is slidably connected to the outside of the slider (5) via a setting adjustment part; an ink scraping mechanism is provided on the outer side of the slider (18).

2. The printing device capable of scraping off dry ink for packaging box printing according to claim 1, characterized in that: The lifting mechanism comprises a cylinder (6) mounted on the upper end surface of the U-shaped frame (2); the telescopic end of the cylinder (6) is fixedly connected to the bottom of the mounting platform (9); the lower end of the slide (5) is slidably connected to the inner edge of the U-shaped frame (2); a second motor (21) is fixedly mounted on one end of the screw rod (4); and the second motor (21) is fixedly mounted on the outside of one of the mounting platforms (9).

3. The printing device capable of scraping off dry ink for packaging box printing according to claim 1, characterized in that: The mounting member comprises a rack rod (41) fixedly arranged on the outside of one end of the mounting platform (9), the rack rod (41) being sleeved on the outside of the clamping shaft (28), one end of the clamping shaft (28) being connected to a first motor (20), and the first motor (20) being fixedly mounted on the outer wall of one of the rack rods (41).

4. The printing device capable of scraping off dry ink for packaging box printing according to claim 1, characterized in that: The adjusting member comprises a screw rod (7) rotatably mounted inside one end of the slide (5), and the slider (18) is threadedly connected to the screw rod (7).

5. The printing device capable of scraping off dry ink for packaging box printing according to claim 3, characterized in that: The ink scraping mechanism comprises an electric push cylinder (24) fixedly arranged on the outside of the slider (18); a fixed disk (25) is fixedly installed on the telescopic end of the electric push cylinder (24); a connecting shaft is fixedly arranged on the end of the fixed disk (25) away from the electric push cylinder (24); a counter-rotating scraping strip (19) is fixedly arranged on the end of the connecting shaft; and the counter-rotating scraping strip (19) is movably abutted against the outer surface of the roller (11).

6. The printing device capable of scraping off dry ink for packaging box printing according to claim 5, characterized in that: A turntable (22) is rotatably mounted on the outside of the connecting shaft, and a plurality of limit holes are provided at equal distances in the circumferential direction inside the turntable (22), a pin rod (23) is slidably inserted into the inside of the fixed disk (25), and one end of the pin rod (23) extends to the inside of one of the limit holes, a card box (27) is fixedly arranged on the outside of the turntable (22), and a mounting block (32) is connected to the inside of the card box (27) through a rotating member, a mounting rod (31) is fixedly inserted into the inside of the mounting block (32), and a slide cylinder (29) is slidably mounted on the outside of the end of the mounting rod (31) away from the mounting block (32), and a second spring (39) is installed inside the slide cylinder (29), and the second spring The two ends of the spring (39) are respectively connected to the outer wall of the end of the slide (29) and the mounting rod (31) close to each other, and a second stop block (38) is fixedly provided at the end of the slide (29), and an L-shaped rod (37) is fixedly provided on the outer edge of the second stop block (38). A movable clamp (34) is slidably installed on the outer side of the L-shaped rod (37), and a movable rod (40) is fixedly provided on the outer surface of one end of the movable clamp (34). A first spring (36) is sleeved on the outer side of the movable rod (40), and the two ends of the first spring (36) are respectively connected to the outer wall of the end of the movable clamp (34) and the L-shaped rod (37) close to each other, and a first stop block (35) is fixedly provided on the front edge of the movable clamp (34).

7. The printing device capable of scraping off dry ink for packaging box printing according to claim 6, characterized in that: The rotating member includes a third motor (26) fixedly mounted on one side of the cartridge (27), an output end of the third motor (26) extending into the interior of the cartridge (27), a gear (33) fixedly arranged on the outside of the output end of the third motor (26), a rack (30) meshingly connected to one side of the gear (33), a fixed connection between the rack (30) and the mounting block (32), and a sliding fit between the rack (30) and the cartridge (27).

8. The printing device capable of scraping off dry ink for packaging box printing according to claim 1, characterized in that: An inkjet tube (10) is provided inside the ink tank (3) and at one end away from the U-shaped frame (2). Support rods (12) are provided at both ends of the inkjet tube (10). The two support rods (12) are rotatably matched with the inside of the ink tank (3), and the outer edges of the support rods (12) are connected to corresponding clamping rods (15) through a tension spring (13). The ends of the two clamping rods (15) away from the support rods (12) are fixedly sleeved with fixed rods (14). The two fixed rods (14) are fixedly connected to the outside of the frame (1). A plurality of heat preservation and heating tubes (17) are installed below the inside of the ink tank (3). A delivery tube (16) for delivering ink is installed below the inside of the inkjet tube (10), and the delivery tube (16) extends to the inside of the ink tank (3).

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