Ink scraping mechanism of plastic protective film roll printing device

By designing the ink scraping assembly in the plastic protective film roller printing device, the reciprocating and transverse scraping of the ink is achieved, and the problem of scraping the ink scraping knife in the prior art is solved, and the practicality of the equipment and the scraping efficiency are improved.

CN222819766UActive Publication Date: 2025-05-02HENAN LIFAN NEW MATERIALS CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421987824.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-16
Publication Date
2025-05-02
Estimated Expiration
2034-08-16

AI Technical Summary

Technical Problem

In the existing roller printing equipment, the ink scraper may be pressed and bent when the roller rotates, resulting in scrapping and wear of the ink scraper, which reduces the practicality of the equipment.

Method used

A plastic protective film roller printing device is designed, including an ink scraping assembly, which realizes rapid reciprocating and transverse scraping of the ink in the pressure roller assembly through components such as a second threaded rod, a turntable, a U-shaped box, a reciprocating screw rod, an electric telescopic rod and an arc-shaped knife.

Benefits of technology

It effectively prevents the ink scraping knife from being scraped due to vertical scraping, improves the ink scraping efficiency, and increases the practicality of the equipment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222819766U_ABST
    Figure CN222819766U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of ink scraping, and discloses an ink scraping mechanism of a plastic protective film roll printing device, which comprises a working frame, a compression roller component arranged in the working frame, a limiting component arranged at the top of the inner wall of the working frame, and an ink printing component arranged at the bottom of the compression roller component and positioned in the working frame, a drying assembly is arranged at the bottom of the inner wall of the working frame, and an ink scraping assembly is arranged at the bottom of the inner wall of the working frame and located on the side, away from the drying assembly, of the pressing roller assembly. By arranging the ink scraping assembly, ink on a first roller wheel in the pressing roller assembly can be rapidly scraped in a reciprocating transverse mode, the problem that when a blade vertically scrapes the ink, the unsealed end of the blade is prone to tilting, and consequently the blade is scraped is solved, and the ink scraping efficiency is improved; and by arranging the pressing roller assembly, a first roller wheel in the pressing roller assembly can be conveniently colored, by arranging the pressing roller assembly, the plastic protective film can be conveniently embossed and colored, and the practicability of the equipment is improved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of ink scraping, and more specifically to an ink scraping mechanism of a plastic protective film roller printing device. Background Art

[0002] PE protective film, that is, plastic protective film, is the simplest macromolecular organic compound and the most widely used macromolecular material in the world today. PE protective film uses special polyethylene (PE) plastic film as the base material and is divided into high-density polyethylene protective film, medium-density polyethylene and low-density polyethylene according to different densities.

[0003] The shortcomings of the prior art: In the existing roller printing equipment, a scraper is usually used to scrape the ink on the roller in the equipment. However, during the scraping process, because the scraper is fixed horizontally and the roller is rotating, the unsealed end of the scraper may be bent by pressure, causing the scraper to be scrapped, increasing the wear of the scraper, reducing the practicability of the equipment, and being unfavorable for actual application and operation. For this reason, we propose a scraping mechanism for a plastic protective film roller printing device. Utility Model Content

[0004] In order to overcome the above defects of the prior art, the utility model provides an ink scraping mechanism of a roller printing device for a plastic protective film to solve the problems existing in the above background technology.

[0005] The utility model provides the following technical solution: an ink scraping mechanism of a roller printing device for a plastic protective film, comprising a working frame, a pressure roller assembly is arranged inside the working frame, a limiting assembly is arranged on the top of the inner wall of the working frame, an ink printing assembly is arranged at the bottom of the pressure roller assembly and located inside the working frame, a drying assembly is arranged at the bottom of the inner wall of the working frame, and an ink scraping assembly is arranged at the bottom of the inner wall of the working frame and located on a side of the pressure roller assembly away from the drying assembly;

[0006] The ink scraping assembly includes a second threaded rod, a rotating disk, a second U-shaped box, a reciprocating screw rod, a fourth slider, an electric telescopic rod, an arc knife, a second slider, a third slide groove and a fifth slide groove. The third slide groove is arranged on both sides of the inner wall of the working frame, the fifth slide groove is arranged on the outer side of the working frame, the fifth slide groove is communicated with one of the third slide grooves, the second sliders are slidably connected to the inside of the third slide groove, the second U-shaped box is fixedly installed between the two second sliders, the reciprocating screw rod is rotatably connected to the inside of the second U-shaped box, one end of the reciprocating screw rod sequentially passes through the second U-shaped box, the second slider and the fifth slide groove and extends to the outside of the working frame, the fourth slider is threadedly connected to the outside of the reciprocating screw rod, the electric telescopic rod is fixedly installed on one side of the fourth slider, the arc knife is fixedly installed on the piston rod of the electric telescopic rod, the second threaded rod is threadedly connected to the bottom of the inner wall of the working frame, the top end of the second threaded rod is rotatably connected to the bottom of the second U-shaped box, and the rotating disk is fixedly installed on the bottom end of the second threaded rod.

[0007] The cam is connected with the second end of the second cam and the second end of the second cam is connected with the cam in a forward direction, and the cam is connected with the second end of the second cam by the spring, so that the cam can move relative to the first end of the second cam and the second end of the second cam is connected with the cam in a forward direction.

[0008] Preferably, the ink scraper assembly also includes a fourth slide groove and a third slider, the fourth slide groove is opened on one side of the inner wall of the second U-shaped box, the third slider is slidably connected inside the fourth slide groove, and the side of the third slider away from the fourth slide groove is fixedly connected to the side of the fourth slider away from the electric telescopic rod.

[0009] Preferably, the limiting assembly includes an L-shaped plate, a first threaded rod, a through hole and a second spring, the second spring is opened at the top of the inner wall of the working frame, the first slide groove is communicated with the second spring, the through hole is opened at the top of the inner wall of the working frame and is located on one side of the second spring, the L-shaped plate is fixedly installed on the top of the slide bar, the top end of the L-shaped plate passes through the interior of the second spring and extends to the outside of the working frame, the first threaded rod is threadedly connected to the inside of the L-shaped plate away from the slide bar, and the first threaded rod and the through hole cooperate with each other.

[0010] Preferably, the ink assembly comprises round blocks and a first U-shaped box, the round blocks are fixedly mounted on the inner side of the first fixed plate, and the first U-shaped box is fixedly mounted between the two round blocks and located below the first roller.

[0011] Preferably, the drying assembly includes a fixing rod, a connecting plate and a heating wire lamp, the fixing rod is fixedly mounted on the bottom of the inner wall of the working frame, the connecting plate is fixedly mounted on the top of the fixing rod, and the heating wire lamp is equidistantly arranged on the top of the connecting plate.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The utility model arranges an ink scraping assembly to facilitate the reciprocating horizontal rapid scraping of ink on the first roller in the pressure roller assembly, thereby preventing the problem of the open end of the blade being easily lifted up when the blade scrapes the ink vertically, thereby improving the efficiency of ink scraping and increasing the practicality of the equipment.

[0014] 2. The utility model provides an ink printing component to facilitate coloring of the first roller in the pressure roller component, provides a pressure roller component to facilitate the effect of embossing and coloring the plastic protective film, provides a drying component to facilitate the effect of drying the ink on the plastic protective film, and provides a limiting component to facilitate the limited movement of the upper structure of the pressure roller component, thereby paving the way for the subsequent operation of the ink scraping component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure inside the working frame of the utility model.

[0017] Figure 3 For the utility model Figure 2 Enlarged view of point A in the middle.

[0018] Figure 4 It is a structural schematic diagram of the ink scraping assembly of the utility model.

[0019] Figure 5It is a structural schematic diagram of the round block and the first U-shaped box of the utility model.

[0020] The accompanying drawings are marked as follows: 1. work frame; 2. first fixed plate; 3. first roller; 4. first slide groove; 5. slide bar; 6. second fixed plate; 7. slide rod; 8. first spring; 9. first slider; 10. second roller; 11. round block; 12. first U-shaped box; 13. second slide groove; 14. L-shaped plate; 15. first threaded rod; 16. through hole; 17. second spring; 18. fixed rod; 19. connecting plate; 20. electric heating wire lamp; 21. third slide groove; 22. second slider; 23. second U-shaped box; 24. fourth slide groove; 25. third slider; 26. reciprocating screw rod; 27. fourth slider; 28. electric telescopic rod; 29. ​​arc knife; 30. second threaded rod; 31. turntable; 32. fifth slide groove; 33. motor. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the new structure involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0022] The utility model provides an ink scraping mechanism of a roller printing device for a plastic protective film, comprising a working frame 1, a pressure roller assembly is arranged inside the working frame 1, a limiting assembly is arranged at the top of the inner wall of the working frame 1, an ink printing assembly is arranged at the bottom of the pressure roller assembly and located inside the working frame 1, a drying assembly is arranged at the bottom of the inner wall of the working frame 1, and an ink scraping assembly is arranged at the bottom of the inner wall of the working frame 1 and located on the side of the pressure roller assembly away from the drying assembly. By arranging the ink printing assembly, it is convenient to color the first roller 3 in the pressure roller assembly, and by arranging the pressure roller assembly, it is convenient to color the plastic protective film In order to achieve the effect of embossing and coloring, a drying component is provided to facilitate the drying of the ink on the plastic protective film, a limiting component is provided to facilitate the limited movement of the upper structure of the pressure roller component, and to pave the way for the subsequent operation of the ink scraping component, and an ink scraping component is provided to facilitate the reciprocating and horizontal rapid scraping of the ink on the first roller 3 in the pressure roller component, thereby preventing the problem of the blade's open end lifting up when the blade scrapes the ink vertically, causing the blade to be scrapped, thereby improving the efficiency of ink scraping, increasing the practicability of the equipment, and being beneficial to actual application and operation.

[0023] Furthermore, the pressure roller assembly includes a first fixed plate 2, a first roller 3, a first slide 4, a slide bar 5, a second fixed plate 6, a slide bar 7, a first spring 8, a first slider 9, a second roller 10, a second slide 13, a motor 33 and a fifth slide 32. The first fixed plate 2 is fixedly mounted at the bottom of the inner wall of the working frame 1, the first roller 3 is rotatably connected between the two first fixed plates 2, the first slide 4 is opened at the top of the inner wall of the working frame 1, the slide bar 5 is slidably connected to the inside of the first slide 4, the two ends of the second slide 13 are respectively fixedly connected to one side of the inner wall of the first slide 4 and one side of the slide bar 5, the second fixed plate 6 is fixedly mounted at the bottom of the slide bar 5, the slide bar 7 is fixedly mounted inside the second fixed plate 6, the first slider 9 is slidably connected to the outside of the slide bar 7, the first spring The springs 8 are all sleeved on the outside of the slide bar 7 and are located between the top of the inner wall of the second fixed plate 6 and the top of the first slider 9. The second roller 10 is rotatably connected between the two first sliders 9. The motor 33 is fixedly installed on the outside of the working frame 1 and is located on one side of the fifth slide groove 32. The output shaft of the motor 33 passes through the inner wall of the working frame 1 and the first fixed plate 2 in sequence and is fixedly connected to one end of the first roller 3. By driving the motor 33, the first roller 3 between the two first fixed plates 2 is driven to rotate. At the same time, the characteristics of the first spring 8 are utilized to drive the first slider 9 on the slide bar 7 to be squeezed and lowered, thereby driving the second roller 10 between the two first sliders 9 to descend, so that the second roller 10 is close to one side of the first roller 3, and the plastic protective film is embossed and colored.

[0024] Furthermore, the ink printing assembly includes a round block 11 and a first U-shaped box 12. The round blocks 11 are fixedly installed on the inner side of the first fixed plate 2. The first U-shaped box 12 is fixedly installed between the two round blocks 11 and is located below the first roller 3. By filling ink into the first U-shaped box 12, it is convenient to color the outer side of the first roller 3.

[0025] Furthermore, the drying assembly includes a fixed rod 18, a connecting plate 19 and an electric heating wire lamp 20. The fixed rod 18 is fixedly installed at the bottom of the inner wall of the work frame 1, the connecting plate 19 is fixedly installed at the top of the fixed rod 18, and the electric heating wire lamp 20 is equidistantly arranged on the top of the connecting plate 19. The electric heating wire lamp 20 is arranged on the connecting plate 19 at the top of the driving fixed rod 18, which facilitates the drying of the colored and embossed plastic protective film.

[0026] Furthermore, the ink scraping assembly includes a second threaded rod 30, a rotating disk 31, a second U-shaped box 23, a reciprocating screw rod 26, a fourth slider 27, an electric telescopic rod 28, an arc knife 29, a second slider 22, a third slide 21, a fourth slide 24 and a third slider 25. The third slide 21 is provided on both sides of the inner wall of the work frame 1, the fifth slide 32 is provided on the outer side of the work frame 1, the fifth slide 32 is communicated with one of the third slides 21, the second slider 22 is slidably connected to the inside of the third slide 21, and the second U-shaped box 23 is provided. The reciprocating screw rod 26 is fixedly installed between the two second sliders 22, and is rotatably connected to the inside of the second U-shaped box 23. One end of the reciprocating screw rod 26 passes through the second U-shaped box 23, the second slider 22 and the fifth slide groove 32 in sequence and extends to the outside of the working frame 1. The fourth slider 27 is threadedly connected to the outside of the reciprocating screw rod 26. The electric telescopic rod 28 is fixedly installed on one side of the fourth slider 27. The arc knife 29 is fixedly installed on the piston rod of the electric telescopic rod 28. The second threaded rod 30 is threadedly connected to the bottom of the inner wall of the working frame 1. The second threaded rod 30 is threadedly connected to the bottom of the inner wall of the working frame 1. The top of the threaded rod 30 is rotatably connected to the bottom of the second U-shaped box 23, the turntable 31 is fixedly installed at the bottom end of the second threaded rod 30, the fourth slide groove 24 is opened on one side of the inner wall of the second U-shaped box 23, the third slider 25 is slidably connected inside the fourth slide groove 24, the side of the third slider 25 away from the fourth slide groove 24 is fixedly connected to the side of the fourth slider 27 away from the electric telescopic rod 28, and the turntable 31 is manually rotated to drive the second threaded rod 30 to rotate, thereby driving the second sliders 22 at both ends of the second U-shaped box 23 to move. The reciprocating screw rod 26 slides upward in the third slide groove 21, and at the same time drives the reciprocating screw rod 26 to slide upward inside the fifth slide groove 32. When it is adjusted to a suitable height, the electric telescopic rod 28 is driven to drive the arc knife 29 to move, so that the arc knife 29 fits with the first roller 3, and then the reciprocating screw rod 26 is manually rotated to drive the fourth slider 27 to slide back and forth, thereby driving the third slider 25 to slide back and forth on the fourth slide groove 24, and then driving the arc knife 29 to reciprocate and laterally scrape the ink on the outer side of the first roller 3.

[0027] Furthermore, the limiting assembly includes an L-shaped plate 14, a first threaded rod 15, a through hole 16 and a second spring 17. The second spring 17 is opened at the top of the inner wall of the working frame 1, the first slide groove 4 is communicated with the second spring 17, the through hole 16 is opened at the top of the inner wall of the working frame 1 and is located on one side of the second spring 17, the L-shaped plate 14 is fixedly installed on the top of the slide bar 5, the top end of the L-shaped plate 14 passes through the interior of the second spring 17 and extends to the outside of the working frame 1, the first threaded rod 15 is threadedly connected to the interior of the L-shaped plate 14 away from the end of the slide bar 5, the first threaded rod 15 and the through hole 16 cooperate with each other, by manually pulling the L-shaped plate 14 inside the second spring 17 and cooperating with the second slide groove 13, the slide bar 5 is driven to slide inside the first slide groove 4, and then the first threaded rod 15 is manually twisted so that the first threaded rod 15 is inserted into the interior of the through hole 16 to achieve the limiting effect.

[0028] The working principle of the utility model is as follows: by utilizing the elastic force of the second slide groove 13, the slide bar 5 is driven to slide inside the first slide groove 4, so that the second fixed plate 6 at the bottom of the slide bar 5 is driven to move, and then the characteristics of the first spring 8 are utilized to drive the first slider 9 on the slide bar 7 to be squeezed and lowered, thereby driving the second roller 10 between the two first sliders 9 to be lowered, so that the second roller 10 is close to one side of the first roller 3 to squeeze the plastic protective film, and the first roller 3 between the two first fixed plates 2 is driven to rotate by the driving motor 33. At the same time, when the first roller 3 rotates, it is colored by the ink in the first U-shaped box 12 to emboss the plastic protective film. At the same time, the connecting plate 19 at the top of the driving fixed rod 18 is provided with an electric heating wire lamp 20 to dry the colored and embossed plastic protective film. When the equipment is not needed, the L-shaped plate 14 is manually pulled inside the second spring 17, and The second slide groove 13 is cooperated with the second slide groove 13 to drive the slide bar 5 to slide leftward inside the first slide groove 4, and then the first threaded rod 15 is manually twisted so that the first threaded rod 15 is inserted into the inside of the through hole 16, which is convenient for the second roller 10 to be offset, and then the turntable 31 is manually rotated to drive the second threaded rod 30 to rotate, thereby driving the second sliders 22 at both ends of the second U-shaped box 23 to slide upward in the third slide groove 21, and at the same time driving the reciprocating screw rod 26 to slide upward inside the fifth slide groove 32. When adjusted to a suitable height, the electric telescopic rod 28 is driven to drive the arc knife 29 to move so that the arc knife 29 is fitted with the first roller 3, and then the reciprocating screw rod 26 is manually rotated to drive the fourth slider 27 to slide back and forth, thereby driving the third slider 25 to slide back and forth on the fourth slide groove 24, and then driving the arc knife 29 to reciprocate and laterally scrape the ink on the outer side of the first roller 3, thereby increasing the practicality of the equipment.

[0029] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0030] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0031] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. An ink scraping mechanism of a plastic protective film roller printing device, comprising a working frame (1), characterized in that: A pressure roller assembly is arranged inside the working frame (1), a limiting assembly is arranged at the top of the inner wall of the working frame (1), an ink assembly is arranged at the bottom of the pressure roller assembly and located inside the working frame (1), a drying assembly is arranged at the bottom of the inner wall of the working frame (1), and an ink scraping assembly is arranged at the bottom of the inner wall of the working frame (1) and located on a side of the pressure roller assembly away from the drying assembly; The ink scraping assembly comprises a second threaded rod (30), a rotating disk (31), a second U-shaped box (23), a reciprocating screw rod (26), a fourth slider (27), an electric telescopic rod (28), an arc knife (29), a second slider (22), a third slide groove (21) and a fifth slide groove (32), wherein the third slide groove (21) is arranged on both sides of the inner wall of the working frame (1), the fifth slide groove (32) is arranged on the outer side of the working frame (1), the fifth slide groove (32) is communicated with one of the third slide grooves (21), the second slider (22) is slidably connected to the inside of the third slide groove (21), the second U-shaped box (23) is fixedly installed between the two second sliders (22), the reciprocating screw rod (26) is rotat ... reciprocating screw rod (26) is rotatably connected to the inside of the third slide groove (21), the reciprocating screw rod (26) is rotatably connected to the inside of the third slide groove (21), the reci The electric telescopic rod (28) is connected to the inside of the second U-shaped box (23), one end of the reciprocating screw rod (26) passes through the second U-shaped box (23), the second slider (22) and the fifth slide groove (32) in sequence and extends to the outside of the working frame (1), the fourth slider (27) is threadedly connected to the outside of the reciprocating screw rod (26), the electric telescopic rod (28) is fixedly installed on one side of the fourth slider (27), the arc knife (29) is fixedly installed on the piston rod of the electric telescopic rod (28), the second threaded rod (30) is threadedly connected to the bottom of the inner wall of the working frame (1), the top end of the second threaded rod (30) is rotatably connected to the bottom of the second U-shaped box (23), and the turntable (31) is fixedly installed at the bottom end of the second threaded rod (30).

2. The ink scraping mechanism of the roller printing device for plastic protective film according to claim 1, characterized in that: The pressure roller assembly comprises a first fixed plate (2), a first roller (3), a first slide groove (4), a slide bar (5), a second fixed plate (6), a slide rod (7), a first spring (8), a first slider (9), a second roller (10), a second slide groove (13) and a motor (33), wherein the first fixed plate (2) is fixedly mounted at the bottom of the inner wall of the working frame (1), the first roller (3) is rotatably connected between the two first fixed plates (2), the first slide groove (4) is provided at the top of the inner wall of the working frame (1), the slide bar (5) is slidably connected inside the first slide groove (4), and the two ends of the second slide groove (13) are respectively fixedly connected to one side of the inner wall of the first slide groove (4) and one side of the slide bar (5), The second fixed plate (6) is fixedly mounted on the bottom of the slide bar (5), the slide bar (7) is fixedly mounted inside the second fixed plate (6), the first slider (9) is slidably connected to the outside of the slide bar (7), the first spring (8) is sleeved on the outside of the slide bar (7) and is located between the top of the inner wall of the second fixed plate (6) and the top of the first slider (9), the second roller (10) is rotatably connected between the two first sliders (9), the motor (33) is fixedly mounted on the outside of the working frame (1) and is located on one side of the fifth slide groove (32), and the output shaft of the motor (33) passes through the inner wall of the working frame (1) and the first fixed plate (2) in sequence and is fixedly connected to one end of the first roller (3).

3. The ink scraping mechanism of the roller printing device for plastic protective film according to claim 1, characterized in that: The ink scraping assembly further comprises a fourth slide groove (24) and a third slider (25), wherein the fourth slide groove (24) is provided on one side of the inner wall of the second U-shaped box (23), the third slider (25) is slidably connected inside the fourth slide groove (24), and a side of the third slider (25) away from the fourth slide groove (24) is fixedly connected to a side of the fourth slider (27) away from the electric telescopic rod (28).

4. The ink scraping mechanism of the roller printing device for plastic protective film according to claim 2, characterized in that: The limiting assembly comprises an L-shaped plate (14), a first threaded rod (15), a through hole (16) and a second spring (17); the second spring (17) is arranged at the top of the inner wall of the working frame (1); the first slide groove (4) is communicated with the second spring (17); the through hole (16) is arranged at the top of the inner wall of the working frame (1) and is located on one side of the second spring (17); the L-shaped plate (14) is fixedly mounted on the top of the slide bar (5); the top end of the L-shaped plate (14) passes through the inside of the second spring (17) and extends to the outside of the working frame (1); the first threaded rod (15) is threadedly connected to the inside of the end of the L-shaped plate (14) away from the slide bar (5); the first threaded rod (15) and the through hole (16) cooperate with each other.

5. The ink scraping mechanism of the roller printing device for plastic protective film according to claim 2, characterized in that: The ink printing assembly comprises a round block (11) and a first U-shaped box (12), wherein the round blocks (11) are fixedly mounted on the inner side of the first fixed plate (2), and the first U-shaped box (12) is fixedly mounted between the two round blocks (11) and is located below the first roller (3).

6. The ink scraping mechanism of the roller printing device for plastic protective film according to claim 1, characterized in that: The drying assembly comprises a fixing rod (18), a connecting plate (19) and an electric heating wire lamp (20); the fixing rod (18) is fixedly mounted on the bottom of the inner wall of the working frame (1); the connecting plate (19) is fixedly mounted on the top of the fixing rod (18); and the electric heating wire lamp (20) is equidistantly arranged on the top of the connecting plate (19).