Code spraying printing machine

Abstract

The utility model discloses a code-spraying printing machine, which relates to the field of printing equipment, and is characterized in that a leveling device is arranged at a position where a code needs to be sprayed on the surface of a printing medium and is arranged on the upstream side of a spray head, and the printing medium running at a high speed is leveled by the leveling device firstly; and then, a spraying head in the spraying device performs code spraying operation on the position where the two-dimensional code needs to be sprayed, so that the spraying effect of the two-dimensional code on the surface of the printing medium is improved.

Description

Technical Field

[0001] The utility model relates to the field of printing equipment, in particular to a high-speed inkjet printer. Background Art

[0002] The inkjet printer can perform inkjet coding on the surface of the printing medium while the printing medium is running at high speed. Paper is a common printing medium. When the inkjet coding is performed on its surface, the paper edges will stretch due to moisture, while the middle part of the paper remains the same or changes little, resulting in wrinkles on the edges of the paper. These wrinkles are collectively called ruffles. Taking the printing of QR codes as an example, when the position where the coding needs to be done is at the edge of the paper, the ruffles will not only scratch the nozzle, resulting in the inability to form a clear QR code on the surface of the printing medium, but also the ruffles of the paper will cause the QR code to be deformed after spraying, thereby reducing the spraying quality of the QR code on the paper surface. Utility Model Content

[0003] The purpose of the utility model is to provide a code inkjet printer to solve the problems existing in the above-mentioned prior art, reduce the influence of the deformation of the printing medium on the printing quality of the two-dimensional code, and ensure the printing quality of the two-dimensional code when the printing medium runs at high speed.

[0004] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a jet coding printer, the spraying device includes a nozzle, a bracket, and a guide roller. The bracket is fixedly arranged on the frame of the jet coding printer, the nozzle is arranged on the downstream side of the frame, and the leveling device is arranged on the upstream side. The leveling device can level the printing medium.

[0005] Furthermore, the inkjet printer also includes a feeding device, a tension control unit, a correction device, an image detection unit and a discharge device. The tension control unit is provided with a water-cooled traction device, a spraying device is provided above the correction device, and the spraying device is provided downstream of the correction device. A UV drying device is provided above the correction device, and the UV drying device is provided downstream of the spraying device. An image detection unit is provided downstream of the UV drying device.

[0006] Furthermore, the number of the spraying devices is no less than two groups, and the spraying devices are arranged in parallel perpendicular to the running direction of the printing medium.

[0007] Furthermore, the leveling device includes a driving device, a support arm, and a roller. The driving device is arranged on the bracket, the output end of the driving device is connected to one end of the support arm and drives the support arm to rotate, and the other end of the support arm is connected to the rotating shaft of the roller.

[0008] Furthermore, the length of the support arm enables the roller to abut against the surface of the guide roller.

[0009] Furthermore, the outer side surface of the roller is covered with a rubber layer.

[0010] Furthermore, a cooling device is provided at the output end of the feeding device. The cooling device is provided below the printing medium, and the cooling device can generate a cooling airflow toward the printing medium.

[0011] Furthermore, the cooling airflow flows in a vertical direction.

[0012] Furthermore, the cooling device is a fan, which includes fan blades and a support frame. The support frame is horizontally arranged on the frame, and the fan blades are arranged on a side of the support frame facing the printing medium.

[0013] Furthermore, a first ear plate is provided on the opposite side of the support frame where the fan blades are provided, and a fourth through hole is provided on the first ear plate. The support frame is rotatably connected to the output end of the cylinder through the fourth through hole. A fifth through hole is provided at the fixed end of the cylinder, and is rotatably connected to the frame through the fifth through hole. A second ear plate is provided on the side of the support frame close to the frame, and a third through hole is provided on the second ear plate. The support frame is rotatably connected to the frame through the third through hole.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] In this application, a leveling device is provided at the position where the code needs to be sprayed on the surface of the printing medium, and the leveling device is provided upstream of the nozzle. The high-speed running printing medium is first leveled by the leveling device to make the wrinkles at the position where the QR code needs to be sprayed on the printing medium smoothed out again, and then the nozzle in the spraying device performs the coding operation at the position where the QR code needs to be sprayed, thereby improving the spraying effect of the QR code on the surface of the printing medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of the inkjet printer disclosed in an embodiment of the present utility model;

[0018] Figure 2 This is a structural schematic diagram of a spraying device provided with a leveling device in an inkjet printer disclosed in an embodiment of the present utility model;

[0019] Figure 3 This is a structural diagram of a leveling device in an inkjet printer disclosed in an embodiment of the present utility model;

[0020] Figure 4 This is a schematic top view of the overall structure of the cooling device in the inkjet printer disclosed in an embodiment of the present utility model;

[0021] Figure 5 This is a schematic side view of the frame structure of the cooling device in the inkjet printer disclosed in an embodiment of the present utility model;

[0022] Among them, 1. frame; 2. feeding device; 3. tension control unit; 30. water-cooled traction device; 4. correction device; 5. spraying device; 50. bracket; 51. nozzle; 6. UV drying device; 7. image detection unit; 8. discharging device; 9. guide roller; 10. cooling device; 100. fan blade; 101. supporting frame; 1010. third through hole; 1011. fourth through hole; 1012. cylinder; 1013. fifth through hole; 11. leveling device; 110. supporting arm; 111. first through hole; 112. second through hole; 113. rotating shaft; 114. rubber layer; 115. roller. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The purpose of the utility model is to provide a code-jet printer to solve the problems existing in the prior art and improve the spraying effect of a two-dimensional code on the surface of a printing medium under a high-speed running state.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] The inkjet printer includes a feeding device 2, a tension control unit 3, a correction device 4, a spraying device 5, a UV drying device 6, an image detection unit 7 and a discharge device 8. A cooling device 10 is provided in the feeding device 2. The cooling device 10 is arranged below the printing medium. The printing medium enters the inkjet printer from the feeding device 2. In this state, the side of the printing medium on which the QR code needs to be sprayed faces the ground. Therefore, the cooling device 10 is arranged at the bottom of the feeding device 2, and the cooling device 10 can generate a cooling airflow blowing toward the surface of the printing medium to cool the surface of the printing medium and prepare for the subsequent spraying of the QR code.

[0027] The printing medium continues to run in the inkjet printer, passing through the tension control unit 3, which is equipped with a water-cooled traction device 30. While controlling the tension of the printing medium itself, the printing medium is further cooled. The printing medium then enters the correction device 4, which adjusts the relative position of the printing medium on the guide roller 9, and adjusts the position on the printing medium surface where the QR code needs to be sprayed to the correct position to ensure the accuracy of the QR code spraying.

[0028] The printing medium that has passed through the correction device 4 moves to the spraying device 5 via the guide roller 9. The spraying device 5 includes a bracket 50 and a nozzle 51. The bracket 50 is fixedly connected to the frame 1 of the inkjet printer. The nozzle 51 is arranged on the side of the bracket 50, and the bracket 50 and the nozzle 51 are arranged in sequence along the direction in which the printing medium runs in the spraying device 5. Since the printing medium will have different deformation amounts at the edge and the middle when it is damp, ruffle-shaped wrinkles will appear on the edge of the printing medium. When the wrinkles move to the bottom of the nozzle 51, they will not only affect the spraying effect of the two-dimensional code on the surface of the printing medium, but also the raised position of the wrinkles will scratch the nozzle 51, resulting in the inability to form a complete two-dimensional code on the surface of the printing medium, and thus the production of defective products. Therefore, a leveling device 11 is provided on the side of the bracket 50 opposite to the nozzle 51. The leveling device 11 includes a driving device, a support arm 110, and a roller 115. The driving device is fixed to the bracket 50. One end of the support arm 110 is connected to the output shaft of the driving device through a first through-hole 111, so that the support arm 110 can rotate synchronously with the output shaft of the driving device. The other end of the support arm 110 extends in a running direction away from the printing medium. A second through-hole 112 is provided at the end of the support arm 110 away from the driving device. The support arm 110 is connected to the rotating shaft 113 of the roller 115 through the second through-hole 112. The support arm 110 is driven by the driving device to swing, driving the roller 115 to move closer to or away from the printing medium.

[0029] During the inkjet coding operation, the driving device drives the roller 115 to press on the surface of the printing medium. Since the roller 115 is arranged upstream of the nozzle 51, when the printing medium is conveyed forward by the guide roller 9, the roller 115 rolls the position on the surface of the printing medium where the QR code needs to be sprayed, and the position on the printing medium where the QR code needs to be sprayed is leveled by the extrusion force. Then, the nozzle 51 is used to spray the QR code in the leveled area, thereby improving the spraying quality of the QR code on the printing medium.

[0030] In the actual spraying process, it is necessary to spray the QR code on different positions of the printing medium. Therefore, at least two groups of spraying devices 5 are arranged in parallel along the direction perpendicular to the running direction of the printing medium to meet the spraying work of the QR code at different positions and improve the spraying efficiency of the QR code.

[0031] In this embodiment, three groups of spray devices 5 are arranged along the running direction of the printing medium. Only the installation position of the leveling device 11 on the spray device 5 of the middle group is shown in the figure. The leveling devices 11 on the other two groups of spray devices 5 are not shown in the figure. The leveling devices 11 level different positions on the same printing medium respectively, and perform coding operations at corresponding positions through the corresponding spray devices 5.

[0032] In addition, a leveling device 11 is provided on the bracket 50 of all spraying devices 5 to ensure that all positions on the printing medium where the QR code needs to be sprayed are in a flat state before the spraying work is carried out, thereby improving the spraying quality of the QR code.

[0033] In the inkjet printer, the printing medium is driven to move by the friction between the guide roller 9 and the printing medium. When the printing medium runs to the spraying device 5, the guide roller 9 in the spraying device 5 is located below the printing medium. In order to improve the leveling effect of the leveling device 11 on the surface of the printing medium, the length of the support arm 110 can make the roller 115 abut against the guide roller 9 during the inkjet printing process, and the printing medium is squeezed and leveled by the extrusion force between the roller 115 and the guide roller 9.

[0034] Preferably, the support arm 110 in the leveling device 11 can be set as a telescopic structure, and the length of the support arm 110 can be adjusted by the telescopic structure to adapt to guide rollers 9 with different spacings.

[0035] To avoid damaging the print medium, a rubber layer 114 is provided on the outer side of the roller 115. The pressure exerted by the roller 115 on the print medium is transmitted to the surface of the print medium through the rubber layer 114. While achieving the leveling operation of the print medium surface, it prevents the print medium from being deformed due to excessive squeezing force between the roller 115 and the print medium.

[0036] Because it is necessary to spray other positions of the printing medium before spraying the QR code, the temperature of the printing medium rises during the spraying process. When the code is sprayed on the surface of the printing medium with a higher temperature, white lines will be generated on the QR code, resulting in failure in spraying the QR code. Therefore, a cooling device 10 is provided in the feed device 2 of the inkjet printer. When the printing medium is located at the position of the feed device 2, the side on which the QR code needs to be sprayed faces the ground. The cooling device 10 is provided below the printing medium and can generate a cooling airflow toward the printing medium. The cooling airflow quickly cools the printing medium itself and the pattern on the surface of the printing medium.

[0037] Preferably, in order to improve the convenience of installing the cooling device 10, the cooling device 10 is horizontally arranged on the frame 1, so that the cooling airflow generated by the cooling device 10 flows toward the printing medium in a vertical direction.

[0038] The cooling device 10 can be a fan, which includes a fan blade 100 and a support frame 101. The fan blade 100 is fixed on the support frame 101, and an ear plate is provided on the opposite side of the support frame 101 where the fan blade 100 is fixed. The ear plate is provided with a fourth through hole 1011. The support frame 101 is rotatably connected to the output end of the cylinder 1012 through the fourth through hole 1011, and the fixed end of the cylinder 1012 is rotatably connected to the frame 1 through the fifth through hole 1013, and the support frame 101 is rotatably connected to the frame 1 through the third through hole 1010. Under the action of the cylinder 1012, the inclination angle of the support frame 101 can be changed to generate different airflow velocities on the surface of the printing medium.

[0039] Preferably, the inclination angle of the support frame 101 is changed by the cylinder 1012, so that the angle between the direction of the cooling airflow generated by the fan blade 100 and the direction of the printing medium running in the feeding device 2 is an obtuse angle, so that the airflow forms a higher flow rate on the surface of the printing medium, thereby improving the cooling effect of the cooling airflow on the printing medium and achieving the purpose of quickly cooling the printing medium.

[0040] Adaptive changes based on actual needs are all within the protection scope of this utility model.

[0041] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0042] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A coding printer, comprising a spraying device (5), characterized in that: The spraying device (5) comprises a nozzle (51), a bracket (50), and a guide roller (9); the bracket (50) is fixedly arranged on the frame (1) of the inkjet printer; the nozzle (51) is arranged on the downstream side of the frame (1); and a leveling device (11) is arranged on the upstream side; the leveling device (11) is capable of leveling the printing medium.

2. The inkjet printer according to claim 1, characterized in that: The inkjet printer further comprises a feeding device (2), a tension control unit (3), a deviation correction device (4), an image detection unit (7) and a discharging device (8) which are sequentially arranged on the frame (1); a water-cooling traction device (30) is arranged in the tension control unit (3); the spraying device (5) is arranged above the deviation correction device (4); the spraying device (5) is arranged on the downstream side of the deviation correction device (4); a UV drying device (6) is arranged above the deviation correction device (4); the UV drying device (6) is arranged on the downstream side of the spraying device (5); and the image detection unit (7) is arranged downstream of the UV drying device (6).

3. The inkjet printer according to claim 1, characterized in that: The number of the spraying devices (5) is no less than two groups, and the spraying devices (5) are arranged in parallel perpendicular to the running direction of the printing medium.

4. The inkjet printer according to claim 1, characterized in that: The leveling device (11) comprises a driving device, a support arm (110), and a roller (115). The driving device is arranged on the bracket (50). The output end of the driving device is connected to one end of the support arm (110) and drives the support arm (110) to rotate. The other end of the support arm (110) is connected to the rotating shaft (113) of the roller (115).

5. The inkjet printer according to claim 4, characterized in that: The length of the support arm (110) enables the roller (115) to abut against the surface of the guide roller (9).

6. The inkjet printer according to claim 5, characterized in that: The outer side surface of the roller (115) is covered with a rubber layer (114).

7. The inkjet printer according to claim 2, characterized in that: A cooling device (10) is provided at the output end of the feeding device (2), the cooling device (10) is arranged below the printing medium, and the cooling device (10) is capable of generating a cooling airflow toward the printing medium.

8. The inkjet printer according to claim 7, characterized in that: The cooling airflow flows in a vertical direction.

9. The inkjet printer according to claim 7, characterized in that: The cooling device (10) is a fan, comprising a fan blade (100) and a support frame (101), wherein the support frame (101) is horizontally arranged on the frame (1), and the fan blade (100) is arranged on a side of the support frame (101) facing the printing medium.

10. The inkjet printer according to claim 9, characterized in that: A first ear plate is further provided on the side of the support frame (101) opposite to the side where the fan blade (100) is provided, a fourth through hole (1011) is provided on the first ear plate, the support frame (101) is rotatably connected to the output end of the cylinder (1012) through the fourth through hole (1011), a fifth through hole (1013) is provided at the fixed end of the cylinder (1012), and the cylinder (1012) is rotatably connected to the frame (1) through the fifth through hole (1013), a second ear plate is provided on a side of the support frame (101) close to the frame (1), a third through hole (1010) is provided on the second ear plate, and the support frame (101) is rotatably connected to the frame (1) through the third through hole (1010).

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