A label printing device

Abstract

This utility model discloses a label printing device, including a frame, an infeed roller, a take-up roller, and a printing machine. The frame is fixedly connected to the printing machine, the infeed roller, and the take-up roller. Both the infeed roller and the take-up roller are equipped with quick-change devices. The frame is equipped with a drying device and a label paper pre-cleaning device. The quick-change device includes a baffle, a slide groove, a slider, a slot, a clamp, and a top plate. The baffle is movably connected to the infeed roller or the take-up roller. The baffle has multiple slide grooves. The slider has multiple slide grooves and is slidably connected to the slide grooves. The slider has a slot. The clamp is movably connected to the top plate and the slot. The drying device includes a housing, a fan, a heating tube, ventilation holes, and a cooling roller. The housing is fixedly connected to the fan and the frame. There is a gap between the fan and the heating tube. The cooling roller is fixedly connected to the frame and has a gap between it and the heating tube. This utility model solves the problems of drying degree, loading and unloading convenience, and label paper cleanliness in traditional label printing devices.

Description

Technical Field

[0001] This utility model relates to the field of printing apparatus technology, and more specifically, to a label printing apparatus. Background Technology

[0002] Label printing equipment is a specialized device for label printing. It can quickly and efficiently print various labels, such as product labels, logistics labels, and barcode labels. It is widely used in industries such as food, pharmaceuticals, cosmetics, and electronics. However, existing label printing equipment has some shortcomings that affect daily use.

[0003] The primary problem is the complexity of changing the material rollers in existing label printing equipment. Traditional material roller changes often require machine shutdown and involve cumbersome procedures, such as disassembling fixing bolts and adjusting positioning accuracy. A single change can take more than half an hour. For multi-variety, small-batch label production, frequent material changes significantly shorten the effective operating time of the equipment, severely hindering the overall production progress. Furthermore, the complex material change operations require specialized technicians, increasing labor costs. In addition, frequent disassembly of the material roller's fixing components accelerates the wear of bolts, bearings, and other parts, leading to increased equipment maintenance frequency and costs.

[0004] More importantly, the existing label printing equipment has a simple drying system that lacks a low-temperature, high-volume setting stage. The ink is directly exposed to a high-temperature environment immediately after printing, which can cause the surface to dry rapidly and form a sealed layer, hindering the evaporation of internal solvents. This results in incomplete deep curing of the ink, making it prone to ink sticking when labels are stacked or rubbed. This is especially true for high-viscosity solvent-based inks, which can significantly increase the scrap rate. When the dried labels are directly sent to the receiving stage, the high temperature keeps the label material thermoplastic, and the winding tension can easily cause the label edges to stretch and deform. Furthermore, the ink is not fully set at high temperatures, and the stacking pressure after winding can cause interlayer adhesion, resulting in tearing when the roll is unwound.

[0005] Crucially, existing label printing equipment lacks cleaning devices. During storage and transportation, label materials easily accumulate dust, fibers, oil, and other impurities on their surfaces. Without cleaning components, these impurities directly enter the printing unit. During printing, these impurities prevent ink from contacting the material surface, leading to problems such as missed prints, white spots, and incomplete patterns. This is especially problematic for high-precision QR codes and labels with small text, where such defects can render the information unreadable and render the product unusable. Furthermore, the printing plate has a high surface precision. When hard impurities on the label paper come into contact with the printing plate, they can scratch and wear it under printing pressure, damaging the patterns and text on the plate, shortening its lifespan, and increasing production costs. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] In view of the problems existing in the prior art, the present invention provides a label printing device to solve the technical problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: A label printing device, comprising a frame, an infeed roller, a take-up roller, and a printing machine. The frame is fixedly connected to the printing machine, the infeed roller, and the take-up roller, respectively. Both the infeed roller and the take-up roller are equipped with quick-change devices. The frame is equipped with a drying device and a label paper pre-cleaning device. The quick-change device includes a baffle, a slide groove, a slider, a slot, a clamp, and a top plate. The baffle is movably connected to the infeed roller or the take-up roller. The baffle has multiple slide grooves. The slider has multiple sliders and is slidably connected to the slide grooves. The slider has a slot. The clamp is movably connected to the top plate and the slot, respectively. The drying device includes a housing, a fan, a heating tube, ventilation holes, and a cooling roller. The housing has ventilation holes. The housing is fixedly connected to the fan and the frame, respectively. There is a gap between the fan and the heating tube. The cooling roller is fixedly connected to the frame and has a gap between it and the heating tube.

[0010] The present invention is further configured such that the label paper pre-cleaning device includes an atomizer, a metering pump, a cleaning water tank, an air pump, a drying pipe, and an air nozzle. The atomizer and the air nozzle are both fixedly connected to the frame. The metering pump, the cleaning water tank, the drying pipe, and the air pump are fixedly installed on the inner wall of the frame. The atomizer and the air nozzle are fixedly connected above the frame. There is a gap between the atomizer and the air nozzle and the feed roller. The metering pump is connected to the cleaning water tank and the atomizer respectively through pipelines. The air nozzle and the air pump are connected through air pipes. There is a gap between the drying pipe and the atomizer and the air nozzle.

[0011] The present invention is further configured such that the feed roller and the take-up roller are provided with grooves that cooperate with the slider, and the grooves are movably connected to the slider, thereby improving the speed of loading and unloading.

[0012] The present invention is further configured such that the cooling roller is equipped with a cooling water tank and a water pump, both of which are fixedly connected to the frame, and the cooling roller, the cooling water tank and the water pump are connected by water pipes, thereby improving the stability of cooling.

[0013] The present invention is further configured such that the air nozzle is tilted to ensure the drying of the label paper.

[0014] The present invention is further configured such that the drying device has two sets in the horizontal direction with a gap between the two sets, thereby improving the degree of drying.

[0015] The present invention is further provided that the feed roller and the take-up roller are provided with fixedly connected support plates, which improves the convenience of loading and unloading materials.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, the present invention provides a label printing device with the following advantages:

[0018] 1. A complete quick-change device is formed by the tight cooperation between baffles, chutes, sliders, slots, clamps, and top plates. The material roll is locked by the cooperation of sliders, chutes, sliders, slots, clamps, and baffles. The installation of the material roll is completed by limiting the lateral position of the material roll by the top plate, which shortens the changeover time. Simple operation means that no complicated steps or professional skills are required. Workers can quickly change the material roll, reduce the downtime of the equipment, and allow the printing equipment to return to production status more quickly. Especially in batch production or multi-batch label printing scenarios, it can significantly improve the overall production progress. The simple operation process reduces the frequency and duration of production interruptions caused by changing the material roll, ensures the continuity of production, and avoids the efficiency loss caused by frequent downtime.

[0019] 2. A complete drying device is formed by the close cooperation between the outer shell, fan, heating tube, ventilation holes and cooling roller. The fan sends the heat from the heating tube to the label paper to fully cure the ink during drying. The cooling roller cools the label to prevent it from sticking. When the ink on the printed label surface is not yet dry, it is easy to get smudged, scratched and stuck, resulting in blurred patterns and mixed colors, which seriously affects the printing effect. The drying device can quickly cure and dry the ink, effectively avoiding the damage to the pattern caused by the ink not drying, ensuring that the text and pattern on the label are clear and complete, and the colors are bright and stable, thereby improving the overall printing quality.

[0020] 3. A complete label pre-cleaning device is formed by the close cooperation between the atomizer, metering pump, cleaning water tank, air pump, drying tube, and air nozzle. The atomizer sprays cleaning water onto the label paper, and the air nozzle blows away the moisture and impurities. During storage and transportation, label paper is prone to adhering to impurities such as dust, fibers, and oil. The pre-cleaning device can thoroughly remove impurities from the label paper surface before printing, ensuring a clean and flat printing surface, providing a foundation for high-quality printing, and making the text and patterns on the label clearer and the colors more uniform. Compared with cleaning with a brush, the label paper will not have the impurities of the brush bristles, making the label paper cleaner. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a label printing device according to the present invention. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the overall structure of a label printing device according to the present invention. Figure 2 ;

[0023] Figure 3 A cross-sectional view of the overall structure of a label printing device according to this utility model. Figure 1 ;

[0024] Figure 4 A cross-sectional view of the overall structure of a label printing device according to this utility model. Figure 2 ;

[0025] Figure 5 This is an exploded view of the quick-change device structure in this utility model;

[0026] Figure 6 This is a schematic diagram showing the connection between the feed roller, support plate, and trough in this utility model.

[0027] In the diagram: 1. Frame; 2. Feed roller; 3. Take-up roller; 4. Printing machine; 5. Baffle; 6. Slide rail; 7. Slider; 8. Slot; 9. Clamp; 10. Top plate; 11. Outer shell; 12. Fan; 13. Heating tube; 14. Ventilation hole; 15. Cooling roller; 16. Atomizer; 17. Metering pump; 18. Cleaning water tank; 19. Air pump; 20. Drying tube; 21. Air nozzle; 22. Tank; 23. Cooling water tank; 24. Water pump; 25. Support plate. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] Please see Figures 1-6A label printing apparatus includes a frame 1, an infeed roller 2, a take-up roller 3, and a printing machine 4. The frame 1 is fixedly connected to the printing machine 4, the infeed roller 2, and the take-up roller 3. Both the infeed roller 2 and the take-up roller 3 are equipped with quick-change devices. The frame 1 is equipped with a drying device and a label paper pre-cleaning device. The quick-change device includes a baffle 5, a slide 6, a slider 7, a slot 8, a clamp 9, and a top plate 10. The baffle 5 is movably connected to the infeed roller 2 or the take-up roller 3. The baffle 5 is provided with multiple slides 6. The slider 7 is provided with multiple slides and is slidably connected to the slides 6. The slider 7 is provided with slots 8. The clamp 9 is movably connected to the top plate 10 and the slots 8. The drying device includes a housing 11, a fan 12, a heating tube 13, a ventilation hole 14, and a cooling roller 15. The housing 11 is provided with ventilation holes 14. The housing 11 is fixedly connected to the fan 12 and the frame 1. There is a gap between the fan 12 and the heating tube 13. The cooling roller 15 is fixedly connected to the frame 1 and has a gap with the heating tube 13.

[0032] In a further embodiment of this application, the label pre-cleaning device includes an atomizer 16, a metering pump 17, a cleaning water tank 18, an air pump 19, a drying tube 20, and an air nozzle 21. The atomizer 16 and the air nozzle 21 are both fixedly connected to the frame 1. The metering pump 17, the cleaning water tank 18, the drying tube 20, and the air pump 19 are fixedly installed on the inner wall of the frame 1. The atomizer 16 and the air nozzle 21 are fixedly connected above the frame 1. There is a gap between the atomizer 16 and the air nozzle 21 and the feed roller 2. The metering pump 17 is connected to the cleaning water tank 18 and the atomizer 16 through pipelines. The air nozzle 21 and the air pump 19 are connected through an air pipe. There is a gap between the drying tube 20 and the atomizer 16 and the air nozzle 21.

[0033] In a further embodiment of this application, the feed roller 2 and the take-up roller 3 are provided with a groove 22 that cooperates with the slider 7. The groove 22 is movably connected to the slider 7, and the cooperation between the groove 22 and the slider 7 enables the baffle 5 and the feed roller to rotate better.

[0034] In a further embodiment of this application, the cooling roller 15 is provided with a cooling water tank 23 and a water pump 24. Both the cooling water tank 23 and the water pump 24 are fixedly connected to the frame 1. The cooling roller 15, the cooling water tank 23 and the water pump 24 are connected by water pipes. After two drying cycles, the water will pass through the cooling roller 15. The water pump 24 will circulate the cooling water from the cooling water tank 23 within the cooling water tank 23 and the cooling roller 15 to keep the cooling roller 15 cool. This significantly improves the hardness and stiffness of the label after passing through the cooling roller 15, effectively preventing wrinkles or sticking during the subsequent material collection process.

[0035] In a further embodiment of this application, the nozzle 21 is tilted, which allows it to blow away moisture and impurities from the label paper for cleaning.

[0036] In a further embodiment of this application, the drying device is provided in two sets in the horizontal direction with a gap between the two sets. After the first drying, the second drying is performed immediately. In the first drying device, the heating tube 13 has low heat but the fan 12 has high air volume, which makes the ink quickly set and prevents the ink from spreading. In the second drying device, the heating tube 13 has high heat and the fan 12 has low air volume, which makes the ink deeply dried and ensures that the ink is fully cured.

[0037] In a further embodiment of this application, the feed roller 2 and the take-up roller 3 are provided with a fixedly connected support plate 25. The material roll can be inserted into the feed roller 2 or the take-up roller 3 through the support plate 25 for loading and unloading replacement.

[0038] In this embodiment, when the device is needed, the clamp 9 is opened and removed from the slot 8, and the clamp 9 and top plate 10 are removed, so that the baffle 5 can be removed from the feed roller 2 or take-up roller 3. Then, the slider 7 is removed from the baffle 5 and slot 22 along the slide groove 6. After removing the baffle 5, the material roll can be inserted into the feed roller 2 or take-up roller 3 through the support piece 25 for loading and unloading. When printing is in progress, the motor is started to rotate the feed roller 2 and take-up roller 3 and the printing press 4 is started, so that the feed roller 2... The material is fed into the printing press 4 for printing and then collected by the receiving roller 3. Before the label paper enters the printing press 4, the air pump 19, metering pump 17, atomizer 16 and drying tube 20 are started. The metering pump 17 sprays the cleaning water in the cleaning water tank 18 onto the label paper through the atomizer 17. The air pump 19 sends air into the air nozzle 21 and blows it out to remove the cleaning water and impurities and clean the label paper. After running for a period of time, the label paper passes through the drying tube 20 to dry the water on the surface of the label paper before entering the printing press 4 for printing.

[0039] More specifically, during the use or operation of the entire equipment: After printing, the label paper undergoes two drying processes before entering the take-up roller 3. The fan 12 and heating tube 13 are activated. The fan 12 blows the heat from the heating tube 13 onto the label through the ventilation hole 14. After the first drying, the second drying is performed. In the first drying process, the heating tube 13 has a low heat output, but the fan 12 has a high airflow, which quickly sets the ink and prevents ink diffusion. In the second drying process, the heating tube 13 has a high heat output, but the fan 12 has a low airflow, which deeply dries the ink and ensures that the ink is fully cured. After the two drying processes, the label passes through the cooling roller 15. The water pump 24 circulates the cooling water from the cooling water tank 23 within the cooling water tank 23 and the cooling roller 15 to keep the cooling roller 15 cool. This significantly improves the hardness and stiffness of the label after passing through the cooling roller 15, effectively preventing wrinkles or sticking during the subsequent take-up process.

[0040] In summary, by opening clamp 9 and removing it from slot 8, clamp 9 and top plate 10 are removed, allowing baffle 5 to be removed from feed roller 2 or take-up roller 3. Then, slider 7 is removed from baffle 5 and slot 22 along slide groove 6. After removing baffle 5, the material roll can be inserted into feed roller 2 or take-up roller 3 via support plate 25 for loading and unloading. When printing is in progress, the motor is started to rotate feed roller 2 and take-up roller 3, and the printing press 4 is started, allowing feed roller 2 to discharge material through the printing press. 4. Printing is performed and the label paper is collected through the receiving roller 3. Before the label paper enters the printing press 4, the air pump 19, metering pump 17, atomizer 16 and drying tube 20 are started. The metering pump 17 sprays the cleaning water in the cleaning water tank 18 onto the label paper through the atomizer 17. The air pump 19 sends air into the air nozzle 21 and blows it out to remove the cleaning water and impurities and clean the label paper. After running for a period of time, the label paper passes through the drying tube 20 to dry the water on the surface of the label paper and enters the printing press 4 for printing.

[0041] After printing, the label paper undergoes two drying cycles before entering the take-up roller 3. Fan 12 and heating element 13 are activated. Fan 12 blows heat from heating element 13 onto the label through ventilation holes 14. Following the first drying cycle, a second drying cycle is performed. In the first drying cycle, heating element 13 generates less heat, but fan 12 provides a larger airflow, allowing the ink to quickly solidify and preventing ink diffusion. In the second drying cycle, heating element 13 generates more heat, but fan 12 provides a smaller airflow, ensuring deep ink drying and full curing. After these two drying cycles, the label passes through cooling roller 15. Water pump 24 circulates cooling water from cooling tank 23 between cooling tank 23 and cooling roller 15, maintaining the cooling of cooling roller 15. This significantly improves the hardness and stiffness of the label after passing through cooling roller 15, effectively preventing wrinkles or sticking during subsequent take-up.

[0042] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A label printing apparatus comprising a frame (1), an infeed roller (2), an outfeed roller (3) and a printer (4), characterised in that: The frame (1) is fixedly connected to the printing press (4), the feed roller (2), and the take-up roller (3) respectively. The feed roller (2) and the take-up roller (3) are both equipped with quick-change devices. The frame (1) is equipped with a drying device and a label paper pre-cleaning device. The quick-change device includes a baffle (5), a chute (6), a slider (7), a slot (8), a clamp (9), and a top plate (10). The baffle (5) is movably connected to the feed roller (2) or the take-up roller (3). The baffle (5) is equipped with multiple chute (6). The slider (7) is equipped with multiple chute (6) and slides with the chute (6). The sliding block (7) is provided with a slot (8), and the clamp (9) is movably connected to the top plate (10) and the slot (8) respectively. The drying device includes a shell (11), a fan (12), a heating tube (13), a ventilation hole (14) and a cooling roller (15). The shell (11) is provided with a ventilation hole (14). The shell (11) is fixedly connected to the fan (12) and the frame (1) respectively. There is a gap between the fan (12) and the heating tube (13). The cooling roller (15) is fixedly connected to the frame (1) and there is a gap between it and the heating tube (13).

2. A label printing apparatus according to claim 1, characterised in that: The label pre-cleaning device includes an atomizer (16), a metering pump (17), a cleaning water tank (18), an air pump (19), a drying tube (20), and a nozzle (21). The atomizer (16) and the nozzle (21) are fixedly connected to the frame (1). The metering pump (17), the cleaning water tank (18), the drying tube (20), and the air pump (19) are fixedly installed on the inner wall of the frame (1). The atomizer (16) and the nozzle (21) are fixedly connected above the frame (1). The atomizer (16) and the nozzle (21) have gaps with the feed roller (2). The metering pump (17) is connected to the cleaning water tank (18) and the atomizer (16) through pipelines. The nozzle (21) and the air pump (19) are connected through an air pipe. The drying tube (20) has gaps with the atomizer (16) and the nozzle (21).

3. A label printing apparatus according to claim 1, wherein: The feed roller (2) and take-up roller (3) are provided with grooves (22) that cooperate with the slider (7), and the grooves (22) are movably connected to the slider (7).

4. A label printing apparatus according to claim 1, wherein: The cooling roller (15) is equipped with a cooling water tank (23) and a water pump (24). The cooling water tank (23) and the water pump (24) are fixedly connected to the frame (1). The cooling roller (15), the cooling water tank (23) and the water pump (24) are connected by water pipes.

5. A label printing apparatus according to claim 2, wherein: The jet nozzle (21) is tilted.

6. A label printing apparatus according to claim 1, wherein: The drying device has two sets in the horizontal direction with a gap between them.

7. A label printing apparatus according to claim 1, wherein: The feed roller (2) and take-up roller (3) are provided with fixedly connected support plates (25).

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