A device for labeling the inside of a paper core paper tube

Abstract

The utility model relates to a paper core automatic label sticking technical field, concretely to a device of paper core paper tube inside label sticking, including frame, the frame middle position is equipped with the locating groove, the locating groove is equipped with the core placing subassembly and the discharge mechanism, the core placing subassembly bottom is equipped with the lifting translation mechanism, the lifting translation mechanism is used for lifting or translation core placing subassembly, the locating groove both sides are equipped with the feeding area and the discharge area respectively, the locating groove both ends are equipped with the positioning mechanism, and the positioning mechanism at locating groove one end is equipped with the label printing mechanism, and the label printing mechanism is connected and is equipped with the label sticking mechanism, and the label sticking mechanism includes label conveying mechanism and label sticking pressure mechanism, the utility model discloses through the combination configuration of the structure of feeding, positioning, label sticking and discharging to make this equipment can reduce manual operation to realize the automation of production process.

Description

Technical Field

[0001] This utility model relates to the field of automatic labeling technology for paper cores, specifically a device for labeling the inside of paper core tubes. Background Technology

[0002] In the film winding production process, the winding mandrel is the core component for material winding and rewinding, and the air shaft, with its advantages of convenient loading and unloading and stable clamping, has become the most commonly used type of winding mandrel. The paper core, as the initial roll of material, needs to be precisely installed on the air shaft. It is the core of the initial roll of rolled materials such as plastic film and plays a crucial role in plastics industrial production, serving as a key carrier for continuous material winding, storage, and subsequent processing.

[0003] However, paper cores, as the initial rolls of rolled materials, are characterized by their diverse specifications and large quantities. In actual production, paper cores are often bundles of identical products, making it difficult to identify individual cores. However, current production processes often require labeling each roll with information, typically including production information, specifications, or traceability codes, to facilitate rapid identification by downstream manufacturers or quality control personnel.

[0004] Therefore, information labels need to be affixed to the paper core before each winding. Since the outer surface of the paper core is covered by the roll material during winding, the side area is small and easily damaged, so the best labeling position is the inner hole of the paper core. However, the inner hole of the paper core has a small space, making manual labeling difficult, time-consuming and labor-intensive, which seriously affects the efficiency of automated production.

[0005] To address the aforementioned technical issues, a device for labeling the inside of paper cores and tubes was designed. Utility Model Content

[0006] In view of the shortcomings of the prior art mentioned in the background, the present invention provides a device for labeling the inside of a paper core and paper tube.

[0007] This utility model overcomes the above technical problems by adopting the following technical solution: A device for labeling the inside of a paper core tube includes a frame with a positioning groove in the middle. The positioning groove is equipped with a core feeding assembly and a discharge mechanism. The bottom of the core feeding assembly is equipped with a lifting and translating mechanism for lifting or translating the core feeding assembly. The two sides of the positioning groove are respectively set as a feeding area and a discharge area. Positioning mechanisms are provided at both ends of the positioning groove. A label printing mechanism is provided at one end of the positioning groove at the positioning mechanism. The label printing mechanism is connected to a label bonding mechanism, which includes a label conveying mechanism and a label pressing mechanism.

[0008] Working principle: The paper core is fed into the positioning slot through the feeding area. According to the specifications of the paper core, the position of the paper core is adjusted by the lifting and translation mechanism, so that the labeling position of the paper core is aligned with the label bonding mechanism. Then, the positioning mechanism further aligns it from the side, which can ensure the stable positioning of the paper core during the labeling process. Then, the label conveying mechanism conveys the label to the label bonding mechanism for labeling. After the labeling is completed, the paper core is sent to the discharge area through the discharge mechanism. This achieves accurate and automatic labeling, improves labeling efficiency, and is compatible with various specifications of paper cores.

[0009] Preferably, the core placement assembly includes a mounting frame and multiple V-shaped rollers mounted on the mounting frame. The lifting and translating mechanism is located at the bottom of the mounting frame and includes a lifting mechanism and a translating mechanism. The lifting mechanism includes a lifting cylinder, which lifts vertically. The translating mechanism includes a ball screw, which is driven by a servo motor. The mounting frame, lifting mechanism, and translating mechanism are connected sequentially from top to bottom. The discharging mechanism includes a discharging cylinder, and a discharging plate is provided at the top of the discharging cylinder. The discharging plate is inclined toward the discharging area.

[0010] Preferably, the feeding area includes a feeding plate inclined toward the positioning groove, and the feeding plate is provided with a material blocking mechanism. The discharging area includes a discharging plate inclined downward from the positioning groove. The material blocking mechanism includes a material blocking cylinder and a material blocking rod assembly connected to the material blocking cylinder. The material blocking cylinder drives the material blocking rod assembly to extend out of the feeding plate or retract below the feeding plate.

[0011] Preferably, the material blocking rod assembly includes two sets of material blocking rods arranged parallel to the positioning groove. The distance between the two sets of material blocking rods is greater than the diameter of one paper core and less than the diameter of two paper cores. The bottom of the two sets of material blocking rods is provided with a connecting member. The connecting member and the two sets of material blocking rods form a lever structure. The material blocking cylinder is connected to one end of the connecting member. The two sets of material blocking rods are arranged such that one set is exposed above the feed plate and the other set is located below the feed plate.

[0012] Preferably, the positioning mechanism includes a positioning cylinder and a positioning plate connected to the positioning cylinder. The positioning cylinder drives the positioning plate to move laterally. The positioning plate with a label attaching mechanism has a through hole in the middle, and the label attaching mechanism passes through the through hole to attach the label.

[0013] Preferably, the label conveying mechanism includes a guide assembly, a peeling mechanism, and a bottom paper recycling roller in sequence. The guide assembly includes multiple sets of guide roller assemblies and a mounting frame. The guide roller assembly includes guide rollers and a bracket connected in sequence. The bracket and the mounting frame are detachably connected. The multiple sets of guide roller assemblies are arranged in a Z-shape. The peeling mechanism includes a peeling plate, and the peeling plate forms an acute angle with the through hole.

[0014] Preferably, the mounting frame includes a label-taking assembly, a pressing mechanism, and a pressure roller assembly. The label-taking assembly includes a label-taking rod with a suction cup connected to a negative pressure system. The pressure roller assembly includes a pressure roller rod and a pressure roller located at the front end of the pressure roller rod. The pressing mechanism includes a rotating mechanism and a guide rod cylinder. The guide rod cylinder includes a guide rod and a cylinder. The rotating mechanism is mounted on the guide rod. The label-taking rod and the pressure roller rod are respectively sleeved on the rotating mechanism, and the rotating mechanism drives the label-taking rod and the pressure roller rod to form rotating swing arms.

[0015] Preferably, the lifting cylinder includes a second cylinder and a cylinder piston rod assembly, wherein the cylinder piston rod includes multiple lifting guide rods that are distributed in parallel.

[0016] Preferably, the edges of the stripping plate are polished.

[0017] Preferably, a baffle plate is provided at the end of the feeding plate away from the positioning groove, and the pressure roller is a polyurethane structural component.

[0018] By adopting the above structure, this utility model has the following advantages compared with the prior art: 1. This utility model, through the combination of feeding, positioning, labeling and unloading structures, enables the equipment to reduce manual operation and thus realize the automation of the production process.

[0019] 2. In order to make the label more stable, this utility model adds a pressure roller during the labeling process, so that the label can be more stably attached to the inside of the paper core.

[0020] 3. This utility model makes the paper core more stable during the alignment process by setting multiple lifting guide rods. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a schematic diagram of the label bonding mechanism of this utility model; Figure 4 This is a schematic diagram of the material-stopping mechanism of this utility model; Figure 5 This is a schematic diagram of the lifting and translating mechanism of this utility model.

[0022] In the diagram: 1. Frame; 2. Positioning slot; 3. Core feeding assembly; 4. Discharge mechanism; 5. Lifting and translation mechanism; 6. Positioning mechanism; 7. Label printing mechanism; 8. Label conveying mechanism; 9. Label pressing mechanism; 101. Feeding area; 102. Discharge area; 103. Material blocking mechanism; 104. Material blocking cylinder; 105. Material blocking rod assembly; 106. Material blocking rod; 107. Connecting piece; 108. Material blocking plate; 301. Mounting frame; 302. V-shaped roller; 401. Discharge cylinder; 40 2. Discharge plate; 501. Lifting mechanism; 502. Translation mechanism; 601. Positioning cylinder; 602. Positioning plate; 801. Guide assembly; 802. Peeling mechanism; 803. Bottom paper recycling roller; 804. Guide roller; 805. Bracket; 806. Mounting frame; 901. Label picking assembly; 902. Pressing mechanism; 903. Pressure roller assembly; 904. Label picking rod; 905. Suction cup; 906. Pressure roller rod; 907. Pressure roller; 908. Rotation mechanism; 909. Guide rod cylinder. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figures 1-5In this embodiment of the utility model, a device for labeling the inside of a paper core tube includes a frame 1. A positioning groove 2 is provided in the middle of the frame 1. The positioning groove 2 is equipped with a core-feeding assembly 3 and a discharge mechanism 4. A lifting and translating mechanism 5 is provided at the bottom of the core-feeding assembly 3. The lifting and translating mechanism 5 is used to lift or translate the core-feeding assembly 3. A feeding area 101 and a discharge area 102 are respectively provided on both sides of the positioning groove 2. Positioning mechanisms 6 are provided at both ends of the positioning groove 2. A label printing mechanism 7 is provided at one end of the positioning groove 2 at the positioning mechanism 6. The label printing mechanism 7 is connected to a label bonding mechanism, which includes a label conveying mechanism 8 and a label pressing mechanism 9. In specific implementation, the frame 1 is constructed using 40 series aluminum alloy profiles (40×40mm, 40×80mm) to form a frame structure, rigidly connected by special corner fittings and internal hex bolts. The 40 series aluminum alloy profiles are anodized, providing both rust resistance and high strength to meet the equipment's load-bearing requirements. A total of 6 positioning mechanisms are provided at the four corners and the midpoint of the long side of the bottom of the frame. Each adjustable foot has an adjustment range of ±50mm. By synchronously adjusting the height of the feet at different positions, the conveyor table can be tilted at an angle of 0.5°-3°, with the tilt direction along the paper core conveying direction. Gravity is used to drive the paper core to move, reducing power consumption. In the specific implementation process, the label printing mechanism 7 includes a label printer, specifically as follows: printing method: thermal transfer printing, resolution 300dpi to ensure clear and scannable QR codes; Print width: 20-100mm adjustable; print speed: 100-300mm / s (matching labeling speed). Consumable compatibility: Label roll inner diameter 76mm, maximum outer diameter 300mm, supports automatic paper detection and paper shortage alarm.

[0026] Control interface: Connects to the main control system via RS485 communication, can receive real-time printing commands (such as printing a label when a labeling action is triggered), and provide feedback on printing status (success / out of ribbon / paper jam).

[0027] In another embodiment, specifically as follows: Figure 4 and Figure 5As shown, the core-laying assembly 3 includes a mounting frame 301 and multiple V-shaped rollers 302 mounted on the mounting frame 301. The lifting and translating mechanism 5 is located at the bottom of the mounting frame 301 and includes a lifting mechanism 501 and a translating mechanism 502. The lifting mechanism 501 includes a lifting cylinder, and the lifting direction of the lifting cylinder is vertical. The translating mechanism 502 includes a ball screw, which is driven by a servo motor. The mounting frame 301, the lifting mechanism 501, and the translating mechanism 502 are connected sequentially from top to bottom. The discharge mechanism 4 includes... The discharge cylinder 401 has a discharge plate 402 on its top. The discharge plate 402 is inclined toward the discharge area 102. Through the coordinated action of lifting and horizontal translation, the paper core carried on the V-shaped roller 302 is precisely adjusted to a preset position that is concentric and coaxial with the label pressing mechanism 9, ensuring that the label can be accurately attached to the designated area of ​​the inner hole of the paper core. It is a key adjustment mechanism for achieving high-precision labeling. At the same time, the discharge mechanism 4 can more accurately feed the paper core into the discharge area 102 by pushing it upward through the discharge cylinder 401 and because the discharge plate 402 is inclined toward the discharge area 102.

[0028] In another embodiment, specifically... Figure 2 As shown, the feeding area 101 includes a feeding plate inclined towards the positioning groove 2, and a baffle mechanism 103 is provided on the feeding plate. The discharging area 102 includes a discharging plate inclined downward from the positioning groove 2. In a specific embodiment, the width of the feeding plate and the discharging plate can be adjusted, and the feeding plate and the discharging plate are selected to be 3mm. The thick cold-rolled steel plate, with a surface sandblasted and coated with a wear-resistant epoxy coating of 50μm thickness, ensures a smooth surface with a flatness of ≤0.5mm / m, while also providing moderate friction with a coefficient of friction of 0.3-0.5. This ensures that the paper core slides smoothly along the inclined direction without slippage or overspeed. The material blocking mechanism 103 includes a material blocking cylinder 104 and a material blocking rod assembly 105 connected to the material blocking cylinder 104. The material blocking cylinder 104 drives the material blocking rod assembly 105 to extend out of the feed plate or retract below the feed plate. The cylinder drives the material blocking rod, which extends out of the table and intercepts the paper core by blocking the front end. This ensures that only one paper core is allowed to slide into the V-shaped roller 302 of the lifting and translating mechanism 5 at a time, avoiding paper core accumulation and congestion, and providing orderly material input for the precise positioning of the lifting and translating mechanism 5.

[0029] In another embodiment, specifically as follows: Figure 4As shown, the baffle assembly 105 includes two sets of baffles 106 arranged parallel to the positioning groove 2. The distance between the two sets of baffles 106 is greater than the diameter of one paper core and less than the diameter of two paper cores. Connectors 107 are provided at the bottom of the two sets of baffles 106, forming a lever structure with the two sets of baffles 106. The baffle cylinder 104 is connected to one end of the connector 107. One set of baffles 106 is exposed above the feed plate, and the other is located below the feed plate. In practice, a diffuse reflection photoelectric sensor is installed downstream of the baffle (near the V-shaped roller) to detect whether there is a paper core on the V-shaped roller. When the sensor does not detect a paper core and the lifting and translating mechanism 5 resets to the waiting position, the PLC controls the cylinder to retract the baffle, releasing one paper core. The paper core slides along the inclined platform under gravity and accurately falls into the V-shaped roller. Inside the slot; then the cylinder quickly extends the baffle bar to intercept the subsequent paper core, completing a single capture and release action. At the same time, by setting two sets of baffle bars 106, paper cores can be placed on the other set of baffle bars 106 simultaneously. Due to the lever structure, when the baffle bar 106 near the positioning slot 2 descends, the baffle bar 106 away from the positioning slot 2 rises to block the paper core behind. When the baffle bar 106 near the positioning slot 2 rises, the baffle bar 106 away from the positioning slot 2 descends, ensuring that only one paper core is released at a time into the V-shaped roller 302 of the lifting and translation mechanism 5, avoiding paper core accumulation and congestion, and providing orderly material input for the precise positioning of the lifting and translation mechanism 5.

[0030] In another embodiment, specifically as follows: Figure 5 As shown, the positioning mechanism 6 includes a positioning cylinder 601 and a positioning plate 602 connected to the positioning cylinder 601. The positioning cylinder 601 drives the positioning plate 602 to move laterally. The positioning plate 602, which is equipped with a label attaching mechanism, has a through hole in the middle. The label attaching mechanism passes through the through hole to attach the label. The label conveying mechanism 8 includes a guide assembly 801, a peeling mechanism 802, and a bottom paper recycling roller 803 in sequence. The guide assembly 801 includes multiple sets of guide roller 804 assemblies and a mounting frame 806. The guide roller 804 assembly includes guide rollers 804 and a bracket 805 connected in sequence. The bracket 805 and the mounting bracket 806 are detachably connected. Multiple sets of guide rollers 804 are arranged in a Z-shape. The peeling mechanism 802 includes a peeling plate, which forms an acute angle with the through hole. During implementation, the multiple sets of guide rollers 804 are arranged in a "Z" shape to ensure smooth label tape delivery without wrinkles or deviation. Since the bracket 805 and the mounting bracket 806 are detachably connected, the height of the bracket 805 is adjustable to accommodate label tapes of different thicknesses. The bottom paper recycling roller 803 includes a torque motor and a winding shaft, thereby adjusting the winding tension to ensure that the bottom paper is tight and not to be torn. The winding shaft can be quickly disassembled for easy replacement of a full roll of bottom paper.

[0031] Further, the label applying mechanism 9 includes a label picking component 901, a pressing mechanism 902, and a pressure roller assembly 903. The label picking component 901 includes a label picking rod 904, and a suction cup 905 is provided on the label picking rod 904. The suction cup 905 is connected to a negative pressure system. The pressure roller assembly 903 includes a pressure roller rod 906 and a pressure roller 907 located at the front end of the pressure roller rod 906. The pressing mechanism 902 includes a rotating mechanism 908 and a guide rod cylinder 909. The guide rod cylinder 909 includes a guide rod and a cylinder. The rotating mechanism 908 is disposed on the guide rod. The label picking rod 904 and the pressure roller rod 906 are respectively sleeved on the rotating mechanism 908. The rotating mechanism 908 drives the label picking rod to apply the label to the pressure roller. The label rod 904 and the pressure roller rod 906 form a rotating swing arm. In the actual implementation process, the label (with backing paper) output by the printer is accurately delivered to the peeling position to complete the separation of the label from the backing paper. The peeled label is then sent to the label picking position of the bonding mechanism and accurately pasted to the designated position inside the paper core. The pressure roller 907 presses the label to ensure that it is firmly attached. In the actual implementation process, the vacuum suction cup 905 is customized according to the shape of the label and is replaceable. The suction cup 905 is made of silicone with rounded edges to avoid scratching the inner wall of the paper core. The negative pressure system is provided by a vacuum pump generator with adjustable negative pressure. The suction is controlled by a solenoid valve to ensure that the label is firmly attached and that there is no residual suction when it is released.

[0032] In another embodiment, to make the paper core lifting process more stable, further improvements were made to the above embodiment. Specifically, the lifting cylinder includes a second cylinder and a cylinder piston rod assembly. The cylinder piston rod includes multiple lifting guide rods, which are distributed in parallel.

[0033] In another embodiment, to avoid the peeling plate scratching the label, a further improvement was made to the above embodiment, specifically: the edges of the peeling plate were polished.

[0034] In another embodiment, in order to avoid accumulation or collision due to continuous sliding under gravity, further improvements were made in the above embodiment, specifically: a baffle plate 108 is provided at the end of the discharge plate 402 away from the positioning groove 2, and the pressure roller 907 is a polyurethane structural component.

[0035] Specific implementation process: Multiple paper cores slide along the feed plate towards the positioning groove 2 under the gravity of the inclined conveyor table → The feed stop mechanism 103 extends a stop bar to intercept the paper cores → The lifting unit of the lifting and translating mechanism 5 lifts and translates the V-shaped roller to a height matching the diameter of the paper core, and the translating mechanism 502 returns to its initial position → When there is no paper core on the V-shaped roller, the stop bar retracts, releasing one paper core → The paper core slides into the V-shaped roller to complete the initial centering → According to the paper core specifications, the height of the paper core is adjusted to be concentric with the label bonding mechanism by the lifting and translating mechanism 5, and the axial position of the paper core is adjusted to the labeling area by the translating unit driven by the servo motor and the ball screw → The positioning mechanism 6 pushes the paper core to complete the radial precise positioning → The label printer prints the label → The label conveying mechanism 8 peels off the label and sends it to the label picking position → The label picking rod 904 is raised by the rotating mechanism 908, so that the vacuum suction cup 905 on the label picking rod 904 can pick up the label. The label is picked up, and then the label picking rod 904 and pressure roller rod 906 are lowered by the rotating mechanism 908. Then, the telescopic rod of the label pasting mechanism is inserted into the designated position of the inner hole of the paper core by the guide rod cylinder 909 after picking up the label. The vacuum suction cup 905 releases the label and presses it by the pressure roller 907. The telescopic rod retracts and the positioning mechanism 6 resets. The discharge plate 402 is raised by the discharge cylinder 401 and the paper core is released onto the feeding plate. The paper core slides to the discharge baffle plate 108 for temporary storage, completing one paper core labeling operation.

[0036] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention.

Claims

1. A device for labeling the inside of a paper core tube, comprising a frame (1), characterized in that, The frame (1) is provided with a positioning groove (2) in the middle. The positioning groove (2) is provided with a core feeding assembly (3) and a discharge mechanism (4). The bottom of the core feeding assembly (3) is provided with a lifting and translating mechanism (5). The lifting and translating mechanism (5) is used to lift or translate the core feeding assembly (3). The two sides of the positioning groove (2) are respectively provided with a feeding area (101) and a discharge area (102). The positioning groove (2) is provided with a positioning mechanism (6) at both ends. A label printing mechanism (7) is provided at one end of the positioning groove (2) at the positioning mechanism (6). The label printing mechanism (7) is connected to a label bonding mechanism. The label bonding mechanism includes a label conveying mechanism (8) and a label pressing mechanism (9).

2. The device for labeling the inside of a paper core tube according to claim 1, characterized in that, The core placement assembly (3) includes a mounting frame (301) and multiple V-shaped rollers (302) on the mounting frame (301). The lifting and translating mechanism (5) is located at the bottom of the mounting frame (301). The lifting and translating mechanism (5) includes a lifting mechanism (501) and a translating mechanism (502). The lifting mechanism (501) includes a lifting cylinder, and the lifting direction of the lifting cylinder is vertical. The translating mechanism (502) includes a ball screw, and the ball screw is driven by a servo motor. The mounting frame (301), the lifting mechanism (501), and the translating mechanism (502) are connected sequentially from top to bottom. The discharge mechanism (4) includes a discharge cylinder (401). The top of the discharge cylinder (401) is provided with a discharge plate (402), and the discharge plate (402) is inclined toward the discharge area (102).

3. The device for labeling the inside of a paper core tube according to claim 1, characterized in that, The feeding area (101) includes a feeding plate that is inclined toward the positioning groove (2), and a baffle mechanism (103) is provided on the feeding plate. The discharging area (102) includes a discharging plate that is inclined downward from the positioning groove (2). The baffle mechanism (103) includes a baffle cylinder (104) and a baffle rod assembly (105). The baffle cylinder (104) drives the baffle rod assembly (105) to extend out of the feeding plate or retract below the feeding plate.

4. The device for labeling the inside of a paper core tube according to claim 3, characterized in that, The material blocking rod assembly (105) includes two sets of material blocking rods (106) arranged parallel to the positioning groove (2). The distance between the two sets of material blocking rods (106) is greater than the diameter of one paper core and less than the diameter of two paper cores. The bottom of the two sets of material blocking rods (106) is provided with a connector (107). The connector (107) and the two sets of material blocking rods (106) form a lever structure. The material blocking cylinder (104) is connected to one end of the connector (107).

5. The device for labeling the inside of a paper core tube according to claim 1, characterized in that, The positioning mechanism (6) includes a positioning cylinder (601) and a positioning plate (602). The positioning cylinder is connected to the positioning plate (602). The positioning cylinder (601) drives the positioning plate (602) to move laterally. The positioning plate (602) with a label attaching mechanism has a through hole in the middle. The label attaching mechanism passes through the through hole to attach the label.

6. The device for labeling the inside of a paper core tube according to claim 5, characterized in that, The label conveying mechanism (8) includes, in sequence, a guide assembly (801), a peeling mechanism (802), and a bottom paper recycling roller (803). The guide assembly (801) includes multiple sets of guide roller assemblies and a mounting frame (806). The guide roller assembly includes a guide roller (804) and a bracket (805) connected in sequence. The bracket (805) is detachably connected to the mounting frame (806). The multiple sets of guide roller assemblies are arranged in a Z-shape. The peeling mechanism (802) includes a peeling plate, which forms an acute angle with the through hole.

7. The device for labeling the inside of a paper core tube according to claim 3, characterized in that, The label pressing mechanism (9) includes a label taking component (901), a pressing mechanism (902), and a pressure roller assembly (903). The label taking component (901) includes a label taking rod (904), and a suction cup (905) is provided on the label taking rod (904). The suction cup (905) is connected to a negative pressure system. The pressure roller assembly (903) includes a pressure roller rod (906) and a pressure roller (907) located at the front end of the pressure roller rod (906). The pressing mechanism (902) includes a rotating mechanism (908) and a guide rod cylinder (909). The guide rod cylinder (909) includes a guide rod and a cylinder. The rotating mechanism (908) is located on the guide rod. The label taking rod (904) and the pressure roller rod (906) are respectively sleeved on the rotating mechanism (908). The rotating mechanism (908) drives the label taking rod (904) and the pressure roller rod (906) to form rotating swing arms respectively.

8. The device for labeling the inside of a paper core tube according to claim 2, characterized in that, The lifting cylinder includes a second cylinder and a cylinder piston rod assembly. The cylinder piston rod includes multiple lifting guide rods, which are distributed in parallel.

9. The device for labeling the inside of a paper core tube according to claim 6, characterized in that, The stripping plate is a structural component with polished edges.

10. The device for labeling the inside of a paper core tube according to claim 7, characterized in that, The end of the feed plate away from the positioning groove (2) is provided with a baffle plate (108), and the pressure roller (907) is a polyurethane structural component.

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