Automatic labelling device in a packaging machine

Abstract

The utility model provides a kind of automatic labeling device in packaging machine, and the device includes mounting plate, unwinding shaft, winding shaft, guide plate and sponge roller. Among them, mounting plate is fixed to the side of the feed hopper of packaging machine, guide plate is fixed to the side of mounting plate, and guide plate is inclined relative to mounting plate, and the lower end of guide plate forms the peeling edge for realizing the separation of label and backing paper. Unwinding shaft and winding shaft are all connected in the side of mounting plate, label roll is wrapped outside unwinding shaft, and driving motor drives winding shaft to rotate to wind the backing paper of label roll. When working, the stable separation of label and backing paper is realized by the direction change of upward traction backing paper of winding shaft, and then the firmness of label and packaging film is guaranteed by the compacting effect of sponge roller to label. In addition, label sensor can detect label, and driving motor is controlled to open and close by controller, so that labeling process and cutting and packaging process of packaging machine are accurately synchronized, and the working effect of automatic labeling is effectively optimized and practical value is improved.

Description

Technical Field

[0001] This utility model relates to the field of automatic labeling technology, and in particular to an automatic labeling device for a packaging machine. Background Technology

[0002] In the field of automated packaging for products such as food and pharmaceuticals, labeling is typically performed simultaneously during the packaging process to facilitate product identification and traceability. Existing packaging machines generally possess automated labeling capabilities to meet the demands of continuous production. Their common operating method is as follows: a packaging film is placed outside the feeding hopper and conveyed from top to bottom. Material (such as tea leaves) is fed into the hopper from above via a vibrating disc or similar means. The material continuously falls from the hopper into the pre-sealed packaging film at the bottom and sides. Once the material reaches the required quantity, the packaging film continues to move downwards. The packaging machine's sealing mechanism then seals the top of the current bag, and the cutting mechanism cuts the film from the middle of this seal. This completes the sealing of a single transparent bag containing a fixed quantity of material, and also ensures that the bottom of the subsequent packaging film is pre-sealed after cutting, facilitating the next round of material filling and packaging, thus achieving automated continuous packaging.

[0003] However, the labeling devices that come with existing packaging machines are prone to problems such as labels sticking to the backing paper or incomplete separation during the label-backing paper separation process. This makes it impossible to guarantee the labeling action, which in turn affects the consistency and overall quality of product packaging and makes it difficult to meet the labeling stability requirements of automated production. Utility Model Content

[0004] To address the shortcomings mentioned above in the background technology, this utility model provides an automatic labeling device for packaging machines.

[0005] The present invention adopts the following technical solution: An automatic labeling device for a packaging machine, the device comprising: Mounting plate fixed to one side of the feed hopper; A roll of label material is fitted over the unwinding shaft that rotates on one side of the mounting plate. A take-up shaft is connected to one side of the mounting plate and rotates, the take-up shaft being closer to the feed hopper than the unwind shaft; A guide plate is fixed to one side of the mounting plate, the guide plate is inclined relative to the mounting plate, and the lower end of the guide plate is a peeling edge, the peeling edge is located below the winding shaft; A sponge roller is disposed below the guide plate, and the surface of the sponge roller is closer to the feed hopper than the peeling edge; After the label roll is pulled out, it passes under the guide plate and then winds upwards from the peeling edge to the take-up shaft. The rotation of the take-up shaft drives the label roll to be pulled towards the take-up shaft through the peeling edge.

[0006] In one possible implementation, the mounting plate fixes the screw, the guide plate is provided with mounting holes through both sides, the mounting holes are sleeved on the fixing screw, and the fixing screw is threaded with nuts on both sides of the guide plate, so that the nuts are pressed against the side of the guide plate.

[0007] In one possible implementation, both sides of the guide plate are fixed with connectors, the sponge roller is located between the two connectors, and the two ends of the roller shaft of the sponge roller pass through the two connectors respectively, so that the sponge roller is located below the peeling edge, and there is a gap between the sponge roller and the peeling edge.

[0008] In one possible implementation, the device further includes a drive motor fixed to the mounting plate, which drives the take-up shaft to rotate.

[0009] In one possible implementation, the device further includes a label sensor fixed on the back of the guide plate at a position corresponding to the label. When the label sensor detects a label, it sends a bonding completion signal to the controller of the packaging machine. The controller then sends a pause signal to the drive motor based on the signal to control the drive motor to pause.

[0010] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages: In the structure of this utility model, the mounting plate provides a stable bearing foundation for the unwinding shaft, the rewinding shaft, the guide plate, and the sponge roller, ensuring the structural reliability of the coordinated work of each component. Specifically, the positional arrangement of the unwinding shaft and the rewinding shaft makes the traction path of the label roll more reasonable. The inclined setting of the guide plate, combined with the peeling edge at its lower end, forms a key structure adapted to label separation. Specifically, when the rewinding shaft rotates and pulls the backing paper of the label roll past the peeling edge, the backing paper is forced to change its direction of movement. The resulting targeted force can accurately act on the adhesive interface between the label and the backing paper, breaking the adhesive state between the backing paper and the label, achieving stable separation of the label and the backing paper, thus meeting the requirements of automated production for labeling stability and ensuring the consistency and overall quality of product packaging. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention installed at the feed hopper of a packaging machine.

[0012] Figure 2This is a three-dimensional structural diagram of the present invention, viewed from a rearward angle from the front of the feed hopper.

[0013] Figure 3 for Figure 2 A magnified diagram of point A in the middle.

[0014] Figure 4 for Figure 2 A magnified diagram of point B in the middle.

[0015] Figure 5 This is a side view of the present invention located behind the front of the feed hopper.

[0016] Figure 6 for Figure 5 A magnified diagram of point C.

[0017] Figure 7 A three-dimensional structural diagram of the guide plate connected to the sponge roller, viewed from below. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0019] In this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, used to describe and clarify relative positions, and can change accordingly depending on the orientation of the components in the accompanying drawings.

[0020] This utility model provides an automatic labeling device for a packaging machine, as shown in the attached figure. Figure 1 , 2 As shown in Figure 5, the device includes a mounting plate 2, an unwinding shaft 3, a rewinding shaft 4, a guide plate 5, and a sponge roller 6. The mounting plate 2 is fixed to the frame of the packaging machine and is located on one side of the feed hopper 1. Both the unwinding shaft 3 and the rewinding shaft 4 are connected to one side of the mounting plate 2, with the rewinding shaft 4 positioned closer to the feed hopper 1 than the unwinding shaft 3. The guide plate 5 is fixed to one side of the mounting plate 2 and is inclined relative to the mounting plate 2. (See Appendix 5 for further details.) Figures 5 to 7 The lower end of the guide plate 5 forms a peeling edge 502 for separating the label 72 from the backing paper 71, and this peeling edge 502 is located below the take-up shaft 4. The sponge roller 6 is disposed below the guide plate 5, and the surface of the sponge roller 6 is closer to the feed hopper 1 than the peeling edge 502.

[0021] In addition, the side of the mounting plate 2 facing away from the feed hopper 1 is also connected to the connecting plate 21 by a screw. This utility model also includes a drive motor 8, which is fixed to the connecting plate 21 and fixed relative to the mounting plate 2. The output shaft of the drive motor 8 is connected to the drive shaft 4 through a coupling to drive the take-up shaft 4 to rotate, so that the take-up shaft 4 maintains a stable speed, providing reliable power support for the continuous traction of the label roll 7, and ensuring the stable peeling of the label 72 and the subsequent labeling process.

[0022] In operation, the label roll 7 is fitted over the unwinding shaft 3. The backing paper 71 in the label roll 7 is pulled out, passes under the guide plate 5, and then winds upwards along the peeling edge 502 to the take-up shaft 4. After the drive motor 8 starts, it drives the take-up shaft 4 to rotate. The take-up shaft 4 generates a traction force through the winding action of the backing paper 71, continuously pulling the backing paper 71 out of the label roll 7. This causes the label 72 and the backing paper 71 to move from the bottom surface of the guide plate 5, past the peeling edge 502, towards the take-up shaft 4. During this traction process, the take-up shaft 4 forcibly changes the direction of movement of the backing paper 71 as it pulls upwards. This upward winding traction force acts on the adhesive interface between the label 72 and the backing paper 71, breaking the adhesive force between them, thus achieving stable separation of the label 72 and the backing paper 71, thereby completing the peeling operation of the label 72 from the backing paper 71. (See attached diagram.) Figure 6 After separation, the label 72 is affixed to the surface of the packaging film 10 and descends along the feed hopper 1 to the sponge roller 6. The sponge roller 6 presses the label 72 tightly against the surface of the packaging film 10 through its contact with the packaging film 10. The above process achieves efficient separation of the label 72 from the backing paper 71 by changing the traction direction of the winding shaft 4, while the pressing action of the sponge roller 6 ensures the firmness of the adhesion between the label 72 and the packaging film 10, thus ensuring the reliability and stability of the entire labeling process.

[0023] Please refer to the appendix. Figure 3 The mounting plate 2 is fixed with screws 51, and the guide plate 5 is provided with mounting holes 501 extending through both sides. The mounting holes 501 are fitted onto the screws 51, and nuts 52 are threaded onto both sides of the guide plate 5. By tightening the nuts 52 to press against the side of the guide plate 5, the guide plate 5 can be reliably fixed. In this structural design, by loosening the nuts 52, the fixing constraint on the guide plate 5 can be released, thereby adjusting the tilt angle of the guide plate 5 relative to the feed hopper 1, so as to meet the adaptation requirements of the label 72 peeling angle under different working conditions. Furthermore, the mounting holes 501 are set as strip holes. The cooperation structure between the strip holes and the screws 51 allows the guide plate 5 to move relative to the screws 51 along the length of the strip holes, thereby adjusting the distance of the peeling edge 502 relative to the feed hopper 1. This adjustable structure effectively improves the flexibility of the device, can adapt to different specifications of packaging film 10 or label roll 7, and ensures the accuracy of label 72 peeling and bonding in various application scenarios.

[0024] Please refer to the appendix. Figure 4 Connectors 61 are fixed on both sides of the guide plate 5. The sponge roller 6 is located between the two connectors 61, with both ends of the roller shaft of the sponge roller 6 passing through the two connectors 61 respectively, so that the sponge roller 6 is located below the peeling edge 502, and there is a gap between the sponge roller 6 and the peeling edge 502. The backing paper 71 of the label roll 7 passes through the bottom surface of the guide plate 5 and then smoothly passes through the gap, effectively preventing the backing paper 71 from shifting or getting stuck during the traction process. Furthermore, the connectors 61 and the guide plate 5 are detachably connected by bolts. By adjusting the tightness of the bolts, the angle of the connector 61 relative to the guide plate 5 can be changed, which can drive the sponge roller 6 to change the distance relative to the peeling edge 502, thereby adapting to the tightness requirements of the label 72 for packaging bags of different lengths. This ensures that the sponge roller 6 can effectively press the label 72 during the labeling operation of packaging bags of different specifications, ensuring the firmness and consistency of the label 72.

[0025] In addition, as attached Figure 2 , 4 As shown in Figure 7, this utility model also includes a label sensor 9, which is fixed on the back of the guide plate 5 at a position corresponding to the label 72. The label sensor 9 is electrically connected to the controller of the packaging machine to achieve signal linkage. The controller controls the start and stop of the drive motor 8 based on the signal from the label sensor 9. Preferably, the label sensor 9 is a reflective photoelectric sensor, and the controller is a PLC controller.

[0026] Initially, the drive motor 8 is paused. When the packaging machine completes the previous round of cutting and sealing and resumes the conveying of the packaging film 10, the controller synchronously sends a start signal to the drive motor 8. The drive motor 8 then starts and drives the take-up shaft 4 to rotate, generating a continuous traction force through the take-up backing paper 71. This traction force breaks the adhesive force between the label 72 and the backing paper 71 to achieve stable separation. After separation, the label 72 moves downward along the feed hopper 1 with the packaging film 10 and passes through the sponge roller 6. Since the labels 72 are arranged at a preset equal interval, when the label sensor 9 detects a label 72 during this process, it can be determined that the labels 72 at the corresponding equal interval positions below it have been completely adhered, based on the equal interval layout of the labels 72. Upon reaching the packaging film 10, the label sensor 9 immediately sends a signal indicating that the bonding is complete to the controller. Based on this signal, the controller sends a pause signal to the drive motor 8, and the rewind shaft 4 stops pulling the bottom paper 71 to ensure that both the bottom paper 71 and the label 72 remain stationary during the packaging process. At the same time, the material is fed into the feed hopper 1 and falls into the pre-sealed packaging film 10 at the bottom. Once the material reaches the quantitative standard, the packaging machine triggers the packaging film to stop conveying downwards. The packaging mechanism of the packaging machine simultaneously seals the upper part of the current packaging bag, and the cutting mechanism cuts the packaging film 10 from the middle of the seal. This completes the sealing of a single transparent packaging bag containing a quantitative amount of material and also ensures that the bottom of the subsequent packaging film 10 naturally forms a pre-sealed state after the cut. When the packaging machine finishes cutting and sealing and is ready to enter the next round of packaging, it sends a start signal to the drive motor 8 again. The drive motor 8 restarts and drives the rewind shaft 4 to continue pulling the bottom paper 71. The label sensor 9 simultaneously detects the next label 72 that has been peeled off and attached to the packaging film 10. This cycle is repeated to achieve precise synchronization and continuous operation of the labeling and packaging process. The above method uses the precise sensing of the label sensor 9 to realize the timely pause of the rewind of the bottom paper 71, effectively avoiding material waste caused by label misalignment or extra feeding, while ensuring the stability and accuracy of the labeling operation.

[0027] In summary, this utility model, through the rational layout of the unwinding shaft 3, the rewinding shaft 4, the guide plate 5, and the sponge roller 6, achieves efficient and stable separation of the label 72 from the backing paper 71 by utilizing the upward pulling direction change of the rewinding shaft 4. Furthermore, the pressing action of the sponge roller 6 on the label 72 ensures the firm adhesion between the label 72 and the packaging film 10. The transmission connection between the drive motor 8 and the rewinding shaft 4 provides reliable and stable power support for the traction of the label roll 7. The signal linkage between the label sensor 9, the controller, and the drive motor 8 can detect the adhesion status of the label 72 and control the start and stop of the drive motor 8, ensuring precise synchronization between the labeling process and the cutting and sealing process of the packaging machine. This avoids material waste caused by label misalignment or extra transport, and comprehensively ensures the stability, accuracy, and continuity of the entire labeling operation, effectively optimizing the automated labeling operation and enhancing its practical value.

[0028] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using the concept of this utility model shall be considered as an infringement of the protection scope of this utility model.

Claims

1. An automatic labeling device for a packaging machine, characterized in that, The device includes: Mounting plate fixed to one side of the feed hopper; A roll of label material is fitted over the unwinding shaft that rotates on one side of the mounting plate. A take-up shaft is connected to one side of the mounting plate and rotates, the take-up shaft being closer to the feed hopper than the unwind shaft; A guide plate is fixed to one side of the mounting plate, the guide plate is inclined relative to the mounting plate, and the lower end of the guide plate is a peeling edge, the peeling edge is located below the winding shaft; A sponge roller is disposed below the guide plate, and the surface of the sponge roller is closer to the feed hopper than the peeling edge; After the label roll is pulled out, it passes under the guide plate and then winds upwards from the peeling edge to the take-up shaft. The rotation of the take-up shaft drives the label roll to be pulled towards the take-up shaft through the peeling edge.

2. The apparatus as claimed in claim 1, characterized in that, The mounting plate is fixed with screws, and the guide plate is provided with mounting holes that pass through both sides. The mounting holes are sleeved on the fixed screws, and the fixed screws are threaded with nuts on both sides of the guide plate, so that the nuts are pressed against the side of the guide plate.

3. The apparatus as described in claim 1, characterized in that, Both sides of the guide plate are fixed with connecting parts. The sponge roller is located between the two connecting parts. The two ends of the roller shaft of the sponge roller pass through the two connecting parts respectively, so that the sponge roller is located below the peeling edge, and there is a gap between the sponge roller and the peeling edge.

4. The apparatus as claimed in claim 1, characterized in that, The device also includes a drive motor, which is fixed to the mounting plate and drives the take-up shaft to rotate.

5. The apparatus as described in claim 4, characterized in that, The device also includes a label sensor, which is fixed on the back of the guide plate at the position corresponding to the label. When the label sensor detects a label, it sends a bonding completion signal to the controller of the packaging machine. The controller then sends a pause signal to the drive motor based on the signal to control the drive motor to stop.

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