Paper feeding device of labeling machine

Abstract

The invention provides a paper feeding device of a labeling machine. The paper feeding device is composed of a paper placing frame and a mechanical arm. A mounting plate of the manipulator can move up and down and back and forth, and is provided with a gluing assembly capable of moving left and right, a suction cup assembly and a paper pressing strip. A paper feeding frame capable of moving back and forth is arranged in front of the paper placing frame, and a pressing roller capable of moving up and down is arranged in front of the paper feeding frame. The device has the advantages that the automation degree is high, all the components cooperate to achieve automatic paper feeding and labeling, and the production efficiency is improved; 2, the precision is high, the manipulator accurately positions and grabs, the gluing is accurate, the compression roller accurately rotates, the separation assembly ensures single-piece taking, and the labeling quality is improved; the adaptability is high, a paper surrounding plate of the paper placing frame, a suction cup assembly, a gluing assembly and the like can be adjusted, and the paper arranging function of the paper feeding frame adapts to different label paper; the reliability is high, and stable operation is ensured through an advanced mechanical structure and a control technology. The invention provides an efficient, accurate and reliable solution for the labeling link in the plastic film bag making industry, and has a wide prospect.

Description

Technical Field

[0001] The invention relates to the technical field of bag making machines, and in particular to a paper feeding device of a labeling machine. Background Art

[0002] In today's industrial production field, plastic film bag making technology has achieved remarkable development. In the processing of plastic film bag making machines, each link is constantly pursuing higher efficiency and quality.

[0003] The final process is to roll the flat bag into a specified number of small rolls using a reel. Just like the garbage bags we use in our daily lives and the packaging bags used in supermarkets, they are all made through this process. The mechanized production at this stage is relatively mature and can stably roll a specified number of bags, greatly improving production efficiency.

[0004] However, in the final labeling process, achieving mechanized production faces many challenges.

[0005] Possible deficiencies of existing labeling machines: Labeling accuracy issues: Some labeling machines in the existing technology may have deficiencies in labeling accuracy. For example, the position of the label may deviate, affecting the appearance quality of the product. For the plastic film bag making industry, the accuracy of the label position is crucial, because inaccurate labeling may cause consumers to misunderstand the product information.

[0006] Labeling speed problem: In the context of large-scale production, labeling speed is a key factor. The speed of some existing labeling machines may not meet the efficient production needs of the plastic film bag making industry. This will not only affect the efficiency of the entire production line, but may also increase production costs.

[0007] Applicability issues: Bags of different specifications and materials have different requirements for labeling machines. Existing labeling machines may have limitations in applicability and cannot adapt to various types of plastic film bags. For example, for bags of some special shapes or materials, the labeling machine may not work properly.

[0008] Problems with coordination with bag making machines: The labeling machine needs to work closely with the plastic film bag making machine to achieve an efficient production process. However, the existing labeling machine may not be ideal in terms of coordination with the bag making machine. This may lead to incoordination in the production process and affect the overall production efficiency.

[0009] Before the label paper is pasted on the film bag, it needs to be glued. How to glue efficiently and with high quality is an urgent problem to be solved. The current gluing method may have the following shortcomings: Uneven glue application: If the glue is not applied evenly, the label will not be firmly attached and will fall off easily. This will not only affect the product quality, but may also cause inconvenience to consumers. For example, during use, the label may fall off due to poor adhesion, affecting consumers' acquisition of product information.

[0010] Low gluing efficiency: Traditional gluing methods may be inefficient and unable to meet the needs of large-scale production. This will extend the production cycle and increase production costs. For example, some gluing equipment may take a long time to complete the gluing process, resulting in the overall speed of the production line being affected.

[0011] The plastic film bag making industry has an urgent need for mechanized production of labeling. On the one hand, with the intensification of market competition, companies need to improve production efficiency and reduce costs to improve product competitiveness. On the other hand, consumers have higher and higher requirements for product quality and appearance. Accurate and beautiful labels can enhance the brand image and market value of products.

[0012] Therefore, how to provide a labeling machine that is different from the existing technology to better meet the needs of the plastic film bag making industry, achieve efficient and accurate labeling operations, and especially solve the difficulties in the label paper gluing process has become an urgent problem to be solved. This new labeling machine needs to make breakthroughs in labeling accuracy, speed, applicability, and coordination with the bag making machine, while ensuring the efficiency and high quality of label paper gluing, providing strong support for the development of the plastic film bag making industry. Summary of the invention

[0013] In view of the problems pointed out in the background technology, the present invention proposes a paper feeding device of a labeling machine to solve the above technical problems.

[0014] The technical solution of the present invention is achieved in this way: A paper feeding device of a labeling machine comprises a paper rack and a manipulator, wherein the manipulator is arranged above the paper rack. The manipulator comprises a mounting plate, and the mounting plate can move up and down and forward and backward; The front and rear sides of the mounting plate are respectively provided with glue-applying components, and the glue-applying components can move left and right to apply glue; Suction cup assemblies are respectively provided on the front and rear sides of the mounting plate; The front and rear sides of the mounting plate are respectively provided with paper pressing strips; A paper feeding rack which can move forward and backward is arranged on the front side of the paper placing rack, and a pressing roller which can move up and down is arranged on the front side of the paper feeding rack.

[0015] The present invention is further configured as follows: the paper feed rack is provided with a through groove running through the upper and lower sides thereof, and a plurality of the through grooves are provided, and the plurality of through grooves are arranged at intervals in the front-to-back direction; a fixed paper straightening strip is provided on the upper side of the left side of the paper feed rack, and the fixed paper straightening strip is arranged along the front-to-back direction; a movable paper straightening strip is provided on the lower side of the right side of the paper feed rack, and the movable paper straightening strip is arranged along the front-to-back direction, and the movable paper straightening strip can move left and right, and a paper straightening arm extending upward is provided on the movable paper straightening strip, and the paper straightening arm passes through the through groove and extends to the upper side of the paper feed rack.

[0016] The present invention is further configured to include a movable frame that can move forward and backward, the paper feeding frame is fixedly arranged on the movable frame, the left and right sides of the front end of the movable frame are respectively provided with movable blocks, the two ends of the pressure roller are respectively rotatably connected to the two movable blocks, and the left and right sides of the front end of the movable frame are respectively provided with cylinders for driving the movable blocks to move up and down.

[0017] The present invention is further configured as follows: the mounting plate includes an intermediate plate, and the front and rear sides of the intermediate plate are respectively connected to a front connecting plate and a rear connecting plate, and the front connecting plate and the rear connecting plate are respectively connected to a suction cup assembly, a paper pressing strip, and a glue coating assembly, the two suction cup assemblies are located in the area between the two paper pressing strips, and the two paper pressing strips are located in the area between the two glue coating assemblies; an upper connecting plate is provided on the upper side of the intermediate plate, and a cylinder three is provided on the upper connecting plate for driving the intermediate plate to move up and down, and the upper connecting plate can move forward and backward.

[0018] The present invention is further configured such that the gluing assembly includes a mounting block, the mounting block is connected to a gluing nozzle, and the front connecting plate and the rear connecting plate are respectively connected to two cylinders for driving the mounting block to move left and right.

[0019] The present invention is further configured to further include a first slide rail arranged along the front-rear direction, a first slider being slidably connected to the first slide rail, and the upper connecting plate being fixedly connected to the first slider.

[0020] The present invention is further configured to include a second slide rail arranged along the front-rear direction, a second slider is slidably connected to the second slide rail, and the movable frame is fixedly connected to the first slider.

[0021] The present invention is further configured such that the suction cup assembly includes a vacuum suction cup, and the position of the vacuum suction cup can be adjusted in the front-rear direction.

[0022] The present invention is further configured such that the front connecting plate and the rear connecting plate can be positionally adjusted in the front-rear direction.

[0023] The present invention is further configured such that the paper placing rack comprises a tray, the middle of the tray is a paper placing area, and adjustable paperboards are respectively provided on the front, back, left, and right sides of the paper placing area.

[0024] By adopting the above technical solution, the beneficial effects of the present invention are as follows: First, the degree of automation is high. Through the coordinated work of the manipulator, paper feeder, pressure roller and other components, the automatic feeding and labeling of label paper is realized, which greatly reduces manual intervention and improves production efficiency.

[0025] Secondly, high precision. The high-precision positioning and grasping ability of the manipulator, the accurate gluing of the gluing component, the precise pressing and rotation of the pressure roller, and the separation component ensure that only one label paper is taken each time, all of which together ensure that the label paper can be accurately pasted on the film bag and improve the labeling quality.

[0026] Furthermore, it has strong adaptability. The paperboard of the paper rack can be moved and adjusted to adapt to label papers of different specifications; the suction cup assembly, glue coating assembly, connecting plate, etc. can all be adjusted in position; the paper straightening function of the paper feeder can also adapt to label papers of different states. These designs enhance the adaptability of the paper feeder to label papers of different specifications and materials.

[0027] Finally, high reliability. The use of advanced mechanical structure and control technology, such as the ingenious design of the separation components and the precise driving of each component, ensures the stable operation of the paper feeding device and reduces the probability of failure. This patent provides an efficient, accurate and reliable solution for the labeling process of the plastic film bag making industry, with broad application prospects and development potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0029] Figure 1 The structure of the present invention is schematically shown Figure 1 .

[0030] Figure 2 The structure of the present invention is schematically shown Figure 2 .

[0031] Figure 3 It is a schematic diagram of the structure of the paper rack, the robot arm and the paper feeding rack of the present invention.

[0032] Figure 4 It is a structural schematic diagram of the paper rack of the present invention.

[0033] Figure 5 The structure of the robot of the present invention is shown in FIG. Figure 1 .

[0034] Figure 6 The structure of the robot of the present invention is shown in FIG. Figure 2 .

[0035] Figure 7 The structure of the paper feeding rack of the present invention is shown in FIG. Figure 1 .

[0036] Figure 8 The structure of the paper feeding rack of the present invention is shown in FIG. Figure 2 .

[0037] Fig. 9 It is a schematic diagram of the structure of the separation component of the present invention. DETAILED DESCRIPTION

[0038] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0039] For reference Figure 1-Figure 9 The present invention is described: Embodiment: A paper feeding device of a labeling machine includes a paper rack 1 and a manipulator 2. The manipulator 2 is arranged above the paper rack 1. The paper rack 1 is used to place label paper, and the manipulator 2 is used to take the label paper on the paper rack 1. A paper feeding rack 4 that can move forward and backward is arranged in front of the paper rack 1. The manipulator 2 takes a piece of label paper each time and moves and places it on the paper feeding rack 4. The paper then moves with the paper feeding rack 4 to be pasted to the rolled film bag to complete the labeling.

[0040] The paper rack 1 is mainly used to place label paper. It provides a stable storage location for the label paper, ensuring that the label paper can be taken at any time during the labeling process.

[0041] The robot 2 is arranged above the paper rack 1 and is one of the core components of the paper feeding device. It has the following main functions: Pick up label paper: The robot can accurately pick up the label paper on the paper rack.

[0042] Moving label paper: The robot can move the picked-up label paper to the specified position. In this paper feeding device, the robot needs to perform a series of complex movement operations. First, the robot moves downward, picks up the label paper, and then moves upward. Then, it moves forward to the position of the paper feeding rack 4, and then moves downward to place the label paper on the paper feeding rack 4. Then, the robot moves upward again, and then moves backward to the upper side of the paper rack 1, and repeats this process. These movement operations require the robot to have precise motion control capabilities to ensure that the label paper can be accurately placed on the paper feeding rack.

[0043] Speed ​​and efficiency: In order to meet the needs of efficient production, the robot must move fast enough. At the same time, the robot's operation process should be as simple and efficient as possible to reduce unnecessary movements and time waste. For example, the robot's work efficiency can be improved by optimizing the robot's motion trajectory and control algorithm.

[0044] A paper feeding rack 4 that can move forward and backward is provided on the front side of the paper placing rack 1. The paper feeding rack 4 plays an important role in the labeling process: Receiving label paper: The robot places the taken label paper on the paper feeding rack 4. The paper feeding rack 4 needs to have a flat surface and a suitable fixing device to ensure that the label paper can be stably placed thereon.

[0045] Moving label paper: The paper feeder 4 can move forward and backward to deliver the label paper to the position where it is pasted with the rolled film bag. The moving speed and accuracy of the paper feeder need to match the production rhythm of the entire labeling machine. The movement of the paper feeder can be controlled by a motor, a transmission device, etc. to ensure that the label paper can accurately reach the pasting position.

[0046] Coordination with other parts: The paper feeder 4 needs to cooperate well with the robot and other parts of the labeling machine. For example, the moving trajectory of the paper feeder should be adapted to the operating range of the robot to ensure that the robot can smoothly place the label paper on the paper feeder. At the same time, the moving speed of the paper feeder should also be coordinated with the conveying speed of the film bag to ensure the smooth progress of the labeling process.

[0047] In summary, the paper feeding device of the labeling machine realizes the automatic paper feeding function of the label paper through the coordinated work of the paper placing rack 1, the manipulator 2 and the paper feeding rack 4. In practical applications, the paper feeding device can greatly improve the production efficiency and labeling accuracy of the labeling machine, and provide strong support for the mechanized production of the plastic film bag making industry.

[0048] The workflow of the paper feeding device of the labeling machine is relatively complex, but efficient and accurate. The following is a further detailed description of its workflow: Initial state: the robot arm 2 is located above the paper rack 1, and the paper feed rack 4 is located at the initial position, waiting to receive label paper.

[0049] The robot takes the label paper: The robot 2 moves downward and accurately locates the label paper position on the paper rack 1. Through the suction cup, it firmly takes a piece of label paper. This process requires high-precision positioning and grasping capabilities to ensure that only one piece of label paper is taken each time.

[0050] The robot moves to the top of the paper feeder: After taking the label paper, the robot 2 moves upward to avoid collision with the paper feeder 1. Then, it moves forward and moves towards the paper feeder 4. This process requires precise motion control to ensure that the robot can accurately reach the top of the paper feeder 4.

[0051] Placing the label paper on the paper feed rack: the robot arm 2 moves downward again and accurately places the taken label paper on the paper feed rack 4.

[0052] The robot returns to the initial position: After placing the label paper, the robot 2 moves upward and leaves the paper feeder 4. Then, it moves backward and returns to the upper side of the paper tray 1, preparing for the next picking operation.

[0053] Paper feeder moves: While the robot returns to its initial position, the paper feeder 4 starts to move forward and backward. It delivers the label paper to the position where it is pasted on the rolled film bag. The moving speed and trajectory of the paper feeder need to match the conveying speed and labeling position of the film bag to ensure that the label can be accurately pasted on the film bag.

[0054] Repeated cycle: When the paper feeding rack 4 completes a paper feeding task, the robot 2 starts a new round of operations of picking up, moving and placing label paper, and the paper feeding rack 4 is also ready to receive the next label paper and move the next time. This cycle is repeated to achieve a continuous labeling and paper feeding process.

[0055] The paper rack 1 includes a tray 11, which is arranged horizontally. The middle of the tray 11 is an area for placing label paper. A stack of label paper is placed on the tray 11. The paper rack 1 is mainly used for placing label paper. It provides a stable storage location for the label paper, ensuring that the label paper can be taken at any time during the labeling process.

[0056] The four sides of the paper placement area, front, back, left, and right, are respectively provided with movable and adjustable paperboards 12. The main function of these paperboards is to limit the label paper and prevent the label paper from moving on the pallet. The paperboards can effectively prevent the label paper from being displaced during transportation or operation, thereby ensuring that the manipulator can accurately pick up the label paper. The paperboard 12 can be moved and adjusted according to the size of the label paper. This design enables the paper placement rack 1 to adapt to label papers of different specifications and sizes, improving the versatility of the paper feeding device. For example, when a smaller-sized label paper needs to be placed, the paperboard can be moved inward to reduce the placement area; when a larger-sized label paper is placed, the paperboard can be moved outward to expand the placement area. The movement and adjustment of the paperboard 12 can be carried out in a variety of ways, such as sliding rails, screw adjustment, etc.

[0057] The manipulator 2 includes a mounting plate that can move up and down and forward and backward. This multi-directional movement capability enables the manipulator to accurately reach different positions and complete operations such as picking up, gluing and placing label paper. The movement of the mounting plate can be achieved by a motor, a transmission device, etc. The design of the mounting plate should take into account its load-bearing capacity and stability. It needs to be able to withstand the weight of components such as the paper pressing strip 3, the gluing component 6 and the suction cup component 7, and remain stable during movement. The mounting plate can be made of a solid metal material, and its strength and rigidity can be improved by structures such as reinforcing ribs.

[0058] A paper pressing strip 3 is provided on the front and rear sides of the mounting plate; when the mounting plate moves downward, the paper pressing strip 3 contacts the label paper and presses the label paper. The function of the paper pressing strip is to fix the label paper during the gluing process to prevent the label paper from moving and ensure the accuracy of gluing. The paper pressing strip can be made of soft materials, such as rubber or silicone, to avoid damage to the label paper. When the mounting plate moves downward, the paper pressing strip 3 can accurately contact the label paper and apply appropriate pressure. After the gluing is completed, the mounting plate moves upward, and the paper pressing strip 3 also leaves the label paper.

[0059] The front and rear sides of the mounting plate are respectively provided with glue-applying components 6, which can move left and right to apply glue; when the paper pressing strip 3 presses the label paper, the glue-applying components 6 move left and right to apply glue on the front and rear ends of the upper side of the label paper. The design of the glue-applying components needs to take into account factors such as the type of glue, the control of the glue amount, and the uniformity of the glue application.

[0060] Suction cup assemblies 7 are provided on the front and rear sides of the mounting plate; after the glue coating is completed, after the suction cup assembly 7 sucks the label paper, the mounting plate moves upward to deliver the label paper to the paper feeding rack 4. This process requires precise motion control to ensure that the label paper can be accurately placed on the paper feeding rack.

[0061] A pressing roller 5 that can move up and down is provided on the front side of the paper feeding rack 4. The paper feeding rack 4 moves forward and approaches the rolled film bag on the rotating shaft, and the pressing roller 5 moves upward to abut against the film bag, pressing and clamping the label paper between the pressing roller 5 and the film bag. At this time, the front end of the label paper is attached to the film bag through the glue on it, and the film bag rotates again, and the pressing roller 5 rotates accordingly. As the film bag rotates, the label paper is rolled on the film bag until the rear end of the label paper is attached and fixed to the film bag. The labeling of the label paper is completed.

[0062] The paper feeder 4 can move forward and backward to deliver the label paper to the position for pasting with the rolled film bag. The moving speed and accuracy of the paper feeder need to match the production rhythm of the entire labeling machine.

[0063] When the paper feeding rack 4 moves forward, the pressing roller 5 can accurately abut against the film bag and apply appropriate pressure. The rotation of the pressing roller 5 needs to be synchronized with the rotation of the film bag to ensure that the label paper can be smoothly wound on the film bag.

[0064] The mounting plate includes a horizontally arranged middle plate 21, which, as the core part of the mounting plate, plays an important role in connecting the front and rear components and carrying other components. It provides a stable mounting base for the front connecting plate 22 and the rear connecting plate 23, ensuring the stability of the entire manipulator structure.

[0065] The front and rear sides of the middle plate 21 are respectively connected with a front connecting plate 22 and a rear connecting plate 23. The two connecting plates are respectively connected with a suction cup assembly 7, a paper pressing strip 3 and a glue coating assembly 6. The design of the front connecting plate and the rear connecting plate enables each component to be reasonably distributed on the mounting plate to achieve coordinated work.

[0066] The front connecting plate 22 and the rear connecting plate 23 are respectively connected with the suction cup assembly 7, the paper pressing strip 3, and the glue coating assembly 6. The two suction cup assemblies 7 are located in the area between the two paper pressing strips 3, and the two paper pressing strips 3 are located in the area between the two glue coating assemblies 6. This position layout ensures that each assembly can work in a predetermined order during operation, thereby improving work efficiency and accuracy.

[0067] An upper connecting plate 24 is provided on the upper side of the middle plate 21. A cylinder 3 25 is provided on the upper connecting plate 24 to drive the middle plate 21 to move up and down. The cylinder 3 25 is fixedly arranged on the upper connecting plate 24. The piston rod of the cylinder 3 25 is fixedly connected to the middle plate 21, and the upper connecting plate 24 can move forward and backward. Through the telescopic movement of the cylinder 3, the up and down movement of the middle plate can be accurately controlled, thereby driving the various components installed on the front and rear sides of the middle plate to perform corresponding operations.

[0068] The upper connecting plate 24 can move forward and backward. In order to realize the forward and backward movement of the upper connecting plate, it also includes a first slide rail 25 arranged along the forward and backward direction, and a first slider 26 is slidably connected to the first slide rail 25. The upper connecting plate 24 is fixedly connected to the first slider 26. This combination structure of the slide rail and the slider ensures the stability and accuracy of the upper connecting plate during the forward and backward movement.

[0069] The paper pressing strip 3 is in the shape of a long strip, and the paper pressing strip 3 is arranged in the left-right direction. The design of this shape and direction can better contact with the label paper, effectively press the label paper, and prevent it from moving during the gluing and transportation process. The paper pressing strip 3 is connected to the front connecting plate 22 or the rear connecting plate 23 through a connecting rod. The paper pressing strip 3 moves with the middle plate 21. This connection method allows the paper pressing strip to be stably mounted on the manipulator and can move with the movement of the middle plate 21. When the middle plate moves up and down, the paper pressing strip can also accurately contact or leave the label paper.

[0070] The suction cup assembly 7 includes a vacuum suction cup 71, the lower end of which is a suction cup, and the upper end is connected to a vacuum pump or a vacuum generator. The negative pressure generated by the vacuum pump or the vacuum generator enables the vacuum suction cup to firmly absorb the label paper. In this way, the position of the vacuum suction cup sucking the label paper can be flexibly adjusted according to the label paper of different sizes and specific operation requirements to ensure the stability and accuracy of the suction. The suction cup assembly 7 moves with the middle plate 21. When the middle plate moves up and down or moves forward and backward, the suction cup assembly also moves accordingly to realize the operations of picking up, carrying and placing the label paper.

[0071] The gluing assembly 6 includes a mounting block 61, to which a gluing nozzle 62 is connected, and a cylinder 2 63 for driving the mounting block 61 to move left and right is respectively connected to the front connecting plate 22 and the rear connecting plate 23. The gluing nozzle 62 is driven to move left and right by the cylinder 2 63 to apply glue to the front and back ends of the upper side of the label paper. The gluing nozzle 62 is vertically arranged, the lower end of the gluing nozzle 62 is a glue outlet, and the upper end of the gluing nozzle 62 is connected to a glue supply device. The glue supply device provides glue to the gluing nozzle to ensure the smooth progress of the gluing process. The gluing nozzle is driven to move left and right by the telescopic movement of the cylinder 2, and the front and back ends of the upper side of the label paper are applied with glue. This driving method can accurately control the moving position and speed of the gluing nozzle to ensure the uniformity and accuracy of the gluing.

[0072] The front connecting plate 22 and the rear connecting plate 23 can both be adjusted in the front-rear direction. This position adjustment function can adjust the relative position of the suction cup assembly and the glue coating assembly according to different label paper sizes and operation requirements, thereby improving the adaptability and operation accuracy of the manipulator.

[0073] The paper feeding rack 4 is a horizontally arranged plate structure, which provides a stable conveying platform for label paper.

[0074] The paper feeding rack 4 is provided with a through slot 41 penetrating through the upper and lower sides thereof. There are a plurality of through slots 41 , and the plurality of through slots 41 are spaced apart in the front-to-back direction. The through slots provide channels for the movement of the paper straightening arm 44 .

[0075] A fixed paper-straightening strip 42 is provided on the upper side of the left side of the paper feeding rack 4. The fixed paper-straightening strip 42 is in the shape of a long strip and is arranged along the front-to-back direction; a movable paper-straightening strip 43 is provided on the lower side of the right side of the paper feeding rack 4. The movable paper-straightening strip 43 is in the shape of a long strip and is arranged along the front-to-back direction. The movable paper-straightening strip 43 can move left and right. An upwardly extending paper-straightening arm 44 is provided on the movable paper-straightening strip 43. The paper-straightening arm 44 passes through the through-slot 41 and extends to the upper side of the paper feeding rack 4. A plurality of paper-straightening arms 44 are provided, and a plurality of paper-straightening arms 44 are arranged at intervals in the length direction of the movable paper-straightening strip 43. One paper-straightening arm 44 correspondingly extends into one through-slot 41. The movable paper-straightening strip 43 moves left and right, driving the paper-straightening arm 44 to move in the through-slot 41. The paper-straightening arm 44 cooperates with the fixed paper-straightening strip 42 to sort the label paper on the paper feeding rack 4 so that the label paper can be aligned with the subsequent film bag. The fixed paper strip 42 is an alignment position aligned with the film bag, and the paper aligning arm 44 drives the label paper to approach the fixed paper strip 42, thus completing the arrangement of the label paper.

[0076] The bottom of the paper feeding rack 4 is provided with a cylinder for driving the mobile whole paper strip 43 to move left and right. Through the telescopic movement of the cylinder, the position of the mobile whole paper strip is accurately controlled, thereby realizing the arranging operation of the label paper.

[0077] It also includes a movable frame 45 that can move forward and backward, the paper feeding frame 4 is fixedly arranged on the movable frame 45, the left and right sides of the front end of the movable frame 45 are respectively provided with movable blocks 46, the two ends of the pressing roller 5 are respectively rotatably connected with the two movable blocks 46, and the left and right sides of the front end of the movable frame 45 are respectively provided with cylinders 1 47 for driving the movable blocks 46 to move up and down. The cylinder 1 47 drives the pressing roller 5 to move up and down, realizes the contact and separation between the pressing roller and the film bag, and completes the pressing operation during the labeling process.

[0078] It also includes a second slide rail 48 arranged in the front-to-back direction, a second slider 49 is slidably connected to the second slide rail 48, and the moving frame 45 is fixedly connected to the first slider 26. Through the combined structure of the slide rail and the slider, the stability and accuracy of the moving frame during the front-to-back movement are ensured, so that the label paper is accurately transported to the position for pasting with the film bag.

[0079] The workflow of the paper feeding device of the labeling machine is relatively complex, but efficient and accurate. The following is a further detailed description of its workflow: Initial state: The upper connecting plate 24 of the manipulator 2 is in the initial position, and the middle plate 21 and the components mounted thereon are in a standby state. The paper feed rack 4 is in the initial position, and the pressure roller 5 is in the lower position, waiting to receive the label paper. The surrounding paper board 12 is adjusted in position according to the size of the label paper to ensure that the label paper is stably placed on the tray 11.

[0080] The manipulator is ready to take the label paper: the cylinder 3 25 drives the middle plate 21 to move downward, driving the paper pressing strips 3 on the front connecting plate 22 and the rear connecting plate 23 to contact the label paper and press the label paper.

[0081] Gluing operation: According to the size and requirements of the label paper, adjust the position of the front connecting plate and the rear connecting plate to make the glue spray head 62 in a suitable position (adjustment is completed in advance). Then, the cylinder 2 63 drives the mounting block 61 to move left and right, driving the glue spray head to apply glue on the front and back ends of the upper side of the label paper. In this process, the paper pressing strip 3 maintains the fixing effect on the label paper to prevent the label paper from moving and ensure the accuracy of glue coating.

[0082] Suctioning label paper: After gluing, adjust the position of the vacuum suction cup 71 according to the size and position of the label paper (adjustment is done in advance). Then, the vacuum pump or vacuum generator works to make the vacuum suction cup 71 suck the label paper.

[0083] The robot moves the label paper: the cylinder 3 25 drives the middle plate 21 to move upwards to lift the label paper. Then, the upper connecting plate 24 moves forward along the first slide rail 25 to deliver the label paper to the top of the paper feeding rack 4.

[0084] Placing label paper: The suction cup assembly 7 releases the label paper and places it on the paper feed rack 4.

[0085] Label paper arrangement: The cylinder at the bottom of the paper feeding rack 4 drives the movable paper strip 43 to move left and right, driving the paper arrangement arm 44 to move in the through slot 41. The paper arrangement arm 44 cooperates with the fixed paper strip 42 to arrange the label paper on the paper feeding rack 4 so that the label paper is aligned with the subsequent film bag.

[0086] Movement of the paper feeding rack: The moving rack 45 moves forward along the second slide rail 48, driving the paper feeding rack 4 to move forward, and conveying the label paper to the position for pasting with the rolled film bag.

[0087] Pressing roller operation: Cylinder 1 47 drives moving block 46 to move upward, driving pressing roller 5 to move upward and abut against the film bag, pressing and clamping the label paper between pressing roller 5 and the film bag. At this time, the front end of the label paper is attached to the film bag through the glue on it.

[0088] Labeling process: The film bag rotates, and the pressing roller 5 rotates accordingly. As the film bag rotates, the label paper is wound on the film bag until the rear end of the label paper is adhered and fixed to the film bag. The labeling of the label paper is completed.

[0089] Repeated cycle: When the paper feeding rack 4 completes a paper feeding task, the robot 2 starts a new round of operations of picking up, gluing, moving and placing label paper, and the paper feeding rack 4 and the pressure roller 5 are also ready to receive the next label paper and perform the next labeling operation. This cycle is repeated to achieve a continuous labeling and paper feeding process. The surrounding paper board 12 always keeps the restriction effect on the label paper in this process to ensure that the position of the label paper on the tray 11 is stable.

[0090] This complex and orderly workflow enables the paper feeding device of the labeling machine to efficiently complete the tasks of conveying and labeling label paper, providing reliable technical support for the labeling process of the plastic film bag making industry.

[0091] A separation assembly is provided on the lower side of the middle plate 21, and the separation assembly includes a rotating plate 72 and a separation spring 73. The rotating plate 72 is rotatably provided on the lower side of the middle plate 21, and the rotating plate 72 is circular. A driving device for driving the rotating plate 72 to rotate is provided on the middle plate 21. The separation spring 73 is vertically provided, and the upper end of the separation spring 73 is fixedly connected to the rotating plate 72. The driving device is for inching control of the rotating plate 72 to rotate, and the rotating plate 72 rotates 180 degrees each time. A through hole corresponding to the separation spring 73 is provided on the label paper, and the through holes on the two adjacent label papers are symmetrically arranged about the center of the rotating plate 72. The initial separation spring 73 corresponds to the through hole on the label paper on the upper side. When the label paper on the upper side is sucked away, the separation spring 73 applies force to the label paper on the lower side to separate the upper and lower label papers. After the label paper on the upper side is sucked away, the rotating plate 72 rotates 180 degrees, and the separation spring 73 corresponds to the through hole on the label paper on the lower side. The operation is cyclical. Each time the label paper is taken, the separation spring 73 can pass through the through hole on the label paper on the upper side to apply force to the label paper on the lower side, so that the upper and lower label papers can be separated.

[0092] The separation component plays a vital role in ensuring that only one label paper is taken at a time to avoid multiple sheets sticking together, thereby ensuring the accuracy and efficiency of the labeling process.

[0093] The rotating plate is circular and rotatably arranged on the lower side of the middle plate 21. The design of this position enables the rotating plate to separate the label paper at a suitable position.

[0094] A driving device for driving the rotating plate to rotate is provided on the middle plate 21. The driving device is a jog control, which can accurately control the rotation angle and timing of the rotating plate. The driving device can use a small stepping motor as a driving device. The stepping motor has the ability to accurately control the angle, and can be programmed to realize jog control of the rotating plate 72 to rotate a specific angle, such as 180 degrees each time. The control system can use a microcontroller or a PLC (programmable logic controller). The number of steps and direction of rotation of the motor are set by programming to accurately control the position of the rotating plate. At the same time, a sensor can be added to detect the actual position of the rotating plate to realize closed-loop control and improve the accuracy of rotation. For example, when the manipulator is ready to take the label paper, the control system sends a signal to the stepping motor to rotate it 180 degrees, driving the separation spring 73 to correspond to the through hole on the lower label paper.

[0095] The separation spring is arranged vertically, and the upper end is fixedly connected to the rotating plate 72. This installation mode ensures that the separation spring can play a role stably during operation.

[0096] The label paper is provided with a through hole corresponding to the separation spring. The through holes on the two adjacent label papers are symmetrically arranged about the center of the rotating plate. This design enables the separation spring to accurately pass through the through hole on the upper label paper, exert force on the lower label paper, and realize the separation function.

[0097] Initially, the separation spring 73 corresponds to the through hole on the label paper on the upper side. At this moment, the separation spring is in a ready state, waiting for the upper label paper to be sucked and taken away.

[0098] When the label paper on the upper side is sucked away, the separation spring applies force to the label paper on the lower side. Due to the vertical arrangement of the separation spring and the fixed connection with the rotating plate, it can exert a certain pressure downward to separate the upper and lower label papers.

[0099] After the label paper on the upper side is sucked and taken away, the driving device inching controls the rotating plate 72 to rotate 180 degrees. Like this, the separation spring 73 corresponds to the through hole on the label paper on the lower side, and is ready for taking the label paper next time.

[0100] In this cyclic operation, each time the label paper is taken, the separation spring can pass through the through hole on the upper label paper to apply force to the lower label paper, so that the upper and lower label papers can be separated. This cyclic operation ensures that the paper feeding device can continuously and stably separate and take the label paper.

[0101] The existence of the separation component ensures that the robot can only take one label paper at a time, avoiding the situation where multiple labels are sucked at the same time. This is crucial for the accurate labeling of the labeling machine, ensuring the accurate positioning and pasting quality of the label. By automatically separating the label paper, the need for manual intervention is reduced and the working efficiency of the labeling machine is improved. At the same time, the design of the cyclic operation makes the separation process fast and stable, which can meet the requirements of high-speed production.

[0102] The separation component works closely with the suction cup component 7 of the manipulator. When the suction cup component sucks the upper label paper, the separation spring works to ensure that the lower label paper will not be taken away together. At the same time, the movement and operation of the manipulator also need to be coordinated with the working rhythm of the separation component to achieve an efficient paper feeding and labeling process.

[0103] Label paper contact process: As the middle plate 21 and the separation spring 73 move downward, the separation spring 73 will eventually contact the label paper. At this time, the position and state of the separation spring 73 are crucial for the subsequent separation operation. Because only when the separation spring 73 accurately contacts the label paper can the effective separation of the label paper be achieved based on its own characteristics and the cooperation with other components.

[0104] Label paper compression phenomenon: After contacting the label paper, the separation spring 73 will be compressed due to the force of the middle plate 21 continuing to move downward. The compression characteristics of the spring play a key role here. It can store a certain amount of elastic potential energy to provide the necessary restoring force for subsequent separation of the label paper. This restoring force will help the separation spring 73 to apply appropriate force to the label paper to achieve the separation of the upper and lower labels.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A paper feeding device for a labeling machine, comprising a paper placing rack (1) and a manipulator (2), wherein the manipulator (2) is arranged above the paper placing rack (1), and is characterized in that: The manipulator (2) comprises a mounting plate, and the mounting plate can move up and down and forward and backward; The front and rear sides of the mounting plate are respectively provided with glue coating components (6), and the glue coating components (6) can move left and right to perform glue coating; Suction cup assemblies (7) are respectively provided on the front and rear sides of the mounting plate; The front and rear sides of the mounting plate are respectively provided with paper pressing strips (3); The front side of the paper placing rack (1) is provided with a paper feeding rack (4) that can move forwards and backwards, and the front side of the paper feeding rack (4) is provided with a pressure roller (5) that can move up and down.

2. The paper feeding device of a labeling machine according to claim 1, characterized in that: The paper feeding rack (4) is provided with a through slot (41) penetrating through the upper and lower sides thereof, and a plurality of the through slots (41) are provided, and the plurality of through slots (41) are arranged at intervals in the front-to-back direction; a fixed paper straightening strip (42) is provided on the upper side of the left side of the paper feeding rack (4), and the fixed paper straightening strip (42) is arranged along the front-to-back direction; a movable paper straightening strip (43) is provided on the lower side of the right side of the paper feeding rack (4), and the movable paper straightening strip (43) is arranged along the front-to-back direction, and the movable paper straightening strip (43) can move left and right, and a paper straightening arm (44) extending upward is provided on the movable paper straightening strip (43), and the paper straightening arm (44) passes through the through slot (41) and extends to the upper side of the paper feeding rack (4).

3. The paper feeding device of a labeling machine according to claim 2, characterized in that: The invention also comprises a movable frame (45) which can be moved forward and backward, the paper feeding frame (4) being fixedly arranged on the movable frame (45), movable blocks (46) being respectively arranged on the left and right sides of the front end of the movable frame (45), the two ends of the pressing roller (5) being respectively rotatably connected to the two movable blocks (46), and cylinders (47) for driving the movable blocks (46) to move up and down being respectively arranged on the left and right sides of the front end of the movable frame (45).

4. The paper feeding device of a labeling machine according to claim 1, characterized in that: The mounting plate comprises an intermediate plate (21), the front and rear sides of the intermediate plate (21) are respectively connected to a front connecting plate (22) and a rear connecting plate (23), the front connecting plate (22) and the rear connecting plate (23) are respectively connected to a suction cup assembly (7), a paper pressing strip (3), and a glue coating assembly (6), the two suction cup assemblies (7) are located in an area between the two paper pressing strips (3), and the two paper pressing strips (3) are located in an area between the two glue coating assemblies (6); an upper connecting plate (24) is provided on the upper side of the intermediate plate (21), and a cylinder (25) is provided on the upper connecting plate (24) for driving the intermediate plate (21) to move up and down, and the upper connecting plate (24) can move forward and backward.

5. The paper feeding device of a labeling machine according to claim 4, characterized in that: The glue coating assembly (6) comprises a mounting block (61), the mounting block (61) is connected to a glue coating nozzle (62), and the front connecting plate (22) and the rear connecting plate (23) are respectively connected to two cylinders (63) for driving the mounting block (61) to move left and right.

6. The paper feeding device of a labeling machine according to claim 4, characterized in that: It also comprises a first slide rail (25) arranged along the front-rear direction, a first sliding block (26) being slidably connected to the first slide rail (25), and the upper connecting plate (24) being fixedly connected to the first sliding block (26).

7. The paper feeding device of a labeling machine according to claim 3, characterized in that: It also includes a second slide rail (48) arranged along the front-to-back direction, a second slider (49) being slidably connected to the second slide rail (48), and the movable frame (45) is fixedly connected to the first slider (26).

8. The paper feeding device of a labeling machine according to claim 4, characterized in that: The suction cup assembly (7) comprises a vacuum suction cup (71), and the position of the vacuum suction cup (71) can be adjusted in the front-rear direction.

9. The paper feeding device of a labeling machine according to claim 4, characterized in that: The front connecting plate (22) and the rear connecting plate (23) can both be adjusted in position in the front-rear direction.

10. The paper feeding device of a labeling machine according to claim 1, characterized in that: The paper placing rack (1) comprises a tray (11), the middle of the tray (11) is a paper placing area, and adjustable paperboards (12) are respectively provided on the front, back, left, and right sides of the paper placing area.

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