Automatic winding device for food packaging film processing

Abstract

The application relates to the technical field of film material winding technology, in particular to an automatic winding device for food packaging film processing, which comprises a rack, the rack is detachably connected with an expansion shaft, a transfer mechanism for conveying the expansion shaft, a lifting frame is vertically and slidingly connected to the rack, a film pressing mechanism for stably pressing a film material broken end on a new winding core is arranged on the lifting frame, a film smoothing mechanism for smoothing the film material broken end on an old winding core is arranged on the rack, the film material broken end is pressed on the new winding core by the film pressing roller driven by the rotating assembly, so that the film material broken end is pressed on the new winding core, then the film material broken end rotates synchronously with the new winding core, so that the film material broken end is pressed into the film layers wound on the new winding core, and the winding changing quality and the winding changing success rate are efficiently improved; meanwhile, the flattening roller driven by the swinging assembly pushes and smooths the film material broken end to gradually adhere to the old winding core, so that the appearance quality of the finished film roll and the subsequent unwinding use are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of film winding technology, specifically an automatic winding device for food packaging film processing. Background Technology

[0002] Currently, automatic winding devices are widely used in food packaging film processing production lines to achieve continuous winding of film materials. In order to achieve continuous production without stopping the machine, most existing automatic winding devices adopt a dual-station structure. When the film roll on one winding shaft reaches the full roll specification, the two stations are interchanged, and the empty core on the other winding shaft continues to wind, thereby realizing automatic roll changing.

[0003] The typical roll changing process of an automatic winding structure is roughly as follows: When the winding device detects that the film roll at the current station has reached the preset specifications, the control system issues a roll changing command; the empty core at the preparatory station enters the winding station, and at the same time, the winding device dynamically adjusts the winding speed according to the change in roll diameter; then the cutting assembly moves to cut the film material located between the old film roll and the new core; the cut film material is pressed onto the surface of the new core by the adhesive on the outside of the new core, and the new core continues to rotate to start the next round of winding; the old film roll is removed from the winding station by the unwinding mechanism.

[0004] However, existing automatic winding devices have the following shortcomings in actual use: First, in the end-pressing stage, existing devices usually rely on the adhesive coating on the surface of the new core to adhere the film to the core. However, there is usually a certain distance between the cut end of the film and the new core. This makes it impossible to push and press the cut end of the film by relying solely on adhesive adhesion. As a result, the cut end of the film is prone to lifting, shifting or even falling off during the winding process due to centrifugal force. It is difficult to press the cut end of the film flat into the film layer, which affects the winding quality.

[0005] Secondly, in the process of handling the broken ends on the side of the old film roll, the existing equipment generally lacks an effective broken end pressing structure. After the broken ends of the film material on the old film roll lose tension constraint, they are prone to folding and wrinkling, which affects the appearance quality of the finished film roll and its subsequent unwinding and use. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: an automatic winding device for food packaging film processing, including a frame, an expansion shaft detachably connected to the frame, and a transfer mechanism for transporting the expansion shaft. A lifting frame is vertically slidably connected to the frame, and a film pressing mechanism is provided on the lifting frame to stably press the broken ends of the film material onto the new roll core. A film smoothing mechanism is provided on the frame to smooth the broken ends of the film material onto the old roll core.

[0007] A cutting blade for quickly cutting film material is vertically slidably connected to the lifting frame.

[0008] The film pressing mechanism includes a film pressing roller mounted on a lifting frame via a rotating assembly, and a limiting assembly for locking the expansion shaft is provided on both the frame and the lifting frame.

[0009] The film smoothing mechanism includes a flattening roller mounted on a frame via a swing assembly.

[0010] After the cutter cuts the film material, the rotating component quickly drives the pressing roller to roll and adhere to the new core, pressing the cut end of the film material onto the new core. Then, the cut end of the film material rotates synchronously with the new core until the cut end of the film material is pressed into the film layers wound on the new core. At the same time, the swing component drives the flattening roller to push and smooth the cut end of the film material and gradually adhere it to the old core.

[0011] Preferably, the rotating assembly includes two rotating arms rotatably mounted on the lifting frame, with sliding blocks slidably connected to the rotating arms along their length, and the pressure roller rotatably connected between the two sliding blocks.

[0012] Preferably, a synchronous motor is fixedly installed on the lifting frame, and the output shaft of the synchronous motor is fixedly connected to the corresponding rotating arm.

[0013] Preferably, an electric cylinder is fixedly installed on the rotating arm, and the telescopic section of the electric cylinder is fixedly connected to the corresponding sliding block.

[0014] Preferably, the lifting frame is rotatably equipped with guide rollers, and two electric sliders are fixedly installed on the lifting frame, with the electric sliders vertically slidably connected to the frame.

[0015] Preferably, the cutting blade has multiple continuous inclined structures, and an electric cylinder three is fixedly installed on the lower side of the lifting frame, with the telescopic section of the electric cylinder three fixedly connected to the cutting blade.

[0016] Preferably, the limiting component includes two fixed discs arranged symmetrically front to back and fixedly mounted on the frame, and three arc-shaped abutment plates that slide radially along the circumference of the fixed discs.

[0017] Preferably, a synchronization disc is rotatably connected to the fixed disc, and the synchronization disc is hinged to the corresponding arc-shaped abutment plate through a connecting plate.

[0018] Preferably, a helical spring is provided between the lowermost arc-shaped abutment plate and the corresponding fixed disc, and a support arm for pushing the lowermost arc-shaped abutment plate is fixedly installed on the lifting frame.

[0019] Preferably, the swing assembly includes two swing arms rotatably connected to the frame, with a movable block slidably connected to the swing arm along its length, and a flattening roller rotatably connected between the two movable blocks.

[0020] Preferably, an electric cylinder two for driving the moving block is fixedly installed on the swing arm, and a synchronous motor two for driving the swing arm is fixedly installed on the frame.

[0021] Preferably, two spiral protrusions symmetrically arranged front and back are fixedly provided on the outer surface of the flattening roller. The spiral protrusions adhere to the film material and roll, thereby pulling and smoothing the film material outward.

[0022] The beneficial effects of this invention are as follows: First, this invention uses a rotating component to quickly drive the pressure roller to roll and adhere to the new roll core, thereby pressing the broken ends of the film material onto the new roll core. Then, the broken ends of the film material rotate synchronously with the new roll core, so that the broken ends of the film material are pressed into the film layers wound on the new roll core, which efficiently improves the quality and success rate of roll changing. At the same time, the swing component drives the flattening roller to push and smooth the broken ends of the film material and gradually adhere them to the old roll core, effectively avoiding folds and wrinkles on the broken ends of the old film roll, thereby ensuring the appearance quality of the finished film roll and its subsequent unwinding and use.

[0023] Second, the present invention uses two symmetrically arranged spiral protrusions fixed on the outer side of the flattening roller. While the flattening roller pushes the film material, the spiral protrusions roll against the film material, thereby generating an outward pulling force on the film material to smooth it out. This effectively prevents the film material from folding or wrinkling on the surface of the old roll core, ensuring the flatness of the winding at the broken end of the old film roll.

[0024] Third, the present invention uses a cutting blade with multiple continuous inclined blades, which allows the cutting blade to cut the film material under the drive of the electric cylinder three. This transforms the traditional long-distance overall sliding cut along the width of the film material into several small-distance cuts performed simultaneously, greatly shortening the cutting stroke and cutting time. It effectively reduces the risk of uneven cuts caused by film material vibration under high-speed production conditions, and significantly improves cutting efficiency and winding quality. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a partial structural diagram of the present invention during the replacement of old and new cores;

[0028] Figure 3 This is a partial structural schematic diagram of the frame, expansion shaft, and transfer mechanism in this invention;

[0029] Figure 4 This is a partial structural diagram of the lifting frame, expansion shaft, cutting blade and synchronous motor in this invention;

[0030] Figure 5This is a partial cross-sectional view of the lifting frame, support arm, rotating arm and sliding block in this invention;

[0031] Figure 6 This is a partial structural diagram of the expansion shaft, arc-shaped abutment plate, limiting component and lifting frame in this invention;

[0032] Figure 7 This is a partial cross-sectional view of the connecting plate, the synchronizing disc, the fixed disc, and the arc-shaped abutment plate in this invention;

[0033] Figure 8 This is a partial cross-sectional view of the swing arm, moving block, flattening roller and synchronous motor II in this invention.

[0034] In the diagram: 1. Frame; 2. Expansion shaft; 3. Transfer mechanism; 4. Lifting frame; 5. Film pressing mechanism; 6. Film smoothing mechanism; 41. Cutting knife; 42. Guide roller; 43. Electric slider; 44. Electric cylinder three; 51. Rotating assembly; 52. Film pressing roller; 53. Limiting assembly; 61. Swinging assembly; 62. Flattening roller; 511. Rotating arm; 512. Sliding block; 513. Synchronous motor one; 514. Electric cylinder one; 531. Fixed disc; 532. Arc-shaped abutment plate; 533. Synchronous disc; 534. Connecting plate; 535. Support arm; 611. Swinging arm; 612. Moving block; 613. Electric cylinder two; 614. Synchronous motor two. Detailed Implementation

[0035] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0036] See Figure 1 , Figure 2 , Figure 3 and Figure 4 An automatic winding device for processing food packaging film includes a frame 1, an expansion shaft 2 detachably connected to the frame 1, and a transfer mechanism 3 for transporting the expansion shaft 2. A lifting frame 4 is vertically slidably connected to the frame 1. A film pressing mechanism 5 is provided on the lifting frame 4 to stably press the cut ends of the film material onto a new roll core. A film smoothing mechanism 6 is provided on the frame 1 to smooth the cut ends of the film material onto an old roll core. A cutting blade 41 for quickly cutting the film material is vertically slidably connected to the lifting frame 4.

[0037] In this embodiment, the transfer mechanism 3 has a feeding station, a winding station, and a standby station from right to left. The frame 1, the expansion shaft 2, and the transfer mechanism 3 all adopt the existing structure in traditional winding equipment, which will not be described in detail here. In this embodiment, there are two expansion shafts 2, which are respectively arranged on the winding station and the standby station of the transfer mechanism 3. Both expansion shafts 2 have cores coaxially locked on them by their external support force. When the old core on the expansion shaft 2 at the winding station is used to wind up the film, the new core on the expansion shaft 2 at the standby station is ready. The outside of the new core is coated with adhesive.

[0038] When the film roll on the winding core is about to reach the full roll specification, the expansion shaft 2, which is in a standby state, is moved by the transfer mechanism 3 so that the new core comes into contact with the film material. Then the lifting frame 4 moves upward, and the lifting frame 4 drives the cutter 41 to move to the lower side of the film material, ready to quickly cut the film material. At the same time, the lifting frame 4 drives the film pressing mechanism 5 to come into contact with the film material at the position of the new core, and simultaneously drives the film smoothing mechanism 6 to come into contact with the film material at the position of the old core.

[0039] After the cutting blade 41, the film smoothing mechanism 6 and the film pressing mechanism 5 are in place, when the film roll on the old core reaches the full roll specification, the cutting blade 41 moves up quickly, so that the cutting blade 41 cuts the film material quickly. Then the film pressing mechanism 5 and the film smoothing mechanism 6 act simultaneously.

[0040] The pressing mechanism 5 presses the broken end of the film material onto the new core, and then makes the broken end of the film material rotate synchronously with the new core, so that the broken end of the film material is pressed into the film layers wound on the new core. The broken end of the film material can be reliably fixed without the use of adhesive, which reduces the production cost caused by continuous consumption of adhesive and efficiently improves the quality and success rate of roll changing.

[0041] The film smoothing mechanism 6 pushes and smooths the broken ends of the film material at the position of the old core and gradually attaches them to the old core, effectively avoiding folds and wrinkles on the broken ends of the old film roll, thereby ensuring the appearance quality of the finished film roll and subsequent unwinding. Then, the film pressing mechanism 5 and the film smoothing mechanism 6 are reset, and the position of the lifting frame 4 is lowered and reset. Then, the fully rolled expansion shaft 2 is moved to the unloading station by the transfer mechanism 3, the expansion shaft 2 that is being wound up is moved to the winding station, and the new expansion shaft 2 and the core on it are moved to the waiting station.

[0042] See Figure 1 , Figure 2 , Figure 5 and Figure 6 The film pressing mechanism 5 includes a film pressing roller 52 mounted on the lifting frame 4 via a rotating assembly 51, and a limiting assembly 53 for locking the expansion shaft 2 is provided on both the frame 1 and the lifting frame 4.

[0043] After the cutter 41 cuts the film material, the rotating component 51 quickly drives the pressing roller 52 to roll against the new core, causing the pressing roller 52 to rotate around the circumference of the new core. Due to the drive of the rotating component 51, the circumferential rotation speed of the pressing roller 52 is greater than the rotation of the new core, which causes the pressing roller 52 to push the cut part of the film material to gradually adhere to and press against the new core until the pressing roller 52 presses against the cut end of the film material.

[0044] The above steps can actively and gradually press a section of film material between the cut end of the film material and the new core onto the new core, avoiding problems such as the film material cutting end lifting, shifting, or even falling off during the initial winding of the new core.

[0045] When the pressing roller 52 presses against the broken end of the film material, the rotating component 51 drives the circumferential rotation of the pressing roller 52 to be synchronized with the rotation of the new core, so that the pressing roller 52 no longer rotates relative to the new core. This allows the pressing roller 52 to always press the broken end of the film material onto the new core. As the new core rotates, until the broken end of the film material rotates to the point where it is about to be pressed into the layers of film material being wound, the rotating component 51 drives the pressing roller 52 to stop rotating and move away from the new core radially. Then, the new core drives the broken end of the film material to be pressed flat into the layers of film material being wound.

[0046] The above steps can provide continuous tracking and limiting of the broken ends of the film material pressed onto the new core, effectively ensuring that the broken ends of the film material are pressed flat into the wound film material layer, further avoiding the problems of the broken ends of the film material lifting, shifting or even falling off, and ensuring the quality of winding.

[0047] See Figure 1 , Figure 2 and Figure 8 The film smoothing mechanism 6 includes a flattening roller 62 mounted on the frame 1 via a swing assembly 61. After the cutter 41 cuts the film material, the swing assembly 61 drives the flattening roller 62 to push the film material, so that a section of film material between the cut end and the old roll core gradually adheres to the old roll core. Furthermore, the flattening roller 62 can pull the edge of the film material with a certain force while rolling and pushing the film material, thereby actively flattening the cut end of the film material and smoothing the film material. This effectively prevents the film material from folding or wrinkling on the surface of the old roll core, ensuring the flatness of the winding at the cut end of the old film roll.

[0048] To facilitate the raising and lowering of the lifting frame 4, the present invention designs the following structure: (See attached diagram) Figure 2 , Figure 4 , Figure 5 and Figure 6 The lifting frame 4 is equipped with a guide roller 42 that rotates on it. Two electric sliders 43 are fixedly installed on the lifting frame 4 and are vertically slidably connected to the frame 1.

[0049] When the old core is being wound up, the electric slider 43 drives the lifting frame 4 to the initial position at the bottom. At this time, the guide roller 42 and the pressure roller 52 are both located at the bottom of the film and are not in contact with the film. When the film on the old core is about to be fully wound, the transfer mechanism 3 moves the expansion shaft 2 with the new core to the upper side of the film, so that the new core presses the film downward, and at the same time the electric slider 43 drives the lifting frame 4 to move upward.

[0050] The lifting frame 4 moves the guide roller 42, the cutter 41, and the pressing roller 52 upwards simultaneously to contact the film material. At this time, the pressing roller 52 is located on the right side of the new core, and the pressing roller 52 squeezes the film material against the outer surface of the new core. The film material between the pressing roller 52 and the guide roller 42 is in a horizontal state, and the cutter 41 is located on the lower side of this horizontal film material, thus preparing to cut the film material.

[0051] In order for the cutter 41 to quickly cut the film material, the present invention is designed with the following structure: (See reference) Figure 4 and Figure 5 The cutting blade 41 has multiple continuous inclined structures. An electric cylinder 3 44 is fixedly installed on the lower side of the lifting frame 4. The telescopic section of the electric cylinder 3 44 is fixedly connected to the cutting blade 41.

[0052] When the film material on the old core is fully rolled, the telescopic section of the electric cylinder 44 extends rapidly, causing the electric cylinder 44 to drive the cutter 41 to move up quickly to contact and cut the film material. This transforms the traditional long-distance overall sliding cut along the width of the film material into several small-distance cuts performed simultaneously, significantly shortening the cutting stroke and cutting time. It effectively reduces the risk of uneven cuts caused by film material vibration under high-speed production conditions, and significantly improves cutting efficiency and winding quality.

[0053] To facilitate the rapid pressing of the film material onto the new roll core by the pressing roller 52, and subsequently to continuously press and limit the broken ends of the film material, the present invention is designed with the following structure: (See reference) Figure 2 , Figure 4 and Figure 5 The rotating assembly 51 includes two rotating arms 511 rotatably mounted on the lifting frame 4. Sliding blocks 512 are slidably connected to the rotating arms 511 along their length direction. The pressure roller 52 is rotatably connected between the two sliding blocks 512. A synchronous motor 513 is fixedly mounted on the lifting frame 4. The output shaft of the synchronous motor 513 is fixedly connected to the corresponding rotating arm 511.

[0054] After the film material is cut, the synchronous motor 513 quickly rotates the rotating arm 511, causing the rotating arm 511 to drive the pressure roller 52 to move rapidly around the circumference of the new core through the sliding block 512. This allows the pressure roller 52 to push the film material to quickly adhere and press it onto the new core. When the pressure roller 52 presses to the cut end of the film material, the synchronous motor 513 decelerates, causing the pressure roller 52 to rotate synchronously with the new core, thereby continuously pressing and limiting the cut end of the film material. When the cut end of the film material is about to be pressed into the winding layer of the film material, the synchronous motor 513 stops rotating and then reverses to reset the position of the pressure roller 52.

[0055] To facilitate the pressing roller 52 in pushing the film material onto the new roll core, and to drive the pressing roller 52 away from the film material just before the cut end of the film material is pressed into the winding layer, the present invention has designed the following structure: See [reference] Figure 5 An electric cylinder 514 is fixedly installed on the rotating arm 511, and the telescopic section of the electric cylinder 514 is fixedly connected to the corresponding sliding block 512.

[0056] When pushing the film material, the electric cylinder 514 pulls the sliding block 512 towards the axis position of the new core with a specified force, so that the sliding block 512 drives the pressure roller 52 to push the film material to be pressed onto the new core; when the broken end of the film material is about to be pressed into the winding layer of the film material, the telescopic section of the electric cylinder 514 extends, so that the sliding block 512 drives the pressure roller 52 away from the new core.

[0057] To ensure that the rotating arm 511 rotates around the axis of the new core, and to ensure that the position of the expansion shaft 2 with the new core remains unchanged when the pressure roller 52 pushes the film material onto the new core, the present invention designs the following structure: (See reference) Figure 2 , Figure 6 and Figure 7 The limiting component 53 includes two fixed discs 531 arranged symmetrically front and back and fixedly installed on the frame 1. Three arc-shaped abutment plates 532 are provided on the fixed discs 531 along their circumference and slide along their radial direction.

[0058] In this embodiment, three arc-shaped abutment plates 532 are arranged at equal intervals. One arc-shaped abutment plate 532 is arranged below the other two arc-shaped abutment plates 532, and the two upper arc-shaped abutment plates 532 are arranged horizontally to each other. In the initial state, the three arc-shaped abutment plates 532 are far apart from each other, so that the transfer mechanism 3 can move the expansion shaft 2 with the new core to the space between the three arc-shaped abutment plates 532, so that the expansion shaft 2 is coaxially arranged with the fixed disk 531.

[0059] When the lifting frame 4 moves to the designated position, the lifting frame 4 can automatically push the three arc-shaped abutment plates 532 to move closer to each other synchronously, so that the three arc-shaped abutment plates 532 clamp and fix the position of the expansion shaft 2. In this embodiment, a number of limiting rollers are rotatably arranged inside the arc-shaped abutment plates 532. The arc-shaped abutment plates 532 roll contact with the expansion shaft 2 through the limiting rollers on them, which can limit the expansion shaft 2 to the coaxial position of the fixed disk 531 without hindering the rotation of the expansion shaft 2.

[0060] To enable the three arc-shaped abutment plates 532 to move closer or further apart synchronously, the present invention designs the following structure: (See reference) Figure 6 and Figure 7 A synchronous disk 533 is rotatably connected to the fixed disk 531. The synchronous disk 533 is hinged to the corresponding arc-shaped abutment plate 532 through the connecting plate 534.

[0061] When an arc-shaped abutment plate 532 moves radially along the fixed disk 531, the arc-shaped abutment plate 532 drives the synchronous disk 533 to rotate through the corresponding connecting plate 534, so that the synchronous disk 533 drives the corresponding arc-shaped abutment plate 532 to move radially through the other connecting plates 534, thereby making the three arc-shaped abutment plates 532 move radially synchronously.

[0062] To ensure that the three arc-shaped abutment plates 532 are initially far apart from each other, and that when the lifting frame 4 moves upward until the pivot point of the rotating arm 511 is located on the axis of the fixed disk 531, the three arc-shaped abutment plates 532 automatically clamp and limit the expansion shaft 2, the present invention designs the following structure: (Continue reading) Figure 6 and Figure 7 A helical spring is provided between the lowest arc-shaped abutment plate 532 and the corresponding fixed disc 531, and a support arm 535 for pushing the lowest arc-shaped abutment plate 532 is fixedly installed on the lifting frame 4.

[0063] In the initial state, the lowest arc-shaped abutment plate 532 moves downward relative to the fixed disk 531 under the elastic force of the corresponding helical spring, so that the three arc-shaped abutment plates 532 move radially away from the center of the fixed disk 531 at the same time, and are in a loosened state that moves away from each other, so that the expansion shaft 2 can smoothly enter or leave the coaxial position of the fixed disk 531.

[0064] Once the lifting frame 4 has risen to its position, the lifting frame 4 drives the support arm 535 to automatically push the lowest arc-shaped abutment plate 532, and with the help of the linkage of the synchronous disc 533, the three arc-shaped abutment plates 532 simultaneously clamp the expansion shaft 2, thus realizing the linkage between the lifting of the lifting frame 4 and the locking of the expansion shaft 2.

[0065] To facilitate the flattening roller 62 in gradually bonding and pressing a section of film between the cut end and the old roll core onto the old roll core, the present invention is designed with the following structure: (See reference)Figure 1 , Figure 2 and Figure 8 The swing assembly 61 includes two swing arms 611 rotatably connected to the frame 1. A moving block 612 is slidably connected to the swing arm 611 along its length direction. The flattening roller 62 is rotatably connected between the two moving blocks 612.

[0066] In the initial state, the expansion shaft 2 located at the winding station is coaxially arranged with the output shaft of the synchronous motor 614, so that the pivot point of the swing arm 611 is located on the axis of the old core. When the film material on the old core is about to be fully rolled, the synchronous motor 614 rotates the swing arm 611, so that the swing arm 611 drives the flattening roller 62 to swing from bottom to left through the moving block 612, so that the flattening roller 62 squeezes the lower side of the film material, so that the film material adheres to the old core.

[0067] After the film material is cut, the second synchronous motor 614 quickly rotates the swing arm 611, causing the flattening roller 62 to quickly push the section of film material between the cut end and the old core, thereby causing the flattening roller 62 to push the section of film material to gradually adhere to the surface of the old core; when the cut end of the film material is completely adhered to the surface of the old core, the second synchronous motor 614 stops rotating, and then the second synchronous motor 614 is reversed to reset the position of the flattening roller 62.

[0068] To ensure that the flattening roller 62 maintains appropriate pressure against the film material during the film-pushing process, and to drive the flattening roller 62 away from the film material after the film material has fully adhered to the old roll core, the present invention is designed with the following structure: (See reference) Figure 8 An electric cylinder 613 that drives the moving block 612 is fixedly installed on the swing arm 611, and a synchronous motor 614 that drives the swing arm 611 is fixedly installed on the frame 1.

[0069] When pushing the film material, the second electric cylinder 613 pulls the moving block 612 towards the axis position of the old core with a specified force, so that the moving block 612 drives the flattening roller 62 to press the film material against the old core with appropriate pressure, ensuring that the film material is always in close contact with the surface of the old core without wrinkles during the pushing process; after the broken end of the film material is completely pressed against the old core, the telescopic section of the second electric cylinder 613 is retracted, so that the moving block 612 drives the flattening roller 62 away from the old core, so as to facilitate the subsequent unwinding operation.

[0070] To simultaneously eliminate wrinkles and folds that may occur on the surface of the film during the process of the flattening roller 62 pushing the film material to bond with the old roll core, the present invention designs the following structure: (Continue reading) Figure 8 Two spiral protrusions are fixedly provided on the outer side of the flattening roller 62, which are arranged symmetrically in front and behind. The spiral protrusions adhere to the film material and roll, thereby pulling the film material outward and smoothing it.

[0071] When the flattening roller 62 pushes the film material along the circumference of the old roll core, the spiral protrusions symmetrically arranged on the outer side of the flattening roller 62 roll synchronously against the surface of the film material. During the rolling process, the spiral protrusions on the front side generate a forward pulling force on the front part of the film material, and the spiral protrusions on the rear side generate a backward pulling force on the rear part of the film material. The two oblique pulling forces in opposite directions work together to gradually flatten the film material from the middle to both sides along the width direction and pull it outward, effectively eliminating the folds and wrinkles caused by uneven tension during the pushing process.

[0072] The size of the spiral protrusions and the force of the flattening roller 62 in extruding the film material were determined through repeated experiments by those skilled in the art, so that the spiral protrusions can effectively flatten the film material and prevent excessive stretching of the film material.

[0073] In summary, this invention actively presses and continuously tracks the broken ends of the film material on the new core using the pressing roller 52, ensuring that the broken ends are flattened and pressed between the winding film layers. At the same time, the flattening roller 62 pushes and smooths the broken ends of the film material on the old core to avoid folding and wrinkling. Combined with the rapid cutting of the cutter 41 and the linkage locking of the expansion shaft 2, although it increases the initial investment compared to traditional equipment, it can quickly balance the initial cost and achieve significant economic benefits by reducing the scrap rate and improving the quality of finished products. It has extremely high practical value and promotion significance.

[0074] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0075] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0076] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0077] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An automatic winding device for processing food packaging film, comprising a frame, an expansion shaft detachably connected to the frame, and a transfer mechanism for transporting the expansion shaft, characterized in that, A lifting frame is vertically slidably connected to the frame. The lifting frame is equipped with a pressing mechanism that stably presses the broken ends of the film onto the new roll core, and a smoothing mechanism that flattens the broken ends of the film onto the old roll core. The lifting frame is vertically slidably connected to a cutting blade for quickly cutting film material; The film pressing mechanism includes a film pressing roller mounted on a lifting frame via a rotating assembly, and a limiting assembly for locking the expansion shaft is provided on both the frame and the lifting frame. The film smoothing mechanism includes a flattening roller mounted on a frame via a swing assembly; After the cutter cuts the film material, the rotating component quickly drives the pressing roller to roll and adhere to the new core, pressing the cut end of the film material onto the new core. Then, the cut end of the film material rotates synchronously with the new core until the cut end of the film material is pressed into the film layers wound on the new core. At the same time, the swing component drives the flattening roller to push and smooth the cut end of the film material and gradually adhere it to the old core.

2. The automatic winding device for food packaging film processing according to claim 1, characterized in that, The rotating assembly includes two rotating arms rotatably mounted on the lifting frame, with sliding blocks slidably connected to the rotating arms along their length, and a pressure roller rotatably connected between the two sliding blocks.

3. The automatic winding device for food packaging film processing according to claim 2, characterized in that, A synchronous motor is fixedly installed on the lifting frame, and the output shaft of the synchronous motor is fixedly connected to the corresponding rotating arm.

4. The automatic winding device for food packaging film processing according to claim 2, characterized in that, An electric cylinder is fixedly installed on the rotating arm, and the telescopic section of the electric cylinder is fixedly connected to the corresponding sliding block.

5. The automatic winding device for food packaging film processing according to claim 1, characterized in that, The limiting component includes two fixed discs arranged symmetrically front to back and fixedly mounted on the frame. Three arc-shaped abutment plates that slide radially are provided on the fixed discs along their circumference.

6. The automatic winding device for food packaging film processing according to claim 5, characterized in that, A synchronizing disc is rotatably connected to the fixed disc, and the synchronizing disc is hinged to the corresponding arc-shaped abutment plate through a connecting plate.

7. The automatic winding device for food packaging film processing according to claim 5, characterized in that, A helical spring is provided between the lowermost arc-shaped abutment plate and the corresponding fixed disc, and a support arm for pushing the lowermost arc-shaped abutment plate is fixedly installed on the lifting frame.

8. The automatic winding device for food packaging film processing according to claim 1, characterized in that, The swing assembly includes two swing arms rotatably connected to the frame, with movable blocks slidably connected to the swing arms along their length, and a flattening roller rotatably connected between the two movable blocks.

9. An automatic winding device for food packaging film processing according to claim 8, characterized in that, The swing arm is fixedly mounted with an electric cylinder two that drives the moving block, and the frame is fixedly mounted with a synchronous motor two that drives the swing arm.

10. An automatic winding device for food packaging film processing according to claim 1, characterized in that, Two symmetrically arranged spiral protrusions are fixedly provided on the outer side of the flattening roller. The spiral protrusions adhere to the film material and roll, thereby pulling and smoothing the film material outward.

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