Adjustable winding mechanism of film compound machine for food packaging bag production

Abstract

The invention relates to the technical field of thin film processing, in particular to an adjustable winding mechanism of a thin film compounding machine for food packaging bag production, which comprises a rack, a re-pressing roller, a winding roller and a distance adjusting mechanism, a flow guide strip is arranged on the re-pressing roller, and a second adjusting mechanism is arranged in the re-pressing roller. The re-pressing roller can keep constant pressure on a continuously changing material coil on the winding roller, so that wrinkles on the material coil are reduced, and the adaptability and stability of the winding roller to material coil winding are improved; the flow guide strip is of a spiral structure, air in wrinkles on a material roll can be continuously extruded to the edge of the material roll, generation of the wrinkles on the material roll is reduced, the length of the flow guide strip is adjusted through the second adjusting mechanism, the flow guide strip can be matched with the material rolls with different lengths, and the material roll quality is improved. And the density of the spirals on the material guide strips is adjusted by changing the length of the flow guide strips, so that the adaptability of the equipment is further improved, and the stability of the winding roller for winding the material roll is improved.

Description

Technical Field

[0001] This invention relates to the field of film processing technology, specifically to an adjustable winding mechanism for a film laminating machine used in the production of food packaging bags. Background Technology

[0002] Films are widely used in packaging and as coating layers in the food, pharmaceutical, and chemical industries, with food packaging accounting for the largest proportion, such as beverage packaging, frozen food packaging, retortable food packaging, and fast food packaging. These applications have brought great convenience to people's lives. In the current film production process, the film needs to be coated with adhesive, dried, and then rolled up. Existing film winding devices are complex in structure and cumbersome to operate. After the winding roller finishes winding the film, it needs to be manually replaced to continue winding, resulting in low efficiency. Furthermore, wrinkles can occur during the winding process due to differences in equipment parameters and materials, affecting the final winding effect. To ensure smooth winding, a secondary pressure roller is typically installed on the roll. This secondary pressure roller can only elastically compress the winding roller to reduce wrinkles during winding. However, as the roll grows larger during winding, the elastic secondary pressure roller cannot maintain consistent pressure on the winding roller, further affecting the winding effect.

[0003] Chinese patent CN105084064B discloses a film winding mechanism, including a fixed bracket, a translation bracket, a translation support plate, a winding bracket, and a winding roller. The middle parts of both sides of the translation bracket are rotatably connected to the fixed bracket. A rotary motor drives the translation bracket. Translation guide plates are horizontally arranged on both sides of the translation support plate. Winding brackets are arranged on both sides of the translation bracket. A winding motor drives the winding roller. The winding bracket can translate along the translation guide plates. Translation drive plates are horizontally arranged at both ends of one side of the winding bracket. Two translation motors drive two translation screws respectively. The two translation screws are horizontally threaded to the translation drive plates on one side of the two winding brackets. This patent can continuously wind up the film, improving the winding efficiency and quality. However, it still cannot remove wrinkles on the roll during the winding process, leaving air between the rolls after winding, which affects the winding effect. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an adjustable winding mechanism for a film laminating machine used in food packaging bag production. The invention utilizes a spacing adjustment mechanism to drive the sliding of the pressure roller, enabling it to maintain constant pressure on the constantly changing material roll on the winding roller. This reduces wrinkles on the material roll and improves the adaptability and stability of the winding roller in taking up the material roll. The spiral structure of the guide strip continuously compresses air trapped within wrinkles on the material roll towards its edge, further reducing wrinkles. A second adjustment mechanism adjusts the length of the guide strip, allowing it to match material rolls of different lengths. Furthermore, changing the length of the guide strip adjusts the density of the spiral on the guide strip, further enhancing the equipment's adaptability and improving the stability of the winding roller in taking up the material roll.

[0005] To address the problems of existing technologies, an adjustable winding mechanism for a film laminating machine used in food packaging bag production includes a frame and a winding roller and a re-pressing roller mounted on the frame. The re-pressing roller is rotatably mounted above the winding roller, and their rotation directions are opposite. The frame is equipped with a spacing adjustment mechanism that allows the re-pressing roller to slide along the height of the frame; this mechanism adjusts the gap between the re-pressing roller and the winding roller. The re-pressing roller is equipped with a guide strip for smoothing wrinkles on the take-up roll; the guide strip has a spiral structure and is made of elastic material, and is sleeved on the re-pressing roller along its axial direction.

[0006] Preferably, the pressure roller is provided with two first grooves extending along its axial direction. The two first grooves are mirror-symmetrical and located on both sides of the pressure roller. The first grooves pass through the outer wall of the pressure roller. The guide strip is provided with a first sliding rod and a second sliding rod that match the two first grooves. There are multiple first sliding rods and multiple second sliding rods. The multiple first sliding rods and multiple second sliding rods are arranged at equal intervals on the guide strip.

[0007] Preferably, the secondary pressure roller is provided with sliding frames that are the same number as the first sliding rods and correspond one-to-one. Multiple sliding frames are respectively sleeved under multiple first sliding rods, and all sliding frames can slide along the axis of the secondary pressure roller. The guide strip is also provided with scissor frames, and multiple sliding frames are equally spaced on the scissor frames.

[0008] Preferably, the re-pressure roller is provided with two guide rails extending along its axial direction, each sliding frame is provided with two support legs at its bottom, and each support leg is provided with two slots matching the guide rails. The bottom of the second sliding rod is provided with an arc-shaped limiting block coaxially arranged with the axis of the re-pressure roller.

[0009] Preferably, the second adjustment mechanism includes a first fixed end and a first movable end. The first fixed end is fixedly connected to one end of the re-pressure roller, and the first movable end is located inside the re-pressure roller and can slide along the axial direction of the re-pressure roller. The first fixed end and the second movable end are respectively connected to the two ends of the guide strip.

[0010] Preferably, the second adjustment mechanism includes a second fixed end and two second movable ends. The second fixed end is fixedly connected to the center of the pressure roller. The spiral of the guide strip has a structure with opposite directions from the middle to both ends. The middle part of the guide strip is connected to the second fixed end. The two second movable ends are located inside the pressure roller and can slide relative to each other. The two ends of the guide strip are respectively connected to the two second movable ends.

[0011] Preferably, the pressure roller is a hollow structure, and a second adjustment mechanism for adjusting the length of the guide strip is provided inside the pressure roller. The second adjustment mechanism also includes a first lead screw, a first rotary drive motor, two support plates, and two guide posts. The pressure roller is rotatably mounted on the two support plates, and the two support plates are located at both ends of the pressure roller. The first lead screw is horizontally mounted between the two support plates, and the axis of the first lead screw is coaxial with the axis of the pressure roller. The two ends of the first lead screw have opposing threads. The two guide posts are located on both sides of the first lead screw, and the axes of the two guide posts are parallel to the axis of the first lead screw. A second movable end is sleeved on the first lead screw and the two guide posts. The second movable end is threadedly engaged with the first lead screw and slidably engaged with the two guide posts. A sliding frame is rotatably mounted on the second movable end. The first rotary drive motor is fixedly connected to one of the support plates on the side away from the first lead screw, and the first lead screw is driven by the first rotary drive motor.

[0012] Preferably, the frame includes two support frames, each of which is provided with a second slide groove extending along the height direction of the support frame. Each of the two second slide grooves is provided with a first slider that slides within it. The pressure roller is rotatably positioned between the two first sliders. A spacing adjustment mechanism is mounted on one of the support frames. The spacing adjustment mechanism includes a second lead screw, a second rotary drive motor, and two mounting plates. The two mounting plates are respectively fixedly connected to the top and bottom of the second slide groove. The second lead screw is vertically rotatably positioned between the two mounting plates. The second rotary drive motor is fixedly connected to one of the mounting plates. The second lead screw is drively connected to the second rotary drive motor. The first slider is sleeved on the second lead screw and threadedly engaged with it.

[0013] Preferably, the repress roller and the take-up roller are connected by a drive, and a drive shaft parallel to the axis of the take-up roller is provided on the side of the take-up roller. Both the take-up roller and the drive shaft are provided with gears, and the two gears are meshed together. A synchronous belt is sleeved between the repress roller and the drive shaft.

[0014] Preferably, a tensioner for tensioning the timing belt is provided on the side of the pressure roller.

[0015] The advantages of this invention compared to the prior art are: 1. The present invention drives the re-pressure roller to slide along the height direction of the frame through the gap adjustment mechanism, so that the re-pressure roller slides to one side of the take-up roller until the gap between the re-pressure roller and the take-up roller meets the process requirements. The re-pressure roller can maintain a constant pressure on the constantly changing material roll on the take-up roller, thereby reducing wrinkles on the material roll and improving the stability of the take-up roller for taking up the material roll. 2. This invention utilizes guide strips on the pressure roller. During the rotation of the pressure roller, the guide strips also rotate. Because the guide strips have a spiral structure, their rotation continuously compresses air from the folds in the roll towards the edge, thereby reducing folds. The length of the guide strips is adjusted by a second adjustment mechanism, allowing them to be matched to rolls of different lengths. Furthermore, the density of the spirals on the guide strips is adjusted by changing their length, further improving the adaptability of the equipment and enhancing the stability of the take-up roller in taking up the roll. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the adjustable winding mechanism of a film laminating machine for food packaging bag production. Figure 1 ; Figure 2 This is a three-dimensional structural diagram of the adjustable winding mechanism of a film laminating machine for food packaging bag production. Figure 2 ; Figure 3 This is a three-dimensional structural schematic diagram of the adjustable winding mechanism of the film laminating machine for food packaging bag production, according to the first embodiment. Figure 4 This is a top view of the second embodiment of the adjustable winding mechanism of a film laminating machine for food packaging bag production; Figure 5 This is a cross-sectional structural schematic diagram of the second embodiment of the adjustable winding mechanism of the film laminating machine for food packaging bag production; Figure 6 This is a three-dimensional structural diagram of the guide strip in the second embodiment of the adjustable winding mechanism of the film laminating machine for food packaging bag production; Figure 7 This is a three-dimensional structural diagram of the sliding frame, the second movable end, and the scissor frame in the second embodiment of the adjustable winding mechanism of the film laminating machine for food packaging bag production; Figure 8 This is a three-dimensional structural diagram of the second adjustment mechanism and the guide strip in the second embodiment of the adjustable winding mechanism of the film laminating machine for food packaging bag production; Figure 9 yes Figure 8 Enlarged view of point A in the middle; Figure 10 This is a schematic diagram of the three-dimensional structure of the frame in the adjustable winding mechanism of a film laminating machine for food packaging bag production. Figure 1 ; Figure 11 This is a schematic diagram of the three-dimensional structure of the frame in the adjustable winding mechanism of a film laminating machine for food packaging bag production. Figure 2 .

[0017] The diagram is labeled as follows: 1-Frame; 11-Take-up roller; 12-Gap adjustment mechanism; 121-Second lead screw; 122-Second rotary drive motor; 123-Mounting plate; 13-Support frame; 131-Second slide groove; 132-First slider; 14-Drive shaft; 141-Gear; 142-Synchronous belt; 143-Tensioner; 2-Re-pressure roller; 21-First slide groove; 22-Second adjustment mechanism; 221-First fixed end; 222-First movable end; 223-Second fixed end; 224-Second movable end; 225-Support plate; 2251-First lead screw; 2252-Guide post; 2253-First rotary drive motor; 23-Sliding frame; 231-Support leg; 2311-Slot; 24-Scissor lift frame; 25-Guide rail; 3-Guide strip; 31-First sliding rod; 32-Second sliding rod; 321-Limit block. Detailed Implementation

[0018] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown: An adjustable winding mechanism for a film laminating machine for food packaging bag production includes a frame 1 and a winding roller 11 and a re-pressure roller 2 mounted on the frame 1. The re-pressure roller 2 is rotatably mounted above the winding roller 11, and the rotation direction of the re-pressure roller 2 is opposite to that of the winding roller 11. A gap adjustment mechanism 12 is provided on the frame 1, which can drive the re-pressure roller 2 to slide along the height direction of the frame 1. The gap adjustment mechanism 12 is used to adjust the gap between the re-pressure roller 2 and the winding roller 11. A guide strip 3 is provided on the re-pressure roller 2 to smooth out wrinkles on the take-up roll. The guide strip 3 has a spiral structure and is made of an elastic structure. The guide strip 3 is sleeved on the re-pressure roller 2 along its axial direction. The re-pressure roller 2 has a hollow structure, and a second adjustment mechanism 22 is provided inside the re-pressure roller 2 to adjust the length of the guide strip 3.

[0020] First, the film roll to be wound is pulled out and passed through the gap between the pressure roller 2 and the take-up roller 11 and mounted on the take-up roller 11. At this time, the pressure roller 2 is driven to slide along the height direction of the frame 1 by the gap adjustment mechanism 12, so that the pressure roller 2 slides to one side of the take-up roller 11 until the gap between the pressure roller 2 and the take-up roller 11 meets the process requirements, so that the pressure roller 2 always maintains a constant pressure on the take-up roller 11 to re-press, thereby reducing wrinkles on the film roll and improving the stability of the take-up roller 11 in taking the film roll. The gap between the pressure roller 2 and the take-up roller 11 can be detected by adding pressure sensors or distance sensors, thereby ensuring that the pressure between the two is constant. During the winding process, wrinkles may form on the surface of the material roll due to factors such as the rotation speed of the winding roll and the different elasticities of various material rolls. Simply pressing the material roll with the re-pressure roller 2 cannot effectively solve the wrinkling problem. By setting the guide strip 3 on the re-pressure roller 2, the guide strip 3 will also rotate during the rotation of the re-pressure roller 2. Since the guide strip 3 has a spiral structure, the rotation of the guide strip 3 can continuously squeeze the air in the wrinkles on the material roll towards the edge of the material roll, thereby reducing the formation of wrinkles on the material roll. The length of the guide strip 3 can be adjusted by the setting of the second adjustment mechanism 22, so that the guide strip 3 can be matched to material rolls of different lengths, improving the adaptability of the equipment. By changing the length of the guide strip 3, the density of the spiral on the guide strip 3 can be adjusted, thereby better removing the air located in the wrinkles on the material roll, further improving the adaptability of the equipment and improving the stability of the winding roller 11 in winding the material roll.

[0021] like Figures 4 to 9 As shown: The compound pressure roller 2 is provided with two first grooves 21 extending along its axial direction. The two first grooves 21 are mirror-symmetrical and located on both sides of the compound pressure roller 2. The first grooves 21 both penetrate through the outer wall of the compound pressure roller 2. The guide strip 3 is provided with first sliding rods 31 and second sliding rods 32 that match the two first grooves 21. There are multiple first sliding rods 31 and multiple second sliding rods 32. The multiple first sliding rods 31 and multiple second sliding rods 32 are equally spaced on the guide strip 3.

[0022] By configuring the first groove 21, the first sliding rod 31, and the second sliding rod 32, the guide strip 3 can be fitted onto the pressure roller 2. Simultaneously, the length of the guide strip 3 can be adjusted by sliding the first sliding rod 31 and the second sliding rod 32 on the first groove 21. This allows the guide strip 3 to be matched to material rolls of different lengths, improving the adaptability of the equipment. Since the guide strip 3 is made of elastic material, its length can be adjusted by sliding the first sliding rod 31 and the second sliding rod 32, thereby changing the spacing between the spirals of the guide strip 3. This allows the guide strip 3 to be adjusted for different folds, thus better expelling air from the folds in the material roll, further improving the adaptability of the equipment and enhancing the stability of the take-up roller 11 in taking up the material roll.

[0023] like Figures 4 to 9 As shown: The compound pressure roller 2 is provided with sliding frames 23, which are the same number as the first sliding rods 31 and correspond one-to-one. Multiple sliding frames 23 are respectively sleeved under multiple first sliding rods 31, and all sliding frames 23 can slide along the axis of the compound pressure roller 2. The guide strip 3 is also provided with a scissor frame 24, and multiple sliding frames 23 are equally spaced on the scissor frame 24.

[0024] The scissor lift 24 consists of multiple scissor bars, with the middle of two scissor bars hinged together. Both scissor bars are fitted below the first sliding rod 31, and the scissor bars between adjacent first sliding rods 31 are hinged together. This allows the spirals on the guide bar 3 to be adjusted at equal intervals. Through the arrangement of the sliding frame 23 and the scissor lift 24, when the length of the guide bar 3 is adjusted by the second adjusting mechanism 22, the multiple spirals on the guide bar 3 can unfold at equal intervals, facilitating better adjustment of the density of the spirals on the guide bar 3. This allows the guide bar 3 to be adjusted for different folds, thereby better expelling air from the folds in the material roll, further improving the adaptability of the equipment and enhancing the stability of the take-up roller 11 in taking up the material roll.

[0025] like Figures 4 to 9 As shown: The inner part of the pressure roller 2 is provided with two guide rails 25 extending along its axial direction. The bottom of each sliding frame 23 is provided with two support legs 231. The two support legs 231 are respectively provided with two slots 2311 matching the guide rails 25. The bottom of the second sliding rod 32 is provided with an arc-shaped limiting block 321 coaxially arranged with the axis of the pressure roller 2.

[0026] The guide rail 25, support leg 231, and slot 2311 allow the sliding frame 23 to slide more smoothly along the axis of the pressure roller 2. Simultaneously, when the pressure roller 2 rotates, the sliding frame 23 rotates more smoothly along with it, improving the stability of the equipment operation. The limit block 321 allows the guide strip 3 to be better installed on the pressure roller 2, enabling the pressure roller 2 to better drive the guide strip 3 to rotate, improving the stability and smoothness of the guide strip 3's sliding during adjustment, further enhancing the stability of the equipment operation.

[0027] like Figures 1 to 3 and Figure 7 As shown: The second adjustment mechanism 22 includes a first fixed end 221 and a first movable end 222. The first fixed end 221 is fixedly connected to one end of the pressure roller 2. The first movable end 222 is located inside the pressure roller 2 and can slide along the axial direction of the pressure roller 2. The first fixed end 221 and the second movable end 224 are respectively connected to the two ends of the guide strip 3.

[0028] First embodiment: By setting the first fixed end 221 and the first movable end 222, the first movable end 222 slides along the axial direction of the rewinding roller 2, so that the guide strip 3 connected to it can be stretched, which can match material rolls of different lengths and improve the adaptability of the equipment; at the same time, since the guide strip 3 is provided with a scissor frame 24 and a sliding frame 23, the spiral on the guide strip 3 is spread out at equal intervals, so that the air in the folds on the material roll is pushed from one end of the rewinding roller to the other end by the guide strip 3, thereby reducing the generation of folds on the material roll and improving the stability of the take-up roller 11 for taking up the material roll.

[0029] like Figures 4 to 9 As shown: The second adjustment mechanism 22 includes a second fixed end 223 and two second movable ends 224. The second fixed end 223 is fixedly connected to the center of the pressure roller 2. The spiral of the guide strip 3 has a structure in which the directions from the middle to both ends are opposite. The middle part of the guide strip 3 is connected to the second fixed end 223. The two second movable ends 224 are located inside the pressure roller 2 and can slide relative to each other. The two ends of the guide strip 3 are respectively connected to the two second movable ends 224.

[0030] Second embodiment: By having two second movable ends 224 slidably arranged on the rewinding roller 2, and since the middle part of the guide strip 3 is connected to the second fixed end 223, the two ends of the guide strip 3 are moved back and forth by the second movable ends 224 to the two ends of the rewinding roller 2, so that the guide strip 3 can be stretched to match material rolls of different lengths and improve the adaptability of the equipment; at the same time, since the guide strip 3 is provided with a scissor frame 24 and a sliding frame 23, the spiral on the guide strip 3 is unfolded at equal intervals, so that the air in the folds on the material roll is moved from the center of the rewinding roller to the two ends of the rewinding roller 2 by the guide strip 3. Compared with the first embodiment, this method can drive the air in the folds to be discharged from the material roll more quickly, improve the efficiency of fold elimination, and further improve the stability of the take-up roller 11 for taking up the material roll.

[0031] like Figures 4 to 9 As shown: The second adjustment mechanism 22 also includes a first lead screw 2251, a first rotary drive motor 2253, two support plates 225, and two guide posts 2252. The pressure roller 2 is rotatably mounted on the two support plates 225, with the two support plates 225 respectively located at both ends of the pressure roller 2. The first lead screw 2251 is horizontally rotatably mounted between the two support plates 225. The axis of the first lead screw 2251 is coaxial with the axis of the pressure roller 2. The two ends of the first lead screw 2251 are provided with opposing threads. The two guide posts 2252 are respectively located at both ends of the first lead screw 2251. The axes of the two guide posts 2252 are parallel to the axis of the first lead screw 2251. The second movable end 224 is sleeved on the first lead screw 2251 and the two guide posts 2252. The second movable end 224 is threadedly engaged with the first lead screw 2251 and slidably engaged with the two guide posts 2252. The sliding frame 23 is rotatably sleeved on the second movable end 224. The first rotary drive motor 2253 is fixedly connected to one of the support plates 225 on the side away from the first lead screw 2251. The first lead screw 2251 is connected to the first rotary drive motor 2253 in a transmission connection.

[0032] By activating the first rotary driver, the output shaft of the first rotary driver drives the first lead screw 2251, which is connected to it. The rotation of the first lead screw 2251 drives the second movable end 224, which is threaded to it, causing the second movable end 224 to slide along the axis of the two guide posts 2252. Since the sliding frame 23 is rotatably sleeved on the second movable end 224, the sliding of the second movable end 224 does not affect the rotation of the sliding frame 23 with the pressure roller 2. The sliding of the sliding frame 23 drives the movement of the scissor lift 24, and the movement of the scissor lift 24 drives... The movement of the first sliding rod 31 allows it to slide along the first groove 21, thereby lengthening or shortening the guide strip 3. This allows it to match material rolls of different lengths, improving the adaptability of the equipment. Simultaneously, the change in the length of the guide strip 3 alters the spacing between its multiple spirals. This variation in the spacing of the spirals better compresses the air within the wrinkles on the material roll. Furthermore, the spiral structure of the guide strip 3 continuously expels air, reducing wrinkle formation. The opposing threads at both ends of the first lead screw 2251 allow the two second movable ends 224 to slide relative to each other on the first lead screw 2251. This enables simultaneous adjustment of both ends of the guide strip 3, improving wrinkle removal efficiency, increasing efficiency, and enhancing the stability of the take-up roller 11 in taking up the material roll.

[0033] like Figure 1 , Figure 2 , Figure 10 and Figure 11 As shown: The frame 1 includes two support frames 13. Each support frame 13 is provided with a second slide groove 131 extending along the height direction of the support frame 13. Each second slide groove 131 is provided with a first slider 132 that slides and engages with it. The pressure roller 2 is rotatably disposed between the two first sliders 132. The spacing adjustment mechanism 12 is disposed on one of the support frames 13. The spacing adjustment mechanism 12 includes a second lead screw 121, a second rotary drive motor 122 and two mounting plates 123. The two mounting plates 123 are respectively fixedly connected to the top and bottom of the second slide groove 131. The second lead screw 121 is rotatably disposed between the two mounting plates 123 in a vertical state. The second rotary drive motor 122 is fixedly connected to one of the mounting plates 123. The second lead screw 121 and the second rotary drive motor 122 are connected in a transmission connection. The first slider 132 is sleeved on the second lead screw 121 and is threadedly engaged with it.

[0034] By activating the second rotary drive motor 122, the output shaft of the second rotary drive motor 122 drives the rotation of the second lead screw 121 connected to it. The rotation of the second lead screw 121 drives the first slider 132, which is threadedly engaged with it, to slide along the second slide groove 131. This causes the re-pressure roller 2 to move, allowing the re-pressure roller 2 to adjust its distance from the take-up roller 11 by sliding. This allows the re-pressure roller 2 to adjust its position as the thickness of the material roll on the take-up roller 11 increases, enabling the re-pressure roller 2 to better re-press the material roll on the take-up roller 11, reducing the formation of wrinkles on the material roll and improving the stability of the take-up roller 11 in taking up the material roll.

[0035] like Figure 1 , Figure 2 , Figure 10 and Figure 11 As shown: the pressure roller 2 is connected to the winding roller 11. A drive shaft 14 parallel to the axis of the winding roller 11 is provided on the side of the winding roller 11. Gears 141 are provided on both the winding roller 11 and the drive shaft 14, and the two gears 141 are meshed together. A synchronous belt 142 is sleeved between the pressure roller 2 and the drive shaft 14.

[0036] By using two gears 141 and their meshing connection, the take-up roller 11 can drive the drive shaft 14 to rotate when it rotates, and the rotation direction of the drive shaft 14 is opposite to that of the take-up roller 11. By using a synchronous belt 142, the drive shaft 14 can drive the secondary pressure roller 2 connected to it to rotate, thereby enabling the secondary pressure roller 2 to be driven by the take-up roller 11, reducing the investment in drive equipment and lowering the cost of the equipment.

[0037] like Figure 1 , Figure 2 and Figure 10 As shown: A tensioner 143 for tensioning the synchronous belt 142 is provided on the side of the pressure roller 2.

[0038] Because the secondary pressure roller 2 slides along the second slide groove 131 under the drive of the spacing adjustment mechanism 12, the synchronous belt 142 between the secondary pressure roller 2 and the drive shaft 14 may become loose due to the movement of the secondary pressure roller 2, making it impossible for the take-up roller to drive the secondary pressure roller 2 to operate. By setting the tensioner 143, when the secondary pressure roller 2 is adjusted, the tensioner 143 can always maintain the tension of the synchronous belt 142 between the drive shaft 14 and the secondary pressure roller 2, ensuring that the drive shaft 14 can stably transmit power to the secondary pressure roller 2 and improve the stability of equipment operation.

[0039] Furthermore, as the film thickness on the take-up roller 11 increases, the relative speed between the film and the guide strip 3 will change. Optionally, a speed change mechanism can be added to the transmission path between the pressure roller 2 and the take-up roller 11, or the pressure roller 2 can be driven by a separate mechanism to adjust the real-time rotation speed of the pressure roller 2 so that the linear speed of the guide strip 3 is equal to or greater than the linear speed of the outermost film of the take-up roller 11, thereby obtaining a better extrusion and degassing effect.

[0040] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. An adjustable winding mechanism for a film laminating machine for food packaging bag production, comprising a frame (1) and a winding roller (11) and a pressing roller (2) disposed on the frame (1), characterized in that, The re-pressure roller (2) is rotatably mounted above the take-up roller (11), and the re-pressure roller (2) rotates in the opposite direction to the take-up roller (11). A gap adjustment mechanism (12) is provided on the frame (1) to drive the re-pressure roller (2) to slide along the height direction of the frame (1). The gap adjustment mechanism (12) is used to adjust the gap between the re-pressure roller (2) and the take-up roller (11). A guide strip (3) is provided on the re-pressure roller (2) to smooth out the wrinkles on the take-up roll. The guide strip (3) has a spiral structure and is made of an elastic structure. The guide strip (3) is sleeved on the re-pressure roller (2) along its axial direction.

2. The adjustable winding mechanism of the film laminating machine for food packaging bag production according to claim 1, characterized in that, The pressure roller (2) is provided with two first grooves (21) extending along its axis. The two first grooves (21) are mirror symmetrical and located on both sides of the pressure roller (2). The first grooves (21) pass through the outer wall of the pressure roller (2). The guide strip (3) is provided with a first sliding rod (31) and a second sliding rod (32) that match the two first grooves (21). There are multiple first sliding rods (31) and multiple second sliding rods (32). The multiple first sliding rods (31) and multiple second sliding rods (32) are arranged on the guide strip (3) at equal intervals.

3. The adjustable winding mechanism of the film laminating machine for food packaging bag production according to claim 2, characterized in that, The compound pressure roller (2) is provided with sliding frames (23) that are the same number as the first sliding rods (31) and correspond one-to-one. Multiple sliding frames (23) are respectively sleeved under multiple first sliding rods (31), and all sliding frames (23) can slide along the axis of the compound pressure roller (2). The guide strip (3) is also provided with scissor frames (24), and multiple sliding frames (23) are equally spaced on the scissor frames (24).

4. The adjustable winding mechanism of the film laminating machine for food packaging bag production according to claim 3, characterized in that, The pressure roller (2) is provided with two guide rails (25) extending along its axis. Each sliding frame (23) has two support legs (231) at its bottom. The two support legs (231) are respectively provided with two slots (2311) matching the guide rails (25). The bottom of the second sliding rod (32) is provided with an arc-shaped limiting block (321) coaxial with the axis of the pressure roller (2).

5. The adjustable winding mechanism of the film laminating machine for food packaging bag production according to claim 3, characterized in that, The pressure roller (2) is hollow. Inside the pressure roller (2) is a second adjustment mechanism (22) that can adjust the length of the guide strip (3). The second adjustment mechanism (22) includes a first fixed end (221) and a first movable end (222). The first fixed end (221) is fixedly connected to one end of the pressure roller (2). The first movable end (222) is located inside the pressure roller (2) and can slide along the axial direction of the pressure roller (2). The first fixed end (221) and the second movable end (224) are respectively connected to the two ends of the guide strip (3).

6. The adjustable winding mechanism of the film laminating machine for food packaging bag production according to claim 3, characterized in that, The second adjustment mechanism (22) includes a second fixed end (223) and two second movable ends (224). The second fixed end (223) is fixedly connected to the center of the pressure roller (2). The spiral of the guide strip (3) is a structure with opposite directions from the middle to both ends. The middle part of the guide strip (3) is connected to the second fixed end (223). The two second movable ends (224) are located in the pressure roller (2) and can slide relative to each other. The two ends of the guide strip (3) are respectively connected to the two second movable ends (224).

7. The adjustable winding mechanism of the film laminating machine for food packaging bag production according to claim 6, characterized in that, The second adjustment mechanism (22) also includes a first lead screw (2251), a first rotary drive motor (2253), two support plates (225), and two guide posts (2252). The pressure roller (2) is rotatably mounted on the two support plates (225), and the two support plates (225) are located at both ends of the pressure roller (2). The first lead screw (2251) is rotatably mounted horizontally between the two support plates (225). The axis of the first lead screw (2251) is coaxial with the axis of the pressure roller (2). The two ends of the first lead screw (2251) are provided with opposing threads. The two guide posts (2252) are located on both sides of the first lead screw (2251). The axes of the two guide posts (2252) are parallel to the axis of the first lead screw (2251). The second movable end (224) is sleeved on the first lead screw (2251) and the two guide posts (2252). The second movable end (224) is threaded with the first lead screw (2251) and slidably engaged with the two guide posts (2252). The sliding frame (23) is rotatably sleeved on the second movable end (224). The first rotary drive motor (2253) is fixedly connected to one of the support plates (225) on the side away from the first lead screw (2251). The first lead screw (2251) is connected to the first rotary drive motor (2253) in a transmission connection.

8. The adjustable winding mechanism for a film laminating machine for food packaging bag production according to any one of claims 1-7, characterized in that, The frame (1) includes two support frames (13), each of which is provided with a second slide groove (131) extending along the height direction of the support frame (13). Each of the two second slide grooves (131) is provided with a first slider (132) that slides within it. The pressure roller (2) is rotatably positioned between the two first sliders (132). A spacing adjustment mechanism (12) is mounted on one of the support frames (13). The spacing adjustment mechanism (12) includes a second lead screw (121) and a second rotary drive motor (…). 122) and two mounting plates (123), the two mounting plates (123) are fixedly connected to the top and bottom of the second slide (131) respectively, the second lead screw (121) is vertically rotatably set between the two mounting plates (123), the second rotary drive motor (122) is fixedly connected to one of the mounting plates (123), the second lead screw (121) is connected to the second rotary drive motor (122) in a transmission connection, and the first slider (132) is sleeved on the second lead screw (121) and threadedly engaged with it.

9. The adjustable winding mechanism of the film laminating machine for food packaging bag production according to claim 8, characterized in that, The pressure roller (2) is connected to the winding roller (11) for transmission. A transmission shaft (14) parallel to its axis is provided on the side of the winding roller (11). Gears (141) are provided on both the winding roller (11) and the transmission shaft (14), and the two gears (141) are meshed together. A synchronous belt (142) is sleeved between the pressure roller (2) and the transmission shaft (14).

10. The adjustable winding mechanism of the film laminating machine for food packaging bag production according to claim 9, characterized in that, A tensioner (143) for tensioning the timing belt (142) is provided on the side of the pressure roller (2).

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