Cling film wrapping device

Abstract

The present invention relates to the field of plastic wrap wrapping, and specifically discloses a plastic wrap wrapping device, including an automatic wrapping mechanism, which includes a support base and a servo motor arranged on the support base, the output shaft of the servo motor is connected to a rotating component, the rotating component is provided with a paper roll control component, the surface of the support base is provided with a track limiting component, the track limiting component controls the movement track of the paper roll control component when the rotating component rotates the paper roll control component; and a tension control mechanism, which includes a support frame arranged on the outer wall of the support base, and a thrust component slidably arranged on the support frame, and also includes a wrapping component arranged on the thrust component, the thrust component controls the wrapping component to be close to the paper roll, and the wrapping component is used to wrap the paper roll. During the wrapping process, the plastic wrap can maintain good tension and limiting effect, thereby improving the flatness of the plastic wrapping and increasing the stability during the working process.

Description

Technical Field

[0001] The invention relates to the field of fresh-keeping film wrapping, in particular to a fresh-keeping film wrapping device. Background Art

[0002] Cling film is a plastic packaging product, usually made through polymerization reaction with ethylene as the masterbatch.

[0003] During the production of cling film, it needs to be rolled up by rollers and rolled into a cylinder with a larger diameter. Then it is processed and customized according to production needs and rewound into cylinders of different sizes and thicknesses to meet the customized needs of different customers. During the rewinding operation, a cling film wrapping device is needed. When the wrapping device rewinds, one end of the raw material (cling film cylinder with a large diameter) is pulled out, passes through multiple limiting rollers, and is wound on a paper roll for a second wrapping.

[0004] When wrapping the cling film, it is necessary to maintain good tension so that the rolled cling film roll can be flatter and tighter. During the rolling process, a roller that can provide pressure is generally used to press the surface of the cling film to be rolled to maintain the tension during the rolling process. However, the contact area between the roller and the cling film is small, and the pressure provided is uneven and relatively limited, which reduces the tension effect of the cling film when the wrapping device is wrapping.

[0005] For this reason, we propose a plastic wrap wrapping device to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a cling film wrapping device to solve the problem of poor cling film tension during the wrapping process mentioned in the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides a plastic wrap wrapping device, including an automatic wrapping mechanism, which includes a support seat and a servo motor arranged on the support seat, the output shaft of the servo motor is connected to a rotating component, the rotating component is provided with a paper roll control component, the surface of the support seat is provided with a trajectory limiting component, the trajectory limiting component controls the movement trajectory of the paper roll control component when the rotating component rotates the paper roll control component; and a tension control mechanism, which includes a support frame arranged on the outer wall of the support seat, and a thrust component slidably arranged on the support frame, and also includes a wrapping component arranged on the thrust component, the thrust component controls the wrapping component to be close to the paper roll, and the wrapping component is used to wrap the paper roll; and also includes a cutting mechanism, which includes a positioning component arranged on the support seat, and a film positioning component arranged on the positioning component, the external rotation of the film positioning component is provided with a cutting component.

[0008] In a further embodiment, the wrapping assembly includes an opening and closing control member provided at the end of the thrust assembly, and a clamping member provided on the opening and closing control member, wherein the opening and closing control member is used to control the opening and closing of the clamping member.

[0009] In a further embodiment, the clamping member includes a support shaft frame, and a lower arc sleeve and an upper arc sleeve rotatably arranged on the support shaft frame, the lower arc sleeve is provided with a lower fitting roller, the upper arc sleeve is provided with an upper fitting roller, and the outer wall of the support shaft frame is rotatably connected to a thrust roller; the opening and closing control member includes a connecting column arranged on the support shaft frame, and a reset spring arranged on the outside of the connecting column, and also includes a lower pressure claw arranged on the lower arc sleeve, and an upper pressure claw arranged on the upper arc sleeve.

[0010] In a further embodiment, the thrust assembly includes a sliding column slidingly arranged inside the support frame, and a support spring sleeved on the outer wall of the sliding column, and also includes a connecting plate and a baffle respectively arranged at both ends of the sliding column; the surface of the connecting plate is fixedly connected to one end of the connecting column.

[0011] In a further embodiment, the rotating assembly includes a rotating shaft provided at an output end of the servo motor, and a telescopic sleeve provided on an outer wall of the rotating shaft.

[0012] In a further embodiment, the paper roll control assembly includes a rotating telescopic member provided at one end of the telescopic sleeve, and a fixed convex disc provided at an output end of the rotating telescopic member, and the rotating telescopic member can control the rotation and extension of the fixed convex disc.

[0013] In a further embodiment, the track limiting assembly includes an inner limiting track and an outer limiting track provided on the support seat, and a sliding block slidingly provided on the surface of the inner limiting track and the outer limiting track; the sliding block is fixedly connected to the rotating telescopic member.

[0014] In a further embodiment, the positioning assembly includes an arc-shaped track provided on the support seat, and a screw rod slidably provided on the inner wall of the arc-shaped track, the outer wall of the screw rod is threadedly connected with a nut, and one end of the screw rod is provided with a connecting frame.

[0015] In a further embodiment, the membrane positioning assembly includes a cylindrical tube arranged on the connecting frame, and a limiting roller arranged inside the cylindrical tube, and a through groove is opened on the surface of the cylindrical tube.

[0016] In a further embodiment, the cutting assembly includes a rotating sleeve rotatably arranged on the outer wall of the cylindrical tube, and a counterweight block arranged on the outer wall of the rotating sleeve, the outer wall of the rotating sleeve is provided with a friction plate, the surface of the rotating sleeve is provided with a cutting groove, and also includes a cutting tool seat arranged in the through groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The wrapping component clamps the cling film roll during the wrapping process. The opening and closing control component automatically controls the clamping force of the clamping component, and ensures the wrapping effect of the cling film roll by the wrapping component through the thrust component, providing multi-point compression, increasing the pressure points and contact area, ensuring the tension during the winding process, and improving the winding effect; at the same time, after winding to a certain thickness, the cut-off mechanism can realize automatic cut-off operation; and after winding is completed, the servo motor controls the rotation of the rotating component, switches to different paper rolls for wrapping, and automatically replaces the paper rolls to improve the wrapping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a plastic wrap wrapping device;

[0020] Figure 2 Schematic diagram of the structure of the automatic wrapping mechanism of the present invention;

[0021] Figure 3 Schematic diagram of the structure of the tension control mechanism of the present invention;

[0022] Figure 4 Schematic diagram of the connection structure of the thrust assembly and the wrapping assembly in the present invention;

[0023] Figure 5 Schematic diagram of the structure of the lower arc sleeve, upper arc sleeve, lower pressure claw and upper pressure claw in the present invention;

[0024] Figure 6 Schematic diagram of the structure of the clamping member in the present invention;

[0025] Figure 7 It is a structural schematic diagram of the truncation mechanism in the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the connection between the membrane positioning component and the cutting component in the present invention;

[0027] Figure 9 This is a schematic diagram of the internal structure of the cylindrical tube in the present invention when it is opened.

[0028] In the figure: 1. Automatic wrapping mechanism; 11. Support seat; 12. Servo motor; 13. Rotating assembly; 131. Rotating shaft; 132. Telescopic sleeve; 14. Paper roll control assembly; 141. Rotating telescopic member; 142. Fixed flange; 15. Track limit assembly; 151. Inner limit rail; 152. Outer limit rail; 153. Sliding block; 2. Tension control mechanism; 21. Support frame; 22. Thrust assembly; 221. Sliding column; 222. Support spring; 223. Connecting plate; 224. Baffle; 23. Wrapping assembly; 231. Clamping member; 2311. Support shaft frame; 2312. Lower arc sleeve; 2313. 1. Lower laminating roller; 2314. Upper arc sleeve; 2315. Upper laminating roller; 2316. Thrust roller; 232. Opening and closing control member; 2321. Lower pressure claw; 2322. Upper pressure claw; 2323. Connecting column; 2324. Return spring; 3. Cutting mechanism; 31. Positioning assembly; 311. Arc track; 312. Screw; 313. Nut; 314. Connecting frame; 32. Film positioning assembly; 321. Cylindrical barrel; 322. Limiting roller; 323. Passing slot; 33. Cutting assembly; 331. Rotating sleeve; 332. Counterweight; 333. Friction plate; 334. Cutting slot; 335. Cutting knife seat. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figures 1-9In an embodiment of the present invention, a plastic wrap wrapping device includes an automatic wrapping mechanism 1, which includes a support base 11 and a servo motor 12 provided on the support base 11. The output shaft of the servo motor 12 is connected to a rotating assembly 13. The rotating assembly 13 is provided with a paper roll control assembly 14. The surface of the support base 11 is provided with a track limit assembly 15. The track limit assembly 15 controls the movement track of the paper roll control assembly 14 when the rotating assembly 13 rotates the paper roll control assembly 14. The support base 11 is a U-shaped frame with an upward opening, which is placed on the ground for support. The motor 12 is fixedly mounted on the outer surface of the support base 11. The output shaft of the servo motor 12 passes through the support base 11 and is fixedly connected to the rotating assembly 13. The servo motor 12 can control the rotation of the rotating assembly 13. The paper roll control assembly 14 is fixed to the end of the rotating assembly 13. The rotation of the rotating assembly 13 can drive the paper roll control assembly 14 to move. The track limit assembly 15 is symmetrically arranged on both sides of the inner wall of the support base 11 to guide and limit the movement of each paper roll control assembly 14, making it convenient to switch between different paper rolls for winding operations.

[0032] And, the tension control mechanism 2 includes a support frame 21 provided on the outer wall of the support base 11, and a thrust component 22 slidably provided on the support frame 21, and also includes a wrapping component 23 provided on the thrust component 22, the thrust component 22 controls the wrapping component 23 to be close to the paper roll, and the wrapping component 23 is used to wrap the paper roll. The support frame 21 is a C-shaped structure, fixed to the side of the support base 11, the thrust component 22 passes through the support frame 21, and the wrapping component 23 clamps the paper roll. The thrust component 22 provides thrust to keep the wrapping component 23 in contact with the paper roll, so that the paper roll can maintain contact with the paper roll when the cling film is wrapped, and provides tension to ensure the flatness of the cling film when wrapping;

[0033] It also includes a cutting mechanism 3, which includes a positioning component 31 provided on the support seat 11, and a film positioning component 32 provided on the positioning component 31. The outer rotation of the film positioning component 32 is provided with a cutting component 33. The positioning component 31 is provided on the top of the support seat 11. The positioning component 31 can adjust the position of the film positioning component 32, and limit the cling film through the film positioning component 32. After the wrapping is completed, the cling film can be cut off by rotating the cutting component 33.

[0034] Specifically, the wrapping component 23 includes an opening and closing control component 232 provided at the end of the thrust component 22, and a clamping component 231 provided on the opening and closing control component 232. The opening and closing control component 232 is used to control the opening and closing of the clamping component 231. The opening and closing control component 232 can automatically control the opening and closing size of the clamping component 231 according to the thickness of the plastic wrap roll. During the wrapping process, the clamping component 231 presses the continuously rolled plastic wrap on the surface of the rolled plastic wrap to improve the winding effect.

[0035] Furthermore, the clamping member 231 includes a support shaft frame 2311, and a lower arc sleeve 2312 and an upper arc sleeve 2314 rotatably arranged on the support shaft frame 2311, a lower laminating roller 2313 is provided on the lower arc sleeve 2312, and an upper laminating roller 2315 is provided on the upper arc sleeve 2314. The outer wall of the support shaft frame 2311 is rotatably connected to the thrust roller 2316. In this embodiment, three notches are provided in the interior of the lower arc sleeve 2312 and the upper arc sleeve 2314, and the lower laminating roller 2313 and the upper laminating roller 2315 are fixed to the lower arc sleeve 2312 and the upper arc sleeve 2314 respectively through the three notches. The lower and upper laminating rollers 2313 and 2315 are provided at the end positions away from the support shaft frame 2311, so as to prevent the lower arc sleeve 2312 and the upper arc sleeve 2314 from scratching and damaging the cling film. The lower and upper arc sleeves 2312 and 2314 can rotate on the surface of the support shaft frame 2311 to open and close. As the thickness of the cling film increases after being rolled, the cling film can be adjusted. When in use, the cling film is pressed and rolled by the thrust roller 2316 and the lower and upper laminating rollers 2313 and 2315, so as to prevent the lower and upper arc sleeves 2312 and 2314 from directly contacting the cling film, thereby facilitating the rolling and forming of the cling film and preventing scratches.

[0036] The opening and closing control member 232 includes a connecting column 2323 provided on the support shaft frame 2311, and a return spring 2324 sleeved on the outside of the connecting column 2323, and also includes a lower pressure claw 2321 provided on the lower arc sleeve 2312, and an upper pressure claw 2322 provided on the upper arc sleeve 2314. In this embodiment, the lower pressure claw 2321 on the lower arc sleeve 2312 is curved, and the support shaft frame 2311 is evenly provided with a plurality of connecting columns 2323. The outside of each connecting column 2323 is sleeved with a return spring 2324, and the number of the lower pressure claws 2321 and the upper pressure claws 2322 is half the number of the connecting columns 2323. The lower pressure claws 2321 and the upper pressure claws 2322 are respectively evenly provided on the outer surfaces of the lower arc sleeve 2312 and the upper arc sleeve 2314. The force claws 2321 and the upper pressure claws 2322 are staggered, and guide grooves are provided inside the lower pressure claws 2321 and the upper pressure claws 2322, and the connecting column 2323 passes through the guide grooves. When in use, the reset spring 2324 provides elastic force to push up the lower pressure claws 2321 and the upper pressure claws 2322, so that the lower arc sleeve 2312 and the upper arc sleeve 2314 remain in a clamped state, and as the thickness of the cling film increases, the opening and closing angles of the lower arc sleeve 2312 and the upper arc sleeve 2314 increase, and the curved lower pressure claws 2321 and the upper pressure claws 2322 slide on the outer wall of the connecting column 2323, compressing the reset spring 2324 at the same time, increasing the clamping force of the lower arc sleeve 2312 and the upper arc sleeve 2314, thereby providing sufficient tension to the cling film to ensure the cling of the cling film.

[0037] Among them, the thrust assembly 22 includes a sliding column 221 slidably arranged inside the support frame 21, and a supporting spring 222 sleeved on the outer wall of the sliding column 221, and also includes a connecting plate 223 and a baffle 224 respectively arranged at both ends of the sliding column 221; the surface of the connecting plate 223 is fixedly connected to one end of the connecting column 2323, and the sliding column 221 is provided with several, and the elastic force provided by the supporting spring 222 is greater than the elastic force of the return spring 2324. In the process of increasing thickness of the cling film, the elastic force of the supporting spring 222 can push the thrust roller 2316 to always keep in contact with the surface of the cling film, and the other upper bonding roller 2315 and the lower bonding roller 2313 will change the bonding position according to the change in the diameter of the cling film roll, which can ensure that at least three rollers are in contact with the cling film roll and maintain good tension. Moreover, as the thickness increases, the position of the wrapping assembly 23 can be self-adjusted by the compression of the supporting spring 222, thereby ensuring the limiting and clamping effect of the cling film roll during the wrapping process.

[0038] In summary, the plastic wrap can maintain good tension and limiting effect during the wrapping process, improve the flatness of the plastic wrap wrap, increase stability during the work process, and avoid deviation.

[0039] Example 2

[0040] See also Figures 1-9 , which is the second embodiment of the present invention. Different from the previous embodiment, the rotating assembly 13 includes a rotating shaft 131 provided at the output end of the servo motor 12, and a telescopic sleeve 132 provided on the outer wall of the rotating shaft 131. The servo motor 12 can control the rotating shaft 131 to rotate at different angles. The telescopic sleeve 132 can control the position of the paper roll control assembly 14 by self-expansion. Four telescopic sleeves 132 are symmetrically arranged at both ends of the rotating shaft 131 and distributed in a circle. They can fix multiple paper roll control assemblies 14, making it convenient to rotate out the wrapped cling film roll and switch to a new paper roll.

[0041] Specifically, the paper roll control assembly 14 includes a rotating telescopic part 141 provided at one end of the telescopic sleeve 132, and a fixed cam 142 provided at the output end of the rotating telescopic part 141. The rotating telescopic part 141 can control the rotation and extension of the fixed cam 142. The protrusion in the middle of the fixed cam 142 can be inserted into the interior of the paper roll to control the extension and extension of the rotating telescopic part 141 to fix or drop the paper roll. The rotation of the rotating telescopic part 141 controls the paper roll to rewind the cling film, which facilitates the unloading of the wrapped cling film roll.

[0042] Furthermore, the track limiting assembly 15 includes an inner limiting track 151 and an outer limiting track 152 provided on the support seat 11, and a sliding block 153 slidingly provided on the surface of the inner limiting track 151 and the outer limiting track 152; the sliding block 153 is fixedly connected to the rotating telescopic member 141, the inner limiting track 151 is provided inside the outer limiting track 152, and the sliding block 153 is slidably provided inside the gap formed by the inner limiting track 151 and the outer limiting track 152, wherein the inner limiting track The upper part of 151 and the outer limit track 152 is a horizontal track, while the lower part is an arc-shaped structure. During the rotation of the servo motor 12, as the inner limit track 151 and the outer limit track 152 guide the sliding block 153, the telescopic sleeve 132 is extended and retracted, so that the paper roll moves straight toward the tension control mechanism 2. When the rotating shaft 131 rotates to take out the rolled cling film, the paper roll moves in an arc shape, and the replacement operation is carried out in sequence, thereby improving the switching efficiency of the cling film roll.

[0043] During actual use, the paper roll moves straight toward the openings of the upper arc sleeve 2314 and the lower arc sleeve 2312, and the paper roll pushes the front end of the hanging plastic wrap. Since the upper arc sleeve 2314 and the front ends of the lower arc sleeve 2312 are provided with an upper laminating roller 2315 and a lower laminating roller 2313, the elastic force of the support spring 222 is greater than the return spring 2324. At this time, the return spring 2324 is compressed, and the circular paper roll will push the upper laminating roller 2315 and the lower laminating roller 2313 away, so that the upper arc sleeve 2314 and the lower arc sleeve 2312 are automatically opened, sleeved and clamped on the outside of the paper roll, and the plastic wrap and the paper roll are pressed into the upper arc sleeve 2314 and the lower arc sleeve 2312 together, which is convenient for winding.

[0044] In addition, after the winding is completed, the rotating shaft 131 rotates, the sliding block 153 slides, and the paper roll changes to an arc motion, driving the rolled cling film roll to be pressed down. At this time, the support spring 222 is slightly compressed to provide the cling film roll with lateral displacement, and the lower arc sleeve 2312 increases the opening and closing angle. The return spring 2324 continues to compress until the cling film roll is separated from the lower arc sleeve 2312 and rotated out from the inside of the wrapping component 23, completing the material extraction operation. The lower arc sleeve 2312 and the upper arc sleeve 2314 are reset by the elastic force of the return spring 2324 and the support spring 222 to allow a new paper roll to be inserted, and the rotating telescopic part 141 contracts, causing the fixed convex disc 142 to open, and the rolled cling film roll is removed.

[0045] In summary, the cling film wrapping device can realize the operation of automatic unloading and loading of materials, thereby improving the wrapping efficiency.

[0046] Example 3

[0047] See also Figures 1-9 , which is the third embodiment of the present invention. Different from the previous embodiment, the positioning assembly 31 includes a curved track 311 provided on the support seat 11, and a screw 312 slidably provided on the inner wall of the curved track 311. The outer wall of the screw 312 is threadedly connected with a nut 313, and one end of the screw 312 is provided with a connecting frame 314. In this embodiment, screws 312 are provided at both ends of the connecting frame 314, and two nuts 313 are provided on the outside of each screw 312. The nuts 313 are provided on both sides of the curved track 311. The sliding screw 312 can change the position of the connecting frame 314. The curved track 311 is clamped by rotating the nut 313 to complete the fixation of the connecting frame 314, which can facilitate the adjustment of the position of the cutting assembly 33.

[0048] Specifically, the film positioning assembly 32 includes a cylindrical tube 321 arranged on the connecting frame 314, and a limiting roller 322 arranged inside the cylindrical tube 321. A through groove 323 is provided on the surface of the cylindrical tube 321. In this embodiment, the cylindrical tube 321 is a hollow structure, and a through groove 323 is provided on the top and bottom for the plastic-keeping film to pass through. There are four limiting rollers 322, and each two limiting rollers 322 form a group. The center of each group of limiting rollers 322 corresponds to the through groove 323, so as to avoid damage to the plastic-keeping film caused by contact between the cylindrical tube 321 and the through groove 323, and to prevent scratches.

[0049] The cam 332 is provided with a plurality of support members 334 on the cam 334, and the support members 335 are provided with a plurality of support members 334 on the cam 334. The support members 335 are provided with a plurality of support members 334 on the cam 334, and the support members 335 are provided with a plurality of support members 334 on the cam 334. The support members 335 are provided with a plurality of support members 334 on the cam 334, and the support members 335 are provided with a plurality of support members 334 on the cam 334. The support members 335 are provided with a plurality of support members 334 on the cam 334, and the support members 335 are provided with a plurality of support members 334 on the cam 334. The support members 335 are provided with a plurality of support members 334 on the cam 334, and the support members 335 are provided with a plurality of support members 334.

[0050] During actual use, the position of the film positioning component 32 is adjusted by the positioning component 31 so that the rotating sleeve 331 is close to the upper arc sleeve 2314. As the diameter of the cling film roll increases with the winding, the openings of the upper arc sleeve 2314 and the lower arc sleeve 2312 gradually become larger. Finally, the upper bonding roller 2315 at the front end of the upper arc sleeve 2314 contacts the surface of the cling film roll. When in contact, due to the winding of the cling film roll, the upper bonding roller 2315 is in a rolling state. When the rolling upper bonding roller 2315 contacts the friction plate 333, it drives the rotating sleeve 331 to rotate, realizing the cutting operation. Automatic cutting can be achieved by adjusting the film positioning component 32 and the cutting component 33 to the appropriate position, thereby improving the degree of automation.

[0051] In summary, the plastic wrap wrapping device is convenient for cutting operations.

[0052] The working principle of the present invention is as follows: the position of the cutting assembly 33 is adjusted, the sliding screw 312 changes the position of the connecting frame 314, the nut 313 is rotated to clamp the arc track 311, and the connecting frame 314 is fixed. Then, the plastic wrap is passed through the slot 323 and the limiting roller 322, and passes through the cutting slot 334, and is hung in front of the upper arc sleeve 2314 and the lower arc sleeve 2312. When working, the servo motor 12 drives the rotating shaft 131 to rotate. During the rotation of the servo motor 12, as the inner limiting track 151 and the outer limiting track 15 Under the guidance of the two pairs of sliding blocks 153, the telescopic sleeve 132 is extended and retracted, and the paper roll pushes the hanging fresh-keeping film. Since the upper and lower arc sleeves 2314 and 2312 are provided with an upper laminating roller 2315 and a lower laminating roller 2313 at the front ends, the elastic force of the support spring 222 is greater than the return spring 2324. At this time, the return spring 2324 is compressed, and the circular paper roll pushes the upper and lower laminating rollers 2315 and 2313 apart, so that the upper and lower arc sleeves 2314 and 2312 are automatically opened, sleeved and clamped on the outside of the paper roll, pressing the fresh-keeping film and the paper roll together. The upper arc sleeve 2314 and the lower arc sleeve 2312 are inserted into the paper roll, and the paper roll is controlled by rotating the telescopic member 141 to roll up the cling film. When rolling, as the thickness of the cling film increases after being rolled, the opening and closing angles of the lower arc sleeve 2312 and the upper arc sleeve 2314 increase, and the curved lower pressure claw 2321 and the upper pressure claw 2322 slide on the outer wall of the connecting column 2323, while compressing the return spring 2324, increasing the clamping force of the lower arc sleeve 2312 and the upper arc sleeve 2314, thereby providing sufficient tension to the cling film. As the thickness increases, the cling film can be tightened by The compression of the support spring 222 self-adjusts the position of the wrapping component 23. As the diameter of the cling film roll increases with the winding, the openings of the upper arc sleeve 2314 and the lower arc sleeve 2312 gradually become larger. Finally, when the rolling upper bonding roller 2315 contacts the friction plate 333, it will drive the rotating sleeve 331 to rotate to achieve the cutting operation. After the cutting is completed, when the rotating shaft 131 rotates to take out the rolled cling film, the paper roll changes to an arc motion and performs the replacement operation in sequence. The rotating telescopic part 141 contracts, causing the fixed convex disc 142 to open, and the rolled cling film roll is removed.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0054] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A plastic wrapping device, characterized in that: include, An automatic wrapping mechanism (1) comprises a support base (11) and a servo motor (12) arranged on the support base (11); an output shaft of the servo motor (12) is connected to a rotating assembly (13); a paper roll control assembly (14) is arranged on the rotating assembly (13); a track limiting assembly (15) is provided on the surface of the support base (11); the track limiting assembly (15) controls the motion track of the paper roll control assembly (14) when the rotating assembly (13) rotates the paper roll control assembly (14); and a tension control mechanism (2), comprising a support frame (21) disposed on the outer wall of the support seat (11), and a thrust assembly (22) slidably disposed on the support frame (21), and further comprising a wrapping assembly (23) disposed on the thrust assembly (22), wherein the thrust assembly (22) controls the wrapping assembly (23) to be in close contact with the paper roll, and the wrapping assembly (23) is used to wrap the paper roll; It also includes a cutting mechanism (3), which includes a positioning assembly (31) provided on the support seat (11), and a film positioning assembly (32) provided on the positioning assembly (31), wherein the outer portion of the film positioning assembly (32) is provided with a cutting assembly (33); The wrapping assembly (23) includes an opening and closing control member (232) provided at the end of the thrust assembly (22), and a clamping member (231) provided on the opening and closing control member (232), wherein the opening and closing control member (232) is used to control the opening and closing of the clamping member (231); The clamping member (231) includes a support shaft frame (2311), and a lower arc-shaped sleeve (2312) and an upper arc-shaped sleeve (2314) rotatably arranged on the support shaft frame (2311); a lower laminating roller (2313) is arranged on the lower arc-shaped sleeve (2312), and an upper laminating roller (2315) is arranged on the upper arc-shaped sleeve (2314); and a thrust roller (2316) is rotatably connected to the outer wall of the support shaft frame (2311); The opening and closing control member (232) includes a connecting column (2323) provided on the supporting shaft frame (2311), and a return spring (2324) sleeved on the outside of the connecting column (2323), and also includes a lower pressure claw (2321) provided on the lower arc-shaped sleeve (2312), and an upper pressure claw (2322) provided on the upper arc-shaped sleeve (2314); The thrust assembly (22) includes a sliding column (221) slidably arranged inside the support frame (21), a support spring (222) sleeved on the outer wall of the sliding column (221), and also includes a connecting plate (223) and a baffle (224) respectively arranged at both ends of the sliding column (221); The surface of the connecting plate (223) is fixedly connected to one end of the connecting column (2323); The track limiting assembly (15) comprises an inner limiting track (151) and an outer limiting track (152) arranged on the support seat (11), and a sliding block (153) slidingly arranged on the surfaces of the inner limiting track (151) and the outer limiting track (152).

2. The cling film wrapping device according to claim 1, characterized in that: The rotating assembly (13) comprises a rotating shaft (131) arranged at the output end of the servo motor (12), and a telescopic sleeve (132) arranged on the outer wall of the rotating shaft (131).

3. The plastic wrapping device according to claim 2, characterized in that: The paper roll control assembly (14) comprises a rotating telescopic member (141) provided at one end of the telescopic sleeve (132), and a fixed convex disc (142) provided at the output end of the rotating telescopic member (141). The rotating telescopic member (141) can control the rotation and extension of the fixed convex disc (142).

4. The plastic wrapping device according to claim 1, characterized in that: The sliding block (153) and the rotating telescopic member (141) are fixedly connected.

5. The cling film wrapping device according to claim 1, characterized in that: The positioning assembly (31) comprises an arc track (311) provided on the support seat (11), and a screw rod (312) slidably provided on the inner wall of the arc track (311), the outer wall of the screw rod (312) being threadedly connected to a nut (313), and one end of the screw rod (312) being provided with a connecting frame (314).

6. The plastic wrapping device according to claim 5, characterized in that: The membrane positioning assembly (32) comprises a cylindrical tube (321) arranged on the connecting frame (314), and a limiting roller (322) arranged inside the cylindrical tube (321); a through groove (323) is provided on the surface of the cylindrical tube (321).

7. The plastic wrapping device according to claim 6, characterized in that: The cutting assembly (33) includes a rotating sleeve (331) rotatably arranged on the outer wall of the cylindrical barrel (321), and a counterweight (332) arranged on the outer wall of the rotating sleeve (331). The outer wall of the rotating sleeve (331) is provided with a friction plate (333). The surface of the rotating sleeve (331) is provided with a cutting groove (334). The rotating sleeve (331) also includes a cutting knife seat (335) arranged in the through groove (323).

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