A secondary leveling device for plastic film

Abstract

The present application relates to a secondary flattening device for plastic film, comprising a frame having an inlet and an outlet. The frame is movably mounted on upper and lower tensioning roller groups of the frame. Slides are symmetrically arranged within the frame, one of the slides being provided with a first slider, the other being provided with a second slider, a replacement roller being rotatably arranged between the first and second sliders, a transmission assembly being provided between the upper and lower tensioning roller groups, the first slider driving the transmission assembly to force the upper and lower tensioning roller groups toward or away from each other when sliding on the slide; a wavy path being formed between the upper and lower tensioning roller groups when they approach each other; a heating element being fixedly mounted on each of the upper and lower tensioning roller groups; a driving element being fixedly mounted on the side wall of the outlet of the frame; a power assist lever being fixed on the second slider; and a bracket being fixedly mounted on the slide near the inlet of the frame. The present application has the effect of improving the secondary flattening of plastic film.

Description

Technical Field

[0001] The present application relates to the field of plastic film processing, and in particular to a plastic film secondary flattening device. Background Art

[0002] Plastic film has a wide range of applications, including in construction, healthcare, packaging, and other industries. Plastic film is produced through calendering and lamination, and can be laminated with a variety of materials, including wood, plastic, and metal sheets. It can also be used as a surface protective film for household appliances and electronic devices, encompassing a wide range of applications.

[0003] Taking PVC plastic film as an example, after production is completed, the PVC plastic film will be wound into a roll using a reel core, and then transported to a storage point by transportation equipment for storage and stacking, and then sold in bulk or individually.

[0004] However, as the storage and stacking time increases, the rolled PVC plastic film will inevitably soften and deform, and needs to be flattened twice before it can be sold. Summary of the Invention

[0005] In order to improve the efficiency of plastic film re-leveling, the present application provides a plastic film secondary leveling device.

[0006] The present application provides a plastic film secondary flattening device that adopts the following technical solution:

[0007] The lifting mechanism comprises a lifting mechanism, a lifting mechanism, a lifting mechanism, a lifting mechanism being further constructed so that the lifting mechanism can be lifted up and down by the lifting of the lifting mechanism, and a lifting mechanism being further constructed so that the lifting mechanism can be lifted and down by the lifting of the lifting mechanism. The upper tensioning roller group and the lower tensioning roller group move away from each other; when the replacement roller moves toward the outlet of the frame, the upper tensioning roller group and the lower tensioning roller group approach each other; when the upper tensioning roller group and the lower tensioning roller group approach each other, a wavy path is formed between the two; the upper tensioning roller group and the lower tensioning roller group are both fixedly provided with heating elements, and the outlet side wall of the frame is fixedly provided with a driving element that can engage with the replacement roller; the second slider is provided with a power assist rod; pushing the power assist rod can force the replacement roller to move toward the entrance or exit direction of the frame, and the slide is fixedly provided with a bracket near the entrance of the frame.

[0008] With the above-described technical solution, a bracket at the machine entrance is used to place PVC film rolls requiring secondary flattening. Rotation of the power lever drives the replacement roller to the machine entrance, allowing workers to conveniently wind the end of the PVC film roll onto the replacement roller. When the power lever drives the replacement roller toward the machine exit, the transmission assembly drives the upper and lower tensioning rollers toward each other, tensioning the PVC film between them. As the upper and lower tensioning rollers approach, the heating element also moves closer to the PVC film, facilitating softening and achieving better tensioning and flattening. Before the upper and lower tensioning rollers approach, they provide space for the replacement roller to move, allowing it to move from the machine entrance to the exit. When the replacement roller reaches the exit, the wavy path formed between the upper and lower tensioning rollers maintains tension on both the upper and lower surfaces of the PVC film, enhancing tensioning effectiveness. By first winding the PVC film onto the replacement roller and then tensioning it through the upper and lower tensioning rollers, workers can reduce the time it takes to pass the PVC film through the wavy path between the upper and lower tensioning rollers. This is convenient and quick, improving the efficiency of re-flattening the film. The first and second sliders and carriages allow the replacement roller to slide smoothly within the frame. Rotating the power lever drives the replacement roller toward the frame's entrance or exit, facilitating its movement and improving worker efficiency.

[0009] Optionally, the transmission assembly includes a transmission roller and a transmission gear, the transmission gear is fixedly arranged in the middle of the transmission roller, the upper part of the transmission roller is threadedly connected to the upper tensioning roller group, the lower part of the transmission roller is threadedly connected to the lower tensioning roller group, and the first slider is fixedly provided with a transmission rack that can engage with the transmission gear.

[0010] By adopting the above technical solution, the transmission gear is positioned in the middle of the transmission roller, preventing it from interfering with the movement of the upper and lower tensioning roller groups. The threaded transmission allows the transmission roller to rotate and drive the movement of the upper and lower tensioning roller groups. Furthermore, when the transmission rack is disengaged from the transmission gear, the threaded transmission provides a self-locking effect, preventing the upper and lower tensioning roller groups from moving relative to each other in the absence of external forces. The transmission rack is positioned on the first slider, and through a linkage mechanism, the upper and lower tensioning roller groups also move simultaneously with the movement of the replacement roller. These rollers can move away from each other to provide space for the replacement roller to move, and can also move closer together to tension the PVC plastic film, improving work efficiency.

[0011] Optionally, the slide is provided with a rolling rack, the replacement roller is fixedly provided with a rolling gear that can engage with the rolling rack, and the output shaft of the driving member is provided with a driving gear; when the rolling gear is disengaged from the rolling rack, the rolling gear can engage with the driving gear.

[0012] By adopting the above technical solution and setting a rolling rack, the replacement roller can also rotate when moving from the entrance to the exit of the frame. The rotation of the replacement roller can further wind and tighten the PVC plastic film to prevent the PVC plastic film from being separated from the replacement roller when the replacement roller moves. When the replacement roller is engaged with the driving gear of the driving member, the PVC plastic film can always be tightly wound around the replacement roller. The rolling gear can only be engaged with the driving gear after being disengaged from the rolling rack, avoiding the problem of locking caused by interference between the rolling rack and the driving gear.

[0013] Optionally, the second slider is provided with a quick-release slot, and a quick-release plate is slidingly provided in the quick-release slot close to the side wall of the frame. The replacement roller is mounted in the quick-release slot of the second slider and one end is sleeved on the quick-release plate; a quick-release elastic member is provided between the quick-release plate and the second slider, and a clearance slot is provided on the inner side wall of the frame for the quick-release plate to be detached from one end of the replacement roller.

[0014] By adopting the above technical solution, when the core on the replacement roller needs to be removed and replaced, it is only necessary to move the second slider to align the quick-release disc with the clearance slot. That is, under the action of the quick-release elastic member, the quick-release disc can slide out from the side wall of the quick-release slot to the clearance slot, thereby separating the quick-release disc from the replacement roller and allowing the replacement roller to be taken out of the quick-release slot. When a new core is placed in the replacement roller, it is only necessary to place the replacement roller on the quick-release slot of the second slider and then push the second slider. The quick-release disc can be pushed through the side wall of the clearance slot to move the quick-release disc into the quick-release slot. The quick-release disc is then placed on the replacement roller to prevent the replacement roller from separating from the second slider. This quick-release method can improve the efficiency of the staff in removing the core from the replacement roller and shorten the overall working time of the secondary leveling.

[0015] Optionally, a hot melt fixing component is provided at the entrance of the frame, and the hot melt fixing component (5) includes a hot melt table, a hot melt elastic member and a hot melt roller arranged in the hot melt table. A hot melt groove is provided on the side wall of the frame, and both ends of the hot melt table are slidably arranged in the hot melt groove. One end of the hot melt elastic member is fixed to the upper wall of the frame, and the other end is fixed to the upper part of the hot melt table. The hot melt roller can be exposed in the hot melt table. The hot melt table is also provided with an anti-scalding component that hides the hot melt roller in the hot melt roller; when the hot melt roller is exposed in the hot melt table, the hot melt roller can abut against the replacement roller.

[0016] By adopting the above technical solution, the hot melt elastic member can reset the hot melt table, and the hot melt groove can guide the movement of the hot melt table, making it less likely for the hot melt roller to tilt. It is convenient to hot-melt the PVC plastic film to the core of the replacement roller. The hot melt method can initially fix the PVC plastic film to the replacement roller, allowing the PVC to be wound around the core of the replacement roller without loosening when the replacement roller rotates. The anti-scalding component can hide the hot melt roller inside the hot melt table when not in use, reducing contact between workers and the hot melt roller and reducing the possibility of accidental burns.

[0017] Optionally, the anti-scalding component includes an anti-scalding shell, a transmission block and a fixed rod; both ends of the hot melt roller are fixed in the anti-scalding shell, the anti-scalding shell can slide relative to the hot melt table, the side wall of the anti-scalding shell is connected to the inner wall of the hot melt table through an anti-scalding elastic member, the transmission block is rotatably arranged inside the hot melt table, one end of the transmission block is stuck in the side wall of the anti-scalding shell, and both ends of the fixed rod are fixedly arranged on the side walls of the hot melt groove; when the hot melt table moves downward, the fixed rod can push the transmission block to rotate and force the anti-scalding shell to move toward the opening direction of the hot melt table, and the side wall of the hot melt groove is provided with a limit assembly for limiting the downward movement of the hot melt table.

[0018] By adopting the above technical solution, the anti-scalding cover can reduce the heat transferred from the hot melt roller to the hot melt table, preventing the hot melt table from overheating and affecting the operator's manual movement of the hot melt table. When the hot melt table is moved, it moves toward the fixed rod. When the PVC plastic film needs to be hot-melted, the hot melt table opening is simply pointed toward the PVC plastic film on the replacement roller. As the hot melt table moves, the fixed rod pushes the transmission block, which in turn pushes the anti-scalding cover to move, allowing the hot melt roller to exit the hot melt table. When the hot melt is completed, the hand is removed from the hot melt table, and the hot melt elastic member pulls the hot melt table upward to reset. At the same time, the upward movement of the hot melt table pulls the fixed rod away from the transmission block, and the anti-scalding cover is pulled into the hot melt table by the anti-scalding elastic member. When the hot melt table is not in operation, a limit assembly can limit the hot melt table's downward movement, thereby preventing the hot melt roller from exiting the hot melt table.

[0019] Optionally, the limiting assembly includes a limiting slider that can slide on the frame and a limiting elastic member, the limiting slider is provided with a limiting slot, and the limiting elastic member can force the limiting slot and the hot melt slot to be staggered with each other.

[0020] By adopting the above technical solution, when the hot melt table is not in operation, the limit slide and the hot melt groove are offset from each other, so that part of the limit slide is located in the hot melt groove. At this time, when the staff manually pushes the hot melt table, the hot melt table will abut against the limit slide, thus preventing the hot melt table from moving toward the fixing rod. This not only allows the staff to realize that hot melt fixing is not needed at this time, but also prevents the hot melt roller from coming out of the hot melt table, thereby improving the safety of the hot melt table.

[0021] Optionally, the power assist rod is fixed with a limiting portion, the power assist rod is provided with a linkage groove, the second slider is extended with a linkage rod, and the linkage rod is passed through the linkage groove; when the power assist rod forces the replacement roller to move toward the entrance direction of the frame, the limiting portion can push the limiting slider, forcing the limiting slide groove and the hot melt groove to align with each other.

[0022] By adopting the above technical solution, when the hot melt station is in working condition, it means that the power rod has pushed the replacement roller to the entrance position of the frame, and the limiting slider will be pushed by the limiting part to put the limiting elastic part in the power storage state. At this time, the limiting slide groove and the hot melt groove are aligned with each other. After the staff wraps the PVC plastic film onto the core of the replacement roller, they can push the hot melt station to let the hot melt roller hot-melt the PVC plastic film on the core. The linkage groove can be used to provide displacement space for the linkage rod, so that the power rod can drive the movement of the second slider and the first slider when rotating, thereby realizing the movement of the replacement roller. When the replacement roller moves toward the exit direction of the frame. The limiting part also moves. At this time, the limiting elastic part will release the pressure to push the limiting slider to move, so that the limiting slide groove on the limiting slider is staggered with the hot melt groove again. At this time, the hot melt station is not in working condition.

[0023] Optionally, the lower portion of the power-assisting rod cooperates with the frame to form a rotation point; when the power-assisting rod rotates toward the entrance of the frame, the limiting portion and the linkage rod are closer to the entrance side of the frame than the rotation point; when the power-assisting rod rotates toward the exit of the frame, the limiting portion and the linkage rod are closer to the exit side of the frame than the rotation point.

[0024] By adopting the above technical solution, when the power-assisting lever is driven to rotate toward the entrance of the rack, when the position-limiting portion and the linkage lever are closer to the entrance of the rack than the rotation point, the weight of the power-assisting lever will cause the power-assisting lever to rotate toward the entrance of the rack, thereby providing power assistance. Conversely, when the power-assisting lever is driven to rotate toward the exit of the rack, when the position-limiting portion and the linkage lever are closer to the exit of the rack than the rotation point, the weight of the power-assisting lever will cause the power-assisting lever to rotate toward the exit of the rack.

[0025] Optionally, the power lever has a first lever and a second lever, the limiting portion is fixed to the first lever, the linkage groove is provided in the second lever, and a grip is fixed between the first lever and the second lever.

[0026] By adopting the above technical solution, the first rod is used to support the fixed part, and the second rod is used to drive the linkage rod to move. The first rod and the second rod can enable the limit assembly to link the limit of the hot melt table and the movement of the replacement roller, so as to judge whether the hot melt table is in a working state, thereby improving the safety factor and reducing the operation. It can be achieved by simply turning the power lever, saving time and effort, and improving the work efficiency of the secondary leveling.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The method of first winding the PVC plastic film onto the replacement roller and then tensioning it through the upper tensioning roller group and the lower tensioning roller group can reduce the time for workers to pass the PVC plastic film through the wavy path between the upper tensioning roller group and the lower tensioning roller group in sequence.

[0029] 2. The linkage mode realizes that when the replacement roller moves, the upper tensioning roller group and the lower tensioning roller group will also move. They can move away from each other to provide moving space for the replacement roller, and can also move closer to each other to achieve tensioning of the PVC plastic film, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is the overall structure of the device Figure 1 .

[0031] Figure 2 This is the overall structure of the device Figure 2 .

[0032] Figure 3 This is a partial structural diagram of the device Figure 1 .

[0033] Figure 4 It is a schematic diagram of part of the slope structure of this device.

[0034] Figure 5 It is a schematic diagram of the cross-sectional structure of the hot melt fixing component in this device.

[0035] Figure 6 It is a schematic diagram of the exploded structure of the hot melt fixing component in this device.

[0036] Figure 7 yes Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0037] Figure 8 It is a partial structural diagram of the limit assembly in this device.

[0038] Figure 9 This is a partial structural diagram of the device Figure 2 .

[0039] Figure 10 This is a partial structural diagram of the device Figure 3 .

[0040] Figure 11 It is a schematic diagram of the wavy path formed by the upper tensioning roller group and the lower tensioning roller group.

[0041] Figure 12 This is a partial structural diagram of the device Figure 4 .

[0042] Figure 13 It is a schematic diagram of the exploded structure of the second slider in this device.

[0043] Explanation of reference numerals: 1. frame; 11. inlet; 12. outlet; 13. upper tensioning roller group; 14. lower tensioning roller group; 15. wavy path; 16. heating element; 17. driving element; 171. driving gear; 2. slide; 21. first slider; 22. second slider; 221. quick release slot; 222. quick release plate; 223. quick release elastic member; 224. clearance slot; 23. replacement roller; 231. rolling gear; 232. rolling rack; 24. bracket; 3. transmission assembly; 31. transmission roller; 32. transmission Gear; 33, transmission rack; 4, power lever; 41, limit part; 42, linkage groove; 43, linkage lever; 44, rotation point; 45, first lever; 46, second lever; 47, gripping lever; 48, through groove; 5, hot melt fixing assembly; 51, hot melt table; 52, hot melt elastic part; 53, hot melt roller; 54, hot melt groove; 6, anti-scalding assembly; 61, anti-scalding shell; 62, transmission block; 63, fixing rod; 64, anti-scalding elastic part; 7, limit assembly; 71, limit slider; 72, limit elastic part; 73, limit slide groove. DETAILED DESCRIPTION

[0044] The terms "up," "down," "left," "right," "front," "back," "front," "back," "top," and "bottom" mentioned or potentially mentioned in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may vary depending on their location or usage. Therefore, these or other directional terms should not be interpreted as restrictive. In addition, the terms "first," "second," "third," and similar expressions are used only for descriptive and distinguishing purposes and should not be understood to indicate or imply the relative importance of the corresponding components.

[0045] The following is combined with Figure 1-13 This application is described in further detail.

[0046] The embodiment of the present application discloses a secondary flattening device for a plastic film.

[0047] Reference Figure 1 and Figure 2 A secondary flattening device for plastic film includes a frame 1, which is provided with an entrance 11 and an exit 12. A slide 2 is arranged in the frame 1, and the slide 2 has two members, one of which is slidably connected to a first slider 21, and the other is slidably connected to a second slider 22. A replacement roller 23 is rotatably connected between the first slider 21 and the second slider 22, and a winding core can be sleeved on the replacement roller 23.

[0048] The carriage 2 is fixed with a bracket 24 near the entrance 11 of the frame 1. The bracket 24 is used to place the PVC plastic film roll that needs to be flattened for the second time. The end of the PVC plastic film roll that needs to be flattened for the second time can be wound on the core of the replacement roller 23 to prepare for the second leveling.

[0049] Reference Figure 3 and Figure 4 A hot melt fixing assembly 5 is provided at the entrance 11 of the frame 1, and the hot melt fixing assembly 5 includes a hot melt platform 51, a hot melt elastic member 52 and a hot melt roller 53; the hot melt elastic member 52 is a tension spring, one end of which is fixedly connected to the upper surface of the hot melt platform 51 and the other end is fixedly connected to the upper wall of the frame 1. There are two hot melt elastic members 52, which are closer to the two ends of the hot melt platform 51 than the middle of the hot melt platform 51, and the hot melt roller 53 is located inside the hot melt platform 51.

[0050] Reference Figure 5 The hot melt roller 53 is hidden in the hot melt table 51 by the anti-scalding component 6. Hot melt grooves 54 are provided on both sides of the frame 1. The two ends of the hot melt table 51 can slide on the hot melt grooves 54. The hot melt grooves 54 are arranged in an L-shape. The vertical position of the hot melt groove 54 is used to guide the hot melt table 51. The horizontal position of the hot melt groove 54 provides space for the hot melt table 51 to move, allowing the outlet 12 of the hot melt table 51 to align with the PVC plastic film wound on the reel core of the replacement roller 23. When the hot melt roller 53 emerges from the outlet 12 of the hot melt table 51, it can heat-melt the PVC plastic film, fixing one end of the PVC plastic film roll to the reel core, achieving hot melt fixation.

[0051] Reference Figure 5 、 Figure 6 and Figure 7The anti-scalding component 6 includes an anti-scalding shell 61, a transmission block 62 and a fixing rod 63. The two ends of the hot melt roller 53 are fixed in the anti-scalding shell 61. The inner wall of the anti-scalding shell 61 has positive and negative poles, which can be powered to heat the hot melt roller 53. The anti-scalding shell 61 can slide in the hot melt table 51, and four anti-scalding elastic members 64 are respectively provided at the two end positions of the anti-scalding shell 61. The anti-scalding elastic members 64 are tension springs. One end of the anti-scalding elastic member 64 is fixedly connected to the side wall of the anti-scalding shell 61, and the other end is fixedly connected to the inside of the hot melt table 51. The anti-scalding elastic member 64 can pull the anti-scalding shell 61 to prevent the anti-scalding shell 61 and the hot melt roller 53 from coming out from the inside of the hot melt table 51; the middle position of the transmission block 62 is rotatably connected to the inside of the hot melt table 51, one end of which extends into the side wall of the anti-scalding shell 61, and the other end is located just above the fixing rod 63. The two ends of the fixing rod 63 are fixedly arranged in the horizontal position of the hot melt groove 54. When the hot melt table 51 moves downward to work, the fixing rod 63 will press against the transmission block 62 to make the transmission block 62 rotate, and then the rotation of the transmission block 62 will push the anti-scalding shell 61, so that the anti-scalding shell 61 and the hot melt roller 53 in the anti-scalding shell 61 come out from the outlet 12 of the hot melt table 51.

[0052] Reference Figure 7 and Figure 8 The side wall of the hot melt groove 54 is provided with a limiting assembly 7, which includes a limiting slider 71 and a limiting elastic member 72. The limiting slider 71 can slide on the frame 1. In the initial state, the limiting elastic member 72 can push the limiting slider 71 so that part of the position of the limiting slider 71 is located on the hot melt groove 54. When the hot melt table 51 moves downward, it will be resisted by the limiting slider 71, thereby limiting the hot melt table 51 from continuing to move downward. At this time, since the fixing rod 63 cannot push the transmission block 62, the hot melt roller 53 cannot come out of the hot melt table 51. The limiting slider 71 is provided with a limiting slide groove 73, and the limiting slide groove 73 is also in a staggered state with the hot melt groove 54 at this time.

[0053] Reference Figure 9The bottom of the frame 1 is rotatably connected to a power rod 4, which has a first rod 45 and a second rod 46. A limited portion 41 is fixedly provided on the upper portion of the first rod 45, and a lower portion of the first rod 45 is fixedly connected to the second rod 46. The second rod 46 is provided with a linkage groove 42. A linkage rod 43 is extended from the second slider 22. The linkage rod 43 passes through the side wall of the frame 1 and extends into the linkage groove 42. The side wall of the frame 1 is also provided with a through groove 48 for the displacement of the linkage rod 43. The bottom of the second rod 46 is rotatably connected to the frame 1. The rotation position is defined as a rotation point 44. When When the assist rod 4 rotates toward the entrance 11 of the frame 1, on the one hand, the second rod 46 will use the linkage groove 42 to move the replacement roller 23 toward the entrance 11 of the frame 1. On the other hand, the limiting portion 41 on the first rod 45 can simultaneously push the limiting slider 71, so that the limiting slide 73 is aligned with the hot melt groove 54, allowing the hot melt table 51 to slide downward to hot-melt the PVC plastic film on the replacement rod; at this time, the deadweight of the assist rod 4 will force the limiting portion 41 to always abut and push the limit, so that the limiting slide 73 and the hot melt groove 54 are always aligned. In this embodiment, a handle 47 is also fixedly connected between the first rod 45 and the second rod 46, and the staff can push the handle 47 to rotate the assist rod 4. In other embodiments, a motor can also be set at the rotation point 44 to allow the assist rod 4 to rotate under the drive of the motor.

[0054] A rolling rack 232 is fixed to the carriage 2, and a rolling gear 231 is fixed to the replacement roller 23, which meshes with the rolling rack 232. Since there are two carriages 2 in this embodiment, two rolling gears 231 are also provided. When the power lever 4 rotates toward the exit 12 of the frame 1, the first and second sliders 21 and 22 drive the replacement roller 23 toward the exit 12 of the frame 1. Simultaneously, the replacement roller 23 also rotates, allowing the PVC plastic film to be wound around the winding core of the replacement roller 23.

[0055] Reference Figure 10 , an upper tensioning roller group 13 and a lower tensioning roller group 14 are slidably provided in the frame 1, the upper tensioning roller group 13 is located above the replacement roller 23, and the lower tensioning roller group 14 is located below the replacement roller 23. A transmission assembly 3 is provided between the upper tensioning roller group 13 and the lower tensioning roller group 14, and the transmission assembly 3 includes a transmission roller 31 and a transmission gear 32. The upper end of the transmission roller 31 is threadedly connected to the upper tensioning roller group 13, and the lower end of the transmission roller 31 is threadedly connected to the lower tensioning roller group 14. The threads of the two are arranged in opposite directions. When the transmission roller 31 rotates, the upper tensioning roller group 13 and the lower tensioning roller group 14 can be moved closer to or away from each other. The upper tensioning roller and the lower tensioning roller are both fixed with a stabilizing bar, and the end of the stabilizing bar can slide in the side wall of the frame 1. The transmission gear 32 is provided in the middle of the transmission roller 31, and the side wall of the first slider 21 is also provided with a transmission rack 33.

[0056] Reference Figure 10 and Figure 11When the replacement roller 23 is at the entrance 11 of the frame 1, the upper tensioning roller group 13 and the lower tensioning roller group 14 are both opened and at the farthest position, which can provide displacement space for the replacement roller 23. The end of the PVC plastic film roll is fixed to the winding core of the replacement roller 23 by the hot melt fixing component 5, and then the power-assisting rod 4 is rotated to make the replacement roller 23 move toward the outlet 12 of the frame 1. The replacement roller 23 rotates, so that the PVC plastic film is wound onto the replacement roller 23. At the same time, when the first slider 21 moves, the transmission rack 33 engages with the transmission gear 32 of the transmission roller 31, and the first slider 21 continues to move. The transmission roller 31 rotates to make the upper tensioning roller group 13 and the lower tensioning roller group 14 approach each other, and the upper tensioning roller group 13 presses the PVC plastic film downward, and the lower tensioning roller group 14 presses the PVC plastic film upward. The upper tensioning roller group 13 and the lower tensioning roller group 14 do not abut each other, but are staggered to form a wavy path 15 for the PVC plastic film to move. The upper tensioning roller group 13 and the lower tensioning roller group 14 are both provided with a heating element 16. When the upper tensioning roller group 13 and the lower tensioning roller group 14 approach each other, the heating element 16 is used to heat the PVC plastic film, thereby achieving heated tensioning.

[0057] Reference Figure 12 and Figure 13 A driving member 17 is provided at the outlet 12 of the frame 1. In this embodiment, the driving member 17 is a motor. When the replacement roller 23 moves to the outlet 12 of the frame 1, the rolling gear 231 and the rolling rack 232 on the replacement roller 23 disengage from each other and no longer engage. Then one of the rolling gears 231 engages with the driving gear 171 on the motor. The driving member 17 is started to keep the replacement rod in a rotating state, so that the PVC plastic film enters the secondary leveling working state.

[0058] The second slider 22 defines a quick-release slot 221 with its opening facing upward. One end of the replacement roller 23 is placed within the quick-release slot 221. A quick-release disc 222 is detachably mounted on the side of the quick-release slot 221. The quick-release disc 222 can be mounted on one end of the replacement roller 23. When the quick-release disc is mounted on the replacement roller 23, the replacement roller 23 cannot be removed from the quick-release slot 221. One side of the quick-release slot 221 abuts against the side wall of the frame 1, allowing the quick-release disc 222 to remain mounted on the replacement roller 23. A clearance slot 224 is provided on the side wall of the frame 1. A quick-release elastic member 223 is provided on the quick-release disc 222 to force the quick-release disc 222 to move toward the side wall of the frame 1. In this embodiment, the quick-release elastic member 223 is a spring.

[0059] When all the PVC plastic film rolls on the support 24 are flattened onto the replacement roller 23, the replacement roller 23 is pushed, and the second slider 22 moves to the position of the clearance groove 224. At this time, the quick-release elastic member 223 pushes the quick-release disc 222 into the clearance groove 224, causing the quick-release disc 222 to disengage from the replacement roller 23. The reel core that has been flattened twice on the replacement roller 23 is then removed, and a new reel core is inserted into the replacement roller 23. The replacement roller 23 is then placed back on the quick-release groove 221. The side walls of the clearance groove 224 are inclined. At this time, it is only necessary to rotate the power-assisting rod 4 to move the second slider 22. Under the thrust of the inclined side walls of the clearance groove 224, the clearance disc enters the side walls of the clearance groove 224, thereby being sleeved onto the replacement roller 23. The power-assisting frame is further rotated to allow the replacement roller 23 to move to the entrance 11 of the frame 1, and then flatten another PVC plastic film that needs to be flattened twice.

[0060] The working principle of this embodiment is as follows: When the replacement roller 23 is located at the entrance 11 of the frame 1, the PVC plastic film requiring secondary flattening on the bracket 24 is fixed to the core of the replacement roller 23 using the hot melt fixing assembly 5. Then, the auxiliary lever 4 is rotated, causing the replacement roller 23 to rotate as it moves, and the upper tensioning roller assembly 13 and the lower tensioning roller assembly 14 move closer together to tension the PVC plastic film. When the replacement roller 23 moves to the exit 12 of the frame 1, it engages with the output shaft of the drive member 17, entering the secondary flattening working state. At the end of the working state, the core of the replacement roller 23 is removed. If additional PVC plastic film requires secondary flattening, a new core is first placed on the replacement roller 23. Then, the auxiliary lever 4 is rotated to move the replacement roller 23 toward the entrance 11 of the frame 1. During this movement, the first slider 21 drives the transmission assembly 3, causing the upper tensioning roller assembly 13 and the lower tensioning roller assembly 14 to open.

[0061] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application; therefore, according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation methods. Therefore, the above specific implementation methods and drawings are only illustrative descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or restriction on the technical solution of the present invention. Therefore: All equivalent changes made in accordance with the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A plastic film secondary flattening device, comprising a frame (1), the frame (1) having an inlet (11) and an outlet (12), characterized in that: The frame (1) is movably provided with an upper tensioning roller group (13) and a lower tensioning roller group (14) of the frame (1), and slides (2) are symmetrically provided in the frame (1), wherein a first slider (21) is provided on one of the slides (2), and a second slider (22) is provided on the other slide (2), and a replacement roller (23) is rotatably provided between the first slider (21) and the second slider (22), and a transmission component (3) is provided between the upper tensioning roller group (13) and the lower tensioning roller group (14), and when the first slider (21) slides on the slide (2), the transmission component (3) can be driven to force the upper tensioning roller group (13) and the lower tensioning roller group (14) to move closer to or farther away from each other; when the replacement roller (23) moves toward the entrance (11) of the frame (1), the upper tensioning roller group (13) and the lower tensioning roller group (14) move closer to or farther away from each other. The upper tensioning roller group (13) and the lower tensioning roller group (14) are moved away from each other; when the replacement roller (23) moves toward the outlet (12) of the frame (1), the upper tensioning roller group (13) and the lower tensioning roller group (14) approach each other; when the upper tensioning roller group (13) and the lower tensioning roller group (14) approach each other, a wavy path (15) is formed between the two; the upper tensioning roller group (13) and the lower tensioning roller group (14) are both fixedly provided with a heating element (16); the side wall of the outlet (12) of the frame (1) is fixedly provided with a driving element (17) that can engage with the replacement roller (23); the second slider (22) is provided with a power rod (4); pushing the power rod (4) can force the replacement roller (23) to move toward the entrance (11) or the outlet (12) of the frame (1); the slide (2) is fixedly provided with a bracket (24) near the entrance (11) of the frame (1).

2. A plastic film secondary flattening device according to claim 1, characterized in that: The transmission assembly (3) comprises a transmission roller (31) and a transmission gear (32), wherein the transmission gear (32) is fixedly arranged in the middle of the transmission roller (31), the upper portion of the transmission roller (31) is threadedly connected to the upper tensioning roller group (13), and the lower portion of the transmission roller (31) is threadedly connected to the lower tensioning roller group (14), and the first slider (21) is fixedly provided with a transmission rack (33) that can mesh with the transmission gear (32).

3. The plastic film secondary flattening device according to claim 1, characterized in that: The slide (2) is provided with a rolling rack (232), the replacement roller (23) is fixedly provided with a rolling gear (231) that can mesh with the rolling rack (232), and the output shaft of the driving member (17) is provided with a driving gear (171); when the rolling gear (231) is disengaged from the rolling rack (232), the rolling gear (231) can mesh with the driving gear (171).

4. The plastic film secondary flattening device according to claim 1, characterized in that: The second slider (22) is provided with a quick-release slot (221), and a quick-release disc (222) is slidably provided in the quick-release slot (221) close to the side wall of the frame (1). The replacement roller (23) is mounted in the quick-release slot (221) of the second slider (22) and one end is sleeved on the quick-release disc (222); a quick-release elastic member (223) is provided between the quick-release disc (222) and the second slider (22), and a clearance slot (224) is provided on the inner side wall of the frame (1) for the quick-release disc (222) to be separated from one end of the replacement roller (23).

5. A plastic film secondary flattening device according to any one of claims 1 to 4, characterized in that: The entrance (11) of the frame (1) is provided with a hot melt fixing component (5), the hot melt fixing component (5) includes a hot melt table (51), a hot melt elastic member (52) and a hot melt roller (53) arranged in the hot melt table (51), a hot melt groove (54) is provided on the side wall of the frame (1), and both ends of the hot melt table (51) are slidably arranged in the hot melt groove (54), one end of the hot melt elastic member (52) is fixed to the upper wall of the frame (1), and the other end is fixed to the upper part of the hot melt table (51), the hot melt roller (53) can be exposed in the hot melt table (51), and the hot melt table (51) is also provided with an anti-scalding component (6) for hiding the hot melt roller (53) in the hot melt roller (53); when the hot melt roller (53) is exposed in the hot melt table (51), the hot melt roller (53) can abut against the replacement roller (23).

6. The plastic film secondary flattening device according to claim 5, characterized in that: The anti-scalding component (6) includes an anti-scalding shell (61), a transmission block (62) and a fixed rod (63); both ends of the hot melt roller (53) are fixed in the anti-scalding shell (61), the anti-scalding shell (61) can slide relative to the hot melt table (51), the side wall of the anti-scalding shell (61) is connected to the inner side wall of the hot melt table (51) through an anti-scalding elastic member (64), the transmission block (62) is rotatably arranged inside the hot melt table (51), and the transmission block One end of the (62) is inserted into the side wall of the anti-scalding shell (61), and both ends of the fixing rod (63) are fixedly arranged on the side wall of the hot melt groove (54); when the hot melt table (51) moves downward, the fixing rod (63) can push the transmission block (62) to rotate and force the anti-scalding shell (61) to move toward the opening direction of the hot melt table (51), and the side wall of the hot melt groove (54) is provided with a limit assembly (7) for limiting the downward movement of the hot melt table (51).

7. The plastic film secondary flattening device according to claim 6, characterized in that: The limiting assembly (7) comprises a limiting slide block (71) and a limiting elastic member (72) that can slide on the frame (1); the limiting slide block (71) is provided with a limiting sliding groove (73); and the limiting elastic member (72) can force the limiting sliding groove (73) and the hot melt groove (54) to be staggered with each other.

8. The plastic film secondary flattening device according to claim 7, characterized in that: The power-assisting rod (4) is fixedly provided with a limiting portion (41), the power-assisting rod (4) is provided with a linkage groove (42), the second slider (22) is extended with a linkage rod (43), and the linkage rod (43) is passed through the linkage groove (42); when the power-assisting rod (4) forces the replacement roller (23) to move toward the entrance (11) of the frame (1), the limiting portion (41) can push the limiting slider (71), forcing the limiting slide groove (73) and the hot melt groove (54) to align with each other.

9. The plastic film secondary flattening device according to claim 8, characterized in that: The lower portion of the power-assisting rod (4) cooperates with the frame (1) to form a rotation point (44); when the power-assisting rod (4) rotates toward the inlet (11) of the frame (1), the limiting portion (41) and the linkage rod (43) are closer to the inlet (11) of the frame (1) than the rotation point (44); when the power-assisting rod (4) rotates toward the outlet (12) of the frame (1), the limiting portion (41) and the linkage rod (43) are closer to the outlet (12) of the frame (1) than the rotation point (44).

10. The plastic film secondary flattening device according to claim 8, characterized in that: The power assist lever (4) comprises a first lever (45) and a second lever (46), the limiting portion (41) is fixed to the first lever (45), the linkage groove (42) is opened in the second lever (46), and a gripping rod (47) is fixed between the first lever (45) and the second lever (46).

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