A film wrapping and bundling machine
By introducing a starting end ejection and ending end clamping mechanism into the film wrapping and packaging machine, the problem of inconvenient handling of the film's starting and ending ends is solved, automated operation is achieved, and packaging efficiency and quality are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANTOU XINQISHUN MECHANICAL DESIGN CO LTD
- Filing Date
- 2026-04-29
- Publication Date
- 2026-05-26
AI Technical Summary
Existing film wrapping and bundling machines have inconvenient handling of the beginning and end of the film during packaging, which requires manual intervention and affects efficiency and quality.
A film wrapping and packaging machine was designed, comprising a starting end ejection mechanism and an ending end pressing mechanism. The machine utilizes a cylinder to drive the coordinated movement of the film pressing block, push plate, and pressure plate to achieve automatic ejection of the film at the starting end and automatic pressing at the ending end. Combined with a cutting mechanism, it achieves automatic cutting and pre-retention of the film.
It enables automated processing of the film's starting and ending points, improving packaging efficiency, reducing manual intervention, and enhancing packaging quality and continuity.
Smart Images
Figure CN224277691U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging machines, and in particular to a film wrapping and strapping packaging machine. Background Technology
[0002] In the packaging industry, rotary strapping machines are widely used for strapping various items due to their efficient rotary packaging method. To achieve continuous packaging and effectively improve efficiency, eliminating the need for manual fixing of the film's starting end to the item each time it is wrapped, some existing packaging machines can pre-leave the film's starting end. For example, a strapping packaging machine disclosed on August 12, 2025, with publication number CN223212581U, includes a frame, a packaging platform, a film wrapping mechanism, and a cutting mechanism. The packaging platform is mounted on the frame and has a wrapping channel. The lower part of the film wrapping mechanism is located in the wrapping channel and mounted on the frame. The film wrapping mechanism has a wrapping space. The characteristic feature is that the side of the wrapping channel... The machine has through holes in its wall, with strip-shaped blocks at the holes and guide grooves on the blocks. The cutting mechanism includes a film-pressing block, a cutter, and a first telescopic drive device that drives the film-pressing block to move away from or towards the cutter along the width of the winding channel. The first telescopic drive device is mounted on the frame, with its drive end passing through the through holes and resting on the guide grooves. The cutter is fixedly mounted on the strip-shaped blocks, and the cutter and the first telescopic drive device are on the same side of the winding channel. When the film-pressing block is retracted, its outer front end corresponds to the cutter, and its outer rear end is in close contact with the inner wall of the strip-shaped blocks. This strapping and packaging machine can simultaneously cut the end of the packaging film and pre-leave the beginning end of the new packaging film in a single cutting action, eliminating the need for manual pulling out and pre-fixing or wrapping the beginning end of the film onto the item each time, enabling continuous packaging. This strapping and packaging machine also includes a film blowing mechanism to assist in film detachment. However, in actual use, because the film-pressing block hooks and presses the film onto the strip-shaped block, the end of the film is squeezed into a strand and is not in a flat state. Therefore, when using the blown film mechanism, the first blown film mechanism often fails to blow the film to the end, requiring the machine to be stopped and the film to be pulled out manually. Although the second blown film mechanism can blow the film away, the blown film is still in a scattered state and cannot be wrapped around the packaged items. The end of the film needs to be pressed down on the packaged items manually, which reduces packaging efficiency and affects packaging quality and appearance. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a film wrapping and bundling packaging machine. This film wrapping and bundling packaging machine can smoothly push out the beginning end of the packaging film during packaging and press the end end of the packaging film onto the packaged items without manual labor, thus effectively improving efficiency.
[0004] To solve the above technical problems, the following technical solution is adopted:
[0005] A film wrapping and packaging machine includes a frame, a packaging platform, a film wrapping mechanism, and a cutting mechanism. The packaging platform is mounted on the frame and has a wrapping channel. The lower part of the film wrapping mechanism is located in the wrapping channel and mounted on the frame. The film wrapping mechanism has a wrapping space, and a stop block is provided on the side wall of the wrapping channel. The cutting mechanism includes a film pressing block, a cutter, and a first telescopic drive device capable of driving the film pressing block to move inward and outward along the width direction of the wrapping channel. The cutter is mounted on the frame, and the first telescopic drive device is mounted on the frame. The stop block and the first telescopic drive device are located on the same side of the wrapping channel. When the film pressing block is in a retracted state, the outer side of the film pressing block is in close contact with the inner wall of the stop block. The film is characterized in that... The wrapping and bundling machine also includes a starting end ejection mechanism and an ending end pressing mechanism. The starting end ejection mechanism includes a push plate and a second telescopic drive device that can drive the push plate to move inward and outward along the width direction of the wrapping channel. The second telescopic drive device is mounted on the frame. The push plate is located behind the pressure block. When the push plate is in a retracted state, the outer side of the push plate is in close contact with the inner wall of the stop block. The ending pressing mechanism includes a pressure plate and a swing drive device that can drive the lower part of the pressure plate to swing around the upper part. The swing drive device is mounted on the frame. The second telescopic drive device, the swing drive device, and the first telescopic drive device are located on the same side of the wrapping channel. The upper part of the pressure plate is hinged to the frame, and the pressure plate is located in front of the cutter.
[0006] In the aforementioned front-to-back direction, the direction is determined by the winding direction of the film; the position the film passes through first during winding is considered front, and the position it passes through last is considered back. In the aforementioned inside-outside direction, the position closer to the winding channel is considered inside, and the position farther from the winding channel is considered outside. The aforementioned up-and-down direction of the pressure plate refers to the relative position of the pressure plate in its retracted state.
[0007] In its initial state, the aforementioned film wrapping and packaging machine first resets the film wrapping mechanism and controls the first telescopic drive device to extend the pressure block. Then, after pulling the film out of the film wrapping mechanism, the first telescopic drive device is controlled to retract, causing the pressure block to press the starting end of the film firmly against the stop block. During use, the item to be packaged is placed on the packaging platform, positioning it in the wrapping space. The film wrapping mechanism wraps the film around the item multiple times. After one wrap and before the last wrap, the first telescopic drive device can quickly extend and retract the pressure block. When the pressure block extends, it loosens the starting end of the film. Simultaneously, the second telescopic drive device pushes out the push plate, pushing the starting end of the film outwards to prevent it from sticking to the pressure block. Subsequently, the first and second telescopic drive devices synchronously retract the pressure block and push plate together, allowing the film to be wrapped more securely during subsequent wrapping. The film is wrapped together from the beginning. During the final wrap, the first telescopic drive device extends the pressure block again, allowing the last wrap to pass over the drive end of the first telescopic drive device. After the film wrapping mechanism stops, the swing drive device drives the pressure plate to swing to a position flush with the packaging platform, pressing the end of the film firmly against the bottom of the packaged item. Then, the first telescopic drive device retracts the pressure block, which hooks the film back into place. Upon returning to the retracted state, the pressure block and the stop block together clamp the film. The cutter then cuts the film, and finally, the swing drive device re-drives the pressure plate to swing back to its original position, repeating the cycle. This film wrapping and bundling machine can cut the end of the packaged film and reserve the beginning of a new packaged film. During packaging, it can smoothly push out the beginning of the packaged film and press the end of the packaged film firmly onto the packaged item, eliminating the need for manual operation and effectively improving efficiency.
[0008] In a preferred embodiment, the cutting mechanism further includes a third telescopic drive device capable of driving the cutter to move inward and outward along the width direction of the winding channel. The third telescopic drive device is mounted on the frame, and the third telescopic drive device and the first telescopic drive device are located on the same side of the winding channel. After the pressure block retracts, the film on the cutter side is clamped by the pressure block and the stop block, while the film on the other side of the cutter is pressed against the bottom of the packaged item by the pressure plate. At this time, the cutter quickly extends under the drive of the third telescopic drive device and cuts the film. Subsequently, the third telescopic drive device quickly retracts, and the packaged item is now packaged. The swing drive device can drive the pressure plate to swing back to its original position, allowing the operator to remove the packaged item. Typically, the stop block extends from the outside of the push plate to the outside of the pressure plate, and the stop block has a notch for the drive shaft of the third telescopic drive device and the cutter to extend.
[0009] In a further preferred embodiment, the first, second, third, and swing drive devices are all cylinders. The cylinder bodies of the first, second, and third telescopic drive devices are respectively mounted on the frame, and the piston rods of the first, second, and third telescopic drive devices extend in the inward and outward directions. Each piston rod of the first, second, and third telescopic drive devices is provided with a push seat. The pressure block, push plate, and cutter are respectively mounted on the push seats of the corresponding cylinder piston rods. The cylinder body of the swing drive device is hinged to the frame, and the piston rod of the swing drive device is inclined upwards from the outside to the inside. The piston rod of the swing drive device is hinged to the lower part of the pressure plate. The pressure block, push plate, and cutter can be driven by the corresponding cylinders, thereby moving in the inward and outward directions. The lower part of the pressure plate can swing 90° around the upper hinge position under the push of the corresponding cylinder.
[0010] In a preferred embodiment, the film winding mechanism includes a ring frame, a winding ring, a rotation drive device capable of driving the winding ring to rotate, a film unwinding shaft, a pressing device, and a tensioning device. The ring frame is fixedly mounted on the machine frame, and its lower part is located in the winding channel. The winding ring is rotatably mounted on the ring frame, and the space enclosed by the winding ring constitutes the winding space. The film unwinding shaft is rotatably mounted on the winding ring. A film roll replacement window is provided on the ring frame. The pressing device and the tensioning device are located on the winding ring. The film unwinding shaft releases the film, and the rotation drive device drives the winding ring to rotate around its axis, thereby winding the film around the item one loop at a time. When it is necessary to replace the film roll, the used film roll can be retrieved through the film roll replacement window, and a new film roll can be fixedly placed on the film unwinding shaft. The pressing device can adhere tightly to the surface of the film roll, and the tensioning device can tighten the released film. Through the combined action of the pressing device and the tensioning device, the film can maintain tension.
[0011] In a further preferred embodiment, the film winding mechanism further includes a counterweight and a reset sensor. The counterweight is fixedly mounted on the winding ring, and its position corresponds to that of the film unwinding shaft along the circumference of the winding ring, with the counterweight protruding from the edge of the winding ring. The reset sensor is mounted on the ring frame, with its detection end facing the winding space. When the counterweight rotates to the position corresponding to the reset sensor, the sensing end of the reset sensor aligns with the counterweight. The signal output end of the reset sensor is electrically connected to the signal input end of the rotation drive device. Typically, the film winding and bundling packaging machine also includes a control device that controls the operation of each device. The signal output end of the reset sensor is electrically connected to the corresponding signal input end of the control device, and the corresponding signal output end of the control device is electrically connected to the signal input end of the rotation drive device. In the initial state of the packaging machine, when the winding ring needs to be reset and the film roll placed, the rotary drive device drives the winding ring to pre-rotate. When the counterweight rotates with the winding ring and passes the reset sensor, and is detected by the reset sensor, the reset sensor sends a signal to the control device. The control device then controls the rotary drive device to stop driving. At this time, the film unwinding shaft is positioned precisely at the film roll changing window, allowing the operator to change the film roll. Similarly, because the winding ring is relatively large, and one side of the winding ring is equipped with a film unwinding shaft, a pressing device, and a tensioning device, the counterweight also serves as a counterweight, maintaining dynamic balance of the winding ring during rapid rotation.
[0012] In a further preferred embodiment, the reset sensor is a proximity switch sensor. Other sensors, such as photoelectric switches, can also be used as the reset sensor.
[0013] In a further preferred embodiment, the clamping device includes a clamping roller and a pressure applying mechanism that allows the clamping roller to approach the film unwinding shaft. The pressure applying mechanism is disposed on the winding ring. The clamping roller includes a contact roller, a fixed shaft, a clamping pad, a compression spring, an adjusting nut, and at least one bearing. The contact roller is positioned to match and parallel to the film unwinding shaft. The contact roller has an axially extending through hole, and an annular step is provided at the middle position of the through hole. The fixed shaft includes an outer adjusting section and an inner mounting section. The inner end of the outer adjusting section is connected to the outer end of the inner mounting section, and the diameter of the inner mounting section is larger than the inner diameter of the annular step. The inner diameter of the annular step is larger than the diameter of the outer adjusting section. The fixed shaft passes through the through hole from the inside to the outside, and the outer adjusting section extends from the annular step to the outside of the contact roller. A clamping washer and a compression spring are sequentially fitted onto the outer adjusting section, with the clamping washer in contact with the annular step. The side wall of the outer adjusting section has an external thread matching the adjusting nut, which is threadedly connected to the outer adjusting section. One end of the compression spring is in close contact with the clamping washer, and the other end is in close contact with the adjusting nut. The inner mounting section is mounted on the pressure mechanism, and its side wall is connected to the inner wall of the through hole via a bearing. When the membrane roll is unloaded, the contact roller on the clamping roller presses against the membrane roll and rotates as the film is fed out. To ensure the film remains tight and secure when pulled out, the damping of the contact roller can be adjusted. Specifically, tightening the adjusting nut compresses the compression spring, increasing its pressure on the pressure washer. This increases the pressure of the pressure washer on the annular step, thereby increasing the friction between the contact roller and the pressure washer. This increases the damping of the contact roller, making it less likely for the film to pull the roller out, ensuring the unwound film stays in place and improving the tightness of the packaged items. Conversely, loosening the adjusting nut reduces the damping of the contact roller.
[0014] In a further preferred embodiment, the clamping roller also includes a cover plate, which is fixedly installed on the outer end of the contact roller, and the inner end of the cover plate is provided with an annular protrusion, the diameter of which is larger than that of the contact roller; the cover plate has a through hole corresponding to the through hole, and the adjusting nut, the outer adjusting section, and part of the compression spring are located in the through hole and covered by the cover plate.
[0015] In a further preferred embodiment, the pressure applying mechanism includes a swing arm and a tension spring. The middle part of the swing arm is rotatably mounted on the winding ring via a pin. The inner mounting section of the fixed shaft is fixedly mounted on one end of the swing arm. One end of the tension spring is connected to the other end of the swing arm, and the other end of the tension spring is connected to the winding ring. Under the action of the tension spring, the swing arm ensures that the contact roller remains in close contact with the surface of the film roll during the unwinding process.
[0016] The specific structure of the aforementioned tensioning device and rotation drive device can adopt a conventional structure, such as the same structure as the tensioning device in patent CN223212581U.
[0017] Typically, film wrapping and packaging machines also include the same article clamping mechanism, limit plate, foot pedal, and triggering mechanism as those in patent CN223212581U.
[0018] The beneficial effects of this utility model are as follows: This film wrapping and bundling packaging machine can smoothly push out the beginning end of the packaging film during packaging and press the end end of the packaging film onto the packaged items without manual labor, thus effectively improving efficiency. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the film wrapping and packaging machine in an embodiment of this utility model;
[0020] Figure 2 This is a schematic diagram of the cutting mechanism, the starting end ejection mechanism, and the ending end clamping mechanism in an embodiment of this utility model;
[0021] Figure 3 This is a schematic diagram of the cutting mechanism, the starting end ejection mechanism, and the ending end pressing mechanism from another angle in an embodiment of this utility model;
[0022] Figure 4 This is a schematic diagram of the film winding mechanism in an embodiment of the present invention;
[0023] Figure 5 This is a schematic diagram of the structure of the pressure wheel in an embodiment of this utility model;
[0024] Figure 6 This is a cross-sectional view of the pressure wheel in an embodiment of this utility model. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:
[0026] like Figure 1-6The illustrated film wrapping and packaging machine includes a frame 1, a packaging platform 2, a film wrapping mechanism 3, a cutting mechanism 4, a starting end ejection mechanism 5, and an ending end pressing mechanism 6. The packaging platform 2 is mounted on the frame 1 and has a wrapping channel 201. The lower part of the film wrapping mechanism 3 is located in the wrapping channel 201 and mounted on the frame 1. The film wrapping mechanism 3 has a wrapping space 7, and a stop block 2011 is provided on the side wall of the wrapping channel 201. The cutting mechanism 4 includes a film pressing block 401, a cutter 402, and a first telescopic drive device 403 capable of driving the film pressing block 401 to move inward and outward along the width direction of the wrapping channel 201. The cutter 402 is mounted on the frame 1, and the first telescopic drive device 403 is mounted on the frame 1. The stop block 2011 and the first telescopic drive device 403 are located on the same side of the wrapping channel 201. When the film pressing block 401 is in the retracted state, the film is pressed... The outer side of block 401 is in close contact with the inner wall of stop block 2011; the starting end ejection mechanism 5 includes a push plate 501 and a second telescopic drive device 502 that can drive the push plate 501 to move inward and outward along the width direction of the winding channel 201. The second telescopic drive device 502 is mounted on the frame 1. The push plate 501 is located behind the pressure block 401. When the push plate 501 is in a retracted state, the outer side of the push plate 501 is in close contact with the inner wall of stop block 2011; the end pressing mechanism 6 includes a pressure plate 601 and a swing drive device 602 that can drive the lower part of the pressure plate 601 to swing around the upper part. The swing drive device 602 is mounted on the frame 1. The second telescopic drive device 502, the swing drive device 602 and the first telescopic drive device 403 are located on the same side of the winding channel 201. The upper part of the pressure plate 601 is hinged to the frame 1, and the pressure plate 601 is located in front of the cutter 402.
[0027] In the aforementioned front-to-back direction, the direction is determined by the winding direction of the film. The position the film passes through first during winding is the front, and the position it passes through last is the back. In the aforementioned inside-outside direction, the position closer to the winding channel 201 is the inside, and the position farther from the winding channel 201 is the outside. The aforementioned up-down direction of the pressure plate 601 refers to the relative position of the pressure plate 601 in its retracted state.
[0028] In the initial state, the above-mentioned film wrapping and packaging machine first resets the film wrapping mechanism 3 and controls the first telescopic drive device 403 to drive the film pressing block 401 to extend. Then, after the film is pulled out from the film wrapping mechanism 3, the first telescopic drive device 403 is controlled to retract, so that the film pressing block 401 presses the starting end of the film onto the stop block 2011. In use, the item to be packaged is placed on the packaging platform 2, so that the item is in the winding space 7. At this time, the film winding mechanism 3 wraps the film around the item in multiple turns. After the film is wound once and before the last turn, the first telescopic drive device 403 can drive the pressure block 401 to quickly extend and retract once. When the pressure block 401 extends, it can loosen the starting end of the film. At the same time, the second telescopic drive device 502 drives the push plate 501 to push out, pushing the starting end of the film outward to prevent the starting end of the film from sticking to the pressure block 401. Then, the first telescopic drive device 403 and the second telescopic drive device 502 synchronously drive the pressure block 401 and the push plate 501 to retract together. During subsequent film winding, the starting end of the film can be retracted. The film is wrapped together from the beginning; during the last wrap, the first telescopic drive device 403 drives the pressure block 401 to extend again, so that the last wrap passes through the drive end of the first telescopic drive device 403 after wrapping; after the film wrapping mechanism 3 stops wrapping the film, the swing drive device 602 drives the pressure plate 601 to swing to a position flush with the packaging platform 2, pressing the end of the film firmly against the bottom of the packaged item; then the first telescopic drive device 403 drives the pressure block 401 to retract, at which time the pressure block 401 hooks the film and retracts, and when it returns to the retracted state, the pressure block 401 and the stop block 2011 together clamp the film; then the cutter 402 cuts the film, and finally the swing drive device 602 drives the pressure plate 601 to swing back to its original position, and so on. This film wrapping and packaging machine can cut off the end of the packaging film and reserve the beginning of the new packaging film. During packaging, it can also smoothly push out the beginning of the packaging film and press the end of the packaging film onto the packaged item without the need for additional manual operation, thus effectively improving efficiency.
[0029] The cutting mechanism 4 also includes a third telescopic drive device 404 capable of driving the cutter 402 to move inward and outward along the width direction of the winding channel 201. The third telescopic drive device 404 is mounted on the frame 1, and the third telescopic drive device 404 and the first telescopic drive device 403 are located on the same side of the winding channel 201. After the film pressing block 401 retracts, the film on one side of the cutter 402 is clamped by the film pressing block 401 and the stop block 2011, while the film on the other side of the cutter 402 is pressed tightly against the bottom of the packaged item by the pressure plate 601. At this time, the cutter 402 is quickly extended under the drive of the third telescopic drive device 404 and cuts the film. Then the third telescopic drive device 404 quickly retracts, and the packaged item is packaged. The swing drive device 602 can drive the pressure plate 601 to swing back to its original position, and the staff can remove the packaged item. Typically, the stop 2011 extends from the outside of the push plate 501 to the outside of the pressure plate 601, and the stop 2011 has a notch for the drive shaft of the third telescopic drive device 404 and the cutter 402 to extend out.
[0030] The first telescopic drive device 403, the second telescopic drive device 502, the third telescopic drive device 404, and the swing drive device 602 all use cylinders. The cylinder bodies of the first telescopic drive device 403, the second telescopic drive device 502, and the third telescopic drive device 404 are respectively mounted on the frame 1, and the piston rods of the first telescopic drive device 403, the second telescopic drive device 502, and the third telescopic drive device 404 extend in the inward and outward directions. The piston rods of the first telescopic drive device 403, the second telescopic drive device 502, and the third telescopic drive device 404 are respectively provided with push seats. The pressure block 401, the push plate 501, and the cutter 402 are respectively mounted on the push seats of the corresponding cylinder piston rods. The cylinder body of the swing drive device 602 is hinged to the frame 1, and the piston rod of the swing drive device 602 is inclined upward from the outside to the inside. The piston rod of the swing drive device 602 is hinged to the lower part of the pressure plate 601. The pressing block 401, the push plate 501 and the cutter 402 can be driven by corresponding cylinders to move in the inward and outward directions; the lower part of the pressing plate 601 can swing 90° around the upper hinge position under the push of the corresponding cylinder.
[0031] The film winding mechanism 3 includes a ring frame 301, a winding ring 302, a rotation drive device 303 capable of driving the winding ring 302 to rotate, a film unwinding shaft 304, a pressing device 305, and a tensioning device 306. The ring frame 301 is fixedly mounted on the frame 1, and the lower part of the ring frame 301 is located in the winding channel 201. The winding ring 302 is rotatably mounted on the ring frame 301, and the space enclosed by the winding ring 302 constitutes the winding space 7. The film unwinding shaft 304 is rotatably mounted on the winding ring 302. A film roll replacement window 3011 is opened on the ring frame 301. The pressing device 305 and the tensioning device 306 are arranged on the winding ring 302. The film unwinding shaft 304 releases the film, and the rotation drive device 303 drives the winding ring 302 to rotate around its axis, thereby winding the film around the item one turn at a time. When it is necessary to replace the membrane roll, the used membrane roll can be taken away through the membrane roll replacement window 3011, and the new membrane roll can be fixedly placed on the membrane unwinding shaft 304. The clamping device 305 can be pressed tightly against the surface of the membrane roll, and the tensioning device 306 can tension the released membrane. Through the combined action of the clamping device 305 and the tensioning device 306, the membrane can maintain tension.
[0032] The film winding mechanism 3 also includes a counterweight 307 and a reset sensor 308. The counterweight 307 is fixedly mounted on the winding ring 302, and its position corresponds to that of the film unwinding shaft 304 along the circumference of the winding ring 302, with the counterweight 307 protruding from the edge of the winding ring 302. The reset sensor 308 is mounted on the ring frame 301, with its detection end facing the winding space 7. When the counterweight 307 rotates to the corresponding position of the reset sensor 308, the sensing end of the reset sensor 308 aligns with the counterweight 307. The signal output end of the reset sensor 308 is electrically connected to the signal input end of the rotation drive device 303. The film winding and bundling packaging machine also includes a control device (not shown in the figure) that controls the operation of each device. The signal output end of the reset sensor 308 is electrically connected to the corresponding signal input end of the control device, and the corresponding signal output end of the control device is electrically connected to the signal input end of the rotation drive device 303. In the initial state of the packaging machine, when the winding ring 302 needs to be reset and the film roll placed, the rotation drive device 303 drives the winding ring 302 to pre-rotate. When the counterweight 307 rotates with the winding ring 302 and passes the reset sensor 308, and is detected by the reset sensor 308, the reset sensor 308 sends a signal to the control device. The control device controls the rotation drive device 303 to stop driving. At this time, the film unwinding shaft 304 is exactly in the position of the film roll replacement window 3011, and the operator can replace the film roll. Similarly, because the winding ring 302 is relatively large, and one side of the winding ring 302 is equipped with the film unwinding shaft 304, the pressing device 305, and the tensioning device 306, the counterweight 307 can also play a counterweight role, so that the winding ring 302 maintains dynamic balance when rotating rapidly.
[0033] The reset sensor 308 is a proximity switch sensor.
[0034] The clamping device 305 includes a clamping roller 3051 and a pressure applying mechanism 3052 that allows the clamping roller 3051 to approach the film unwinding shaft 304. The pressure applying mechanism 3052 is mounted on the winding ring 302. The clamping roller 3051 includes a contact roller 30511, a fixed shaft 30512, a clamping pad 30513, a compression spring 30514, an adjusting nut 30515, and two bearings 30516. The contact roller 30511 is positioned to match and parallel to the film unwinding shaft 304. The contact roller 30511 has an axially extending through hole 305111, and an annular step 305112 is provided at the middle position of the through hole 305111. The fixed shaft 30512 includes an outer adjusting section 305121 and an inner mounting section 305122. The inner end of the outer adjusting section 305121 is connected to the outer end of the inner mounting section 305122, and the diameter of the inner mounting section 305122 is larger than the inner diameter of the annular step 305112. The diameter of the outer adjusting section 305121 is such that the fixed shaft 30512 passes through the through hole 305111 from the inside to the outside, and the outer adjusting section 305121 extends from the annular step 305112 to the outside of the contact roller 30511. A clamping washer 30513 and a compression spring 30514 are sequentially sleeved on the outer adjusting section 305121, and the clamping washer 30513 contacts the annular step 305112. An adjustment screw is provided on the side wall of the outer adjusting section 305121. The female 30515 is matched with an external thread 3051211. The adjusting nut 30515 is threadedly connected to the outer adjusting section 305121. One end of the compression spring 30514 is in close contact with the pressure washer 30513, and the other end of the compression spring 30514 is in close contact with the adjusting nut 30515. The inner mounting section 305122 is set on the pressure applying mechanism 3052, and the side wall of the inner mounting section 305122 is connected to the inner wall of the through hole 305111 through the bearing 30516. When the film roll is unloaded, the contact roller 30511 on the pressure roller 3051 can press against the film roll and can rotate with the film as it is fed out. To ensure the film remains tight and secure when pulled out, the damping of the contact roller 30511 during rotation can be adjusted. Specifically, tightening the adjusting nut 30515 compresses the compression spring 30514, increasing its pressure on the pressure washer 30513. This, in turn, increases the pressure of the pressure washer 30513 on the annular step 305112, thereby increasing the friction between the contact roller 30511 and the pressure washer 30513. This increases the damping of the contact roller 30511 during rotation, making it less likely for the film to cause the contact roller 30511 to rotate and be released, ensuring the unwound film remains secure and improving the tightness of the packaged items. Conversely, loosening the adjusting nut 30515 reduces the damping of the contact roller 30511 during rotation.
[0035] The pressure applying mechanism 3052 includes a swing arm 30521 and a tension spring 30522. The middle part of the swing arm 30521 is rotatably mounted on the winding ring 302 via a pin. The inner mounting section 305122 of the fixed shaft 30512 is fixedly mounted on one end of the swing arm 30521. One end of the tension spring 30522 is connected to the other end of the swing arm 30521, and the other end of the tension spring 30522 is connected to the winding ring 302. Under the action of the tension spring 30522, the swing arm 30521 can keep the contact roller 30511 in close contact with the surface of the film roll during the unwinding process.
[0036] The clamping roller 3051 also includes a cover plate 30517, which is fixedly installed on the outer end of the contact roller 30511. The inner end of the cover plate 30517 is provided with an annular protrusion 305171, the diameter of which is larger than that of the contact roller 30511. The cover plate 30517 has a through hole corresponding to the through hole 305111. The adjusting nut 30515, the outer adjusting section 305121, and a part of the compression spring 30514 are located in the through hole and covered by the cover plate 30517.
[0037] The specific structure of the tensioning device 306 and the rotation drive device 303 mentioned above adopts the same structure as the tensioning device 306 in patent CN223212581U.
[0038] The film wrapping and packaging machine also includes the same article clamping mechanism 8, limiting plate 9, foot pedal 10 and triggering mechanism (not visible in the figure) as in patent CN223212581U.
Claims
1. A film wrapping and packaging machine, comprising a frame, a packaging platform, a film wrapping mechanism, and a cutting mechanism, wherein the packaging platform is mounted on the frame, a wrapping channel is formed on the packaging platform, the lower part of the film wrapping mechanism is located in the wrapping channel and mounted on the frame, the film wrapping mechanism has a wrapping space, and a stop block is provided on the side wall of the wrapping channel; the cutting mechanism comprises a film pressing block, a cutter, and a first telescopic drive device capable of driving the film pressing block to move inward and outward along the width direction of the wrapping channel, the cutter is mounted on the frame, the first telescopic drive device is mounted on the frame, and the stop block and the first telescopic drive device are located on the same side of the wrapping channel; the film pressing block is in a retracted state, and the outer side of the film pressing block is in close contact with the inner wall of the stop block; characterized in that: The film wrapping and packaging machine further includes a starting end ejection mechanism and an end pressing mechanism. The starting end ejection mechanism includes a push plate and a second telescopic drive device capable of driving the push plate to move inward and outward along the width direction of the wrapping channel. The second telescopic drive device is mounted on the frame. The push plate is located behind the film pressing block. When the push plate is in a retracted state, the outer side of the push plate is in close contact with the inner wall of the stop block. The end pressing mechanism includes a pressure plate and a swing drive device capable of driving the lower part of the pressure plate to swing around the upper part. The swing drive device is mounted on the frame. The second telescopic drive device, the swing drive device, and the first telescopic drive device are located on the same side of the wrapping channel. The upper part of the pressure plate is hinged to the frame, and the pressure plate is located in front of the cutter.
2. The film wrapping and packaging machine as described in claim 1, characterized in that: The cutting mechanism further includes a third telescopic drive device capable of driving the cutter to move inward and outward along the width direction of the winding channel. The third telescopic drive device is mounted on the frame, and the third telescopic drive device and the first telescopic drive device are located on the same side of the winding channel.
3. The film wrapping and packaging machine as described in claim 2, characterized in that: The first, second, third, and swing drive devices all employ cylinders. The cylinder bodies of the first, second, and third telescopic drive devices are respectively mounted on the frame, and the piston rods of the first, second, and third telescopic drive devices extend inward and outward. Each piston rod of the first, second, and third telescopic drive devices is provided with a push seat. The pressure block, push plate, and cutter are respectively mounted on the push seats of the corresponding cylinder piston rods. The cylinder body of the swing drive device is hinged to the frame, and the piston rod of the swing drive device is inclined upward from the outside to the inside. The piston rod of the swing drive device is hinged to the lower part of the pressure plate.
4. The film wrapping and packaging machine as described in claim 1, characterized in that: The film winding mechanism includes a ring frame, a winding ring, a rotation drive device capable of driving the winding ring to rotate, a film unwinding shaft, a pressing device, and a tensioning device. The ring frame is fixedly installed on the machine frame, and the lower part of the ring frame is located in the winding channel. The winding ring is rotatably mounted on the ring frame, and the space enclosed by the winding ring constitutes the winding space. The film unwinding shaft is rotatably mounted on the winding ring. The ring frame has a film roll replacement window. The pressing device and the tensioning device are mounted on the winding ring.
5. A film wrapping and packaging machine as described in claim 4, characterized in that: The film winding mechanism further includes a counterweight and a reset sensor. The counterweight is fixedly mounted on the winding ring and corresponds to the position of the film unwinding shaft along the circumference of the winding ring, with the counterweight protruding from the edge of the winding ring. The reset sensor is mounted on the ring frame, with its detection end facing the winding space. When the counterweight rotates to the position corresponding to the reset sensor, the sensing end of the reset sensor aligns with the counterweight. The signal output end of the reset sensor is electrically connected to the signal input end of the rotation drive device.
6. A film wrapping and bundling packaging machine as described in claim 5, characterized in that: The reset sensor is a proximity switch sensor.
7. A film wrapping and packaging machine as described in claim 4, characterized in that: The clamping device includes a clamping roller and a pressure applying mechanism that allows the clamping roller to approach the film unwinding shaft. The pressure applying mechanism is disposed on the winding ring. The clamping roller includes a contact roller, a fixed shaft, a clamping pad, a compression spring, an adjusting nut, and at least one bearing. The contact roller is positioned to match and parallel to the film unwinding shaft. The contact roller has an axially extending through hole, and an annular step is provided in the middle of the through hole. The fixed shaft includes an outer adjusting section and an inner mounting section. The inner end of the outer adjusting section is connected to the outer end of the inner mounting section, and the diameter of the inner mounting section is larger than the inner diameter of the annular step. The inner diameter of the step is larger than the diameter of the outer adjusting section. The fixed shaft passes through the through hole from the inside to the outside, and the outer adjusting section extends from the annular step to the outside of the contact roller. The clamping shim and the compression spring are sequentially sleeved on the outer adjusting section, and the clamping shim contacts the annular step. The side wall of the outer adjusting section has an external thread that matches the adjusting nut. The adjusting nut is threadedly connected to the outer adjusting section. One end of the compression spring is in close contact with the clamping shim, and the other end of the compression spring is in close contact with the adjusting nut. The inner mounting section is set on the pressure applying mechanism, and the side wall of the inner mounting section is connected to the inner wall of the through hole through a bearing.
8. A film wrapping and packaging machine as described in claim 7, characterized in that: The clamping roller also includes a cover plate, which is fixedly installed on the outer end of the contact roller. The inner end of the cover plate is provided with an annular protrusion, the diameter of which is larger than that of the contact roller. The cover plate has a through hole corresponding to the through hole. The adjusting nut, the outer adjusting section, and part of the compression spring are located in the through hole and covered by the cover plate.
9. A film wrapping and packaging machine as described in claim 7, characterized in that: The pressure-applying mechanism includes a swing arm and a tension spring. The middle part of the swing arm is rotatably mounted on the winding ring via a pin. The inner mounting section of the fixed shaft is fixedly mounted on one end of the swing arm. One end of the tension spring is connected to the other end of the swing arm, and the other end of the tension spring is connected to the winding ring.