Automatic winding and unwinding device for M-fold flexible freight bag

Abstract

The invention discloses an automatic winding and unwinding device for M-fold flexible freight bags, which relates to the field of flexible freight bag production equipment and comprises a bottom plate, a rack, a deviation rectifying assembly, a guide roller assembly, a winding assembly, an unwinding assembly, a driving assembly and a control panel. The rack is slidably connected to the top of the bottom plate through the deviation rectifying assembly, and the deviation rectifying assembly comprises a hydraulic telescopic rod and a linear sliding rail and is used for driving the whole machine to transversely move so as to achieve automatic alignment. The guide roller assembly, the winding assembly and the unwinding assembly are sequentially installed on the machine frame in the material conveying direction and are synchronously driven by a motor and a chain system in the same driving assembly. The winding assembly comprises a sand blasting roller capable of being adjusted front and back, a mirror surface roller and a chain pressing mechanism, and the pressing mechanism provides constant pressure changing in a self-adaptive mode along with the diameter of a cloth roll through an elastic element. The unwinding assembly is provided with a turnover lifting arc-shaped plate. The problems that alignment is difficult, winding is not solid, discharging is not safe and the like are solved, and efficient and high-quality automatic winding and unwinding operation is achieved.

Description

Technical Field

[0001] This invention relates to the field of container bag production equipment, and more particularly to an automatic unwinding and rewinding device for M-fold container bags. Background Technology

[0002] In the production of FIBCs (Flexible Intermediate Bulk Containers), the winding of the woven fabric tubes and inner lining film is a crucial subsequent process. Currently, factories generally use a combination of a winding machine and an unwinding frame to complete this operation. The basic process involves using guide rollers to pull the material and using rotating rollers to wind the finished fabric into neat rolls for easy storage and transportation.

[0003] However, existing winding devices still have several obvious shortcomings in practical applications. First, when there is a misalignment between the device and the output position of the upstream circular loom, operators usually need to manually push the entire heavy frame for fine-tuning, which is not only labor-intensive and has low alignment accuracy, but also poses safety hazards. Second, during the winding process, as the diameter of the fabric roll increases, the lack of an effective adaptive clamping mechanism can easily lead to loose winding, loosening, or interlayer slippage, affecting the winding quality. At the same time, the fixed spacing between the winding rollers makes it difficult to adapt to different roll diameters required by different processes, easily causing interference. Furthermore, during unloading, the heavy fabric roll often falls directly or relies on manual prying, which can easily cause damage to the fabric roll, scattering of materials, and even safety accidents. Moreover, during roll change preparation, the storage of auxiliary parts such as iron pipes is messy, affecting the continuity of operations.

[0004] Therefore, how to develop an automatic unwinding and rewinding device for M-fold container bags that can achieve automatic and precise alignment of the frame, provide stable and adaptive downward pressure during the winding process and automatically accommodate the increased roll diameter, and ultimately achieve smooth and controllable unloading of the cloth roll and efficient operation cycle has become a technical problem that urgently needs to be solved by people in this field. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic unwinding and rewinding device for M-fold container bags, which can achieve automatic and precise alignment of the frame, provide stable and adaptive downward pressure during the winding process and automatically accommodate the increased roll diameter, and ultimately achieve smooth and controllable unloading of the cloth roll and efficient operation cycle.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: This invention discloses an automatic winding and unwinding device for M-fold container bags, comprising a base plate, a frame, a web guiding assembly, a guide roller assembly, a winding assembly, an unwinding assembly, a drive assembly, and a control panel. The frame is slidably connected to the top of the base plate via the web guiding assembly, which drives the frame to slide in a direction perpendicular to the material conveying direction. The guide roller assembly is installed on the side of the frame near the feed end. The winding and unwinding assemblies are sequentially arranged on the frame along the material conveying direction. The drive assembly is installed on the frame and drives the guide roller assembly, winding assembly, and unwinding assembly. The control panel is installed on one side of the frame, and the web guiding assembly, winding assembly, unwinding assembly, and drive assembly are all electrically connected to the control panel.

[0007] Preferably, the frame includes side plates, support rods, and a top plate. Two side plates are arranged opposite to each other, at least two support rods are horizontally fixedly connected between the two side plates, and the top plate is fixedly connected to the top of the two side plates.

[0008] Preferably, the correction assembly includes linear slide rails, sliders, correction base plate and a first hydraulic telescopic rod. Two linear slide rails are fixed parallel to each other on the top of the base plate. Four sliders are respectively fixed to the bottom of two side plates of the frame and slidably connected to the linear slide rails. The correction base plate is fixedly connected to the base plate. One end of the first hydraulic telescopic rod is hinged to the correction base plate and the other end of the first hydraulic telescopic rod is hinged to the side plate.

[0009] Preferably, the guide roller assembly includes guide roller shafts, guide roller bodies, and a first driven sprocket. Multiple guide roller shafts are rotatably connected in parallel between the two side plates and are arranged at intervals along the material conveying direction. The guide roller bodies, which are fixedly sleeved on each guide roller shaft, are staggered in the vertical direction. The end of at least one guide roller shaft is fixedly connected to the first driven sprocket, and the first driven sprocket is connected to the drive assembly via a chain.

[0010] Preferably, the winding assembly includes a sandblasting roller assembly, a mirror roller, a chain pressing assembly, and a magnetic powder brake. The sandblasting roller assembly is slidably connected to the side plate along the material conveying direction. The mirror roller is rotatably connected to the side plate and located downstream of the sandblasting roller assembly. The chain pressing assembly is used to press the material located above the sandblasting roller assembly and the mirror roller. The sandblasting roller assembly includes a sandblasting roller body, a second driven sprocket, a bearing slide, a bearing square seat, and a second hydraulic telescopic rod. Two bearing slides are fixedly fixed to the side plate at a vertical distance. The bearing square seat is slidably connected between the two bearing slides. The sandblasting roller body is rotatably supported in the bearing square seat by bearings. One end of the sandblasting roller body is fixedly connected to the second driven sprocket. One end of the second hydraulic telescopic rod is fixedly connected to the side plate, and the other end is fixedly connected to the bearing square seat. One end of the mirror roller is rotatably connected to the side plate by bearings and extends outward. The extended end of the mirror roller is coaxially connected to the output shaft of the magnetic powder brake. A third driven sprocket is fixedly connected to the mirror roller. The third driven sprocket is connected to the drive assembly via a chain. The magnetic powder brake is electrically connected to the control panel.

[0011] Preferably, the chain pressing assembly includes a vertical plate, a second linear slide rail, a chain slide member, a pressure plate, a chain drive mechanism, lead screws, springs, and rollers. Two vertical plates are symmetrically fixedly connected to two side plates. The second linear slide rail is vertically fixedly connected to the inner side of the vertical plate. The chain slide member is slidably connected to the second linear slide rail via a first slider and is fixedly connected to the chain of the chain drive mechanism. The pressure plate is slidably connected to the second linear slide rail via a second slider and is located below the chain slide member. The lower ends of the two lead screws are fixedly connected to the pressure plate. The upper ends of the lead screws pass through the chain slide member and are limited by nuts. The springs are sleeved on each lead screw, and their two ends abut against the chain slide member and the pressure plate, respectively. Two rollers are rotatably connected to the bottom of the pressure plate and are used to press down and contact the iron pipe placed on the sandblasting roller body and the mirror roller during the winding operation. The iron pipe is used for winding the conveyed tubular fabric to form a fabric roll.

[0012] Preferably, the chain drive mechanism includes a transition sprocket, a first chain, and a hydraulic motor. The two transition sprockets are rotatably connected to the top and bottom of the inner cavity of the vertical plate, respectively. The first chain is tensioned and wrapped around the two transition sprockets. The hydraulic motor is driven by one of the transition sprockets. One end of the chain slide passes through the cavity wall of the vertical plate and is fixedly connected to the first chain. The vertical plate has a groove for the chain slide to slide up and down. Limit switches are installed at the top and bottom of the inner cavity of the vertical plate to detect the position of the chain slide. The limit switches are electrically connected to the control panel.

[0013] Preferably, the unwinding assembly includes lifting arms, lifting arc plates, and third hydraulic telescopic rods. The two lifting arms are rotatably connected to both ends of the mirror roller and can rotate around the axis of the mirror roller. The lifting arc plates are fixedly connected between the two lifting arms. The two third hydraulic telescopic rods are respectively disposed on the outer sides of the two lifting arms. One end of the third hydraulic telescopic rod is hinged to the side plate, and the other end is hinged to the corresponding lifting arm. The unwinding assembly is also provided with a pusher telescopic rod, which is installed on the side plate and its extension direction is perpendicular to the axis of the sandblasting roller body and the mirror roller. A push plate is connected to one end of the pusher telescopic rod facing the lifting arc plate, which is used to push the cloth roll to move towards the lifting arc plate during unloading. The pusher telescopic rod is electrically connected to the control panel.

[0014] Preferably, the drive assembly includes a drive motor, a hydraulic station, a drive sprocket, and a tensioning wheel. The drive motor and the hydraulic station are both mounted on the side plate of the frame. The output shaft of the drive motor passes through the side plate and is fixedly connected to the drive sprocket. The drive sprocket is connected to the first driven sprocket, the second driven sprocket, and the third driven sprocket via a second chain. The tensioning wheel is rotatably connected to the frame and presses against the second chain. The hydraulic station is connected to the hydraulic motors of the first hydraulic telescopic rod, the second hydraulic telescopic rod, the third hydraulic telescopic rod, and the chain drive mechanism via hydraulic pipelines. Both the drive motor and the hydraulic station are electrically connected to the control panel.

[0015] Preferably, the rear of the frame is also fixed with a storage rack for storing spare iron pipes.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows: 1) This invention sets up a correction assembly consisting of a linear slide rail, a slider, and a first hydraulic telescopic rod, and slides the entire frame onto the base plate. This allows the operator to control the lateral movement of the frame with one click through the control panel, enabling the device to be quickly and accurately aligned with the upstream production line. This completely avoids the heavy labor and safety risks of manually pushing the heavy frame. At the same time, the control panel provides centralized electrical control of the drive motor, hydraulic station, and various hydraulic actuators, enabling multiple processes such as correction, winding, and unloading to be automatically connected and linked according to a predetermined program, significantly improving the continuity of the production process and the overall operating efficiency. 2) The coordination between the chain pressing mechanism and the adjustable position mechanism of the sandblasting roller in the winding assembly effectively ensures the winding quality. The chain pressing mechanism uses a hydraulic motor to drive the chain slide for coarse positioning, and utilizes an elastic mechanism composed of springs and lead screws to provide continuous and adaptive constant pressure that adapts to the increase in the fabric roll diameter, ensuring the tightness of the winding and preventing loosening and collapse. At the same time, the sandblasting roller body can be adjusted in front and behind by driving the second hydraulic telescopic rod, actively making radial space for the increased fabric roll and avoiding motion interference. Combined with the axial guard formed by the lifting arc plate of the unwinding assembly during winding, the neatness and stability of the fabric roll are ensured during the high-speed winding process. 3) The device has achieved comprehensive improvements in operational safety and ease of use. The magnetic powder brake can apply a controllable torque to the mirror roller at the end of winding, achieving smooth deceleration and stopping of the roll, effectively suppressing loosening caused by inertial rotation. When the operation stops, the brake can quickly apply a controllable torque to the rotating parts, achieving smooth deceleration and stopping of the roll, effectively preventing loosening caused by inertia and improving operational safety. In addition, the storage rack located at the rear of the frame allows for the orderly storage of spare iron pipes, shortening the roll change preparation time and improving the continuity of operations and the standardization of on-site management. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of an M-fold container bag automatic unwinding and rewinding device according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of an M-fold container bag automatic unwinding and rewinding device according to the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the connection structure of the base plate, frame, correction assembly and guide roller assembly of the present invention; Figure 4 This is a schematic diagram of the connection structure of the frame, winding assembly, and unwinding assembly of the present invention. Figure 1 ; Figure 5 This is a schematic diagram of the connection structure of the frame, winding assembly, and unwinding assembly of the present invention. Figure 2 ; Figure 6 This is a schematic diagram of the chain pressing component of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Frame; 21. Side plate; 22. Support rod; 23. Top plate; 3. Correction assembly; 31. Linear guide rail; 32. Slider; 33. Correction base plate; 34. First hydraulic telescopic rod; 4. Guide roller assembly; 41. Guide roller shaft; 42. Guide roller body; 43. First driven sprocket; 5. Rewinding assembly; 51. Sandblasting roller assembly; 511. Sandblasting roller body; 512. Second driven sprocket; 513. Bearing slide; 514. Bearing square seat; 515. Second hydraulic telescopic rod; 52. Mirror roller; 521. Third driven sprocket; 53. Chain 531. Downward pressing assembly; 532. Vertical plate; 533. Second linear slide rail; 534. Chain slide; 535. Pressure plate; 536. Chain drive mechanism; 537. Transition sprocket; 538. Limit switch; 539. Lead screw; 500. Spring; 510. Roller; 52. Magnetic powder brake; 6. Unwinding assembly; 61. Lifting arm; 62. Lifting arc plate; 63. Third hydraulic telescopic rod; 7. Drive assembly; 71. Drive motor; 72. Hydraulic station; 73. Drive sprocket; 74. Tensioner; 8. Control panel; 9. Iron pipe; 10. Fabric roll; 11. Placement rack. Detailed Implementation

[0020] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] like Figure 1-6 As shown, an automatic winding and unwinding device for M-fold container bags includes a base plate 1, a frame 2, a correction assembly 3, a guide roller assembly 4, a winding assembly 5, an unwinding assembly 6, a drive assembly 7, and a control panel 8. The frame 2 is slidably connected to the top of the base plate 1 via the correction assembly 3, which drives the frame 2 to slide in a direction perpendicular to the material conveying direction. The guide roller assembly 4 is installed on the side of the frame 2 near the feed end. The winding assembly 5 and the unwinding assembly 6 are sequentially arranged on the frame 2 along the material conveying direction. The drive assembly 7 is installed on the frame 2 and drives the guide roller assembly 4, the winding assembly 5, and the unwinding assembly 6. The control panel 8 is installed on one side of the frame 2, and the correction assembly 3, the winding assembly 5, the unwinding assembly 6, and the drive assembly 7 are all electrically connected to the control panel 8.

[0022] Specifically, this device aligns the entire frame 2 onto the sliding alignment component 3, allowing operators to easily adjust the alignment of the entire device with the output position of the upstream circular loom using the control panel 8. This eliminates the need for manual movement of the heavy frame 2, significantly reducing labor intensity and improving alignment efficiency and accuracy. The control panel 8 centrally controls all electric and hydraulic components, automating the winding, unwinding, and alignment processes, ensuring the continuity and stability of the production flow.

[0023] Specifically, the frame 2 includes side plates 21, support rods 22 and a top plate 23. The two side plates 21 are arranged opposite to each other, and at least two support rods 22 are horizontally fixedly connected between the two side plates 21. The top plate 23 is fixedly connected to the top of the two side plates 21.

[0024] Specifically, the frame-type frame 2, consisting of side plates 21, struts 22, and a top plate 23, has a stable structure and can provide reliable support for the complex internal transmission and winding / unwinding mechanisms. The side plates 21 provide a unified mounting reference for each rotating shaft and sliding component, the struts 22 enhance the overall rigidity, and the top plate 23 can be used to install auxiliary facilities such as lighting or safety protection.

[0025] Specifically, the correction assembly 3 includes a linear slide rail 31, a slider 32, a correction base plate 33, and a first hydraulic telescopic rod 34. The two linear slide rails 31 are fixed parallel to each other on the top of the base plate 1. The four sliders 32 are respectively fixed to the bottom of the two side plates 21 of the frame 2 and are slidably connected to the linear slide rails 31. The correction base plate 33 is fixedly connected to the base plate 1. One end of the first hydraulic telescopic rod 34 is hinged to the correction base plate 33, and the other end of the first hydraulic telescopic rod 34 is hinged to the side plate 21.

[0026] Specifically, the correction assembly 3 ensures smooth and unobstructed sliding of the frame 2 through the precise cooperation of the linear guide rail 31 and the slider 32. The extension and retraction of the first hydraulic telescopic rod 34 is converted into the lateral linear motion of the frame 2 through the hinge point, providing large thrust and precise control. When the upstream material deviates from its designated path, the operator initiates the correction through the control panel 8. The first hydraulic telescopic rod 34 pushes or pulls the frame 2 for overall fine-tuning until the center line of the bobbin on the guide roller assembly 4 coincides with the center line of the device, thereby ensuring the neatness of the winding.

[0027] Specifically, the guide roller assembly 4 includes a guide roller shaft 41, a guide roller body 42, and a first driven sprocket 43. Multiple guide roller shafts 41 are rotatably connected in parallel between the two side plates 21 and are arranged at intervals along the material conveying direction. The guide roller bodies 42, which are fixedly sleeved on each guide roller shaft 41, are staggered in the vertical direction. At least one guide roller shaft 41 is fixedly connected to the end of the first driven sprocket 43, and the first driven sprocket 43 is connected to the drive assembly 7 through a chain.

[0028] Specifically, the guide roller bodies 42 are staggered in the vertical direction, causing the bonded bobbin fabric and inner lining film to wrap around each other in an S-shaped path during conveying. This not only increases the contact area and wrap angle between the material and the guide rollers, helping to flatten the material and eliminate wrinkles, but also forms a certain tension buffer zone between the feeding end and the winding end, making the tension more uniform. The driven guide roller shaft 41 obtains power through the first driven sprocket 43, which can actively pull the material and reduce the load on the winding assembly.

[0029] Specifically, the winding assembly 5 includes a sandblasting roller assembly 51, a mirror roller 52, a chain pressing assembly 53, and a magnetic powder brake 54. The sandblasting roller assembly 51 is slidably connected to the side plate 21 along the material conveying direction. The mirror roller 52 is rotatably connected to the side plate 21 and located downstream of the sandblasting roller assembly 51. The chain pressing assembly 53 is used to press the material located above the sandblasting roller assembly 51 and the mirror roller 52. The sandblasting roller assembly 51 includes a sandblasting roller body 511, a second driven sprocket 512, a bearing slide 513, a bearing square seat 514, and a second hydraulic telescopic rod 515. Two bearing slides 513 are fixedly fixed to the side plate 21 at intervals along the vertical direction. The bearing square seat 514 is slidably connected between the two bearing slides 513. The sandblasting roller body 511 is rotatably supported in the bearing square seat 514 by bearings, and the second driven sprocket 512 is fixedly connected to one end of the sandblasting roller body 511. One end of the second hydraulic telescopic rod 515 is fixedly connected to the side plate 21, and the other end is fixedly connected to the bearing seat 514. One end of the mirror roller 52 is rotatably connected to the side plate 21 through a bearing and extends outward. The extended end of the mirror roller 52 is coaxially connected to the output shaft of the magnetic powder brake 54. A third driven sprocket 521 is fixedly connected to the mirror roller 52. The third driven sprocket 521 is connected to the drive assembly 7 through a chain. The magnetic powder brake 54 is electrically connected to the control panel 8.

[0030] Specifically, the surface of the sandblasting roller body 511 has a high coefficient of friction. Together with the mirror roller 52, it supports and drives the iron pipe 9 to rotate and rewind. The entire sandblasting roller assembly 51 can be driven by the second hydraulic telescopic rod 515 to slide back and forth along the bearing slide 513. Its beneficial effect is that as the diameter of the fabric roll 10 gradually increases, the position of the sandblasting roller body 511 can be adjusted backward to provide space for the increase in the diameter of the fabric roll 10. The smooth surface of the mirror roller 52 helps to reduce friction with the inner layer of the fabric roll. The magnetic powder brake 54 is coaxially connected to the mirror roller 52 and electrically connected to the control panel 8. Its main functions are: first, when the winding operation needs to be stopped, it can quickly apply a controllable braking torque to the rotating mirror roller 52, so that it can smoothly decelerate and stop, and then stop the fabric roll 10 synchronously through friction, effectively preventing loosening caused by inertia.

[0031] Specifically, the chain pressing assembly 53 includes a vertical plate 531, a second linear slide rail 532, a chain slide member 533, a pressure plate 534, a chain transmission mechanism 535, a lead screw 536, a spring 537, and a roller 538. Two vertical plates 531 are symmetrically fixedly connected to two side plates 21. The second linear slide rail 532 is vertically fixedly connected to the inner side of the vertical plate 531. The chain slide member 533 is slidably connected to the second linear slide rail 532 via a first slider and is fixedly connected to the chain of the chain transmission mechanism 535. The pressure plate 534 is slidably connected to the second linear slide rail 532 via a second slider. The two lead screws 536 are located below the chain slide 533. The lower ends of the two lead screws 536 are fixedly connected to the pressure plate 534. The upper ends of the lead screws 536 pass through the chain slide 533 and are limited by nuts. The spring 537 is sleeved on each lead screw 536, and its two ends abut against the chain slide 533 and the pressure plate 534 respectively. The two rollers 538 are rotatably connected to the bottom of the pressure plate 534 and are used to press down and contact the iron pipe 9 placed on the sandblasting roller body 511 and the mirror roller 52 during the winding operation. The iron pipe 9 is used for winding the conveyed tubular cloth to form the cloth roll 10.

[0032] Specifically, the core function of the chain pressing assembly 53 is to apply stable downward pressure to the iron pipe 9 throughout the winding process. Its beneficial effects are as follows: the elastic pressing mechanism, composed of the lead screw 536, spring 537, and pressure plate 534, can automatically adapt to the increasing diameter of the fabric roll 10 through the compression deformation of the spring 537, maintaining constant pressure contact between the roller 538 and the fabric roll 10 (initially through the iron pipe 9), effectively preventing loosening and collapse of the fabric roll due to insufficient pressure during winding. The chain drive mechanism 535 is responsible for driving the entire pressing mechanism to perform a wide range of lifting and lowering positioning according to the fabric roll diameter.

[0033] Specifically, the chain drive mechanism 535 includes a transition sprocket 5351, a first chain, and a hydraulic motor. The two transition sprockets 5351 are rotatably connected to the top and bottom of the inner cavity of the vertical plate 531, respectively. The first chain is tensioned and wrapped around the two transition sprockets 5351. The hydraulic motor is driven by one of the transition sprockets 5351. One end of the chain slide 533 passes through the cavity wall of the vertical plate 531 and is fixedly connected to the first chain. The vertical plate 531 has a groove for the chain slide 533 to slide up and down. Limit switches 5352 are installed at the top and bottom of the inner cavity of the vertical plate 531 to detect the position of the chain slide 533. The limit switches 5352 are electrically connected to the control panel 8.

[0034] Specifically, the chain drive mechanism 535 provides power to the pressing mechanism. The hydraulic motor drives the transition sprocket 5351 to rotate, which drives the first chain to circulate. This, in turn, pulls the chain slide 533, which is fixed to the first chain, to move up and down precisely along the second linear slide rail 532. The limit switches 5352 installed at the top and bottom are used to detect whether the chain slide 533 has reached the preset highest and lowest safe positions and to feed the signals back to the control panel 8. The control panel 8 can then command the hydraulic motor to stop operating, thereby achieving automatic protection and precise control of the pressing mechanism's stroke and preventing mechanical overtravel damage.

[0035] Specifically, the unwinding assembly 6 includes lifting arms 61, lifting arc plates 62, and third hydraulic telescopic rods 63. The two lifting arms 61 are rotatably connected to both ends of the mirror roller 52 and can rotate around the axis of the mirror roller 52. The lifting arc plates 62 are fixedly connected between the two lifting arms 61. The two third hydraulic telescopic rods 63 are respectively arranged on the outer sides of the two lifting arms 61. One end of the third hydraulic telescopic rod 63 is hinged to the side plate 21, and the other end is hinged to the corresponding lifting arm 61.

[0036] The unwinding assembly 6 is also provided with a pusher telescopic rod, which is installed on the side plate 21 and its extension direction is perpendicular to the axis of the sandblasting roller body 511 and the mirror roller 52. A push plate is connected to one end of the pusher telescopic rod facing the lifting arc plate 62, which is used to push the cloth roll 10 towards the lifting arc plate 62 during unloading. The pusher telescopic rod is electrically connected to the control panel 8.

[0037] Specifically, the unwinding assembly 6 is mainly used to provide auxiliary winding support for the fabric roll 10 and to perform final unwinding and unloading. During the winding process, the lifting arc plate 62, pushed by the third hydraulic telescopic rod 63, flips over to above the mirror roller 52 and the sandblasting roller body 511, forming an arc-shaped guard to prevent the growing fabric roll 10 from slipping to one side during rotation. When the fabric roll 10 reaches the preset size and needs to be unloaded, the control panel 8 instructs the magnetic powder brake 54 and the drive motor 71 to stop, and then controls the third hydraulic telescopic rod 63 to retract, pulling the lifting arm 61 and the lifting arc plate 62 to flip outward and downward, making room for unloading the fabric roll 10.

[0038] Specifically, the drive assembly 7 includes a drive motor 71, a hydraulic station 72, a drive sprocket 73, and a tensioning wheel 74. The drive motor 71 and the hydraulic station 72 are both mounted on the side plate 21 of the frame 2. The output shaft of the drive motor 71 passes through the side plate 21 and is fixedly connected to the drive sprocket 73. The drive sprocket 73 is connected to the first driven sprocket 43, the second driven sprocket 512, and the third driven sprocket 521 via a second chain. The tensioning wheel 74 is rotatably connected to the frame 2 and presses against the second chain. The hydraulic station 72 is connected to the hydraulic motors of the first hydraulic telescopic rod 34, the second hydraulic telescopic rod 515, the third hydraulic telescopic rod 63, and the chain drive mechanism 535 via hydraulic pipelines. The drive motor 71 and the hydraulic station 72 are both electrically connected to the control panel 8.

[0039] Specifically, the drive assembly 7 adopts a single-motor centralized drive and a hydraulic station centralized fluid supply method, which is compact in structure and easy to control. The drive motor 71 drives the guide roller assembly 4, the sandblasting roller body 511, and the mirror roller 52 to rotate synchronously through the drive sprocket 73 and the second chain, ensuring the synchronization of the linear speeds of each moving roller and avoiding tension fluctuations or material pulling caused by asynchronous speeds of multiple motors. The tension wheel 74 is used to adjust the tension of the second chain to ensure smooth and reliable transmission. The hydraulic station 72 serves as the power source for the entire device, providing stable hydraulic oil to all hydraulic telescopic rods and hydraulic motors. The control panel 8 controls the operation of each hydraulic valve, thereby automating the execution of various complex actions such as correction, sandblasting roller position adjustment, lowering and lowering of the pressing mechanism, and unwinding plate flipping.

[0040] Specifically, the rear of the frame 2 is also fixed with a storage rack 11 for storing spare iron pipes 9.

[0041] Specifically, a placement rack 11 is installed at the rear of the frame 2. Its advantage is that spare iron pipes 9 can be stored nearby and neatly. After a roll of cloth 10 is finished and unloaded, the operator can easily take a new iron pipe 9 from the placement rack 11 and place it on the sandblasting roller body 511 and the mirror roller 52 to start the next roll winding operation. This greatly shortens the production preparation time, improves the continuity and efficiency of the operation, and also avoids the safety hazards that may be caused by the random placement of iron pipes 9.

[0042] The process of using this invention is as follows: Phase 1: Start-up preparation and automatic alignment. The operator starts the device via control panel 8, removes the spare iron pipe 9 from the placement rack 11, and places it horizontally between the sandblasting roller body 511 and the mirror roller 52. Subsequently, the hydraulic station 72 is started via control panel 8 to control the extension and retraction of the first hydraulic telescopic rod 34, driving the entire frame 2 to slide laterally along the linear slide rail 31 until the center line of the guide roller assembly 4 on the device is aligned with the center line of the bobbin fabric conveyed by the upstream circular loom, completing the automatic correction and alignment. The second stage involves material threading and automatic winding. The end of the coiled fabric from the upstream feed is routed around multiple staggered guide roller bodies 42 and then wound several times around the iron pipe 9. The drive motor 71 is activated via the control panel 8. The drive motor 71 drives the first driven sprocket 43, the second driven sprocket 512, and the third driven sprocket 521 to rotate synchronously via the driving sprocket 73 and the second chain. This causes the guide roller bodies 42, the sandblasting roller body 511, and the mirror roller 52 to rotate, initiating the traction and winding of the coiled fabric. Simultaneously, the hydraulic motor controlling the chain drive mechanism 535 operates, driving the chain slide 533 downwards until the roller 538 at the bottom of the pressure plate 534 contacts and presses against the iron pipe 9. The spring 537 provides a constant elastic downward pressure. As the diameter of the fabric roll 10 increases, the chain drive mechanism 535 intermittently raises the chain slide 533 under the command of the control panel 8, compressing and deforming the spring 537, ensuring that the roller 538 maintains constant pressure contact with the fabric roll 10. Simultaneously, the second hydraulic telescopic rod 515 can be controlled to retract intermittently, driving the sandblasting roller body 511 to move backward, making radial space for the enlarged fabric roll 10. The lifting arc plate 62 rises during the winding process to axially limit the fabric roll 10; The third stage: unloading and assisted unwinding. When the diameter of the fabric roll 10 reaches the preset value, the control panel 8 issues a stop command, the drive motor 71 stops, and the magnetic powder brake 54 actuates to bring the mirror roller 52 and the fabric roll 10 to a smooth stop. Then, the unloading procedure is executed: 1) The control panel 8 first commands the extension rod to extend, and pushes the cloth roll 10 laterally through the push plate, so that it slides off the mirror roller 52 and the sandblasting roller body 511 and rolls down onto the lifting arc plate 62 which is already in the raised state. 2) Next, the third hydraulic telescopic rod 63 is retracted, pulling the lifting arm 61 and the lifting arc plate 62 to slowly rotate outward and downward. The cloth roll 10 is then smoothly transferred to the preset collection area, completing the safe unloading. After unloading, the pusher telescopic rod retracts, and the lifting arc plate 62 returns to the horizontal or retracted state. At this point, a standard winding operation cycle is completed, and the iron pipe 9 is removed along with the finished cloth roll 10.

[0043] The fourth stage: unwinding operation and iron pipe recovery. This device can also be used to unwind (i.e., unwind) the wound cloth roll 10 in the reverse direction. The operation process is as follows: 1) Loading and preparation: The fabric roll 10 to be unwound is hoisted and placed on the sandblasting roller body 511 and the mirror roller 52, with the lifting arc plate 62 providing auxiliary support and axial limiting. The unwinding (unwinding) working mode is selected through the control panel 8; 2) Path setting: Lead out the end of the fabric roll 10 and guide it to the downstream equipment or process via the guide roller assembly 4; 3) Unwinding (unwinding): The drive motor 71 is started at low speed and reversed via the control panel 8. The power is synchronously transmitted to the mirror roller 52, the sandblasting roller body 511, and the guide roller body 42 via the chain system, driving the fabric roll 10 to actively reverse, thereby smoothly unwinding and outputting the material. During this process, the front and rear positions of the sandblasting roller body 511 can be adjusted by controlling the second hydraulic telescopic rod 515 to adapt to the reduction in fabric roll diameter and maintain stable support. At the same time, the chain transmission mechanism 535 drives the chain slide 533 to intermittently descend under the command of the control panel 8, so that the roller 538 always maintains constant pressure contact with the gradually decreasing fabric roll 10 under the action of the spring 537. 4) Stopping and Iron Pipe Recycling: After all the material on the cloth roll 10 has been unwound, the control panel 8 stops the drive motor 71 and, if necessary, activates the magnetic powder brake 54 to bring the mirror roller 52 and the remaining iron pipe 9 to a smooth stop. Then, the second hydraulic telescopic rod 515 retracts, driving the sandblasting roller body 511 forward (closer to the feed end), significantly increasing the gap between the two rollers. The iron pipe 9 then falls onto the placement rack 11 located at the tail of the frame 2 under gravity, completing the recycling of the empty iron pipe.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0045] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An automatic unwinding and rewinding device for M-fold container bags, characterized in that: The assembly includes a base plate (1), a frame (2), a web guiding assembly (3), a guide roller assembly (4), a winding assembly (5), an unwinding assembly (6), a drive assembly (7), and a control panel (8). The frame (2) is slidably connected to the top of the base plate (1) via the web guiding assembly (3). The web guiding assembly (3) is used to drive the frame (2) to slide in a direction perpendicular to the material conveying direction. The guide roller assembly (4) is installed on the side of the frame (2) near the feed end. The winding assembly (5) and the unwinding assembly (6) are arranged sequentially on the frame (2) along the material conveying direction. The drive assembly (7) is installed on the frame (2) and is used to drive the guide roller assembly (4), the winding assembly (5), and the unwinding assembly (6) to run. The control panel (8) is installed on one side of the frame (2), and the web guiding assembly (3), the winding assembly (5), the unwinding assembly (6), and the drive assembly (7) are all electrically connected to the control panel (8).

2. The automatic unwinding and rewinding device for M-fold container bags according to claim 1, characterized in that: The frame (2) includes side plates (21), support rods (22) and a top plate (23). The two side plates (21) are arranged opposite to each other, and at least two support rods (22) are horizontally fixedly connected between the two side plates (21). The top plate (23) is fixedly connected to the top of the two side plates (21).

3. The automatic unwinding and rewinding device for M-fold container bags according to claim 2, characterized in that: The correction assembly (3) includes a linear slide rail (31), a slider (32), a correction base plate (33), and a first hydraulic telescopic rod (34). The two linear slide rails (31) are fixed parallel to each other on the top of the base plate (1). The four sliders (32) are respectively fixed to the bottom of the two side plates (21) of the frame (2) and are slidably connected to the linear slide rails (31). The correction base plate (33) is fixedly connected to the base plate (1). One end of the first hydraulic telescopic rod (34) is hinged to the correction base plate (33), and the other end of the first hydraulic telescopic rod (34) is hinged to the side plate (21).

4. The automatic unwinding and rewinding device for M-fold container bags according to claim 3, characterized in that: The guide roller assembly (4) includes a guide roller shaft (41), a guide roller body (42), and a first driven sprocket (43). Multiple guide roller shafts (41) are rotatably connected between two side plates (21) and are arranged at intervals along the material conveying direction. The guide roller bodies (42) fixedly sleeved on each guide roller shaft (41) are staggered in the vertical direction. The end of at least one guide roller shaft (41) is fixedly connected to the first driven sprocket (43). The first driven sprocket (43) is connected to the drive assembly (7) through a chain.

5. The automatic unwinding and rewinding device for M-fold container bags according to claim 4, characterized in that: The winding assembly (5) includes a sandblasting roller assembly (51), a mirror roller (52), a chain pressing assembly (53), and a magnetic powder brake (54). The sandblasting roller assembly (51) is slidably connected to the side plate (21) along the material conveying direction. The mirror roller (52) is rotatably connected to the side plate (21) and located downstream of the sandblasting roller assembly (51). The chain pressing assembly (53) is used to press the material located above the sandblasting roller assembly (51) and the mirror roller (52). The sandblasting roller assembly (51) includes a sandblasting roller body (511), a second driven sprocket (512), a bearing slide (513), a bearing square seat (514), and a second hydraulic telescopic rod (515). The two bearing slides (513) are fixedly fixed to the side plate (21) at intervals in the vertical direction. The bearing square seat (514) is slidably connected between the two bearing slides (513). The sandblasting roller body (511) is rotatably supported in the bearing square seat (514) by bearings, and the second driven sprocket (512) is fixedly connected to one end of the sandblasting roller body (511). One end of the second hydraulic telescopic rod (515) is fixedly connected to the side plate (21), and the other end is fixedly connected to the bearing seat (514). One end of the mirror roller (52) is rotatably connected to the side plate (21) through the bearing and extends outward. The extended end of the mirror roller (52) is coaxially connected to the output shaft of the magnetic powder brake (54). A third driven sprocket (521) is fixedly connected to the mirror roller (52). The third driven sprocket (521) is connected to the drive assembly (7) through a chain. The magnetic powder brake (54) is electrically connected to the control panel (8).

6. The automatic unwinding and rewinding device for M-fold container bags according to claim 5, characterized in that: The chain pressing assembly (53) includes a vertical plate (531), a second linear slide rail (532), a chain slide member (533), a pressure plate (534), a chain transmission mechanism (535), a lead screw (536), a spring (537), and a roller (538). The two vertical plates (531) are symmetrically fixedly connected to the two side plates (21). The second linear slide rail (532) is vertically fixedly connected to the inner side of the vertical plate (531). The chain slide member (533) is slidably connected to the second linear slide rail (532) through a first slider and is fixedly connected to the chain of the chain transmission mechanism (535). The pressure plate (534) is slidably connected to the second linear slide rail (532) through a second slider. The two screws (536) are fixedly connected to the pressure plate (534) at their lower ends. The upper ends of the screws (536) pass through the chain slide (533) and are limited by nuts. The spring (537) is sleeved on each screw (536) and its two ends abut against the chain slide (533) and the pressure plate (534) respectively. The two rollers (538) are rotatably connected to the bottom of the pressure plate (534) and are used to press down and contact the iron pipe (9) placed on the sandblasting roller body (511) and the mirror roller (52) during the winding operation. The iron pipe (9) is used for winding the conveyed tubular cloth to form a cloth roll (10).

7. The automatic unwinding and rewinding device for M-fold container bags according to claim 6, characterized in that: The chain drive mechanism (535) includes a transition sprocket (5351), a first chain, and a hydraulic motor. The two transition sprockets (5351) are rotatably connected to the top and bottom of the inner cavity of the vertical plate (531), respectively. The first chain is tensioned and wrapped around the two transition sprockets (5351). The hydraulic motor is driven and connected to one of the transition sprockets (5351). One end of the chain slide (533) passes through the cavity wall of the vertical plate (531) and is fixedly connected to the first chain. The vertical plate (531) has a groove for the chain slide (533) to slide up and down. Limit switches (5352) are installed at the top and bottom of the inner cavity of the vertical plate (531) respectively to detect the position of the chain slide (533). The limit switches (5352) are electrically connected to the control panel (8).

8. The automatic unwinding and rewinding device for M-fold container bags according to claim 7, characterized in that: The unwinding assembly (6) includes a lifting arm (61), a lifting arc plate (62), and a third hydraulic telescopic rod (63). The two lifting arms (61) are rotatably connected to the two ends of the mirror roller (52) and can rotate around the axis of the mirror roller (52). The lifting arc plate (62) is fixedly connected between the two lifting arms (61). The two third hydraulic telescopic rods (63) are respectively arranged on the outside of the two lifting arms (61). One end of the third hydraulic telescopic rod (63) is hinged to the side plate (21), and the other end is hinged to the corresponding lifting arm (61). The unwinding assembly (6) is also provided with a pusher telescopic rod, which is installed on the side plate (21) and its extension direction is perpendicular to the axis of the sandblasting roller body (511) and the mirror roller (52). The end of the pusher telescopic rod facing the lifting arc plate (62) is connected to a push plate, which is used to push the cloth roll (10) towards the lifting arc plate (62) during unloading. The pusher telescopic rod is electrically connected to the control panel (8).

9. An automatic unwinding and rewinding device for M-fold container bags according to claim 8, characterized in that: The drive assembly (7) includes a drive motor (71), a hydraulic station (72), a drive sprocket (73), and a tensioning wheel (74). The drive motor (71) and the hydraulic station (72) are both mounted on the side plate (21) of the frame (2). The output shaft of the drive motor (71) passes through the side plate (21) and is fixedly connected to the drive sprocket (73). The drive sprocket (73) is connected to the first driven sprocket (43) and the second driven sprocket (512) via a second chain. The third driven sprocket (521) is connected to the transmission, the tension wheel (74) is rotatably connected to the frame (2) and presses against the second chain, the hydraulic station (72) is connected to the hydraulic motors of the first hydraulic telescopic rod (34), the second hydraulic telescopic rod (515), the third hydraulic telescopic rod (63) and the chain transmission mechanism (535) through hydraulic pipelines, and the drive motor (71) and the hydraulic station (72) are both electrically connected to the control panel (8).

10. An automatic unwinding and rewinding device for M-fold container bags according to claim 2, characterized in that: The rear of the frame (2) is also fixed with a storage rack (11) for storing spare iron pipes (9).

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