A winding device for PET film production

Abstract

The present application discloses a winding device for PET film production, and relates to the technical field of winding devices. The present application includes: a support frame, which includes a connecting frame and a bearing frame arranged in parallel and opposite to each other, and a conveying roller group is rotatably installed between the connecting frame and the bearing frame; a winding assembly, including a flip shaft rotatably installed on the connecting frame, and a reduction motor for driving the flip shaft to rotate is fixedly connected to the connecting frame, and a flip plate is fixedly connected to the flip shaft, and both ends of the flip plate are fixedly connected to bearing seats, and an expansion splicing roller for sleeve-connecting a supporting reel is rotatably installed on the bearing seat; a feeding mechanism includes a mounting frame obliquely installed on one side of the bearing frame, and a conveyor belt is arranged in the mounting frame. By arranging a rotating shaft on the connecting frame, the present application can use a reduction motor to control the rotation of the flip plate, so as to replace the positions of the two expansion splicing rollers, realize the non-stop reel replacement operation of the PET film, and improve the winding efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of winding devices, and in particular to a winding device for producing PET films. Background Art

[0002] PET film is a packaging film with comprehensive performance. It has good transparency and gloss; good air tightness and fragrance retention; moderate moisture resistance, and its moisture permeability decreases at low temperatures. PET film has excellent mechanical properties, and its toughness is the best among all thermoplastics, and its tensile strength and impact strength are much higher than those of ordinary films.

[0003] When producing PET film, the formed PET film needs to be rolled onto a roll for batch storage. Existing rolling equipment mostly uses manual roll loading, which not only requires manual removal of the roll with the rolled PET film from the equipment, but also requires manual replacement of the new roll onto the equipment. The operation is relatively troublesome, time-consuming and labor-intensive.

[0004] The patent with the patent authorization announcement number CN117303070B discloses a plastic film winding device, including a base, a support component, a winding component, a clamping mechanism, and a horizontal driving mechanism. The support component includes a fixed bracket and a sliding bracket; the winding component includes a winding roller, a winding drum, a locking component and a rotating driving mechanism, and the locking component is used to lock or release the winding drum and the winding roller; the rotating driving mechanism is used to drive the winding roller to rotate; the clamping mechanism is used to clamp the winding drum after the plastic film is wound; the horizontal driving mechanism is used to drive the sliding bracket to move along the horizontal direction of the base, so that the sliding bracket can switch between the winding position and the unloading position. The present invention can quickly move the winding drum after the plastic film is wound to the unloading position for moving and unloading, and at the same time, the new winding drum is loaded and replaced at the loading position, and the connection is smoother, which is convenient for disassembly, replacement and installation of the winding drum. It still requires manual loading and unloading operations, which is time-consuming and labor-intensive, and increases labor costs.

[0005] Therefore, the present invention proposes a winding device for PET film production. Summary of the invention

[0006] The purpose of this application is to solve the problems in the above-mentioned background technology, and provide a winding device for PET film production.

[0007] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0008] A winding device for producing PET film, comprising:

[0009] The support frame comprises a connecting frame and a bearing frame which are arranged parallel to each other, and a conveying roller group is rotatably mounted between the connecting frame and the bearing frame;

[0010] The winding assembly comprises a turning shaft rotatably mounted on a connecting frame, a reduction motor for driving the turning shaft to rotate is fixedly connected to the connecting frame, a turning plate is fixedly connected to the turning shaft, bearing seats are fixedly connected to both ends of the turning plate, and an expansion splicing roller for sleeve-connecting a supporting reel is rotatably mounted on the bearing seat;

[0011] The feeding mechanism comprises a mounting frame obliquely mounted on one side of the carrier frame, a conveyor belt is arranged in the mounting frame, and an arc-shaped turning frame located at the end of the conveyor belt and used for receiving the reel is arranged at one end of the mounting frame;

[0012] The pushing assembly comprises a cross bar fixedly connected between the connecting frame and the bearing frame, a pushing block for resisting one end of the reel is slidably mounted on the cross bar, and a hook rod arranged along the length direction of the cross bar is fixedly connected to the pushing block.

[0013] Furthermore, the conveying roller group includes a tensioning roller, a conveying roller and an auxiliary roller rotatably installed between the connecting frame and the supporting frame. The tensioning roller, conveying roller and auxiliary roller are arranged in a triangle and the PET film is wound thereon. A driving motor for driving the conveying roller to rotate is installed on the supporting frame.

[0014] Furthermore, the tensioning roller includes a fixed shaft rotatably installed between the connecting frame and the supporting frame, two flip rods are hinged on the fixed shaft, a lifting shaft is rotatably installed between the ends of the two flip rods, and cylinder push rods are hinged on the connecting frame and the supporting frame, and the movable ends of the two cylinder push rods are respectively hinged at the middle of the two flip rods.

[0015] Furthermore, the expansion splicing roller includes a support shaft rotatably mounted on a bearing seat, the support shaft has two positioning rings fixedly sleeved on it and two movable rings slidably sleeved on it, the positioning rings and the movable rings are arranged opposite to each other and symmetrically distributed on the support shaft, a plurality of connecting rods are hingedly arranged along a circumferential array on the opposite surfaces of the positioning rings and the movable rings, expansion plates located between the positioning rings and the movable rings are hingedly connected between the connecting rods, and the opposite surfaces of the positioning rings and the movable rings are respectively connected with an iron ring block and an annular electromagnet sleeved on the support shaft.

[0016] Furthermore, a slide rail is installed on the cross bar along its length direction, a screw is rotatably installed inside the cross bar, an n-type plate that slides through the cross bar is threadedly sleeved on the screw, a rotating motor for driving the screw to rotate is fixedly connected to the connecting frame, and the pushing block is installed on the n-type plate.

[0017] Furthermore, the support shaft is provided with a plurality of positioning bars in an array along its circumference, the positioning bars being arranged on the side of one of the positioning rings, and push grooves being provided between the positioning bars, and the pushing block comprising a moving block slidably mounted on the n-type plate, the moving block being provided with a column rod inserted into one side of the push groove, and a positioning bolt which is threadedly penetrated and abuts against the n-type plate is provided on the moving block.

[0018] Furthermore, the hook rod comprises an extension rod constructed on the moving block along the length direction of the cross bar, the extension rod is arranged on the horizontal side of the expansion splicing roller, and the end of the extension rod is constructed with an L-shaped hanging block arranged toward the expansion splicing roller.

[0019] Furthermore, the arc-shaped flip frame comprises a rolling frame, a telescopic bracket is hinged on one side of the rolling frame, and a receiving frame is hinged on the telescopic bracket via a torsion spring.

[0020] Furthermore, the rolling frame includes a plurality of rotating tubes, and the plurality of rotating tube arrays are distributed at one end of the conveyor belt and are arranged flush with the conveyor belt. The rotating tubes are connected to the bottom opening of the receiving frame, a baffle is constructed on the top of the receiving frame, and a side plate for resisting the hook rod is constructed on the side of the receiving frame.

[0021] Furthermore, the telescopic bracket includes a vertical frame fixedly connected to one side of the installation frame, a mobile frame is slidably inserted on the vertical frame, an electric push rod is connected between the vertical frame and the mobile frame, the middle part of the receiving frame is hinged to the top of the mobile frame, and a support block is constructed on one side of the top of the mobile frame for limiting the flipping angle of the receiving frame.

[0022] The beneficial effects of this application are as follows:

[0023] 1. The present application arranges a rotating shaft on the connecting frame and can use a reduction motor to control the rotation of the flip plate, thereby replacing the positions of the two expansion splicing rollers, realizing the operation of replacing the roll of PET film without stopping the machine, and improving the winding efficiency.

[0024] 2. In the present application, when one of the expansion splicing rollers is performing the winding operation, the other expansion splicing roller can automatically detach the reel sleeved thereon through the pushing assembly, and then use the hook rod to hook the reel in the feeding mechanism and replace it. It operates automatically without the need for manual operation, thus saving manpower and time, improving the efficiency of reel replacement, and increasing convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural diagram of this application;

[0026] Figure 2 It is a half-section diagram of the three-dimensional structure of the present application;

[0027] Figure 3 This is another perspective three-dimensional structure diagram of this application;

[0028] Figure 4 It is a partial three-dimensional structural diagram of this application;

[0029] Figure 5 It is another partial three-dimensional structure diagram of the present application;

[0030] Figure 6 This is a three-dimensional structural diagram of the expansion splicing roller of the present application;

[0031] Figure 7 It is a three-dimensional structural diagram of the feeding mechanism of this application;

[0032] Figure 8 This application Figure 7 The enlarged view of point A in the middle;

[0033] Figure numerals: 1, support frame; 101, connecting frame; 102, bearing frame; 2, conveying roller group; 201, tensioning roller; 2011, fixed shaft; 2012, turning rod; 2013, lifting shaft; 2014, cylinder push rod; 202, conveying roller; 203, auxiliary roller; 204, driving motor; 3, winding assembly; 301, turning shaft; 302, reduction motor; 303, turning plate; 304, bearing seat; 305, expansion plug-in roller; 3051, supporting shaft; 3052, positioning ring; 3053, moving ring; 3054, connecting rod; 3055, expansion plate; 3056, iron ring block; 3057, annular electromagnet; 4, feeding mechanism; 401, installation frame; 40 2. Conveyor belt; 403. Arc-shaped flip frame; 4031. Rolling frame; 40311. Rotating tube; 4032. Telescopic bracket; 40321. Vertical frame; 40322. Moving frame; 40323. Support block; 40324. Electric push rod; 4033. Receiving frame; 40331. Baffle plate; 40332. Side plate; 5. Pushing assembly; 501. Cross bar; 5011. Slide rail; 5012. Screw rod; 5013. N-type plate; 5014. Rotating motor; 502. Pushing block; 5021. Moving block; 5022. Column rod; 5023. Positioning bolt; 503. Hook rod; 5031. Extension rod; 5032. L-shaped hanging block; 6. Positioning stop rod; 601. Pushing groove. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0035] like Figure 1-Figure 6 As shown, a winding device for producing PET film according to one embodiment of the present application includes:

[0036] The support frame 1 includes a connecting frame 101 and a supporting frame 102 which are arranged in parallel and opposite to each other. A conveying roller group 2 is rotatably installed between the connecting frame 101 and the supporting frame 102. A plurality of supporting rods are arranged between the connecting frame 101 and the supporting frame 102 to increase the stability of the structure. The conveying roller group 2 is mainly used to convey the PET film.

[0037] The winding assembly 3 includes a turning shaft 301 rotatably mounted on a connecting frame 101, a reduction motor 302 for driving the turning shaft 301 to rotate is fixedly connected to the connecting frame 101, a turning plate 303 is fixedly connected to the turning shaft 301, both ends of the turning plate 303 are fixedly connected to bearing seats 304, expansion splicing rollers 305 for sleeved supporting reels are rotatably mounted on the bearing seats 304, and the middle part of the turning plate 303 is fixedly connected to the turning shaft 301. Therefore, when the reduction motor 302 drives the turning shaft 301 to rotate, it will drive the two expansion splicing rollers 305 on the turning plate 303 to rotate around the turning shaft 301, thereby changing the positions of the two expansion splicing rollers 305, and when one of the expansion splicing rollers 305 is performing the PET film winding operation, the other expansion splicing roller 305 is rotated. The expansion splicing roller 305 can be used to replace the reel, so that the two work alternately, which can ensure the uninterrupted and continuous operation of the equipment and improve the winding efficiency. It should be noted that it also includes a driving member for driving one of the expansion splicing rollers 305 to rotate, and the driving member includes a transmission motor, and a spring telescopic rod is fixedly connected to the output shaft of the transmission motor. The spring telescopic rod adopts an existing electromagnetic spring push rod to achieve the telescopic function. The end of the expansion splicing roller 305 is configured with a socket for the spring telescopic rod to be inserted. When one of the expansion splicing rollers 305 rotates to the end of the spring telescopic rod, the spring telescopic rod extends to drive the expansion splicing roller 305 to rotate, thereby realizing the winding work. When it is necessary to replace another expansion splicing roller 305, it is only necessary to contract the spring telescopic rod to perform the disengagement operation;

[0038] It also includes an auxiliary support member, which includes an arc-shaped guide groove constructed on the side of the carrier 102, an arc-shaped support plate hinged at the bottom of the arc-shaped guide groove, and a tension spring is connected to the movable end of the arc-shaped support plate and the outer side of the arc-shaped guide groove. The arc-shaped support plate can provide auxiliary support for the expansion splicing roller 305 flipped into it, and is arranged opposite to the spring telescopic rod to prevent the excessive PET film rolled thereon from causing the flip shaft 301 to rotate, thereby increasing safety. At the same time, the arc-shaped support plate can be opened by the tension of the tension spring when the expansion splicing roller 305 needs to be flipped, so that the expansion splicing roller 305 is separated, thereby ensuring the smooth operation of the device;

[0039] The feeding mechanism 4 comprises a mounting frame 401 which is obliquely mounted on one side of the carrier 102, a conveyor belt 402 is arranged in the mounting frame 401, and an arc-shaped flip frame 403 which is located at the end of the conveyor belt 402 and is used to receive the roll is arranged at one end of the mounting frame 401. It should be noted that the mounting frame 401 comprises a bottom frame and an upper frame, the bottom frame is used to mount the conveyor belt 402, and the bottom frame is obliquely arranged relative to the side of the carrier 102, and the upper frame is two vertical plates, which are mainly used to guide the roll to ensure that the roll can stand upright therein and move through the conveyor belt 402, so as to facilitate the transport of the oblique upright roll into the arc-shaped flip frame 403, and then the roll is flipped to a horizontal state by the arc-shaped flip frame 403, so as to facilitate the subsequent replacement operation, and the feeding mechanism 4 is set to be in an upright state as a whole, which can greatly reduce the space occupied by the equipment and improve practicality;

[0040] The push assembly 5 includes a cross bar 501 fixedly connected between the connecting frame 101 and the carrier frame 102, a push block 502 for resisting one end of the reel is slidably mounted on the cross bar 501, and a hook rod 503 arranged along the length direction of the cross bar 501 is fixedly connected to the push block 502. When one of the expansion splicing rollers 305 is used for winding operation, the other expansion splicing roller 305 is in a position opposite to the arc-shaped flip frame 403. At this time, the push block 502 in the push assembly 5 can be used to push the expansion splicing roller 305 to move. The roll on the connecting roller 305 is detached, and the hook rod 503 will resist the arc-shaped flip frame 403 to flip, and the end of the hook rod 503 will extend to the end of the arc-shaped flip frame 403 to hook the end of the roll. At this time, the roll with the PET film rolled up has been detached, and when the hook rod 503 is reset, the new roll can be hooked onto the expansion splicing roller 305, so as to realize the operation of automatic roll replacement, realize automatic loading and unloading, increase the convenience of the device, no manual operation is required, save manpower and improve efficiency.

[0041] like Figure 2-Figure 4 As shown, in some embodiments, the conveying roller group 2 includes a tensioning roller 201, a conveying roller 202 and an auxiliary roller 203 rotatably installed between the connecting frame 101 and the supporting frame 102. The tensioning roller 201, the conveying roller 202 and the auxiliary roller 203 are arranged in a triangle and the PET film is wound thereon. A driving motor 204 for driving the conveying roller 202 to rotate is installed on the supporting frame 102. The conveying roller 202 is driven to rotate by the driving motor 204, thereby driving the PET film to be conveyed, providing an additional conveying force between the tensioning roller 201 and the expansion splicing roller 305 to prevent the PET film from being stretched and torn, thereby increasing safety.

[0042] like Figure 4As shown, in some embodiments, the tensioning roller 201 includes a fixed shaft 2011 rotatably installed between the connecting frame 101 and the supporting frame 102, two flip rods 2012 are hinged on the fixed shaft 2011, and a lifting shaft 2013 is rotatably installed between the ends of the two flip rods 2012. Cylinder push rods 2014 are hinged on both the connecting frame 101 and the supporting frame 102, and the movable ends of the two cylinder push rods 2014 are respectively hinged at the middle of the two flip rods 2012. The cylinder push rods 2014 can be used to drive the flip rods 2012 to rotate around the fixed shaft 2011, thereby driving the lifting shaft 2013 at the end of the flip rod 2012 to rise and fall, so as to support the bottom of the PET film to ensure that the PET film is always in a tensioned state, avoid folding during the winding operation, and increase the safety of the device.

[0043] like Figure 5-Figure 6 As shown, in some embodiments, the expansion splicing roller 305 includes a support shaft 3051 rotatably mounted on the bearing seat 304, and two positioning rings 3052 are fixedly sleeved on the support shaft 3051 and two moving rings 3053 are slidably sleeved. The positioning rings 3052 and the moving rings 3053 are arranged opposite to each other in pairs and are symmetrically distributed on the support shaft 3051. A plurality of connecting rods 3054 are hinged along their circumferential arrays on the opposite surfaces of the positioning rings 3052 and the moving rings 3053, and expansion plates 3055 located between the positioning rings 3052 and the moving rings 3053 are hinged between the connecting rods 3054. The opposite surfaces of the positioning rings 3052 and the moving rings 3053 are respectively connected with iron ring blocks 3056 and annular electromagnets 3057 sleeved on the support shaft 3051. The expansion splicing roller 305 has two states, one of which is the annular electromagnet. When the magnet 3057 is not energized, the iron ring block 3056 is not connected to the annular electromagnet 3057. At this time, the connecting rod 3054 will not apply a thrust to the expansion plate 3055, thereby causing the movable ring 3053 to move away from the positioning ring 3052, making it convenient to pull the reel sleeved on the expansion plate 3055 off. The second state is that the annular electromagnet 3057 is energized. At this time, the annular electromagnet 3057 will attract the iron ring block 3056, thereby driving the movable ring 3053 to move toward the positioning ring 3052, thereby squeezing the connecting rod 3054 on both sides to flip upward, thereby driving the expansion plate 3055 away from the support shaft 3051, realizing the resistance support to the inside of the reel, so as to make the reel and the support shaft 3051 rotate synchronously, and the electric control can fix the support and release the reel, without the need for manual fixation of the reel, thereby increasing the convenience of the device.

[0044] like Figure 5As shown, in some embodiments, a slide rail 5011 is installed on the cross bar 501 along its length direction, a screw rod 5012 is rotatably installed inside the cross bar 501, an n-type plate 5013 that slides through the cross bar 501 is threadedly sleeved on the screw rod 5012, and a rotating motor 5014 for driving the screw rod 5012 to rotate is fixedly connected to the connecting frame 101, and the pushing block 502 is installed on the n-type plate 5013. The rotating motor 5014 can drive the screw rod 5012 to rotate, so that the n-type plate 5013 and the screw rod 5012 are threadedly matched, thereby realizing the horizontal reciprocating movement of the pushing block 502 and the hook rod 503.

[0045] like Figure 5-Figure 6 As shown, in some embodiments, a plurality of positioning bars 6 are arranged in an array along the circumference of the support shaft 3051, and the positioning bars 6 are arranged on the side of one of the positioning rings 3052. A push groove 601 is constructed between the positioning bars 6. The push block 502 includes a moving block 5021 slidably mounted on the n-type plate 5013, and a column 5022 is constructed on the moving block 5021 and plugged into one side of the push groove 601. A positioning bolt 5023 is installed on the moving block 5021 through a thread and abuts against the n-type plate 5013. The positioning stop rod 6 is provided to locate the position of the roll after insertion, thereby ensuring the accuracy of winding. At the same time, it is also convenient for the column rod 5022 to pass over the positioning stop rod 6 and abut against the end of the roll to push it, so as to facilitate the replacement of the roll. It should be noted that the moving block 5021 is slidably set on the n-type plate 5013 through the positioning bolt 5023, which can facilitate the adjustment of the position of the column rod 5022, so as to facilitate the edge abutment of the roll that is wound to different degrees, ensure that the roll is pushed out, and increase the flexibility of the device.

[0046] like Figure 5 As shown, in some embodiments, the hook rod 503 includes an extension rod 5031 constructed on the moving block 5021 along the length direction of the cross bar 501, the extension rod 5031 is arranged on the horizontal side of the expansion splicing roller 305, and the end of the extension rod 5031 is constructed with an L-shaped hanging block 5032 arranged toward the expansion splicing roller 305. It should be noted that the extension rod 5031 is made of elastic material, such as a PVC pipe, which can produce elastic deformation. The end of the L-shaped hanging block 5032 passes over the reel and is located on its inner side. When the L-shaped hanging block 5032 moves toward the arc-shaped flip frame 403, it will resist the arc-shaped flip frame 403 to flip until the L-shaped hanging block 5032 passes over the end of the reel in the arc-shaped flip frame 403. At this time, the elastic extension rod 5031 will drive the L-shaped hanging block 5032 to enter the inner side of the reel, so as to hook the reel back to the expansion splicing roller 305, thereby realizing the loading operation of the reel.

[0047] like Figure 7-Figure 8As shown, in some embodiments, the arc-shaped flip frame 403 includes a rolling frame 4031, and a telescopic bracket 4032 is hinged on one side of the rolling frame 4031. A receiving frame 4033 is hinged on the telescopic bracket 4032 through a torsion spring. The torsion spring is provided to enable the receiving frame 4033 to automatically reset after being flipped. It should be noted that the rolling direction of the rolling frame 4031 is perpendicular to the moving direction of the conveyor belt 402. The reel will be transported into the rolling frame 4031 along the conveyor belt 402. At this time, the overall inclination of the installation frame 401 can be used to move the reel through the rolling frame 4031 to the receiving frame 4033, which is convenient for the subsequent hooking operation of the hook rod 503.

[0048] like Figure 7-Figure 8 As shown, in some embodiments, the rolling frame 4031 includes a plurality of rotating tubes 40311, and the plurality of rotating tubes 40311 are arranged in an array at one end of the conveyor belt 402 and are arranged flush with the conveyor belt 402. The rotating tubes 40311 are arranged in connection with the bottom opening of the receiving frame 4033, and a baffle 40331 is configured on the top of the receiving frame 4033. A side plate 40332 for resisting the hook rod 503 is configured on the side of the receiving frame 4033. The baffle 40331 configured on the top of the receiving frame 4033 is mainly used to resist the end of the roll to prevent it from sliding out, and an anti-slip rubber layer is also provided on the concave side of the receiving frame 4033 to prevent In order to prevent the reel from sliding out easily, it is necessary to use the hook rod 503 to pull it out. The side plate 40332 is arranged on the side of the receiving frame 4033, which is mainly used to expand the contact surface with the hook rod 503, so that the hook rod 503 can push it to flip it to a horizontal state, thereby opening the space above it, making it convenient for the old reel to be detached from the expansion splicing roller 305, and then the telescopic bracket 4032 is lifted to make the receiving frame 4033 located below rise to the hook rod 503, so that the hook rod 503 can hook the end of the reel and pull it back to the expansion splicing roller 305, thereby realizing the operation of automatically replacing the reel and increasing the convenience of the equipment.

[0049] like Figure 8 As shown, in some embodiments, the telescopic bracket 4032 includes a vertical frame 40321 fixedly connected to one side of the installation frame 401, and a movable frame 40322 is slidably inserted on the vertical frame 40321. An electric push rod 40324 is connected between the vertical frame 40321 and the movable frame 40322. The middle part of the receiving frame 4033 is hinged to the top of the movable frame 40322, and a support block 40323 for limiting the flipping angle of the receiving frame 4033 is constructed on one side of the top of the movable frame 40322. The electric push rod 40324 can be used to drive the movable frame 40322 to rise and fall, so as to change the height of the receiving frame 4033 after flipping to the horizontal, so as to facilitate the smooth operation of the equipment, and the support block 40323 is provided to limit the flipping of the receiving frame 4033 to ensure that it will not flip excessively and cause the reel to fall, thereby increasing safety.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A winding device for PET film production, characterized in that: include: A support frame (1) comprising a connecting frame (101) and a bearing frame (102) which are arranged parallel to each other, wherein a conveying roller group (2) is rotatably mounted between the connecting frame (101) and the bearing frame (102); The winding assembly (3) comprises a turning shaft (301) rotatably mounted on a connecting frame (101), a reduction motor (302) being fixedly connected to the connecting frame (101) for driving the turning shaft (301) to rotate, a turning plate (303) being fixedly connected to the turning shaft (301), bearing seats (304) being fixedly connected to both ends of the turning plate (303), and an expansion splicing roller (305) for sleeve-engaging a supporting reel being rotatably mounted on the bearing seat (304); A feeding mechanism (4) comprises a mounting frame (401) obliquely mounted on one side of the carrier frame (102), a conveyor belt (402) being arranged in the mounting frame (401), and an arc-shaped turning frame (403) located at the end of the conveyor belt (402) and used for receiving the reel being arranged at one end of the mounting frame (401); The pushing assembly (5) comprises a cross bar (501) fixedly connected between the connecting frame (101) and the supporting frame (102), a pushing block (502) for contacting one end of the reel being slidably mounted on the cross bar (501), and a hook rod (503) arranged along the length direction of the cross bar (501) being fixedly connected to the pushing block (502); The conveying roller group (2) comprises a tensioning roller (201), a conveying roller (202) and an auxiliary roller (203) which are rotatably mounted between a connecting frame (101) and a supporting frame (102); the tensioning roller (201), the conveying roller (202) and the auxiliary roller (203) are arranged in a triangle and a PET film is wound thereon; a driving motor (204) for driving the conveying roller (202) to rotate is mounted on the supporting frame (102); The tensioning roller (201) comprises a fixed shaft (2011) rotatably mounted between the connecting frame (101) and the supporting frame (102); two flipping rods (2012) are hingedly mounted on the fixed shaft (2011); a lifting shaft (2013) is rotatably mounted between the ends of the two flipping rods (2012); a cylinder push rod (2014) is hingedly mounted on both the connecting frame (101) and the supporting frame (102); and the movable ends of the two cylinder push rods (2014) are respectively hingedly mounted at the middle of the two flipping rods (2012); The expansion splicing roller (305) comprises a support shaft (3051) rotatably mounted on a bearing seat (304); two positioning rings (3052) are fixedly sleeved on the support shaft (3051) and two moving rings (3053) are slidably sleeved on the support shaft (3051); the positioning rings (3052) and the moving rings (3053) are arranged opposite to each other in pairs and are symmetrically distributed on the support shaft (3051); a plurality of connecting rods (3054) are hingedly connected along their circumferences on the opposing surfaces of the positioning rings (3052) and the moving rings (3053); expansion plates (3055) located between the positioning rings (3052) and the moving rings (3053) are hingedly connected between the connecting rods (3054); and an iron ring block (3056) and an annular electromagnet (3057) sleeved on the support shaft (3051) are respectively connected to the opposing surfaces of the positioning rings (3052) and the moving rings (3053); A slide rail (5011) is installed on the crossbar (501) along its length direction, a screw rod (5012) is rotatably installed in the crossbar (501), an n-type plate (5013) that slides through the crossbar (501) is threadedly sleeved on the screw rod (5012), a rotating motor (5014) for driving the screw rod (5012) to rotate is fixedly connected to the connecting frame (101), and the pushing block (502) is installed on the n-type plate (5013); The support shaft (3051) is provided with a plurality of positioning bars (6) in an array along its circumference, the positioning bars (6) being arranged on the side of one of the positioning rings (3052), and push grooves (601) being arranged between two of the positioning bars (6); the pushing block (502) comprises a moving block (5021) slidably mounted on the n-type plate (5013), the moving block (5021) being provided with a column (5022) plugged into one side of the push groove (601), and a positioning bolt (5023) being threadedly penetrated and installed on the moving block (5021) and abutting against the n-type plate (5013); The hook rod (503) comprises an extension rod (5031) constructed on the moving block (5021) along the length direction of the crossbar (501), the extension rod (5031) being arranged on the horizontal side of the expansion splicing roller (305), and an L-shaped hanging block (5032) being arranged toward the expansion splicing roller (305) at the end of the extension rod (5031); The arc-shaped flip frame (403) comprises a rolling frame (4031), a telescopic bracket (4032) is hingedly connected to one side of the rolling frame (4031), and a receiving frame (4033) is hingedly connected to the telescopic bracket (4032) via a torsion spring; The rolling frame (4031) comprises a plurality of rotating tubes (40311), the plurality of rotating tubes (40311) being arranged in an array at one end of the conveyor belt (402) and being arranged flush with the conveyor belt (402), the rotating tubes (40311) being arranged in connection with the bottom opening of the receiving frame (4033), the top of the receiving frame (4033) being provided with a baffle plate (40331), and the side of the receiving frame (4033) being provided with a side plate (40332) for resisting the hook rod (503).

2. A winding device for PET film production according to claim 1, characterized in that: The telescopic bracket (4032) comprises a vertical frame (40321) fixedly connected to one side of the installation frame (401); a movable frame (40322) is slidably inserted on the vertical frame (40321); an electric push rod (40324) is connected between the vertical frame (40321) and the movable frame (40322); the middle part of the receiving frame (4033) is hinged to the top of the movable frame (40322); and a support block (40323) for limiting the flipping angle of the receiving frame (4033) is constructed on one side of the top of the movable frame (40322).

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