Efficient film cutting and pre-sealing device

Abstract

The utility model discloses an efficient film cutting and pre-sealing device. The device comprises a mounting frame, a film supply module fixed on the mounting frame, a film cutting and pre-sealing mechanism for simultaneously realizing film cutting and pre-sealing actions, a traction module which is arranged on one side of the film cutting and pre-sealing mechanism and is used for guiding a film on the film supply module onto the film cutting and pre-sealing mechanism, and a film collecting module on the other opposite side, the film cutting and pre-sealing mechanism comprises a driving module installed on the installation frame and a supporting frame driven by the driving module to move up and down. The film cutting and pre-sealing module is fixed on the support frame and is used for realizing film cutting and pre-sealing actions; the positioning module is arranged below the film cutting and pre-sealing module and is used for positioning a cup and a film; a plurality of heat sealing heads are arranged on the film cutting and pre-sealing module, and cutters are correspondingly and movably arranged on the peripheries of the heat sealing heads. According to the utility model, the space can be saved, the production efficiency is improved, and the film cutting and pre-sealing quality is improved.

Description

[Technical field]

[0001] The utility model belongs to the technical field of mechanical processing, in particular to a high-efficiency film cutting and pre-sealing device. [Background technology]

[0002] In the production process of cup products, it is necessary to fill the cup with products first, and then seal it with film after filling. The film is usually rolled, so it is necessary to design relevant devices to first unfold the roll, then cut out the film of the size corresponding to the cup mouth and seal it, and finally recycle the remaining film after cutting. In this process, film cutting and heat sealing processes are required. For example, a stable positioning film cutting mechanism disclosed in Chinese patent announcement No. CN212557128U includes a feeding device, a positioning cutting and sealing device and a traction device. The film at the feeding device is pulled by the traction device after passing through the positioning cutting and sealing device. The positioning cutting and sealing device includes a cutting and sealing bracket, a Z-axis lifting component, a cutting and sealing component and a positioning component. The top of the cutting and sealing bracket is provided with a Z-axis lifting component, the lifting part of the Z-axis lifting component is equipped with a cutting and sealing component, and the cutting and sealing bracket below the cutting and sealing component is provided with a positioning component. The film passes through the positioning component; although the mechanism can realize the actions of film cutting and sealing, there are still the following two problems:

[0003] (1) When the cutting and sealing assembly performs the cutting and sealing action, the Z-axis lifting assembly first drives the cutter to move downward to cut the film, and then the film cutting cylinder drives the heat sealing head to move downward to seal. Two driving parts are provided to drive the cutter and the heat sealing head to respectively complete the film cutting and heat sealing actions. The cutting and sealing rhythm is slow, which will reduce the rhythm of the entire filling process, thereby reducing production efficiency; and the two driving parts provided will cause the entire cutting and sealing assembly to occupy a large space;

[0004] (2) The film cutting mechanism is provided with only one cutting and sealing assembly, so only one cup can be cut and sealed during filling, resulting in low production efficiency.

[0005] Therefore, it is necessary to provide an efficient film cutting and pre-sealing device to solve the above technical problems. [Utility Model Content]

[0006] The main purpose of the utility model is to provide a high-efficiency film cutting and pre-sealing device, which can save space, improve production efficiency, and improve the quality of film cutting and pre-sealing.

[0007] The utility model achieves the above-mentioned purpose through the following technical solutions: an efficient film cutting and pre-sealing device, which includes a mounting frame, a film supply module fixed on the mounting frame, a film cutting and pre-sealing mechanism that realizes film cutting and pre-sealing actions at the same time, a traction module arranged on one side of the film cutting and pre-sealing mechanism and used to guide the film on the film supply module to the film cutting and pre-sealing mechanism, and a film receiving module arranged on the other opposite side of the film cutting and pre-sealing mechanism; the film cutting and pre-sealing mechanism includes a driving module mounted on the mounting frame, a supporting frame driven by the driving module to move up and down, a film cutting and pre-sealing module fixed on the supporting frame and used to realize film cutting and pre-sealing actions, and a positioning module arranged below the film cutting and pre-sealing module and used to position the cup and the film; a plurality of heat sealing heads are arranged on the film cutting and pre-sealing module, and cutters are movably arranged on the outer periphery of the heat sealing heads accordingly.

[0008] Furthermore, the support frame includes a first support plate for fixing a plurality of the film cutting pre-sealing modules, a second support plate fixed below the first support plate through a support column, a plurality of vertical guide columns are arranged on the second support plate, a third support plate is arranged at the upper end of the second support plate, the upper end of the guide column is fixed on the third support plate, an avoidance opening for avoiding the film cutting pre-sealing modules is arranged on the second support plate, and an avoidance through hole for avoiding the up and down movement of the first support plate is arranged in the middle of the third support plate.

[0009] Furthermore, the driving module includes a first rotating motor, a driving wheel driven to rotate by the first rotating motor, a first rotating shaft eccentrically fixed on one side of the driving wheel, a connecting rod with one end rotatably set on the first rotating shaft, and a support seat fixed on the first support plate, and the other end of the connecting rod is rotatably set on the support seat through the support shaft.

[0010] Furthermore, the film cutting and pre-sealing module includes a fourth support plate located at the lower end of the second support plate, a plurality of heat sealing heads whose upper ends are fixed to the first support plate and whose lower ends are movably extended to the lower side of the fourth support plate, a plurality of cutters and a plurality of elastic pressing components for pressing the film against the cup mouth are arranged on the lower side of the fourth support plate, the cutters are all movably mounted on the outer periphery of the heat sealing head, and the elastic pressing components are all movably mounted on the outer periphery of the cutters.

[0011] Furthermore, three heat sealing heads are arranged on the first supporting plate, and the three heat sealing heads are arranged in a triangular structure.

[0012] Furthermore, a plurality of hanging rods are fixedly connected to the fourth support plate, and the fourth support plate is movably hung on the second support plate through the hanging rods, and a first spring is sleeved on the outer periphery of the hanging rods; a heat insulation plate is provided on the lower surface of the fourth support plate, and a clamping member avoidance hole for avoiding the elastic clamping assembly is provided on the heat insulation plate.

[0013] Furthermore, the elastic clamping assembly includes a clamping block, a sealing ring arranged at the bottom of the clamping block, a guide screw whose lower end is fixed to the clamping block and whose upper end is arranged on the fourth support plate, and a second spring sleeved on the outer circumference of the guide screw, and the clamping block is provided with a heat sealing head avoidance hole for the heat sealing head to move up and down.

[0014] Furthermore, the positioning module includes a positioning plate fixed at the lower end of the guide column, and the positioning plate includes an avoidance groove arranged on the upper side for the film cutting and pre-sealing module to extend into, a plurality of cup inlet holes arranged on the bottom for the cup to extend into, a film inlet port arranged on the right side and connected with the avoidance groove for the film to enter, and a film outlet port arranged on the left side and connected with the avoidance groove for the film to flow out.

[0015] Furthermore, the positioning plate is provided with guide cross bars for guiding the film at the film inlet and the film outlet, and limit pins for lower limiting the fourth support plate are provided at the front and rear sides of the positioning plate.

[0016] Furthermore, the film supply module includes a second rotating motor fixed on the mounting frame, a second rotating shaft driven by the second rotating motor to rotate, and a roll film fixed on the second rotating shaft; the film collection module includes a third rotating motor fixed on the mounting frame, and a third rotating shaft driven by the third rotating motor to rotate and collect the film.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] (1) A driving module is arranged on the film cutting and pre-sealing mechanism, which includes a first rotating motor. When the first rotating motor drives the driving wheel to rotate, it can drive the connecting rod to move up and down. Both ends of the connecting rod are arranged to rotate, so the connecting rod is always in a vertical state, thereby driving the film cutting and pre-sealing module to move up and down. The eccentric connecting rod structure is arranged to convert the rotary drive into a linear drive. Compared with the linear motor drive mode, it can save space and reduce the space occupied by the entire device; and only one first rotating motor is arranged to drive the heat sealing head, the cutting knife and the elastic pressing component to move up and down at the same time, which can improve the rhythm of the movement and improve the production efficiency;

[0019] (2) Three heat sealing heads are provided, which can complete the film cutting and pre-sealing of three cups at the same time, and the three cups are arranged in a triangular structure, which can further reduce the space occupied by the entire device;

[0020] (3) The film cutting and pre-sealing module is provided with a plurality of elastic pressing components for pressing the film against the mouth of the cup. After the heat sealing head, the cutter and the elastic pressing components move downward, the elastic pressing components can first contact the film and elastically press the film and the mouth of the cup, thereby ensuring the integrity of the cut made by the cutter during cutting and improving the quality of film cutting and pre-sealing.

Brief Description of the Drawings

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the efficient film cutting and pre-sealing device according to an embodiment of the utility model;

[0022] Figure 2 It is a three-dimensional structural schematic diagram of the film cutting and pre-sealing mechanism of the embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the support frame, the film cutting and pre-sealing module and the positioning module of the embodiment of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the support frame and the film cutting and pre-sealing module of the embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the positioning module of an embodiment of the utility model;

[0026] The numbers in the figure represent:

[0027] 100-High-efficiency film cutting and pre-sealing device;

[0028] 1-mounting frame; 2-film supply module, 21-second rotating motor, 22-second rotating shaft, 23-film roll;

[0029] 3-film cutting and pre-sealing mechanism, 31-driving module, 311-first rotating motor, 312-driving wheel, 313-first rotating shaft, 314-connecting rod, 315-support seat, 316-support shaft, 32-support frame, 321-first support plate, 322-support column, 323-second support plate, 324-guide column, 325-third support plate, 326-avoidance through hole, 327-avoidance opening, 328-first linear bearing, 33-film cutting and pre-sealing module, 331-fourth support Plate, 332-heat sealing head, 333-cutter, 334-elastic clamping assembly, 3341-clamping block, 3342-sealing ring, 3343-guide screw, 3344-second spring, 3345-heat sealing head avoidance hole, 335-hanging rod, 337-second linear bearing, 338-heat insulation board, 34-positioning module, 341-positioning plate, 342-avoidance groove, 343-film inlet, 344-film outlet, 345-guide cross bar, 346-limit pin, 347-cup inlet hole;

[0030] 4-traction module, 41-tensioning rod, 42-mounting plate. [Specific implementation method]

[0031] Please refer to Figure 1-Figure 5 The present embodiment is an efficient film cutting and pre-sealing device, which includes a mounting frame 1, a film supply module 2 fixed on the mounting frame 1, a film cutting and pre-sealing mechanism 3 for simultaneously realizing film cutting and pre-sealing actions, a traction module 4 arranged on one side of the film cutting and pre-sealing mechanism 3 and used for guiding the film on the film supply module 2 to the film cutting and pre-sealing mechanism 3, and a film receiving module arranged on the other opposite side of the film cutting and pre-sealing mechanism 3.

[0032] The film cutting and pre-sealing mechanism 3 includes a driving module 31 installed on the mounting frame 1, a supporting frame 32 driven by the driving module 31 to move up and down, a film cutting and pre-sealing module 33 fixed on the supporting frame 32 and used to realize film cutting and pre-sealing actions, and a positioning module 34 arranged below the film cutting and pre-sealing module 33 and used to position the cup and the film.

[0033] The support frame 32 includes a first support plate 321 for fixing a plurality of film cutting and pre-sealing modules 33, and a second support plate 323 fixed below the first support plate 321 through a support column 322. The first support plate 321 and the second support plate 323 are both arranged horizontally. In order to improve the stability of the up and down movement of the support frame 32, a plurality of vertical guide columns 324 are arranged on the second support plate 323. The guide columns 324 are sleeved with a first linear bearing 328 at the position of the second support plate 323. A third support plate 325 is arranged at the upper end of the second support plate 323. The upper end of the guide column 324 is fixed on the third support plate 325. A through hole 326 for avoiding the up and down movement of the first support plate 321 is arranged in the middle of the third support plate 325. A avoidance opening 327 for avoiding the film cutting and pre-sealing module 33 is arranged on the second support plate 323. The first linear bearing 328 is arranged to support and guide the support frame 32 while reducing the friction coefficient, which can improve the accuracy and stability of the movement.

[0034] The driving module 31 includes a first rotary motor 311, a driving wheel 312 driven to rotate by the first rotary motor 311, a first rotary shaft 313 eccentrically fixed to one side of the driving wheel 312, a connecting rod 314 with one end rotatably arranged on the first rotary shaft 313, and a support seat 315 fixed to the first support plate 321, and the other end of the connecting rod 314 is rotatably arranged on the support seat 315 through a support shaft 316. When the first rotary motor drives the driving wheel 312 to rotate, it can drive the connecting rod 314 to move up and down. Both ends of the connecting rod 314 are rotatably arranged, so the connecting rod is always in a vertical state, thereby driving the film cutting and pre-sealing module 33 to move up and down. By setting the eccentric connecting rod structure, the rotary drive can be converted into a linear drive, which can save space compared to the linear motor drive.

[0035] The film cutting and pre-sealing module 33 includes a fourth support plate 331 located at the lower end of the second support plate 323, and a plurality of heat sealing heads 332 whose upper ends are fixed to the first support plate 321 and whose lower ends are movably extended to the lower side of the fourth support plate 331. A plurality of cutters 333 and a plurality of elastic pressing components 334 for pressing the film against the cup mouth are arranged on the lower side of the fourth support plate 331. The cutters 333 are all movably mounted on the outer periphery of the heat sealing heads 332, and the elastic pressing components 334 are all movably mounted on the outer periphery of the cutters 333.

[0036] The fourth support plate 331 is arranged horizontally, and a plurality of hanging rods 335 are fixedly connected to the fourth support plate 331. The fourth support plate 331 is movably hung on the second support plate 323 through the hanging rods 335. The outer periphery of the hanging rods 335 is sleeved with a first spring, and the upper end of the first spring abuts against the second support plate 323, and the lower end abuts against the fourth support plate 331. In order to improve the stability of the up and down movement of the fourth support plate 331, the guide column 324 is sleeved with a second linear bearing 337 at the position of the fourth support plate 331. Since the heat sealing head 332 continuously performs heat sealing action, the bottom temperature of the heat sealing head 332 is relatively high, which may affect the film cutting pre-sealing module 33. Therefore, a heat insulation plate 338 is arranged on the lower surface of the fourth support plate 331, and a compression member avoidance hole for avoiding the elastic compression assembly 334 is arranged on the heat insulation plate 338.

[0037] The elastic clamping assembly 334 includes a clamping block 3341, a sealing ring 3342 arranged at the bottom of the clamping block 3341, a guide screw 3343 whose lower end is fixed to the clamping block 3341 and whose upper end is arranged on the fourth support plate 331, and a second spring 3344 sleeved on the outer periphery of the guide screw 3343. The pressing block 3341 is provided with a heat sealing head avoidance hole 3345 for the heat sealing head 332 to move up and down. The bottom of the pressing block 3341 is provided with a receiving groove for installing the sealing ring 3342. The provided sealing ring 3342 can be used to press the film at the edge of the cup mouth to ensure the integrity of the cutting; the fourth support plate 331 is provided with a threaded hole that cooperates with the guide screw 3343. The guide screw 3343 is tightened upward from the bottom surface of the pressing block 3341 to install the pressing block 3341 on the fourth support plate 331. The lower end of the second spring 3344 abuts against the pressing block 3341 and the upper end abuts against the fourth support plate 331. The provided second spring 3344 can play a buffering role, and the pressing block 3341 can make an elastic floating up and down, so that the sealing ring 3342 can automatically and elastically adapt to the film at the edge of the cup mouth, and can well press the film at the edge of the cup mouth without damaging the film.

[0038] In this embodiment, three heat sealing heads 332 are arranged on the first support plate 321, and the three heat sealing heads 332 are arranged in a triangular structure, which can be adapted to the disc filling machine, and the layout is compact and space-saving. In other embodiments, the number of heat sealing heads 332 can be adjusted according to actual conditions, and is not limited here.

[0039] The positioning module 34 includes a positioning plate 341 fixed at the lower end of the guide column 324. The positioning plate 341 includes an avoidance groove 342 provided on the upper side for the film cutting and pre-sealing module 33 to extend into, a plurality of cup inlet holes 347 provided at the bottom for the cup to extend into, a film inlet 343 provided on the right side and connected to the avoidance groove 342 for the film to enter, and a film outlet 344 provided on the left side and connected to the avoidance groove 342 for the film to flow out. The positioning plate 341 is provided with a guide cross bar 345 for guiding the film at the film inlet 343 and the film outlet 344, and a limit pin 346 for lowering the fourth support plate 331 is provided on the front and rear sides of the positioning plate 341. When the cutter 333 is lowered into place, the fourth support plate 331 is supported against the upper end of the limit pin 346. The widths of the avoidance groove 342, the film inlet 343 and the film outlet 344 are all configured to conform to the width of the film. In this embodiment, three cup inlet holes 347 are provided corresponding to the heat sealing heads 332 .

[0040] The film supply module 2 includes a second rotary motor 21 fixed on the mounting frame 1 , a second rotary shaft 22 driven to rotate by the second rotary motor 21 , and a roll film 23 fixed on the second rotary shaft 22 .

[0041] The traction module 4 includes a plurality of tension rods 41 and a mounting plate 42 on which the tension rods 41 are mounted and fixed on the mounting frame 1, wherein one tension rod 41 is movably mounted on the mounting plate 42, and another tension rod 41 is fixedly mounted on the mounting plate 42. The movably mounted tension rod 41 is mounted in the form of a slider rail and is locked by a locking member. When the position of the tension rod 41 needs to be adjusted, the locking member can be loosened and locked again after the adjustment. The movably mounted tension rod 41 cooperates with the slider rail to flexibly adjust the tension of the film.

[0042] The film collecting module includes a third rotating motor fixed on the mounting frame 1 and a third rotating shaft driven by the third rotating motor to rotate and collect the film.

[0043] When the high-efficiency film cutting and pre-sealing device 100 provided by the present invention is applied, the cup to be sealed is transferred to the bottom of the positioning module 34 through the mold plate (not shown in the figure), and the second rotating motor 21 of the film supply module 2 drives the roll film 23 to rotate, and transfers the uncut film to the inside of the positioning module 34. At the same time, the pushing module (not shown in the figure) below the mold plate (not shown in the figure) pushes the cup upward into the cup inlet hole 347 of the positioning assembly 34 so that the cup mouth contacts the film, and the film cutting and pre-sealing module 33 starts to work. The first rotating motor 311 drives the driving wheel 312 to drive the connecting rod 314 to make the support frame 32 and the fourth supporting plate 331 move downward. At this time, the heat sealing head 332, the cutter 333 and the elastic pressing assembly 334 all move downward. The elastic pressing assembly 334 contacts the film first, so that the elastic pressing assembly 334 is at the bottom at this time, and the first rotating motor 311 continues to drive the elastic pressing assembly 3 34 is elastically pressed downward, and the sealing ring 3342 at the bottom of the pressing block 3341 completely presses the film onto the cup mouth, and at the same time, the lower surface of the fourth support plate 331 is restricted on the limit pin 346, at this time, the cutter 333 contacts the film, and the first rotating motor 311 continues to drive the cutter 333 to move downward to cut the film, and at this time, the heat sealing head 332 is still located above the cup mouth; after the film is cut, the first rotating motor 311 continues to drive the heat sealing head 332 to move downward to contact the film and achieve pre-sealing, at the same time, the fourth support plate 331 is always restricted on the limit pin 346, and the first spring is compressed; after the pre-sealing is completed, the first rotating motor 311 drives the driving wheel 312 to drive the connecting rod 314 to make the support frame 32 and the fourth support plate 331 move upward, so that the heat sealing head 332, the cutter 333 and the elastic pressing assembly 334 all move upward to return to their original positions, waiting for the next film cutting and pre-sealing.

[0044] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An efficient film cutting and pre-sealing device, characterized in that: It includes a mounting frame, a film supply module fixed on the mounting frame, a film cutting and pre-sealing mechanism that realizes film cutting and pre-sealing actions at the same time, a traction module arranged on one side of the film cutting and pre-sealing mechanism and used to guide the film on the film supply module to the film cutting and pre-sealing mechanism, and a film collecting module arranged on the other opposite side of the film cutting and pre-sealing mechanism; the film cutting and pre-sealing mechanism includes a driving module installed on the mounting frame, a supporting frame driven by the driving module to move up and down, a film cutting and pre-sealing module fixed on the supporting frame and used to realize film cutting and pre-sealing actions, and a positioning module arranged below the film cutting and pre-sealing module and used to position the cup and the film; the film cutting and pre-sealing module is provided with a plurality of heat sealing heads, and the outer periphery of the heat sealing heads are correspondingly and movably provided with cutting knives.

2. A high-efficiency film cutting and pre-sealing device as claimed in claim 1, characterized in that: The support frame includes a first support plate for fixing a plurality of the film cutting pre-sealing modules, a second support plate fixed below the first support plate through support columns, a plurality of vertical guide columns are arranged on the second support plate, a third support plate is arranged at the upper end of the second support plate, the upper end of the guide column is fixed to the third support plate, an avoidance opening for avoiding the film cutting pre-sealing modules is arranged on the second support plate, and an avoidance through hole for avoiding the up and down movement of the first support plate is arranged in the middle of the third support plate.

3. A high-efficiency film cutting and pre-sealing device as claimed in claim 2, characterized in that: The driving module includes a first rotating motor, a driving wheel driven to rotate by the first rotating motor, a first rotating shaft eccentrically fixed to one side of the driving wheel, a connecting rod with one end rotatably set on the first rotating shaft, and a support seat fixed on the first support plate, and the other end of the connecting rod is rotatably set on the support seat through the support shaft.

4. A high-efficiency film cutting and pre-sealing device as claimed in claim 2, characterized in that: The film cutting and pre-sealing module includes a fourth support plate located at the lower end of the second support plate, a plurality of heat sealing heads whose upper ends are fixed to the first support plate and whose lower ends are movably extended to the lower side of the fourth support plate, a plurality of cutters and a plurality of elastic pressing components for pressing the film against the cup mouth are arranged on the lower side of the fourth support plate, the cutters are all movably mounted on the outer periphery of the heat sealing head, and the elastic pressing components are all movably mounted on the outer periphery of the cutters.

5. A high-efficiency film cutting and pre-sealing device as claimed in claim 4, characterized in that: Three heat sealing heads are arranged on the first supporting plate, and the three heat sealing heads are arranged in a triangular structure.

6. A high-efficiency film cutting and pre-sealing device as claimed in claim 4, characterized in that: A plurality of hanging rods are fixedly connected to the fourth support plate, and the fourth support plate is movably hung on the second support plate through the hanging rods, and a first spring is sleeved on the outer periphery of the hanging rods; a heat insulation plate is provided on the lower surface of the fourth support plate, and a clamping member avoidance hole for avoiding the elastic clamping assembly is provided on the heat insulation plate.

7. A high-efficiency film cutting and pre-sealing device as claimed in claim 4, characterized in that: The elastic clamping assembly includes a clamping block, a sealing ring arranged at the bottom of the clamping block, a guide screw whose lower end is fixed to the clamping block and whose upper end is arranged on the fourth support plate, and a second spring sleeved on the outer circumference of the guide screw. The clamping block is provided with a heat sealing head avoidance hole for the heat sealing head to move up and down.

8. The high-efficiency film cutting and pre-sealing device according to claim 4, characterized in that: The positioning module includes a positioning plate fixed at the lower end of the guide column, and the positioning plate includes an avoidance groove arranged on the upper side for the film cutting and pre-sealing module to extend into, a plurality of cup inlet holes arranged on the bottom for the cups to extend into, a film inlet port arranged on the right side and connected with the avoidance groove for the film to enter, and a film outlet port arranged on the left side and connected with the avoidance groove for the film to flow out.

9. A high-efficiency film cutting and pre-sealing device as claimed in claim 8, characterized in that: The positioning plate is provided with guide cross bars for guiding the film at the film inlet and the film outlet, and limit pins for lower limiting the fourth support plate are provided at the front and rear sides of the positioning plate.

10. The high-efficiency film cutting and pre-sealing device according to claim 1, characterized in that: The film supply module includes a second rotating motor fixed on the mounting frame, a second rotating shaft driven by the second rotating motor to rotate, and a roll film fixed on the second rotating shaft; the film collection module includes a third rotating motor fixed on the mounting frame, and a third rotating shaft driven by the third rotating motor to rotate and collect the film.

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