CN115258743A

CN115258743A - Film splitter

Info

Publication number: CN115258743A
Application number: CN202210897708.6A
Authority: CN
Inventors: 刘家荣; 曾庆林; 刘方
Original assignee: Changyuan Zehui New Energy Materials Research Institute Zhuhai Co ltd
Current assignee: Changyuan Zehui New Energy Materials Research Institute Zhuhai Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2022-11-01

Abstract

The invention discloses a film splitter, comprising: the sliding table is arranged on the rack in a sliding manner; the unwinding mechanism comprises an unwinding roller, the unwinding roller is rotatably arranged on the sliding table, and the unwinding roller is provided with a film roller; the main traction mechanism comprises a plurality of main traction rollers, and the main traction rollers are used for driving the film to move; the mechanism of rectifying, the mechanism of rectifying is including the installation axle, the sensor and the driver of rectifying, the installation axle parallels and sets up between unwinding mechanism and main drive mechanism with the unwinding roller, the installation axle is connected to the sensor one end of rectifying, the other end sets up towards the film and is used for detecting the skew degree of film, the driver electric connection sensor of rectifying, the driver setting of rectifying is in the frame and is connected the slip table, the driver of rectifying can order about the slip table and slide along the axis direction of unwinding roller. The film splitting machine provided by the embodiment of the invention can finish automatic deviation rectification of the film, ensure the position stability of the film in the splitting and unwinding process and avoid the influence on the splitting precision and effect due to the deviation.

Description

Film splitter

Technical Field

The invention relates to the technical field of coating, in particular to a film splitting machine.

Background

The film slitter is a device for slitting polyester films, aluminum-plated films and other films into different sizes, and is widely applied to packaging and other film-covering industries.

The film splitting machine comprises an unwinding mechanism, a cutting mechanism, a winding mechanism and the like, and the film is driven to move to the cutting mechanism through each functional roller to realize the cutting of the film. In the existing film splitting machine, in the transmission and conveying process of a film, the moving path of the film is deviated due to various nonresistable factors in the transmission process, the position deviation of the film can reduce the splitting precision, and the product is easy to be poor.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the film splitting machine which can ensure the splitting precision of the film.

According to the embodiment of the invention, the film splitter comprises a frame and further comprises: the sliding table is arranged on the rack in a sliding manner; the unwinding mechanism comprises an unwinding roller, the unwinding roller is rotatably arranged on the sliding table, and the unwinding roller is provided with a film roller; the main traction mechanism is arranged on the rack and comprises a plurality of main traction rollers, and the main traction rollers are used for driving the film to move; the mechanism of rectifying, the mechanism of rectifying is including the installation axle, the sensor and the driver of rectifying, the installation axle parallels and sets up between unwinding mechanism and main drive mechanism with the unwinding roller, the installation axle is connected to the sensor one end of rectifying, the other end sets up towards the film and is used for detecting the skew degree of film, the driver electric connection sensor of rectifying, the driver setting of rectifying is in the frame and is connected the slip table, the driver of rectifying can order about the slip table and slide along the axis direction of unwinding roller.

The film splitting machine provided by the embodiment of the invention at least has the following beneficial effects: the film splitting machine provided by the invention has the advantages that the deviation correction sensor is used for detecting the deviation degree of the film, when the position deviation occurs during the unwinding of the film, the deviation correction sensor sends a signal, the deviation correction driver is used for controlling the sliding table to move, so that the axial position of the unwinding roller is adjusted, the effect of eliminating the deviation is realized, the automatic deviation correction can be completed, the position stability during the slitting and unwinding process of the film is ensured, and the slitting precision and the slitting effect are prevented from being influenced due to the deviation.

According to some embodiments of the invention, the first sliding block is arranged at the bottom of the sliding table, the frame is provided with a first guide rail matched with the first sliding block, the arrangement direction of the first guide rail is consistent with that of the unwinding roller, and the first sliding block is connected with the first guide rail in a sliding manner.

According to some embodiments of the invention, the slide table is provided with a plurality of tension rollers for winding the film.

According to some embodiments of the present invention, further comprising a circular knife mechanism disposed at a rear side of the main drawing mechanism along a transport path of the film, the circular knife mechanism comprising: the cutter shaft is rotatably arranged on the rack; the cutter rest is fixed on the frame, and the cutter rest and the cutter shaft are parallel to each other and are arranged above the cutter shaft; and the blade group is arranged on the tool rest and comprises a plurality of blades arranged in parallel, and the blade edges of the blades face the cutter shaft and are perpendicular to the conveying path of the film.

According to some embodiments of the invention, the cutter shaft is provided with a plurality of round bottom cutters in parallel, and a spacer sleeve is arranged between two adjacent groups of round bottom cutters.

According to some embodiments of the invention, the film winding device further comprises at least two groups of winding mechanisms, and all the winding mechanisms comprise slip shafts, and the slip shafts are used for winding the film.

According to some embodiments of the invention, the frame is provided with a second guide rail along a horizontal direction, and the winding mechanism further comprises: the two mounting plates are respectively and symmetrically arranged on two sides of the rack, the mounting plates are provided with second sliding blocks and bearing seats, the second sliding blocks are movably connected with second guide rails, and two ends of the slip shaft are respectively connected with the bearing seats of the two mounting plates; the second driving device is arranged on one mounting plate, and the output end of the second driving device is connected with the slip shaft; and the output end of the gas-liquid converter is connected with the mounting plate and is suitable for driving the mounting plate to move along the second guide rail.

According to some embodiments of the invention, the end of the slip shaft is provided with an air path rotary joint in communication, and the air path rotary joint is connected with an external air supply device.

According to some embodiments of the invention, the winding device further comprises a secondary traction mechanism, the secondary traction mechanism is arranged between the circular knife mechanism and the winding mechanism, the secondary traction mechanism comprises a plurality of secondary traction rollers and a third driving device connected with the secondary traction rollers, and the third driving device is suitable for driving the secondary traction rollers to rotate.

According to some embodiments of the invention, a curved roll is disposed between the main pulling mechanism and the circular knife mechanism.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of the film slitting machine of this embodiment;

FIG. 2 is a schematic view of the overall structure of the film splitter of the present embodiment;

FIG. 3 is a partial schematic view of the film slitting machine of this embodiment;

fig. 4 is a schematic structural view of the winding mechanism in the embodiment;

FIG. 5 is a schematic view of the installation of the deviation rectifying sensor of the present embodiment;

fig. 6 is a schematic structural diagram of the pressing mechanism according to the embodiment.

Reference numerals: a frame 100; a first guide rail 110; a second guide rail 120; a curved roller 130; a slide table 200; a first slider 210; a tension roller 220; a mounting rod 230; an unwinding roller 300; a main pulling roll 400; a deviation rectifying mechanism 500; a mounting shaft 510; a deviation sensor 520; a deviation rectifying driver 530; a circular knife mechanism 600; a knife shaft 610; a round bed knife 611; a spacer 612; a tool holder 620; a blade set 630; a winding mechanism 700; a slip shaft 710; a gas path rotary joint 711; a mounting plate 720; a second slider 730; a bearing seat 740; a second driving device 750; a gas-liquid converter 760; a secondary pull roll 800; a press-fit mechanism 900; a support plate 910; a compression bar 920; a fixing plate 930; a chute 931; vertical guide rails 940; the fourth driving device 950; a synchronizer 960; a synchronizing wheel 970; a tension spring 980.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "lateral", "longitudinal", "vertical", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 4, the present invention discloses a film splitter, which comprises a frame 100, an unwinding mechanism, a deviation rectifying mechanism 500, a main traction mechanism, a circular knife mechanism 600 and a winding mechanism 700, wherein the unwinding mechanism, the main traction mechanism, the circular knife mechanism 600 and the winding mechanism 700 are all sequentially arranged on the frame 100 along a movement path of a film.

Unwinding mechanism adopts driving motor including unreeling roller 300 and first drive arrangement, and unreeling roller 300 and can order about unreeling roller 300 rotatory are connected to its output, unreel and be provided with the film cylinder on the roller 300, realize the roll-out of film through unreeling roller 300's rotation.

The main traction mechanism comprises two groups of main traction rollers 400, the two groups of main traction rollers 400 are rotatably arranged on the rack 100, the main traction rollers 400 are connected with a driving motor used for driving the self to rotate, and after the film is wound out from the unwinding roller 300, the film is wound on a plurality of conveying rollers arranged on the rack 100 and is wound on the main traction rollers 400. The main pulling roll 400 is rotated by a motor and drives the film toward the circular knife mechanism 600 by using a frictional force between itself and the film.

The deviation correcting mechanism 500 comprises a mounting shaft 510, a deviation correcting sensor 520 and a deviation correcting driver 530, wherein the mounting shaft 510 is arranged between the unwinding mechanism and the main traction mechanism, and meanwhile, the mounting shaft 510 is fixed on the frame 100 and is parallel to the unwinding roller 300; the end of the deviation-correcting sensor 520 is provided with a shaft sleeve, the deviation-correcting sensor 520 is arranged on the mounting shaft 510 through the shaft sleeve at the end of the deviation-correcting sensor 520 and is locked and fixed through a bolt piece, the other end of the deviation-correcting sensor 520 is provided with a deviation-correcting probe which is used for sensing the deviation degree of the film, wherein the deviation degree refers to the displacement of the film which deviates along the setting direction of the shaft roller when the film is conveyed under the action of the shaft roller. When the film has a deviation, the deviation rectifying sensor 520 sends a signal to the deviation rectifying driver 530; the deviation correcting driver 530 adopts an electric cylinder, the deviation correcting driver 530 is arranged on the frame 100, the output end of the deviation correcting driver 530 is connected with the sliding table 200, and the deviation correcting driver 530 can drive the sliding table 200 to move along the axial direction of the unwinding roller 300 after receiving the information of the deviation correcting sensor 520, so that the axial position of the unwinding roller is adjusted. Meanwhile, the deviation rectifying sensor 520 of the embodiment can adjust the position of itself on the mounting shaft 510 according to the width of the thin film, thereby ensuring the detection accuracy.

According to the film splitting machine provided by the embodiment of the invention, the deviation degree of the film is detected by the deviation correction sensor, when the position of the unreeled film deviates, the deviation correction sensor sends a signal, the deviation correction driver is used for controlling the sliding table to move, so that the axial position of the unreeling roller is adjusted, the deviation elimination effect is realized, automatic deviation correction can be completed, the position stability of the film in the splitting and unreeling process is ensured, and the splitting precision and effect are prevented from being influenced by the deviation.

Referring to fig. 1, in some embodiments of the present invention, a sliding table 200 is disposed on a rack 100, an unwinding mechanism is disposed on the sliding table 200, a first slider 210 is disposed at the bottom of the sliding table 200, the rack 100 is provided with a first guide rail 110 adapted to the first slider 210, the direction of the first guide rail 110 is the same as that of an unwinding roller 300, the first slider 210 is slidably connected to the first guide rail 110, and the sliding table 200 can slide along the first guide rail 110. In the process of conveying the film, when the position of the film deviates, the axial position of the unwinding roller 300 can be adjusted by adjusting the position of the sliding table 200 on the first guide rail 110, so as to achieve the effect of eliminating the deviation.

Referring to fig. 1, two sets of the first guide rail 110 and the first slider 210 are disposed corresponding to each other, and the two sets of the first guide rail 110 and the first slider 210 can ensure stable assembly of the sliding table 200 on the frame 100 and improve the accuracy of movement.

In some embodiments of the present invention, the sliding table 200 is provided with a plurality of tension rollers 220 for winding the film, and the tension rollers 220 are used for increasing the tension of the film to ensure a stable state when the film is output.

Referring to fig. 1 and 3, in some embodiments of the present invention, a circular knife mechanism 600 is used for cutting the film, wherein the circular knife mechanism 600 is provided with a plurality of cutting knives, and the film moves relative to the cutting knives, so that the cutting knives cut the film along the moving direction of the film, thereby cutting the film into a plurality of strips. Wherein, circular knife mechanism 600 includes: the cutter shaft 610 is rotatably arranged on the frame 100 through a bearing piece, one end of the cutter shaft 610 is connected with a driving motor for driving the cutter shaft 610 to rotate, a plurality of round bottom cutters 611 are arranged on the cutter shaft 610 in parallel, and a spacer 612 is arranged between two adjacent groups of round bottom cutters 611; the tool rest 620 is fixed on the frame 100, and the tool rest 620 and the cutter shaft 610 are parallel to each other and arranged above the cutter shaft 610; the blade group 630 is arranged on the tool rest 620, the blade group 630 comprises a plurality of blades arranged in parallel, the blade edges of the blades are arranged towards the cutter shaft 610, the arrangement direction of the blades is perpendicular to the conveying path of the film, a gap is arranged between the blades and the cutter shaft 610, and the film passes through the gap between the blades and the cutter shaft 610 and is cut under the matching of the round bottom cutter 611 and the cutter.

In more detail, a sliding rail is arranged on the tool rest 620 along the length direction of the tool rest, a sliding part matched with the sliding rail is connected to the upper end of the blade, and the blade is slidably mounted on the sliding rail of the tool rest 620, so that the adjustment of the distance between the blades is realized, and the cutting size of the film is controlled and adjusted.

Referring to fig. 1 and 4, in some embodiments of the present invention, two sets of winding mechanisms 700 are provided, where the winding mechanism 700 includes a slip shaft 710, the slit film is wound around the slip shaft 710 of the winding mechanism 700, a winding drum is correspondingly provided on the slip shaft 710, and the winding drum is driven by the rotation of the slip shaft 710 to wind the film. Meanwhile, the two sets of winding mechanisms 700 are used for winding the films at intervals, and after slitting, two films parallel to each other are respectively wound on the slip shafts 710 of the two sets of winding mechanisms 700.

Referring to fig. 2 and 4, in more detail, the second guide rails 120 are provided at both sides of the rack 100 in the horizontal direction, wherein four sets of the second guide rails 120 are provided at each side of the rack 100, and the winding mechanism 700 further includes: the two mounting plates 720 are symmetrically arranged on two sides of the rack 100 respectively, one side of each mounting plate 720, which faces the rack 100, is provided with a second sliding block 730, meanwhile, each mounting plate 720 is also provided with a yielding hole, a bearing seat 740 is arranged in each yielding hole, the second sliding block 730 is movably connected with the second guide rail 120, and two ends of the slip shaft 710 are connected with the bearing seats 740 of the two mounting plates 720 respectively; a second driving device 750 disposed on one of the mounting plates 720, an output end of the second driving device 750 being connected to the slip shaft 710; and the gas-liquid converter 760 is arranged on the rack 100, and the output end of the gas-liquid converter 760 is connected with the mounting plate 720 and is suitable for driving the mounting plate 720 to move along the second guide rail 120, so that the slip shaft 710 is driven to move, and the slip shaft 710 is enabled to be close to or far away from the circular knife mechanism 600. When the tension of the slip shaft 710 is too large, the movement of the slip shaft 710 can be controlled to ensure that the tension of each slitting end on the slip shaft 710 is smooth.

Referring to fig. 4, an air path rotary joint 711 is arranged at an end portion of the slip shaft 710 in a communicating manner, the air path rotary joint 711 is connected with an external air supply device, and the slip shaft 710 realizes air intake through the air path rotary joint 711 and is used for tensioning the take-up drum.

The slip shaft is an inflatable shaft and consists of a shaft center, a friction assembly and a plurality of groups of slip rings, the friction torque of the slip shaft is controlled by the air pressure of compressed air, each group of slip rings are in an independent slipping state, and the torque is controlled by the central air pressure or the pressure transmitted from the side surface, so that the tension from the inner roll diameter to the outer roll diameter of each roll material is constant and uniform, the end surface is smooth, the constant force is wound, and the material tensioning degree is ensured.

Referring to fig. 1, in some embodiments of the present invention, the present invention further includes an auxiliary traction mechanism, the auxiliary traction mechanism is disposed between the circular knife mechanism 600 and the winding mechanism 700, the auxiliary traction mechanism includes two sets of auxiliary traction rollers 800, both sets of auxiliary traction rollers 800 are connected to a third driving device capable of driving the two sets of auxiliary traction rollers 800 to rotate, the third driving device employs a driving motor, the film is wound on the two auxiliary traction rollers 800 after being cut by the circular knife mechanism 600, and the film is under sufficient tension between the main traction mechanism and the auxiliary traction mechanism due to the action of the main traction mechanism and the auxiliary traction mechanism on the film, so as to straighten the film, ensure the surface of the film to be flat, and facilitate cutting of the film.

Referring to fig. 1 and 3, in some embodiments of the present invention, the curved roller 130 is disposed between the main drawing mechanism and the circular knife mechanism 600, the curved roller 130 is rotatably disposed on the frame 100 through a ball bearing, and a driving motor for driving the curved roller 130 to rotate is connected to an end of the curved roller 130.

Further, referring to fig. 1 and fig. 6, the film splitter of the present invention is further provided with a pressing mechanism 900, the pressing mechanism 900 is disposed between the unwinding roller 300 and the tension roller 220, and the pressing mechanism 900 is used for flattening the film, so as to ensure a smooth surface when the film is output from the film roller.

Referring to fig. 6, the pressing mechanism 900 includes a supporting plate 910, a pressing rod 920, a fixing plate 930, a vertical guide rail 940 and a fourth driving device 950, the supporting plate 910 is horizontally disposed on the sliding table 200, two ends of the supporting plate 910 are fixed to the sliding table 200 through bolts, and an upper surface of the supporting plate 910 can abut against a lower surface of the film; vertical guide rail 940 is along vertical setting on slip table 200 and set up the both sides at the film, there is fixed plate 930 through slider sliding connection on vertical guide rail 940, fixed plate 930 is connected to fourth drive arrangement 950's output and can order to order about fixed plate 930 to do vertical motion, the both ends of depression bar 920 are fixed on fixed plate 930 through bolt spare, the clamp plate is provided with two sets ofly along the horizontal direction side by side, wherein, depression bar 920 is in the top of backup pad 910, under the drive of fourth drive arrangement 950, fixed plate 930 and depression bar 920 can move towards backup pad 910, make depression bar 920 butt upper surface of film, thereby realize flattening to the film.

In this embodiment, the fourth driving device 950 includes a servo motor, a synchronizer 960 is disposed at an output end of the servo motor, a synchronizer 970 is rotatably disposed at an end of the synchronizer 960, and the servo motor can drive the synchronizer 960 to rotate so as to drive the synchronizer 970 to perform a circular motion in a vertical plane. Meanwhile, the fixing plate 930 is provided with a sliding groove 931 along the horizontal direction, the synchronizing wheel 970 is arranged in the sliding groove 931 and can roll along the sliding groove 931, and the circular motion of the synchronizing wheel 970 drives the fixing plate 930 to move vertically, so that the fixing plate 930 and the pressing rod 920 are driven to be close to or far away from the supporting plate 910.

The pressing mechanism 900 further comprises a tension spring 980, the mounting rod 230 is vertically arranged on the sliding table 200, the tension spring 980 is vertically arranged, one end of the tension spring 980 is connected with the fixing plate 930, the other end of the tension spring 980 is connected with the mounting rod 230, and the fixing plate 930 can be driven to move upwards by elastic tension of the tension spring 980. The tension spring 980 has the function of balancing the weight of the fixing plate 930 and the pressure lever 920, so that the output power required when the fixing plate 930 moves upwards is reduced, and the stability of the pressing mechanism 900 in the lifting process is ensured.

In the description herein, references to the description of "some embodiments" mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a film splitter, includes the frame, its characterized in that still includes:

the sliding table is arranged on the rack in a sliding manner;

the unwinding mechanism comprises an unwinding roller, the unwinding roller is rotatably arranged on the sliding table, and the unwinding roller is provided with a film roller;

the main traction mechanism is arranged on the rack and comprises a plurality of main traction rollers, and the main traction rollers are used for driving the film to move;

mechanism of rectifying, the mechanism of rectifying is including installing the axle, the sensor of rectifying and the driver of rectifying, the installation axle with unreel the roller and parallel and set up unreel the mechanism with between the main drive mechanism, the sensor one end of rectifying is connected the installation axle, the degree of deviation that the other end set up towards the film and is used for detecting the film, the driver electric connection of rectifying the sensor of rectifying, the driver of rectifying sets up in the frame and connect the slip table, the driver of rectifying can order about the slip table is followed the axis direction of unreeling the roller slides.

2. The film splitter as claimed in claim 1, wherein a first sliding block is disposed at a bottom of the sliding table, a first guide rail adapted to the first sliding block is disposed on the frame, a direction of the first guide rail is consistent with that of the unwinding roller, and the first sliding block is slidably connected to the first guide rail.

3. The film splitter as claimed in claim 1, wherein a plurality of tension rollers for winding the film are provided on the slide table.

4. The film slitting machine as claimed in claim 1 further comprising a circular knife mechanism disposed along a feed path of the film at a rear side of the main tractor mechanism, the circular knife mechanism comprising:

the cutter shaft is rotatably arranged on the rack;

the cutter frame is fixed on the rack, and the cutter frame and the cutter shaft are parallel to each other and are arranged above the cutter shaft;

the blade group is arranged on the tool rest and comprises a plurality of blades which are arranged in parallel, and the blade edges of the blades face the cutter shaft and are perpendicular to the conveying path of the film.

5. The film splitter as claimed in claim 4, wherein a plurality of circular bed knives are arranged side by side on the knife shaft, and a spacer is arranged between two adjacent groups of circular bed knives.

6. The film slitting machine as claimed in claim 4 further including at least two winding mechanisms, all of which include a slip shaft for winding the film.

7. The film splitter as claimed in claim 6, wherein the frame is provided with a second guide rail along a horizontal direction, and the winding mechanism further comprises:

the two groups of mounting plates are respectively and symmetrically arranged on two sides of the rack, the mounting plates are provided with second sliding blocks and bearing seats, the second sliding blocks are movably connected with the second guide rails, and two ends of the slip shaft are respectively connected with the bearing seats of the two groups of mounting plates;

the second driving device is arranged on one of the mounting plates, and the output end of the second driving device is connected with the slip shaft;

and the output end of the gas-liquid converter is connected with the mounting plate and is suitable for driving the mounting plate to move along the second guide rail.

8. The film splitter as claimed in claim 6, wherein the end of the slip shaft is connected to an air path rotary joint, and the air path rotary joint is connected to an external air supply device.

9. The film splitter as claimed in claim 6, further comprising a secondary pulling mechanism disposed between the circular knife mechanism and the winding mechanism, wherein the secondary pulling mechanism comprises a plurality of secondary pulling rollers and a third driving device connected to the secondary pulling rollers, and the third driving device is adapted to drive the secondary pulling rollers to rotate.

10. The film splitting machine of claim 6, wherein a curved roller is disposed between said main pulling mechanism and said circular knife mechanism.