Unreeling device of film splitting machine

Abstract

The utility model discloses an unwinding device of a film splitting machine, which relates to the technical field of film processing and comprises a support. The two supports can be connected to the support in a sliding mode in the left-right direction; the two unwinding rollers are both parallel to the left-right direction and are coaxially arranged, one ends of the two unwinding rollers can be rotationally connected to the two supports respectively, and the two unwinding rollers are both used for being sleeved with film material rolls; the two positioning blocks are respectively arranged on the two unwinding rollers; and the linear driving mechanism is used for driving the two supports to get close to each other or get away from each other, so that the two positioning blocks can abut against the two ends of the film material roll correspondingly. According to the unwinding device of the thin film splitting machine, the two unwinding rollers and the two positioning blocks are driven to be close to each other, so that a thin film material roll can be quickly centered, the centring efficiency of the thin film material roll is improved, and then the splitting efficiency of the thin film splitting machine is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of film processing, in particular to an unwinding device for a film slitting machine. Background Art

[0002] Film slitting machine is a kind of equipment used to cut large rolls of film materials (such as plastic film, aluminum foil, paper, etc.) into smaller rolls. It is widely used in packaging, printing, electronics, textile and coating industries. The process of putting the film roll into the unwinding roller on the film slitting machine is relatively cumbersome. The operator needs to first lift the film roll to the vicinity of the film slitting machine by means of transportation or manual handling, then remove one end of the unwinding roller from the film slitting machine, put the film roll on the unwinding roller, and then reinstall one end of the unwinding roller on the film slitting machine. After the film roll is put on the unwinding roller, the operator needs to adjust the position of the film roll on the unwinding roller so that the film roll is in the middle of the unwinding roller, that is, the film roll is in the middle of the film slitting machine, so as to ensure that the film roll can be smoothly and accurately unfolded and conveyed during the slitting process to avoid deviation, wrinkles or other problems. The operator will first make a preliminary manual adjustment to the position of the film roll so that the film is roughly in the middle of the unwinding roller, and then use a ruler to measure the distance from the edge of the film roll to one end of the unwinding roller, while adjusting the position of the film roll so that the distances from the two ends of the film roll to the two ends of the unwinding roller are equal, which means that the film roll is in the middle of the unwinding roller, so as to complete the centering process of the film roll on the unwinding roller. This method of adjusting the position of the film roll by measuring the size is slow, which reduces the centering efficiency of the film roll, causing the film slitting machine to be in a shutdown state for a long time, which is not conducive to improving the slitting efficiency of the film slitting machine. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a film slitting machine unwinding device, which is convenient for completing the centering efficiency of the film roll and is conducive to improving the slitting efficiency of the film slitting machine.

[0004] The film slitting machine unwinding device according to the embodiment of the utility model comprises:

[0005] Bracket;

[0006] Two supports, both of which are slidably connected to the bracket in the left-right direction;

[0007] Two unwinding rollers, both of which are parallel to the left and right directions, are coaxially arranged, one end of each of the two unwinding rollers is rotatably connected to each of the two supports, and are used to roll the two ends of the film material;

[0008] Two positioning blocks, the two positioning blocks are respectively arranged on two end surfaces of the two unwinding rollers;

[0009] A linear drive mechanism is used to drive the two supports to move closer to or away from each other, so that the two positioning blocks can respectively abut against the two ends of the film roll.

[0010] At least the following beneficial effects are achieved:

[0011] When the film roll needs to be put on two unwinding rollers, the linear drive mechanism drives the two supports to move away from each other, so that the two unwinding rollers move away from each other, and the positioning blocks on the two unwinding rollers move away from each other, and then the operator can put the film roll on any one of the unwinding rollers. After the film roll is put on one of the unwinding rollers, the linear drive mechanism drives the two supports to move closer to each other, so that the two unwinding rollers move closer to each other, and the film roll moves closer to the other unwinding roller under the drive of one of the unwinding rollers. Since the two unwinding rollers are coaxially arranged, as the two unwinding rollers gradually approach each other, the film roll put on one of the unwinding rollers can be put on the other unwinding roller. The linear drive mechanism continues to drive the two supports to move closer to each other, so that the positioning blocks on the two unwinding rollers can abut against the two ends of the film roll. The two positioning blocks play a positioning role on the film roll, and because the two positioning blocks are close to each other and abut against the two ends of the film roll, under the positioning effect of the two positioning blocks, the film roll can be quickly and accurately located in the middle of the two unwinding rollers, that is, the film roll can be quickly and accurately located in the middle of the film slitting machine. The film slitting machine unwinding device drives the two unwinding rollers and the two positioning blocks close to each other, so that the two ends of the film roll can quickly abut against the two positioning blocks, thereby allowing the film roll to quickly complete the centering, improving the centering efficiency of the film roll, and thus helping to improve the slitting efficiency of the film slitting machine.

[0012] According to the unwinding device of the film slitting machine in the embodiment of the utility model, the unwinding roller is an expansion and contraction roller.

[0013] According to the unwinding device of the film slitting machine according to the embodiment of the utility model, it also includes a mounting frame and a traction roller, the traction roller is arranged above the two unwinding rollers, the traction roller is parallel to the left and right directions, the left and right ends of the traction roller are rotatably connected to the bracket, the traction roller is used for winding the unrolled film material, the two supports are slidably connected to the mounting frame along the left and right directions, and the left and right ends of the mounting frame are rotatably connected to the bracket so that the two unwinding rollers can approach or move away from the traction rollers.

[0014] According to the unwinding device of the film slitting machine of the embodiment of the utility model, it also includes a swing cylinder, the cylinder body of the swing cylinder is hinged to the bracket, the piston rod of the swing cylinder is hinged to the mounting frame, and the swing cylinder is used to drive the mounting frame to rotate.

[0015] According to the unwinding device of the film slitting machine embodiment of the utility model, it also includes a slide rail and two sliding blocks, the slide rail is parallel to the left and right directions, the slide rail is arranged on the mounting frame, the two sliding blocks are respectively arranged on the two supports, and the two sliding blocks are respectively slidably connected to the slide rail.

[0016] According to the film slitting machine unwinding device of the embodiment of the utility model, the linear drive mechanism includes two first nuts, two first screws and two first motors, the two first motors are respectively arranged at the left and right ends of the mounting frame, the two first screws are parallel to the left and right directions, one ends of the two first screws are rotatably connected to the mounting frame, the other ends of the two first screws are respectively connected to the output ends of the two first motors, the two first nuts are respectively arranged on the two supports, and the two first nuts are respectively threadedly connected to the two first screws.

[0017] According to the unwinding device of the film slitting machine according to the embodiment of the utility model, it also includes two fixing components, and the two fixing components are respectively used to fix the two supports on the mounting frame.

[0018] According to the film slitting machine unwinding device of the embodiment of the utility model, the fixing component includes a clamping handle, a threaded hole is opened on the support, a through hole is opened on the slider, the threaded end of the clamping handle is inserted into the threaded hole and the through hole, and the threaded end of the clamping handle is threadedly connected to the inner wall of the threaded hole so that the threaded end of the clamping handle can be pressed against the mounting frame.

[0019] According to the unwinding device of the film slitting machine embodiment of the utility model, it also includes a loading arc plate and a lifting drive mechanism. The loading arc plate is arranged below the two unwinding rollers, and the upper arc surface of the loading arc plate is used to support the film roll. The lifting drive mechanism is used to drive the loading arc plate to rise or fall so that the axis of the film roll on the loading arc plate can coincide with the axis of the two unwinding rollers.

[0020] According to the unwinding device of the film slitting machine according to the embodiment of the utility model, it also includes a second motor, which is arranged on one of the supports, and the output end of the second motor is connected to one of the unwinding rollers, and the second motor is used to drive one of the unwinding rollers to rotate.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a structural schematic diagram of an unwinding device of a film slitting machine according to an embodiment of the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0025] Figure 3 for Figure 1 A schematic diagram of the local enlarged structure at B in the middle;

[0026] Figure 4 for Figure 1 A schematic diagram of the local enlarged structure at C in the middle;

[0027] Figure 5 This is a schematic structural diagram of a mounting frame, a support and an unwinding roller in an unwinding device of a film slitting machine according to an embodiment of the utility model;

[0028] Reference numerals:

[0029] Bracket 100; support 110; slider 111; clamping handle 112; unwinding roller 120; positioning block 121; mounting frame 130; traction roller 140; swing cylinder 150; slide rail 160; feeding arc plate 170; second motor 180;

[0030] Linear drive mechanism 200; first nut 210; first screw rod 220; first motor 230;

[0031] Lifting drive mechanism 300 ; hand wheel 310 ; second screw rod 320 ; second nut 330 . DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of 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 therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] refer to Figure 1 and Figure 5 According to the film slitting machine unwinding device of the utility model, the film slitting machine unwinding device comprises:

[0037] Bracket 100;

[0038] Two supports 110, both of which are slidably connected to the bracket 100 along the left-right direction;

[0039] Two unwinding rollers 120, both of which are parallel to the left and right directions, are coaxially arranged, one end of the two unwinding rollers 120 is rotatably connected to the two supports 110, and the two unwinding rollers 120 are respectively used to sleeve the two ends of the film roll;

[0040] Two positioning blocks 121, the two positioning blocks 121 are respectively arranged on the two unwinding rollers 120;

[0041] The linear drive mechanism 200 is used to drive the two supports 110 to move closer to each other or farther away from each other, so that the two positioning blocks 121 can respectively abut against the two ends of the film roll.

[0042] It is understandable that when the film roll needs to be put on the two unwinding rollers 120, the linear drive mechanism 200 drives the two supports 110 to move away from each other, so that the two unwinding rollers 120 move away from each other, and the positioning blocks 121 on the two unwinding rollers 120 move away from each other, and then the operator can put the film roll on any one of the unwinding rollers 120. After the film roll is put on one of the unwinding rollers 120, the linear drive mechanism 200 drives the two supports 110 to move closer to each other, so that the two unwinding rollers 120 move closer to each other, and the film roll is driven by one of the unwinding rollers 120 to move closer to the other unwinding roller 120. Since the two unwinding rollers 120 are coaxially arranged, as the two unwinding rollers 120 gradually approach each other, the film roll put on one of the unwinding rollers 120 can be put on the other unwinding roller 120. The linear drive mechanism 200 continues to drive the two supports 110 closer to each other, so that the positioning blocks 121 on the two unwinding rollers 120 can abut against the two ends of the film roll. The two positioning blocks 121 play a positioning role on the film roll, and because the two positioning blocks 121 are close to each other and abut against the two ends of the film roll, under the positioning effect of the two positioning blocks 121, the film roll can be quickly and accurately located in the middle of the two unwinding rollers 120, that is, the film roll can be quickly and accurately located in the middle of the film slitting machine. The film slitting machine unwinding device drives the two unwinding rollers 120 and the two positioning blocks 121 closer to each other, so that the two ends of the film roll can quickly abut against the two positioning blocks 121, thereby allowing the film roll to quickly complete the centering, thereby improving the centering efficiency of the film roll, and thereby helping to improve the slitting efficiency of the film slitting machine.

[0043] As an embodiment of the present invention, the unwinding roller is an expansion and contraction roller. It should be explained that the film slitting machine unwinding device of the embodiment of the present invention is applied to the film slitting machine. The expansion and contraction roller is a roller whose diameter is adjusted by a mechanical or hydraulic device. The expansion and contraction roller can change its size as needed in different working stages to adapt to film rolls with different through-hole diameters. Specifically, when the film roll needs to be put on two expansion and contraction rollers, the linear drive mechanism 200 drives the two supports 110 away from each other, so that the two expansion and contraction rollers move away from each other and the two expansion and contraction rollers shrink. Then the operator can put the film roll on any one of the expansion and contraction rollers. After the film roll is put on one of the expansion and contraction rollers, the linear drive mechanism 200 drives the two supports 110 to move closer to each other, and the film roll put on one of the expansion and contraction rollers can be put on the other expansion and contraction roller. The linear drive mechanism 200 continues to drive the two supports 110 closer to each other, so that the positioning blocks 121 on the two expansion and contraction rollers can abut against the two ends of the film roll, so that the film roll can be quickly and accurately located in the middle of the two expansion and contraction rollers, that is, the film roll can be quickly and accurately located in the middle of the film slitting machine. Finally, the two expansion and contraction rollers expand, so that the film roll is fixed on the two expansion and contraction rollers.

[0044] refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 The film slitting machine unwinding device further includes a mounting frame 130 and a traction roller 140. The traction roller 140 is arranged above the two unwinding rollers 120. The traction roller 140 is parallel to the left and right directions. The left and right ends of the traction roller 140 are rotatably connected to the bracket 100. The traction roller 140 is used for winding the unwound film material. The two supports 110 are slidably connected to the mounting frame 130 along the left and right directions. The left and right ends of the mounting frame 130 are rotatably connected to the bracket 100 so that the two unwinding rollers 120 can approach or move away from the traction roller 140. It can be understood that the two unwinding rollers 120 rotate, so that the film material roll mounted on the two unwinding rollers 120 begins to unwind, and the unwound film is wound on the traction roller 140. If the film slitting machine fails, the mounting frame 130 can be rotated, and the rotation of the mounting frame 130 can drive the two supports 110 and the unwinding rollers 120 on the two supports 110 to swing, so that the two unwinding rollers 120 can drive the film roll to swing, and then the two unwinding rollers 120 can drive the film roll to approach the traction roller 140. When the film roll approaches the traction roller 140, the tension of the film unwound from the film roll will decrease rapidly, and the operator can remove the unwound film from the film slitting machine at this time, so that the operator can inspect and maintain the faulty film slitting machine.

[0045] refer to Figure 1 and Figure 2The film slitting machine unwinding device further includes a swing cylinder 150, the cylinder body of the swing cylinder 150 is hinged to the bracket 100, the piston rod of the swing cylinder 150 is hinged to the mounting frame 130, and the swing cylinder 150 is used to drive the mounting frame 130 to rotate. Specifically, the piston rod of the swing cylinder 150 is hinged to a region away from the rotation axis of the mounting frame 130. It can be understood that when the piston rod of the swing cylinder 150 contracts, the piston rod of the swing cylinder 150 drives the mounting frame 130 to rotate, and the mounting frame 130 drives the two supports 110 and the two unwinding rollers 120 to swing, so that the two unwinding rollers 120 are close to the traction roller 140, and at this time, the two unwinding rollers 120 are in the first working position. When the piston rod of the swing cylinder 150 extends, the piston rod of the swing cylinder 150 drives the mounting frame 130 to rotate, and the mounting frame 130 drives the two supports 110 and the two unwinding rollers 120 to swing, so that the two unwinding rollers 120 are away from the traction roller 140. At this time, the two unwinding rollers 120 are in the second position. It needs to be explained that when the two unwinding rollers 120 are in the first position, the tension of the unwinding film is small at this time, which is suitable for removing the unwinding film from the traction roller 140 and the film slitting machine. When the two unwinding rollers 120 are in the second position, the unwinding device of the film slitting machine is in a state of waiting to set the film roll and normal working state. Specifically, the number of the swing cylinders 150 is two, and the cylinder bodies of the two swing cylinders 150 are both hinged to the bracket 100, and the piston rods of the two swing cylinders 150 are respectively hinged to the left and right ends of the mounting frame 130.

[0046] refer to Figure 1 and Figure 3 The film slitting machine unwinding device further includes a slide rail 160 and two sliders 111. The slide rail 160 is parallel to the left and right directions. The slide rail 160 is arranged on the mounting frame 130. The two sliders 111 are respectively arranged on the two supports 110. The two sliders 111 are respectively connected to the slide rail 160 in a slidable manner. It can be understood that the two supports 110 are connected to the slide rail 160 through the sliders 111, so that the two supports 110 can slide in the left and right directions.

[0047] refer to Figure 3 and Figure 5The linear drive mechanism 200 includes two first nuts 210, two first screws 220 and two first motors 230. The two first motors 230 are respectively arranged at the left and right ends of the mounting frame 130. The two first screws 220 are parallel to the left and right directions. One end of the two first screws 220 is rotatably connected to the mounting frame 130. The other ends of the two first screws 220 are respectively connected to the output ends of the two first motors 230. The two first nuts 210 are respectively arranged on the two supports 110. The two first nuts 210 are respectively threadedly connected to the two first screws 220. It can be understood that the two first motors 230 drive the two first screws 220 to rotate respectively. Since the two first nuts 210 are respectively threadedly connected to the two first screws 220, the two first nuts 210 can drive the two supports 110 to move closer to or farther away from each other.

[0048] refer to Figure 1 and Figure 3 The film slitting machine unwinding device further includes two fixing components, which are respectively used to fix the two supports 110 on the mounting frame 130. The fixing components include a clamping handle 112, a threaded hole is provided on the support 110, a through hole is provided on the slider 111, and the threaded end of the clamping handle 112 is inserted into the threaded hole and the through hole, and the threaded end of the clamping handle 112 is threadedly connected to the inner wall of the threaded hole, so that the threaded end of the clamping handle 112 can be pressed against the mounting frame 130. It can be understood that by tightening the clamping handle 112, the threaded end of the clamping handle 112 can be pressed against the mounting frame 130, thereby increasing the force between the slider 111 and the slide rail 160, making it impossible for the slider 111 to slide on the slide rail 160, thereby fixing the support 110 on the mounting frame 130, thereby preventing the support 110 from shaking due to the thread gap of the first screw 220, and thereby preventing the unwinding roller 120 from shaking during the unwinding process, which is beneficial to improving the slitting accuracy of the film slitting machine.

[0049] refer to Figure 1 and Figure 4The film slitting machine unwinding device further comprises a loading arc plate 170 and a lifting drive mechanism 300. The loading arc plate 170 is arranged below the two unwinding rollers 120. The upper arc surface of the loading arc plate 170 is used to support the film roll to abut against the loading arc plate 170. The lifting drive mechanism 300 is used to drive the loading arc plate 170 to rise or fall so that the axis of the film roll on the loading arc plate 170 can coincide with the axis of the two unwinding rollers 120. Specifically, the upper arc surface layer is concave. It is understandable that when the film roll needs to be put on the two unwinding rollers 120, the operator can place the film roll on the loading arc plate 170 by means of transportation tools or manual handling, and then the operator can control the lifting drive mechanism 300 to control the loading arc plate 170 to rise or fall, so that the axis of the film roll on the loading arc plate 170 can coincide with the axis of the two unwinding rollers 120, and then the linear drive mechanism 200 drives the two supports 110 to approach each other, so that the film roll can be quickly put on one of the unwinding rollers 120. The loading arc plate 170 and the lifting drive mechanism 300 play an auxiliary role, so that the through holes on the film roll can be quickly aligned with the two unwinding rollers 120, which increases the speed of the film roll being put on any one of the unwinding rollers 120, and thus helps to improve the centering efficiency of the film roll. In the present invention, when the two unwinding rollers 120 are in the second station, the axis of the film roll can be made to coincide with the axis of the two unwinding rollers 120 by moving the loading arc plate 170 up and down.

[0050] As an embodiment of the utility model, the lifting drive mechanism 300 includes two second screws 320, two second nuts 330 and two hand wheels 310. The left and right ends of the loading arc plate 170 can be connected to the bracket 100 by sliding up and down. The two second screws 320 are parallel to the up and down directions. The lower ends of the two second screws 320 can be rotatably connected to the bracket 100. The two second nuts 330 are respectively arranged on the left and right ends of the loading arc plate 170. The two second nuts 330 are respectively threadedly connected to the two second screws 320, and the two hand wheels 310 are respectively connected to the upper ends of the two second screws 320. It can be understood that the operator can rotate the two second screws 320 by turning the two hand wheels 310. Because the two second screws 320 are respectively threadedly connected to the two second nuts 330, the two second nuts 330 can drive the loading arc plate 170 to move up and down on the bracket 100, thereby enabling the loading arc plate 170 to drive the film roll to move up and down.

[0051] refer to Figure 1 and Figure 5The film slitting machine unwinding device also includes a second motor 180, which is arranged on one of the supports 110. The output end of the second motor 180 is connected to one of the unwinding rollers 120, and the second motor 180 is used to drive one of the unwinding rollers 120 to rotate. It can be understood that the linear drive mechanism 200 continues to drive the two supports 110 to approach each other, so that the positioning blocks 121 on the two expansion and contraction rollers can abut against the two ends of the film roll, and then the two expansion and contraction rollers expand, so that the film roll is fixed on the two expansion and contraction rollers. Then the second motor 180 drives one of the expansion and contraction rollers to rotate, and one of the expansion and contraction rollers can drive the film roll and the other expansion and contraction roller to rotate together, thereby unwinding the film roll.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A film slitting machine unwinding device, characterized in that: include: Bracket; Two supports, both of which are slidably connected to the bracket in the left-right direction; Two unwinding rollers, both of which are parallel to the left and right directions, are coaxially arranged, one end of each of the two unwinding rollers is rotatably connected to each of the two supports, and are used to sleeve the two ends of the film roll; Two positioning blocks, the two positioning blocks are respectively arranged on the two unwinding rollers; A linear drive mechanism is used to drive the two supports to move closer to or away from each other, so that the two positioning blocks can respectively abut against the two end surfaces of the film roll.

2. The film slitting machine unwinding device according to claim 1, characterized in that: The unwinding roller is an expansion and contraction roller.

3. The film slitting machine unwinding device according to claim 1, characterized in that: It also includes a mounting frame and a traction roller, wherein the traction roller is arranged above the two unwinding rollers, the traction roller is parallel to the left and right directions, the left and right ends of the traction roller are rotatably connected to the bracket, the traction roller is used for winding the unwound film material, the two supports are slidably connected to the mounting frame along the left and right directions, and the left and right ends of the mounting frame are rotatably connected to the bracket so that the two unwinding rollers can approach or move away from the traction roller.

4. The film slitting machine unwinding device according to claim 3, characterized in that: It also includes a swing cylinder, a cylinder body of the swing cylinder is hinged to the bracket, a piston rod of the swing cylinder is hinged to the mounting frame, and the swing cylinder is used to drive the mounting frame to rotate.

5. The film slitting machine unwinding device according to claim 3, characterized in that: It also includes a slide rail and two sliding blocks, wherein the slide rail is parallel to the left and right directions, the slide rail is arranged on the mounting frame, the two sliding blocks are respectively arranged on the two supports, and the two sliding blocks are respectively slidably connected to the slide rail.

6. The film slitting machine unwinding device according to claim 5, characterized in that: The linear drive mechanism includes two first nuts, two first screws and two first motors, the two first motors are respectively arranged at the left and right ends of the mounting frame, the two first screws are parallel to the left and right directions, one ends of the two first screws are rotatably connected to the mounting frame, the other ends of the two first screws are respectively connected to the output ends of the two first motors, the two first nuts are respectively arranged on the two supports, and the two first nuts are respectively threadedly connected to the two first screws.

7. The film slitting machine unwinding device according to claim 6, characterized in that: It also includes two fixing components, which are respectively used to fix the two supports on the mounting frame.

8. The film slitting machine unwinding device according to claim 7, characterized in that: The fixing assembly includes a clamping handle, a threaded hole is formed on the support, a through hole is formed on the slider, the threaded end of the clamping handle is inserted into the threaded hole and the through hole, and the threaded end of the clamping handle is threadedly connected to the inner wall of the threaded hole so that the threaded end of the clamping handle can be pressed against the mounting frame.

9. The film slitting machine unwinding device according to claim 1, characterized in that: It also includes a loading arc plate and a lifting drive mechanism, the loading arc plate is arranged below the two unwinding rollers, the upper arc surface of the loading arc plate is used to support the film roll, and the lifting drive mechanism is used to drive the loading arc plate to rise or fall so that the axis of the film roll on the loading arc plate can coincide with the axis of the two unwinding rollers.

10. The film slitting machine unwinding device according to claim 1, characterized in that: It also includes a second motor, which is on one of the supports, and an output end of the second motor is connected to one of the unwinding rollers, and the second motor is used to drive one of the unwinding rollers to rotate.

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