Plastic film cutting device and cutting method thereof

Abstract

The present invention relates to the technical field of plastic films, and more specifically discloses a plastic film cutting device and a cutting method thereof, comprising a shell, a processing groove is opened on the upper surface of the shell, four support rods are rotatably connected to the upper surface of the shell, the upper ends of the support rods are rotatably connected to a top plate, and a moving mechanism for moving the position is arranged on the side of the shell, and a positioning mechanism is arranged. When it is necessary to fix the plastic film, the motor is started, and the motor drives the power rod to rotate. Since the sliding rod is located inside the sliding groove and the longitudinal sections of both are arranged in a rectangular structure, the power rod drives the transmission rod to rotate, and the electric telescopic rod is started, and the electric telescopic rod drives the sliding plate to drive the transmission rod to move together, so that the bevel gear sets are meshed with each other. Since a reciprocating thread is arranged on the outer wall of the support rod and is threadedly connected to the lifting plate, the rotation of the support rod will drive the lifting plate to move downward, so as to clamp and fix the plastic film.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic films, and more particularly to a plastic film cutting device and a cutting method thereof. Background Art

[0002] In the process of locking plastic film production, the plastic film needs to be cut. A plastic film cutting device is needed to cut the plastic film. The plastic film cutting device is a device that needs to be installed to cut the plastic film in the process of plastic film production. The plastic film cutting device is mainly composed of a shell component, a connecting component, a cutting component, etc. The plastic film cutting device has the advantages of fast cutting speed, good cutting effect, and convenient cutting.

[0003] Common plastic film cutting devices generally have the following defects during use:

[0004] First, before cutting, the common plastic film cutting device directly places the plastic film to be cut into the processing groove without fixing the plastic film. During the cutting process, the position of the plastic film will move, resulting in inaccurate cutting of the plastic film, which is not conducive to cutting.

[0005] Second, common plastic film cutting devices generally use blades to cut plastic films. Since the blades will wear out during the cutting process, the blades will become blunt after a period of cutting. The blades need to be disassembled and replaced, and the operation process is relatively complicated, which is not conducive to cutting.

[0006] Third, when common plastic film cutting devices are cutting, they need to cut at the location of the plastic film. The common material cutting at the location of the plastic film requires manual movement of the cutting knife to cut the plastic film. The whole process requires manual participation, which consumes a lot of manpower.

[0007] In summary, during the use of common plastic film cutting devices, there are generally defects such as the plastic film is not fixed, the blade needs to be disassembled and replaced, and the position of the cutting knife needs to be moved manually in order to cut the plastic film. Summary of the invention

[0008] In order to overcome the above-mentioned defects of the prior art, the present invention provides a plastic film cutting device and a cutting method thereof to solve the problems existing in the above-mentioned background technology.

[0009] The present invention provides the following technical solutions: a plastic film cutting device and a cutting method thereof, comprising a shell, a processing groove is provided on the upper surface of the shell, four support rods are rotatably connected to the upper surface of the shell, the upper ends of the support rods are rotatably connected to a top plate, a moving mechanism for moving a position is provided on the side of the shell, a cutting mechanism for cutting a plastic film is provided inside the processing groove, a positioning mechanism for fixing the plastic film is provided on the upper surface of the shell, and a control mechanism for providing power is provided on the side of the shell;

[0010] The moving mechanism comprises a moving groove formed on the side of the housing, a groove formed on the side wall of the moving groove, a rotating rod rotatably connected to the side wall of the moving groove, a moving block slidably connected to the side wall of the moving groove, the rotating rod is threadedly connected to the moving block, a connecting block is slidably connected inside the groove, the connecting block is fixedly connected to the moving block, and a limiting groove is formed on the other end of the rotating rod;

[0011] Furthermore, the groove is connected to the processing groove, and the longitudinal section of the limiting groove is rectangular.

[0012] Furthermore, the cutting mechanism includes a support plate slidably connected to the side wall of the processing groove, and a plurality of laser emitters are installed on the left and right side walls of the support plate.

[0013] Furthermore, the model of the laser transmitter is YLP-1-100-20-20HC, the length of the support plate is equal to the width of the processing groove, and one end of the connecting block extends to the outside of the groove and is fixedly connected to the support plate.

[0014] Furthermore, the positioning mechanism includes a lifting plate slidably connected to the outer wall of the support rod, and a positioning plate is fixedly connected to the lower surface of the lifting plate.

[0015] Furthermore, a reciprocating thread is provided on the outer wall of one of the support rods and is threadedly connected to one of the lifting plates, and a connecting plate is fixedly connected between the two lifting plates.

[0016] Furthermore, the control mechanism includes a fixed plate fixedly connected to the side of the shell, a support platform is fixedly connected to the upper surface of the fixed plate, a motor is installed on the upper surface of the support platform, a support block is fixedly connected to the upper surface of the fixed plate, a power rod is rotatably connected to the side of the support block, one end of the power rod is fixedly connected to the end of the output shaft of the motor, the other end of the power rod passes through the support block and is provided with a sliding groove, a sliding plate is slidably connected to the upper surface of the fixed plate, an electric telescopic rod is installed on the upper surface of the fixed plate, the telescopic end of the electric telescopic rod is fixedly connected to the sliding plate, a transmission rod is rotatably connected to the side of the sliding plate, one end of the transmission rod is fixedly connected to the sliding rod, and the other end of the transmission rod extends to the inside of the movable groove and is fixedly connected to a limiting rod.

[0017] Furthermore, the sliding rod is located inside the sliding groove, the longitudinal sections of the sliding rod, sliding groove and limiting rod are all rectangular, the lower end of the support rod with a reciprocating thread on the outer wall extends into the movable groove and meshes with the transmission rod through a bevel gear set.

[0018] Further, the specific steps are as follows:

[0019] S1: placing the plastic film to be cut inside the processing tank;

[0020] S2: Start the motor, the motor drives the power rod to rotate, because the sliding rod is located inside the sliding groove and the longitudinal sections of both are rectangular structures, the power rod drives the transmission rod to rotate, start the electric telescopic rod, the electric telescopic rod drives the sliding plate to approach the motor, the sliding plate drives the transmission rod to move together, so that the bevel gear sets are meshed with each other, one end of the limiting rod moves out of the limiting groove, the transmission rod drives a support rod to rotate, because a reciprocating thread is provided on the outer wall of one of the support rods and is threadedly connected to one of the lifting plates, the rotation of the support rod drives one lifting plate to move downward, and a connecting plate is fixedly connected between the two lifting plates, so that the two lifting plates drive the positioning plate to move downward and clamp the plastic film;

[0021] S3: Start the electric telescopic rod, which drives the sliding plate away from the motor, and the sliding plate drives the transmission rod to move together, so that the bevel gear sets are separated from each other, and one end of the limiting rod enters the limiting groove. Since the longitudinal sections of the limiting rod and the limiting groove are both rectangular, the transmission rod drives the rotating rod to rotate. Since the rotating rod is threadedly connected to the moving block, the rotating rod rotates to realize the moving block and the connecting block to move together. Since the connecting block is fixedly connected to the support plate, the connecting block drives the support plate to move together and move to the position where cutting is required;

[0022] S4: Start different laser emitters on the side of the support plate to cut the plastic film through the laser emitters.

[0023] Technical effects and advantages of the present invention:

[0024] 1. The present invention is provided with a positioning mechanism, which is beneficial for placing the plastic film to be cut inside the processing groove when it is needed to fix the plastic film, starting the motor, and the motor drives the power rod to rotate. Since the sliding rod is located inside the sliding groove and the longitudinal sections of the two are both arranged in a rectangular structure, the power rod drives the transmission rod to rotate, the electric telescopic rod is started, and the electric telescopic rod drives the sliding plate to approach the motor, and the sliding plate drives the transmission rod to move together, so that the bevel gear sets are meshed with each other, and one end of the limiting rod moves out of the limiting groove, and the transmission rod drives a support rod to rotate. Since a reciprocating thread is provided on the outer wall of one of the support rods and is threadedly connected with one of the lifting plates, the rotation of the support rod drives one lifting plate to move downward, and a connecting plate is fixedly connected between the two lifting plates, so that the two lifting plates drive the positioning plate to move downward and clamp the plastic film, so that the position of the plastic film will not be offset during the cutting process, which is convenient for cutting the plastic film.

[0025] 2. The present invention is provided with a moving mechanism, which is advantageous in that when it is necessary to move to the position where cutting is required, the electric telescopic rod is started, the electric telescopic rod drives the sliding plate to move away from the motor, and the sliding plate drives the transmission rod to move together, so that the bevel gear sets are separated from each other, and one end of the limiting rod enters the limiting groove. Since the longitudinal sections of the limiting rod and the limiting groove are both rectangular, the transmission rod drives the rotating rod to rotate, and since the rotating rod is threadedly connected to the moving block, the rotating rod rotates to realize the movement of the moving block and the connecting block together, and since the connecting block is fixedly connected to the supporting plate, the connecting block drives the supporting plate to move together and move to the position where cutting is required. No manual movement is required, and the movement is fully automatic, saving manpower.

[0026] 3. The present invention is provided with a cutting mechanism, which is beneficial for starting different laser emitters on the side of the support plate when cutting is required, and cutting of the plastic film is achieved through the laser emitters. There is no need to use blades for cutting, and there is no need to replace blades, which is simpler and more convenient.

[0027] 4. The present invention is provided with a control mechanism, which is advantageous in that only one motor is needed to control the operation of the positioning mechanism and the moving mechanism, thereby improving the utilization rate of resources and saving the use of power sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0030] Figure 3 It is a schematic diagram of the structure of the mobile mechanism of the present invention.

[0031] Figure 4 for Figure 3 Schematic diagram of the limiting slot structure.

[0032] Figure 5 It is a schematic diagram of the cutting mechanism structure of the present invention.

[0033] Figure 6 It is a schematic diagram of the positioning mechanism structure of the present invention.

[0034] Figure 7 It is a schematic diagram of the structure of the transmission control mechanism of the present invention.

[0035] Figure 8 for Figure 7 Explosion diagram of the middle sliding slot structure.

[0036] The accompanying drawings are marked as follows: 1. shell; 2. processing groove; 3. support rod; 4. top plate; 5. moving mechanism; 501. moving groove; 502. groove; 503. rotating rod; 504. moving block; 505. connecting block; 506. limiting groove; 6. cutting mechanism; 601. support plate; 602. laser transmitter; 7. positioning mechanism; 701. lifting plate; 702. positioning plate; 8. control mechanism; 801. fixed plate; 802. support table; 803. motor; 804. support block; 805. power rod; 806. sliding plate; 807. electric telescopic rod; 808. transmission rod; 809. limiting rod; 810. sliding rod; 811. sliding groove. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative. The plastic film cutting device and cutting method involved in the present invention are not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0038] Reference Figure 1-8The present invention provides a plastic film cutting device and a cutting method thereof, comprising a shell 1, a processing groove 2 is provided on the upper surface of the shell 1, four support rods 3 are rotatably connected to the upper surface of the shell 1, and a top plate 4 is rotatably connected to the upper end of the support rod 3, a moving mechanism 5 for moving the position is provided on the side of the shell 1, a cutting mechanism 6 for cutting the plastic film is provided inside the processing groove 2, a positioning mechanism 7 for fixing the plastic film is provided on the upper surface of the shell 1, and a control mechanism 8 for providing power is provided on the side of the shell 1. By providing the moving mechanism 5, the cutting mechanism 6, the positioning mechanism 7 and the control mechanism 8, the plastic film can be fixed and automatically moved to the position where it needs to be cut, and cutting does not need to be performed using a tool, and the cutting is performed fully automatically;

[0039] The moving mechanism 5 includes a moving groove 501 provided on the side of the housing 1, a groove 502 provided on the side wall of the moving groove 501, a rotating rod 503 rotatably connected to the side wall of the moving groove 501, a moving block 504 slidably connected to the side wall of the moving groove 501, the rotating rod 503 is threadedly connected to the moving block 504, a connecting block 505 is slidably connected inside the groove 502, the connecting block 505 is fixedly connected to the moving block 504, and a limiting groove 506 is provided at the other end of the rotating rod 503. By providing the moving mechanism 5, it is beneficial to start the electric telescopic rod 807 when it is necessary to move to the position where cutting is required, and the electric telescopic rod 807 drives the sliding plate 806 to Away from the motor 803, the sliding plate 806 drives the transmission rod 808 to move together, so that the bevel gear sets are separated from each other, and one end of the limiting rod 809 enters the limiting groove 506. Since the longitudinal sections of the limiting rod 809 and the limiting groove 506 are both rectangular, the transmission rod 808 drives the rotating rod 503 to rotate. Since the rotating rod 503 is threadedly connected to the moving block 504, the rotating rod 503 rotates to realize the moving block 504 and the connecting block 505 to move together. Since the connecting block 505 is fixedly connected to the support plate 601, the connecting block 505 drives the support plate 601 to move together and move to the position where cutting is required. There is no need for manual movement, and it is fully automatic, saving manpower.

[0040] In a preferred embodiment, the groove 502 is connected to the processing groove 2, the longitudinal section of the limiting groove 506 is rectangular, and the transmission rod 808 drives the rotating rod 503 to rotate through the limiting groove 506 and the limiting rod 809.

[0041] In a preferred embodiment, the cutting mechanism 6 includes a support plate 601 slidably connected to the side wall of the processing groove 2, and multiple laser emitters 602 are installed on the left and right side walls of the support plate 601. By providing the cutting mechanism 6, it is beneficial to start the different laser emitters 602 on the side of the support plate 601 when cutting is required, and the cutting of the plastic film is achieved through the laser emitter 602. There is no need to use a blade for cutting, and there is no need to replace the blade, which is simpler and more convenient.

[0042] In a preferred embodiment, the model of the laser emitter 602 is YLP-1-100-20-20HC, the length of the support plate 601 is equal to the width of the processing groove 2, one end of the connecting block 505 extends to the outside of the groove 502 and is fixedly connected to the support plate 601, and the cutting of the plastic film is achieved by the laser emitter 602.

[0043] In a preferred embodiment, the positioning mechanism 7 includes a lifting plate 701 slidably connected to the outer wall of the support rod 3, and a positioning plate 702 is fixedly connected to the lower surface of the lifting plate 701. The positioning mechanism 7 is provided, which is conducive to placing the plastic film to be cut inside the processing groove 2 when the plastic film needs to be fixed, and starting the motor 803, the motor 803 drives the power rod 805 to rotate. Since the sliding rod 810 is located inside the sliding groove 811 and the longitudinal sections of both are rectangular structures, the power rod 805 drives the transmission rod 808 to rotate, and the electric telescopic rod 807 is started, and the electric telescopic rod 807 drives the sliding plate 806 to the motor 803. When the two lifting plates 701 are moved closer, the sliding plate 806 drives the transmission rod 808 to move together, so that the bevel gear sets are meshed with each other, and one end of the limiting rod 809 moves out of the limiting groove 506. The transmission rod 808 drives a support rod 3 to rotate. Since a reciprocating thread is provided on the outer wall of one of the support rods 3 and is threadedly connected to one of the lifting plates 701, the rotation of the support rod 3 drives a lifting plate 701 to move downward, and a connecting plate is fixedly connected between the two lifting plates 701, so that the two lifting plates 701 drive the positioning plate 702 to move downward and clamp the plastic film, so that the position of the plastic film will not be offset during the cutting process, which is convenient for cutting the plastic film.

[0044] In a preferred embodiment, a reciprocating thread is provided on the outer wall of one of the support rods 3 and is threadedly connected to one of the lifting plates 701, a connecting plate is fixedly connected between the two lifting plates 701, and the rotation of the support rod 3 will drive one of the lifting plates 701 to move downward, and a connecting plate is fixedly connected between the two lifting plates 701, so that the two lifting plates 701 will drive the positioning plate 702 to move downward and clamp the plastic film.

[0045] In a preferred embodiment, the control mechanism 8 includes a fixed plate 801 fixedly connected to the side of the housing 1, a support platform 802 is fixedly connected to the upper surface of the fixed plate 801, a motor 803 is installed on the upper surface of the support platform 802, a support block 804 is fixedly connected to the upper surface of the fixed plate 801, a power rod 805 is rotatably connected to the side of the support block 804, one end of the power rod 805 is fixedly connected to the end of the output shaft of the motor 803, the other end of the power rod 805 passes through the support block 804 and is provided with a sliding groove 811, and a sliding rod 805 is slidably connected to the upper surface of the fixed plate 801. An electric telescopic rod 807 is installed on the upper surface of the movable plate 806 and the fixed plate 801, the telescopic end of the electric telescopic rod 807 is fixedly connected to the sliding plate 806, and a transmission rod 808 is rotatably connected to the side of the sliding plate 806. One end of the transmission rod 808 is fixedly connected to the sliding rod 810, and the other end of the transmission rod 808 extends to the inside of the moving groove 501 and is fixedly connected to the limiting rod 809. By providing a control mechanism 8, it is beneficial to use only one motor 803 to realize the control of the operation of the positioning mechanism 7 and the moving mechanism 5, thereby improving the utilization rate of resources and saving the use of power sources.

[0046] In a preferred embodiment, the sliding rod 810 is located inside the sliding groove 811, and the longitudinal sections of the sliding rod 810, the sliding groove 811 and the limiting rod 809 are all rectangular. The lower end of the support rod 3 with a reciprocating thread on the outer wall extends into the movable groove 501 and is meshed with the transmission rod 808 through a bevel gear set. When the bevel gear sets are meshed with each other, one end of the limiting rod 809 will move out of the limiting groove 506, and the transmission rod 808 will drive a support rod 3 to rotate.

[0047] In a preferred embodiment, the specific steps are as follows:

[0048] S1: placing the plastic film to be cut inside the processing tank 2;

[0049] S2: Start the motor 803, the motor 803 drives the power rod 805 to rotate, because the sliding rod 810 is located inside the sliding groove 811 and the longitudinal sections of the two are both rectangular structures, the power rod 805 drives the transmission rod 808 to rotate, start the electric telescopic rod 807, the electric telescopic rod 807 drives the sliding plate 806 to approach the motor 803, the sliding plate 806 drives the transmission rod 808 to move together, so that the bevel gear sets are meshed with each other, and one end of the limiting rod 809 moves out of the limiting groove 506, and the transmission rod 808 drives a support rod 3 to rotate. Because a reciprocating thread is provided on the outer wall of one of the support rods 3 and is threadedly connected to one of the lifting plates 701, the rotation of the support rod 3 drives one lifting plate 701 to move downward, and a connecting plate is fixedly connected between the two lifting plates 701, so that the two lifting plates 701 drive the positioning plate 702 to move downward and clamp the plastic film;

[0050] S3: Start the electric telescopic rod 807, which drives the sliding plate 806 away from the motor 803. The sliding plate 806 drives the transmission rod 808 to move together, so that the bevel gear sets are separated from each other. One end of the limiting rod 809 enters the limiting groove 506. Since the longitudinal sections of the limiting rod 809 and the limiting groove 506 are both rectangular, the transmission rod 808 drives the rotating rod 503 to rotate. Since the rotating rod 503 is threadedly connected to the moving block 504, the rotating rod 503 rotates to realize the moving block 504 and the connecting block 505 to move together. Since the connecting block 505 is fixedly connected to the support plate 601, the connecting block 505 drives the support plate 601 to move together and move to the position where cutting is required.

[0051] S4: Start different laser emitters 602 on the side of the support plate 601 to cut the plastic film through the laser emitters 602.

[0052] The working principle of the present invention is as follows: when the plastic film needs to be fixed, the plastic film to be cut is placed inside the processing groove 2, the motor 803 is started, and the motor 803 drives the power rod 805 to rotate. Since the sliding rod 810 is located inside the sliding groove 811 and the longitudinal sections of both are arranged in a rectangular structure, the power rod 805 drives the transmission rod 808 to rotate, and the electric telescopic rod 807 is started. The electric telescopic rod 807 drives the sliding plate 806 to approach the motor 803, and the sliding plate 806 drives the transmission rod 808 to move together, so that the bevel gear sets are meshed with each other. One end of the limiting rod 809 moves out of the limiting groove 506, and the transmission rod 808 drives one of the support rods 3 to rotate. Since a reciprocating thread is provided on the outer wall of one of the support rods 3 and is threadedly connected to one of the lifting plates 701, the rotation of the support rod 3 drives one of the lifting plates 701 to move downward, and a connecting plate is fixedly connected between the two lifting plates 701, so that the two lifting plates 701 drive the positioning plate 702 to move downward and clamp the plastic film, so that the position of the plastic film will not be offset during the cutting process, which is convenient for cutting the plastic film.

[0053] When it is necessary to move to the position where cutting is required, the electric telescopic rod 807 is started, and the electric telescopic rod 807 drives the sliding plate 806 to move away from the motor 803, and the sliding plate 806 drives the transmission rod 808 to move together, so that the bevel gear sets are separated from each other, and one end of the limiting rod 809 enters the limiting groove 506. Since the longitudinal sections of the limiting rod 809 and the limiting groove 506 are both rectangular, the transmission rod 808 will drive the rotating rod 503 to rotate. Since the rotating rod 503 is threadedly connected to the moving block 504, the rotating rod 503 rotates to realize the moving block 504 and the connecting block 505 to move together. Since the connecting block 505 is fixedly connected to the support plate 601, the connecting block 505 will drive the support plate 601 to move together and move to the position where cutting is required. There is no need for manual movement, and it is fully automatic, saving manpower.

[0054] When cutting is required, different laser emitters 602 on the side of the support plate 601 are activated to cut the plastic film through the laser emitters 602. There is no need to use blades for cutting and there is no need to replace blades, which is simpler and more convenient.

Claims

1. A plastic film cutting device, comprising a housing (1), characterized in that: A processing groove (2) is provided on the upper surface of the shell (1); four support rods (3) are rotatably connected to the upper surface of the shell (1); the upper ends of the support rods (3) are rotatably connected to a top plate (4); a moving mechanism (5) for moving a position is provided on the side of the shell (1); a cutting mechanism (6) for cutting a plastic film is provided inside the processing groove (2); a positioning mechanism (7) for fixing the plastic film is provided on the upper surface of the shell (1); and a control mechanism (8) for providing power is provided on the side of the shell (1); The moving mechanism (5) comprises a moving groove (501) formed on a side surface of the housing (1); a groove (502) is formed on a side wall of the moving groove (501); a rotating rod (503) is rotatably connected to the side wall of the moving groove (501); a moving block (504) is slidably connected to the side wall of the moving groove (501); the rotating rod (503) is threadedly connected to the moving block (504); a connecting block (505) is slidably connected inside the groove (502); the connecting block (505) is fixedly connected to the moving block (504); and a limiting groove (506) is formed on the other end of the rotating rod (503); The control mechanism (8) comprises a fixing plate (801) fixedly connected to the side of the housing (1); a support platform (802) is fixedly connected to the upper surface of the fixing plate (801); a motor (803) is mounted on the upper surface of the support platform (802); a support block (804) is fixedly connected to the upper surface of the fixing plate (801); a power rod (805) is rotatably connected to the side of the support block (804); one end of the power rod (805) is fixedly connected to the end of the output shaft of the motor (803); and the other end of the power rod (805) penetrates the support block (804). 4) and is provided with a sliding groove (811), a sliding plate (806) is slidably connected to the upper surface of the fixed plate (801), an electric telescopic rod (807) is installed on the upper surface of the fixed plate (801), the telescopic end of the electric telescopic rod (807) is fixedly connected to the sliding plate (806), a transmission rod (808) is rotatably connected to the side of the sliding plate (806), one end of the transmission rod (808) is fixedly connected to the sliding rod (810), and the other end of the transmission rod (808) extends into the interior of the movable groove (501) and is fixedly connected to a limiting rod (809).

2. A plastic film cutting device according to claim 1, characterized in that: The groove (502) is in communication with the processing groove (2), and the longitudinal section of the limiting groove (506) is rectangular.

3. A plastic film cutting device according to claim 1, characterized in that: The cutting mechanism (6) comprises a support plate (601) slidably connected to the side wall of the processing groove (2), and a plurality of laser emitters (602) are installed on both the left and right side walls of the support plate (601).

4. A plastic film cutting device according to claim 3, characterized in that: The model of the laser emitter (602) is YLP-1-100-20-20HC, the length of the support plate (601) is equal to the width of the processing groove (2), and one end of the connecting block (505) extends to the outside of the groove (502) and is fixedly connected to the support plate (601).

5. A plastic film cutting device according to claim 1, characterized in that: The positioning mechanism (7) comprises a lifting plate (701) slidably connected to the outer wall of the support rod (3), and a positioning plate (702) is fixedly connected to the lower surface of the lifting plate (701).

6. A plastic film cutting device according to claim 5, characterized in that: A reciprocating thread is provided on the outer wall of one of the support rods (3) and is threadedly connected to one of the lifting plates (701); a connecting plate is fixedly connected between the two lifting plates (701).

7. A plastic film cutting device according to claim 1, characterized in that: The sliding rod (810) is located inside the sliding groove (811); the longitudinal sections of the sliding rod (810), the sliding groove (811) and the limiting rod (809) are all rectangular; the lower end of the support rod (3) having a reciprocating thread on its outer wall extends into the inside of the moving groove (501) and meshes with the transmission rod (808) via a bevel gear set.

8. The cutting method of the plastic film cutting device according to claim 1, characterized in that: The specific steps are as follows: S1: placing the plastic film to be cut into the processing tank (2); S2: The motor (803) is started, and the motor (803) drives the power rod (805) to rotate. Since the sliding rod (810) is located inside the sliding groove (811) and the longitudinal sections of the two are both arranged in a rectangular structure, the power rod (805) drives the transmission rod (808) to rotate, and the electric telescopic rod (807) is started. The electric telescopic rod (807) drives the sliding plate (806) to move closer to the motor (803), and the sliding plate (806) drives the transmission rod (808) to move together, so that the bevel gear sets are meshed with each other, and the limit One end of the rod (809) moves out of the limiting groove (506), and the transmission rod (808) drives one of the support rods (3) to rotate. Since a reciprocating thread is provided on the outer wall of one of the support rods (3) and is threadedly connected to one of the lifting plates (701), the rotation of the support rod (3) drives one of the lifting plates (701) to move downward, and a connecting plate is fixedly connected between the two lifting plates (701), so that the two lifting plates (701) drive the positioning plate (702) to move downward and clamp the plastic film; S3: Start the electric telescopic rod (807), the electric telescopic rod (807) drives the sliding plate (806) away from the motor (803), the sliding plate (806) drives the transmission rod (808) to move together, so that the bevel gear sets are separated from each other, and one end of the limiting rod (809) enters the limiting groove (506). Since the longitudinal sections of the limiting rod (809) and the limiting groove (506) are both rectangular, the transmission rod (808) drives the rotating rod (503) to rotate. Since the rotating rod (503) is threadedly connected to the moving block (504), the rotating rod (503) rotates to realize the moving block (504) and the connecting block (505) to move together. Since the connecting block (505) is fixedly connected to the support plate (601), the connecting block (505) drives the support plate (601) to move together and move to the position where cutting is required; S4: activating different laser emitters (602) on the side of the support plate (601), and cutting the plastic film through the laser emitters (602).

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