Plastic bag cutting device

Abstract

The utility model discloses a plastic bag cutting device, which relates to the field of plastic bag processing, and comprises a rack and a collecting device, and a platform is arranged on the rack; a platform is arranged on the rack, a cutting assembly is arranged on the rack above the platform, the cutting assembly comprises a lifting plate, an upper cutter is fixedly connected to the bottom of the lifting plate, a notch for the upper cutter to penetrate through is formed in the platform, a lower cutter corresponding to the upper cutter is arranged below the notch, and the two sides of the upper cutter are each provided with a pressing device. The collecting device comprises a rotating shaft, a winding wheel is fixedly connected to the rotating shaft, and a stroke limiting switch is arranged below the winding wheel; by means of the pressing device, the plastic bags are prevented from deviating during cutting; the collecting device synchronously rolls the cut offcut, the offcut is prevented from being stacked and wound on other parts on a production line, the offcut is recycled and arranged in the later period, and when the offcut is rolled to the preset thickness, the stroke limiting switch is triggered, and conveying and cutting of the plastic bag are automatically stopped.

Description

Technical Field

[0001] The utility model relates to the field of plastic bag processing, in particular to a plastic bag cutting device. Background Art

[0002] In order to avoid edge damage during the production process of existing plastic bags, a certain amount of edge material is reserved at the edge of the plastic bag, and the edge material of the plastic bag is not cut until the connected plastic bags are finally separated.

[0003] Our company's previous cutting device did not process the leftover materials after cutting them, resulting in more and more leftover materials piling up beside the production line during the plastic bag cutting process. The leftover materials were prone to floating and entangled with other parts on the production line, causing inconvenience to production. At the same time, the recycling and sorting of the leftover materials in the later stage was also more troublesome. Utility Model Content

[0004] The purpose of the utility model is to provide a plastic bag cutting device to solve the problems mentioned in the above background technology.

[0005] A plastic bag cutting device comprises a conveying device, a frame and a collecting device, wherein a platform is arranged on the frame, and the conveying device is used to convey the plastic bag on the platform; a cutting assembly is arranged on the frame above the platform, and the cutting assembly comprises a lifting plate, an upper cutter is fixedly connected to the bottom of the lifting plate, a notch is arranged on the platform for the upper cutter to pass through, a lower cutter corresponding to the upper cutter is arranged below the notch, and a pressing device is arranged on both sides of the upper cutter, and when the lifting plate descends, the pressing device can be driven to press the plastic bag on the platform, and the upper cutter and the lower cutter are used to cut the edges and corners of the plastic bag;

[0006] The collecting device includes a rotating shaft, to which a winding wheel is fixedly connected. The winding wheel is used to wind the scraps into a roll. A travel limit switch is provided under the winding wheel. When the scraps on the winding wheel are continuously wound to a preset thickness, the travel limit switch is triggered to pause the conveying equipment and cutting components of the plastic bag.

[0007] Preferably, the cutting assembly further comprises a cylinder, the lifting plate is fixedly connected to the output shaft of the cylinder, and a guide rod is fixedly connected to the top of the lifting plate, the guide rod is slidably connected to the frame, and the cylinder is fixedly connected to the frame.

[0008] Preferably, the clamping device includes a pressing block, a sliding rod is fixedly connected to the pressing block, the sliding rod is slidably connected to the lifting plate, and an anti-slip block is fixedly connected to the top of the sliding rod, and a spring is also sleeved on the sliding rod between the lifting plate and the pressing block.

[0009] Preferably, the collecting device also includes a motor, the output shaft of the motor is fixedly connected to the rotating shaft, a limit plate is provided on the rotating shaft, a positioning column is provided on the limit plate, a positioning hole corresponding to the positioning column is provided at the inner end of the winding wheel, and a baffle plate is also provided at the outer end of the winding wheel which is fixedly connected to the winding wheel and the rotating shaft by screws.

[0010] Preferably, a sliding roller rotatably connected to the frame is further provided above the winding wheel, and the edge material of the plastic bag passes around the sliding roller and is fixedly connected to the winding wheel.

[0011] The advantages of the utility model are:

[0012] In the utility model, when cutting the edge material, a pressing device that can move with the movement is added to prevent the plastic bag from deflecting during cutting;

[0013] The collection device uses a winding wheel to synchronously rewind the cut edge materials to prevent the edge materials from accumulating and winding around other parts on the production line. It also facilitates the subsequent recovery and sorting of the edge materials. Taking advantage of the characteristic that the edge materials become thicker as they are rolled, a travel limit switch is added. When the edge materials are rolled to a preset thickness, the travel limit switch can be triggered, thereby automatically pausing the plastic bag conveying equipment and cutting components to facilitate unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model when cutting;

[0015] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the cutting components and the pressing device after the frame is cut open;

[0017] Figure 4 Schematic diagram of the structure of the collection device.

[0018] In the figure: 1, frame; 2, collecting device; 21, rotating shaft; 22, winding wheel; 23, travel limit switch; 24, motor; 25, limit plate; 26, positioning column; 27, baffle plate; 28, sliding roller;

[0019] 3. Platform; 31. Gap;

[0020] 4. Cutting assembly; 41. Lifting plate; 42. Upper cutter; 43. Lower cutter; 44. Cylinder; 45. Guide rod;

[0021] 5. Clamping device; 51. Pressing block; 52. Sliding rod; 53. Anti-slip block; 54. Spring; 6. Plastic bag; 61. Edge material. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 4 As shown, a plastic bag cutting device includes a conveying device, a frame 1, and a collecting device 2. The frame 1 is provided with a platform 3, and the conveying device is used to convey the plastic bag 6 on the platform 3; the frame 1 above the platform 3 is provided with a cutting assembly 4, and the cutting assembly 4 includes a lifting plate 41, and the bottom of the lifting plate 41 is fixedly connected to an upper cutter 42, and the platform 3 is provided with a notch 31 for the upper cutter 42 to pass through, and a lower cutter 43 corresponding to the upper cutter 42 is provided below the notch 31, and a pressing device 5 is provided on both sides of the upper cutter 42. When the lifting plate 41 descends, the pressing device 5 can be driven to press the plastic bag 6 on the platform 3, and the upper cutter 42 and the lower cutter 43 are used to cut the corners of the plastic bag 6;

[0024] The collecting device 2 includes a rotating shaft 21, to which a winding wheel 22 is fixedly connected. The winding wheel 22 is used to wind the scraps into a roll. A travel limit switch 23 is provided below the winding wheel 22. When the scraps on the winding wheel 22 are continuously wound to a preset thickness, the travel limit switch 23 is triggered to pause the conveying equipment of the plastic bag 6 and the cutting component 4.

[0025] In this embodiment, the cutting assembly 4 also includes a cylinder 44, the lifting plate 41 is fixedly connected to the output shaft of the cylinder 44, and a guide rod 45 is fixedly connected to the top thereof, the guide rod 45 is slidably connected to the frame 1, and the cylinder 44 is fixedly connected to the frame 1.

[0026] In this embodiment, the pressing device 5 includes a pressing block 51, a sliding rod 52 is fixedly connected to the pressing block 51, the sliding rod 52 is slidably connected to the lifting plate 41, and an anti-slip block 53 is fixedly connected to the top thereof, and a spring 54 is also sleeved on the sliding rod 52 between the lifting plate 41 and the pressing block 51. The spring 54 is used to enable the pressing block 51 to act on the platform 3 to press the plastic bag 6.

[0027] In this embodiment, the collecting device 2 further includes a motor 24, the output shaft of the motor 24 is fixedly connected to the rotating shaft 21, a limit plate 25 is provided on the rotating shaft 21, a positioning column 26 is provided on the limit plate 25, a positioning hole corresponding to the positioning column 26 is provided at the inner end of the winding wheel 22, the positioning column 26 and the positioning hole can make the winding wheel 22 rotate with the rotating shaft 21, and a baffle 27 is also provided at the outer end of the winding wheel 22, which is fixedly connected to the winding wheel 22 and the rotating shaft 21 by screws. The baffle 27 is used to limit the edge material 61 on the one hand, and to fix the winding wheel 22 on the rotating shaft 21 on the other hand.

[0028] In this embodiment, a sliding roller 28 rotatably connected to the frame 1 is further provided above the winding wheel 22, and the edge material 61 of the plastic bag 6 passes around the sliding roller 28 and is fixedly connected to the winding wheel 22. The sliding roller 28 is used to constrain and support the edge material 61.

[0029] Working process and principle:

[0030] The plastic bags 6 are intermittently transported on the platform 3 by conveying equipment such as conveying rollers.

[0031] When the plastic bag 6 is transported to the preset position, the conveying equipment suspends the conveying function of the plastic bag 6, and then the cylinder 44 drives the lifting plate 41 to move downward, and the lower cutter 43 and the pressing block 51 move downward together, and the pressing block 51 first presses the plastic bag 6 on the platform 3, and then the lower cutter 43 continues to move downward, the spring 54 is compressed, and the pressing block 51 remains in a pressed state, and the lower cutter 43 interacts with the upper cutter 42 to cut the edge material 61 of the plastic bag 6.

[0032] One end of the edge material 61 of the plastic bag 6 can be fixed on the winding wheel 22 by bonding. As the edge material 61 is cut off, the plastic bag 6 resumes its conveying function, and the edge material 61 is wound onto the winding wheel 22 under the action of the motor 24 driving the rotating shaft 21 to drive the winding wheel 22. The baffle 27 is used to limit the edge material 61 on the one hand, and to fix the winding wheel 22 on the rotating shaft 21 on the other hand.

[0033] When the edge material 61 on the winding wheel 22 is wound to a preset thickness, the travel limit switch 23 will be triggered, and the system will automatically pause the conveying equipment and cutting component 4 of the plastic bag 6. The edge material 61 can then be manually cut off, the baffle 27 can be loosened, the winding wheel 22 can be removed, and a new winding wheel 22 can be placed. The edge material 61 can be glued to the new winding wheel 22 again to continue collecting the edge material 61.

[0034] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the utility model or within the scope equivalent to the utility model are included in the utility model.

Claims

1. A plastic bag cutting device, comprising a conveying device, characterized in that: It also comprises a frame (1) and a collecting device (2), wherein a platform (3) is provided on the frame (1), and the conveying device is used to convey the plastic bag (6) on the platform (3); a cutting assembly (4) is provided on the frame (1) above the platform (3), and the cutting assembly (4) comprises a lifting plate (41), and an upper cutter (42) is fixedly connected to the bottom of the lifting plate (41); a notch (31) for the upper cutter (42) to pass through is provided on the platform (3), and a lower cutter (43) corresponding to the upper cutter (42) is provided below the notch (31); a pressing device (5) is provided on both sides of the upper cutter (42); when the lifting plate (41) descends, the pressing device (5) can be driven to press the plastic bag (6) on the platform (3), and the upper cutter (42) and the lower cutter (43) are used to cut the edges and corners of the plastic bag (6); The collecting device (2) comprises a rotating shaft (21), a winding wheel (22) is fixedly connected to the rotating shaft (21), the winding wheel (22) is used to wind the scraps into a roll, and a travel limit switch (23) is provided below the winding wheel (22). When the scraps on the winding wheel (22) are continuously wound to a preset thickness, the travel limit switch (23) is triggered, thereby pausing the conveying device of the plastic bag (6) and the cutting component (4).

2. A plastic bag cutting device according to claim 1, characterized in that: The cutting assembly (4) further comprises a cylinder (44), the lifting plate (41) is fixedly connected to the output shaft of the cylinder (44), and a guide rod (45) is fixedly connected to the top of the lifting plate, the guide rod (45) is slidably connected to the frame (1), and the cylinder (44) is fixedly connected to the frame (1).

3. A plastic bag cutting device according to claim 1, characterized in that: The clamping device (5) comprises a pressing block (51), a sliding rod (52) is fixedly connected to the pressing block (51), the sliding rod (52) is slidably connected to the lifting plate (41), and an anti-slip block (53) is fixedly connected to the top of the sliding rod (52), and a spring (54) is also sleeved on the sliding rod (52) between the lifting plate (41) and the pressing block (51).

4. A plastic bag cutting device according to claim 1, characterized in that: The collecting device (2) further comprises a motor (24), the output shaft of the motor (24) being fixedly connected to the rotating shaft (21), a limiting plate (25) being provided on the rotating shaft (21), a positioning column (26) being provided on the limiting plate (25), a positioning hole corresponding to the positioning column (26) being provided at the inner end of the winding wheel (22), and a baffle (27) being fixedly connected to the winding wheel (22) and the rotating shaft (21) by screws being provided at the outer end of the winding wheel (22).

5. A plastic bag cutting device according to claim 1, characterized in that: A sliding roller (28) rotatably connected to the frame (1) is also provided above the winding wheel (22); the edge material (61) of the plastic bag (6) passes over the sliding roller (28) and is fixedly connected to the winding wheel (22).

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