Multi-size dividing and cutting machine for plastic bags

Abstract

The utility model relates to the field of plastic bag processing, and discloses a plastic bag multi-size dividing and cutting machine which comprises a supporting plate, a sliding strip, a rotating shaft, a first motor, a threaded rod, dividing and cutting knives, a limiting plate, moving bolts and a graduated scale. During use, when the size of the dividing and cutting knives needs to be adjusted to achieve multi-size plastic bag dividing and cutting, the moving bolts on the two sides of the same dividing and cutting knife are rotated firstly, and then the dividing and cutting knives are rotated; the movable bolts move left and right, the two limiting plates are driven to move left and right together, the movable slitting knives rotationally connected in the limiting plates are driven to move left and right along the sliding strips till the slitting knives are moved to specific positions on the dividing ruler, and therefore the distance between the slitting knives is adjusted; and then the first motor is started to drive the rotating shaft and the slitting knife to rotate together so that the slitting knife can slit the plastic bag. The plastic bag slitting device has the advantages and effects that the distance between the slitting knives is easy to adjust, plastic bags of various sizes can be slit, the slitting edges are smooth, and the slitting quality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic bag processing, in particular to a multi-size slitting machine for plastic bags. Background Art

[0002] Plastic bags, made primarily from materials such as polypropylene, polyester, and nylon, are essential for daily life and are often used to store other items. Widely used due to their low cost, extremely light weight, large capacity, and ease of storage, they require large-scale production, necessitating the use of plastic bag production and slitting equipment. A utility model patent with authorization publication number CN 212684871U discloses a slitting machine for producing plastic packaging bags, comprising a housing, the inner bottom wall of which is fixedly connected to a support base, the upper surface of which is provided with a first chute, the interior of which is slidably connected to a slider, and the upper surface of which is fixedly connected to a rack. The utility model has a reasonable design structure. It can achieve this through the coordinated design of the motor, threaded rod, slider, rack and cylinder. The motor drives the threaded rod to rotate, thereby pushing the slider to move in the slide groove. The coordinated design of the rack and the teeth makes the deflection angle of the support plate parallel to the cutting surface of the cutter, so that the width of the gap between the cutter and the support plate can be adjusted, and the upper surface of the support plate is parallel to the cutter, so as to avoid the occurrence of gaps when the cutter contacts the upper surface of the support plate and the inability to complete cutting, thereby ensuring the cutting effect.

[0003] However, the existing technology still has the following defects: when cutting plastic bags, the spacing of the cutting knives is fixed, and the cutting width cannot be adjusted according to the specifications of the plastic bags, and cannot meet the cutting needs of plastic bags of various specifications; and because plastic bags are relatively thin, they are very easy to wrinkle, resulting in inaccurate size during cutting, thereby affecting the cutting quality of the plastic bags. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-size plastic bag slitting machine, which solves the above technical problems, has the advantages of easy adjustment of the spacing between slitting blades, can slit plastic bags of multiple sizes with smooth slitting edges and high slitting quality.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: a plastic bag multi-size slitting machine, including a frame, support plates are provided on both sides of the frame, two threaded rods are fixed between the support plates, and a rotating shaft is provided for rotation. The rotating shaft is located between the two threaded rods, and a sliding sleeve on the outer side of the rotating shaft is provided with multiple annular slitting knives and a slide bar is provided on the top. A slide groove is provided on the inner wall of the slitting knife, and the slide bar is slidably connected in the slide groove. Limit plates are rotatably provided on both sides of the slitting knife, and the two ends of the limit plate are slidably connected to the threaded rod. The limit plates located on both sides of the same slitting knife are fixedly connected and a movable bolt is provided for rotation between them. The movable bolt is threadably connected to the screw rod, and also includes a driving component that drives the rotating shaft to rotate.

[0006] By adopting the above technical solution, fixed limit plates are provided on both sides of the slitting knife to limit the slitting knife and ensure the slitting stability; since the two sides of the movable bolt are rotatably connected to the inner wall of the limit plate, and the movable bolt is threadedly connected to the threaded rod, the movable bolt is rotated to make the two symmetrical movable bolts move left and right. Since the limit plates on both sides of the same slitting knife are fixedly connected, the two limit plates are driven to move left and right together, and the slitting knife is driven to move left and right along the slide bar, thereby realizing the adjustment of the slitting knife spacing. It has the advantages of easy adjustment of the slitting knife spacing and the ability to slitting plastic bags of multiple sizes. The driving component drives the rotating shaft to rotate, and the rotating shaft drives the slitting knife to rotate to realize the segmentation of the plastic bags.

[0007] The utility model is further configured as follows: an L-shaped connecting rod is provided on the outer side of the limiting plate; a smoothing roller is rotatably provided on the lower end of the L-shaped connecting rod; the smoothing roller is used to flatten the edges on both sides of the plastic bag.

[0008] By adopting the above technical solution, a smoothing roller is set to flatten the dividing edges on both sides of the plastic bag to prevent curling, which has the advantages of smooth cutting edges and high cutting quality.

[0009] The utility model is further configured as follows: a smoothing pad is fixedly arranged on the outer surface of the smoothing roller.

[0010] The utility model is further configured such that when the slitting knife contacts the plastic bag, the bottom of the smooth pad presses the plastic bag tightly.

[0011] By adopting the above technical solution, a smooth pad is provided on the outer surface of the smoothing roller to be slidably connected to the plastic bag, thereby preventing the rough surface of the smoothing roller from lifting the plastic bag and reducing the slitting accuracy.

[0012] The present invention is further configured as follows: the driving component is a first motor, and the output end of the first motor is fixedly connected to the rotating shaft.

[0013] By adopting the above technical solution, the first motor is installed to drive the rotating shaft to rotate, and the slitting speed is fast and efficient.

[0014] The utility model is further configured as follows: it also includes a clamping assembly that drives the support plate to rise and fall, the clamping assembly includes a screw rod rotatably connected to the side end of the frame, a guide rod fixed to the other end of the frame, one end of the support plate is threadedly connected to the screw rod, and the other end is slidably connected to the guide rod.

[0015] By adopting the above technical solution, first rotate the screw to raise the support plate, then lay the plastic bag under the rotating shaft, and finally rotate the screw to lower the support plate until the slitting knife abuts against the plastic bag, making it convenient to pass the plastic bag through the bottom end of the rotating shaft.

[0016] The utility model is further configured as follows: a pressing motor is provided below the frame, and the pressing motor is used to drive the screw rod to rotate.

[0017] By adopting the above technical solution, a clamping motor is provided to drive the screw rod to rotate, thereby driving the support plate to rise and fall.

[0018] The utility model is further configured as follows: a scale is provided on one side of the threaded rod.

[0019] By adopting the above technical solution and setting a scale, it is convenient to accurately adjust the distance between the slitting knives, thereby further improving the cutting quality.

[0020] The present invention is further configured as follows: the support plate is L-shaped.

[0021] The present invention is further configured as follows: it also includes an unwinding assembly and a rewinding assembly, and the support plate is located between the unwinding assembly and the rewinding assembly.

[0022] By adopting the above technical solution, the unwinding assembly unwinds, and the plastic bag passes through the bottom end of the rotating shaft and is rolled on the rewinding assembly, thereby realizing the automatic feeding and discharging of the divided plastic bags.

[0023] The beneficial effects of the utility model are:

[0024] 1. The slitting knife is limited by providing fixed limit plates on both sides of the slitting knife to ensure slitting stability; since both sides of the movable bolt are rotatably connected to the inner wall of the limit plate, and the movable bolt is threadedly connected to the threaded rod, the movable bolt is rotated to make the two symmetrical movable bolts move left and right. Since the limit plates on both sides of the same slitting knife are fixedly connected, the two limit plates are driven to move left and right together, and the slitting knife is driven to move left and right along the slide bar, thereby realizing adjustment of the slitting knife spacing. It has the advantages of easy adjustment of the slitting knife spacing and ability to slit plastic bags of multiple sizes. The driving assembly drives the rotating shaft to rotate, and the rotating shaft drives the slitting knife to rotate to realize the segmentation of the plastic bags.

[0025] 2. A smoothing roller is set on the outer wall below the limiting plate. When the smoothing roller rotates, it flattens the dividing edges on both sides of the plastic bag to prevent the edges of the plastic bag from curling after cutting. It has the advantages of smooth cutting edges and high cutting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0028] Figure 2This utility model Figure 1 Enlarged view of the AA structure.

[0029] In the figure, 1. frame; 2. support plate; 3. threaded rod; 4. rotating shaft; 5. slitting knife; 6. slide bar; 7. limit plate; 8. moving bolt; 9. L-shaped connecting rod; 10. smoothing roller; 11. first motor; 12. clamping assembly; 121. screw rod; 122. guide rod; 123. clamping motor; 13. scale; 14. unwinding assembly; 15. rewinding assembly. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0031] Embodiment, a plastic bag multi-size slitting machine, such as Figure 1 、 Figure 2 As shown, it includes a frame 1 with an unwinding assembly 14 at the front and a winding assembly 15 at the rear, a screw rod 121 rotatably set on the frame 1, a guide rod 122 fixedly set on the frame 1, an L-shaped support plate 2 that is slidably connected to the guide rod 122 and another threaded connection to the screw rod 121, a pressing motor 123 that drives the screw rod 121 to rotate, a pressing assembly 12 including the screw rod 121, the guide rod 122, and the pressing motor 123, a rotating shaft 4 rotatably connected between the support plates 2 and provided with a slide bar 6, with The first motor 11 for rotating the rotating shaft 4 is respectively located on both sides of the rotating shaft 4 and is fixed to the threaded rod 3 on the support plate 2. A slide groove for slidingly connecting the slide bar 6 and an annular slitting knife 5 is provided on the rotating shaft 4. The limit plates 7 are located on both sides of the slitting knife 5 and are slidably connected to the threaded rod 3 at both ends. Among them, the two limit plates 7 located on both sides of the same slitting knife 5 are fixedly connected and a movable bolt 8 is rotatably provided between the two ends of the two limit plates 7. The movable bolt 8 is threadedly connected to the threaded rod 3, and a scale 13 is provided on one side of the threaded rod 3.

[0032] Its working principle is: first, start the pressing motor 123 to drive the screw rod 121 to rotate, so that the support plate 2 rises to facilitate the laying of the plastic bag under the rotating shaft 4, unwinding through the unwinding component 14, the plastic bag passes through the bottom of the rotating shaft 4 and is rolled on the rewinding component 15, realizing the automatic feeding and discharging of the plastic bag; when it is necessary to adjust the size of the slitting knife 5 to achieve multi-size plastic bag slitting, first rotate the moving bolts 8 on both sides of the same slitting knife 5 in the same direction at the same time to make the moving bolt 8 move left and right, driving the two limit plates 7 moves left and right together, driving the movable slitting knife 5 connected to the rotation inside the limit plate 7 to move left and right along the slide bar 6 until the slitting knife 5 is moved to a specific position on the scale 13, thereby realizing the adjustment of the spacing of the slitting knives 5, which has the advantages of easy adjustment of the spacing of the slitting knives 5 and the ability to slit plastic bags of multiple sizes; then rotate the screw rod 121 to lower the support plate 2 until the slitting knife 5 abuts against the plastic bag, at this time start the first motor 11 to drive the rotating shaft 4 and the slitting knife 5 to rotate together to realize the slitting knife 5 cutting the plastic bag.

[0033] Specifically, if Figure 1 As shown, an L-shaped connecting rod 9 is provided on the outer wall of the limiting plate 7, and a smoothing roller 10 is rotatably provided at the lower end of the L-shaped connecting rod 9. The smoothing roller 10 is used to flatten the edges of both sides of the plastic bag.

[0034] Specifically, a smooth pad is fixedly provided on the outer surface of the smoothing roller 10. When the slitting knife 5 contacts the plastic bag, the bottom of the smooth pad presses the bag tightly.

[0035] When the screw 121 is rotated to make the support plate 2 drop until the slitting knife 5 abuts the plastic bag, the smooth pad bottom of the outer surface of the smoothing roller 10 presses the plastic bag, pressing the dividing curl at the edge of the plastic bag, which can ensure smooth slitting edges and improve slitting quality.

Claims

1. A plastic bag multi-size slitting machine, comprising a frame (1), characterized in that: The frame (1) is provided with support plates (2) on both sides, two threaded rods (3) are fixedly provided between the support plates (2), and a rotating shaft (4) is provided for rotation. The rotating shaft (4) is located between the two threaded rods (3). A plurality of annular slitting knives (5) are slidably sleeved on the outer side of the rotating shaft (4), and a slide bar (6) is provided on the upper side. A slide groove is provided on the inner wall of the slitting knife (5), and the slide bar (6) is slidably connected in the slide groove. Limiting plates (7) are rotatably provided on both sides of the slitting knife (5). The two ends of the limiting plates (7) are slidably connected to the threaded rods (3). The limiting plates (7) located on both sides of the same slitting knife (5) are fixedly connected and a moving bolt (8) is provided for rotation therebetween. The moving bolt (8) is threadedly connected to the screw rod, and also includes a driving component for driving the rotating shaft (4) to rotate.

2. The multi-size plastic bag slitting machine according to claim 1, characterized in that: An L-shaped connecting rod (9) is provided on the outer side of the limiting plate (7), and a smoothing roller (10) is rotatably provided at the lower end of the L-shaped connecting rod (9). The smoothing roller (10) is used to flatten the edges on both sides of the plastic bag.

3. The multi-size plastic bag slitting machine according to claim 2, characterized in that: The outer surface of the smoothing roller (10) is fixedly provided with a smooth pad.

4. The multi-size plastic bag slitting machine according to claim 3, characterized in that: When the slitting knife (5) contacts the plastic bag, the bottom of the smooth pad presses the plastic bag tightly.

5. The multi-size plastic bag slitting machine according to claim 1, characterized in that: The driving component is a first motor (11), and the output end of the first motor (11) is fixedly connected to the rotating shaft (4).

6. The multi-size plastic bag slitting machine according to claim 1, characterized in that: The invention also includes a clamping assembly (12) for driving the support plate (2) to rise and fall, wherein the clamping assembly (12) includes a screw rod (121) rotatably connected to the side end of the frame (1) and a guide rod (122) fixed to the other end of the frame (1); one end of the support plate (2) is threadedly connected to the screw rod (121) and the other end is slidably connected to the guide rod (122).

7. The multi-size plastic bag slitting machine according to claim 6, characterized in that: A pressing motor (123) is provided below the frame (1), and the pressing motor (123) is used to drive the screw rod (121) to rotate.

8. The multi-size plastic bag slitting machine according to claim 1, characterized in that: A scale (13) is provided on one side of the threaded rod (3).

9. The multi-size plastic bag slitting machine according to claim 1, characterized in that: The support plate (2) is L-shaped.

10. The multi-size plastic bag slitting machine according to claim 1, characterized in that: It also includes an unwinding assembly (14) and a rewinding assembly (15), and the support plate (2) is located between the unwinding assembly (14) and the rewinding assembly (15).

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