Edge cutting device for plastic packaging bag processing

Abstract

The utility model provides a kind of edge cutting device for plastic packaging bag processing, it is related to packaging bag edge cutting technical field, the utility model includes two vertical batten fixedly installed on the surface of base, two vertical batten between fixedly installed with slide bar, the outer wall surface of slide bar is slidably connected with two slides, the side of two slides is fixedly installed with limit ring, the utility model is driven T type plate along vertical groove by limit device, cooperate hinged plate to drive two limit rings along slide bar synchronous approach or away, it can quickly position packaging bag roll in the central position of unwinding roller, the cooperation of its T type plate sliding and hinged plate rotation ensures the high synchronism of limit ring movement, positioning deviation is small, not only avoid the edge cutting misregistration caused by material roll deviation in unwinding process, reduce manual adjustment step to reduce operating strength, also provide the basis for the precision of subsequent edge cutting, to reduce the waste piece caused by inaccurate positioning.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag trimming technology, and in particular to a trimming device for processing plastic packaging bags. Background Technology

[0002] Plastic packaging bags can be classified by material into OPP, CPP, PP, PE, PVA, EVA, composite bags, co-extruded bags, etc. They are used for packaging various products in production and daily life, and are widely used in daily life and industrial production. Most commonly used plastic packaging bags are made of polyethylene film, which is non-toxic and therefore can be used to hold food.

[0003] A cutting device for processing plastic packaging bags, with publication number CN222698037U, is described. This patent uses a heated cutting blade that moves from one edge of a heating groove to the other. During this process, the cutting blade passes over the area of ​​the plastic packaging bag to be cut and presses it into the heating groove and the cutting seam. The cutting blade also begins cutting during the pressing process. After the area of ​​the plastic packaging bag to be cut enters the heating groove, it is immediately heated by two second electric heating plates. This allows the area of ​​the plastic packaging bag to be cut to absorb heat in a short time, making the cutting process smoother and more successful.

[0004] The inventors discovered in their daily work that the aforementioned edge-trimming device for processing plastic packaging bags requires placing the bag individually on a support plate and manually adjusting the edge to be trimmed to be below the cutter for each cut. This involves multiple steps per operation (placement → positioning → cutting → removal) and long intervals. For batch cutting (e.g., hundreds of bags), the overall time consumption increases significantly, failing to meet the needs of large-scale production. Furthermore, the repetitive "placement + positioning" actions are highly dependent on manual labor, and each positioning requires precise adjustments (to ensure the edge to be trimmed is aligned with the cutter), resulting in high operational intensity. After prolonged operation, fatigue can easily lead to malfunctions in the device's movements, further affecting efficiency and accuracy. Utility Model Content

[0005] The purpose of this utility model is to solve the problems mentioned above in the background art by proposing an edge trimming device for processing plastic packaging bags.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a trimming device for processing plastic packaging bags, comprising a base, a vertical plate fixedly installed on the surface of the base, a rotating shaft rotatably connected to the surface of the vertical plate via a bearing, an unwinding roller fixedly installed on the outer wall surface of the rotating shaft, a limiting device provided on the surface of the base, the limiting device comprising two vertical plates fixedly installed on the surface of the base, a sliding rod fixedly installed between the two vertical plates, two sliding plates slidably connected to the outer wall surface of the sliding rod, and a limiting ring fixedly installed on the side of each of the two sliding plates.

[0007] Preferably, an L-shaped bracket is fixedly installed on the surface of the base, and a vertical groove is formed on the inner wall surface of the vertical end of the L-shaped bracket, and a T-shaped plate is slidably connected inside the vertical groove.

[0008] Preferably, the bottom surface of the T-shaped plate is hinged with two hinge plates, and the end of the hinge plate away from the T-shaped plate is hinged to the sliding plate.

[0009] Preferably, a first electric telescopic rod is fixedly installed on the surface of the top horizontal end of the L-shaped bracket, and the output end of the first electric telescopic rod is fixedly connected to the T-shaped plate.

[0010] The aforementioned components achieve the following effect: by using the first electric telescopic rod to drive the T-shaped plate to move along the vertical groove, and in conjunction with the hinge plate to drive the two limiting rings to move synchronously closer or further away along the slide bar, the packaging bag roll can be quickly positioned in the center of the unwinding roller. The cooperation between the sliding of the T-shaped plate and the rotation of the hinge plate ensures high synchronicity of the movement of the limiting rings and small positioning deviation. This not only avoids edge misalignment caused by roll material deviation during unwinding and reduces manual adjustment steps to reduce operational intensity, but also provides a foundation for the accuracy of subsequent edge trimming, thereby reducing waste sheets caused by inaccurate positioning.

[0011] Preferably, a U-shaped frame is fixedly installed on the surface of the base. Two cylinders and a PLC controller are fixedly installed on the top surface of the horizontal end of the U-shaped frame. A hot cutting blade is fixedly installed at the output end of the two cylinders. A heating wire is provided inside the blade housing of the hot cutting blade. A support plate is fixedly installed between the inner walls on both sides of the U-shaped frame. A cutting groove is opened on the surface of the support plate. The hot cutting blade, cylinders, and first electric telescopic rod are all electrically connected to the PLC controller.

[0012] Preferably, a clamping device is provided on the surface of each vertical end of the U-shaped frame. The clamping device includes two support rods fixedly installed on the surface of each vertical end of the U-shaped frame. A placement plate is fixedly installed on the surface of the two support rods away from the U-shaped frame. An L-shaped rod is fixedly installed on one side surface of the placement plate. A limit plate is fixedly installed on the surface of the L-shaped rod away from the placement plate.

[0013] Preferably, a movable plate is slidably connected to the outer wall surface of the vertical end of the L-shaped rod, and a U-shaped plate is fixedly installed on the side surface of the placement plate away from the L-shaped rod. A groove is formed on the inner wall surface of the vertical end of the U-shaped plate, and a movable plate is slidably connected inside the groove. A clamping plate is fixedly installed between the movable plate and the movable plate.

[0014] Preferably, a second electric telescopic rod is fixedly installed on the surface of the top horizontal end of the U-shaped plate, the output end of the second electric telescopic rod is fixedly connected to the moving plate, and the second electric telescopic rod is electrically connected to the PLC controller.

[0015] The effect achieved by the above components is as follows: the pressure plate is moved down by the second electric telescopic rod, which, together with the placement plate and the carrier plate, forms a firm clamp on the packaging bag, preventing the material from slipping due to the force of the hot cutting blade during cutting, ensuring neat cut edges and improving product quality.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0017] In this invention, by setting a limiting device, the T-shaped plate is driven to move along the vertical groove by the first electric telescopic rod. In conjunction with the hinge plate, the two limiting rings move synchronously closer or further away along the slide rod. This allows the packaging bag roll to be quickly positioned in the center of the unwinding roller. The cooperation between the sliding of the T-shaped plate and the rotation of the hinge plate ensures high synchronicity of the movement of the limiting rings and small positioning deviation. This not only avoids edge misalignment caused by roll material deviation during unwinding and reduces manual adjustment steps to lower operational intensity, but also provides a foundation for the accuracy of subsequent edge trimming, thereby reducing waste caused by inaccurate positioning. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the limiting device of this utility model;

[0020] Figure 3 This utility model Figure 1 A schematic diagram of the decomposed structure;

[0021] Figure 4 This is a schematic diagram of the pressing device of this utility model.

[0022] Legend: 1. Base; 2. Limiting device; 21. Vertical bar; 22. Sliding rod; 23. Slide plate; 24. Limiting ring; 25. L-shaped bracket; 26. Vertical groove; 27. T-shaped plate; 28. Hinge plate; 29. ​​First electric telescopic rod; 3. Pressing device; 301. Support rod; 302. Placement plate; 303. L-shaped rod; 304. Movable plate; 305. Limiting plate; 306. U-shaped plate; 307. Vertical groove; 308. Moving plate; 309. Pressing plate; 310. Second electric telescopic rod; 4. Vertical plate; 5. Rotating shaft; 6. Unwinding roller; 7. U-shaped frame; 8. Cylinder; 9. Hot cutting knife; 10. Bearing plate; 11. Cutting groove; 12. PLC controller. Detailed Implementation

[0023] Example 1, as Figure 1-4As shown, a trimming device for processing plastic packaging bags includes a base 1, a vertical plate 4 fixedly mounted on the surface of the base 1, a rotating shaft 5 rotatably connected to the surface of the vertical plate 4 via bearings, a unwinding roller 6 fixedly mounted on the outer wall surface of the rotating shaft 5, a U-shaped frame 7 fixedly mounted on the surface of the base 1, two cylinders 8 and a PLC controller 12 fixedly mounted on the top surface of the horizontal end of the U-shaped frame 7, a hot cutting blade 9 fixedly mounted on the output end of the two cylinders 8, a heating wire provided inside the blade housing of the hot cutting blade 9, and the inner walls of both sides of the U-shaped frame 7... A support plate 10 is fixedly installed between them. The surface of the support plate 10 is provided with a cutting groove 11. The hot cutting knife 9, the cylinder 8, and the first electric telescopic rod 29 are all electrically connected to the PLC controller 12. The cylinder 8 is model SC63-100, with a stroke of 80mm and a speed of 200mm / s. The PLC controller 12 is model S7-1200, with a signal delay of ≤0.5s. The cutting edge angle of the hot cutting knife 9 is 30°, the built-in heating wire has a power of 500W, and the working temperature is 180±10℃.

[0024] Reference Figure 1-2 As shown in this embodiment: a limiting device 2 is provided on the surface of the base 1. The limiting device 2 includes two vertical strips 21 fixedly installed on the surface of the base 1. A slide rod 22 is fixedly installed between the two vertical strips 21. Two sliding plates 23 are slidably connected to the outer wall surface of the slide rod 22. Limiting rings 24 are fixedly installed on the sides of the two sliding plates 23. An L-shaped bracket 25 is fixedly installed on the surface of the base 1. A vertical groove 26 is opened on the inner wall surface of the vertical end of the L-shaped bracket 25. A T-shaped plate 27 is slidably connected inside the vertical groove 26. Two hinges are hinged to the bottom surface of the T-shaped plate 27. Plate 28, hinge plate 28 is hinged to the end away from T-shaped plate 27 and slide plate 23. The surface of the top horizontal end of L-shaped bracket 25 is fixedly installed with first electric telescopic rod 29. The output end of first electric telescopic rod 29 is fixedly connected to T-shaped plate 27. The fit clearance between slide plate 23 and slide rod 22 is ≤0.3mm, the sliding resistance is ≤8N, the fit clearance between limit ring 24 and unwinding roller 6 is ≤1mm, and its inner wall is provided with anti-slip rubber ring. The model of first electric telescopic rod 29 is DTI-50, the stroke is 150mm, the thrust is 600N, and the response time is ≤0.3s.

[0025] Reference Figure 3-4As shown in this embodiment: A clamping device 3 is provided on the surface of each vertical end of the U-shaped frame 7. The clamping device 3 includes two support rods 301 fixedly installed on the surface of each vertical end of the U-shaped frame 7. A placement plate 302 is fixedly installed on the surface of the two support rods 301 away from the U-shaped frame 7. An L-shaped rod 303 is fixedly installed on one side surface of the placement plate 302. A limit plate 305 is fixedly installed on the surface of the L-shaped rod 303 away from the placement plate 302. A movable plate 304 is slidably connected to the outer wall surface of the vertical end of the L-shaped rod 303. A U-shaped plate 306 is fixedly installed on the surface of the placement plate 302 away from the L-shaped rod 303. A groove 307 is formed on the inner wall surface of the vertical end of U-shaped plate 306. A movable plate 308 is slidably connected inside the groove 307. A pressing plate 309 is fixedly installed between the movable plate 308 and the movable plate 304. A second electric telescopic rod 310 is fixedly installed on the surface of the top horizontal end of U-shaped plate 306. The output end of the second electric telescopic rod 310 is fixedly connected to the movable plate 308. The second electric telescopic rod 310 is electrically connected to the PLC controller 12. A 3mm silicone pad is pasted on the bottom of the pressing plate 309. The anti-slip coefficient is ≥0.9. The model of the second electric telescopic rod 310 is DTI-30, with a stroke of 60mm and a pressure of 400N.

[0026] Working principle: When using this device, first check whether the base 1 is placed stably, whether the rotating shaft 5 on the upright plate 4 rotates smoothly, and whether the surface of the unwinding roller 6 is clean. Ensure that all parts are firmly connected and without jamming. Then, pass the packaging bag roll through the inside of one of the limiting rings 24 and place it on the surface of the unwinding roller 6. Next, start the first electric telescopic rod 29 through the PLC controller 12. The output end of the first electric telescopic rod 29 pushes the T-shaped plate 27 to slide upward along the vertical groove 26. When the T-shaped plate 27 moves, it drives the two hinged plates 28 at the bottom to rotate synchronously. The hinged plates 28 pull the two sliding plates 2 3. Slide along the slide bar 22 towards each other, thereby driving the two limiting rings 24 to move synchronously and fit against both sides of the packaging bag roll, achieving centering positioning of the packaging bag roll and avoiding lateral displacement during unwinding. After positioning, pull the open end of the packaging bag roll so that it passes under the hot cutter 9 and lies flat on the surface of the support plate 10 and the placement plate 302 until the position of the packaging bag to be cut is aligned with the cutting groove 11. At this time, the PLC controller 12 sends a signal to start the second electric telescopic rod 310. The output end of the second electric telescopic rod 310 pushes the moving plate 308 along the groove 30. 7. Slide downwards. The moving plate 308 drives the pressing plate 309 and the movable plate 304 to move downwards simultaneously. The movable plate 304 slides stably along the vertical end of the L-shaped rod 303. Finally, the pressing plate 309 tightly presses the packaging bag onto the surface of the placement plate 302 and the carrier plate 10 to prevent the packaging bag from shifting during edge cutting. After pressing is completed, the PLC controller 12 controls the cylinder 8 to start. The output end of the cylinder 8 pushes the hot cutting blade 9 downwards. At the same time, the heating wire inside the hot cutting blade 9 starts working, so that the blade reaches the temperature required for cutting. The hot cutting blade 9, in conjunction with the cutting groove 11 on the surface of the carrier plate 10, quickly completes the cutting of the packaging bag. After a single cut is completed, the PLC controller 12 controls the cylinder 8 and the second electric telescopic rod 310 to reset, the hot cutting blade 9 rises and leaves the cutting groove 11, and the pressing plate 309 moves up to loosen the packaging bag. At this time, it is only necessary to pull the open end of the next section of the packaging bag to move it to the appropriate position and repeat the above pressing and cutting steps to achieve continuous batch cutting. Through the above process, the device realizes continuous feeding, automatic positioning, stable pressing and efficient cutting of packaging bags, which greatly reduces the number of manual operation steps. It is especially suitable for large-scale production scenarios and effectively improves cutting efficiency and accuracy.

[0027] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A trimming device for processing plastic packaging bags, comprising a base (1), wherein a vertical plate (4) is fixedly mounted on the surface of the base (1), and a rotating shaft (5) is rotatably connected to the surface of the vertical plate (4) via a bearing, and an unwinding roller (6) is fixedly mounted on the outer wall surface of the rotating shaft (5), characterized in that: The base (1) is provided with a limiting device (2). The limiting device (2) includes two vertical strips (21) fixedly installed on the surface of the base (1). A slide rod (22) is fixedly installed between the two vertical strips (21). Two slide plates (23) are slidably connected to the outer wall surface of the slide rod (22). Limiting rings (24) are fixedly installed on the sides of the two slide plates (23).

2. The edge-trimming device for processing plastic packaging bags according to claim 1, characterized in that: An L-shaped bracket (25) is fixedly installed on the surface of the base (1). A vertical groove (26) is opened on the inner wall surface of the vertical end of the L-shaped bracket (25). A T-shaped plate (27) is slidably connected inside the vertical groove (26).

3. The edge-trimming device for processing plastic packaging bags according to claim 2, characterized in that: The bottom surface of the T-shaped plate (27) is hinged with two hinge plates (28), and the end of the hinge plate (28) away from the T-shaped plate (27) is hinged to the slide plate (23).

4. The edge-trimming device for processing plastic packaging bags according to claim 3, characterized in that: The first electric telescopic rod (29) is fixedly installed on the surface of the top horizontal end of the L-shaped bracket (25), and the output end of the first electric telescopic rod (29) is fixedly connected to the T-shaped plate (27).

5. The edge-trimming device for processing plastic packaging bags according to claim 4, characterized in that: A U-shaped frame (7) is fixedly installed on the surface of the base (1). Two cylinders (8) and a PLC controller (12) are fixedly installed on the top surface of the horizontal end of the U-shaped frame (7). A hot cutting knife (9) is fixedly installed at the output end of the two cylinders (8). A heating wire is provided inside the blade shell of the hot cutting knife (9). A bearing plate (10) is fixedly installed between the inner walls on both sides of the U-shaped frame (7). A cutting groove (11) is opened on the surface of the bearing plate (10). The hot cutting knife (9), cylinders (8), and first electric telescopic rod (29) are all electrically connected to the PLC controller (12).

6. The edge-trimming device for processing plastic packaging bags according to claim 5, characterized in that: The surfaces of the vertical ends of the U-shaped frame (7) are provided with clamping devices (3). The clamping devices (3) include two support rods (301) fixedly installed on the surfaces of the vertical ends of the U-shaped frame (7). A placement plate (302) is fixedly installed on the surface of the two support rods (301) away from the U-shaped frame (7). An L-shaped rod (303) is fixedly installed on one side surface of the placement plate (302). A limit plate (305) is fixedly installed on the surface of the L-shaped rod (303) away from the placement plate (302).

7. The edge-trimming device for processing plastic packaging bags according to claim 6, characterized in that: A movable plate (304) is slidably connected to the outer wall surface of the vertical end of the L-shaped rod (303). A U-shaped plate (306) is fixedly installed on the side surface of the placement plate (302) away from the L-shaped rod (303). A groove (307) is opened on the inner wall surface of the vertical end of the U-shaped plate (306). A movable plate (308) is slidably connected inside the groove (307). A pressing plate (309) is fixedly installed between the movable plate (308) and the movable plate (304).

8. The edge-trimming device for processing plastic packaging bags according to claim 7, characterized in that: A second electric telescopic rod (310) is fixedly installed on the surface of the top horizontal end of the U-shaped plate (306). The output end of the second electric telescopic rod (310) is fixedly connected to the moving plate (308). The second electric telescopic rod (310) is electrically connected to the PLC controller (12).

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