Polypropylene packaging bag film cutting device

Abstract

The utility model relates to a polypropylene packaging bag film cutting device which comprises a slitting plate, winding structures are arranged on the two sides of the top end of the slitting plate, supporting frames are fixedly arranged on the two sides of the slitting plate, a transverse stretching roller is arranged between the two supporting frames, pressing guide rails are arranged at the upper ends of the supporting frames, and a pressing rod is arranged on the two pressing guide rails in a sliding mode. The utility model relates to the technical field of polypropylene packaging bag production. According to the polypropylene packaging bag film cutting device, the pressing rod is pressed at the upper end of the elastic sleeve and located in the center of the elastic sleeve, the side, subjected to pressure, of the elastic sleeve shrinks inwards, the connecting discs on the two sides are pulled to incline through shrinkage of the elastic sleeve, and at the moment, the position, making contact with a polypropylene material film, of the bottom side of the elastic sleeve expands towards the two sides; and therefore, the polypropylene material film can be effectively stretched towards the two sides, and the purpose of uniform cutting of the cutting disc is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of polypropylene packaging bag production technology, and in particular to a polypropylene packaging bag film cutting device. Background Technology

[0002] Polypropylene packaging bags, commonly known as plastic bags, are everyday items made from polypropylene material and used to hold items. The process of manufacturing polypropylene packaging bags involves first producing a whole polypropylene material, which is then cut into multiple polypropylene packaging bags. A film cutting device is required when cutting the polypropylene material.

[0003] Chinese Patent Publication No. CN221417573U discloses a polypropylene packaging bag cutting device, including a mounting plate and multiple support rods fixedly connected to the bottom of the mounting plate. It also includes: a winding structure mounted on the mounting plate for winding polypropylene material to facilitate subsequent film cutting; and a cutting structure mounted on the mounting plate for cutting the polypropylene material. This polypropylene packaging bag cutting device winds the polypropylene material onto a winding shaft, then winds one end of the material onto a receiving roller. A motor drives the receiving roller to rotate, straightening and collecting the polypropylene material. During the movement of the polypropylene material, a cutting motor drives a cutting blade to rotate, cutting the polypropylene material. This device facilitates straightening of the polypropylene material and improves the cutting efficiency.

[0004] In the aforementioned patent, the material is tightened by a winding mechanism and a collecting roller, and then cut by a cutting motor. However, when the polypropylene material is stretched to both ends, the two sides of the material will gather inward and form wrinkles. The aforementioned patent cannot stretch the polypropylene material to both sides, so it is easy to have inaccurate cutting problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a polypropylene packaging bag cutting device to solve the technical problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A polypropylene packaging bag cutting device includes a cutting plate, with a winding structure on both sides of the top of the cutting plate, and a support frame fixedly installed on both sides of the cutting plate. A transverse stretching roller is installed between the two support frames, and a pressing guide rail is installed at the upper end of the support frame. A pressing rod is slidably installed on the two pressing guide rails.

[0008] The transverse stretching roller includes a connecting shaft, which has two shafts and is rotatably connected to two support frames respectively. A connecting plate is provided at the end of the connecting shaft away from the support frame, and the connecting plate is connected to the connecting shaft through a first universal joint. The outer peripheral walls of the two connecting plates are fitted with elastic sleeves.

[0009] Furthermore, the winding structure includes a guide frame, which is fixedly mounted on the side wall of the slitting plate, and a rotating groove is provided at the top of the guide frame, with a winding roller rotatably mounted inside the rotating groove.

[0010] Furthermore, the pressing rod includes a sliding rod, with sliding blocks rotatably disposed at both ends of the sliding rod. The sliding blocks are inserted into the inside of the pressing guide rail and are slidably connected to the pressing guide rail. A pressing platform is fixedly disposed on the outer peripheral wall of the sliding rod.

[0011] Furthermore, the interior of the elastic sleeve is provided with a mesh skeleton.

[0012] Furthermore, a telescopic rod is provided on the opposite side of both connecting discs, and a second universal joint is provided at the connection between the telescopic rod and the connecting disc.

[0013] Furthermore, the slitting plate is equipped with a film cutting saw blade inside, and a drive motor is installed at the axis of the film cutting saw blade, with the drive motor fixedly connected to the bottom end of the slitting plate.

[0014] In summary, this utility model has at least one of the following beneficial technical effects:

[0015] 1. A polypropylene packaging bag film cutting device, wherein the pressure rod presses on the upper end of the elastic sleeve and is located at the center of the elastic sleeve. The side of the elastic sleeve subjected to pressure contracts inward. The contraction of the elastic sleeve pulls the connecting discs on both sides to tilt. At this time, the bottom side of the elastic sleeve in contact with the polypropylene material film will expand to both sides, thereby effectively stretching the polypropylene material film to both sides so as to facilitate the cutting disc to cut evenly.

[0016] 2. The polypropylene packaging bag film cutting device uses a sliding block to install a sliding rod, and a pressing table is installed through the sliding rod. By pressing the hydraulic telescopic rod set inside the guide rail, downward pressure is applied to the sliding block, so that the pressing table presses against the top of the elastic sleeve, thereby making the elastic sleeve form an arc shape to facilitate the stretching of the polypropylene material film. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a polypropylene packaging bag cutting device according to the present invention.

[0019] Figure 2 This is a schematic diagram of the pressure rod and transverse stretching roller of a polypropylene packaging bag cutting device according to the present invention.

[0020] Figure 3 This is a schematic diagram of the elastic sleeve and mesh skeleton of a polypropylene packaging bag cutting device according to the present invention.

[0021] Figure 4 This is a schematic diagram of the planar structure of the transverse stretching roller of a polypropylene packaging bag cutting device according to the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of a polypropylene packaging bag cutting device of this utility model after the polypropylene material film is installed.

[0023] In the diagram, 1. Slitting plate; 2. Rewinding structure; 21. Guide frame; 22. Rotating groove; 23. Rewinding roller; 3. Support frame; 4. Transverse stretching roller; 41. Connecting shaft; 42. Connecting disc; 43. First universal joint; 44. Elastic sleeve; 45. Mesh frame; 46. Telescopic rod; 5. Pressing guide rail; 6. Pressing rod; 61. Sliding rod; 62. Sliding block; 63. Pressing table; 7. Film cutting saw blade. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings. Example

[0025] Reference Figure 1 - Figure 5 This utility model discloses a polypropylene packaging bag cutting device, including a cutting plate 1, a winding structure 2 on both sides of the top of the cutting plate 1, a support frame 3 fixedly installed on both sides of the cutting plate 1, a transverse stretching roller 4 jointly installed between the two support frames 3, a stretching motor installed on the side wall of the support frame 3, the motor shaft of the stretching motor being fixedly connected to the side wall of the transverse stretching roller 4 for driving the stretching roller to rotate, a pressing guide rail 5 installed at the upper end of the support frame 3, and a pressing rod 6 slidably installed on the two pressing guide rails 5.

[0026] The transverse stretching roller 4 includes a connecting shaft 41. Two connecting shafts 41 are provided and are rotatably connected to two support frames 3 respectively. A connecting plate 42 is provided at the end of the connecting shaft 41 away from the support frame 3. The connecting plate 42 is connected to the connecting shaft 41 through a first universal joint 43. The outer peripheral walls of the two connecting plates 42 are jointly fitted with an elastic sleeve 44.

[0027] In this embodiment, as Figure 1 The diagram shows the overall structure of the film cutting device. In use, the polypropylene film is placed on the winding structure 2, stretched to pass through the bottom end of the transverse stretching roller 4, and then wound onto another winding structure 2, as shown. Figure 5 As shown;

[0028] Then push the pressure rod 6 downwards, so that the pressure rod 6 presses against the upper end of the elastic sleeve 44 and is located at the center of the elastic sleeve 44. At this time, the side of the elastic sleeve 44 under pressure contracts inwards, which will pull the connecting plates 42 on both sides to tilt. Figure 4 As shown, at this time, the bottom side of the elastic sleeve 44 will expand to both sides where it contacts the polypropylene material film, thereby effectively stretching the polypropylene material film to both sides so as to facilitate uniform cutting by the cutting disc.

[0029] In a further preferred embodiment of this utility model, such as Figure 1 As shown, the winding structure 2 includes a guide frame 21, which is fixedly mounted on the side wall of the slitting plate 1. A rotating groove 22 is provided at the top of the guide frame 21, and a winding roller 23 is rotatably mounted inside the rotating groove 22. A drive motor is provided on the side wall of the guide frame 21 to drive the winding roller 23 to rotate.

[0030] In this embodiment, as Figure 1 The take-up roller 23 is mounted above the guide frame 21 via a rotating groove 22. When collecting and cutting the polypropylene film, the central shaft of the polypropylene film is sleeved on the outer wall of the take-up roller 23, and the polypropylene film is stretched to pass through the bottom end of the transverse stretching roller 4, and then wound onto another take-up structure 2, as described above. Figure 5 As shown.

[0031] In a further preferred embodiment of this utility model, such as Figure 2 As shown, the pressing rod 6 includes a sliding rod 61, and sliding blocks 62 are rotatably provided at both ends of the sliding rod 61. The sliding blocks 62 are inserted into the inside of the pressing guide rail 5 and are slidably connected with the pressing guide rail 5. A pressing platform 63 is fixedly provided on the outer peripheral wall of the sliding rod 61.

[0032] In this embodiment, as Figure 2 As shown, the sliding block 62 is used to install the sliding rod 61, and the pressing table 63 is installed through the sliding rod 61. By pressing the hydraulic telescopic rod 46 provided inside the guide rail 5, downward pressure is applied to the sliding block 62, so that the pressing table 63 presses against the top of the elastic sleeve 44, thereby making the elastic sleeve 44 form an arc shape, so as to facilitate the stretching of the polypropylene material film.

[0033] In a further preferred embodiment of this utility model, such as Figure 3As shown, the elastic sleeve 44 has a mesh skeleton 45 inside.

[0034] In this embodiment, as Figure 3 As shown, the mesh skeleton 45 is located inside the elastic sleeve 44, and the annular skeleton is the skeleton and the strip skeleton is the elastic skeleton, so as to keep the elastic sleeve 44 in a cylindrical state and enable the elastic sleeve 44 to bend into an arc shape.

[0035] In a further preferred embodiment of this utility model, such as Figure 2 , 4 As shown, the two connecting discs 42 are provided with a telescopic rod 46 on opposite sides, and a second universal joint is provided at the connection between the telescopic rod 46 and the connecting disc 42.

[0036] In this embodiment, the telescopic rod 46 and the second universal joint are used to connect the two connecting discs 42, so that the two connecting discs 42 can rotate synchronously.

[0037] In a further preferred embodiment of this utility model, such as Figure 1 , 2 As shown, the cutting plate 1 is provided with a film cutting saw blade 7 inside, and a drive motor is provided at the axis of the film cutting saw blade 7. The drive motor is fixedly connected to the bottom end of the cutting plate 1.

[0038] In this embodiment, the film cutting saw blade 7 is used to cut the polypropylene material film.

[0039] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A polypropylene packaging bag cutting device, characterized in that, It includes a slitting plate (1), a winding structure (2) on both sides of the top of the slitting plate (1), a support frame (3) fixedly installed on both sides of the slitting plate (1), a transverse stretching roller (4) is provided between the two support frames (3), a pressing guide rail (5) is provided at the upper end of the support frame (3), and a pressing rod (6) is slidably installed on the two pressing guide rails (5). The transverse stretching roller (4) includes a connecting shaft (41). The connecting shaft (41) has two shafts and is rotatably connected to two support frames (3). The end of the connecting shaft (41) away from the support frame (3) is provided with a connecting plate (42), and the connecting plate (42) is connected to the connecting shaft (41) through a first universal joint (43). The outer peripheral walls of the two connecting plates (42) are jointly fitted with an elastic sleeve (44).

2. The polypropylene packaging bag cutting device according to claim 1, characterized in that, The winding structure (2) includes a guide frame (21), which is fixedly installed on the side wall of the slitting plate (1), and a rotating groove (22) is provided at the top of the guide frame (21), and a winding roller (23) is rotatably installed inside the rotating groove (22).

3. The polypropylene packaging bag cutting device according to claim 2, characterized in that, The pressing rod (6) includes a sliding rod (61), and sliding blocks (62) are rotatably provided at both ends of the sliding rod (61). The sliding blocks (62) are inserted into the inside of the pressing guide rail (5) and are slidably connected with the pressing guide rail (5). A pressing table (63) is fixedly provided on the outer peripheral wall of the sliding rod (61).

4. The polypropylene packaging bag cutting device according to claim 3, characterized in that, The elastic sleeve (44) is provided with a mesh skeleton (45) inside.

5. A polypropylene packaging bag cutting device according to claim 4, characterized in that, The two connecting discs (42) are provided with a telescopic rod (46) on opposite sides, and a second universal joint is provided at the connection between the telescopic rod (46) and the connecting disc (42).

6. The polypropylene packaging bag cutting device according to claim 5, characterized in that, The cutting plate (1) is provided with a film cutting saw blade (7) inside, and a drive motor is provided at the axis of the film cutting saw blade (7), and the drive motor is fixedly connected to the bottom end of the cutting plate (1).

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