Bag cutting device for plastic bag production

Abstract

The utility model belongs to the field of bag cutting devices, and particularly relates to a bag cutting device for plastic bag production, which comprises a base, a frame is mounted at the upper end of the base, a moving column is slidably connected to the inside of the frame, a cut-off tool is fixedly connected to the lower end of the moving column, and a tensioning mechanism is arranged on the outer side of the cut-off tool. Two symmetrically-distributed supporting plates are fixedly connected to the upper end of the frame, and a rotating shaft is jointly installed in the two supporting plates through bearings. According to the plastic bag cutting device, the cam, the movable column, the cut-off tool and other structures are additionally arranged on the frame, when a plastic bag is cut, the cam can be driven by the motor to rotate, and the movable column and the cut-off tool are driven by the driving ring to move up and down in the rotating process of the cam; and the cut-off tool can cut the plastic bag in the up-down moving process, so that the plastic bag deformation caused by electric heating wire cutting can be effectively avoided, and the stability of the plastic bag is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of bag cutting devices, specifically a bag cutting device for plastic bag production. Background Technology

[0002] In the production process of plastic bags, the produced plastic bags need to be cut. According to patent authorization announcement number CN112406180B, an environmentally friendly plastic bag cutting device is disclosed. This invention discloses an environmentally friendly plastic bag cutting device, the cutting mechanism comprising two sets of parallel extrusion belts. Conductive plates are installed on the inner walls of both sides of the protective cover, and are closest to the inner wall of the extrusion belt. Batteries located inside the conductive plates are electrically connected to several sets of electromagnetic coils installed inside the extrusion belts. Multiple sets of cutting plates are connected at equal intervals between the two sets of extrusion belts, and heating wires are installed inside the cutting plates. This invention provides an environmentally friendly plastic bag cutting device that, by setting extrusion belts inside the cutting mechanism and installing heating wires inside the extrusion belts, can cut plastic bags during transportation.

[0003] However, in existing technologies for thermal cutting of plastic bags, the temperature of the heating wire is too high, which can easily cause the plastic bag to stick to the outside of the heating wire during the cutting process. This causes the plastic bag to deform, leading to an increased defect rate. Furthermore, the plastic bag cannot be taut during the cutting process, causing cutting deviation and affecting the cutting quality. Therefore, improvements to the existing technology are needed. Utility Model Content

[0004] The purpose of this invention is to provide a bag cutting device for plastic bag production, which solves the problems of plastic bag deformation and miscutting during the cutting process caused by electric heating wire cutting.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bag cutting device for plastic bag production, comprising a base, a frame mounted on the upper end of the base, a movable column slidably connected inside the frame, a cutting blade fixedly connected to the lower end of the movable column, a tensioning mechanism provided on the outer side of the cutting blade, two symmetrically distributed support plates fixedly connected to the upper end of the frame, a rotating shaft mounted inside the two support plates via a bearing, two symmetrically distributed cams fixedly connected to the outer side of the rotating shaft, a drive ring fixedly connected to the upper end of the movable column, a spring provided on the outer side of the movable column, a motor fixedly mounted to the upper end of the frame, a gear fixedly connected to the outer side of the rotating shaft, and a gear fixedly connected to the outer side of the output shaft of the motor.

[0006] Preferably, a grooving plate is fixedly connected to the upper end of the base, and the grooving plate is located directly below the cutting blade, guiding the cutting blade's cutting action.

[0007] Preferably, a stabilizing frame is fixedly connected to the upper middle part of the frame, and the stabilizing frame is connected to the rotating shaft through a bearing. The stabilizing frame can increase the rotational stability of the rotating shaft.

[0008] Preferably, one end of the spring is fixedly connected to the drive ring, and the other end of the spring is fixedly connected to the frame. The spring can automatically reset the drive ring through its elastic force.

[0009] Preferably, the cam is slidably connected to the drive ring, and the second gear meshes with the first gear. The cam can drive the drive ring to move up and down by rotating.

[0010] Preferably, the tensioning mechanism includes a fixed plate, two symmetrically distributed fixed plates are fixedly connected to the outer side of the cutting blade, a plurality of evenly distributed guide rods are slidably connected inside the fixed plate, a squeezing plate is fixedly connected to the lower end of the guide rod, an anti-slip strip is fixedly connected to the lower end of the squeezing plate, and a spring is provided on the outer side of the guide rod. The squeezing plate can squeeze and tension the plastic bag through the anti-slip strip.

[0011] Preferably, one end of the second spring is fixedly connected to the fixed plate, and the other end of the second spring is fixedly connected to the extrusion plate. The second spring can support the extrusion plate through its elastic force.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model adds a cam, a moving column, and a cutting blade to the frame. When cutting plastic bags, the cam is driven by a motor to rotate. During the rotation of the cam, the moving column and the cutting blade move up and down through the drive ring. The cutting blade can cut the plastic bag during the up and down movement, thereby effectively avoiding the deformation of the plastic bag caused by the hot wire cutting.

[0014] 2. This utility model adds a fixing plate, guide rod and extrusion plate to the cutting blade. When the plastic bag needs to be cut by the cutting blade, the anti-slip strip under the extrusion plate is in contact with the plastic bag in advance. Then the plastic bag is tensioned by the elastic force of the second spring, which can effectively ensure the cutting quality. Attached Figure Description

[0015] Figure 1 This is a perspective view of the overall structure of this utility model;

[0016] Figure 2 For the present utility model Figure 1 A three-dimensional view of the local structure;

[0017] Figure 3For the present utility model Figure 2 A three-dimensional view of the extruded strip;

[0018] Figure 4 For the present utility model Figure 1 Enlarged view of the structure of part A.

[0019] In the diagram: 1. Base; 2. Frame; 3. Moving column; 4. Cutting blade; 5. Tensioning mechanism; 6. Grooving plate; 7. Support plate; 8. Rotating shaft; 9. Stabilizer; 10. Cam; 11. Drive ring; 13. Spring 1; 14. Gear 1; 15. Motor; 16. Gear 2; 51. Fixing plate; 52. Guide rod; 53. Extrusion plate; 54. Anti-slip strip; 55. Spring 2. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 , Figure 2 , Figure 4 A bag-cutting device for plastic bag production includes a base 1, a frame 2 mounted on the upper end of the base 1, a movable column 3 slidably connected inside the frame 2, a cutting blade 4 fixedly connected to the lower end of the movable column 3, a tensioning mechanism 5 provided on the outer side of the cutting blade 4, two symmetrically distributed support plates 7 fixedly connected to the upper end of the frame 2, a rotating shaft 8 mounted inside the two support plates 7 via bearings, two symmetrically distributed cams 10 fixedly connected to the outer side of the rotating shaft 8, a drive ring 11 fixedly connected to the upper end of the movable column 3, a spring 13 provided on the outer side of the movable column 3, a motor 15 fixedly mounted on the upper end of the frame 2, a gear 14 fixedly connected to the outer side of the rotating shaft 8, and a gear 2 16 fixedly connected to the outer side of the output shaft of the motor 15.

[0022] Please see Figure 1 , Figure 2 , Figure 4A grooving plate 6 is fixedly connected to the upper end of the base 1. The grooving plate 6 is located directly below the cutting blade 4. The grooving plate 6 guides the cutting of the cutting blade 4. A stabilizing frame 9 is fixedly connected to the middle of the upper end of the frame 2. The stabilizing frame 9 is connected to the rotating shaft 8 through a bearing. The stabilizing frame 9 can increase the rotational stability of the rotating shaft 8. One end of the spring 13 is fixedly connected to the drive ring 11, and the other end of the spring 13 is fixedly connected to the frame 2. The spring 13 can drive the drive ring 11 to automatically reset through elastic force. The cam 10 is slidably connected to the drive ring 11. The gear 16 meshes with the gear 14. The cam 10 can drive the drive ring 11 to move up and down by rotating.

[0023] Please see Figure 1 , Figure 2 , Figure 3 The tensioning mechanism 5 includes a fixed plate 51. Two symmetrically distributed fixed plates 51 are fixedly connected to the outside of the cutting blade 4. Multiple evenly distributed guide rods 52 are slidably connected inside the fixed plate 51. A compression plate 53 is fixedly connected to the lower end of the guide rod 52. An anti-slip strip 54 is fixedly connected to the lower end of the compression plate 53. A second spring 55 is provided on the outside of the guide rod 52. The compression plate 53 can compress and tension the plastic bag through the anti-slip strip 54. One end of the second spring 55 is fixedly connected to the fixed plate 51, and the other end of the second spring 55 is fixedly connected to the compression plate 53. The second spring 55 can support the compression plate 53 through its elasticity.

[0024] The specific implementation process of this utility model is as follows: When cutting the plastic bag, the motor 15 is started, and the motor 15 drives the gear 16 to rotate. The gear 16 drives the cam 10 on the outside of the rotating shaft 8 to rotate through the gear 14. During the rotation of the cam 10, the drive ring 11 moves up and down. During the up and down movement of the drive ring 11, the cutting blade 4 can be driven by the moving column 3 to cut the plastic bag. During the downward movement of the cutting blade 4, the anti-slip strip 54 under the extrusion plate 53 is in contact with the plastic bag in advance. During the continuous downward movement of the cutting blade 4, the spring 55 is compressed. The elastic force generated after the spring 55 is compressed can be used to position the plastic bag through the extrusion plate 53. Then the plastic bag can be switched by the cutting blade 4. During the repeated up and down movement of the cutting blade 4, a fixed length cut can be achieved.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bag-cutting device for plastic bag production, comprising a base (1), characterized in that: A frame (2) is installed on the upper end of the base (1). A movable column (3) is slidably connected inside the frame (2). A cutting blade (4) is fixedly connected to the lower end of the movable column (3). A tensioning mechanism (5) is provided on the outside of the cutting blade (4). Two symmetrically distributed support plates (7) are fixedly connected to the upper end of the frame (2). A rotating shaft (8) is installed inside the two support plates (7) through a bearing. Two symmetrically distributed cams (10) are fixedly connected to the outside of the rotating shaft (8). A drive ring (11) is fixedly connected to the upper end of the movable column (3). A spring (13) is provided on the outside of the movable column (3). A motor (15) is fixedly installed on the upper end of the frame (2). A gear (14) is fixedly connected to the outside of the rotating shaft (8). A gear (16) is fixedly connected to the outside of the output shaft of the motor (15).

2. The bag cutting device for plastic bag production according to claim 1, characterized in that: A grooving plate (6) is fixedly connected to the upper end of the base (1), and the grooving plate (6) is located directly below the cutting blade (4).

3. The bag cutting device for plastic bag production according to claim 1, characterized in that: A stabilizing frame (9) is fixedly connected to the upper middle part of the frame (2), and the stabilizing frame (9) is connected to the rotating shaft (8) through a bearing.

4. The bag cutting device for plastic bag production according to claim 1, characterized in that: One end of the spring (13) is fixedly connected to the drive ring (11), and the other end of the spring (13) is fixedly connected to the frame (2).

5. The bag cutting device for plastic bag production according to claim 1, characterized in that: The cam (10) is slidably connected to the drive ring (11), and the second gear (16) meshes with the first gear (14).

6. The bag cutting device for plastic bag production according to claim 1, characterized in that: The tensioning mechanism (5) includes a fixed plate (51). Two symmetrically distributed fixed plates (51) are fixedly connected to the outside of the cutting blade (4). Multiple evenly distributed guide rods (52) are slidably connected inside the fixed plate (51). A pressing plate (53) is fixedly connected to the lower end of the guide rod (52). An anti-slip strip (54) is fixedly connected to the lower end of the pressing plate (53). A spring (55) is provided on the outside of the guide rod (52).

7. A bag-cutting device for plastic bag production according to claim 6, characterized in that: One end of the second spring (55) is fixedly connected to the fixed plate (51), and the other end of the second spring (55) is fixedly connected to the compression plate (53).

Images