A plastic packaging bag cutting device

Abstract

The utility model belongs to the technical field of plastic packaging bag preparation, disclose a kind of cutting device of plastic packaging bag, including the cutting assembly for moving slide cut, further including the rack assembly for oblique conveying plastic packaging bag, rack assembly is equipped with the feeding assembly for rotating and blowing conveying plastic packaging bag in, cutting assembly is installed in the feeding assembly intermediate in rack assembly;Feeding assembly includes fixed rotary roller, and first motor is arranged in fixed rotary roller one end, and auxiliary mechanism is away from the side of fixed rotary roller and is provided with the lifting mechanism for moving up and down, and lifting mechanism bottom is equipped with movable rotary roller, and movable rotary roller one end is provided with second motor.The utility model discloses a kind of cutting device of plastic packaging bag, through the combination of machinery, pneumatic and electric control, solve the traditional production discontinuity, cutting bag is easily wrinkled, cutting is not complete, conveying is jammed and so on, significantly improve production efficiency, cutting quality and automation level, applicable to industrialization continuous production scene.

Description

Technical Field

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

[0002] Plastic packaging bags, as an indispensable daily necessity in modern life, are widely used in retail, logistics, and food preservation due to their lightweight, durability, and low cost. Their main raw materials are petroleum-based polymers such as polyethylene (PE) and polypropylene (PP), manufactured through blow molding or calendering processes. Based on their uses, they can be categorized into vest bags, tote bags, courier bags, and food contact bags, among others. Some products incorporate biodegradable components (such as PLA and PBAT) to reduce environmental impact. Bag cutting production begins with pre-made plastic rolls and is a crucial step in packaging manufacturing.

[0003] Comparing with Chinese Patent CN215098753U, an automatic bag-cutting device for food plastic packaging bags is disclosed, including a frame, an electrostatic eliminator, a traction conveying mechanism, and a bag-cutting mechanism. The electrostatic eliminator, traction conveying mechanism, and bag-cutting mechanism are sequentially arranged above the frame along the bag conveying direction. The traction conveying mechanism includes a first traction roller, a second traction roller, and pressure rollers. The first and second traction rollers are rotatably connected to the frame, and the rotational speed of the first traction roller is less than that of the second traction roller. Pressure rollers are located on both sides above the first and second traction rollers. The bag-cutting mechanism includes a cutting roller with a cutting blade. By eliminating static electricity, the packaging bag film is prevented from wrinkling due to electrostatic adhesion. The speed difference of the traction rollers tightens the packaging bag, preventing it from being too loose and causing wrinkles, which would affect the quality of bag cutting.

[0004] However, after the aforementioned patented plastic packaging bag is cut, it cannot be pushed forward to ensure continuous production, and the clamping and cutting method is prone to incomplete cutting. Therefore, a new type of equipment needs to be designed. Utility Model Content

[0005] The purpose of this invention is to provide a bag-cutting device for plastic packaging bags to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A bag-cutting device for plastic packaging bags includes a cutting assembly for movable sliding cutting and a frame assembly for tilting and conveying the plastic packaging bags. A feeding assembly for rotating and blowing the plastic packaging bags is installed within the frame assembly. The cutting assembly is installed in the middle of the feeding assembly within the frame assembly. The frame assembly includes a base with two symmetrically fixed support legs at one end. Two electric push rods are symmetrically rotatably mounted at the end of the base away from the support legs. A housing mechanism is rotatably mounted between the electric push rods and the support legs. The feeding assembly includes a fixed rotating roller with a first motor at one end. An auxiliary mechanism for tilting and forward blowing the plastic packaging bags is located on one side of the fixed rotating roller. A lifting mechanism for vertical movement is located on the side of the auxiliary mechanism away from the fixed rotating roller. A movable rotating roller is installed at the bottom of the lifting mechanism, and a second motor is located at one end of the movable rotating roller.

[0008] Furthermore: the cutting assembly includes a fixed frame, a linear guide rail is mounted under the fixed frame, a linear motor is mounted under the linear guide rail, and a sliding cutting mechanism is mounted under the linear motor.

[0009] Furthermore: the sliding cutting mechanism includes a connecting seat, and a sliding cutting blade is mounted below the connecting seat.

[0010] Furthermore: the chassis mechanism includes a chassis body, on both sides of the chassis body near the movable rotary roller are symmetrically provided with clearance grooves, a limit sliding groove is provided above the clearance groove, and a sliding cutting groove is fixedly provided at the bottom of the chassis body.

[0011] Furthermore: the chassis is a rectangular box shape with both ends open.

[0012] Furthermore: the auxiliary mechanism includes an air supply pipe frame, which is inverted T-shaped, and a plurality of air outlets are evenly installed on the bottom surface of the air supply pipe frame; the lifting mechanism includes a lifting frame, a telescopic cylinder is installed on the top of the lifting frame, and two limit sliders are symmetrically installed at both ends of the lifting frame.

[0013] Furthermore, the fixed rotating roller and the movable rotating roller are the same size, and both the first motor and the second motor are servo motors.

[0014] Compared with existing technologies, the beneficial effects are:

[0015] 1. By combining mechanical, pneumatic and electronic control, it solves the problems of discontinuous traditional production, easy wrinkling during bag cutting, incomplete cutting, and conveying jams, significantly improving production efficiency, cutting quality and automation level, and is suitable for industrial continuous production scenarios;

[0016] 2. The electric push rod and support legs work together to adapt to the conveying needs of packaging bags of different thicknesses or materials, enhancing versatility; the fixed and movable rollers work together to generate a pulling force through rotation, effectively flattening the packaging bag and avoiding wrinkles that could affect cutting accuracy; the air outlet of the air supply pipe frame sprays compressed air to reduce friction between the bag and the bottom of the machine, ensuring smooth conveying, especially suitable for thin bags;

[0017] 3. Both the first and second motors are servo motors, which precisely control the speed of the rotating rollers and have high synchronization, avoiding slippage or deviation of the conveyor. They can handle plastic packaging bags of different sizes and materials. By adjusting the tilt angle, air pressure and rotating roller speed, they can adapt to diverse production needs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a bag-cutting device for a plastic packaging bag according to the present invention;

[0019] Figure 2 This is an external view of the bag cutting device for plastic packaging bags described in this utility model;

[0020] Figure 3 This is a front perspective view of the frame assembly of the bag cutting device for plastic packaging bags according to the present invention;

[0021] Figure 4 This is an external view of the frame assembly of the bag cutting device for plastic packaging bags described in this utility model;

[0022] Figure 5 This is a schematic diagram of the cutting component of a bag cutting device for plastic packaging bags according to the present invention;

[0023] Figure 6 This is a top axonometric view of the feeding component of the bag cutting device for plastic packaging bags according to the present invention;

[0024] Figure 7 This is a bottom-view axonometric view of the feeding component of a bag-cutting device for plastic packaging bags according to the present invention.

[0025] In the attached diagram, the following are the reference numerals: 101, base; 102, electric push rod; 103, support leg; 104, chassis; 105, clearance groove; 106, limit slide groove; 107, sliding cutting groove; 201, fixed frame; 202, linear guide rail; 203, linear motor; 204, connecting seat; 205, sliding cutting blade; 301, fixed rotating roller; 302, first motor; 303, lifting frame; 304, telescopic cylinder; 305, limit slider; 306, movable rotating roller; 307, second motor; 308, air supply pipe frame; 309, air outlet. Detailed Implementation

[0026] 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.

[0027] Please see Figures 1-7 A bag cutting device for plastic packaging bags includes a cutting assembly for moving and sliding cutting, and a frame assembly for tilting and conveying the plastic packaging bags. A feeding assembly for rotating and blowing the plastic packaging bags is installed inside the frame assembly, and the cutting assembly is installed in the middle of the feeding assembly inside the frame assembly.

[0028] In this embodiment: the frame assembly includes a base 101, with two support legs 103 symmetrically fixed at one end of the base 101, and two electric push rods 102 symmetrically and rotatably mounted at the end of the base 101 away from the support legs 103. A housing mechanism is rotatably mounted between the electric push rods 102 and the support legs 103. The housing mechanism includes a housing body 104, with clearance grooves 105 symmetrically arranged on both sides of the end of the housing body 104 near the movable rotary roller 306. A limit groove 106 is provided above the clearance grooves 105, and a sliding groove is fixedly provided at the bottom of the housing body 104. 107; The chassis 104 is a rectangular box shape with both ends open; The base 101 first supports the extension of the electric push rod 102 to push the chassis 104 to rotate under the support of the support leg 103. The tilt angle is adjusted as needed. The plastic packaging bag enters from one end of the chassis 104 and slides down the bottom surface of the chassis 104. The limiting groove 106 is used to limit the movement direction of the limiting slider 305. The clearance groove 105 is used to avoid the second motor 307. The sliding cutting groove 107 ensures that the sliding cutting blade 205 passes through the bottom surface of the chassis 104 to ensure the thorough cutting of the plastic packaging bag.

[0029] In this embodiment: the cutting assembly includes a fixed frame 201, a linear guide rail 202 is mounted under the fixed frame 201, a linear motor 203 is mounted under the linear guide rail 202, and a sliding cutting mechanism is mounted under the linear motor 203; the sliding cutting mechanism includes a connecting seat 204, and a sliding cutting blade 205 is mounted under the connecting seat 204; the fixed frame 201 supports the linear guide rail 202, and the linear motor 203 drives the sliding cutting blade 205 to move along the linear guide rail 202 through the connecting seat 204, thereby slidingly cutting the plastic packaging bag;

[0030] In this embodiment: the feeding assembly includes a fixed rotary roller 301, with a first motor 302 at one end of the fixed rotary roller 301, an auxiliary mechanism for tilting forward and blowing air to convey plastic packaging bags on one side of the fixed rotary roller 301, and a lifting mechanism for vertical movement on the side of the auxiliary mechanism away from the fixed rotary roller 301. A movable rotary roller 306 is installed at the bottom of the lifting mechanism, and a second motor 307 is installed at one end of the movable rotary roller 306. The auxiliary mechanism includes an air supply pipe frame 308, which is inverted T-shaped, and a plurality of air outlets 309 are evenly installed on the bottom surface of the air supply pipe frame 308. The lifting mechanism includes a lifting frame 303, with a telescopic cylinder 304 installed on the top of the lifting frame 303, and two limit sliders 305 symmetrically installed at both ends of the lifting frame 303. 301 and the movable roller 306 are the same size. The first motor 302 and the second motor 307 are both servo motors. The first motor 302 drives the fixed roller 301 to rotate and push the plastic packaging bag down the bottom surface of the machine body 104. At the same time, compressed air enters from the air supply pipe frame 308 and is ejected from the air outlet 309 to assist in pushing the plastic packaging bag forward. Then, the telescopic cylinder 304 extends and pushes the lifting frame 303 to drive the movable roller 306 to move down, so that the movable roller 306 presses the plastic packaging bag tightly inside the machine body 104. The limiting slider 305 moves along the limiting slide groove 106 to limit the up and down movement direction. Then, the second motor 307 drives the movable roller 306 to rotate and push the plastic packaging bag, forming a pulling force with the fixed roller 301 to flatten the plastic packaging bag.

[0031] Working principle: The base 101 first supports the extension of the electric push rod 102, which pushes the housing 104 to rotate under the support of the support legs 103. The tilt angle is adjusted as needed. The plastic packaging bag enters from one end of the housing 104. The first motor 302 drives the fixed rotating roller 301 to rotate and push the plastic packaging bag down the bottom surface of the housing 104. At the same time, compressed air enters from the air supply pipe frame 308 and is sprayed out from the air outlet 309 to assist in pushing the plastic packaging bag forward. Then, the telescopic cylinder 304 extends and pushes the lifting frame 303 to drive the movable rotating roller 306 to move down, so that the movable rotating roller 306 presses the plastic packaging bag tightly inside the housing 104. The limiting slider 305 moves along the limiting slide groove 106 to limit the vertical movement. Then, the second motor 307 drives the movable roller 306 to rotate and push the plastic packaging bag, forming a pulling force with the fixed roller 301 to flatten the plastic packaging bag. When it reaches the set size, the fixed frame 201 supports the linear guide rail 202, and the linear motor 203 drives the sliding blade 205 to move along the linear guide rail 202 through the connecting seat 204 to slide and cut the plastic packaging bag. The sliding groove 107 ensures that the sliding blade 205 passes through the bottom surface of the machine box 104 to ensure the thorough cutting of the plastic packaging bag. After the cutting is completed, the second motor 307 continues to drive the movable roller 306 to rotate, pushing the plastic packaging bag out of the machine box 104. Then, the telescopic cylinder 304 retracts and drives the movable roller 306 to reset.

[0032] 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 apparatus for plastic packaging bags, comprising a cutting assembly for moving slidingly cut, characterized in that: It also includes a frame assembly for tilting and conveying plastic bags, wherein a feeding assembly for rotating and blowing the plastic bags is installed within the frame assembly, and the cutting assembly is installed in the middle of the feeding assembly within the frame assembly; The frame assembly includes a base (101), two support legs (103) are symmetrically fixed at one end of the base (101), and two electric push rods (102) are symmetrically rotatably mounted at the end of the base (101) away from the support legs (103). A housing mechanism is rotatably mounted between the electric push rods (102) and the support legs (103). The feeding assembly includes a fixed rotary roller (301), one end of which is equipped with a first motor (302). An auxiliary mechanism for tilting forward and blowing air to convey plastic packaging bags is provided on one side of the fixed rotary roller (301). A lifting mechanism for moving up and down is provided on the side of the auxiliary mechanism away from the fixed rotary roller (301). A movable rotary roller (306) is installed at the bottom of the lifting mechanism. A second motor (307) is provided at one end of the movable rotary roller (306).

2. A bag cutting apparatus for plastic packaging bags according to claim 1, characterized in that: The cutting assembly includes a fixed frame (201), a linear guide rail (202) is mounted under the fixed frame (201), a linear motor (203) is mounted under the linear guide rail (202), and a sliding cutting mechanism is mounted under the linear motor (203).

3. A bag cutting device for plastic bags as claimed in claim 2, wherein: The sliding cutting mechanism includes a connecting seat (204), and a sliding cutting blade (205) is mounted below the connecting seat (204).

4. The bag cutting apparatus of claim 1, wherein: The chassis mechanism includes a chassis body (104), and the chassis body (104) has symmetrical clearance grooves (105) on both sides near the end of the movable rotary roller (306). A limit slide groove (106) is provided above the clearance groove (105), and a sliding cutting groove (107) is fixedly provided at the bottom of the chassis body (104).

5. The bag-cutting device for plastic packaging bags according to claim 4, characterized in that: The chassis (104) is a rectangular box shape with both ends open.

6. The bag-cutting device for plastic packaging bags according to claim 1, characterized in that: The auxiliary mechanism includes an air supply pipe frame (308), which is inverted T-shaped, and a plurality of air outlets (309) are evenly installed on the bottom surface of the air supply pipe frame (308); the lifting mechanism includes a lifting frame (303), a telescopic cylinder (304) is installed on the top of the lifting frame (303), and two limit sliders (305) are symmetrically installed at both ends of the lifting frame (303).

7. The bag-cutting device for plastic packaging bags according to claim 6, characterized in that: The fixed rotating roller (301) and the movable rotating roller (306) are the same size, and the first motor (302) and the second motor (307) are both servo motors.

Images