Feeding and cutting mechanism for packaging film of packaging bag

Abstract

The utility model relates to a packaging film feeding and cutting mechanism of a packaging bag, which comprises a cutting assembly which is arranged on a packaging film conveying line and used for cutting the packaging film conveying line along the center line, the cutting assembly comprises a fixing block, a round rod which vertically extends upwards is fixedly arranged at the upper end of the fixing block, and the round rod sequentially penetrates through an upper roller frame and a cutting knife rest from bottom to top and is rotatably connected with the upper roller frame and the cutting knife rest. The other end of the cutter frame is provided with a cutter right opposite to the center line of a packaging film, a screw hole is formed in the cutter frame in a radial penetrating mode, a fastening screw is screwed into the abutting round rod to fix the cutter frame, the side portion of the fixing block is fixedly connected with an abutting block, and a spring which abuts against the upper roller frame towards the packaging film conveying line is connected between the abutting block and the upper roller frame in an abutting mode. The feeding and cutting mechanism for the packaging film of the packaging bag has the advantages that the feeding and cutting mechanism is simple in structure, the cutting edge part of the cutter is convenient to adjust, and the conveying of the packaging film is stable and efficient.

Description

Technical Field

[0001] The utility model relates to a packaging film feeding and cutting mechanism for a packaging bag. Background Art

[0002] When manufacturing a packaging bag, it is necessary to first cut a one-sided printed composite film along the middle position, and then bond and heat-seal the two-sided printed composite films obtained by cutting. However, in the prior art, the bonding of two-sided printed composite films mostly adopts manual operation, which is not only inconvenient and time-consuming, but also the bonding accuracy is not ideal, resulting in unqualified quality of the printed packaging bags produced. At present, there has been a disclosure [CN] Packaging film combining mechanism for packaging bags - CN214983627U to replace manual operation, which can automatically bond the cut composite films, not only improving the film combining efficiency, but also having high film combining accuracy. However, during the cutting process, the packaging film is prone to slack and wrinkles, and tearing occurs without passing through the cutting knife under the action of tension, resulting in offset of the cutting line. After long-term use and always cutting with the same cutting edge of the cutting knife, the cutting knife is prone to chipping, but it is inconvenient to replace the cutting knife, which will affect the cutting effect and further affect the conveying, combining and heat-sealing effects, and urgent improvement is needed. Summary of the Utility Model

[0003] In view of the deficiencies of the prior art, the technical problem to be solved by the utility model is to provide a packaging film feeding and cutting mechanism for a packaging bag, which is not only simple and reasonable in structure, but also stable and convenient in conveying.

[0004] To solve the above technical problem, the technical solution of the utility model is: a packaging film feeding and cutting mechanism for a packaging bag, including a cutting component that cuts the packaging film along the middle line on the packaging film conveying line. The cutting component includes a fixed block, and a round rod extending vertically upward is fixedly arranged at the upper end of the fixed block. The round rod sequentially penetrates through the upper roller frame and the cutting knife frame from bottom to top and is rotatably connected thereto. The other end of the cutting knife frame is provided with a cutting knife facing the middle line of the packaging film. A threaded hole is radially penetrated through the cutting knife frame, and the cutting knife frame is fixed by screwing a fastening screw into the round rod. A top block is fixedly connected to the side of the fixed block, and a spring that presses the upper roller frame toward the packaging film conveying line is provided between the top block and the upper roller frame. A top wheel is rotatably connected to the inner end of the upper roller frame.

[0005] Further, a pressing plate is arranged at the upper end of the cutting knife frame. The cutting knife is clamped between the pressing plate and the cutting knife frame and is fixed by sequentially passing a hand-tightening screw through the pressing plate, the cutting knife and screwing it into the cutting knife frame from top to bottom.

[0006] Further, a lower round rod coaxially arranged with the round rod is fixedly arranged on the upper end surface of the fixed block, and a lower roller frame parallel to the upper roller frame is rotatably connected through the lower round rod. The top wheel is located between the upper roller frame and the lower roller frame and is rotatably connected to the upper roller frame and the lower roller frame through a central rotating shaft.

[0007] Further, a top plate is fixedly provided on one side of the upper roller frame close to the top block, and the spring is abutted between the top block and the top plate, and both ends of the spring are fixedly connected to the top block and the top plate respectively.

[0008] Further, the packaging film conveying line includes a feeding roller, a tensioning roller, a transition roller, two obliquely arranged guiding rollers, and a conveying roller for conveying to the film combining station. The cutting assembly is located between the transition roller and the two guiding rollers. The whole packaging film is sequentially wound around the feeding roller, the tensioning roller, and the transition roller, and is cut into two sub-packaging films by the cutting assembly. The two sub-packaging films are respectively wound around the two guiding rollers and then wound around the conveying roller and enter the film combining station to be combined.

[0009] Further, the two guiding rollers extend obliquely upward or downward in an inverted V shape to guide the whole packaging film conveyed horizontally and the cut sub-packaging films to extend vertically and away from each other, and then respectively bypass the conveying roller and enter the film combining station.

[0010] Compared with the prior art, the present utility model has the following beneficial effects: The packaging film feeding and cutting mechanism of the packaging bag has a simple structure, the cutting edge of the cutting knife is convenient to adjust, and the packaging film is conveyed stably and efficiently. Through the setting of the spring and the top wheel, it can effectively avoid the occurrence of packaging film slack and wrinkles, and the situation that the cutting line deviates due to tearing without passing through the cutting knife under the action of tension.

[0011] The following further describes the present utility model in detail with reference to the drawings and specific embodiments. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0013] Figure 2 is an enlarged schematic diagram of the cutting assembly in an embodiment of the present utility model;

[0014] Figure 3 is a side view of the cutting assembly in an embodiment of the present utility model;

[0015] Figure 4 is a conveying schematic diagram of the packaging film conveying line in an embodiment of the present utility model.

[0016] In the figure: 1 - packaging film conveying line, 2 - cutting assembly, 3 - fixed block, 4 - round rod, 5 - upper roller frame, 6 - cutter holder, 7 - cutting knife, 8 - screw hole, 9 - fastening screw, 10 - top block, 11 - spring, 12 - top wheel, 13 - pressing plate, 14 - hand-tightening screw, 15 - lower round rod, 16 - lower roller frame, 17 - rotating shaft, 18 - top plate, 19 - feeding roller, 20 - tensioning roller, 21 - transition roller, 22 - guiding roller, 23 - conveying roller, 24 - whole packaging film, 25 - sub-packaging film. Detailed Embodiments

[0017] To make the above features and advantages of the present utility model more obvious and understandable, specific embodiments are given below and described in detail in conjunction with the accompanying drawings as follows.

[0018] As Figures 1 to 4 shown, the packaging film feeding and cutting mechanism of the packaging bag includes a cutting component 2 that divides it along the center line on the packaging film conveying line 1. The cutting component includes a fixed block 3. A round rod 4 extending vertically upward is fixedly provided at the upper end of the fixed block. The round rod sequentially penetrates through the upper roller frame 5 and the cutter holder 6 from bottom to top and is rotatably connected to the upper roller frame and the cutter holder. The other end of the cutter holder is provided with a cutter 7 facing the center line of the packaging film. A screw hole 8 is radially penetrated through the cutter holder, and a fixing screw 9 is screwed in to abut against the round rod to fix the cutter holder. A top block 10 parallel to the upper roller frame is fixedly connected to the side of the fixed block. A spring 11 that presses the upper roller frame toward the packaging film conveying line is abutted between the top block and the upper roller frame. The inner end of the upper roller frame is rotatably connected with a top wheel 12, and the top wheel abuts the packaging film against the transition roller and rotates synchronously along the conveying direction.

[0019] In the embodiment of the present utility model, a pressing plate 13 is provided at the upper end of the cutter holder. The cutter is clamped between the pressing plate and the cutter holder and is sequentially screwed through the pressing plate, the cutter and screwed into the cutter holder by a hand-tightening screw 14 to be fixed. A screw hole for cooperating with the hand-tightening screw is opened at the top of the cutter holder.

[0020] In the embodiment of the present utility model, a lower round rod 15 coaxially arranged with the round rod is fixedly provided on the upper end surface of the fixed block, and a lower roller frame 16 parallel to the upper roller frame is rotatably connected through the lower round rod. One end of the lower roller frame is sleeved outside the lower round rod and rotatably connected thereto. The top wheel is located between the upper roller frame and the lower roller frame and is rotatably connected to the upper roller frame and the lower roller frame through a central rotating shaft 17.

[0021] In the embodiment of the present utility model, a top plate 18 is fixedly provided on the side of the upper roller frame close to the top block. The spring is abutted between the top block and the top plate, and both ends of the spring are respectively fixedly connected to the top block and the top plate.

[0022] In the embodiment of the present utility model, the packaging film conveying line includes a feeding roller 19, a tensioning roller 20, a transition roller 21, two obliquely arranged guiding rollers 22, and two conveying rollers 23 for converging and conveying to the film combining station. The cutting component is located between the transition roller and the two guiding rollers. The whole packaging film is sequentially wound around the feeding roller, the tensioning roller, the transition roller and is divided into two packaging film sub-films by the cutting component. The two packaging film sub-films are respectively wound around the two guiding rollers and then wound around the conveying rollers and enter the film combining station to converge and combine the films. The tensioning principle of the tensioning roller is a general setting and has been disclosed in [CN] Packaging film combining mechanism of packaging bag - CN214983627U, and will not be elaborated here too much.

[0023] In the embodiment of the present utility model, the two guiding rollers extend obliquely upward or obliquely downward in an inverted V shape to guide the sub-film 25 of the packaging film after cutting the whole packaging film 24 conveyed horizontally to extend vertically in opposite directions, and then respectively bypass the conveying rollers to enter the film combining station.

[0024] The working principle of the embodiment of the present utility model: First, the whole packaging film is horizontally conveyed through the feeding roller, the tensioning roller and the transition roller.

[0025] The present utility model is not limited to the above best embodiment, and anyone can obtain the packaging film feeding and cutting mechanism of various forms of packaging bags under the inspiration of the present utility model. All equal changes and modifications made according to the scope of the patent application of the present utility model shall fall within the scope covered by the present utility model.

Claims

1. The packaging film feeding and cutting mechanism of the packaging bag is characterized by: The invention comprises a cutting assembly for cutting the packaging film along the center line on the packaging film conveyor line, the cutting assembly comprises a fixed block, a round rod extending vertically is fixedly provided on the upper end of the fixed block, the round rod penetrates the upper roller frame and the cutting knife frame from bottom to top in sequence and is rotatably connected thereto, a cutting knife facing the center line of the packaging film is installed on the other end of the cutting knife frame, a screw hole is radially penetrated on the cutting knife frame, and the round rod is screwed into the top connection through a fixing screw to fix the cutting knife frame, a top block is fixedly connected to the side of the fixed block, a spring is top-connected between the top block and the upper roller frame to press the upper roller frame toward the packaging mold conveyor line, and a top wheel is rotatably connected to the inner end of the upper roller frame.

2. The packaging film feeding and cutting mechanism for packaging bags according to claim 1, characterized in that: A pressing plate is arranged at the upper end of the cutting knife frame, and the cutting knife clamp is arranged between the pressing plate and the cutting knife frame and is screwed into the cutting knife frame and fastened by hand screws that pass through the pressing plate and the cutting knife in sequence from top to bottom.

3. The packaging film feeding and cutting mechanism for packaging bags according to claim 1, characterized in that: The upper end surface of the fixed block is fixed with a lower round rod coaxially arranged with the round rod, and is rotatably connected to a lower roller frame parallel to the upper roller frame via the lower round rod; the top wheel is located between the upper roller frame and the lower roller frame and is rotatably connected to the upper roller frame and the lower roller frame via a central rotating shaft.

4. The packaging film feeding and cutting mechanism for packaging bags according to claim 1, characterized in that: A top plate is fixedly arranged on one side of the upper roller frame close to the top block, the spring is connected between the top block and the top plate, and two ends of the spring are respectively fixedly connected to the top block and the top plate.

5. The packaging film feeding and cutting mechanism for packaging bags according to claim 1, characterized in that: The packaging film conveyor line includes a feed roller, a tensioning roller, a transition roller, two obliquely arranged guide rollers and a conveying roller for conveying to a film-closing station. The cutting assembly is located between the transition roller and the two guide rollers. The packaging film is sequentially wound around the feed roller, the tensioning roller and the transition roller and is cut into two packaging film sub-films by the cutting assembly. The two packaging film sub-films are respectively wound around the two guide rollers and then around the conveying roller to enter the film-closing station to meet and combine the films.

6. The packaging film feeding and cutting mechanism for packaging bags according to claim 5, characterized in that: The two guide rollers extend obliquely upward or downward in an inverted eight-shaped shape to guide the cut sub-films of the horizontally conveyed packaging film to extend vertically opposite to each other, and then bypass the conveying rollers and enter the film-closing station respectively.

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