Single column zipper bag four edge sealing automatic packaging machine

Abstract

The utility model discloses a four -edged seal automatic packaging machine of single row zip fastener bag belongs to packaging equipment technical field. In view of the low precision of existing zip fastener bag packaging machine packaging film slitting, easy to slip and run off, the problem of not being able to self -adaptation film body thickness and tension fluctuation, the utility model sets up the slitting device of self -adaptation adjustment on the rack, realizes packaging film stable feeding through motor drive traction roll cooperation spring self -adaptation compression roller, simultaneously adopts the slide seat of horizontal dampening positioning adjustment to carry the cylinder drive slitting knife, cooperates the slitting roller of ring -shaped cutting groove, realizes packaging film accurate burrless etc. Slitting is the upper film, lower film. The equipment is supported and sets up independent upper and lower film rectifying guide structure and zip fastener traction guide structure, guarantees film body, material, zip fastener accurate alignment superposition, and then through heat seal, flattening, seal, cut waste, tear, cutting process completes finished product processing. Improve the packaging precision and finished product qualification rate, and the equipment versatility and running stability are stronger.

Description

Technical Field

[0001] This utility model belongs to the field of packaging machinery and equipment technology, specifically relating to an automatic packaging machine for single-row zipper bags with four-side sealing, suitable for packaging food, daily necessities, and small hardware items. Background Technology

[0002] Single-row zipper bags, characterized by excellent sealing, reusability, and convenient storage, are currently the mainstream packaging medium in the light industry, food, and small commodities sectors. Correspondingly, four-side sealing automatic packaging machines are the core equipment for the large-scale production of zipper bags. Existing conventional single-row zipper bag four-side sealing packaging equipment is basically equipped with a basic structure for film unwinding, material conveying, zipper lamination, and heat sealing and cutting, enabling basic automated packaging operations. However, the core packaging film cutting and conveying structure has significant technical defects, restricting finished product quality and production efficiency.

[0003] Existing packaging film slitting equipment typically employs a fixed cutter paired with rigid pressure rollers. The cutter position and height are not adjustable, and the pressure rollers and traction rollers are rigidly bonded. In actual production, the packaging film itself has slight thickness tolerances, and tension fluctuations and conveyor vibrations easily occur during continuous transport. The fixed cutter cannot adaptively adjust, easily causing film slitting misalignment, burrs on the cut edges, and inconsistent widths of the upper and lower cut films. This directly leads to subsequent misalignment of the upper and lower film stacking, zipper misalignment, and misaligned heat sealing causing air leakage, significantly reducing the finished product yield of the packaging bags. Simultaneously, the rigid pressure rollers cannot adaptively buffer changes in film tension. Excessive tension can easily damage the film, while insufficient tension can cause slippage and conveyor jamming, further exacerbating slitting accuracy deviations.

[0004] In addition, existing equipment has a simple film and zipper guiding and correction structure with poor positioning accuracy, making it unsuitable for high-speed continuous production and prone to quality problems such as uneven bag sealing and weak zipper closure. In summary, existing single-row zipper bag packaging machines suffer from technical defects such as low cutting accuracy, poor adaptability, insufficient operational stability, and inconsistent finished product quality, making it difficult to meet the demands of high-precision, standardized, and high-volume production. Therefore, it is urgent to optimize and improve the core cutting and conveying guiding structure of the equipment. Utility Model Content

[0005] To address the aforementioned technical problems, the present invention aims to resolve the issues of poor film cutting accuracy, inability to adapt to film thickness and tension fluctuations, easy deviation of film and zipper conveying, low equipment operating stability, and substandard finished product packaging quality in existing single-row zipper bag four-side sealing packaging machines.

[0006] To achieve the above objectives, this utility model provides the following technical solution: To solve the above technical problems, the purpose of this utility model is to solve the technical problems of poor film cutting accuracy, inability to adapt to film thickness and tension fluctuations, easy deviation of film and zipper conveying, low equipment operation stability, and substandard finished product packaging quality of existing single-row zipper bag four-side sealing packaging machines.

[0007] To achieve the above objectives, this utility model provides the following technical solution: A single-row zipper bag four-side sealing automatic packaging machine, comprising a frame, on which a material feeding conveyor belt, a zipper self-sealing winding mechanism, and a packaging film winding mechanism are installed. Along the film conveying direction, the frame is sequentially arranged a zipper heat-sealing device, a longitudinal sealing device, a zipper strip flattening device, a transverse sealing device, a waste edge cutting device, an easy-tear opening device, a traction device, a roller cutting device, and a finished product conveying device. At the output end of the packaging film winding mechanism on the frame, a slitting device for equally dividing the entire packaging film into upper and lower films is assembled. The slitting device includes a base fixed to the frame, on which traction rollers and pressure rollers are correspondingly arranged vertically. The traction roller is connected to a drive motor that drives its rotation. The pressure roller adaptively presses against the surface of the traction roller through an elastic pressing structure. A slitting shaft is fixedly installed at the feeding end of the traction roller, and slitting rollers are coaxially fixedly mounted on the slitting shaft. The base... A guide rod is fixed horizontally at the top, and a sliding seat that can be positioned and locked is slidably sleeved on the guide rod. A vertically arranged cylinder is fixedly installed on the sliding seat, and a knife holder is fixedly connected to the bottom end of the piston rod of the cylinder. A slitting knife is detachably fixed on the knife holder. The slitting knife can move vertically under the drive of the cylinder and accurately fit with the slitting roller to complete the packaging film slitting operation. The frame is also equipped with an upper turning plate, an upper correction device, and an upper film output guide roller group for accurate upper film conveying, as well as a lower turning plate, a lower correction device, and a lower film horizontal steering roller for accurate lower film conveying. The frame is also equipped with a zipper traction device and a zipper guide roller group for traction and guiding the zipper belt. The output end of the material feeding conveyor belt is connected to the conveying path of the lower film horizontal steering roller. The zipper self-sealing roll mechanism is connected to the zipper guide roller group through the zipper traction device. After the slitting upper and lower films are conveyed and stacked by the corresponding guiding and correction structures, the material and zipper belt flow synchronously through each packaging processing device to complete the finished product packaging.

[0008] Furthermore, the elastic clamping structure includes a spring, the two ends of the pressure roller are rotatably mounted on a sliding support, the sliding support is vertically slidably assembled on the base body, and the spring is vertically assembled between the sliding support and the base body and continuously pushes the sliding support, so that the pressure roller adaptively clamps the traction roller.

[0009] Furthermore, a damping sliding structure is provided between the slide block and the guide rod, allowing the slide block to slide laterally along the guide rod to adjust the cutting position and to adaptively lock and position itself after sliding.

[0010] Furthermore, the slitting blade is a carbide tool with a blunted cutting edge, and the slitting roller has an annular groove in the middle that matches the cutting edge of the slitting blade.

[0011] Furthermore, the surfaces of the upper film output guide roller group, the lower film horizontal steering roller group, and the zipper guide roller group are all covered with an anti-slip and wear-resistant rubber layer.

[0012] This single-row zipper bag four-side sealing automatic packaging machine innovatively optimizes the design of the packaging film adaptive precision cutting system and high-precision guiding conveying system based on the existing four-side sealing packaging machine's general frame, material conveying, and packaging and cutting assembly.

[0013] The equipment is based on a frame and integrates a fully automated structure encompassing material feeding and conveying, zipper unwinding and traction, packaging film unwinding and slitting, film correction and guidance, stacking and sealing, shaping and cutting, and finished product conveying. The core improved slitting device relies on a stable slitting base built upon the frame. A motor-driven traction roller achieves uniform and active feeding of the packaging film. Combined with a spring-adaptive pressure roller structure, the pressure is automatically adjusted according to the film thickness and conveying tension, ensuring consistent film adhesion and preventing slippage, jamming, and damage.

[0014] Meanwhile, this utility model adopts an adjustable pneumatic slitting structure, which uses a guide rod and a damping slide to achieve stepless adjustment of the lateral position of the slitting blade, and can adapt to the slitting requirements of packaging films of different widths; the slitting blade is driven to rise and fall vertically by a cylinder, and forms a precise shearing pair with the annular groove on the surface of the slitting roller, which can adapt to the film thickness deviation, achieve burr-free and offset equal slitting, and ensure that the upper and lower films are completely uniform in size after slitting.

[0015] In addition, this invention features independently designed upper and lower film-specific steering, correction, and guide roller groups to position, correct, and smoothly convey the two film bodies after slitting. Combined with a dedicated zipper traction guide structure, it achieves precise alignment and placement of materials, film bodies, and zipper belts. The precisely stacked film assembly can then stably proceed to subsequent heat sealing, longitudinal sealing, flattening, transverse sealing, waste removal, tearing, and cutting processes. The entire process is seamlessly integrated, preventing quality defects such as misalignment and poor sealing from the outset.

[0016] This utility model overcomes the technical bottlenecks of low cutting accuracy, poor adaptability, and insufficient stability of traditional equipment through targeted optimization of the core structure. While retaining the advantages of fully automatic integrated operation of the original equipment, it significantly improves the processing accuracy and versatility of the equipment. Beneficial effects

[0017] Compared to existing technologies, this utility model has the following beneficial technical effects: First, this utility model uses a spring-adaptive pressure roller group to replace the traditional rigid pressure structure, which can adapt to the thickness tolerance of the packaging film and the fluctuation of the conveying tension, completely solving the problems of film slippage, jamming, and damage during film conveying, ensuring uniform and stable film conveying, and laying the foundation for precise slitting. Second, it uses a horizontally adjustable and vertically controllable pneumatic slitting knife in conjunction with a slotted slitting roller to achieve high-precision equal slitting of the packaging film, eliminating defects such as slitting deviation, burrs on the cut edges, and uneven film width, significantly improving the accuracy of upper and lower film stacking, and improving the packaging bag sealing quality from the source. Third, the independently configured film correction and guiding structure and zipper positioning conveying structure effectively prevent the film and zipper from deviating or misaligning during conveying, ensuring a firm zipper heat seal and a flat and neat sealing edge, significantly improving the sealing performance and appearance quality of the finished product. Fourth, the slitting position can be flexibly adjusted, and the equipment can be adapted to the processing of packaging films of various widths, making the equipment more versatile and adaptable, effectively reducing the equipment procurement and modification costs for enterprises. Fifth, the equipment has strong structural coordination, low failure rate, and high degree of automation, which can effectively improve the efficiency and finished product qualification rate of batch production of single-row zipper bags.

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the packaging film feeding process according to a specific embodiment of the present invention; Figure 2 This is an application structure diagram of a specific embodiment of the present utility model; Figure 3 This is a perspective view of the slitting and assembly process in a specific embodiment of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Material feeding conveyor belt; 3. Zipper self-sealing winding mechanism; 4. Packaging film winding mechanism; 5. Slitting device; 501. Base; 502. Traction roller; 503. Pressure roller; 505. Spring; 506. Slitting shaft; 507. Slitting roller; 508. Guide rod; 509. Slide; 510. Cylinder; 511. Knife holder; 512. Slitting knife; 6. Upper turning plate; 7. Upper guide plate. 8. Upper film output guide roller assembly; 9. Lower turning plate; 10. Lower correction device; 11. Lower film horizontal steering roller; 12. Zipper traction device; 13. Zipper guide roller assembly; 14. Zipper heat sealing device; 15. Longitudinal sealing device; 16. Zipper strip flattening device; 17. Horizontal sealing device; 18. Waste edge cutting device; 19. Easy-tear opening device; 20. Traction device; 21. Roller cutter cutting device; 22. Finished product conveying device. Detailed Implementation

[0021] The present invention will be described in detail below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0022] like Figure 1 — Figure 3 As shown in the figure, this embodiment discloses a single-row zipper bag four-side sealing automatic packaging machine. The main supporting structure is the frame 1, which serves as the mounting base for the entire machine and supports all functional components for feeding, cutting, conveying, processing, and discharging. From front to back, the upper part of the frame 1 is equipped with a material feeding conveyor belt 2, a zipper self-sealing winding mechanism 3, and a packaging film winding mechanism 4, which respectively realize the continuous conveying of materials to be packaged, the unwinding supply of the zipper belt, and the unwinding supply of the original packaging film, providing the material foundation for the automated operation of the entire machine.

[0023] A slitting device 5 is fixedly installed on the frame 1 at the output end of the packaging film roll mechanism 4. This device is used to precisely and equally cut the entire integrated packaging film into upper and lower films of uniform specifications. The fixed base of the slitting device 5 is a base body 501, which is fixedly assembled at a preset installation position on the frame 1. Inside the base body 501, a traction roller 502 and a pressure roller 503 are aligned vertically. The end of the traction roller 502 is externally connected to a drive motor, which provides constant power to achieve uniform rotation and actively pull the packaging film forward. The two ends of the pressure roller 503 are rotatably mounted on independent sliding supports. The sliding supports are vertically slidably assembled in the vertical grooves of the base body 501. The pressure roller 503 adaptively presses against the roller surface of the traction roller 502 through an elastic pressing structure. Specifically, a spring 505 is vertically installed between the sliding support and the bottom of the base body 501. The spring 505 is always in a compressed and pushing state, which drives the sliding support and the pressure roller 503 to adaptively press the roller surface of the traction roller 502 upward. During the packaging film conveying process, the spring 505 can adaptively extend and retract to adjust the clamping amount according to the film thickness and conveying tension, which can not only prevent the film from slipping and jamming, but also prevent excessive pressure from damaging the film, thus achieving flexible conveying.

[0024] A slitting shaft 506 is horizontally fixed at the feed end of the traction roller 502. The axis of the slitting shaft 506 is parallel to the conveying surface of the traction roller 502. A slitting roller 507 is coaxially fixed on the slitting shaft 506. An annular precision cutting groove is opened in the middle of the roller surface of the slitting roller 507 as the cutting reference of the slitting knife 512. A guide rod 508 is horizontally fixed on the top of the base 501. The axis of the guide rod 508 is perpendicular to the conveying direction of the packaging film. A lockable sliding seat 509 is slidably sleeved on the guide rod 508. Specifically, a damping sliding structure is set between the sliding seat 509 and the guide rod 508. The operator can slide the sliding seat 509 horizontally according to the width of the packaging film to accurately adjust the slitting position. After adjustment, it can be automatically locked and positioned by the damping force without the need for an additional fixing structure. The adjustment is convenient and the positioning is accurate.

[0025] A vertically arranged cylinder 510 is fixedly installed on the top surface of the slide block 509. The piston rod of the cylinder 510 is set downwards, and the bottom end of the piston rod is rigidly fixed to the blade holder 511. The blade holder 511 can be detachably installed with the slitting blade 512 by fastening bolts, which facilitates replacement and maintenance after the blade wears out. The slitting blade 512 is made of high-hardness cemented carbide, and the cutting edge is blunted to prevent tearing. During operation, the cylinder 510 drives the piston rod to extend downwards, causing the cutting edge of the slitting blade 512 to accurately engage with the annular cutting groove of the slitting roller 507, and stably shear the packaging film that is fed at a uniform speed, achieving burr-free and offset equal slitting operation.

[0026] The frame 1 is equipped with independent upper and lower film guiding and correcting conveying mechanisms for precise conveying and positioning of the two film bodies after slitting. The upper film conveying path sequentially includes an upper turning plate 6, an upper corrector 7, and an upper film output guide roller group 8. After slitting, the upper film is directionally changed by the upper turning plate 6, and the upper corrector 7 corrects conveying deviations, finally being smoothly and accurately output by the upper film output guide roller group 8. The lower film conveying path sequentially includes a lower turning plate 9, a lower corrector 10, and a lower film horizontal turning roller 11. After slitting, the lower film is horizontally conveyed after turning and correcting. The output end of the material feeding conveyor belt 2 precisely connects to the lower film horizontal conveying path, allowing the material to be packaged to fall accurately and evenly onto the upper surface of the lower film, completing automatic feeding.

[0027] On the frame 1, a zipper traction device 12 and a zipper guide roller group 13 are installed on the side of the lower film conveyor. The zipper tape output by the zipper self-sealing roll mechanism 3 is stretched and stabilized by the zipper traction device 12, and then precisely guided and positioned by the zipper guide roller group 13, so that the zipper tape is smoothly laid on the side of the lower film at the preset sealing position, ensuring that the zipper laying position is uniform and without deviation.

[0028] The output end of the upper film output guide roller group 8 is precisely aligned with the output end of the zipper guide roller group 13. When the lower film with the laid material and zipper belt is conveyed to the stacking station, the upper film precisely covers the lower film, material and the outside of the zipper belt, realizing precise stacking of the upper and lower films, providing a regular processing substrate for subsequent packaging operations.

[0029] Along the conveying direction after the film is stacked, the frame 1 is sequentially equipped with a zipper heat sealing device 14, a longitudinal sealing device 15, a zipper strip flattening device 16, a transverse sealing device 17, a waste edge cutting device 18, an easy-tear opening device 19, a traction device 20, a roller cutter 21, and a finished product conveying device 22. The stacked film assembly drives the material and zipper belt to flow synchronously through each packaging and processing device to complete the finished product packaging. The process sequentially completes the heat sealing of the zipper and film, the longitudinal sealing of both sides of the packaging bag, the flattening and shaping after the zipper heat sealing, the transverse sealing of the top and bottom of the bag, the cutting of excess waste edges, the stamping of the easy-tear opening, precise traction positioning, and fixed-length cutting and forming operations. Finally, the qualified zipper bag is conveyed out by the finished product conveying device 22, completing the fully automated packaging process.

[0030] In this embodiment, the outer surfaces of all rollers of the upper film output guide roller group 8, the lower film horizontal steering roller 11, and the zipper guide roller group 13 are covered with an anti-slip and wear-resistant rubber layer, which can effectively increase the friction between the roller body and the film body and the zipper belt, completely eliminate the slippage and deviation problems in the high-speed conveying process, and further improve the conveying accuracy and equipment operation stability.

[0031] The zipper heat sealing device 14, longitudinal sealing device 15, zipper strip flattening device 16, transverse sealing device 17, waste edge cutting device 18, easy-tear opening device 19, traction device 20, roller cutter cutting device 21, and finished product conveying device 22 involved in this utility model are all existing mature and standardized equipment structures. Their specific structures and working principles are common knowledge to those skilled in the art. This utility model does not make any improvements to the above-mentioned common structures, and will not be described in detail here.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A single-row zipper bag four-side sealing automatic packaging machine, comprising a frame (1), wherein a material feeding conveyor belt (2), a zipper self-sealing winding mechanism (3), and a packaging film winding mechanism (4) are installed on the frame (1), and a zipper heat sealing device (14), a longitudinal sealing device (15), a zipper strip flattening device (16), a transverse sealing device (17), a waste edge cutting device (18), an easy-tear opening device (19), a traction device (20), a roller cutter cutting device (21), and a finished product conveying device (22) are arranged sequentially along the film conveying direction on the frame (1), characterized in that: The frame (1) is equipped with a slitting device (5) at the output end of the packaging film roll mechanism (4) for equally dividing the entire packaging film into upper and lower films. The slitting device (5) includes a base (501) fixed to the frame (1). A traction roller (502) and a pressure roller (503) are arranged vertically on the base (501). The traction roller (502) is connected to a drive motor that drives its rotation. The pressure roller (503) is adaptively pressed against the traction roller through an elastic pressing structure. The roller (502) has a roller surface. A slitting shaft (506) is fixedly installed at the feed end of the traction roller (502). A slitting roller (507) is coaxially fixedly mounted on the slitting shaft (506). A guide rod (508) is horizontally fixed on the base (501). A sliding seat (509) that can be positioned and locked is slidably mounted on the guide rod (508). A vertically arranged cylinder (510) is fixedly installed on the sliding seat (509). A knife holder is fixedly connected to the bottom end of the piston rod of the cylinder (510). 511), a slitting blade (512) is detachably fixed on the blade holder (511). The slitting blade (512) can move vertically under the drive of the cylinder (510) and precisely fit with the slitting roller (507) to complete the packaging film slitting operation. The frame (1) is also equipped with an upper turning plate (6), an upper guide roller (7), an upper film output guide roller group (8) for precise upper film conveying, and a lower turning plate (9), a lower guide roller (10), and a lower film horizontal steering roller (11) for precise lower film conveying. The frame (1) is also equipped with a zipper traction device (12) and a zipper guide roller group (13) for traction and guiding the zipper belt. The output end of the material feeding conveyor belt (2) is connected to the conveying path of the lower film horizontal steering roller (11). The zipper self-sealing roll mechanism (3) is connected to the zipper guide roller group (13) through the zipper traction device (12). After the upper film and lower film are cut, they are conveyed and stacked by the corresponding guiding and correction structure, which drives the material and the zipper belt to flow synchronously through each packaging and processing device to complete the finished product packaging.

2. The automatic packaging machine for single-row zipper bags with four-side sealing according to claim 1, characterized in that: The elastic pressing structure includes a spring (505), the two ends of the pressure roller (503) are rotatably mounted on the sliding support, the sliding support is vertically slidably assembled on the seat (501), the spring (505) is vertically assembled between the sliding support and the seat (501) and continuously pushes the sliding support, so that the pressure roller (503) adaptively presses the traction roller (502).

3. The automatic packaging machine for single-row zipper bags with four-side sealing according to claim 1, characterized in that: A damping sliding structure is provided between the slide block (509) and the guide rod (508). The slide block (509) can slide laterally along the guide rod (508) to adjust the cutting position and can adaptively lock and position itself after sliding.

4. The automatic packaging machine for single-row zipper bags with four-side sealing according to claim 1, characterized in that: The slitting blade (512) is a cemented carbide tool with a blunted cutting edge, and the slitting roller (507) has an annular groove in the middle of its roller surface that matches the cutting edge of the slitting blade (512).

5. The automatic packaging machine for single-row zipper bags with four-side sealing according to claim 1, characterized in that: The surfaces of the upper film output guide roller group (8), the lower film horizontal steering roller (11), and the zipper guide roller group (13) are all covered with an anti-slip and wear-resistant rubber layer.

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