A packaging web heat cutting device

Abstract

The utility model discloses a kind of packaging roll film hot cutting device, solve traditional sawtooth blade cold cutting and easily tear mouth fracture problem.Device includes hot cutting knife, its cutout portion both ends are equipped with arc connecting point;Local melting is made by heating, and after cooling, form tenacious fusion layer, improve cutout strength;Arc design disperses tearing stress, reduces fracture risk.Cutting and fusion function are combined, cutout is smooth without burr, and easily tear well.Suitable for cotton soft towel and other flexible roll film processing, improve product use reliability and production yield.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery technology, and in particular to a packaging roll film heat-cutting device. Background Technology

[0002] Cotton wipes are a common cleaning product in daily life and baby care, widely favored for their softness, skin-friendliness, and lint-free properties. For ease of use, commercially available cotton wipes are mostly packaged in roll film with pre-cut easy-tear openings, allowing users to quickly remove single or multiple wipes. Currently, the industry standard for processing easy-tear openings on roll film is a serrated cold-cutting process: a serrated blade cuts regularly arranged serrated notches on the surface of the roll film, reducing the localized strength of the material and achieving the easy-tear function.

[0003] However, the aforementioned traditional process has significant drawbacks: First, serrated blade cold cutting only cuts the material fibers through mechanical force, and the cut edge is prone to micro-cracks due to stress concentration. During subsequent storage or transportation, changes in environmental humidity or external pressure can cause these micro-cracks to expand, leading to overall tearing and making it difficult for users to tear the cotton towel completely along the preset path, thus affecting the user experience. Second, the roughness of the cut edge from cold cutting is relatively high, and some fibers are not completely cut, which may cause "fraying" during tearing, further increasing the risk of tearing. Third, for flexible materials like cotton towels, which are composed of cotton fibers and non-woven fabric, the cut strength of serrated blade cold cutting is difficult to match with the material itself. Users need to apply greater pulling force to tear it, which can easily lead to tear deviation or damage to the unused portion.

[0004] Although existing technologies attempt to improve tear performance by optimizing serration density, depth, or angle, the inherent nature of cold cutting limits the bonding strength between the cut and the material, and the breakage problem remains unresolved. Therefore, a novel easy-tear processing technology is urgently needed to enhance tear resistance while maintaining ease of tearing. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a packaging roll film heat cutting device.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model discloses a packaging roll film hot-cutting device, comprising a base plate, a feeding assembly, a hot-cutting assembly, a vision inspection assembly, and a discharging assembly, which are sequentially fixedly arranged on the base plate along the roll film conveying direction; the hot-cutting assembly includes a hot-cutting blade for cutting the roll film, a blade fixing mechanism for fixing the hot-cutting blade, a lifting mechanism for driving the blade fixing mechanism to move vertically reciprocating, and a mounting bracket for fixing and supporting the lifting mechanism; the mounting bracket is perpendicularly connected to the base plate, its top is fixedly connected to the top of the lifting mechanism, and its bottom is bolted to the base plate.

[0007] As a preferred embodiment of this utility model, the hot cutting blade is a rectangular metal plate structure with a protruding slit at the center of its bottom along the length direction; the cross-section of the slit is waist-shaped and smoothly transitions with the bottom surface of the hot cutting blade, which reduces cutting resistance and improves the flatness of the cut.

[0008] As a preferred embodiment of this utility model, the cutter fixing mechanism includes a cutter fixing seat fixedly connected to the output end of the lifting mechanism, a heating plate disposed at the bottom of the cutter fixing seat, and a heating rod embedded inside the heating plate; the bottom of the heating plate is rigidly connected to the upper surface of the hot cutter by bolts; a temperature sensor is provided on the side wall of the heating plate, and the signal output end of the temperature sensor is electrically connected to an external controller for real-time monitoring of the temperature of the heating plate and feedback adjustment of the heating power of the heating rod.

[0009] As a preferred embodiment of this utility model, the lifting mechanism includes a lifting drive motor fixedly mounted on the top of the mounting bracket, a coupling coaxially connected to the output shaft of the lifting drive motor, a turntable connected to the other end of the coupling, a hinge rod with one end eccentrically hinged to the edge of the turntable, a lifting rod hinged to the other end of the hinge rod, and a floating joint fixedly sleeved on the bottom end of the lifting rod; the bottom of the floating joint is fixedly connected to the top of the cutter fixing mechanism; four guide posts are symmetrically arranged around the lifting rod, the top ends of the guide posts are fixedly connected to the bottom of the mounting bracket, and the bottom ends pass through the top of the cutter fixing mechanism and are slidably connected to the cutter fixing mechanism; springs are sleeved around the guide posts, and the two ends of the springs abut against the top of the cutter fixing mechanism and the bottom of the mounting bracket, respectively, to buffer the impact vibration during cutting.

[0010] As a preferred embodiment of this utility model, the feeding assembly includes several sets of feeding drive rollers disposed at the input end of the base plate, a feeding drive motor for driving the feeding drive rollers to rotate, and a feeding adjustment mechanism fixedly installed at the inlet end of the mounting bracket; the feeding adjustment mechanism includes an upper adjustment roller and a lower fixed roller arranged in parallel, the two ends of the upper adjustment roller are connected to the side wall of the feeding adjustment mechanism through elastic adjustment members, and the elastic adjustment members are used to adjust the distance between the upper adjustment roller and the lower fixed roller; the feeding drive motor is synchronously connected to the feeding drive roller and the upper adjustment roller through a synchronous belt transmission mechanism, driving the film roll to move at a uniform speed along the conveying direction.

[0011] As a preferred embodiment of this utility model, the visual inspection component includes an adjustable bracket, an industrial camera fixedly mounted on the adjustable bracket, a backlight positioned directly below the industrial camera, and an image processor electrically connected to the industrial camera. The adjustable bracket is used to adjust the height, horizontal position, and shooting angle of the industrial camera. The backlight is used to enhance the contrast of the roll film cut. The image processor is configured to analyze the cut image acquired by the industrial camera, determine whether there are defects such as burrs or offsets, and feed the results back to the hot cutting component to adjust the cutting parameters.

[0012] As a preferred embodiment of this utility model, the adjustable bracket includes a vertical mounting column fixed to the base plate, a clamping block slidably sleeved on the vertical mounting column, a horizontal mounting column fixedly mounted on the clamping block, and an angle adjustment support disposed on the horizontal mounting column; the industrial camera is fixed to the bottom of the angle adjustment support by bolts; the clamping block and the vertical mounting column are slidably engaged to adjust the height of the industrial camera, the horizontal mounting column and the clamping block are slidably engaged to adjust the horizontal position, and the angle adjustment support is rotatably connected to the horizontal mounting column to adjust the shooting angle.

[0013] As a preferred embodiment of this utility model, the discharge assembly includes an upper discharge roller and a lower discharge roller arranged in parallel, and a discharge drive motor that drives the lower discharge roller to rotate; the upper discharge roller and the lower discharge roller are synchronously driven by a pair of meshing gears, and the discharge drive motor drives the lower discharge roller to rotate to transport the cut roll film product.

[0014] Compared with existing technologies, this utility model addresses the problem of easy tearing and breakage of cotton towel roll film by innovatively combining a heat-sealing cutting mode with the design of rounded connection points at both ends, achieving the following significant beneficial effects: 1. Improved tear resistance: A heat-sealing cutter replaces the traditional serrated blade for cold cutting. Heating causes localized melting of the film material, and upon cooling, the molecular chains at the cut re-crosslink, forming a welded layer with a certain degree of toughness. Compared to the brittle fracture surface formed by cold cutting, the heat-sealed cut has higher strength, effectively resisting stress concentration during tearing and preventing overall fracture caused by the propagation of microcracks. 2. Optimized stress distribution and reduced tearing difficulty: Rounded connection points are added to both ends of the heat-sealing cutter, replacing the original sharp serrated tips with smooth rounded transitions. During tearing, the force is evenly distributed along the rounded surface, avoiding concentration at the serrated tips and reducing local stress peaks. Users only need a small pulling force to tear along the preset path, reducing "snagging" or tear deviation. 3. Improve cut quality and enhance user experience: The heat sealing process simultaneously completes cutting and welding, resulting in a smooth and even cut without any burrs or outward-curving fibers left over from cold cutting. This prevents fingers from being scratched when tearing the product and also enhances its appearance and texture.

[0015] 4. Strong adaptability and compatibility with multiple material systems: The temperature of the heat-sealing cutter can be flexibly adjusted according to the material of the cotton towel roll film (such as cotton fiber, polyester non-woven fabric or composite film), ensuring that different materials can form an ideal weld cut, thus expanding the scope of application of this utility model. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is the front view of this utility model; Figure 3 This is a side view of the present invention; Figure 4 This is a top view of the present invention; Figure 5 This is a partially enlarged view of the cutter fixing mechanism in this utility model; In the diagram: 1. Base plate; 2. Feeding assembly; 3. Hot cutting assembly; 4. Vision inspection assembly; 5. Discharge assembly; 21. Feed drive roller; 22. Feed drive motor; 23. Feed adjustment mechanism; 31. Hot cutting blade; 32. Cutting blade fixing mechanism; 33. Lifting mechanism; 34. Mounting bracket; 41. Adjustable bracket; 42. Industrial camera; 43. Backlight; 44. Image processor; 51. Upper discharge roller; 52. Lower discharge roller; 53. Discharge drive motor; 231. Upper adjustment roller; 232. Lower fixed roller; 233. Elastic adjusting component; 311. Cutting section; 321. Cutter fixing seat; 322. Heating plate; 323. Heating rod; 324. Temperature sensor; 331. Lifting drive motor; 332. Coupling; 333. Turntable; 334. Hinge rod; 335. Lifting rod; 336. Floating joint; 337. Guide column; 338. Spring; 411. Vertical mounting column; 412. Clamping block; 413. Horizontal mounting column; 414. Angle adjusting support. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0018] In the attached diagram, all identical reference numerals refer to the same components.

[0019] Example 1 like Figure 1-5 As shown, this embodiment provides a heat-sealing and cutting device for processing cotton towel roll film. The device is arranged along the roll film conveying direction and includes a base plate 1, a feeding assembly 2, a heat-cutting assembly 3, a vision inspection assembly 4, and a discharge assembly 5.

[0020] Please see Figure 5 The hot-cutting component 3 is the core functional module, including a hot-cutting blade 31, a blade fixing mechanism 32, a lifting mechanism 33, and a mounting bracket 34. The hot-cutting blade 31 is a rectangular metal plate structure with a protruding cut at the center of the bottom along its length. The cut has a waist-shaped cross-section that smoothly transitions to the bottom surface. In particular, the two ends of the cut extend to form arc connection points, with the radius of the arc matching the thickness of the cotton soft towel roll film to disperse tearing stress. The blade fixing mechanism 32 includes a blade fixing seat 321, a heating plate 322, and heating rods 323. The blade fixing seat 321 is fixedly connected to the output end of the lifting mechanism 33, and the bottom is rigidly connected to the heating plate 322 by bolts. Multiple heating rods 323 are embedded inside the heating plate 322, and the bottom is attached to the upper surface of the hot-cutting blade 31. Temperature sensors are installed on the side walls to monitor the temperature in real time and feed it back to the controller to adjust the heating power and maintain a constant temperature for the hot-cutting blade 31. During the hot-cutting process, heating causes the roll film material to partially melt. After cooling, the molecular chains re-crosslink to form a weld layer, improving the toughness of the cut.

[0021] Please see Figure 2 The lifting mechanism 33 is mounted on the top of the mounting bracket 34. The output shaft of the lifting drive motor 331 is connected to the turntable 333 via a coupling 332. The edge of the turntable 333 is eccentrically hinged to a hinge rod 334, and the other end of the hinge rod 334 is hinged to a lifting rod 335. The bottom end of the lifting rod 335 is fixed to the top of the cutter fixing mechanism 32 via a floating joint 336. Four guide pillars 337 are symmetrically arranged around the periphery. The top end of the guide pillars 337 is fixed to the bottom of the mounting bracket 34, and the bottom end passes through the cutter fixing mechanism 32 and is slidably connected to it. Springs 338 are sleeved around the guide pillars 337, and their two ends abut against the top of the cutter fixing mechanism 32 and the bottom of the mounting bracket 34, respectively, to buffer the cutting impact. The mounting bracket 34 is vertically fixed to the base plate 1, providing stable support for the lifting mechanism 33.

[0022] Please see Figure 3 The feeding assembly 2 includes several sets of feeding drive rollers 21, a drive motor 22, and a feeding adjustment mechanism 23 at the input end of the base plate 1. The feeding drive rollers 21 and the upper adjustment rollers 231 rotate synchronously through a synchronous belt transmission mechanism; the two ends of the upper adjustment rollers 231 of the feeding adjustment mechanism 23 are connected to the side wall through elastic adjustment components such as springs or elastic rubber pads, and can float up and down to adjust the distance between them and the lower fixed rollers 232 to adapt to different thicknesses of film rolls and avoid slippage or breakage.

[0023] The adjustable bracket 41 of the vision inspection component 4 includes a vertical mounting column 411, a clamping block 412, a horizontal mounting column 413, and an angle adjustment support 414. The industrial camera 42 is fixed to the bottom of the angle adjustment support 414, and the backlight 43 is positioned directly below it. The clamping block 412 is slidably fitted onto the vertical mounting column 411 to adjust the height of the industrial camera 42. The horizontal mounting column 413 is slidably connected to the clamping block 412 to adjust the horizontal position. The angle adjustment support 414 rotates with the horizontal mounting column 413 to adjust the shooting angle. The image processor 44 analyzes the cut images captured by the industrial camera 42, identifies burrs and offset defects, and feeds this information back to the hot cutting component 3 to adjust the temperature or cutting speed.

[0024] The discharge assembly 5 includes an upper discharge roller 51 and a lower discharge roller 52 arranged in parallel, which are synchronously driven by a gear pair; the discharge drive motor 53 drives the lower discharge roller 52 to rotate and convey the cut roll film finished product.

[0025] Example 2 This embodiment is basically the same as the first embodiment in structure, except that: the arc connection point of the hot cutting blade 31 adopts a large radius arc shape to adapt to thicker cotton soft towel roll film; a heat-conducting copper sheet is added inside the heating plate 322 to improve heat conduction efficiency and ensure the temperature uniformity of the hot cutting blade 31; the elastic adjustment component of the feeding adjustment mechanism 23 is replaced with a pneumatic spring, and the pressure of the upper adjustment roller 231 is adjusted by air pressure to adapt to the tension control requirements in high-speed conveying scenarios.

[0026] Example 3 Please see Figure 4 This embodiment focuses on optimizing the adjustment flexibility of the vision inspection component 4: a scale is added to the vertical mounting column 411 of the adjustable bracket 41, which, together with the pointer on the clamping block 412, enables quantitative control of height adjustment; a ball screw is embedded inside the horizontal mounting column 413, which drives the clamping block 412 to move horizontally via a micro motor, improving the position adjustment accuracy; the angle adjustment support 414 adopts a ball joint structure, allowing the industrial camera 42 to tilt within a range of ±30 degrees, adapting to the needs of cutting and shooting at different angles. The temperature sensor of the hot cutting component 3 is replaced with an infrared thermometer, which monitors the surface temperature of the hot cutting blade 31 non-contactly, avoiding wear and interference from contact sensors.

[0027] In all the above embodiments, the core innovation lies in the design of the arc connection points at both ends of the hot cutting blade 31. Combined with the melting and cutting mechanism of the heat-sealing blade, it effectively solves the problem of easy tearing and breakage of the cotton soft towel roll film. The components are connected in a modular manner, and the parameters can be adjusted according to the roll film material and thickness, which has a wide range of applicability.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A packaging web film hot cutting apparatus characterized by, The assembly includes a base plate (1), a feeding assembly (2), a hot cutting assembly (3), a vision inspection assembly (4), and a discharge assembly (5) that are sequentially fixed on the base plate (1) along the film conveying direction. The hot cutting assembly (3) includes a hot cutting blade (31) for cutting the film, a cutting blade fixing mechanism (32) for fixing the hot cutting blade (31), a lifting mechanism (33) for driving the cutting blade fixing mechanism (32) to move vertically and reciprocally, and a mounting bracket (34) for fixing and supporting the lifting mechanism (33). The mounting bracket (34) is vertically connected to the base plate (1), its top is fixedly connected to the top of the lifting mechanism (33), and its bottom is bolted to the base plate (1).

2. A packaging web heat cutting apparatus according to claim 1, wherein The hot cutting blade (31) is a rectangular metal plate structure with a protruding cut (311) at the center of its bottom along the length direction. The cross-section of the cut (311) is waist-shaped and smoothly transitions with the bottom surface of the hot cutting blade (31), which is used to reduce cutting resistance and improve the flatness of the cut.

3. A packaging web heat cutting apparatus according to claim 1, wherein The cutter fixing mechanism (32) includes a cutter fixing seat (321) fixedly connected to the output end of the lifting mechanism (33), a heating plate (322) disposed at the bottom of the cutter fixing seat (321), and a heating rod (323) embedded inside the heating plate (322); the bottom of the heating plate (322) is rigidly connected to the upper surface of the hot cutter (31) by bolts; a temperature sensor (324) is provided on the side wall of the heating plate (322), and the signal output end of the temperature sensor (324) is electrically connected to an external controller for real-time monitoring of the temperature of the heating plate (322) and feedback adjustment of the heating power of the heating rod (323).

4. A packaging web heat cutting apparatus according to claim 1, wherein The lifting mechanism (33) includes a lifting drive motor (331) fixedly installed on the top of the mounting bracket (34), a coupling (332) coaxially connected to the output shaft of the lifting drive motor (331), a turntable (333) connected to the other end of the coupling (332), a hinge rod (334) with one end eccentrically hinged to the edge of the turntable (333), a lifting rod (335) hinged to the other end of the hinge rod (334), and a floating joint (336) fixedly sleeved on the bottom end of the lifting rod (335); the bottom of the floating joint (336) is connected to the top of the mounting bracket (34). The top of the cutter fixing mechanism (32) is fixedly connected; four guide columns (337) are symmetrically arranged around the lifting rod (335). The top of the guide column (337) is fixedly connected to the bottom of the mounting bracket (34), and the bottom end passes through the top of the cutter fixing mechanism (32) and is slidably connected to the cutter fixing mechanism (32); a spring (338) is sleeved around the guide column (337). The two ends of the spring (338) abut against the top of the cutter fixing mechanism (32) and the bottom of the mounting bracket (34) respectively, for buffering the impact vibration during cutting.

5. The packaging roll film heat-cutting device according to claim 1, characterized in that, The feeding assembly (2) includes several sets of feeding drive rollers (21) disposed at the input end of the base plate (1), a feeding drive motor (22) for driving the feeding drive rollers (21) to rotate, and a feeding adjustment mechanism (23) fixedly installed at the inlet end of the mounting bracket (34). The feeding adjustment mechanism (23) includes an upper adjustment roller (231) and a lower fixed roller (232) arranged in parallel. The two ends of the upper adjustment roller (231) are connected to the side wall of the feeding adjustment mechanism (23) through elastic adjustment members (233). The elastic adjustment members (233) are used to adjust the distance between the upper adjustment roller (231) and the lower fixed roller (232). The feeding drive motor (22) is synchronously connected to the feeding drive roller (21) and the upper adjustment roller (231) through a synchronous belt transmission mechanism, driving the film roll to move at a constant speed along the conveying direction.

6. A packaging web heat cutting apparatus according to claim 1, wherein The visual inspection component (4) includes an adjustable bracket (41), an industrial camera (42) fixedly mounted on the adjustable bracket (41), a backlight (43) located directly below the industrial camera (42), and an image processor (44) electrically connected to the industrial camera (42). The adjustable bracket (41) is used to adjust the height, horizontal position, and shooting angle of the industrial camera (42). The backlight (43) is used to enhance the contrast of the roll film cut. The image processor (44) is configured to analyze the cut image acquired by the industrial camera (42), determine whether there are defects such as burrs or offsets, and feed the results back to the hot cutting component (3) to adjust the cutting parameters.

7. The packaging web hot-cut apparatus of claim 6, wherein, The adjustable bracket (41) includes a vertical mounting column (411) fixed on the base plate (1), a clamping block (412) slidably sleeved on the vertical mounting column (411), a horizontal mounting column (413) fixedly mounted on the clamping block (412), and an angle adjustment support (414) set on the horizontal mounting column (413); the industrial camera (42) is fixed to the bottom of the angle adjustment support (414) by bolts; the clamping block (412) and the vertical mounting column (411) slide to adjust the height of the industrial camera (42), the horizontal mounting column (413) and the clamping block (412) slide to adjust the horizontal position, and the angle adjustment support (414) and the horizontal mounting column (413) are rotatably connected to adjust the shooting angle.

8. The packaging web thermal cutting apparatus according to claim 1, wherein The discharge assembly (5) includes an upper discharge roller (51) and a lower discharge roller (52) arranged in parallel, and a discharge drive motor (53) that drives the lower discharge roller (52) to rotate. The upper discharge roller (51) and the lower discharge roller (52) are synchronously driven by a pair of meshing gears. The discharge drive motor (53) drives the lower discharge roller (52) to rotate to transport the cut roll film product.

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