A PP film cutting mechanism

Abstract

This utility model discloses a PP film cutting mechanism, including a frame, a drive unit, a guide unit, a thermal cutting unit, and a control unit. Guide units are arranged on both sides of the frame, and a moving module is slidably mounted on each guide unit. The moving module is connected to the drive unit and can drive the thermal cutting unit to move up and down. The thermal cutting unit includes a heating wire and a tensioning assembly. The tensioning assembly keeps the heating wire taut through a tension spring. By replacing mechanical cutting with thermal cutting technology, and using the heating wire to instantly melt and cut the PP film, the problem of PP film not being able to be cut online is solved. This mechanism features a simple structure, reduced failure rate, and improved production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of PP film cutting technology and relates to a PP film cutting mechanism. Background Technology

[0002] Currently, most PP film cutting mechanisms use blade cutting. This method has advantages such as simple structure, convenient operation, and low cost, and is widely used in the industry. However, in actual production, blade cutting also has certain limitations. Over time, the blades gradually wear down and become dull. When the blades are not sharp enough, they may fail to cut the PP film, causing production interruptions and requiring manual intervention to adjust or replace the blades. This not only increases production costs and labor intensity but also seriously affects the production efficiency of automated lines, failing to meet the high-efficiency and stable requirements of modern large-scale production. Utility Model Content

[0003] The purpose of this invention is to provide a PP film cutting mechanism to solve the problem of PP film not being cut online, reduce the failure rate, and improve production efficiency.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] A PP film cutting mechanism includes a frame, a drive unit, a guide unit, a thermal cutting unit, and a control unit. Guide units are provided on both sides of the frame, and a moving module is slidably disposed on the guide unit. The moving module is connected to the drive unit and can drive the thermal cutting unit to move up and down. The thermal cutting unit includes a heating wire and a tensioning assembly. The tensioning assembly keeps the heating wire in a taut state through a tension spring.

[0006] As a further improvement of one embodiment of the present invention, the tensioning assembly includes an insulating terminal, a steel wire rope, a union bolt, and a guide wheel. The two ends of the heating wire are sequentially connected to the insulating terminal, the steel wire rope, the tension spring, and the union bolt. The guide wheel is pivotally mounted on the moving module, the union bolt is mounted on the moving module, and the steel wire rope is wound around the guide wheel.

[0007] As a further improvement of one embodiment of the present invention, the guide unit is a linear slide rail pair, the slider of the linear slide rail pair is fixed to the bottom surface of the moving module, and the guide rail of the linear slide rail pair is fixed to the frame.

[0008] As a further improvement of one embodiment of the present invention, the driving unit includes a cylinder seat fixedly mounted on the frame, a cylinder is mounted on the cylinder seat, and the piston rod of the cylinder is connected to the moving module to drive it to reciprocate along the guide rail direction.

[0009] As a further improvement of one embodiment of this utility model, the control unit is a heating controller, which is electrically connected to the heating wire and regulates the heating temperature of the heating wire.

[0010] As a further improvement of one embodiment of the present invention, the heating wire is arranged laterally above the PP film conveying path, and its movement trajectory is perpendicular to the film conveying direction.

[0011] As a further improvement of one embodiment of this utility model, a detection plate is pivotally mounted on the moving module. The detection plate has a detection plate hole for a steel wire rope to pass through. The steel wire rope is connected to a heating wire. A proximity switch is mounted at the lower end of the detection plate. When the heating wire breaks, the detection plate will shift at an angle. At this time, the proximity switch cannot detect the detection plate, and the system will sound an alarm to achieve the function of detecting whether the heating wire is broken.

[0012] As a further improvement of one embodiment of the present invention, the frame is composed of a base plate and side plates located on both sides of the base plate, and the drive unit and the guide unit are both disposed on the side plates.

[0013] The above technical solution has the following advantages: by replacing mechanical cutting with thermal cutting technology, the PP film is instantly melted by an electric heating wire, thus solving the problem of PP film not being able to be cut online. It has the advantages of simple structure, reduced failure rate, and improved production efficiency. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0016] Figure 1 This is a structural schematic diagram of the present invention.

[0017] Figure 2 This is a side view diagram provided for this utility model.

[0018] In the picture:

[0019] 1. Rack;

[0020] 2. Cylinder;

[0021] 3. Cylinder seat;

[0022] 4. Mobility module;

[0023] 5. Tension spring;

[0024] 6. Union bolts;

[0025] 7. Heating controller;

[0026] 8. Insulating terminals;

[0027] 9. Heating wire;

[0028] 10. Steel wire rope;

[0029] 11. Linear guide rail pair;

[0030] 12. Guide wheels;

[0031] 13. Detection plate. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0034] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model. Example

[0035] See Figures 1-2As shown, a PP film cutting mechanism includes a frame 1, a drive unit, a guide unit, a thermal cutting unit, and a control unit. Guide units are symmetrically distributed along the central axis M of the frame 1 on both sides. Moving modules 4 are slidably mounted on the guide units, connected to the drive unit, and capable of driving the thermal cutting unit to move up and down. The thermal cutting unit includes a heating wire 9 and a tensioning assembly. The tensioning assembly keeps the heating wire 9 taut via a tension spring 5. By replacing mechanical cutting with thermal cutting technology, the PP film is instantly melted and cut by the heating wire 9, solving the problem of PP film not being cut online.

[0036] Specifically, frame 1 serves as the main support for the entire device, providing a stable mounting base for other components. Frame 1 consists of a base plate and side plates located on both sides of the base plate, with the drive unit and guide unit both mounted on the side plates. To enhance the stability between the base plate and the side plates, reinforcing ribs can be added between them.

[0037] In this embodiment, the guide unit adopts a common and reliable mechanical structure called a linear slide rail pair 11. The linear slide rail pair 11 has advantages such as high precision and low friction, which can effectively ensure the motion accuracy of the moving module 4. Specifically, the slider of the linear slide rail pair 11 is firmly fixed to the bottom surface of the moving module 4 by fasteners such as bolts, ensuring that the two are tightly connected and move synchronously; while the guide rail of the linear slide rail pair 11 is fixed to the frame 1 in the same reliable way, providing a stable track for the movement of the slider and the moving module 4.

[0038] The drive unit includes a cylinder base 3 fixedly mounted on the frame 1. The cylinder base 3 can be made of metal and is securely installed on the frame 1 by welding or bolting. A cylinder 2 is mounted on the cylinder base 3, serving as the power source. Its piston rod is connected to the moving module 4 via a connector or thread. When the cylinder 2 operates, the piston rod extends and retracts, driving the moving module 4 to reciprocate along the guide rail of the linear slide rail pair 11, thereby moving the thermal cutting unit up and down. This drive method is simple in structure and responds quickly, meeting the requirements for rapid and accurate movement of the moving module 4 during PP film cutting, effectively ensuring the normal operation of the entire cutting mechanism.

[0039] In this embodiment, the tensioning assembly includes an insulating terminal 8, a steel wire rope 10, a union bolt 6, and a guide wheel 12. The heating wire 9 is sequentially connected to the insulating terminal 8, the steel wire rope 10, the tension spring 5, and the union bolt 6 at both ends. The guide wheel 12 is pivotally mounted on the moving module 4, and the union bolt 6 is mounted on the moving module 4. The steel wire rope 10 is wound around the guide wheel 12. The insulating terminal 8 serves a dual purpose: insulation and connection between the heating wire 9 and the steel wire rope 10. It can be made of a high-temperature resistant, insulating plastic material. The steel wire rope 10 has high strength and flexibility, effectively transmitting tension. The union bolt 6 allows for easy adjustment of the tension of the tension spring 5; its threaded portion is threadedly connected to the moving module 4, facilitating installation and disassembly. The guide wheel 12 is pivotally mounted on the moving module 4, allowing for flexible rotation and reducing friction during the movement of the steel wire rope 10. Its material can be a wear-resistant metal or engineering plastic.

[0040] In use, by adjusting the live bolt 6, the tension spring 5 generates tension, keeping the heating wire 9 taut at all times.

[0041] In this embodiment, the control unit adopts a heating controller 7, which is electrically connected to the heating wire 9. It can accurately control the heating temperature of the heating wire 9 to ensure that it melts the PP film at a suitable temperature.

[0042] In addition, a detection plate 13 is pivotally mounted on the moving module 4. The detection plate 13 has a vertical plate with detection holes for the steel wire rope 10 to pass through. Small limit blocks are used to block the sides of the vertical plate. The steel wire rope 10 is connected to the heating wire 9. A proximity switch is located at the lower end of the detection plate 13, which is electrically connected to the control system of the PP film cutting machine. When the heating wire breaks, the detection plate 13 will shift its angle. At this time, the proximity switch at the lower end of the detection plate 13 will no longer detect the detection plate, triggering an alarm, which provides good protection for the operation of the steel wire rope 10.

[0043] In actual use, the heating wire 9 is precisely positioned horizontally above the PP film conveying path, and its movement trajectory is strictly perpendicular to the conveying direction of the film. This arrangement ensures a stable and accurate cutting operation of the PP film. The heating wire 9 is heated by a heating controller 7 electrically connected to it. The heating controller 7 can precisely control the heating power, allowing the heating wire 9 to quickly heat up to the set temperature sufficient to melt the PP film.

[0044] During the heating process, the heating wire 9 will deform due to thermal expansion and contraction, specifically by becoming longer. At this time, the tension spring 5 fully utilizes its tensile capacity to continuously apply tension to the heating wire 9, keeping the heating wire 9 taut at all times, thereby maintaining the ideal cutting working state and ensuring the cutting quality.

[0045] The moving module 4 reciprocates under the extension and retraction of the piston rod of the cylinder 2. When it is necessary to cut the PP film, the cylinder 2 drives the moving module 4 to move downward, causing the heating wire 9 to contact the PP film and achieve instantaneous melting (cutting). After the cutting is completed, the cylinder 2 drives the moving module 4 to return to its original position. During this process, the tension spring 5 adjusts the tension of the heating wire 9 in real time to ensure that the heating wire 9 is always in the best working condition and ready for the next cutting.

[0046] The PP film cutting mechanism provided by this utility model is a component of the complete PP film cutting machine. It is closely integrated with other parts of the PP film cutting machine and shares the control system, power supply system, air supply system, etc. of the PP film cutting machine. Through a unified interface and operation instructions, it realizes the coordinated operation of each link and achieves automated production.

[0047] This invention abandons traditional mechanical cutting methods and adopts thermal cutting technology, utilizing a heating wire to instantly melt and cut the PP film. Mechanically, a simple and reliable combination of components such as linear guide rails and cylinders enables the moving module to precisely drive the heating wire. Compared to mechanical cutting, which is prone to problems like tool wear and jamming, this design is simple in structure, reducing the potential for failures caused by complex mechanical transmissions and significantly lowering the failure rate. Simultaneously, the instantaneous melting and cutting of the PP film by the heating wire results in high cutting speeds, eliminating the need for frequent tool replacements, ensuring continuous and stable operation, effectively improving production efficiency, and meeting the needs of large-scale production.

[0048] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0049] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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 PP film cutting mechanism, characterized in that, The device includes a frame (1), a drive unit, a guide unit, a heat cutting unit, and a control unit. Guide units are provided on both sides of the frame (1), and a moving module (4) is slidably provided on the guide unit. The moving module (4) is connected to the drive unit and can drive the heat cutting unit to move up and down. The heat cutting unit includes a heating wire (9) and a tensioning assembly. The tensioning assembly keeps the heating wire (9) in a taut state through a tension spring (5).

2. The PP film cutting mechanism according to claim 1, characterized in that, The tensioning assembly includes an insulating terminal (8), a steel wire rope (10), a union bolt (6), and a guide wheel (12). The two ends of the heating wire (9) are connected in sequence to the insulating terminal (8), the steel wire rope (10), the tension spring (5), and the union bolt (6). The guide wheel (12) is pivotally mounted on the moving module (4). The union bolt (6) is mounted on the moving module (4). The steel wire rope (10) is wound around the guide wheel (12).

3. The PP film cutting mechanism according to claim 1, characterized in that, The guiding unit is a linear slide rail pair (11), the slider of the linear slide rail pair (11) is fixed to the bottom surface of the moving module (4), and the guide rail of the linear slide rail pair (11) is fixed to the frame (1).

4. The PP film cutting mechanism according to claim 3, characterized in that, The drive unit includes a cylinder seat (3) fixedly mounted on the frame (1), and a cylinder (2) is mounted on the cylinder seat (3). The piston rod of the cylinder (2) is connected to the moving module (4) and drives it to reciprocate along the guide rail.

5. The PP film cutting mechanism according to claim 1, characterized in that, The control unit is a heating controller (7), which is electrically connected to the heating wire (9) and regulates the heating temperature of the heating wire (9).

6. The PP film cutting mechanism according to claim 1, characterized in that, The heating wire (9) is arranged horizontally above the PP film conveying path, and its movement trajectory is perpendicular to the film conveying direction.

7. The PP film cutting mechanism according to claim 2, characterized in that, The moving module (4) is pivotally equipped with a detection plate (13), which has a detection plate hole for the steel wire rope (10) to pass through. The steel wire rope (10) is connected to the heating wire (9). A proximity switch is provided at the lower end of the detection plate (13). When the heating wire breaks, the detection plate (13) will change angle. At this time, the proximity switch cannot detect the detection plate, and the system will alarm to achieve the function of detecting whether the heating wire is broken.

8. The PP film cutting mechanism according to claim 1, characterized in that, The frame (1) consists of a base plate and side plates located on both sides of the base plate, and the drive unit and guide unit are both located on the side plates.

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