A cutting device for plastic woven bags

Abstract

This invention discloses a cutting device for plastic woven bags, comprising a frame, a drive mechanism, a conveying mechanism, and a cutting mechanism. The conveying mechanism includes a base, a conveying roller, and a pressing roller. The conveying roller includes a front roller and a rear roller. The base is fixedly mounted on the frame. The pressing roller, the front roller, and the rear roller are arranged sequentially above the base along the conveying direction of the plastic woven bag and are rotatably connected to the frame. The pressing roller, the front roller, and the rear roller are each driven to rotate by the drive mechanism mounted in the frame. The cutting mechanism is mounted on the frame between the front roller and the rear roller, and is located directly above the base. Using the cutting device of this invention, a thermal cutting method is employed, which not only provides a good cutting effect but also facilitates subsequent processes, effectively reduces processing costs, and avoids the emission of pungent odors during the cutting stage, achieving energy conservation and environmental protection. It has high processing efficiency, a simple overall structure, and is easy to operate, making it suitable for widespread application.

Description

Technical Field

[0001] This invention relates to the field of woven bag cutting equipment technology, and more specifically to a cutting device for plastic woven bags. Background Technology

[0002] Woven plastic bags, also known as snake-skin bags, are a type of plastic packaging product. Their raw materials are generally various chemical plastics such as polyethylene or polypropylene. Woven plastic bags have a wide range of uses, primarily for holding and packaging various items, and are widely used in industry. During the manufacturing process, woven plastic bags are cut to obtain suitable dimensions. The main production process involves using plastic raw materials, extruding them into film, cutting, unidirectionally stretching them into flat yarns, and finally weaving them through warp and weft, followed by cutting and sewing to obtain the final product. During the cutting process, directly cutting with a blade can cause the plastic strips at the cut to separate, potentially leading to the bag disintegrating. To prevent this, a thermal cutting device is used. Thermal cutting also effectively avoids burrs at the cut edges.

[0003] Existing hot cutting equipment mainly includes thermal cutting machines and laser cutting machines. If laser cutting machines are used, the equipment purchase cost is relatively high. Therefore, thermal cutting machines are more commonly used hot cutting equipment. However, if the temperature is not well controlled, not only will plastic adhere to the heating rollers, requiring frequent cleaning of the heating rollers, but also the plastic may scorch at high temperatures during hot cutting, emitting a pungent odor. This necessitates the addition of ventilation and other environmental protection equipment for purification.

[0004] A search revealed three patent documents: CN109732993A, CN109773892A, and CN116175654A. CN109732993A discloses an energy-saving and environmentally friendly plastic woven bag cutting machine; CN109773892A discloses an energy-saving and environmentally friendly plastic woven bag cutting machine; and CN116175654A discloses a plastic woven bag cutting device. These three patent documents offer different cutting methods for plastic woven bags. Given the wide range of applications in industry, agriculture, and food processing, the demand for plastic woven bags is constantly increasing. To meet market demand, reduce processing costs, avoid pungent odors during cutting, and facilitate heat cutting of plastic woven bags, a cutting device different from existing technologies is provided to meet these needs, which is of particular importance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the problems existing in the background art, thereby providing a cutting device with a simple structure and convenient operation. Using this cutting device, not only can the processing cost of enterprises be effectively reduced, but also the pungent odor emitted during the cutting stage can be avoided, thereby achieving the purpose of energy saving and environmental protection, so as to meet the processing and use needs of plastic woven bags. Specifically, it is a cutting device for plastic woven bags.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a cutting device for plastic woven bags, comprising a frame, a driving mechanism, a conveying mechanism, and a cutting mechanism. The conveying mechanism includes a base, a conveying roller, and a pressing roller. The conveying roller includes a front roller and a rear roller. The base is fixedly installed on the frame. There are pairs of pressing rollers, front rollers, and rear rollers, forming a roller-pair structure. The pressing rollers, front rollers, and rear rollers are arranged sequentially above the base along the conveying direction of the plastic woven bags and are rotatably connected to the frame. The pressing rollers, front rollers, and rear rollers are driven to rotate by the driving mechanism installed in the frame. The cutting mechanism is installed on the frame between the front rollers and the rear rollers and is located directly above the base. It is used to cut the plastic woven bags that have been conveyed by the pressing rollers and transported from the front rollers to the rear rollers.

[0007] Furthermore, the cutting device for plastic woven bags according to the present invention includes a support frame, a first telescopic member, a cutting blade, and an induction heater. The support frame is fixed on the frame between the front roller and the rear roller. The first telescopic member is fixedly connected to the support frame, and the movable end of the first telescopic member slides downward through the support frame. The cutting blade is installed on the movable end of the first telescopic member. The induction heater is disposed in the support frame and is used to provide induction heating power to the cutting blade.

[0008] Furthermore, in the cutting device for plastic woven bags described in this invention, the cutting blade includes a blade body, a heat-conducting part, and a cutting part. The blade body is a cuboid structure with a receiving cavity, and an opening communicating with the receiving cavity is provided at the bottom of the blade body. The heat-conducting part is disposed in the receiving cavity of the blade body, and a groove matching the cutting part is provided at the bottom of the heat-conducting part. The upper end of the cutting part passes through the opening at the bottom of the blade body and is connected to the heat-conducting part through the groove, while its lower end faces the base. A fixing bolt for fixing the cutting part is also disposed between the cutting part and the heat-conducting part. The cutting blade is fixed to the movable end of the first telescopic member through the blade body. The induction heater is used to provide a heat source to the heat-conducting part in the cutting blade and transfer it to the cutting part through the heat-conducting part.

[0009] Furthermore, in the cutting device for plastic woven bags described in this invention, the induction heater includes a heating power supply, a heating coil, and a wire. The heating power supply is disposed in a support frame, while the heating coil is disposed in a receiving cavity in the blade body and located outside the heat-conducting part. The heating coil is electrically connected to the heating power supply through the wire.

[0010] Furthermore, in the cutting device for plastic woven bags described in this invention, the heating coil is composed of two sets of rectangular sawtooth coils connected in series. The two sets of coils are arranged on both sides of the heat-conducting part along the length direction of the heat-conducting part. An insulating plate is provided at the wiring end of the heating coil. The wiring end of the heating coil is fixed to the heat-conducting part through the insulating plate. The wiring end of the heating coil is electrically connected to one end of a wire, and the other end of the wire passes through the blade body and is electrically connected to the output end of the heating power supply.

[0011] Furthermore, in the cutting device for plastic woven bags described in this invention, the heating power source is an IGBT induction heating power source.

[0012] Furthermore, in the cutting device for plastic woven bags described in this invention, the first telescopic component is any one of a pneumatic cylinder, an electric cylinder, an electric push rod, and a hydraulic cylinder.

[0013] Furthermore, the cutting device for plastic woven bags according to the present invention further includes a limiting mechanism, which includes a limiting member and a second telescopic member. The base is a hollow structure with a receiving cavity. An opening matching the limiting member is provided on the top surface of the base. The second telescopic member is installed in the receiving cavity of the base and is located directly below the opening. The limiting member is disposed in the receiving cavity of the base and is fixedly connected to the movable end of the second telescopic member. Under the action of the second telescopic member, the limiting member can pass upward through the opening and push against the cutting mechanism, or retract downward to return to its initial state.

[0014] Furthermore, the cutting device for plastic woven bags described in this invention further includes a cooling mechanism, which includes a cooler and an air duct. The cooler is installed in a receiving cavity in the base, and a plurality of ventilation holes communicating with the receiving cavity are provided at the bottom of the base. The air outlet of the cooler is connected to a limiting member through the air duct.

[0015] Furthermore, in the cutting device for plastic woven bags described in this invention, the limiting member is configured as a fan-shaped structure with an air guide channel, and its top surface is an arc surface structure while its bottom surface is a flat structure. Several air outlet micro-holes communicating with the air guide channel are provided on the top surface of the fan-shaped structure, and air inlet holes communicating with the air guide channel are provided on the side surface of the fan-shaped structure. One end of the air duct communicates with the limiting member through the air inlet hole, and the other end is connected to the air outlet of the air cooler. Under the action of the second telescopic member, the limiting member extends upward through the opening on the top surface of the base and pushes against the cutting mechanism, and can contact and fit with the cutting mechanism through the arc surface of its top surface. The second telescopic member is any one of a cylinder, an electric cylinder, an electric push rod, and a hydraulic cylinder.

[0016] Compared with the prior art, the cutting device for plastic woven bags described in this invention has the following advantages: The cutting blade is heated by an induction heater; the first telescopic member drives the cutting blade to move vertically up and down in the direction of conveying the plastic woven bag; the second telescopic member drives the limiting member to move up and down in the direction of the cutting blade; the arc surface of the top of the limiting member holds the plastic woven bag in place during conveying; the cutting part of the cutting blade performs thermal cutting on the plastic woven bag; after cutting, the cooling mechanism, under the action of a cold air fan, delivers cooling air through a duct to the air guide channel in the limiting member, and finally blows it onto the plastic woven bag above the limiting member through the air outlet micro-holes. This accelerates the detachment of the plastic woven bag from the limiting member and the cutting blade, effectively preventing the plastic from adhering to the cutting blade and avoiding the problem of the plastic burning at high temperatures.

[0017] Therefore, it can be seen that the cutting device described in this invention adopts a thermal cutting method, which has no burrs at the opening. It not only has a good cutting effect, but also benefits the operation of subsequent processes, effectively reduces the processing cost of enterprises, and avoids the emission of pungent odors during the cutting stage, thus achieving the purpose of energy conservation and environmental protection. It has high processing efficiency, which is conducive to large-scale production. Its overall structure is simple, easy to operate, and suitable for promotion and application. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 yes Figure 1 Enlarged schematic diagram of the local structure at point A;

[0021] Figure 3 yes Figure 1 Enlarged schematic diagram of the local structure at point B;

[0022] Figure 4 This is a schematic diagram of the installation structure of the heating coil described in this invention;

[0023] Figure 5 This is a schematic diagram of the structure of the cutting device in use according to the present invention. Figure 1 ;

[0024] Figure 6 This is a schematic diagram of the structure of the cutting device in use according to the present invention. Figure 2 .

[0025] The figure shows: 1-base, 2-pressing roller, 3-front roller, 4-rear roller, 5-support frame, 6-first telescopic component, 7-cutting blade, 71-blade body, 72-heat conducting part, 721-slot, 73-cutting part, 74-fixing bolt, 8-induction heater, 81-heating power supply, 82-heating coil, 83-wire, 84-insulating plate, 9-limiting component, 91-air outlet micro-hole, 10-second telescopic component, 11-air cooler, 12-air duct, 13-plastic woven bag. Detailed Implementation

[0026] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0027] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," and "right" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "provided with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] It should be noted that the term "comprising" or any other variation is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Example 1

[0030] like Figures 1 to 4 As shown, this embodiment provides a cutting device for plastic woven bags, including a frame, a drive mechanism, a conveying mechanism, and a cutting mechanism. The conveying mechanism includes a base 1, a conveying roller, and a pressing roller 2. The conveying roller includes a front roller 3 and a rear roller 4. The base 1 is fixedly installed on the frame. There are pairs of pressing rollers 2, front rollers 3, and rear rollers 4, forming a roller pair structure. The pressing rollers 2, front rollers 3, and rear rollers 4 are arranged sequentially above the base 1 along the conveying direction of the plastic woven bags and are rotatably connected to the frame. The pressing rollers 2, front rollers 3, and rear rollers 4 are driven to rotate by the drive mechanism installed in the frame. The cutting mechanism is installed on the frame between the front rollers 3 and rear rollers 4 and is located directly above the base 1. It is used to cut the plastic woven bags that have been conveyed by the pressing rollers 2 and transported between the front rollers 3 and rear rollers 4. The frame and drive mechanism are not shown in the figure. A control system for the drive mechanism is also provided, which uses an existing PLC controller. The drive mechanism includes drive motors that provide power to the pressing roller 2, front roller 3, and rear roller 4, and also includes pressing and adjusting devices. These devices are used to adjust the gap between two rollers of the pressing roller 2, front roller 3, and rear roller 4 to meet the cutting requirements of plastic woven bags of different thicknesses. During installation, the two rollers of the pressing roller 2, front roller 3, and rear roller 4 can be installed sequentially on the frame along the conveying direction of the plastic woven bags, taking into account the height of the base 1.

[0031] Furthermore, in the cutting device for plastic woven bags described in this embodiment, the cutting mechanism includes a support frame 5, a first telescopic member 6, a cutting blade 7, and an induction heater 8. The support frame 5 is fixed on the frame between the front roller 3 and the rear roller 4. The first telescopic member 6 is fixedly connected to the support frame 5, and the movable end of the first telescopic member 6 slides downward through the support frame 5. The cutting blade 7 is installed on the movable end of the first telescopic member 6. The induction heater 8 is disposed in the support frame 5 and is used to provide induction heating power to the cutting blade 7.

[0032] The cutting blade 7 includes a blade body 71, a heat-conducting part 72, and a cutting part 73. The blade body 71 is a cuboid structure with a receiving cavity, and an opening communicating with the receiving cavity is provided at the bottom of the blade body 71. The heat-conducting part 72 is disposed in the receiving cavity in the blade body 71, and a slot 721 matching the cutting part 73 is provided at the bottom of the heat-conducting part 72. The upper end of the cutting part 73 passes through the opening at the bottom of the blade body 71 and is connected to the heat-conducting part 72 through the slot 721, while its lower end faces the base. A fixing bolt 74 for fixing the cutting part 73 is also disposed between the cutting part 73 and the heat-conducting part 72. The cutting blade 7 is fixed to the movable end of the first telescopic member 6 through the blade body 71. The induction heater 8 is used to provide a heat source to the heat-conducting part 72 in the cutting blade 7 and transfer it to the cutting part 73 through the heat-conducting part 72.

[0033] The induction heater 8 includes a heating power supply 81, a heating coil 82, and a wire 83. The heating power supply 81 is disposed in the support frame 5, while the heating coil 82 is disposed in the receiving cavity of the blade body 71 and located outside the heat-conducting part 72. The heating coil 82 is electrically connected to the heating power supply 81 via the wire 83. The heating power supply 81 is an IGBT induction heating power supply. Since IGBT induction heating power supplies are commonly used induction heating devices in the prior art, they have the advantages of high-efficiency heating and precise control, and can adjust the operating frequency and current magnitude according to different heating requirements.

[0034] Furthermore, in the cutting device for plastic woven bags described in this embodiment, the first telescopic member 6 is any one of a cylinder, an electric cylinder, an electric push rod, and a hydraulic cylinder; and the heating coil 82 is composed of two sets of rectangular sawtooth coils connected in series. The two sets of coils are arranged on both sides of the heat-conducting part 72 along the length direction of the heat-conducting part 72. An insulating plate 84 is provided at the wiring end of the heating coil 82. The wiring end of the heating coil 82 is fixed to the heat-conducting part 72 through the insulating plate 84. The wiring end of the heating coil 82 is electrically connected to one end of the wire 83, and the other end of the wire 83 passes through the blade body part 71 and is electrically connected to the output end of the heating power supply 81. Example 2

[0035] This embodiment is based on Embodiment 1. In order to facilitate the cutting part 73 in the cutting mechanism to cut the conveyed plastic woven bag 13, the cutting device provided in this embodiment is adopted. The cutting device also includes a limiting mechanism, which includes a limiting member 9 and a second telescopic member 10. The base 1 is a hollow structure with a receiving cavity. An opening matching the limiting member 9 is provided on the top surface of the base 1. The second telescopic member 10 is installed in the receiving cavity in the base 1 and is located directly below the opening. The limiting member 9 is disposed in the receiving cavity in the base 1 and is fixedly connected to the movable end of the second telescopic member 10. Under the action of the second telescopic member 10, the limiting member 9 can pass upward through the opening and push against the cutting mechanism, or retract downward to return to the initial state. Example 3

[0036] This embodiment is based on embodiment 2. In order to facilitate the separation of the cut plastic woven bag 13, prevent the plastic from adhering to the cutting blade 7, and avoid the plastic from burning at high temperature, the cutting device provided in this embodiment is adopted. The cutting device also includes a cooling mechanism, which includes a cooler 11 and an air duct 12. The cooler 11 is installed in the receiving cavity in the base 1. Multiple ventilation holes communicating with the receiving cavity are opened at the bottom of the base 1. The air outlet of the cooler 11 is connected to the limiting member 9 through the air duct 12.

[0037] The limiting member 9 is configured as a fan-shaped structure with an air guide channel, and its top surface is an arc surface structure while its bottom surface is a flat structure. Several air outlet micro-holes 91 communicating with the air guide channel are provided on the top surface of the fan-shaped structure, and air inlet holes communicating with the air guide channel are provided on the side surface of the fan-shaped structure. One end of the air duct is connected to the limiting member 9 through the air inlet hole, and the other end is connected to the air outlet end of the air cooler 11. Under the action of the second telescopic member 10, the limiting member 9 passes upward through the opening on the top surface of the base 1 and pushes against the cutting mechanism, and can contact and fit with the cutting mechanism through the arc surface of its top surface. The second telescopic member 10 is any one of a cylinder, an electric cylinder, an electric push rod, and a hydraulic cylinder.

[0038] The cutting device for plastic woven bags described in this invention utilizes existing air sources to reduce processing costs. Both the first telescopic component 6 and the second telescopic component 10 can be cylinders. Simultaneously, an existing control system is needed to control the operating states of the drive mechanism, heating power supply 81, first telescopic component 6, second telescopic component 10, and cooling fan 11. Since the drive mechanism, heating power supply 81, first telescopic component 6, second telescopic component 10, and cooling fan 11 are commonly used devices in the prior art, this invention does not provide detailed descriptions; meeting the usage requirements is sufficient. The induction heater 8 works by using alternating current to generate an alternating magnetic field. This alternating magnetic field induces eddy currents within the metal conductor, rapidly heating the metal workpiece. The heating effect is determined by the frequency, current, and magnetic field. The heating temperature of the heat-conducting part 72 in the cutting blade 7 can be determined based on the actual cutting conditions, and then transferred from the heat-conducting part 72 to the cutting part 73. Finally, thermal cutting is achieved using the cutting part 73. Compared with existing infrared heating tubes, this method reduces energy consumption and significantly improves heating efficiency.

[0039] In practical applications, the cutting device described in this invention is used. The cutting blade 7 is heated by the induction heater 8. The first telescopic member 6 drives the cutting blade 7 to move vertically up and down in the direction of conveying the plastic woven bag 13. The second telescopic member 10 drives the limiting member 9 to move up and down in the direction of the cutting blade 7. The arc surface of the top of the limiting member 9 holds the plastic woven bag 13 in place during conveying. The cutting part 73 in the cutting blade 7 performs thermal cutting on the plastic woven bag 13. After cutting, the cooling mechanism, under the action of the cooler 11, cool air is drawn through... The air duct 12 delivers air into the air guide channel in the limiting member 9, and finally blows it onto the plastic woven bag 13 above the limiting member 9 through the outlet micro-holes 91. This accelerates the detachment of the plastic woven bag 13 from the limiting member 9 and the cutting blade 7, effectively preventing the plastic from adhering to the cutting blade 7 and avoiding the problem of the plastic burning at high temperatures. This also effectively removes plastic impurities adhering to the surface of the cutting part 73, making the surface of the cutting part 73 cleaner and more conducive to the reuse of the cutting part 73. It can also cool down the cut area of ​​the plastic woven bag 13, thereby improving the efficiency of hot cutting. In addition, since the cutting part 73 and the heat conduction part 72 in the cutting blade 7 are connected by fixing bolts 74 to form a detachable connection, it is also convenient to replace and repair the worn cutting part 73, thereby ensuring the cutting effect.

[0040] In summary, the cutting device described in this invention, which employs thermal cutting, produces burrs-free openings, resulting in excellent cutting performance and facilitating subsequent processes. This effectively reduces processing costs for enterprises and avoids the emission of pungent odors during the cutting stage, achieving energy conservation and environmental protection. Furthermore, its high processing efficiency is beneficial for large-scale production, and its simple overall structure and convenient operation make it suitable for widespread application.

[0041] Other aspects of this invention that are not detailed herein are all conventional techniques known to those skilled in the art.

[0042] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. The above description is only a preferred embodiment of this invention and does not limit this invention. Any minor modifications, equivalent substitutions and improvements made based on the technical solutions of this invention should be included within the scope of protection of the technical solutions of this invention.

Claims

1. A cutting device for plastic woven bags, comprising a frame, a drive mechanism, a conveying mechanism, and a cutting mechanism, characterized in that: The conveying mechanism includes a base (1), a conveying roller and a pressing roller (2). The conveying roller includes a front roller (3) and a rear roller (4). The base (1) is fixedly installed on the frame. There are a pair of pressing rollers (2), front rollers (3) and rear rollers (4) to form a roller pair structure. The pressing rollers (2), front rollers (3) and rear rollers (4) are arranged sequentially above the base (1) along the conveying direction of the plastic woven bags and are rotatably connected to the frame. The pressing rollers (2), front rollers (3) and rear rollers (4) are driven to rotate by a drive mechanism installed in the frame. The cutting mechanism is installed on the frame between the front rollers (3) and the rear rollers (4) and is located directly above the base (1). It is used to cut the plastic woven bags that are conveyed by the pressing rollers (2) and transported to the rear rollers (4) through the front rollers (3). The cutting mechanism includes a support frame (5), a first telescopic member (6), a cutting blade (7), and an induction heater (8). The support frame (5) is fixed on the frame between the front roller (3) and the rear roller (4). The first telescopic member (6) is fixedly connected to the support frame (5), and the movable end of the first telescopic member (6) slides downward through the support frame (5). The cutting blade (7) is installed on the movable end of the first telescopic member (6). The induction heater (8) is disposed in the support frame (5) and is used to provide induction heating power to the cutting blade (7). The cutting blade (7) includes a blade body (71), a heat-conducting part (72), and a cutting part (73). The blade body (71) is a cuboid structure with a receiving cavity, and an opening communicating with the receiving cavity is provided at the bottom of the blade body (71). The heat-conducting part (72) is disposed in the receiving cavity of the blade body (71), and a groove (721) matching the cutting part (73) is provided at the bottom of the heat-conducting part (72). The upper end of the cutting part (73) passes through the bottom of the blade body (71). The opening is connected to the heat-conducting part (72) through a slot (721), and its lower end faces the base. A fixing bolt (74) for fixing the cutting part (73) is also arranged between the cutting part (73) and the heat-conducting part (72). The cutting blade (7) is fixed to the movable end of the first telescopic member (6) through the blade body part (71). The induction heater (8) is used to provide a heat source to the heat-conducting part (72) in the cutting blade (7) and transfer it to the cutting part (73) through the heat-conducting part (72). The induction heater (8) includes a heating power supply (81), a heating coil (82), and a wire (83). The heating power supply (81) is located in the support frame (5), while the heating coil (82) is located in the receiving cavity of the blade body (71) and outside the heat-conducting part (72). The heating coil (82) is electrically connected to the heating power supply (81) through the wire (83). The heating coil (82) is composed of two sets of rectangular sawtooth coils connected in series. The two sets of coils are arranged on both sides of the heat-conducting part (72) along the length direction of the heat-conducting part (72). An insulating plate (84) is provided at the wiring end of the heating coil (82). The wiring end of the heating coil (82) is fixed to the heat-conducting part (72) through the insulating plate (84). The wiring end of the heating coil (82) is electrically connected to one end of the wire (83), and the other end of the wire (83) passes through the blade body (71) and is electrically connected to the output end of the heating power supply (81). The cutting device further includes a limiting mechanism, which includes a limiting member (9) and a second telescopic member (10). The base (1) is a hollow structure with a receiving cavity. An opening matching the limiting member (9) is provided on the top surface of the base (1). The second telescopic member (10) is installed in the receiving cavity of the base (1) and is located directly below the opening. The limiting member (9) is set in the receiving cavity of the base (1) and is fixedly connected to the movable end of the second telescopic member (10). Under the action of the second telescopic member (10), the limiting member (9) can pass upward through the opening and push against the cutting mechanism, or retract downward to return to the initial state.

2. The cutting device for plastic woven bags according to claim 1, characterized in that: The heating power supply (81) is an IGBT induction heating power supply.

3. The cutting device for plastic woven bags according to claim 1, characterized in that: The first telescopic component (6) can be any one of a pneumatic cylinder, an electric cylinder, an electric push rod, and a hydraulic cylinder.

4. The cutting device for plastic woven bags according to claim 1, characterized in that: The cutting device also includes a cooling mechanism, which includes a cooler (11) and an air duct (12). The cooler (11) is installed in the receiving cavity of the base (1). Multiple ventilation holes communicating with the receiving cavity are provided at the bottom of the base (1). The air outlet of the cooler (11) is connected to the limiting member (9) through the air duct (12).

5. A cutting device for plastic woven bags according to claim 4, characterized in that: The limiting member (9) is configured as a fan-shaped structure with an air guide channel, and its top surface is an arc surface structure while its bottom surface is a planar structure. Several air outlet micro-holes (91) communicating with the air guide channel are provided on the top surface of the fan-shaped structure, and air inlet holes communicating with the air guide channel are provided on the side of the fan-shaped structure. One end of the air duct is connected to the limiting member (9) through the air inlet hole, and the other end is connected to the air outlet end of the air cooler (11). Under the action of the second telescopic member (10), the limiting member (9) passes upward through the opening on the top surface of the base (1) and pushes against the cutting mechanism, and can contact and fit with the cutting mechanism through the arc surface of its top surface. The second telescopic member (10) is any one of a cylinder, an electric cylinder, an electric push rod, and a hydraulic cylinder.

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