Thermal cutting device for plastic bag production

Abstract

The invention relates to the technical field of plastic bag production, in particular to a thermal cutting device for plastic bag production, which comprises a base, a support guide column is fixedly mounted on the top end surface of the base, a cutting seat is jointly slidably sleeved on the outer wall of the support guide column, and anti-sticking tightening components are arranged at the bottom ends of the front and rear end surfaces of the cutting seat; the anti-sticking tightening assembly comprises a fixing base fixedly installed at the bottom ends of the front end face and the rear end face of the cutting base, a shaft sleeve is rotationally installed in the fixing base, a connecting rod is fixedly installed on the bottom end face of the shaft sleeve, a bearing shaft is rotationally installed between the inner bottom ends of the connecting rod, and a shifting wheel is rotationally installed on the outer end face of the bearing shaft. By tightening the plastic bag, the contact area and pressure between the electric heating cutting knife and the plastic bag can be reduced, and the adhesion risk is reduced, so that the situation that the cut plastic bags are adhered together or adhered to the electric heating cutting knife is avoided, and the stability of the hot cutting knife in the cutting process is favorably kept through synchronous movement of the anti-adhesion tightening assembly.

Description

Technical Field

[0001] The invention relates to the technical field of plastic bag production, in particular to a thermal cutting device used for plastic bag production. Background Art

[0002] Thermal cutting is an important process in plastic bag production, which involves cutting plastic film into a predetermined shape and size. Thermal cutting is a processing method that uses heat energy to cut materials. In plastic bag production, thermal cutting is mainly achieved by a thermal cutting mechanism, which heats the blade to soften and separate the plastic film after heating, thereby achieving the purpose of cutting.

[0003] The thermal cutting device used in the production of plastic bags usually consists of a heating system, a cutting blade, a control system, etc. Heating system: used to heat the cutting blade to the temperature required for cutting. The heating system usually uses heating elements such as electric heating wires and heating plates. The cutting blade is customized according to the required shape and size of the plastic bag and is used to contact and cut the plastic film. The material of the cutting blade or mold usually has high hardness and heat resistance. The control system is used to control the heating temperature, cutting speed and other parameters of the heating system to ensure cutting quality and efficiency. The control system usually uses control elements such as PLC (Programmable Logic Controller) or single-chip microcomputer.

[0004] Due to the characteristics of plastic bag materials, they are easy to soften and melt at high temperatures, so during the cutting process, plastic bags may adhere to the hot cutter. In order to solve the problem of knife sticking, the existing technical solution is to regularly replace the hot cutter through the detachable installation of the hot cutter body and the knife holder, so as to facilitate the cleaning and maintenance of the blade surface to reduce the occurrence of adhesion; however, when the adhesive adheres to the hot cutter, the adhesive may cause the cutting edge to be uneven, increase burrs, and even incomplete cutting, thereby reducing the overall quality of the plastic bag. Summary of the invention

[0005] The purpose of the present invention is to provide a thermal cutting device for plastic bag production, which can reduce the contact area and pressure between the electric thermal cutting knife and the plastic bag by tightening the plastic bag, reduce the risk of adhesion, and avoid the cut plastic bags from sticking together or adhering to the electric thermal cutting knife, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A thermal cutting device for plastic bag production, comprising a base, a thermal cutting groove is provided in the middle of the top surface of the base, a support guide column is fixedly installed on the top surface of the base, a cutting seat is slidably sleeved on the outer walls of a plurality of the support guide columns, and an anti-sticking tightening component is provided at the bottom ends of the front and rear end surfaces of the cutting seat;

[0007] The anti-sticking tensioning assembly includes a fixed seat fixedly installed at the bottom end of the front and rear end surfaces of the cutting seat, a shaft sleeve is rotatably installed inside the fixed seat, a connecting rod is fixedly installed on the bottom end surface of the shaft sleeve, a bearing shaft is rotatably installed between the inner bottom ends of two adjacent left and right connecting rods, the interior of the bearing shaft is a hollow structure, a thumb wheel is rotatably installed on the outer end surface of the bearing shaft, and a plurality of thumb wheels are provided, a second spring is fixedly installed on the front and rear end surfaces of the cutting seat below the fixed seat, and the second spring is fixedly connected to the connecting rod at one end away from the cutting seat.

[0008] Preferably, a conductive ring is embedded on the circumferential surface of the thumbwheel, and an electrically conductive wire is fixedly connected to the end face of the conductive ring located inside the thumbwheel. The electrically conductive wire runs through the interior of multiple thumbwheels, and the end faces of the thumbwheels on the left and right sides that face away from each other are concave arc structures, and there are three thumbwheels with concave arc structures on the left and right side end faces.

[0009] Preferably, a supporting top plate is fixedly mounted on the top ends of the plurality of supporting guide columns, a hydraulic cylinder is fixedly mounted at the middle position of the top end surface of the supporting top plate, and a telescopic end of the hydraulic cylinder passes through and is fixedly connected between the supporting top plate and the cutting seat.

[0010] Preferably, a cutting assembly is provided on the inside and outside of the cutting seat, and the cutting assembly includes a servo motor fixedly mounted on the outer wall of the left end of the cutting seat, and the output end of the servo motor is fixedly connected to a drive shaft located inside the cutting seat, and the drive shaft is rotationally connected to the cutting seat, and the interior of the drive shaft is a hollow structure.

[0011] Preferably, cutting assembly seats are fixedly installed on both ends of the left and right ends of the outer wall of the driving shaft, and an electric thermal cutting knife is detachably installed between two adjacent cutting assembly seats on both sides. An assembly slot is provided at the connection between the electric thermal cutting knife and the cutting assembly seat, and a conductive contact is movably installed inside the assembly slot on the side away from the electric thermal cutting knife.

[0012] Preferably, a wire and a first spring are movably installed inside the assembly slot, one end of the wire and the first spring are fixedly connected to the electric thermal cutting knife, the other end of the wire and the first spring are fixedly connected to the conductive contact, a conductive seat is fixedly installed at the bottom end of the cutting seat corresponding to the conductive contact, and a cleaning brush is fixedly installed at the inner top end of the cutting seat corresponding to the electric thermal cutting knife.

[0013] Preferably, a cleaning collection assembly is commonly installed inside and outside the cutting seat, and the cleaning collection assembly includes a cleaning guide groove fixedly installed in the middle position of the outer wall of the driving shaft, and cleaning adsorption guide holes are provided inside the cleaning guide groove and the driving shaft, and a partition plate parallel to the cleaning guide groove is fixedly installed in the middle position of the interior of the driving shaft.

[0014] Preferably, the inner right end of the driving shaft is rotatably connected to a connecting head, an adsorption duct is passed through the interior of the connecting head, a collecting filter box and an adsorption pump that are connected to each other are fixedly installed on the outer wall of the right end of the cutting seat, the collecting filter box is located below the adsorption pump, and the output end of the adsorption pump is fixedly connected to an air intake pipe, and the end of the air intake pipe away from the adsorption pump is rotatably connected to the bearing shaft, and a connecting hole corresponding to the thumbwheel with a concave arc structure on the end face is opened on the outer wall of the bearing shaft.

[0015] Preferably, an air-cooling circulation component is provided both inside and outside the base, and the air-cooling circulation component includes a cavity opened inside the base, and moist cotton pads are embedded on the front and rear groove walls of the thermal cutting groove.

[0016] Preferably, a fitting pressure plate is movably installed inside the cavity, pressure blocks are fixedly installed on the upper end surfaces at both ends of the fitting pressure plate, a third spring is fixedly installed on the bottom end surface of the fitting pressure plate, an air intake one-way valve tube is installed on the side wall of the cavity close to the thermal cutting groove, and an exhaust one-way valve tube is installed on the side wall of the cavity away from the thermal cutting groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention can always keep the electric thermal cutting knife clean through the cooperation of the rotation of the electric thermal cutting knife and the cleaning brush, which can ensure the flatness and accuracy of the cutting edge and improve product quality. At the same time, the upper and lower electric thermal cutting knives are automatically used alternately, which reduces the need for manual cleaning and tool replacement, and reduces the safety risks caused by improper operation; alternating the two electric thermal cutting knives can prevent a single tool from being subjected to high temperature and pressure for a long time, thereby reducing its wear rate; this can extend the service life of each electric thermal cutting knife and reduce the equipment maintenance cost of the enterprise.

[0019] 2. The present invention can reduce wrinkles and deformation during the cutting process by tightening the plastic bag, thereby ensuring the flatness and straightness of the cutting edge and improving the quality and appearance of the final product; during the hot cutting process, the cutting edge of the plastic bag is prone to melting and sticking due to the high temperature; by tightening the plastic bag, the contact area and pressure between the electric hot cutting knife and the plastic bag can be reduced, reducing the risk of adhesion, thereby preventing the cut plastic bags from sticking together or adhering to the electric hot cutting knife; and the synchronous movement of the anti-sticking tightening component helps to maintain the stability of the hot cutting knife during the cutting process, reducing cutting deviations or failures caused by movement or shaking of the plastic bag.

[0020] 3. The presence of static electricity in the present invention may affect the stability and position of the plastic bag, resulting in inaccurate cutting; the static electricity is conducted through the conductive ring, which can ensure that the plastic bag remains stable during the cutting process, thereby improving the cutting quality and accuracy; the conduction of static electricity makes the plastic bag more stable during the cutting process, reducing problems such as bag flying or position deviation caused by static electricity, thereby optimizing the production process and improving production efficiency.

[0021] 4. The present invention can accelerate the circulation of air around the hot cutting groove through the suction effect of the suction one-way valve tube, thereby cooling the plastic belt after hot cutting. The cooling effect helps to reduce the melting phenomenon generated in the hot cutting process, making the cutting edge more neat and smooth, reducing burrs and unevenness, thereby improving the cutting quality; by accelerating the air circulation, the suction one-way valve tube can quickly take away the heat around the hot cutting groove, so that the plastic bag reaches a suitable cooling temperature more quickly, thereby shortening the cooling time and improving production efficiency; during the hot cutting process, the plastic bag may be deformed due to heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is the overall structural view of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal structure of the base of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of the cutting seat of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the drive shaft of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the cleaning collection assembly of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of the air-cooling circulation component of the present invention;

[0029] Figure 7 For the present invention Figure 4 A schematic diagram of the partially enlarged structure at center A;

[0030] Figure 8 For the present invention Figure 6 A schematic diagram of the partially enlarged structure at B in the middle;

[0031] Fig. 9 For the present invention Figure 6 A schematic diagram of the partially enlarged structure at C in the middle;

[0032] Fig.10 It is a right view structural schematic diagram of the present invention.

[0033] Description of reference numerals:

[0034] 1. Base; 2. Support guide column; 3. Support top plate; 4. Hydraulic cylinder; 5. Cutting seat; 6. Cutting assembly; 601. Servo motor; 602. Drive shaft; 603. Cutting assembly seat; 604. Electric heat cutting knife; 605. Assembly slot; 606. Wire; 607. First spring; 608. Conductive contact; 609. Conductive seat; 610. Cleaning brush; 7. Cleaning collection assembly; 701. Cleaning guide groove; 702. Cleaning adsorption guide hole; 703. Separator; 704. Connector; 705. Adsorption catheter; 706 , collecting filter box; 707, adsorption pump; 8, anti-sticking tensioning component; 801, fixing seat; 802, bushing; 803, connecting rod; 804, bearing shaft; 805, dial; 806, connecting hole; 807, conductive wire; 808, conductive ring; 809, air inlet pipe; 810, second spring; 9, air-cooled circulation component; 901, pressure block; 902, cavity; 903, fitting pressure plate; 904, third spring; 905, suction check valve pipe; 906, exhaust check valve pipe; 907, moist cotton pad; 10, thermal cutting groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The present invention provides a technical solution:

[0037] See also Figure 1 , Figure 4 and Figure 7A thermal cutting device for plastic bag production comprises a base 1, a thermal cutting groove 10 is provided in the middle position of the top surface of the base 1, a support guide column 2 is fixedly installed on the top surface of the base 1, a cutting seat 5 is slidably sleeved on the outer walls of the plurality of support guide columns 2, and an anti-sticking tightening component 8 is provided at the bottom ends of the front and rear end surfaces of the cutting seat 5; a support top plate 3 is fixedly installed on the top ends of the plurality of support guide columns 2, a hydraulic cylinder 4 is fixedly installed in the middle position of the top surface of the support top plate 3, and the telescopic end of the hydraulic cylinder 4 passes through the support top plate 3 and is fixedly connected with the cutting seat 5; a cutting component 6 is provided inside and outside the cutting seat 5, and the cutting component 6 comprises a servo motor 601 fixedly installed on the outer wall of the left end of the cutting seat 5, and the output end of the servo motor 601 is fixedly connected with a driving shaft 602 located inside the cutting seat 5, and the driving shaft 602 is rotatably connected with the cutting seat 5, and the interior of the driving shaft 602 is hollow Structure: Cutting assembly seats 603 are fixedly installed on both ends of the left and right ends of the outer wall of the driving shaft 602, and an electric hot cutting knife 604 is detachably installed between two adjacent cutting assembly seats 603 on both sides. An assembly slot 605 is provided at the connection between the electric hot cutting knife 604 and the cutting assembly seat 603, and a conductive contact 608 is movably installed on the inner side of the assembly slot 605 away from the electric hot cutting knife 604; a wire 606 and a first spring 607 are movably installed inside the assembly slot 605, one end of the wire 606 and the first spring 607 are fixedly connected to the electric hot cutting knife 604, and the other end of the wire 606 and the first spring 607 are fixedly connected to the conductive contact 608, a conductive seat 609 is fixedly installed at the bottom end of the cutting seat 5 corresponding to the conductive contact 608, and a cleaning brush 610 is fixedly installed at the inner top end of the cutting seat 5 corresponding to the electric hot cutting knife 604, and the material of the cleaning brush 610 is nylon material.

[0038] By adopting the above technical solution, when in use, the servo motor 601 is started, and the servo motor 601 can drive the drive shaft 602 to rotate. The drive shaft 602 can drive the electric heat cutting knife 604 to rotate through the cutting assembly seat 603. When the cutting assembly seat 603 is about to rotate to the conductive seat 609, the arc-shaped contact at the top of the conductive contact 608 will contact and be squeezed with the conductive seat 609, so that the first spring 607 can be compressed. When the conductive contact 608 rotates to the middle position of the conductive seat 609, the first spring 607 is reset, so that the arc-shaped contact of the conductive contact 608 can contact with the groove conductive contact in the middle position of the conductive seat 609 to achieve electrical connection. In this way, the conductive contact 60 8 Electricity can be transmitted to the electric thermal cutting knife 604 through the wire 606. The electric thermal cutting knife 604 can heat itself by being energized. At this time, the electric thermal cutting knife 604 is in the middle position directly below the cutting seat 5. When thermal cutting is performed, the hydraulic cylinder 4 is started. The operation of the hydraulic cylinder 4 can drive the cutting seat 5 to move downward. The cutting seat 5 can slide up and down on the supporting guide column 2. The stability of the cutting seat 5 when moving up and down can be guaranteed by the supporting guide column 2. The set supporting top plate 3 can provide stable support for the operation of the hydraulic cylinder 4. The downward movement of the cutting seat 5 can drive the electric thermal cutting knife 604 to move downward, so that the plastic bag located above the thermal cutting groove 10 can be thermally cut by the electric thermal cutting knife 604.

[0039] When the cutting is completed, the cutting seat 5 drives the electric thermal cutting knife 604 to move upward under the action of the hydraulic cylinder 4. After the electric thermal cutting knife 604 completes the thermal cutting work and moves upward, the servo motor 601 can drive the electric thermal cutting knife 604 to rotate through the driving shaft 602 and the cutting assembly seat 603. At this time, the electric thermal cutting knife 604 located at the bottom is powered off and rotated to the top. During the rotation process, the electric thermal cutting knife 604 after the power is turned off will contact and rub with the cleaning brush 610 at the top, so that the electric thermal cutting knife 604 after the cutting is completed can be cleaned by the cleaning brush 610. In this way, the electric thermal cutting knife 604 can always be kept clean through the rotation of the electric thermal cutting knife 604 and the cooperation of the cleaning brush 610, which can ensure the flatness of the cutting edge The wholeness and precision of the product are improved. At the same time, the upper and lower electric thermal cutting knives 604 are automatically used alternately, which reduces the need for manual cleaning and tool replacement, and reduces the safety risks caused by improper operation. At the same time, the electric thermal cutting knife 604 that is rotated to the bottom is powered on for heating, so as to perform thermal cutting of the plastic bag. In this way, since there are two electric thermal cutting knives 604 used alternately, the cutting operation can be carried out continuously without interruption for cleaning or tool replacement, thereby significantly improving production efficiency. Alternating the two electric thermal cutting knives 604 can avoid a single knife from being subjected to high temperature and pressure for a long time, thereby reducing its wear rate. This can extend the service life of each electric thermal cutting knife 604 and reduce the equipment maintenance cost of the enterprise.

[0040] Specifically, Figure 1 , Figures 3 to 6 , Figure 8-Figure 10 As shown, the anti-sticking tensioning component 8 includes a fixed seat 801 fixedly installed at the bottom end of the front and rear end surfaces of the cutting seat 5, a shaft sleeve 802 is rotatably installed inside the fixed seat 801, a connecting rod 803 is fixedly installed on the bottom end surface of the shaft sleeve 802, a bearing shaft 804 is rotatably installed between the inner bottom ends of the two adjacent connecting rods 803 on the left and right, the interior of the bearing shaft 804 is a hollow structure, a thumbwheel 805 is rotatably installed on the outer end surface of the bearing shaft 804, and a plurality of thumbwheels 805 are provided, and a second spring 810 is fixedly installed below the fixed seat 801 on the front and rear end surfaces of the cutting seat 5, and the second spring 810 is fixedly connected to the connecting rod 803 at one end away from the cutting seat 5, and the second spring 810 is designed The second spring 810 can be extended when the connecting rod 803 rotates, so that the second spring 810 can store elastic force. When the connecting rod 803 rotates without any force, the second spring 810 can retract the connecting rod 803 through its own elastic recovery, so that the connecting rod 803 returns to its initial position; a conductive ring 808 is embedded on the circumferential surface of the thumbwheel 805, and an electric conductive wire 807 is fixedly connected to the end surface of the conductive ring 808 located inside the thumbwheel 805. The electric conductive wire 807 runs through the interior of multiple thumbwheels 805, and the end surfaces of the thumbwheels (805) on the left and right sides that are away from each other are concave arc structures, and there are three thumbwheels 805 with concave arc structures on the left and right sides.

[0041] The inside and outside of the cutting seat 5 are jointly installed with a cleaning collection assembly 7, which includes a cleaning guide groove 701 fixedly installed in the middle position of the outer wall of the driving shaft 602, and the inside of the cleaning guide groove 701 and the driving shaft 602 are both provided with a cleaning adsorption guide hole 702, and a partition plate 703 parallel to the cleaning guide groove 701 is fixedly installed in the middle position of the driving shaft 602; the right end of the inside of the driving shaft 602 is rotatably connected to a connector 704, and the inside of the connector 704 is penetrated with an adsorption conduit 705, and the connector 704 The arrangement can ensure that the adsorption duct 705 and the driving shaft 602 are stably connected to each other. A collecting filter box 706 and an adsorption pump 707 that are connected to each other are fixedly installed on the outer wall of the right end of the cutting seat 5. The collecting filter box 706 is located below the adsorption pump 707. The output end of the adsorption pump 707 is fixedly connected to an air inlet pipe 809. The end of the air inlet pipe 809 away from the adsorption pump 707 is rotatably connected to the bearing shaft 804. A connecting hole 806 corresponding to the thumbwheel 805 with a concave arc structure on the end face is opened on the outer wall of the bearing shaft 804.

[0042] By adopting the above technical solution, when the electric hot cutting knife 604 rotates and cooperates with the cleaning brush 610 for cleaning, the plastic residues swept away by the friction between the cleaning brush 610 and the electric hot cutting knife 604 will fall into the cleaning guide groove 701 with an arc structure, and the adsorption pump 707 is started. The adsorption pump 707 can generate suction to the inside of the hollow driving shaft 602 through the collecting filter box 706 and the adsorption conduit 705. The cleaning adsorption guide hole 702 opened on the driving shaft 602 and the cleaning guide groove 701 can adsorb the plastic residues dropped in the cleaning guide groove 701, so that the plastic residues can be adsorbed into the collecting filter box 706 through the hollow driving shaft 602 and the adsorption conduit 705. The collecting filter box 706 has a filter pad, which can filter out the adsorbed plastic residues and leave them in the collecting filter box 706. The air is discharged into the air inlet pipe 809 through the adsorption pump 707, thereby completing the collection of plastic residues; the plastic residues generated by the hot cutting knife can be effectively collected by the cleaning collection component 7 to keep the production environment clean; and timely cleaning of plastic residues can reduce the risk of fire caused by dust accumulation or residues, and improve production safety; the collected plastic residues can be recycled and reused, which is in line with the concepts of environmental protection and sustainable development; by effectively collecting and processing plastic residues, waste emissions in the production process are reduced; it should be noted that the partition plate 703 can divide the interior of the drive shaft 602 into two upper and lower cavities, and the end of the adsorption conduit 705 is always connected to the cavity rotated to the top, thereby avoiding the adsorption effect of the adsorption conduit 705 on the electric hot cutting knife 604 below.

[0043] When the hydraulic cylinder 4 works to drive the cutting seat 5 to move downward, the cutting seat 5 can drive the anti-sticking tensioning component 8 to move downward, so that the thumbwheel 805 can contact the plastic bag placed on the base 1. Through the continuous downward movement of the anti-sticking tensioning component 8, the connecting rod 803 with a certain inclination away from the cutting seat 5 can rotate on the fixed seat 801 through the shaft sleeve 802, so that the thumbwheel 805 can rotate on the contacted plastic bag through the load-bearing shaft 804. Through the symmetrical arrangement of the anti-sticking tensioning component 8 on the front and rear sides of the cutting seat 5, the symmetrical thumbwheel 805 can flatten and tighten the plastic bag on both sides, thereby tightening the plastic bag. , which can reduce wrinkles and deformation during the cutting process, thereby ensuring the flatness and straightness of the cutting edge and improving the quality and appearance of the final product; during the thermal cutting process, due to the high temperature, the cut edge of the plastic bag is prone to melting and sticking; by tightening the plastic bag, the contact area and pressure between the electric hot cutting knife 604 and the plastic bag can be reduced, reducing the risk of adhesion, thereby preventing the cut plastic bags from sticking together or adhering to the electric hot cutting knife 604; and the synchronous movement of the anti-sticking tightening component 8 helps to maintain the stability of the hot cutting knife during the cutting process, reducing cutting deviations or failures caused by movement or shaking of the plastic bag.

[0044] When the thumbwheel 805 contacts the plastic bag, the conductive ring 808 also contacts the plastic bag, so that the conductive ring 808 can conduct the static electricity generated by the plastic bag during movement. The conductive rings 808 are connected to each other through the conductive wires 807, so that the static electricity can flow between the conductive rings 808. When the conductive rings 808 and the thumbwheel 805 at both ends contact each other and squeeze the pressing block 901, the conductive ring 808 can transfer the conducted static electricity to the pressing block 901. Through the connection between the pressing block 901 and the base 1, the conducted static electricity can be grounded through the base 1. The presence of static electricity may affect the stability and position of the plastic bag, thereby causing inaccurate cutting. The conduction of static electricity through the conductive ring 808 can ensure that the plastic bag remains stable during the cutting process, thereby improving the cutting quality and accuracy. The conduction of static electricity makes the plastic bag more stable during the cutting process, reduces problems such as bag flying or position displacement caused by static electricity, thereby optimizing the production process and improving production efficiency.

[0045] The adsorption pump 707 in working state can discharge the filtered and adsorbed gas through the air inlet pipe 809, so that the air inlet pipe 809 can introduce the gas into the hollow load-bearing shaft 804, and the gas can be discharged through the connecting hole 806 opened on the load-bearing shaft 804. The gas discharged from the connecting hole 806 can be blown to the edge of the plastic bag through the thumbwheel 805 with a concave arc structure, which can reduce the problem of edge wrinkles of the plastic bag during the transportation process. The squeezing effect of the thumbwheel 805 on the plastic bag and the blowing effect of the gas help to fix the position of the plastic bag and reduce its shaking or displacement during the cutting process, thereby improving the cutting stability; and the flow of gas helps to take away the static electricity generated during the cutting process, reducing the adverse effects of static electricity on the plastic bag and the cutting device.

[0046] Specifically, Figure 1 , Figure 2 and Figure 6 As shown, the inside and outside of the base 1 are jointly provided with an air-cooling circulation component 9, and the air-cooling circulation component 9 includes a cavity 902 opened inside the base 1, and moist cotton pads 907 are embedded on the front and rear groove walls of the thermal cutting groove 10; a fitting pressure plate 903 is movably installed inside the cavity 902, and pressure blocks 901 are fixedly installed on the upper end surfaces of the left and right ends of the fitting pressure plate 903, and a third spring 904 is fixedly installed on the bottom end surface of the fitting pressure plate 903, an air intake one-way valve pipe 905 is installed on the side wall of the cavity 902 close to the thermal cutting groove 10, and an exhaust one-way valve pipe 906 is installed on the side wall of the cavity 902 away from the thermal cutting groove 10.

[0047] By adopting the above technical solution, when in use, when the two ends of the anti-sticking tensioning component 8 contact with the pressing block 901 and squeeze the pressing block 901, the pressing block 901 will drive the fitting pressing plate 903 to move downward in the cavity 902 and compress the third spring 904, so that the internal space at the upper end of the fitting pressing plate 903 can be increased, and then air can be sucked into the cavity 902 through the suction one-way valve tube 905. The suction effect of the suction one-way valve tube 905 can accelerate the circulation of air around the hot cutting groove 10, so that the plastic belt after hot cutting can be cooled. The cooling effect helps to reduce the melting phenomenon generated during the hot cutting process, making the cutting edge more neat and smooth, reducing burrs and unevenness, thereby improving the cutting quality; by accelerating the air circulation, the suction one-way valve tube 905 can quickly take away the hot cutting groove 10 0, so that the plastic bag reaches a suitable cooling temperature faster, thereby shortening the cooling time and improving production efficiency; during the thermal cutting process, the plastic bag may be deformed due to heat; the cooling effect of the suction check valve tube 905 helps to maintain the shape of the plastic bag stable and prevent thermal deformation, thereby ensuring the quality and dimensional accuracy of the product; when the pressing block 901 is not under pressure, the elastic force of the third spring 904 can push the pressing block 901 to move upward, so that the air sucked into the cavity 902 can be discharged through the exhaust check valve tube 906, and the moist cotton pad 907 provided at the same time can increase the humidity of the air circulating around the thermal cutting groove 10, and then cooperate with the suction of the suction check valve tube 905 to further improve the cooling effect of the plastic bag after thermal cutting, and avoid problems such as wire drawing at the edge of the plastic bag during thermal cutting.

[0048] Working principle: When in use, start the servo motor 601, the servo motor 601 can drive the drive shaft 602 to rotate, and the drive shaft 602 can drive the electric heat cutting knife 604 to rotate through the cutting assembly seat 603. When the cutting assembly seat 603 is about to rotate to the conductive seat 609, the arc-shaped contact at the top of the conductive contact 608 will contact and be squeezed with the conductive seat 609, so that the first spring 607 can be compressed. When the conductive contact 608 rotates to the middle position of the conductive seat 609, the first spring 607 is reset. Thus, the arc-shaped contact of the conductive contact 608 can contact with the groove conductive contact in the middle of the conductive seat 609 to achieve electrical connection, so that the conductive contact 608 can transmit electricity to the electric heat cutting knife 604 through the wire 606, and the electric heat cutting knife 604 can heat itself when it is powered on. At this time, the electric heat cutting knife 604 is in the middle position just below the cutting seat 5. When one of the electric heat cutting knives 604 rotates to the bottom, the other electric heat cutting knife 604, which has been powered off, will contact with the cleaning brush 610 at the top. The electric heat cutting blade 604 can be cleaned by the cleaning brush 610 after the cutting is completed. In this way, the electric heat cutting blade 604 can always be kept clean by the rotation of the electric heat cutting blade 604 and the cooperation of the cleaning brush 610. At the same time, the plastic residues swept away by the friction between the cleaning brush 610 and the electric heat cutting blade 604 will fall into the cleaning guide groove 701 with an arc structure, and the adsorption pump 707 is started. The adsorption pump 707 can collect the filter box 706 and the adsorption conduit 705 to the driving shaft 602 of the hollow structure. Suction is generated internally, and the cleaning adsorption guide hole 702 opened on the driving shaft 602 and the cleaning guide groove 701 can adsorb the plastic residues dropped in the cleaning guide groove 701, so that the plastic residues can be adsorbed into the collecting filter box 706 through the hollow driving shaft 602 and the adsorption duct 705. The collecting filter box 706 has a filter pad, which can filter out the adsorbed plastic residues and remain in the collecting filter box 706, so that the air is discharged into the intake pipe 809 through the adsorption pump 707, thereby completing the collection of the plastic residues.

[0049] When thermal cutting is performed, the hydraulic cylinder 4 is started, and the operation of the hydraulic cylinder 4 can drive the cutting seat 5 to move downward, and the cutting seat 5 can slide up and down on the supporting guide column 2. The stability of the cutting seat 5 when moving up and down can be ensured by the supporting guide column 2. The downward movement of the cutting seat 5 can drive the electric thermal cutting knife 604 to move downward, so that the plastic bag located above the thermal cutting groove 10 can be thermally cut by the electric thermal cutting knife 604; when the hydraulic cylinder 4 works to drive the cutting seat 5 to move downward, the cutting seat 5 can drive the anti-sticking tensioning component 8 moves downward, so that the thumbwheel 805 can contact the plastic bag placed on the base 1. By continuously moving downward the anti-sticking tensioning assembly 8, the connecting rod 803 which is inclined in a certain direction away from the cutting seat 5 can rotate on the fixing seat 801 through the shaft sleeve 802. In this way, the thumbwheel 805 can rotate on the contacted plastic bag through the bearing shaft 804. By symmetrically arranging the anti-sticking tensioning assembly 8 on the front and rear sides of the cutting seat 5, the symmetrical thumbwheel 805 can flatten and tighten the plastic bag on both sides. When the conductive ring 805 contacts the plastic bag, the conductive ring 808 also contacts the plastic bag, so that the conductive ring 808 can conduct the static electricity generated by the plastic bag during the movement. The conductive rings 808 are connected to each other through the conductive wire 807, so that the static electricity can flow between the conductive rings 808. When the conductive rings 808 at both ends and the dial wheel 805 contact the pressing block 901 and squeeze the pressing block 901, the conductive ring 808 can transfer the conducted static electricity to the pressing block 901, and the pressing block 901 and the base 1 are connected. The connection can allow the conducted static electricity to be grounded through the base 1, and at the same time, the adsorption pump 707 in working state can discharge the filtered and adsorbed gas through the air inlet pipe 809, so that the air inlet pipe 809 can introduce the gas into the hollow load-bearing shaft 804, and the gas can be discharged through the connecting hole 806 opened on the load-bearing shaft 804. The gas discharged from the connecting hole 806 can be blown to the edge of the plastic bag through the thumbwheel 805 with a concave arc structure, which can reduce the problem of edge wrinkles of the plastic bag during the transmission process.

[0050] When the two ends of the anti-sticking tensioning component 8 contact with the pressing block 901 and squeeze the pressing block 901, the pressing block 901 will drive the fitting pressing plate 903 to move downward in the cavity 902 and compress the third spring 904, so that the internal space at the upper end of the fitting pressing plate 903 can be increased, and then air can be sucked into the cavity 902 through the suction one-way valve tube 905. The suction effect of the suction one-way valve tube 905 can accelerate the circulation of air around the hot cutting groove 10, thereby cooling the plastic belt after hot cutting. When the pressing block 901 is not under pressure, the elastic force of the third spring 904 is restored, which can push the pressing block 901 to move upward, so that the air sucked into the cavity 902 can be discharged through the exhaust one-way valve tube 906. At the same time, the moist cotton pad 907 can increase the humidity of the air circulating around the hot cutting groove 10, and then cooperate with the suction of the suction one-way valve tube 905 to further improve the cooling effect of the plastic bag after hot cutting.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal cutting device for plastic bag production, comprising a base (1), characterized in that: A heat cutting groove (10) is provided in the middle of the top surface of the base (1), a support guide column (2) is fixedly mounted on the top surface of the base (1), a cutting seat (5) is slidably sleeved on the outer walls of a plurality of the support guide columns (2), and an anti-sticking tightening component (8) is provided at the bottom ends of the front and rear end surfaces of the cutting seat (5); The anti-sticking tensioning component (8) includes a fixed seat (801) fixedly mounted on the bottom ends of the front and rear end surfaces of the cutting seat (5); a shaft sleeve (802) is rotatably mounted inside the fixed seat (801); a connecting rod (803) is fixedly mounted on the bottom end surface of the shaft sleeve (802); a bearing shaft (804) is rotatably mounted between the inner bottom ends of two adjacent connecting rods (803) on the left and right; the interior of the bearing shaft (804) is a hollow structure; a thumbwheel (805) is rotatably mounted on the outer end surface of the bearing shaft (804); a plurality of thumbwheels (805) are provided; a second spring (810) is fixedly mounted on the front and rear end surfaces of the cutting seat (5) below the fixed seat (801); and the second spring (810) is fixedly connected to the connecting rod (803) at one end away from the cutting seat (5).

2. A thermal cutting device for plastic bag production according to claim 1, characterized in that: A conductive ring (808) is embedded on the circumferential surface of the thumbwheel (805), and an electric conductive wire (807) is fixedly connected to the end surface of the conductive ring (808) located inside the thumbwheel (805). The electric conductive wire (807) runs through the interior of multiple thumbwheels (805). The end surfaces of the thumbwheels (805) on the left and right sides that are away from each other are concave arc structures, and there are three thumbwheels (805) with concave arc structures on the left and right sides.

3. A thermal cutting device for plastic bag production according to claim 1, characterized in that: A supporting top plate (3) is fixedly mounted on the top ends of the plurality of supporting guide columns (2), a hydraulic cylinder (4) is fixedly mounted at the middle position of the top end surface of the supporting top plate (3), and a telescopic end of the hydraulic cylinder (4) passes through the supporting top plate (3) and is fixedly connected to the cutting seat (5).

4. A thermal cutting device for plastic bag production according to claim 1, characterized in that: A cutting assembly (6) is provided inside and outside the cutting seat (5), and the cutting assembly (6) comprises a servo motor (601) fixedly mounted on the outer wall of the left end of the cutting seat (5), and an output end of the servo motor (601) is fixedly connected to a drive shaft (602) located inside the cutting seat (5), and the drive shaft (602) is rotatably connected to the cutting seat (5), and the interior of the drive shaft (602) is a hollow structure.

5. A thermal cutting device for plastic bag production according to claim 4, characterized in that: Cutting assembly seats (603) are fixedly installed at both left and right ends of the outer wall of the driving shaft (602), and an electric heat cutting knife (604) is detachably installed between two adjacent cutting assembly seats (603) on both sides. An assembly slot (605) is provided at the connection between the electric heat cutting knife (604) and the cutting assembly seat (603), and a conductive contact (608) is movably installed inside the assembly slot (605) on a side away from the electric heat cutting knife (604).

6. A thermal cutting device for plastic bag production according to claim 5, characterized in that: A conductive wire (606) and a first spring (607) are movably installed inside the assembly slot (605); one end of the conductive wire (606) and the first spring (607) are fixedly connected to the electric heat cutting knife (604); the other end of the conductive wire (606) and the first spring (607) are fixedly connected to the conductive contact (608); a conductive seat (609) is fixedly installed at the bottom end of the cutting seat (5) corresponding to the conductive contact (608); and a cleaning brush (610) is fixedly installed at the top end of the cutting seat (5) corresponding to the electric heat cutting knife (604).

7. A thermal cutting device for plastic bag production according to claim 2, characterized in that: A cleaning collection assembly (7) is installed on the inside and outside of the cutting seat (5), and the cleaning collection assembly (7) comprises a cleaning guide groove (701) fixedly installed in the middle position of the outer wall of the driving shaft (602), and cleaning adsorption guide holes (702) are provided inside the cleaning guide groove (701) and the driving shaft (602), and a partition plate (703) parallel to the cleaning guide groove (701) is fixedly installed in the middle position inside the driving shaft (602).

8. A thermal cutting device for plastic bag production according to claim 7, characterized in that: The right inner end of the driving shaft (602) is rotatably connected to a connector (704), an adsorption duct (705) is inserted into the interior of the connector (704), a collection filter box (706) and an adsorption pump (707) are fixedly mounted on the outer wall of the right end of the cutting seat (5), the collection filter box (706) is located below the adsorption pump (707), the output end of the adsorption pump (707) is fixedly connected to an air intake pipe (809), the end of the air intake pipe (809) away from the adsorption pump (707) is rotatably connected to the bearing shaft (804), and a connecting hole (806) corresponding to the thumbwheel (805) with a concave arc structure on the end surface is opened on the outer wall of the bearing shaft (804).

9. A thermal cutting device for plastic bag production according to claim 1, characterized in that: The inside and outside of the base (1) are jointly provided with an air-cooling circulation component (9), and the air-cooling circulation component (9) includes a cavity (902) opened inside the base (1), and wet cotton pads (907) are embedded on the front and rear groove walls of the thermal cutting groove (10).

10. A thermal cutting device for plastic bag production according to claim 9, characterized in that: A laminating pressure plate (903) is movably installed inside the cavity (902), and pressure blocks (901) are fixedly installed on the upper end surfaces of the left and right ends of the laminating pressure plate (903), and a third spring (904) is fixedly installed on the bottom end surface of the laminating pressure plate (903). An air intake check valve tube (905) is installed on the side wall of the cavity (902) close to the thermal cutting groove (10), and an air exhaust check valve tube (906) is installed on the side wall of the cavity (902) away from the thermal cutting groove (10).

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