High-precision non-woven bag heat sealing and laminating device

Abstract

The application provides a high-precision non-woven bag heat-seal lamination processing device and relates to the technical field of non-woven bag making.The device comprises a rack, a pay-off support is arranged on one side of the upper end of the rack, a first pay-off roller and a second pay-off roller are respectively arranged on the pay-off support, a winding support is arranged on the other side of the upper end of the rack, a first winding roller and a second winding roller are respectively arranged on the winding support, upper-layer non-woven fabric is wound and unwound between the first pay-off roller and the first winding roller, lower-layer non-woven fabric is wound and unwound between the second pay-off roller and the second winding roller, a mounting table is arranged in the middle of the rack, a pressing mechanism is arranged on the mounting table, and the pressing mechanism comprises an upper pressing plate assembly and a lower pressing plate assembly. Through one-time pressing action of the pressing mechanism, three-edge heat sealing of double-layer non-woven fabric and bag contour cutting are simultaneously completed, separate cloth cutting equipment and manual semi-finished product transfer links are omitted, cloth bag forming time is compressed, production capacity loss caused by multiple processes is eliminated, and production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of nonwoven bag making technology, and in particular to a high-precision heat-sealing and bonding device for nonwoven bags. Background Technology

[0002] Non-woven bags are non-woven fabric products made primarily of polypropylene (PP). They are the mainstream environmentally friendly alternative to non-degradable plastic bags and are widely used in supermarket shopping, restaurant packaging, gift packaging, and other scenarios. Currently, the mainstream manufacturing process for non-woven bags adopts a two-stage, separate processing method: the first step uses a separate cutting device to cut a single layer of non-woven fabric into bag blanks; the second step involves manually transferring the two cut pieces of fabric to an independent hot-pressing device for alignment and sewing. This separate processing approach suffers from a series of unresolved production shortcomings: The process is fragmented, resulting in extremely low production efficiency. Cutting and hot pressing are done on two separate machines, and manual sorting and handling of semi-finished products are required between the two processes. There are many steps in the production flow of a single batch, and the proportion of manual time is high. The output of bags per unit time is limited, and the capacity bottleneck is prominent when mass production is carried out. Poor alignment of double-layer fabrics leads to a high defect rate. When two pieces of cut blanks are manually placed on the hot press mold, lateral shift and vertical misalignment are very likely to occur, resulting in inconsistent edge widths and oversized bags in the final product. A large number of substandard bags result in a waste of non-woven fabric raw materials. Two independent heat-sealing operations are required, which can easily lead to incomplete or missing seals. Traditional heat-pressing plates can only press one side at a time, and the three sides of the bag need to be sealed with heat-pressing twice. Multiple heating and pressing can easily cause localized poor adhesion, making the finished product prone to cracking during use. The rework process further slows down the production schedule. After cutting, the fabric bag completely falls off, requiring frequent machine shutdowns for cleaning. Ordinary straight-cutting blades cause the fabric bag to completely separate from the raw material, resulting in semi-finished products scattering and piling up on the hot press table. Operators need to stop the machine periodically to pick up and clean these items, significantly shortening the equipment's effective continuous operating time. The production line occupies a large space and has high investment costs. The cutting and hot pressing equipment are equipped with two sets of conveying and electrical control systems. The costs of equipment procurement, factory space, and operation and maintenance labor are all relatively high, making it difficult for small processing plants to equip themselves with a complete production line.

[0003] Based on this, this application proposes a high-precision nonwoven bag heat sealing and bonding processing device. Summary of the Invention

[0004] This invention addresses the pain points of existing non-woven bag manufacturing processes, which involve separate cutting, manual transfer, and hot pressing, resulting in low efficiency, numerous defects, and frequent downtime. This invention integrates feeding, deviation correction, simultaneous three-sided heat sealing, semi-cutting, and automatic ejection into a single workstation, completing the bag forming process in one integrated manner.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A high-precision nonwoven bag heat-sealing and bonding processing device includes a frame. An unwinding support is provided on one side of the upper end of the frame, and a first unwinding roller and a second unwinding roller are respectively mounted on the unwinding support. A winding support is provided on the other side of the upper end of the frame, and a first winding roller and a second winding roller are respectively mounted on the winding support. The upper layer of nonwoven fabric is wound and unwound between the first unwinding roller and the first winding roller, and the lower layer of nonwoven fabric is wound and unwound between the second unwinding roller and the second winding roller. The frame is provided with a mounting platform in the middle, and a pressing mechanism is provided on the mounting platform. The pressing mechanism includes an upper pressing plate assembly and a lower pressing plate assembly. The upper and lower non-woven fabrics pass through the upper pressing plate assembly and the lower pressing plate assembly in parallel. They are bonded together by relative heat pressing of the upper pressing plate assembly and the lower pressing plate assembly to form a bag shape. At the same time, the non-woven bag formed by pressing is cut off by the cutting blade assembly on the upper pressing plate assembly.

[0006] Furthermore, the upper pressure plate assembly includes an upper support plate and an upper pressing plate. The upper pressing plate is fixedly installed on the lower surface of the upper support plate, and the upper pressing plate is a frame shape with three sides closed and one side open. The interior of the upper pressing plate is provided with a heating element for heating the pressing surface of the upper pressing plate. The lower pressure plate assembly includes a lower support plate and a lower pressing plate. The lower pressing plate is fixedly installed on the upper surface of the lower support plate, and the shape of the lower pressing plate matches that of the upper pressing plate. It also has a heating element inside for heating the pressing surface of the lower pressing plate. When in use, the upper and lower pressing plates are brought close together and pressed to heat-press the upper and lower non-woven fabrics together, forming a bag shape that is closed on three sides and open on one side.

[0007] Furthermore, the upper pressing plate is provided with a cutting assembly on the lower part of the three outer walls and one open side, and the outer side of the lower pressing plate is provided with a pad that matches the cutting assembly; when the non-woven fabric is hot-pressed and bonded, the cutting assembly presses down to cut the hot-pressed non-woven bag off the non-woven fabric.

[0008] Furthermore, the cutting blade assembly includes a cutting blade and a mounting frame. The mounting frame is fixedly mounted on the outer wall of the upper pressing plate and has an inner cavity. The upper end of the cutting blade has a connecting part, which is movably inserted into the inner cavity of the mounting frame. The inner cavity of the mounting frame has multiple springs, with the two ends of the springs respectively abutting against the upper end of the connecting part and the top of the inner cavity. The cutting blade is lower than the lower end face of the upper pressing plate.

[0009] As the upper pressing plate moves downward, the cutting blade moves accordingly. The blade first contacts the non-woven fabric, and then the upper pressing plate continues to press down, compressing the spring and applying elastic pressure to the cutting blade, causing it to cut the non-woven fabric.

[0010] Furthermore, the pressing mechanism includes side frames symmetrically arranged on the mounting platform, with a driving component between the two side frames. The middle part of the driving component is rotatably connected to the side frame via a driving component mounting shaft, and both ends of the driving component mounting shaft are fitted with torsion springs. One end of the torsion spring is connected to the end of the driving component mounting shaft, and the other end is connected to the side frame. Both ends of the driving component are rotatably connected to driving rods. The movable end of one driving rod is rotatably connected to a top plate, and both ends of the top plate are fixedly connected to a first connecting rod. The lower end of the first connecting rod extends downward through the mounting platform and connects to a lower support plate. The movable end of the other driving rod is rotatably connected to a bottom plate, and both ends of the bottom plate are connected to a second connecting rod. The lower end of the second connecting rod extends downward through the mounting platform and connects to an upper support plate. A drive motor is provided on the outer side of the side frame. The output end of the drive motor is connected to a cam mounting shaft. The two ends of the cam mounting shaft are rotatably connected to the side frames on both sides. A cam is provided in the middle of the cam mounting shaft. When the drive motor works, it drives the cam to rotate. The cam will squeeze one end of the drive component, causing the drive component to rotate. This will drive the first connecting rod to move upward and the second connecting rod to move downward, so that the upper support plate and the lower support plate move relative to each other, completing the non-woven fabric hot pressing action. When the cam continues to rotate, the end of the cam disengages from the drive component, and the drive component resets under the action of the torsion spring. At this time, the upper support plate and the lower support plate move away from each other, and the hot pressing action ends.

[0011] Furthermore, guide rollers are rotatably provided on the outer sides of the two support pillars of the mounting platform, and the non-woven fabric on the unwinding roller is wound onto the take-up roller via the guide rollers.

[0012] Furthermore, the inner side of the support column near the unwinding bracket of the mounting platform is provided with a correction mechanism. The correction mechanism includes a mounting plate, which is fixedly connected to the support column. The lower end face of the mounting plate is provided with a slide rail, and the slide rail is provided with a slide block. The two ends of the slide block are vertically provided with correction rollers. The lower end face of the mounting plate is also provided with a correction cylinder, which is arranged parallel to the slide rail. The telescopic end of the correction cylinder is fixedly connected to the slide block through a connecting block. In use, the extension and retraction of the correction cylinder drives the slide and correction roller to move laterally left and right, thereby correcting the position of the nonwoven fabric and preventing deviation.

[0013] Furthermore, the cutting blade has notches evenly distributed in a straight line, so that after the cutting blade cuts the non-woven fabric, the non-woven bag and the non-woven fabric are not completely separated, but continue to move backward with the non-woven fabric, preventing the non-woven bag from falling directly onto the lower pressure plate assembly below and affecting subsequent operations.

[0014] Furthermore, the upper surface of the mounting platform is provided with an ejection mechanism at one end near the winding bracket. The ejection mechanism includes a drive cylinder, which is installed at the upper end of the mounting platform. The telescopic end of the drive cylinder extends downward through the mounting platform and is connected to the ejection plate. The drive cylinder extends, causing the ejector plate to descend and eject the non-woven bag that is not completely disconnected, detaching it from the non-woven fabric masterbatch.

[0015] Furthermore, the upper part of the frame is also equipped with a conveyor belt, with both ends of the conveyor belt mounted on the inner wall of the frame via drive shafts. One end of the conveyor belt is located below the top plate, and the other end extends to the very end of the frame near the winding bracket. A conveyor motor is provided on the rear side of the frame, and the output end of the conveyor motor is connected to one of the drive shafts of the conveyor belt. The operation of the conveyor motor drives the conveyor belt to rotate, conveying the cut non-woven bags out.

[0016] Compared with the prior art, the beneficial effects of the present invention include: This invention uses a pressing mechanism to simultaneously heat-seal the three sides of the double-layer nonwoven fabric and cut the bag outline in one pressing action, eliminating the need for separate fabric cutting equipment and manual transfer of semi-finished products. This reduces the forming time of a single bag, eliminates the production capacity loss caused by multiple processes, and improves production efficiency.

[0017] This invention features a first unwinding roller and a second unwinding roller that simultaneously output two layers of fabric. A matching correction mechanism corrects the lateral offset of the fabric in real time, ensuring that the two layers of fabric are always precisely aligned before heat sealing and cutting. This eliminates the need for manual placement of the blanks, keeps the edge sealing size error to a very small range, significantly reduces size-related defects, and saves on nonwoven fabric raw material waste.

[0018] This invention's frame-type upper pressing plate achieves simultaneous heat sealing on three sides in one go, avoiding incomplete or missed seals from multiple heat sealing operations. The upper pressing plate is a three-sided closed frame with heaters evenly arranged inside. A single pressing operation simultaneously completes the sealing of the bottom and two sides of the bag, eliminating the need for secondary heat pressing. The heat pressing is uniformly applied throughout, resulting in stable edge bonding strength and reducing the need for rework due to bag cracking.

[0019] The cutting assembly of this invention uses a cutting blade with a semi-circular notch to achieve partial cutting, preventing the cloth bag from falling off and jamming the machine. After cutting, the cloth bag still retains a connection section with the master material belt and will not directly accumulate on the lower pressure plate assembly. The equipment can operate continuously for a long time, greatly reducing the frequency of downtime for cleaning and significantly increasing the effective working time.

[0020] This invention employs a cam and a symmetrical linkage structure with torsion springs on both sides, with the upper and lower pressure plates applying pressure synchronously in opposite directions, ensuring even pressure across the entire double-layer fabric. Compared to traditional hot presses driven by a single-sided cylinder, it avoids localized insufficient pressure or incomplete sealing, eliminates the need for manual secondary pressure replenishment, further simplifies the production process, and improves overall production efficiency.

[0021] This invention features a matching ejection mechanism that automatically separates from and transports finished products via a conveyor belt. After the semi-connected bag moves to the workstation with the conveyor belt, a drive cylinder drives the ejection plate to automatically eject the finished product, while the conveyor belt continuously transports it outwards. The entire process eliminates the need for manual pickup of semi-finished products, further reducing reliance on manual labor and optimizing the automation level of the production line. Attached Figure Description

[0022] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts. Wherein: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a front view of the invention in operation; Figure 4 This is a schematic diagram of the pressing mechanism in this invention; Figure 5 This is a schematic diagram of the bottom structure of the pressing mechanism in this invention; Figure 6 This is a partial structural schematic diagram of the pressing mechanism in this invention; Figure 7 This is a schematic diagram of the structure of the cam and torsion spring in this invention; Figure 8 This is a schematic diagram of the upper pressure plate assembly and the lower pressure plate assembly in this invention; Figure 9 This is a schematic diagram of the upper pressure plate assembly in this invention; Figure 10 This is a schematic diagram of the correction mechanism in this invention; Figure 11 This is a schematic diagram of the cutting blade assembly in this invention; Figure 12 for Figure 11 A magnified structural diagram of A in the middle.

[0023] Numbering on the map: 1. Frame; 2. Unwinding support; 3. First unwinding roll; 4. Second unwinding roll; 5. Mounting platform; 6. Guide roll; 7. Tracking mechanism; 8. Pressing mechanism; 9. Ejection mechanism; 10. First take-up roll; 11. Second take-up roll; 12. Take-up support; 13. Upper pressure plate assembly; 14. Lower pressure plate assembly; 15. Heater; 16. Conveyor belt; 17. Conveyor motor; 18. Take-up motor; 701. Mounting plate; 702. Slide rail; 703. Slide block; 704. Correcting roller; 705. Correcting cylinder; 801. Side frame; 802. Top plate; 803. First connecting rod; 804. Cam; 805. Drive motor; 806. Second connecting rod; 807. Drive component; 808. Drive component mounting shaft; 809. Drive rod; 810. Base plate; 811. Cam mounting shaft; 812. Torsion spring; 901. Drive cylinder; 902. Ejector plate; 1301. Lower support plate; 1302. Lower pressing plate; 1303. Pad plate; 1401. Upper support plate; 1402. Upper pressing plate; 1403. Cutting blade assembly; 14031. Cutting blade; 14032. Connecting part; 14033. Mounting frame; 14034. Spring. Detailed Implementation

[0024] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0025] like Figures 1 to 12 As shown, this embodiment discloses a high-precision non-woven bag heat-sealing and bonding processing device. The main body of the machine is a steel frame 1, which is formed by welding square tubes. Adjustable support feet are set at the four corners of the bottom to facilitate leveling the machine. The unwinding bracket 2 is welded and fixed to the left end of the frame 1. The unwinding bracket 2 is equipped with a first unwinding roller 3 and a second unwinding roller 4 in parallel. The first unwinding roller 3 is used to wind the upper layer of non-woven fabric roll, and the second unwinding roller 4 is used to wind the lower layer of non-woven fabric roll. The winding bracket 12 is welded and fixed to the right end of the frame 1. The first winding roller 10 and the second winding roller 11 are installed on the winding bracket 12. The outer flange of the winding bracket 12 is fixed to the winding motor 18. The output shaft of the winding motor 18 synchronously drives the first winding roller 10 and the second winding roller 11 to rotate, so as to realize the synchronous and uniform traction and conveying of the upper and lower layers of non-woven fabric (in this embodiment, two winding motors 18 are used to drive the first winding roller 10 and the second winding roller 11 to rotate respectively).

[0026] A rectangular mounting platform 5 is bolted to the middle of the frame 1. The mounting platform 5 is made of thickened steel plate. Guide rollers 6 are rotated and mounted on the outer sides of the vertical columns on both sides of the mounting platform 5. The guide rollers 6 are rubber-coated rollers. After the double-layer non-woven fabric is drawn out from the first unwinding roller 3 and the second unwinding roller 4, it passes around the guide rollers 6 on both sides to limit the vertical displacement of the fabric and ensure that the double-layer fabric is aligned vertically and transported parallel to the pressing station.

[0027] like Figure 1 , Figure 10As shown, the straightening mechanism 7 is bolted to the inner side of the left support column of the mounting platform 5 near the unwinding bracket 2. The mounting plate 701 of the straightening mechanism 7 is horizontally fixed to the side wall of the support column. A linear slide rail 702 is horizontally laid on the lower end face of the mounting plate 701, and a slide block 703 is slidably assembled on the slide rail 702. Two parallel straightening rollers 704 are vertically fixed to the top of the slide block 703. The upper and lower layers of non-woven fabric pass through the two straightening rollers 704 simultaneously. A straightening cylinder 7 is arranged horizontally below the mounting plate 701, parallel to the slide rail 702. 05. The cylinder body of the correction cylinder 705 is fixed on the bottom surface of the mounting plate 701, and the telescopic end is rigidly connected to the slide block 703 through a metal connecting block. During the operation of the equipment, when the fabric shifts laterally to the left or right, the external fabric sensor sends a signal to the controller. The controller drives the correction cylinder 705 to extend and retract, which drives the slide block 703 and the two correction rollers 704 to move left and right along the slide rail 702, correcting the lateral position of the double-layer nonwoven fabric in real time, ensuring that the fabric always enters the pressing mechanism 8 in the center, and avoiding uneven heat sealing width.

[0028] like Figures 4-9 As shown, a pressing mechanism 8 is installed in the middle of the mounting platform 5. The pressing mechanism 8 includes two side frames 801 arranged symmetrically on the left and right sides, and the two side frames 801 are vertically fixed to the top surface of the mounting platform 5. A drive component mounting shaft 808 is transversely inserted between the two side frames 801, and the drive component 807 is sleeved on the outside of the drive component mounting shaft 808 in the middle. Torsion springs 812 are sleeved on both ends of the drive component mounting shaft 808. One end of the torsion spring 812 is engaged with the end face of the drive component 807, and the other end is pressed and fixed against the inner wall of the side frame 801. The drive component 807 is a lever structure with a central protrusion. A drive rod 809 is hinged to each of the left and right ends of the drive component 807; the left drive rod 809 is hinged upward to the top plate 802, and two first connecting rods 803 are vertically fixed to the left and right ends of the top plate 802. The first connecting rods 803 penetrate vertically downward through the surface of the mounting platform 5, and the bottom end is threaded to lock the lower pressure plate assembly 14; the right drive rod 809 is hinged downward to the bottom plate 810, and two second connecting rods 806 are vertically fixed to the left and right ends of the bottom plate 810. The second connecting rods 806 penetrate vertically downward through the surface of the mounting platform 5, and the bottom end is threaded to lock the upper pressure plate assembly 13.

[0029] A drive motor 805 is bolted to the outer wall of a single-sided side frame 801. The output shaft of the drive motor 805 is horizontally connected to a cam mounting shaft 811. The cam mounting shaft 811 extends laterally through both side frames 801. An eccentric cam 804 is fixed at the middle position of the cam mounting shaft 811. When the equipment is running, the drive motor 805 continuously drives the cam mounting shaft 811 and the eccentric cam 804 to rotate at a constant speed. When the protruding end of the cam 804 rotates to fit against the lower surface of the middle part of the drive component 807, the cam 804 pushes the middle part of the drive component 807 upward, and the drive component 807 rotates around the drive component mounting shaft 808 as a fulcrum. The lever rotates; the left drive rod 809 pushes the top plate 802 and the first connecting rod 803 upward, causing the lower pressure plate assembly 14 to rise; the right drive rod 809 pushes the bottom plate 810 and the second connecting rod 806 downward, causing the upper pressure plate assembly 13 to fall downward, so that the upper pressure plate assembly 13 and the lower pressure plate assembly 14 clamp the double-layer non-woven fabric towards each other; when the cam 804 continues to rotate, after the protruding end disengages from the drive member 807, the rebound force of the torsion springs 812 at both ends causes the drive member 807 to reset, and the upper pressure plate assembly 13 and the lower pressure plate assembly 14 separate from each other, and the single heat sealing and cutting action is completed.

[0030] The lower pressure plate assembly 14 includes a lower support plate 1301 and a lower pressing plate 1302. The lower pressing plate 1302 is bolted to the top surface of the lower support plate 1301. The lower pressing plate 1302 is hollow inside, and multiple heating tubes are evenly arranged in the cavity. A pad 1303 is fixed around the outer edge of the top surface of the lower pressing plate 1302. The pad 1303 is made of high-hardness wear-resistant steel plate and is used to cooperate with the cutter assembly 1403 to complete the cutting.

[0031] like Figure 8 , Figure 9 , Figure 11 , Figure 12As shown, the upper pressure plate assembly 13 includes an upper support plate 1401 and an upper pressing plate 1402. The upper pressing plate 1402 is bolted to the bottom surface of the upper support plate 1401. The upper pressing plate 1402 is a rectangular frame structure with three closed sides and an open front end. The frame is hollow inside and multiple sets of heating tubes are arranged there. The heating tubes are all connected to the heater 15 through wires. The left and right outer walls, the closed rear outer wall, and the open front outer wall of the upper pressing plate 1402 are all welded to mounting frames 14033. Each set of mounting frames 14033 forms a closed inner cavity, in which multiple springs 14034 are vertically arranged. The top of the cutting blade 14031 has an integrally formed connecting part 14032, and the connecting part 14032 slides... The spring 14034 is inserted into the inner cavity of the mounting frame 14033. The upper end of the spring 14034 presses against the top surface of the inner cavity, and the lower end presses against the upper end of the connecting part 14032. The blade height of the cutting blade 14031 is lower than the lower heat sealing surface of the upper pressing plate 1402. When the pressure plate presses the fabric down, the cutting blade 14031 contacts the fabric first. As the upper pressing plate 1402 continues to press down to complete the heat sealing, the cutting blade 14031 contacts the pad 1303. The spring 14034 is compressed to provide stable cutting pressure. The blade of the cutting blade 14031 has a continuous semi-circular notch evenly opened. After cutting, multiple connection points are left on the side of the bag. The bag will not fall completely off the mother material belt, avoiding it from falling onto the lower pressing plate 1302 and accumulating and jamming the machine.

[0032] like Figure 4 , Figure 5 As shown, the ejector mechanism 9 is vertically installed on the top right side of the mounting platform 5 near the winding bracket 12. The ejector mechanism 9 includes a vertical drive cylinder 901. The cylinder body of the drive cylinder 901 is bolted to the mounting platform 5. The telescopic end of the drive cylinder 901 extends vertically downward through the surface of the mounting platform 5, and the bottom end is fixed with a rectangular ejector plate 902. After a single heat-sealing and cutting is completed, the winding motor 18 pulls the master material belt forward by one bag length, and the half-connected bag moves to directly below the ejector plate 902. The controller controls the drive cylinder 901 to extend downward, and the ejector plate 902 presses down on the bag connection point, completely separating the bag from the master material belt, and the bag falls freely onto the surface of the lower conveyor belt 16.

[0033] like Figure 2 As shown, drive shafts are rotatably mounted at the front and rear ends of the lower part of the frame 1. A non-slip rubber conveyor belt 16 is mounted around the two drive shafts. The left end of the conveyor belt 16 is located directly below the ejection mechanism 9, and the right end extends to the outermost side of the frame 1. A conveyor motor 17 is fixed to the rear outer wall of the frame 1. The output shaft of the conveyor motor 17 is connected to the rear drive shaft. The conveyor motor 17 drives the conveyor belt 16 to run continuously, conveying the fallen finished cloth bags to the outside of the equipment. The operator only needs to collect the cloth bags at the end of the conveyor belt and does not need to stop the machine to clean the work station in the middle.

[0034] Workflow: Feeding: The upper non-woven fabric roll is clamped in the first unwinding roller 3, and the lower non-woven fabric roll is clamped in the second unwinding roller 4. The fabric passes through the guide roller 6, the correction mechanism 7, the upper pressure plate assembly 13 and the lower pressure plate assembly 14 in sequence, and finally is wound around the first take-up roller 10 and the second take-up roller 11. Correction feeding: The winding motor 18 pulls the double-layer fabric at a constant speed, and the fabric is corrected for lateral deviation in real time by the correction mechanism 7 to ensure that the double-layer fabric is aligned and centered. Synchronous heat sealing and cutting: The drive motor 805 drives the cam 804 to rotate, driving the upper pressure plate assembly 13 and the lower pressure plate assembly 14 to clamp the fabric in opposite directions. The heater 15 heats up to complete the heat sealing of the three sides of the bag. At the same time, the cutter assembly 1403 presses down, and the cutter 14031 cuts halfway with a notch, keeping the bag connected to the master material belt. Feeding shift: Cam 804 disengages from drive component 807, torsion spring 812 resets, and upper and lower pressure plates separate; winding motor 18 pulls the material belt forward one bag position; Automatic ejection: The semi-connected cloth bag moves to the bottom of the ejection mechanism 9, and the drive cylinder 901 drives the ejection plate 902 to press down, and the cloth bag separates from the mother material belt and falls to the conveyor belt 16. Finished product conveying: The conveyor motor 17 drives the conveyor belt 16 to convey the finished fabric bags outward, and the master material belt is continuously wound up by the take-up roller to enter the next processing cycle.

[0035] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A high-precision nonwoven bag heat-sealing and bonding processing device, characterized in that, The machine includes a frame (1), with an unwinding support (2) on one side of the upper end of the frame (1). The unwinding support (2) is provided with a first unwinding roller (3) and a second unwinding roller (4). The other side of the upper end of the frame (1) is provided with a winding support (12), with a first winding roller (10) and a second winding roller (11) on the winding support (12). The upper nonwoven fabric is wound and unwound between the first unwinding roller (3) and the first winding roller (10), and the lower nonwoven fabric is wound and unwound between the second unwinding roller (4) and the second winding roller (11). The frame (1) is provided with a mounting platform (5) in the middle. The mounting platform (5) is provided with a pressing mechanism (8). The pressing mechanism (8) includes an upper pressing plate assembly (13) and a lower pressing plate assembly (14). The upper and lower non-woven fabrics pass through the upper pressing plate assembly (13) and the lower pressing plate assembly (14) in parallel. They are bonded together by the relative heat pressing of the upper pressing plate assembly (13) and the lower pressing plate assembly (14) to form a bag shape. At the same time, the non-woven bag is cut off by the cutting blade assembly (1403) on the upper pressing plate assembly (13).

2. The high-precision nonwoven bag heat-sealing and bonding processing device according to claim 1, characterized in that: The upper pressure plate assembly (13) includes an upper support plate (1401) and an upper pressing plate (1402). The upper pressing plate (1402) is fixedly installed on the lower surface of the upper support plate (1401). The upper pressing plate (1402) is a frame shape with three sides closed and one side open. The interior of the upper pressing plate (1402) is provided with a heating element (15) for heating the pressing surface of the upper pressing plate (1402). The lower pressure plate assembly (14) includes a lower support plate (1301) and a lower pressing plate (1302). The lower pressing plate (1302) is fixedly installed on the upper surface of the lower support plate (1301), and the shape of the lower pressing plate (1302) matches that of the upper pressing plate (1402). It is also provided with a heating element (15) inside, which is used to heat the pressing surface of the lower pressing plate (1302).

3. The high-precision nonwoven bag heat-sealing and bonding processing device according to claim 2, characterized in that: The upper pressing plate (1402) is provided with a cutter assembly (1403) on the lower part of its three outer walls and one open side, and a pad (1303) matching the cutter assembly (1403) is provided on the outer side of the lower pressing plate (1302).

4. The high-precision nonwoven bag heat-sealing and bonding processing device according to claim 3, characterized in that: The cutting blade assembly (1403) includes a cutting blade (14031) and a mounting frame (14033). The mounting frame (14033) is fixedly mounted on the outer wall of the upper pressing plate (1402). The mounting frame (14033) has an inner cavity. The upper end of the cutting blade (14031) is provided with a connecting part (14032). The connecting part (14032) is movably inserted into the inner cavity of the mounting frame (14033). The inner cavity of the mounting frame (14033) is provided with multiple springs (14034). The two ends of the springs (14034) abut against the upper end of the connecting part (14032) and the top of the inner cavity, respectively. The cutting edge of the cutting blade (14031) is lower than the lower end face of the upper pressing plate (1402).

5. A high-precision nonwoven bag heat-sealing and bonding processing device according to any one of claims 1-4, characterized in that: The pressing mechanism (8) includes side frames (801) symmetrically arranged on the mounting platform (5). A driving member (807) is provided between the two side frames (801). The middle part of the driving member (807) is rotatably connected to the side frame through a driving member mounting shaft (808). Both ends of the driving member mounting shaft (808) are fitted with torsion springs (812). One end of the torsion spring (812) is connected to the end of the driving member mounting shaft (808), and the other end is connected to the side frame (801). Both ends of the driving component (807) are rotatably connected to driving rods (809). The movable end of one driving rod (809) is rotatably connected to a top plate (802). The two ends of the top plate (802) are fixedly connected to a first connecting rod (803). The lower end of the first connecting rod (803) extends downward through the mounting platform (5) and connects to the lower support plate (1301). The movable end of the other driving rod (809) is rotatably connected to a bottom plate (810). Both ends of the bottom plate (810) are connected to a second connecting rod (806). The lower end of the second connecting rod (806) extends downward through the mounting platform (5) and connects to the upper support plate (1401). A drive motor (805) is provided on the outer side of the side frame (801). The output end of the drive motor (805) is connected to the cam mounting shaft (811). The two ends of the cam mounting shaft (811) are rotatably connected to the side frames (801) on both sides. A cam (804) is provided in the middle of the cam mounting shaft (811). When the drive motor (805) works, it drives the cam (804) to rotate. The cam (804) will squeeze one end of the drive member (807), causing the drive member (807) to swing back and forth.

6. The high-precision nonwoven bag heat-sealing and bonding processing device according to claim 1, characterized in that: The two sides of the mounting platform (5) are provided with guide rollers (6) that rotate around the outside of the support columns. The non-woven fabric on the unwinding roller is wound onto the winding roller by the guide rollers (6).

7. The high-precision nonwoven bag heat-sealing and bonding processing device according to claim 5, characterized in that: The mounting platform (5) has a correction mechanism (7) on the inner side of the support column near the unwinding bracket (2). The correction mechanism (7) includes a mounting plate (701), which is fixedly connected to the support column. The lower end face of the mounting plate (701) is provided with a slide rail (702). The slide rail (702) is provided with a sliding seat (703). The two ends of the sliding seat (703) are vertically provided with correction rollers (704). The lower end face of the mounting plate (701) is also provided with a correction cylinder (705). The correction cylinder (705) is parallel to the slide rail (702), and the telescopic end of the correction cylinder (705) is fixedly connected to the sliding seat (703) through a connecting block.

8. The high-precision nonwoven bag heat-sealing and bonding processing device according to claim 4, characterized in that: The cutting blade (14031) has notches that are evenly distributed in a straight line, so that after the cutting blade (14031) cuts the non-woven fabric, the non-woven bag and the non-woven fabric are not completely separated.

9. The high-precision nonwoven bag heat-sealing and bonding processing device according to claim 1, characterized in that: The upper surface of the mounting platform (5) is provided with an ejection mechanism (9) at one end near the winding bracket (12). The ejection mechanism (9) includes a drive cylinder (901). The drive cylinder (901) is installed at the upper end of the mounting platform (5). The telescopic end of the drive cylinder (901) extends downward through the mounting platform (5) and is connected to the ejection plate (902).

10. A high-precision nonwoven bag heat-sealing and bonding processing device according to claim 9, characterized in that: The upper part of the frame (1) is also provided with a conveyor belt (16). The two ends of the conveyor belt (16) are installed on the inner wall of the frame (1) through the drive shaft. One end of the conveyor belt (16) is located below the top plate (902), and the other end extends to the end of the frame (1) near the winding bracket (12). A conveyor motor (17) is provided on the rear side of the frame (1). The output end of the conveyor motor (17) is connected to one of the drive shafts of the conveyor belt (16).

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