Non-woven fabric bottom plate machine with automatic positioning function

Abstract

The invention discloses an automatic positioning non-woven fabric bottom plate machine which comprises a frame, and an ultrasonic sewing machine used for sewing two pieces of non-woven fabric together is arranged in the middle of the right side of the frame. A cutting assembly used for cutting the sewn non-woven fabric is arranged at the position, corresponding to the discharging end of the ultrasonic sewing machine, of the right side of the frame, and an aligning assembly used for aligning the edges of the upper non-woven fabric and the lower non-woven fabric is arranged at the position, located at the feeding end of the ultrasonic sewing machine, in the frame. Through the arrangement of the aligning assembly, when the edge of the non-woven fabric is located in the limiting groove, deviation of the non-woven fabric in the horizontal direction can be effectively prevented, it is guaranteed that the edges of the upper non-woven fabric and the lower non-woven fabric are accurately aligned in the horizontal position before ultrasonic sewing, and therefore it is guaranteed that sewing lines are straight and uniform, and the appearance quality of products is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic positioning non-woven fabric bottom board machines, and particularly to an automatic positioning non-woven fabric bottom board machine. Background Art

[0002] Non-woven fabric, also known as non-woven cloth, is composed of oriented or random fibers and is called cloth because of its appearance and certain properties. Non-woven fabric has the characteristics of moisture-proof, breathable, flexible, light in weight, non-flammable, easy to decompose, non-toxic and non-irritating, rich in colors, low in price, recyclable, etc. It is mostly produced by a continuous one-step method of high-temperature melting, spinning, laying, and hot-pressing coiling using polypropylene pellets as raw materials.

[0003] Currently, Chinese Patent No. CN221660143U discloses a double-layer non-woven fabric ultrasonic sewing and cutting integrated machine, including a base. The top surface of the base is provided with an ultrasonic sewing body, and the bottom surface of the ultrasonic sewing body is fixedly connected to the top surface of the base. The top surface of the base is provided with a support frame, and the bottom surface of the support frame is fixedly connected to the top surface of the base. The top surface of the support frame is provided with a limiting mechanism and a cutting mechanism. The limiting mechanism includes a fixing part and a limiting part, and the limiting part is located on the inner side of the fixing part. The cutting mechanism includes a driving part and a cutting part, and the cutting part is located on the inner side of the driving part. Through the limiting mechanism, by using the first motor in the limiting part, the first motor drives the worm, so that the first gear and the second gear rotate, so that the threaded rod drives the lifting plate and the upper limiting plate to lift, so as to limit it and prevent shaking during the processing, thereby improving work efficiency.

[0004] The above double-layer non-woven fabric ultrasonic sewing and cutting integrated machine still has some problems in use. Although it can be limited to prevent shaking during processing, thereby improving work efficiency, however, during the movement of the non-woven fabric, the upper and lower groups of non-woven fabrics are very likely to be misaligned, which will affect the appearance quality of the product after sewing. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic positioning non-woven fabric bottom board machine to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] An automatic positioning non-woven fabric bottom board machine, comprising a frame. In the middle of the right side of the frame, there is an ultrasonic sewing machine for sewing two pieces of non-woven fabric together. At the right side of the frame and corresponding to the discharge end of the ultrasonic sewing machine, there is a cutting component for cutting the sewn non-woven fabric. Inside the frame and at the feeding end of the ultrasonic sewing machine, there is an alignment component for aligning the edges of the upper and lower non-woven fabrics.

[0008] The alignment component includes support columns arranged inside both sides of the frame. At the opposite ends of the two groups of support columns, there are limit blocks respectively. Inside the two groups of support columns, there is an adjustment component for adjusting the distance between the two limit blocks according to the width of the non-woven fabric. On the opposite sides of the two limit blocks, there are limit grooves for restricting the edges of the non-woven fabric. At the lower part of the opposite sides of the two limit blocks, there are circular grooves respectively. Inside the top of the circular groove, there is a first roller connected by a detachable connecting piece. One end of each of the two first rollers extends into the corresponding limit groove and contacts the edge of the non-woven fabric. Inside the cavity of each of the two limit grooves, there is a limit component for preventing the edge of the corresponding side of the non-woven fabric from warping.

[0009] As a preferred technical solution, the limit component includes mounting plates respectively arranged inside the cavities of the two limit grooves. On the surfaces of the two mounting plates, there are several groups of second rollers rollingly connected. Inside the cavities of the two limit grooves, there is a pushing component for pushing the mounting plate on the corresponding side downward so as to drive the second roller to press against the edge of the non-woven fabric.

[0010] As a preferred technical solution, the pushing component includes springs respectively arranged at the tops of the left and right sides of the mounting plate. At the top of each mounting plate and inside the cavity of the spring, there is a screw rod fixedly connected. At the top of each limit block and at the corresponding position of each screw rod, there is a circular hole. The end of each screw rod penetrates upward through the corresponding circular hole and is threadedly connected with a first nut.

[0011] As a preferred technical solution, the adjustment component includes a bidirectional lead screw rotatably connected between the two groups of support columns. The two ends of the bidirectional lead screw are respectively threadedly connected with nut seats. The two nut seats are respectively fixedly installed at the tops of the corresponding limit blocks. One end of the bidirectional lead screw rotatably penetrates through one of the support columns and is fixedly connected with a hand wheel. On the surface of the other support column, there is a fixing piece for fixing the bidirectional lead screw.

[0012] As a preferred technical solution, the fixing piece includes a fixed ring fixedly connected to the surface of the other support column. The end of the bidirectional lead screw extends into the cavity of the fixed ring. The surface of the fixed ring is threadedly connected with a fixing bolt. The end of the fixing bolt threadedly penetrates through the fixed ring and abuts against the outer cylindrical surface of the end of the bidirectional lead screw.

[0013] As a preferred technical solution, the detachable connecting member includes a nut fixedly installed at the top of the circular groove, and an external thread for threaded connection with the inner cavity of the nut is provided on the outer circumferential surface of the top wheel shaft of the first roller.

[0014] As a preferred technical solution, the cutting component includes a support plate fixedly installed at the right end of the frame, a U-shaped frame is fixedly installed on the top of the support plate, an electric push rod is fixedly installed on the top of the U-shaped frame, the telescopic end of the electric push rod extends downward into the inner cavity of the U-shaped frame and is fixedly connected with a cutting knife, and a protective shell for covering the U-shaped frame is arranged on the top of the support plate.

[0015] As a preferred technical solution, a display screen and a tension controller are installed on the front side of the frame. The signal output end of the tension controller is electrically connected to the signal input end of the display screen through a wire. Optical tension sensors are fixedly installed on the upper and lower parts of the opposite sides of the two limit blocks. The detection ends of the two optical tension sensors on the same side are arranged vertically opposite to each other.

[0016] As a preferred technical solution, a tension feedback control module is arranged on the rear side of the frame. The input end of the tension feedback control module is electrically connected to the signal output ends of the two optical tension sensors through a wire, and the output end of the tension feedback control module is electrically connected to the tension controller;

[0017] The tension feedback control module includes:

[0018] A microprocessor unit: for receiving the detection data of the optical tension sensor in real time, calculating the difference between the upper and lower non-woven fabric tensions, and generating an adjustment instruction according to a preset threshold;

[0019] A drive circuit: controlling the stitching speed of the ultrasonic stitching machine or the rotation angle of the bidirectional lead screw in the adjustment component according to the adjustment instruction to dynamically adjust the distance between the limit blocks and keep the edges of the non-woven fabric aligned and the tension balanced;

[0020] An alarm unit: when the tension difference exceeds the preset threshold, triggering an audible and visual alarm and displaying the abnormal position through the display screen.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. Through the setting of the alignment component, when the edge of the non-woven fabric is located in the limiting groove, its horizontal offset can be effectively prevented, ensuring that the edges of the upper and lower non-woven fabrics are precisely aligned horizontally before ultrasonic stitching. This guarantees that the stitching line is straight and uniform, improving the appearance quality of the product. At the same time, the first roller on the limiting block can not only reduce the friction during the transmission of the non-woven fabric but also play a precise guiding role for its edge. The contact point between the roller and the edge of the non-woven fabric is stable, and during the movement of the non-woven fabric, its minute deviation can be corrected in real time.

[0023] 2. Through the setting of the adjustment component, the distance between the two groups of limiting blocks can be precisely adjusted to adapt to non-woven fabrics of different widths. Turning the handwheel can achieve the movement of the limiting blocks, which is convenient and fast to operate.

[0024] 3. Through the setting of the fixing part, by tightening the fixing bolt, the end of the bidirectional lead screw can be fixed in the fixing ring, preventing the bidirectional lead screw from rotating during operation and ensuring the stability and reliability of the adjustment component. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the automatic positioning non-woven fabric bottom plate machine of the present invention;

[0026] Figure 2 is a schematic structural diagram of the cutting component of the present invention;

[0027] Figure 3 is a schematic structural diagram of the bidirectional lead screw of the present invention;

[0028] Figure 4 is a schematic structural diagram of the limiting block of the present invention;

[0029] Figure 5 is a schematic structural diagram of the limiting block from another perspective of the present invention.

[0030] In the figure:

[0031] 100, frame; 101, ultrasonic stitching machine; 102, non-woven fabric roll; 103, electric roller;

[0032] 200, display screen; 201, tension controller; 202, optical tension sensor;

[0033] 300, support column; 301, limiting block; 302, nut seat; 303, bidirectional lead screw; 304, handwheel; 305, fixing ring; 306, fixing bolt; 307, limiting groove; 308, nut; 309, circular groove; 310, first roller; 311, external thread;

[0034] 400, protective shell; 401, electric push rod; 402, U-shaped frame; 403, cutter; 404, support plate;

[0035] 500. Mounting plate; 501. Spring; 502. First nut; 503. Round hole; 504. Second roller; 505. Screw rod. Detailed implementation manner

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1-5 , this embodiment provides a non-woven fabric bottom board machine with automatic positioning, including a frame 100. In the middle of the right side of the frame 100, there is an ultrasonic sewing machine 101 for sewing two pieces of non-woven fabric together. At a position corresponding to the discharge end of the ultrasonic sewing machine 101 on the right side of the frame 100, there is a cutting component for cutting the sewn non-woven fabric. Inside the frame 100 and at the feeding end of the ultrasonic sewing machine 101, there is an alignment component for aligning the edges of the upper and lower non-woven fabrics.

[0038] Among them, the alignment component includes support columns 300 arranged inside both sides of the frame 100. At opposite ends of the two groups of support columns 300, there are limit blocks 301. Inside the two groups of support columns 300, there is an adjustment component for adjusting the distance between the two groups of limit blocks 301 according to the width of the non-woven fabric. On the opposite sides of the two groups of limit blocks 301, there are limit grooves 307 for restricting the edges of the non-woven fabric. At the lower part of the opposite sides of the two groups of limit blocks 301, there are circular grooves 309. Inside the top of the circular groove 309, a first roller 310 is connected through a detachable connection. One ends of the two groups of first rollers 310 respectively extend into the corresponding limit grooves 307 and contact the edges of the non-woven fabric. Inside the inner cavities of the two groups of limit grooves 307, there are limit components for preventing the edges of the corresponding sides of the non-woven fabric from warping. Through the setting of the alignment component, when the edge of the non-woven fabric is located in the limit groove 307, its horizontal deviation can be effectively prevented, ensuring that the edges of the upper and lower non-woven fabrics are precisely aligned horizontally before ultrasonic sewing, thereby ensuring that the sewing line is straight and uniform, improving the appearance quality of the product. At the same time, the first rollers 310 on the limit blocks 301 can not only reduce the friction during the transmission of the non-woven fabric, but also play an accurate guiding role for its edges. The contact points between the rollers and the edges of the non-woven fabric are stable, and during the movement of the non-woven fabric, its minute deviations can be corrected in real time.

[0039] Among them, the ultrasonic sewing machine 101 is a well-known technical means to those skilled in the art. For its specific structure and working principle, please refer to the ultrasonic sewing body in a double-layer non-woven fabric ultrasonic sewing and cutting integrated machine with the publication number of CN221660143U.

[0040] Among them, non-woven fabric rollers 102 are arranged at the left side and the lower part of the right side of the frame 100. Inside the frame 100, there are carrier rollers for guiding two groups of non-woven fabrics. The non-woven fabrics on the surfaces of the two groups of non-woven fabric rollers 102 respectively enter between the two groups of support columns 300 through the guiding of the corresponding carrier rollers. And inside the frame 100 and at the discharging end of the ultrasonic sewing machine 101, there are two groups of electric rollers 103 arranged vertically. The two groups of non-woven fabrics pass through between the two groups of electric rollers 103, and the two groups of electric rollers 103 are respectively pressed against the surfaces of the two groups of non-woven fabrics, and can move the aligned non-woven fabrics forward simultaneously.

[0041] Among them, the limiting component includes mounting plates 500 respectively arranged in the inner cavities of the two groups of limiting grooves 307. A number of second rollers 504 are rotatably connected to the surfaces of the two groups of mounting plates 500. In the inner cavities of the two groups of limiting grooves 307, there are respectively pushing components for pushing the corresponding side mounting plates 500 downward to drive the second rollers 504 to press against the edges of the non-woven fabrics. Through the setting of the limiting component, the second rollers 504 can roll above the edges of the non-woven fabrics, further preventing the edges of the non-woven fabrics from warping, and at the same time reducing the friction between the non-woven fabrics and the limiting blocks.

[0042] Among them, the pushing component includes springs 501 respectively arranged at the tops of the left and right sides of the mounting plate 500. At the top of each mounting plate 500 and inside the cavity of each spring 501, a screw rod 505 is fixedly connected. At the top of each limiting block 301 and at the corresponding position of each screw rod 505, a circular hole is opened. The end of each screw rod 505 penetrates upward through the circular hole 503 at the corresponding position and is threadedly connected with a first nut 502. Through the setting of the pushing component, rotating the first nut 502 can conveniently adjust the compression degree of the spring 501, so as to accurately control the pressure of the second roller 504 on the edge of the non-woven fabric, and can ensure that the edge of the non-woven fabric can be stably flattened and prevented from warping under different production conditions, which is beneficial to improving the quality of non-woven fabric sewing.

[0043] Among them, the adjusting component includes a bidirectional lead screw 303 rotatably connected between two sets of support columns 300. Nut seats 302 are respectively threadedly connected to both ends of the bidirectional lead screw 303. The two sets of nut seats 302 are respectively fixedly installed on the tops of the corresponding side limiting blocks. One end of the bidirectional lead screw 303 rotatably penetrates through one set of support columns 300 and is fixedly connected to a handwheel 304. A fixing member for fixing the bidirectional lead screw 303 is arranged on the surface of the other set of support columns 300. Through the setting of the adjusting component, the distance between the two limiting blocks 301 can be accurately adjusted to adapt to non-woven fabrics of different widths. Rotating the handwheel 304 can realize the movement of the limiting blocks 301, and the operation is convenient and fast.

[0044] Among them, the fixing member includes a fixing ring 305 fixedly connected to the surface of the other set of support columns 300. The end of the bidirectional lead screw 303 extends into the inner cavity of the fixing ring 305. A fixing bolt 306 is threadedly connected to the surface of the fixing ring 305. The end of the fixing bolt 306 threadedly penetrates through the fixing ring 305 and abuts against the outer circular surface of the end of the bidirectional lead screw 303. Through the setting of the fixing member, by tightening the fixing bolt 306, the end of the bidirectional lead screw 303 can be fixed in the fixing ring 305, preventing the bidirectional lead screw 303 from rotating during operation, and ensuring the stability and reliability of the adjusting component.

[0045] Among them, the detachable connecting member includes a nut 308 fixedly installed on the top of the circular groove 309. An external thread 311 for threadedly connecting the inner cavity of the nut 308 is arranged on the outer circular surface of the top wheel shaft of the first roller 310. Through the setting of the detachable connecting member, the installation and disassembly of the first roller 310 are facilitated. When the first roller 310 is worn or damaged, it can be replaced in time, reducing the maintenance cost of the equipment.

[0046] Among them, the cutting component includes a support plate 404 fixedly installed at the right end of the frame 100. A U-shaped frame 402 is fixedly installed on the top of the support plate 404. An electric push rod 401 is fixedly installed on the top of the U-shaped frame 402. The telescopic end of the electric push rod 401 extends downward into the inner cavity of the U-shaped frame 402 and is fixedly connected to a cutting knife 403. A protective shell 400 for covering the U-shaped frame 402 is arranged on the top of the support plate 404. Through the setting of the cutting component, the electric push rod 401 can accurately control the up and down movement of the cutting knife 403 to realize the accurate cutting of the non-woven fabric. At the same time, the protective shell 400 can prevent the operator from accidentally touching the cutting knife 403, ensuring production safety.

[0047] Among them, a display screen 200 and a tension controller 201 are installed on the front side of the frame 100. The signal output end of the tension controller 201 is electrically connected to the signal input end of the display screen 200 through a wire. On the upper and lower parts of the opposite sides of the two groups of limit blocks 301, optical tension sensors 202 are fixedly installed. The detection ends of the two groups of optical tension sensors 202 on the same side are arranged vertically opposite to each other. Through the setting of the optical sensors, the optical tension sensors 202 can accurately detect the tension of the non-woven fabric and transmit the signals to the tension controller 201 and the display screen 200. Furthermore, the operator can adjust the tension of the non-woven fabric in a timely manner according to the data on the display screen 200 to ensure that the non-woven fabric maintains an appropriate tension during the stitching process and avoid stitching quality problems caused by excessive or too small tension.

[0048] Among them, the specific model of the optical tension sensor 202 can be the Swiss FMS LMGZ series, and the model of the tension controller 201 can be the CH-SYS series.

[0049] Among them, a tension feedback control module 203 is arranged on the rear side of the frame 100. The input end of the tension feedback control module 203 is electrically connected to the signal output ends of the two groups of optical tension sensors 202 through a wire, and the output end of the tension feedback control module 203 is electrically connected to the tension controller 201;

[0050] The tension feedback control module 203 includes:

[0051] A microprocessor unit: used to receive the detection data of the optical tension sensor 202 in real time, calculate the difference in the tension of the upper and lower non-woven fabrics, and generate an adjustment instruction according to a preset threshold;

[0052] A drive circuit: controls the stitching speed of the ultrasonic stitching machine 101 or adjusts the rotation angle of the lead screw 303 in the adjustment assembly according to the adjustment instruction to dynamically adjust the distance between the limit blocks 301 and keep the edges of the non-woven fabric aligned and the tension balanced;

[0053] An alarm unit: when the tension difference exceeds the preset threshold, triggers an audible and visual alarm and displays the abnormal position through the display screen 200.

[0054] Technical effect: Through the closed-loop control of the optical tension sensor 202 and the tension feedback control module 203, the real-time monitoring and adaptive adjustment of the tension during the non-woven fabric stitching process are realized, avoiding stitching deviation or material wrinkles caused by uneven tension, improving the yield of finished products, linking the tension detection with mechanical adjustment (distance between limit blocks) and stitching speed control, realizing full-automatic dynamic compensation, accurately positioning the abnormal tension area through difference calculation and threshold judgment, and reducing manual intervention.

[0055] Working principle;

[0056] First, two sets of non-woven fabrics are sequentially drawn out from the corresponding fabric rollers, guided by the corresponding idler rollers on the corresponding sides, arranged vertically, and sequentially passed through the ultrasonic sewing machine 101 between the two sets of support columns 300, and passed out through the gap between the two electric rollers 103 and enter the cutting component;

[0057] Subsequently, rotate the bidirectional lead screw 303, driving the two nut blocks 302 to move towards or away from each other along the bidirectional lead screw 303, thereby driving the limit blocks 301 fixed on the nut blocks 302 to move, achieving the purpose of adjusting the distance between the two limit blocks 301 according to the width of the non-woven fabric, so that the two side edges of the non-woven fabric are respectively located in the limiting grooves 307. At the same time, contact the first roller 310 to contact the edges of the upper and lower non-woven fabrics. At the same time, the first roller 310 on the limit block 301 can play a role of rolling support when the non-woven fabric moves, reducing the friction between the non-woven fabric and the limit block 301, enabling the non-woven fabric to pass through more smoothly, and the first roller 310 contacts the edge of the non-woven fabric to further limit the edge of the non-woven fabric to prevent it from shifting left and right;

[0058] Immediately afterwards, simultaneously loosen the two first nuts 502 on the same side, thereby adjusting the compression degree of the spring 501, pushing down the mounting plate 500, so that the second roller 504 at the bottom of the mounting plate 500 contacts the edge of the non-woven fabric, preventing the edge of the non-woven fabric from warping, ensuring that the non-woven fabric remains flat during movement, and facilitating subsequent sewing operations;

[0059] At the same time, the optical tension sensors 202 on the upper and lower parts of the opposite sides of the two limit blocks are used to detect the tension of the non-woven fabric during alignment. The optical tension sensors 202 detect the pressure or stretching degree of the non-woven fabric on their detection ends, transmit relevant signals to the tension controller 201, and the tension controller 201 then processes the signals and transmits them to the display screen 200 for display. The operator can adjust the tension of the non-woven fabric in a timely manner according to the tension data displayed on the display screen 200;

[0060] In addition, automatic dynamic adjustment can also be performed. The optical tension sensors 202 monitor the tension of the upper and lower non-woven fabrics in real time, and the data is transmitted to the tension controller 201 and the display screen 200. The tension feedback control module 203 is based on the tension difference:

[0061] Dynamic adjustment: Control the speed of the ultrasonic sewing machine 101 or finely adjust the distance between the limit blocks by the bidirectional lead screw 303 to maintain the tension balance.

[0062] Abnormal alarm: Trigger an audible and visual alarm when the tension exceeds the threshold value, and mark the abnormal area on the display screen.

[0063] Subsequently, two sets of electric rollers 103 are started to pump the two aligned non-woven fabrics into the ultrasonic sewing machine 101, and the ultrasonic sewing machine 101 sews the upper and lower non-woven fabrics that have been preliminarily processed by the alignment component;

[0064] Furthermore, the stitched non-woven fabric is drawn out from the discharging end of the ultrasonic stitching machine 101 and fed into the cutting assembly through two sets of electric rollers 103. Then, the electric push rod 401 is controlled to push the cutter 403 downward to cut the non-woven fabric, thereby obtaining a non-woven fabric product of a desired length or shape.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatically positioned non-woven fabric baseboard machine, characterized in that, It includes a frame (100). An ultrasonic sewing machine (101) for sewing two pieces of non-woven fabric together is provided in the middle of the right side of the frame (100). A cutting component for cutting the sewn non-woven fabric is provided at a position on the right side of the frame (100) corresponding to the discharge end of the ultrasonic sewing machine (101). An alignment component for aligning the edges of the upper and lower non-woven fabrics is provided inside the frame (100) and at the feeding end of the ultrasonic sewing machine (101).

2. The automatic positioning non-woven fabric bottom board machine according to claim 1, wherein: The alignment component includes support columns (300) provided inside both sides of the frame (100). Limit blocks (301) are provided at the opposite ends of the two groups of support columns (300). An adjustment component for adjusting the distance between the two limit blocks (301) according to the width of the non-woven fabric is provided inside the two groups of support columns (300). Limit grooves (307) for restricting the edges of the non-woven fabric are respectively opened on the opposite sides of the two limit blocks (301). Circular grooves (309) are respectively opened at the lower parts of the opposite sides of the two limit blocks (301). A first roller (310) is connected to the top inside of the circular groove (309) through a detachable connection member. One ends of the two first rollers (310) respectively extend into the corresponding limit grooves (307) and contact the edges of the non-woven fabric. Limit components for preventing the edges of the corresponding sides of the non-woven fabric from warping are respectively provided in the inner cavities of the two limit grooves (307).

3. The automatic positioning non-woven fabric baseboard machine according to claim 2, wherein: The limit component includes mounting plates (500) respectively provided in the inner cavities of the two limit grooves (307). A number of second rollers (504) are rotatably connected to the surfaces of the two mounting plates (500). Pushing components for pushing the corresponding mounting plates (500) downward to drive the second rollers (504) to press against the edges of the non-woven fabric are respectively provided in the inner cavities of the two limit grooves (307).

4. The automatic positioning non-woven fabric bottom board machine according to claim 3, wherein: The pushing component includes springs (501) respectively provided at the tops of the left and right sides of the mounting plate (500). A screw rod (505) is fixedly connected to the top of each mounting plate (500) and inside the cavity of the spring (501). Circular holes (503) are respectively opened at the tops of the two limit blocks (301) and at positions corresponding to each screw rod (505). The end of each screw rod (505) penetrates upward through the corresponding circular hole (503) and is threadedly connected with a first nut (502).

5. The automatic positioning non-woven fabric baseboard machine according to claim 4, wherein: The adjustment component includes a bidirectional lead screw (303) rotatably connected between the two groups of support columns (300). Nut seats (302) are respectively threadedly connected to both ends of the bidirectional lead screw (303). The two nut seats (302) are respectively fixedly installed at the tops of the corresponding limit blocks (301). One end of the bidirectional lead screw (303) rotatably penetrates through one of the support columns (300) and is fixedly connected with a hand wheel (304). A fixing member for fixing the bidirectional lead screw (303) is provided on the surface of the other support column (300).

6. An automatic positioning non-woven fabric baseboard machine according to claim 5, characterized in that: The fixing member includes a fixing ring (305) fixedly connected to the surface of the other group of the support columns (300). The end of the bidirectional lead screw (303) extends into the inner cavity of the fixing ring (305). A fixing bolt (306) is threadedly connected to the surface of the fixing ring (305). The end of the fixing bolt (306) threadedly penetrates the fixing ring (305) and abuts against the outer cylindrical surface of the end of the bidirectional lead screw (303).

7. An automatic positioning non-woven fabric baseboard machine according to claim 6, characterized in that: The detachable connecting member includes a nut (308) fixedly installed at the top of the circular groove (309). An external thread (311) for threadedly connecting to the inner cavity of the nut (308) is provided on the outer cylindrical surface of the top wheel shaft of the first roller (310).

8. An automatically positioning non-woven fabric baseboard machine according to claim 7, characterized in that: The material cutting assembly includes a support plate (404) fixedly installed at the right end of the frame (100). A U-shaped frame (402) is fixedly installed at the top of the support plate (404). An electric push rod (401) is fixedly installed at the top of the U-shaped frame (402). The telescopic end of the electric push rod (401) extends downward into the inner cavity of the U-shaped frame (402) and is fixedly connected to a cutting knife (403). A protective shell (400) for covering the U-shaped frame (402) is provided at the top of the support plate (404).

9. The automatic positioning non-woven fabric baseboard machine according to claim 8, wherein: A display screen (200) and a tension controller (201) are installed on the front side of the frame (100). The signal output end of the tension controller (201) is electrically connected to the signal input end of the display screen (200) through a wire. Optical tension sensors (202) are fixedly installed on the upper and lower parts of the opposite sides of the two groups of limit blocks (301). The detection ends of the two groups of optical tension sensors (202) on the same side are arranged vertically opposite to each other.

10. The automatic positioning non-woven fabric baseboard machine according to claim 9, characterized in that: A tension feedback control module (203) is provided at the rear side of the frame (100). The input end of the tension feedback control module (203) is electrically connected to the signal output ends of the two groups of optical tension sensors (202) through a wire. The output end of the tension feedback control module (203) is electrically connected to the tension controller (201); The tension feedback control module (203) includes: A microprocessor unit: for receiving the detection data of the optical tension sensor (202) in real time, calculating the difference between the upper and lower non-woven fabric tensions, and generating an adjustment instruction according to a preset threshold; A drive circuit: controlling the stitching speed of the ultrasonic stitching machine (101) or the rotation angle of the bidirectional lead screw (303) in the adjustment assembly according to the adjustment instruction to dynamically adjust the distance between the limit blocks (301) and keep the non-woven fabric edges aligned and the tension balanced; An alarm unit: when the tension difference exceeds the preset threshold, triggering an audible and visual alarm and displaying the abnormal position through the display screen (200).

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