A stretching and forming apparatus and its forming method for manufacturing spandex filaments

Abstract

This invention belongs to the field of spandex filament production technology and discloses a spandex filament manufacturing stretching and forming device and its forming method. The device includes a frame with transverse guide rails installed on both the front and rear sides. A longitudinal guide rail is fixedly installed at the center of the bottom of each of the two transverse guide rails. A threading hole is opened in the center of the left side of the frame, and a thread outlet hole is opened in the center of the right side of the frame. This invention utilizes high-pressure airflow as power to bring two movable tubes closer together, thereby fixing the fiber. When the air is released, the two movable tubes automatically reset, allowing the fiber to be removed. The entire process only requires controlling the opening and closing of valves, eliminating the need for manual knotting and disassembly. This effectively simplifies the fixing and unfixing process and promotes improved overall stretching and forming efficiency.

Description

Technical Field

[0001] This invention belongs to the field of spandex filament production technology, specifically a spandex filament manufacturing stretching and forming device and its forming method. Background Technology

[0002] Spandex filament is a synthetic fiber, also known as polyurethane elastic fiber. It is made from polyurethane polymers and possesses excellent elasticity and tensile properties. Spandex filament has extremely high elasticity and recovery properties, quickly returning to its original shape after stretching and is not easily deformed or loosened. This makes spandex filament ideal for products requiring a tight fit, close-fitting design, and stretch. The production process of spandex filament involves a stretching process to enhance its elasticity; stretching equipment is used during this process to stretch and shape the spandex filament.

[0003] Conventional spandex filament manufacturing stretching and forming equipment mainly applies tension to the spandex filament to complete the stretching process. During the stretching process, the spandex filament needs to be kept taut throughout the entire processing, which requires fixing it to the guide roller. In existing technology, knotting is generally used to fix the spandex filament to the guide roller. This fixing method requires manual operation, and the knots need to be untied when removing the spandex filament. The entire fixing and unfixing process is relatively cumbersome and can easily affect the efficiency of the overall stretching and forming.

[0004] In the processing of spandex filaments, when it is necessary to change the length and thickness of the spandex filaments, tension rollers are generally used to adjust the tension of the spandex filaments, thereby adjusting the performance. In the existing technology, multiple tension rollers are generally used to adjust the tension of the spandex filaments, that is, the tension is adjusted by adjusting the distance between two tension rollers. In the process of adjustment, the relative position of the tension rollers needs to be precisely controlled. At the same time, the device needs to be stopped to adjust the tension. It is not possible to directly adjust the tension during the operation. The adjustment method needs to be improved. Summary of the Invention

[0005] The purpose of this invention is to provide a spandex filament manufacturing stretching and forming apparatus and a forming method thereof, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a spandex filament manufacturing and stretching forming device, comprising a frame, with transverse guide rails installed on both the front and rear sides of the frame, and longitudinal guide rails fixedly installed at the center of the bottom ends of both transverse guide rails; a threading hole is provided at the center of the left side of the frame, and a thread outlet hole is provided at the center of the right side of the frame; fiber fixing components are symmetrically arranged on the left and right sides of both transverse guide rails, and the fiber fixing components are movably engaged with the transverse guide rails, allowing the fiber fixing components to shift left and right relative to the transverse guide rails; a tension roller is provided at the bottom end between the two fiber fixing components, and the tension roller is always positioned... At the midpoint between the two fiber fixing components, a fiber thread is provided inside the frame. One end of the fiber thread passes through the threading hole and is wound sequentially around the outer side of the left fiber fixing component, the outer side of the tension roller, and the outer side of the right fiber fixing component, and exits through the thread outlet hole. A second air storage pipe is provided above the tension roller, and a four-way valve is provided above the second air storage pipe. The bottom end of the four-way valve is connected to the top end of the second air storage pipe. Three-way valves are fixedly connected to both ends of the four-way valve, and air supply pipes are fixedly connected to both ends of the three-way valve. The other end of the air supply pipe is connected to the fiber fixing component.

[0007] Before the device is put into operation, the external air source must first be connected to the four-way valve, and the device must be hoisted using an external frame. At the same time, the winding device is placed at the right end of the device. Then, the corresponding fiber thread is first passed through the threading hole and wound around the outer side of the fiber fixing component on the left, then wound around the outer side of the tension roller, and then wound around the outer side of the fiber fixing component on the right. Finally, it is passed through the thread outlet hole and connected to the external winding device. The winding device keeps the fiber thread in a taut state, and the fiber thread is always in a "U" shape during the entire stretching and forming process.

[0008] As a further technical solution of the present invention, the fiber fixing assembly includes a fixing tube, and a first mounting shaft is fixedly installed at the middle of both the front and rear ends of the fixing tube. A transverse guide block is fixedly sleeved on the outer side of the first mounting shaft. The transverse guide block is movably engaged with the transverse guide rail. The fixing tube moves left and right relative to the transverse guide rail through the transverse guide block.

[0009] As a further technical solution of the present invention, the outer side of the fixed tube is provided with slots at equal angles near the front and rear ends, and the front and rear ends of the outer side of the fixed tube are provided with movable tubes. The two movable tubes are provided with anti-slip grooves at their relatively close ends, and the inner diameter of the movable tube is the same as the diameter of the fixed tube.

[0010] As a further technical solution of the present invention, a support frame is fixedly installed in the middle of the inner side of the movable tube, the movable tube is movably connected to the slot through the support frame, the movable tube moves back and forth relative to the slot, and a first gas storage tube is provided at both the front and rear ends of the inner side of the fixed tube, and the two first gas storage tubes are located at the ends of the two support frames that are relatively far apart.

[0011] As a further technical solution of the present invention, a mounting bracket is fixedly installed in the middle of the outer side of the first gas storage pipe. The mounting bracket is connected to the inner side of the fixed pipe. A first piston plate is movably sleeved inside the first gas storage pipe. A first piston rod is fixedly connected to one end of the first piston plate near the support frame. One end of the first piston rod passes through one end of the first gas storage pipe and is fixedly connected to a limiting plate. The limiting plate is connected to the support frame.

[0012] As a further technical solution of the present invention, a first return spring is movably sleeved on the outer side of the first piston rod. The upper and lower ends of the first return spring are respectively connected to one end of the first gas storage tube and one end of the limiting plate. An air inlet valve is fixedly connected to the right side of the two first gas storage tubes at their respective ends. The air inlet valve is connected to the gas delivery tube. An exhaust valve is fixedly connected to the left side of the two first gas storage tubes at their respective ends. Both the air inlet valve and the exhaust valve pass through one side of the fixed tube. Both the air inlet valve and the exhaust valve are equipped with a one-way valve inside, and the valve directions are respectively inward conduction and outward cut-off, and outward conduction and inward cut-off.

[0013] When the fiber thread is wound around the outer side of the fiber fixing assembly, it is positioned between the two movable tubes. Opening the valves at both ends of the four-way valve allows external high-pressure airflow to be introduced through the four-way valve into the two three-way valves, and then transported through the air supply pipe into the intake valve. As the external airflow enters, pressure is applied to the first piston plate. The first piston plate and first piston rod then move towards the support frame, bringing the two first piston rods closer together. Simultaneously, the two first return springs are stretched, causing the two support frames to move closer together under the action of the slots. This, in turn, causes the two movable tubes to move closer together, sliding relative to the fixed tube, thus clamping the fiber thread between the two movable tubes and completing the fiber thread fixing process. Disassembly simply requires opening the exhaust valve to release the air inside the first air storage tube, and the return springs allow the two movable tubes to move away from each other, completing the fiber thread disassembly process.

[0014] By utilizing high-pressure airflow, the input high-pressure airflow is used as power to bring two movable tubes closer together, thereby fixing the fiber thread. When the air is released, the two movable tubes can be automatically reset, thus removing the fiber thread. The entire process only requires controlling the opening and closing of the valve, eliminating the need for manual knotting. Furthermore, manual disassembly is not required during removal, effectively simplifying the fixing and unfixing process and promoting the improvement of overall stretching and forming efficiency.

[0015] As a further technical solution of the present invention, a fixing groove is provided in the middle of the outer side of the tension roller, and longitudinal guide blocks are fixedly installed in the middle of both the front and rear ends of the tension roller. The tension roller is movably engaged with the longitudinal guide rail through the longitudinal guide blocks, and the tension roller moves up and down relative to the longitudinal guide rail. Second mounting shafts are symmetrically installed at the front and rear ends of the tension roller near the left and right sides. A connecting rod is movably connected to the outer side of the second mounting shaft, and the other end of the connecting rod is movably connected to the first mounting shaft.

[0016] As a further technical solution of the present invention, an extension rod is fixedly connected to the top of each of the two longitudinal guide blocks, and a fixing frame is provided above the two extension rods. The left and right sides of the bottom of the fixing frame are connected to the top of the extension rods. The fixing frame is located directly below the second gas storage pipe, and a second piston plate is movably sleeved inside the second gas storage pipe.

[0017] As a further technical solution of the present invention, a second piston rod located inside the second gas storage tube is fixedly connected to the bottom end of the second piston plate. The bottom end of the second piston rod passes through the bottom end of the second gas storage tube and is connected to the top end of the fixing frame. A second return spring is movably sleeved on the outer side of the second piston rod. The upper and lower ends of the second return spring are respectively connected to the bottom end of the second gas storage tube and the top end of the fixing frame. A second exhaust pipe is fixedly connected to the left and right sides of the second gas storage tube near the top end. A solenoid valve is installed inside the second exhaust pipe.

[0018] When tension adjustment is required, to increase tension, high-pressure air can be released into the second air storage pipe by opening the valve at the bottom of the four-way valve. As air enters, the pressure on the top of the second piston plate increases, causing the second piston rod to move downwards and the second return spring to be compressed. The fixing frame then experiences downward pressure, causing the longitudinal guide block to move relative to the longitudinal guide rail. Under the influence of the longitudinal guide block, the tension roller moves downwards. As the tension roller moves downwards, multiple connecting rods deflect, reducing the angle between each pair of connecting rods. This causes the two fiber fixing components to experience inward tension and, guided by the transverse guide block and the transverse guide rail, to move relative to each other. As the pressure exerted by the tension roller on the fiber increases, combined with the guiding effect of the two fiber fixing components, the tension on the fiber increases, completing the adaptive adjustment process.

[0019] By reusing the high-pressure airflow, the pressure of the high-pressure airflow is directly applied to the inside of the second air storage pipe. The increase in airflow causes the tension roller to move automatically downward. In conjunction with the linkage, the two fiber fixing components move closer together. By changing the vertical position of the tension roller and the distance between the two fiber fixing components, the pressure applied to the fiber thread is changed, thereby adjusting the tension. The entire adjustment process can be completed automatically without stopping the machine for adjustment. Dynamic adjustments can be made during operation, improving the efficiency of stretch forming.

[0020] When tension adjustment needs to be reset, high-pressure airflow can be stopped from entering the second air storage pipe. The air inside the second air storage pipe can be discharged by opening the solenoid valve inside the second exhaust pipe. The high-pressure air discharged at this time can then act on the surface of the fiber thread for self-cleaning. At the same time, when increasing the tension, the valve inside the second exhaust pipe can also be opened to output high-pressure air to act on the side of the fiber fixing component while maintaining the relative position of the tension roller. The air resistance further increases the tension, thus completing the tension compensation.

[0021] By directly utilizing the high-pressure airflow, the air during device reset is directly directed to the surface of the fiber thread to achieve self-cleaning and improve the cleanliness of the fiber thread. At the same time, the high-pressure airflow can also be directly directed to further push the fiber thread outward through the air resistance, increasing the pressure on the fiber thread surface and further increasing the tension, thus achieving tension compensation. The effect of the high-pressure airflow is fully utilized, significantly improving the practicality of the device.

[0022] A forming method for a spandex filament manufacturing stretching forming apparatus includes the following steps:

[0023] S1: Before stretching, the fiber thread can be first threaded into the device through the threading hole and wound around the outer side of the left fixed tube and between the two movable tubes. Then, it is wound around the outer side of the tension roller, i.e., inside the fixed groove, and at the same time, it is wound around the outer side of the right fixed tube, i.e., between the two movable tubes. Finally, it is threaded out through the outlet hole and connected to the take-up roller to complete the fixation of the fiber thread. At the same time, the external high-pressure air source needs to be connected to the top of the four-way valve to complete the preparation before stretching.

[0024] S2: After the fiber thread is wound around the outer side of the fiber fixing component, the high-pressure airflow can be input into the three-way valve through the four-way valve by opening the valves at both ends of the four-way valve, and then enter the air inlet valve through the air supply pipe. At this time, the first air storage pipe is filled with high-pressure airflow and applies pressure to the first piston plate, which drives the two first piston rods to move closer to each other. At this time, the two support frames move closer to each other, and finally drive the two movable tubes to move closer to each other to complete the clamping process of the fiber thread, that is, to complete the fixing of the fiber thread.

[0025] S3: When it is necessary to adjust the tension, i.e. increase the tension, the high-pressure airflow can be introduced into the second air storage pipe through the top of the valve at the bottom of the four-way valve. At this time, pressure can be applied to the second piston plate. The second piston plate and the second piston rod move down and drive the second return spring to be compressed. The second piston rod then applies pressure to the fixing frame. The longitudinal guide block moves downward relative to the longitudinal guide rail, which drives the tension roller to move downward. At this time, the two connecting rods deflect, i.e., the included angle between the two connecting rods decreases. The two fiber fixing components move closer to each other, which increases the pressure applied to the fiber thread and completes the tension adjustment. Finally, the fiber thread stretching and forming process can be completed by the external winding device.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. This invention utilizes high-pressure airflow as a power source to bring two movable tubes closer together, thereby fixing the fiber thread. When the air is released, the two movable tubes automatically reset, allowing the fiber thread to be removed. The entire process only requires controlling the opening and closing of the valve, eliminating the need for manual knotting. Furthermore, manual disassembly is also unnecessary during removal. This effectively simplifies the fixing and unfixing process and promotes improved efficiency in overall stretching and forming.

[0028] 2. This invention reuses high-pressure airflow, directly applying pressure to the interior of the second air storage pipe. The increased airflow causes the tension roller to automatically move downwards, and the linkage with the connecting rod brings the two fiber fixing components closer together. By changing the vertical position of the tension roller and the distance between the two fiber fixing components, the pressure applied to the fiber thread is altered, thereby adjusting the tension. The entire adjustment process is automated, requiring no machine downtime for adjustment. Dynamic adjustments can be made during operation, improving the efficiency of stretch forming.

[0029] 3. This invention utilizes high-pressure airflow directly, allowing the air during device reset to be directly directed onto the surface of the fiber thread, achieving self-cleaning and improving the cleanliness of the fiber thread. Simultaneously, the high-pressure airflow can be directly directed to further propel the fiber thread outward through air resistance, increasing the surface pressure and tension of the fiber thread, thus achieving tension compensation. The effect of high-pressure airflow is fully utilized, significantly improving the practicality of the device. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram showing the fit between the frame and fiber optic cable structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the cooperation between the tension roller and the connecting rod structure of the present invention;

[0033] Figure 4 This is an exploded view of the four-way valve and the second gas storage pipe structure of the present invention.

[0034] Figure 5 This is a cross-sectional schematic diagram of the internal structure of the second gas storage pipe of the present invention;

[0035] Figure 6 This is a separate schematic diagram of the fiber fixing component structure of the present invention;

[0036] Figure 7 This is an exploded view of the fixed tube and movable tube structure of the present invention;

[0037] Figure 8 This is a cross-sectional schematic diagram of the internal structure of the fixed tube of the present invention.

[0038] In the diagram: 1. Frame; 2. Threading hole; 3. Outlet hole; 4. Horizontal guide rail; 5. Vertical guide rail; 6. Fiber thread; 7. Fiber fixing assembly; 701. Fixing tube; 702. Slot; 703. Movable tube; 704. Anti-slip groove; 705. Support frame; 706. First air storage tube; 707. Inlet valve; 708. Exhaust valve; 709. Mounting bracket; 7010. First piston plate; 7011. First piston rod; 7012. First piston ring. Position spring; 7013, limiting plate; 7014, first mounting shaft; 7015, transverse guide block; 8, tension roller; 9, longitudinal guide block; 10, connecting rod; 11, extension rod; 12, fixing frame; 13, fixing groove; 14, four-way valve; 15, three-way valve; 16, air supply pipe; 17, second air storage pipe; 18, second exhaust pipe; 19, second piston plate; 20, second piston rod; 21, second return spring; 22, second mounting shaft. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1 to 8 As shown in the embodiment of the present invention, a spandex filament manufacturing stretching and forming device includes a frame 1. Transverse guide rails 4 are installed on both the front and rear sides of the frame 1. Longitudinal guide rails 5 are fixedly installed at the center of the bottom of each of the two transverse guide rails 4. A threading hole 2 is opened in the center of the left side of the frame 1, and a thread outlet hole 3 is opened in the center of the right side of the frame 1. Fiber fixing components 7 are symmetrically arranged on the left and right sides of each of the two transverse guide rails 4. The fiber fixing components 7 are movably engaged with the transverse guide rails 4, and the fiber fixing components 7 can move left and right relative to the transverse guide rails 4. A tension roller 8 is provided at the bottom between the two fiber fixing components 7, and the tension roller 8 is always located between the two fiber fixing components 7. In the position of the part, the inside of the frame 1 is provided with fiber thread 6. One end of the fiber thread 6 passes through the thread hole 2 in sequence and is wound around the outer side of the left fiber fixing component 7, the outer side of the tension roller 8, and the outer side of the right fiber fixing component 7 in sequence, and passes out through the outlet hole 3. A second air storage pipe 17 is provided above the tension roller 8. A four-way valve 14 is provided above the second air storage pipe 17. The bottom end of the four-way valve 14 is connected to the top end of the second air storage pipe 17. Both the left and right ends of the four-way valve 14 are fixedly connected to three-way valves 15. Both the front and rear ends of the three-way valve 15 are fixedly connected to air supply pipes 16. The other end of the air supply pipe 16 is connected to the fiber fixing component 7.

[0041] Before the device is put into operation, the external air source must first be connected to the four-way valve 14, and the device is hoisted using an external frame. At the same time, the winding device is placed at the right end of the device. Then, the corresponding fiber 6 is first passed through the threading hole 2 and wound around the outer side of the fiber fixing component 7 on the left, then wound around the outer side of the tension roller 8, and then wound around the outer side of the fiber fixing component 7 on the right. Finally, it passes through the thread outlet hole 3 and is connected to the external winding device. The winding device keeps the fiber 6 in a taut state, and the fiber 6 is always in a "U" shape during the entire stretching and forming process.

[0042] like Figure 1 and Figure 6 as well as Figure 7 and Figure 8As shown, the fiber fixing assembly 7 includes a fixing tube 701. A first mounting shaft 7014 is fixedly installed at the middle of both the front and rear ends of the fixing tube 701. A transverse guide block 7015 is fixedly sleeved on the outer surface of each of the first mounting shafts 7014. The transverse guide block 7015 is movably engaged with the transverse guide rail 4, allowing the fixing tube 701 to move left and right relative to the transverse guide rail 4 via the transverse guide block 7015. A slot 702 is evenly spaced at the front and rear ends of the outer surface of the fixing tube 701. Movable tubes 703 are provided at both the front and rear ends of the outer surface of the fixing tube 701. Anti-slip grooves 704 are provided at the relatively close ends of the tubes 703. The inner diameter of the movable tube 703 is the same as the diameter of the fixed tube 701. A support frame 705 is fixedly installed in the middle of the inner side of the movable tube 703. The movable tube 703 is movably engaged with the slot 702 through the support frame 705. The movable tube 703 moves back and forth relative to the slot 702. The front and rear ends of the inner side of the fixed tube 701 are provided with first air storage tubes 706. The two first air storage tubes 706 are located at the relatively far ends of the two support frames 705. An installation bracket is fixedly installed in the middle of the outer side of the first air storage tube 706. 709, the mounting bracket 709 is connected to the inner side of the fixed tube 701. A first piston plate 7010 is movably sleeved inside the first gas storage tube 706. A first piston rod 7011 is fixedly connected to one end of the first piston plate 7010 near the support frame 705. One end of the first piston rod 7011 passes through one end of the first gas storage tube 706 and is fixedly connected to a limiting plate 7013. The limiting plate 7013 is connected to the support frame 705. A first return spring 7012 is movably sleeved on the outer side of the first piston rod 7011. The upper and lower sides of the first return spring 7012... The two first gas storage pipes 706 are respectively connected to one end of the first gas storage pipe 706 and one end of the limiting plate 7013. An air intake valve 707 is fixedly connected to the right side of the two first gas storage pipes 706 that is relatively far from one end. The air intake valve 707 is connected to the gas delivery pipe 16. An exhaust valve 708 is fixedly connected to the left side of the two first gas storage pipes 706 that is relatively far from one end. Both the air intake valve 707 and the exhaust valve 708 pass through one side of the fixed pipe 701. Both the air intake valve 707 and the exhaust valve 708 are equipped with a one-way valve inside, and the valve directions are respectively inward opening and outward closing, and outward opening and inward closing.

[0043] Example 1:

[0044] When the fiber 6 is wound around the outer side of the fiber fixing assembly 7, the fiber 6 is located between the two movable tubes 703. Opening the valves at both ends of the four-way valve 14 allows external high-pressure airflow to be input into the two three-way valves 15 through the four-way valve 14, and then transported into the inlet valve 707 through the air supply pipe 16. With the entry of the external airflow, pressure is applied to the first piston plate 7010. At this time, the first piston plate 7010 and the first piston rod 7011 move towards the support frame 705, meaning the two first piston rods 7011 move closer together. As the first return spring 7012 is stretched, the two support frames 705 move closer together under the action of the slot 702, which in turn drives the two movable tubes 703 to move closer together. That is, the two movable tubes 703 slide relative to the fixed tube 701, and the fiber filament 6 is clamped between the two movable tubes 703, thus completing the fixing process of the fiber filament 6. When disassembling, simply open the valve of the exhaust valve 708 to release the air inside the first air storage tube 706, and under the reset action of the first return spring 7012, the two movable tubes 703 move away from each other, thus completing the disassembly process of the fiber filament 6.

[0045] By utilizing high-pressure airflow, the input high-pressure airflow is used as power to bring the two movable tubes 703 closer together, thereby fixing the fiber thread 6. When the air is released, the two movable tubes 703 can be automatically reset, and the fiber thread 6 can be removed. The entire process only requires controlling the opening and closing of the valve, eliminating the need for manual knotting. Furthermore, manual disassembly is not required during removal, effectively simplifying the fixing and unfixing process and promoting the improvement of the overall stretching and forming efficiency.

[0046] like Figure 1 and Figure 3 as well as Figure 4 and Figure 5As shown, a fixing groove 13 is provided in the middle of the outer side of the tension roller 8. Longitudinal guide blocks 9 are fixedly installed in the middle of both the front and rear ends of the tension roller 8. The tension roller 8 is movably engaged with the longitudinal guide rail 5 through the longitudinal guide blocks 9, and the tension roller 8 moves up and down relative to the longitudinal guide rail 5. Second mounting shafts 22 are symmetrically installed at the front and rear ends of the tension roller 8 near the left and right sides. A connecting rod 10 is movably connected to the outer side of the second mounting shaft 22. The other end of the connecting rod 10 is movably connected to the first mounting shaft 7014. An extension rod 11 is fixedly connected to the top of each of the two longitudinal guide blocks 9. A fixing frame 12 is provided above the two extension rods 11. The left and right sides of the bottom of the fixing frame 12 are connected to the top of the extension rods 11. The connection is as follows: the fixing frame 12 is located directly below the second gas storage pipe 17. The second piston plate 19 is movably sleeved inside the second gas storage pipe 17. The bottom end of the second piston plate 19 is fixedly connected to the second piston rod 20 located inside the second gas storage pipe 17. The bottom end of the second piston rod 20 passes through the bottom end of the second gas storage pipe 17 and is connected to the top end of the fixing frame 12. The outer side of the second piston rod 20 is movably sleeved with the second return spring 21. The upper and lower ends of the second return spring 21 are respectively connected to the bottom end of the second gas storage pipe 17 and the top end of the fixing frame 12. The left and right sides of the second gas storage pipe 17 near the top end are fixedly connected to the second exhaust pipe 18. The second exhaust pipe 18 is equipped with a solenoid valve.

[0047] Example 2: When the tension needs to be adjusted, if an increase in tension is required, high-pressure air can be released into the second air storage pipe 17 by opening the valve at the bottom of the four-way valve 14. As the air enters, the pressure on the top of the second piston plate 19 increases, and the second piston rod 20 moves downward, while the second return spring 21 is compressed. At this time, the fixing frame 12 is subjected to downward pressure, which causes the longitudinal guide block 9 to move relative to the longitudinal guide rail 5. Under the drive of the longitudinal guide block 9, the tension roller 8 moves downward. When the tension roller 8 moves downward, the multiple connecting rods 10 deflect, and the angle between each pair of connecting rods 10 decreases. At this time, the two fiber fixing components 7 are subjected to inward pulling force and, under the guidance of the transverse guide block 7015 and the transverse guide rail 4, they move relative to each other, bringing the two fiber fixing components 7 closer together. At this time, due to the increased pressure applied by the tension roller 8 to the fiber thread 6, combined with the guiding effect of the two fiber fixing components 7, the tension on the fiber thread 6 increases, completing the adaptive adjustment process.

[0048] By reusing the high-pressure airflow, the pressure of the high-pressure airflow is directly applied to the interior of the second air storage pipe 17. The increase in airflow causes the tension roller 8 to move automatically downward. In conjunction with the linkage of the connecting rod 10, the two fiber fixing components 7 are brought closer together. By changing the vertical position of the tension roller 8 and the distance between the two fiber fixing components 7, the pressure applied to the fiber thread 6 is changed, thereby adjusting the tension. The entire adjustment process can be completed automatically without stopping the machine for adjustment. Dynamic adjustments can be made during operation, improving the efficiency of stretch forming.

[0049] When the tension adjustment needs to be reset, high-pressure airflow can be stopped from entering the second air storage pipe 17. The air inside the second air storage pipe 17 can be discharged by opening the solenoid valve inside the second exhaust pipe 18. The high-pressure air output can then be discharged through the second exhaust pipe 18 and act on the surface of the fiber thread 6 for self-cleaning. At the same time, when the tension is increased, the valve inside the second exhaust pipe 18 can be opened to output high-pressure air while maintaining the relative position of the tension roller 8. The high-pressure air acts on the side of the fiber fixing component 7, and the tension is further increased by the air resistance, thus completing the tension compensation.

[0050] By directly utilizing the high-pressure airflow, the air during device reset is directly directed to act on the surface of fiber 6, achieving self-cleaning of fiber 6 and improving the cleanliness of fiber 6. At the same time, the high-pressure airflow can also be directly directed to further push fiber 6 outward through the air resistance, increasing the pressure on the surface of fiber 6, further increasing the tension, and achieving tension compensation. The effect of high-pressure airflow is fully utilized, significantly improving the practicality of the device.

[0051] A forming method for a spandex filament manufacturing stretching forming apparatus includes the following steps:

[0052] S1: Before stretching and forming, the fiber 6 can first be threaded into the device through the threading hole 2 and wound around the outer side of the left fixed tube 701 and between the two movable tubes 703. Then, it can be wound around the outer side of the tension roller 8, i.e., inside the fixed groove 13, and at the same time, it can be wound around the outer side of the right fixed tube 701, i.e., between the two movable tubes 703. Finally, it can be threaded out through the outlet hole 3 and connected to the take-up roller to complete the fixation of the fiber 6. At the same time, the external high-pressure air source needs to be connected to the top of the four-way valve 14 to complete the preparation before stretching and forming.

[0053] S2: After the fiber 6 is wound around the outer side of the fiber fixing assembly 7, the high-pressure airflow can be input into the three-way valve 15 through the four-way valve 14 by opening the valves at both ends of the four-way valve 14, and then enter the air inlet valve 707 through the air supply pipe 16. At this time, the first air storage pipe 706 is filled with high-pressure airflow and applies pressure to the first piston plate 7010, which drives the two first piston rods 7011 to move closer to each other. At this time, the two support frames 705 move closer to each other, and finally drive the two movable pipes 703 to move closer to each other to complete the clamping process of the fiber 6, that is, to complete the fixing of the fiber 6.

[0054] S3: When it is necessary to adjust the tension, i.e. increase the tension, the high-pressure airflow can be introduced into the interior of the second air storage pipe 17 through the top of the valve at the bottom of the four-way valve 14 by opening the valve. At this time, pressure can be applied to the second piston plate 19. The second piston plate 19 and the second piston rod 20 move down and drive the second return spring 21 to be compressed. The second piston rod 20 then applies pressure to the fixing frame 12. The longitudinal guide block 9 moves downward relative to the longitudinal guide rail 5, which drives the tension roller 8 to move downward. At this time, the two connecting rods 10 deflect, i.e., the included angle between the two connecting rods 10 decreases. The two fiber fixing components 7 move closer to each other, which increases the pressure applied to the fiber thread 6 and completes the tension adjustment. Finally, the fiber thread 6 can be stretched and formed by the external winding device.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spandex filament manufacturing stretching and forming apparatus, comprising a frame (1), characterized in that: The frame (1) is equipped with transverse guide rails (4) on both the front and rear sides. A longitudinal guide rail (5) is fixedly installed at the middle of the bottom of each of the two transverse guide rails (4). A wire hole (2) is provided in the middle of the left side of the frame (1), and a wire outlet hole (3) is provided in the middle of the right side of the frame (1). Fiber fixing components (7) are symmetrically provided on the left and right sides of the two transverse guide rails (4). The fiber fixing components (7) are movably engaged with the transverse guide rails (4). The fiber fixing components (7) move left and right relative to the transverse guide rails (4). A tension roller (8) is provided at the bottom between the two fiber fixing components (7). The tension roller (8) is always located in the middle between the two fiber fixing components (7). Positionally, the frame (1) is equipped with fiber thread (6) inside. One end of the fiber thread (6) passes through the thread hole (2) in sequence and is wound around the outer side of the left fiber fixing component (7), the outer side of the tension roller (8), and the outer side of the right fiber fixing component (7) in sequence, and exits through the thread outlet hole (3). A second air storage pipe (17) is provided above the tension roller (8). A four-way valve (14) is provided above the second air storage pipe (17). The bottom end of the four-way valve (14) is connected to the top end of the second air storage pipe (17). A three-way valve (15) is fixedly connected to both the left and right ends of the four-way valve (14). An air supply pipe (16) is fixedly connected to both the front and rear ends of the three-way valve (15). The other end of the gas pipe (16) is connected to the fiber fixing assembly (7). The fiber fixing assembly (7) includes a fixing pipe (701). A first mounting shaft (7014) is fixedly installed at the middle of both the front and rear ends of the fixing pipe (701). A transverse guide block (7015) is fixedly sleeved on the outer side of the first mounting shaft (7014). The transverse guide block (7015) is movably engaged with the transverse guide rail (4). The fixing pipe (701) moves left and right relative to the transverse guide rail (4) through the transverse guide block (7015). A slot (702) is evenly provided at an angle on the outer side of the fixing pipe (701) near the front and rear ends. The outer side of the fixed tube (701) has movable tubes (703) at both the front and rear ends. Anti-slip grooves (704) are provided at the relatively close ends of the two movable tubes (703). The inner diameter of the movable tube (703) is the same as the diameter of the fixed tube (701). A support frame (705) is fixedly installed in the middle of the inner side of the movable tube (703). The movable tube (703) is movably engaged with the slot (702) through the support frame (705). The movable tube (703) moves back and forth relative to the slot (702). The fixed tube (701) has first air storage tubes (706) at both the front and rear ends of its inner side. The two first air storage tubes (706) are located at the relatively far ends of the two support frames (705).A mounting bracket (709) is fixedly installed on the middle of the outer side of the first gas storage pipe (706). The mounting bracket (709) is connected to the inner side of the fixed pipe (701). A first piston plate (7010) is movably sleeved inside the first gas storage pipe (706). A first piston rod (7011) is fixedly connected to one end of the first piston plate (7010) near the support frame (705). One end of the first piston rod (7011) passes through one end of the first gas storage pipe (706) and is fixedly connected to a limiting plate (7013). The limiting plate (7013) is connected to the support frame (705).

2. The spandex filament manufacturing stretching and forming apparatus according to claim 1, characterized in that: The outer side of the first piston rod (7011) is movably sleeved with a first return spring (7012). The upper and lower ends of the first return spring (7012) are respectively connected to one end of the first gas storage pipe (706) and one end of the limiting plate (7013). The right side of the two first gas storage pipes (706) that are relatively far from one end is fixedly connected to an air intake valve (707). The air intake valve (707) is connected to the gas delivery pipe (16). The left side of the two first gas storage pipes (706) that are relatively far from one end is fixedly connected to an exhaust valve (708). The air intake valve (707) and the exhaust valve (708) both pass through one side of the fixed pipe (701). The air intake valve (707) and the exhaust valve (708) are both equipped with a one-way valve, and the valve directions are respectively inward conduction and outward cut-off, and outward conduction and inward cut-off.

3. The spandex filament manufacturing stretching and forming apparatus according to claim 1, characterized in that: A fixing groove (13) is provided in the middle of the outer side of the tension roller (8). A longitudinal guide block (9) is fixedly installed in the middle of both the front and rear ends of the tension roller (8). The tension roller (8) is movably engaged with the longitudinal guide rail (5) through the longitudinal guide block (9). The tension roller (8) moves up and down relative to the longitudinal guide rail (5). A second mounting shaft (22) is symmetrically installed at both the front and rear ends of the tension roller (8) near the left and right sides. A connecting rod (10) is movably connected to the outer side of the second mounting shaft (22). The other end of the connecting rod (10) is movably connected to the first mounting shaft (7014).

4. The spandex filament manufacturing stretching and forming apparatus according to claim 3, characterized in that: The top ends of the two longitudinal guide blocks (9) are fixedly connected with extension rods (11), and a fixing frame (12) is provided above the two extension rods (11). The left and right sides of the bottom end of the fixing frame (12) are connected to the top end of the extension rods (11). The fixing frame (12) is located directly below the second gas storage pipe (17). The second gas storage pipe (17) is movably fitted with a second piston plate (19).

5. The spandex filament manufacturing stretching and forming apparatus according to claim 4, characterized in that: The bottom end of the second piston plate (19) is fixedly connected to the second piston rod (20) located inside the second gas storage pipe (17). The bottom end of the second piston rod (20) passes through the bottom end of the second gas storage pipe (17) and is connected to the top end of the fixing frame (12). The outer side of the second piston rod (20) is movably sleeved with the second return spring (21). The upper and lower ends of the second return spring (21) are respectively connected to the bottom end of the second gas storage pipe (17) and the top end of the fixing frame (12). The left and right sides of the second gas storage pipe (17) near the top end are fixedly connected to the second exhaust pipe (18). The second exhaust pipe (18) is equipped with a solenoid valve inside.

6. A forming method for a spandex filament manufacturing stretching forming apparatus according to any one of claims 1-5, characterized in that: Includes the following steps: S1: Before stretching, the fiber thread (6) can be first threaded into the device through the thread hole (2) and wound around the outer side of the left fixed tube (701) and between the two movable tubes (703). Then, it is wound around the outer side of the tension roller (8) and inside the fixed groove (13), and at the same time, it is wound around the outer side of the right fixed tube (701) and between the two movable tubes (703). Finally, it is threaded out through the outlet hole (3) and connected to the take-up roller to complete the fixation of the fiber thread (6). At the same time, the external high-pressure air source needs to be connected to the top of the four-way valve (14) to complete the preparation before stretching. S2: When the fiber thread (6) is wound around the outer side of the fiber fixing assembly (7), the high-pressure airflow can be input into the interior of the three-way valve (15) by opening the valves at both ends of the four-way valve (14), and then enter the interior of the air inlet valve (707) through the air supply pipe (16). At this time, the interior of the first air storage pipe (706) is filled with high-pressure airflow, and pressure is applied to the first piston plate (7010), which drives the two first piston rods (7011) to move closer to each other. At this time, the two support frames (705) move closer to each other, and finally drive the two movable pipes (703) to move closer to each other to complete the clamping process of the fiber thread (6), that is, to complete the fixing of the fiber thread (6). S3: When it is necessary to adjust the tension, i.e. increase the tension, the high-pressure airflow can be introduced into the interior of the second air storage pipe (17) through the top of the valve at the bottom of the four-way valve (14). At this time, pressure can be applied to the second piston plate (19). The second piston plate (19) and the second piston rod (20) move down and drive the second return spring (21) to be compressed. At this time, the second piston rod (20) applies pressure to the fixing frame (12). At this time, the longitudinal guide block (9) moves down relative to the longitudinal guide rail (5), i.e., drives the tension roller (8) to move down. At this time, the two connecting rods (10) deflect, i.e., the angle between the two connecting rods (10) decreases. The two fiber fixing components (7) move closer to each other, which increases the pressure applied to the fiber thread (6) and completes the tension adjustment. Finally, the fiber thread (6) stretching and forming process can be completed by the external winding device.

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