Fiber web shaping device with progressive compaction and periodic draw function

Abstract

A fiber web shaping device with progressive compaction and periodic drawing function, which belongs to the field of non-woven textile machinery technology. It includes a pair of frames, which are arranged between the web output mechanism of the carding machine and the laying machine; a drawing roller is rotatably supported between the opposite sides of the pair of frames at the right side corresponding to the web output mechanism; a fiber web conveying mechanism and a cotton pressing mechanism for conveying the fiber web to the laying machine; a fiber web buffer and release mechanism and a buffer curtain roller up-down reciprocating displacement driving mechanism are arranged between the opposite sides of the pair of frames. Advantage: ensure that the laying trolley of the laying machine in the subsequent laying process accurately positions the web to the preset position and achieves transverse preset profile control and accurately realizes the transverse uniformity adjustment of the non-woven product; ensure that the length of the output web in unit time is consistent with the previous one, and can adapt to the repeated alternating rhythm of the laying speed of the laying trolley.

Description

Technical Field

[0001] This utility model belongs to the field of nonwoven machinery technology, specifically relating to a fiber web shaping device with progressive compaction and periodic stretching functions, which is configured between a carding machine and a web laying machine in use. Background Technology

[0002] As a complete nonwoven product production line, the main equipment typically includes a bale opener, a cotton blending and weighing machine (if it is a single type of fiber, the cotton blending and weighing machine can be omitted), a carding machine, a web laying machine, and a needle punching machine (or a hydroentangling machine). The nonwoven fibers after being opened by the bale opener are fed to the cotton blending and weighing machine, then to the carding machine for carding, and then to the web laying machine to be laid into a cotton web layer. Finally, a conveying device such as a conveyor curtain sends the fibers to the needle punching machine for needle punching or to the hydroentangling machine for hydroentangling, thus obtaining the nonwoven product.

[0003] Based on professional knowledge and from a technological perspective, since the web laying machine is necessarily located before the needle punching machine or hydroentangling machine, the web laying machine is considered a pre-processing device relative to the needle punching machine or hydroentangling machine. The process of supplying the nonwoven fiber web laid out by the web laying machine to the needle punching machine or hydroentangling machine for needle punching or hydroentangling usually involves, but is not limited to, the following scenarios: First, the nonwoven fiber web laid out by the bottom curtain of the web laying machine is sequentially stretched by the stretching machine and then fed to the needle punching machine by the feeder; second, the nonwoven fiber web laid out by the bottom curtain of the web laying machine is sequentially stretched by the stretching machine and then conveyed to the hydroentangling machine by the conveyor curtain; third, the nonwoven fiber web laid out by the bottom curtain of the web laying machine is supplied to the feeder and then fed to the needle punching machine.

[0004] As is known in the industry, the web-laying trolley in a web-laying machine structure moves back and forth. The speed of the trolley needs to be appropriately reduced when it changes direction (also known as "reversal") or returns at the left and right ends, while the speed increases accordingly in other areas. In other words, the web-laying speed involves a repeated alternating process of slowing down and then speeding up again. During the aforementioned web-laying period when the speed decreases, there is often unavoidable redundancy in the web. If the redundant web generated by the slowing speed of the web-laying trolley is not temporarily stored and not digested or released when the speed of the web-laying trolley increases, the laid-up fiber web will exhibit a thickness difference between the ends and the middle, affecting the quality of the needle-punched nonwoven product.

[0005] Existing technologies addressing these issues primarily focus on the motion control and mechanical optimization of the web laying machine itself. Specifically, motion control optimization involves smoothing trolley speed changes and reducing inertial impact through S-shaped acceleration / deceleration curves and dynamic force-speed compensation methods (such as PID control based on speed feedforward). However, in high-speed web laying scenarios (e.g., trolley speeds exceeding 5 m / s), the lag in the mechanical system's response makes it difficult to completely eliminate the disturbance to the fiber web caused by sudden speed changes. Power mechanism optimization utilizes multi-axis collaboration and servo compensation, employing servo motors to synchronously drive the web laying trolley, front and rear curtains, and compensation curtains. Encoders provide real-time feedback of position and speed, dynamically correcting the motion parameters of each unit. However, this approach relies on precision mechanical transmissions (such as synchronous belts and gearboxes), which are prone to wear and tear leading to decreased synchronization accuracy after long-term operation, and is also costly. Mechanical structure optimization includes adding carbon fiber antistatic curtains to reduce airflow interference and designing double-compensation curtain structures to buffer positional deviations. However, these improvements only alleviate localized problems and cannot fundamentally solve the dynamic mismatch between fiber web supply and web laying demand.

[0006] As high-end nonwoven materials increasingly demand fiber uniformity (CN value < 3%), simply optimizing the performance of the web laying machine itself is no longer sufficient to meet the requirements.

[0007] Numerous technical information related to web laying machines can be found in publicly available Chinese patent documents, such as CN100554539A (web laying machine with compensation function) and CN101168871A (web laying mechanism with compensation function), etc. However, not all of these patents suffer from the dynamic mismatch problem mentioned above, nor do they provide any technical guidance to fundamentally solve the density fluctuation problem caused by the speed change of the web laying trolley, thus enabling real-time matching of fiber tension, speed, and the web laying machine's requirements. Utility Model Content

[0008] The present invention aims to provide a fiber web shaping device with progressive compaction and periodic stretching functions, which helps to gradually compact and intermittently stretch the loose fibers from the carding machine to change the unit density of the fiber web, ensure that the web laying trolley of the web laying machine is accurately positioned and laid in the preset position, and achieve lateral preset contour control and precise adjustment of the lateral uniformity of nonwoven products.

[0009] The present invention achieves its objective as follows: a fiber web shaping device with progressive compaction and periodic stretching functions includes a pair of frames arranged in a front-to-back configuration and spaced apart from each other. The opposing sides of the frames are connected by a frame connecting beam, forming a single unit. In use, the frames are positioned on the floor between the web output mechanism of the carding machine and the web laying machine. The right end of the web output mechanism is rotatably supported between the opposing sides of the frames. A stretching roller is rotatably supported between the opposing sides of the frames at a position corresponding to the right side of the web output mechanism. A fiber cotton feeder is used to convey the fiber web to the web laying machine. The machine includes a web conveying mechanism and a pressing mechanism, which are rotatably disposed between opposite sides of a pair of frames. The pressing mechanism is positioned above both the web output mechanism and the drafting roller, and above the web conveying mechanism, and simultaneously cooperates with both the drafting roller and the web conveying mechanism. A web buffer and release mechanism and a buffer roller reciprocating drive mechanism are also included. The web buffer and release mechanism is vertically displaced between opposite sides of the pair of frames, and the buffer roller reciprocating drive mechanism is similarly disposed between opposite sides of the pair of frames and connected to both the web conveying mechanism and the web buffer and release mechanism.

[0010] In a specific embodiment of this utility model, the fiber web output mechanism includes a driven roller of the fiber web output curtain, a driven roller of the fiber web output curtain, and a fiber web output curtain. The front end and rear end of the driven roller of the fiber web output curtain are connected to the front end and rear end of the driven roller of the fiber web output curtain by a shaft head rotating support bearing seat arm. The right end of the shaft head rotating support bearing seat arm is fixed to the opposite side of the pair of frames. The left end of the fiber web output curtain is sleeved on the driven roller of the fiber web output curtain, and the right end is sleeved on the driven roller of the fiber web output curtain.

[0011] In another specific embodiment of this utility model, the drafting roller is located on the right side of the active roller of the fiber web output curtain in the length direction, and is rotatably supported between the opposing sides of the pair of frames by means of the drafting roller shaft head and the drafting roller shaft head support bearing seat. The fiber web conveying mechanism is linked to the drafting roller. The buffer curtain roller reciprocating drive mechanism, which is connected to the fiber web conveying mechanism and the fiber web buffer and release mechanism, is located in the middle of the width direction of the pair of frames between the opposing sides of the pair of frames. The pressing mechanism is distributed on the left and right sides of the fiber web buffer and release mechanism.

[0012] In another specific embodiment of this utility model, the fiber web conveying mechanism includes a first guide roller for the fiber web output curtain, a second guide roller for the fiber web output curtain, a lifting guide roller for the fiber web output curtain, a transition guide roller for the fiber web output curtain, a tension adjusting roller for the fiber web output curtain, and a fiber web output curtain. The first guide roller and the second guide roller for the fiber web output curtain correspond to the lower right side of the fiber web buffer and release mechanism, and are rotatably supported between opposite sides of the pair of frames in a state that is both spaced apart from each other and parallel to each other. The lifting guide roller for the fiber web output curtain corresponds to the lower part of the length direction of the drafting roller. The front and rear ends of the lifting guide roller for the fiber web output curtain are each connected by a shaft head of the lifting guide roller for the fiber web output curtain and are lifted by means of the fiber web output curtain. The guide roller shaft head support bearing seat is connected to the buffer curtain roller reciprocating drive mechanism. The fiber web output curtain transition guide roller corresponds to the lower part of the fiber web buffer and release mechanism and is rotatably supported between a pair of frames. The fiber web output curtain tension adjustment roller is located on the lower right side of the fiber web output curtain transition guide roller and is adjusted vertically between opposite sides of a pair of frames via a sliding bearing seat. The fiber web output curtain is sleeved on the lower part of the drafting roller, the fiber web buffer and release mechanism, the first guide roller of the fiber web output curtain, the second guide roller of the fiber web output curtain, the tension adjustment roller of the fiber web output curtain, the transition guide roller of the fiber web output curtain, and the lifting guide roller of the fiber web output curtain. The pressing mechanism cooperates with the outward-facing side of the fiber web output curtain.

[0013] In another specific embodiment of this utility model, the pressing mechanism includes a first pressing roller located on the left side of the fiber web buffer and release mechanism and a second pressing roller located on the right side of the fiber web buffer and release mechanism. The first pressing roller is positioned above the output curtain drive roller and the drafting roller in the longitudinal direction, and is rotatably supported between opposite sides of the frame by first pressing roller shaft heads formed at its front and rear ends, each by means of a first pressing roller shaft head support bearing seat. The second pressing roller is positioned above the first guide roller and the second guide roller of the fiber web output curtain in the longitudinal direction, and is rotatably supported between opposite sides of the frame by second pressing roller shaft heads formed at its front and rear ends, each by means of a second pressing roller shaft head support bearing seat. The first and second pressing rollers cooperate with the outward-facing side of the fiber web output curtain.

[0014] In another specific embodiment of this utility model, the fiber web buffering and releasing mechanism includes an upper buffer roller, a lower buffer roller, a buffer curtain, and a pair of buffer roller frames. The pair of buffer roller frames are slidably arranged on opposite sides of the pair of frames and are located longitudinally at the middle of the width direction of the pair of frames. The front end and rear end of the upper buffer roller are each rotatably supported between the upper ends of the pair of buffer roller frames via upper buffer roller shaft heads and by means of upper buffer roller shaft head support bearing seats. The front end and rear end of the lower buffer roller are each supported via lower buffer roller shaft heads and by means of lower buffer roller shaft heads. The bearing seat is rotatably supported at the lower end of the buffer curtain roller frame. The upper end of the buffer curtain is sleeved on the upper roller of the buffer curtain, and the lower end is sleeved on the lower roller of the buffer curtain. The fiber web output curtain is fitted with the left side of the buffer curtain at the part sleeved on the stretching roller, and with the right side of the buffer curtain at the part sleeved on the first guide roller of the fiber web output curtain. The fiber web output curtain is fitted with the lower roller of the buffer curtain below in the length direction. The up-and-down reciprocating drive mechanism of the buffer curtain roller is connected to the pair of buffer curtain roller frames. The bearing seat of the lifting guide roller shaft of the fiber web output curtain is slidably fitted with the opposite side of the pair of frames.

[0015] In a further specific embodiment of this utility model, the reciprocating drive mechanism for the buffer roller includes a drive sprocket shaft, a driven sprocket shaft, a pair of drive sprockets, a pair of driven sprockets, a pair of drive chains, and a pair of driven chains. The front end and rear end of the drive sprocket shaft are rotatably supported between the lower parts of opposite sides of the pair of frames via drive sprocket shaft bearing seats. The driven sprocket shaft is located above the drive sprocket shaft, and its front end and rear end are rotatably supported between the upper parts of opposite sides of the pair of frames via driven sprocket shaft bearing seats. The pair of drive sprockets are respectively fixed to the front end and rear end of the drive sprocket shaft, and the pair of driven sprockets are respectively fixed to the driven sprocket shaft. The front and rear ends of the sprocket shaft, the lower part of the fiber cotton web output curtain lifting guide roller shaft head support bearing seat are connected to one end of a pair of drive chains, and the other end of the pair of drive chains are connected to the lower end of the pair of buffer curtain roller frames. The middle part of the pair of drive chains is respectively sleeved on a pair of drive sprockets. The upper part of the fiber cotton web output curtain lifting guide roller shaft head support bearing seat is connected to one end of a pair of driven chains, and the other end of the pair of driven chains is connected to the upper end of the pair of buffer curtain roller frames. The middle part of the pair of driven chains is respectively sleeved on a pair of driven sprockets. One of the drive sprockets is driven by a drive sprocket power mechanism set on one of the frames of the pair of frames.

[0016] In a further specific embodiment of this utility model, the pair of driving sprockets and the pair of driven sprockets are single-row sprockets or double-row sprockets. When the pair of driving and driven sprockets are single-row sprockets, the pair of driving and driven chains are single-row chains, and when the pair of driving and driven sprockets are double-row sprockets, the driving and driven chains are double-row chains.

[0017] In yet another specific embodiment of this utility model, the fiber web output curtain drive roller is rotatably connected to the output curtain drive roller drive mechanism on the outward side of either of the pair of frames; the drafting roller is drive-connected to the drafting roller drive mechanism on either of the pair of frames.

[0018] In another specific embodiment of this utility model, when the pair of buffer roller frames move upward, the U-shaped buffer cavity formed between the lower buffer roller and the fiber web output curtain is in a state of releasing the fiber web, and when the pair of buffer roller frames move downward, the U-shaped buffer cavity formed between the lower buffer roller and the fiber web output curtain is in a state of storing the fiber web.

[0019] The technical advantages of this invention are as follows: Since this invention can be installed between the fiber web output mechanism of the carding machine and the web laying machine during use, the loose fibers from the carding machine can be gradually compacted by the pressing mechanism. Furthermore, the movement of the buffer roller's reciprocating drive mechanism causes the drafting roller to intermittently draft the fibers from the fiber web output mechanism, thereby changing the unit density of the fiber web. This ensures that during the subsequent web laying process, the web laying trolley of the web laying machine accurately positions the web to a preset location, achieves lateral preset contour control, and precisely adjusts the lateral uniformity of the nonwoven product. Because the fiber web buffered on the fiber web conveying mechanism is released when the buffer roller's reciprocating drive mechanism moves upward, the length of the output web within a unit time remains consistent with the previous length, and it adapts to the alternating rhythm of the web laying speed of the web laying trolley. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 For relative to Figure 1 The diagram shows the buffer roller reciprocating drive mechanism changing from a downward state to an upward state, releasing the stored fiber web.

[0021] In the diagram: 1. Frame; 2. Fiber web output mechanism; 21. Driven roller of the fiber web output curtain; 211. Shaft head of the driven roller of the fiber web output curtain; 22. Driven roller of the fiber web output curtain; 221. Shaft head of the drive roller of the fiber web output curtain; 23. Fiber web output curtain; 3. Drafting roller; 31. Shaft head of the drafting roller; 4. Fiber web conveying mechanism; 41. First guide roller of the fiber web output curtain; 411. Shaft head of the first guide roller of the fiber web output curtain; 42. Second guide roller of the fiber web output curtain; 43. Lifting guide roller of the fiber web output curtain; 431. Shaft head of the lifting guide roller of the fiber web output curtain; 4311. Support bearing seat of the lifting guide roller of the fiber web output curtain; 44. Transition guide roller of the fiber web output curtain; 441. Shaft head of the transition guide roller of the fiber web output curtain; 45. Tension adjusting roller of the fiber web output curtain; 451. 452. Fiber web output curtain tension adjustment roller head; 453. Fiber web output curtain tension adjustment roller head support bearing seat; 46. Spring device; 47. Fiber web output curtain; 5. U-shaped buffer cavity; 5. Pressing mechanism; 51. First pressing roller; 511. First pressing roller head; 52. Second pressing roller; 521. Second pressing roller head; 6. Fiber web buffer and release mechanism; 61. Buffer curtain upper roller; 611. Buffer curtain upper roller head; 62. Buffer curtain lower roller; 621. Buffer curtain lower roller head; 63. Buffer curtain; 64. Buffer curtain roller frame; 7. Buffer curtain roller reciprocating drive mechanism; 71. Drive sprocket shaft; 72. Driven sprocket shaft; 73. Drive sprocket; 74. Driven sprocket; 75. Drive chain; 76. Driven chain; 8. Fiber layer; A. A. First grip point, B. Second grip point, C. Third grip point, D. Fourth grip point; V1. First velocity, V2. Second velocity, V3. Third velocity, V4. Fourth velocity. Detailed Implementation

[0022] In order to better understand the technical essence and beneficial effects of this utility model, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the solution of this utility model. Any formal but not substantive equivalent transformations made based on the concept of this utility model should be considered within the scope of the technical solution of this utility model.

[0023] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on the current position. Figure 1 The location and state are taken as a reference, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0024] Please see Figure 1The diagram shows a pair of frames 1 arranged in a front-to-back configuration with a gap between them. The opposing sides of the frames 1 are connected by a frame connecting beam (not shown but easily understood) to form a single unit. In use, the frames 1 are positioned on the floor between the web output mechanism 2 of the carding machine and the web laying machine. The right end of the web output mechanism 2 is rotatably supported between the opposing sides of the pairs of frames 1. A draft roller 3 is shown, rotatably supported between the opposing sides of the pairs of frames 1 at a position corresponding to the right side of the aforementioned web output mechanism 2. A web conveying mechanism 4 and a pressing mechanism 5 for conveying the fiber web to the web laying machine are also shown. The fiber web conveying mechanism 4 and the pressing mechanism 5 are rotatably arranged between opposite sides of a pair of frames 1. The pressing mechanism 5 is positioned above the aforementioned fiber web output mechanism 2 and the aforementioned drafting roller 3, and above the fiber web conveying mechanism 4, and simultaneously cooperates with the drafting roller 3 and the fiber web conveying mechanism 4. A fiber web buffer and release mechanism 6 and a buffer roller reciprocating drive mechanism 7 are shown. The fiber web buffer and release mechanism 6 is vertically displaced between opposite sides of a pair of frames 1. The buffer roller reciprocating drive mechanism 7 is also arranged between opposite sides of the aforementioned pair of frames 1 and is connected to the aforementioned fiber web conveying mechanism 4 and the fiber web buffer and release mechanism 6.

[0025] Based on the above explanation and in combination Figure 1 As can be seen, the core function of the fiber web shaping device with progressive compaction and periodic stretching functions provided by this utility model is to gradually compact the loose fibers, which are fed from the fiber web output mechanism 2 of the carding machine, by the pressing mechanism 5, and to achieve the change of fiber web unit density by stretching through the intermittently working stretching roller 3. Then, the subsequent web laying machine achieves precise positioning and lays the web to the preset position, achieving pre-control of the lateral profile, that is, the width direction of the fiber web or the width direction, and finally achieving the purpose of adjusting the lateral uniformity of the nonwoven product. Unlike existing technologies such as CVI, this utility model has an internal buffer function (which will be mentioned below) to achieve uniform output of the fiber web, thereby meeting the requirements of good connection with downstream equipment such as the web laying machine, reducing the difficulty of online control between equipment, and improving the stability of downstream equipment.

[0026] The purpose of stretching the fiber web from the web output mechanism 2 is to achieve a cyclical or alternating pattern of thick and thin sections in the fiber web output by the fiber web shaping device of this invention. When the stretching roller 3 is in the stretching process, its rotation speed is high, resulting in a high output web speed, which is detrimental to the normal operation of the web laying machine. Therefore, redundant stretched fiber web is temporarily stored through buffering, as mentioned above, to ensure that the length of the output fiber web is consistent within a unit time and avoid fluctuations. When the stretching roller 3 is not stretching, its speed decreases, allowing the previously stored fiber web to be released, similarly achieving a consistent length of the fiber web fed to the web laying machine within a unit time.

[0027] To avoid ambiguity, the applicant declares that the concept of "caching" mentioned above and below means "storage".

[0028] See you later Figure 1 The aforementioned fiber web output mechanism 2 includes a driven roller 21 for the fiber web output curtain, a driven roller 22 for the fiber web output curtain, and a fiber web output curtain 23. The front end and the rear end of the driven roller 211 of the driven roller 21 are connected to the front end and the rear end of the driven roller 221 of the driven roller 22 by a shaft head rotating support bearing seat arm. The right end of the aforementioned shaft head rotating support bearing seat arm is fixed to the opposite side of the aforementioned pair of frames 1. The left end of the shaft head rotating support bearing seat arm is supported on a support foot or similar component not shown in the figure. The left end of the fiber web output curtain 23 is sleeved on the driven roller 21 of the fiber web output curtain, while the right end is sleeved on the driven roller 22 of the fiber web output curtain.

[0029] The figure also shows the process of conveying the fiber layer 8 combed by the carding machine towards the drafting roller 3 by the fiber web output curtain 23.

[0030] The aforementioned drafting roller 3 is located on the right side of the active roller 22 of the web output curtain in the longitudinal direction, and is rotatably supported between the opposing sides of the aforementioned pair of frames 1 by means of the drafting roller shaft head 31 at its front and rear ends and by means of the drafting roller shaft head support bearing seat; the aforementioned fiber web conveying mechanism 4 is linked with the aforementioned drafting roller 3. The linkage mentioned here means that the fiber web conveying mechanism 4 is also in working state when the drafting roller 3 is working. This is because the fiber web output curtain 46 of the fiber web conveying mechanism 4 structure system, which will be mentioned below, is sleeved on the drafting roller 3, and the drafting roller 3 is used as the power roller to drive the fiber web conveying mechanism 4 to convey the fiber web to the rear, that is, to the right, that is, to the web laying machine at a uniform speed. The aforementioned buffer roller reciprocating drive mechanism 7, which is connected to the aforementioned fiber web conveying mechanism 4 and the aforementioned fiber web buffer and release mechanism 6, is located in the middle of the width direction of the pair of frames 1 between the opposing sides of the aforementioned pair of frames 1; the aforementioned pressing mechanism 5 is distributed on the left and right sides of the aforementioned fiber web buffer and release mechanism 6.

[0031] The aforementioned fiber web conveying mechanism 4 includes a first guide roller 41 for the fiber web output curtain, a second guide roller 42 for the fiber web output curtain, a lifting guide roller 43 for the fiber web output curtain, a transition guide roller 44 for the fiber web output curtain, a tension adjusting roller 45 for the fiber web output curtain, and a fiber web output curtain 46. The first guide roller 41 and the second guide roller 42 for the fiber web output curtain correspond to the lower right side of the aforementioned fiber web buffer and release mechanism 6, and are rotatably supported between the opposing sides of the aforementioned pair of frames 1 in a state that is both spaced apart from each other and parallel to each other. Specifically, the front end and the rear end of the first guide roller 41 of the fiber web output curtain are rotatably supported on the opposing side of the pair of frames 1 by the first guide roller 411 shaft head support bearing seat fixed to the opposing side of the pair of frames 1. Similarly, the front end and rear end of the second guide roller 42 of the fiber web output curtain are rotatably supported on opposite sides of the pair of frames 1 by a second guide roller support bearing seat fixed to one side of the pair of frames 1. The fiber web output curtain lifting guide roller 43 is located below the aforementioned stretching roller 3 along its length. The front and rear ends of the fiber web output curtain lifting guide roller 43 are connected to the aforementioned buffer curtain roller reciprocating drive mechanism 7 via fiber web output curtain lifting guide roller shaft head 431 and by means of fiber web output curtain lifting guide roller shaft head support bearing seat 4311. In other words, the aforementioned buffer curtain roller reciprocating drive mechanism 7 is connected to the fiber web output curtain lifting guide roller 43. The fiber web output curtain transition guide roller 44 is located below the aforementioned fiber web buffer and release mechanism 6 and is rotatably supported between a pair of frames 1. Specifically, it is rotatably supported on the opposite side of a pair of frames 1 via fiber web output curtain transition guide roller shaft heads 441 located at the front and rear ends of the fiber web output curtain transition guide roller 44 and by means of fiber web output curtain transition guide roller shaft head support bearing seats fixed to the opposite side of a pair of frames 1. The fiber web output curtain tension adjusting roller 45 is positioned below and to the right of the fiber web output curtain transition guide roller 44, and is vertically adjustable between opposite sides of a pair of frames 1 via a sliding bearing seat. Specifically, the fiber web output curtain tension adjusting roller shaft head 451, which is formed at the front and rear ends of the fiber web output curtain tension adjusting roller 45, is rotatably mounted on the fiber web output curtain tension adjusting roller shaft head support bearing seat 452, which is vertically adjustable and positioned on opposite sides of a pair of frames 1. Figure 1The diagram also shows a spring device 453 for applying tension to the bearing seat 452 of the tension adjustment roller shaft of the aforementioned fiber web output curtain. The fiber web output curtain 46 (usually a leather curtain) is fitted onto the lower part of the aforementioned drafting roller 3, the fiber web buffer and release mechanism 6, the first guide roller 41 of the fiber web output curtain, the second guide roller 42 of the fiber web output curtain, the tension adjustment roller 45 of the fiber web output curtain, the transition guide roller 44 of the fiber web output curtain, and the lifting guide roller 43 of the fiber web output curtain; the aforementioned pressing mechanism 5 cooperates with the outward-facing side of the aforementioned fiber web output curtain 46.

[0032] See you later Figure 1 The aforementioned pressing mechanism 5 includes a first pressing roller 51 located on the left side of the aforementioned fiber web buffer and release mechanism 6 and a second pressing roller 52 located on the right side of the fiber web buffer and release mechanism 6. The first pressing roller 51 is positioned above the aforementioned output curtain drive roller 22 and drafting roller 3 in the longitudinal direction, supported by a first pressing roller shaft head 511 formed at its front and rear ends and rotatably supported on opposite sides of the aforementioned frame 1 by means of a first pressing roller shaft head support bearing seat. The second pressing roller 52 is positioned above the aforementioned fiber web output curtain first guide roller 41 and fiber web output curtain second guide roller 42 in the longitudinal direction, supported by a second pressing roller shaft head 521 formed at its front and rear ends and rotatably supported on opposite sides of the aforementioned frame 1 by means of a second pressing roller shaft head support bearing seat. The first and second pressing rollers 51 and 52 cooperate with the outward-facing side of the aforementioned fiber web output curtain 46. Since the pressing mechanism 5 includes first and second pressing rollers 51 and 52, it can realize the applicant's above-mentioned gradual compaction of fluffy fibers. Furthermore, since the first gripping point A and the second gripping point B are also gripping points for achieving drafting, during fiber movement, a section of the fiber web located between the first and second gripping points A and B is stretched.

[0033] The aforementioned fiber web buffering and releasing mechanism 6 includes an upper buffer roller 61, a lower buffer roller 62, a buffer curtain 63, and a pair of buffer curtain roller frames 64. The pair of buffer curtain roller frames 64 are slidably arranged on opposite sides of the aforementioned pair of machine frames 1, and are located in the middle of the width direction of the pair of machine frames 1 in a longitudinal state. The front end and rear end of the upper buffer roller 61 are rotatably supported between the upper ends of the pair of buffer curtain roller frames 64 via upper buffer roller shaft heads 611 and by means of upper buffer roller shaft head support bearing seats. The front end and rear end of the lower buffer roller 62 are rotatably supported on the buffer curtain via lower buffer roller shaft heads 621 and by means of lower buffer roller shaft head support bearing seats. At the lower end of the roller frame 64, the upper end of the buffer curtain 63 is fitted onto the upper roller 61 of the buffer curtain, and the lower end is fitted onto the lower roller 62 of the buffer curtain. The aforementioned fiber web output curtain 46 is fitted onto the left side of the aforementioned buffer curtain 63 at the position fitted onto the aforementioned stretching roller 3, and onto the right side of the aforementioned buffer curtain 63 at the position fitted onto the first guide roller 41 of the aforementioned fiber web output curtain. The fiber web output curtain 46 is fitted onto the lower part of the buffer curtain lower roller 62 in the longitudinal direction. The aforementioned buffer curtain roller reciprocating drive mechanism 7 is connected to the aforementioned pair of buffer curtain roller frames 64. The aforementioned fiber web output curtain lifting guide roller shaft head support bearing seat 4311 is slidably fitted onto the opposite side of the pair of machine frames 1.

[0034] The aforementioned buffer roller reciprocating drive mechanism 7 includes a drive sprocket shaft 71, a driven sprocket shaft 72, a pair of drive sprockets 73, a pair of driven sprockets 74, a pair of drive chains 75, and a pair of driven chains 76. The front and rear ends of the drive sprocket shaft 71 are rotatably supported between the lower parts of the aforementioned pair of frames 1 on opposite sides via drive sprocket shaft bearing seats. The driven sprocket shaft 72 is located above the drive sprocket shaft 71, and its front and rear ends are rotatably supported between the upper parts of the pair of frames 1 on opposite sides via driven sprocket shaft bearing seats. The pair of drive sprockets 73 are respectively fixed to the front and rear ends of the drive sprocket shaft 71, and the pair of driven sprockets 74 are respectively fixed to the front and rear ends of the driven sprocket shaft 72. The lower part of the aforementioned fiber web output curtain lifting guide roller shaft head support bearing seat 4311 is connected to one end of a pair of drive chains 75, and the other end of the pair of drive chains 75 is connected to the lower end of the aforementioned pair of buffer curtain roller frames 64. The middle part of the pair of drive chains 75 is respectively sleeved on a pair of drive sprockets 73. The upper part of the fiber web output curtain lifting guide roller shaft head support bearing seat 4311 is connected to one end of a pair of driven chains 76, and the other end of the pair of driven chains 76 is connected to the upper end of the aforementioned pair of buffer curtain roller frames 64. The middle part of the pair of driven chains 76 is respectively sleeved on a pair of driven sprockets 74. One of the aforementioned drive sprockets 73 is driven by a drive sprocket power mechanism set on one of the frames of the pair of frames 1. Specifically, the aforementioned drive sprocket power mechanism, preferably located on the outward-facing side of one of the pairs of frames 1, drives a power transmission sprocket added to the head of the drive sprocket shaft 71 extending outside the frame 1. The power transmission sprocket drives the drive sprocket shaft 71, which in turn drives a pair of drive sprockets 73, which in turn drive a pair of drive chains 75. Furthermore, since the power source of the drive sprocket power mechanism, controlled by a PLC (Programmable Logic Controller), such as a motor, has forward and reverse rotation capabilities, the aforementioned pair of buffer roller frames 64 can reciprocate up and down. It should be noted that if the aforementioned drive sprocket power mechanism is located on the inward-facing side of either of the pairs of frames 1, it should be considered an equivalent technical means.

[0035] In this embodiment, since the aforementioned pair of driving sprockets 73 and the pair of driven sprockets 74 are single-row sprockets, the aforementioned driving and driven chains 75 and 76 are also single-row chains. However, the pair of driving and driven sprockets 73 and 74 can also be double-row sprockets, and correspondingly, the driving and driven chains 75 and 76 can be double-row chains.

[0036] The applicant should clarify that if the aforementioned pair of driving and driven sprockets 73 and 74 are replaced with pulleys or timing belts, and the aforementioned pair of driving and driven chains 75 and 76 are replaced with drive belts or timing belts, then these should be considered equivalent technical means. Of course, in the aforementioned case, the pair of driving and driven sprocket shafts 71 and 72 can be appropriately referred to as a pair of driving and driven pulley shafts or a pair of driving and driven timing belt shafts, respectively.

[0037] See you later Figure 1 The aforementioned fiber web output curtain drive roller 22 is preferably rotatably connected to the output curtain drive roller drive mechanism located on the outward side of either of the aforementioned pair of frames 1; the aforementioned stretching roller 3 is preferably drive-connected to the stretching roller drive mechanism located on either of the aforementioned pair of frames 1.

[0038] The applicant should note that if the aforementioned output curtain drive roller mechanism and stretching roller drive mechanism are set on the inward-facing side of either of the two frames 1, they should be considered as equivalent technical means.

[0039] Please see Figure 2 And combined Figure 1 When the aforementioned pair of buffer roller frames 64 move upward, the U-shaped buffer cavity 47 formed between the aforementioned lower buffer roller 62 and the aforementioned fiber web output curtain 46 is in a state of releasing the fiber web. This state is... Figure 2 The state shown; when the pair of buffer roller frames 64 move downwards, the U-shaped buffer cavity 47 formed between the lower buffer roller 62 and the fiber web output curtain 46 is in a state of storing the fiber web, which is the state shown. Figure 1 The state shown.

[0040] Please stay tuned. Figure 1 and Figure 2 The applicant is Figure 1 and Figure 2 The diagram marks the first gripping point A, the second gripping point B, the third gripping point C, and the fourth gripping point D, which serve as the conveying channel. The first gripping point A and the second gripping point B are the core sections of the intermittent drafting process, achieving localized stretching. The second gripping point B and the third gripping point C are the clamping (i.e., "holding") conveying section, maintaining the density of the intermittently drafted fiber web and conveying it to the right to prevent retraction. From the third gripping point C and the fourth gripping point D onwards, the fiber web is released from the clamping section and stably output to the right or backwards, i.e., in the direction of the web-laying machine. The aforementioned first, second, third, and fourth gripping points A, B, C, and D can essentially be called engagement points.

[0041] exist Figure 1 and Figure 2The diagram illustrates four speeds: V1, V2, V3, and V4. V1 controls a stable, uniform input. V2 is the drafting speed, achieving localized drafting through speed control, with a draft ratio of V2 / V1. V3 is the lifting speed, matched to V2, and through the aforementioned buffering, achieves a stable, uniform output. V4 is the uniform output generated by the superposition of V2 and V3, matching the subsequent equipment, the aforementioned web-laying machine. When the web-laying trolley decelerates at both ends, the fiber web output by this invention is thin, and vice versa. Specifically, during the reciprocating motion of the web-laying trolley, the thick-thin fiber webs generated by this invention are laid accordingly, with the thinner fiber webs laid at the ends of the web-laying trolley when it reverses direction, i.e., at the edges of the transverse contour.

[0042] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and accurately realizes the technical effects described by the applicant in the above-mentioned technical effects column.

Claims

1. A fiber web shaping device with progressive compaction and periodic stretching functions, characterized in that: The system includes a pair of frames (1) arranged in a front-to-back configuration with a gap between them. The opposing sides of the pair of frames (1) are connected by a frame connecting beam to form a whole. In use, the pair of frames (1) is set on the floor between the web output mechanism (2) of the carding machine and the web laying machine. The right end of the web output mechanism (2) is rotatably supported between the opposing sides of the pair of frames (1). A drafting roller (3) is rotatably supported between the opposing sides of the pair of frames (1) at a position corresponding to the right side of the web output mechanism (2). A web conveying mechanism (4) and a pressing mechanism (5) are used to convey the web to the web laying machine. The mechanism (5) is rotatably disposed between the opposing sides of a pair of frames (1), and the pressing mechanism (5) is positioned above the fiber web output mechanism (2) and the drafting roller (3) and above the fiber web conveying mechanism (4) at the same position. A fiber web buffer and release mechanism (6) and a buffer roller reciprocating drive mechanism (7) are also disposed between the opposing sides of a pair of frames (1) and the buffer roller reciprocating drive mechanism (7) are also disposed between the opposing sides of the pair of frames (1) and connected to the fiber web conveying mechanism (4) and the fiber web buffer and release mechanism (6).

2. The fiber web shaping device with progressive compaction and periodic stretching functions according to claim 1, characterized in that: The fiber web output mechanism (2) includes a driven roller (21) of the fiber web output curtain, a driven roller (22) of the fiber web output curtain, and a fiber web output curtain (23). The driven roller shafts (211) at the front end and the rear end of the driven roller shafts (211) of the fiber web output curtain and the driven roller shafts (221) at the front end and the rear end of the driven roller shafts (221) of the fiber web output curtain are connected by a shaft shaft rotation support bearing seat arm. The right end of the shaft shaft rotation support bearing seat arm is fixed to the opposite side of the pair of frames (1). The left end of the fiber web output curtain (23) is sleeved on the driven roller (21) of the fiber web output curtain, and the right end is sleeved on the driven roller (22) of the fiber web output curtain.

3. The fiber web shaping device with progressive compaction and periodic stretching functions according to claim 2, characterized in that: The drafting roller (3) is located on the right side of the pair of frames (1) in the longitudinal direction corresponding to the active roller (22) of the fiber web output curtain, and is rotatably supported between the opposing sides of the pair of frames (1) by means of the drafting roller shaft head (31) at its front and rear ends and by means of the drafting roller shaft head support bearing seat; the fiber web conveying mechanism (4) is linked to the drafting roller (3), and the buffer curtain roller reciprocating drive mechanism (7) connected to the fiber web conveying mechanism (4) and the fiber web buffer and release mechanism (6) is located in the middle of the pair of frames (1) in the width direction between the opposing sides of the pair of frames (1); the pressing mechanism (5) is distributed on the left and right sides of the fiber web buffer and release mechanism (6).

4. The fiber web shaping device with progressive compaction and periodic stretching functions according to claim 3, characterized in that: The fiber web conveying mechanism (4) includes a first guide roller (41) for the fiber web output curtain, a second guide roller (42) for the fiber web output curtain, a lifting guide roller (43) for the fiber web output curtain, a transition guide roller (44) for the fiber web output curtain, a tension adjusting roller (45) for the fiber web output curtain, and a fiber web output curtain (46). The first guide roller (41) and the second guide roller (42) for the fiber web output curtain are located on the lower right side of the fiber web buffer and release mechanism (6), and are rotatably supported between the opposing sides of the pair of frames (1) in a state that is both spaced apart from each other and parallel to each other. The lifting guide roller (43) for the fiber web output curtain is located below the stretching roller (3) in the longitudinal direction. The front and rear ends of the lifting guide roller (43) for the fiber web output curtain are each supported by a lifting guide roller shaft head (431) and a bearing seat (431) supported by the lifting guide roller shaft head. 1) Connected to the buffer curtain roller reciprocating drive mechanism (7), the fiber cotton web output curtain transition guide roller (44) is located below the fiber cotton web buffer and release mechanism (6) and is rotatably supported between a pair of frames (1). The fiber cotton web output curtain tension adjustment roller (45) is located below the right side of the fiber cotton web output curtain transition guide roller (44) and is adjusted vertically between the opposing sides of the pair of frames (1) via a sliding bearing seat. The fiber cotton web output curtain (46) is sleeved on the lower part of the stretching roller (3), the fiber cotton web buffer and release mechanism (6), the first guide roller (41) of the fiber cotton web output curtain, the second guide roller (42) of the fiber cotton web output curtain, the tension adjustment roller (45) of the fiber cotton web output curtain, the transition guide roller (44) of the fiber cotton web output curtain, and the lifting guide roller (43) of the fiber cotton web output curtain. The pressing mechanism (5) cooperates with the outward-facing side of the fiber cotton web output curtain (46).

5. The fiber web shaping device with progressive compaction and periodic stretching functions according to claim 4, characterized in that: The pressing mechanism (5) includes a first pressing roller (51) located on the left side of the fiber web buffer and release mechanism (6) and a second pressing roller (52) located on the right side of the fiber web buffer and release mechanism (6). The first pressing roller (51) is positioned above the output curtain drive roller (22) and the drafting roller (3) in the longitudinal direction, and is rotatably supported on the frame (1) by means of a first pressing roller shaft head (511) formed at its front and rear ends and by means of a first pressing roller shaft head support bearing seat. Between the opposing sides, the second pressing roller (52) is positioned above the first guide roller (41) and the second guide roller (42) of the fiber web output curtain in the longitudinal direction, and is rotatably supported between the opposing sides of the frame (1) by means of the second pressing roller shaft head (521) formed at its front and rear ends and by means of the second pressing roller shaft head support bearing seat, wherein the first pressing roller (51), the second pressing roller (52) cooperate with the outward side of the fiber web output curtain (46).

6. The fiber web shaping device with progressive compaction and periodic stretching functions according to claim 5, characterized in that: The fiber web buffering and releasing mechanism (6) includes an upper buffer roller (61), a lower buffer roller (62), a buffer curtain (63), and a pair of buffer roller frames (64). The pair of buffer roller frames (64) are slidably arranged on opposite sides of the pair of frames (1) and are located in the middle of the width direction of the pair of frames (1) in a longitudinal state. The front end and rear end of the upper buffer roller (61) are rotatably supported between the upper ends of the pair of buffer roller frames (64) by means of the upper buffer roller shaft head (611) and the upper buffer roller shaft head support bearing seat. The front end and rear end of the lower buffer roller (62) are rotatably supported on the buffer roller frame by means of the lower buffer roller shaft head (621) and the lower buffer roller shaft head support bearing seat. (64) At the lower end, the upper end of the buffer curtain (63) is fitted on the upper roller (61) of the buffer curtain, and the lower end is fitted on the lower roller (62) of the buffer curtain. The fiber cotton web output curtain (46) is fitted on the stretching roller (3) and cooperates with the left side of the buffer curtain (63), and is fitted on the first guide roller (41) of the fiber cotton web output curtain and cooperates with the right side of the buffer curtain (63). The fiber cotton web output curtain (46) is fitted with the lower roller (62) of the buffer curtain below in the length direction. The reciprocating drive mechanism (7) of the buffer curtain roller is connected to the pair of buffer curtain roller frames (64). The lifting guide roller shaft head support bearing seat (4311) of the fiber cotton web output curtain is slidably fitted with the opposite side of the pair of frames (1).

7. The fiber web shaping device with progressive compaction and periodic stretching functions according to claim 6, characterized in that: The buffer roller reciprocating drive mechanism (7) includes a drive sprocket shaft (71), a driven sprocket shaft (72), a pair of drive sprockets (73), a pair of driven sprockets (74), a pair of drive chains (75), and a pair of driven chains (76). The front end and rear end of the drive sprocket shaft (71) are rotatably supported between the lower parts of the opposite sides of the pair of frames (1) via drive sprocket shaft bearing seats. The driven sprocket shaft (72) is located above the drive sprocket shaft (71), and its front end and rear end are rotatably supported between the upper parts of the opposite sides of the pair of frames (1) via driven sprocket shaft bearing seats. The pair of drive sprockets (73) are respectively fixed to the front end and rear end of the drive sprocket shaft (71), and the pair of driven sprockets (74) are respectively fixed to the front end and rear end of the driven sprocket shaft (72). At the rear end, the lower part of the fiber cotton web output curtain lifting guide roller shaft head support bearing seat (4311) is connected to one end of a pair of drive chains (75), and the other end of the pair of drive chains (75) is connected to the lower end of the pair of buffer curtain roller frames (64). The middle part of the pair of drive chains (75) is respectively sleeved on a pair of drive sprockets (73). The upper part of the fiber cotton web output curtain lifting guide roller shaft head support bearing seat (4311) is connected to one end of a pair of driven chains (76), and the other end of the pair of driven chains (76) is connected to the upper end of the pair of buffer curtain roller frames (64). The middle part of the pair of driven chains (76) is respectively sleeved on a pair of driven sprockets (74). One of the drive sprockets (73) is driven by a drive sprocket power mechanism set on one of the frames (1) of the pair of frames.

8. The fiber web shaping device with progressive compaction and periodic stretching functions according to claim 7, characterized in that: The pair of driving sprockets (73) and the pair of driven sprockets (74) are single-row or double-row sprockets. When the pair of driving sprockets (73) and the pair of driven sprockets (74) are single-row sprockets, the pair of driving chains (75) and the pair of driven chains (76) are single-row chains. When the pair of driving sprockets (73) and the pair of driven sprockets (74) are double-row sprockets, the driving chains (75) and the driven chains (76) are double-row chains.

9. The fiber web shaping device with progressive compaction and periodic stretching functions according to claim 1, characterized in that: The fiber web output curtain drive roller (22) is rotatably connected to the output curtain drive roller drive mechanism on the outward side of either of the pair of frames (1); the stretching roller (3) is drive-connected to the stretching roller drive mechanism on either of the pair of frames (1).

10. The fiber web shaping device with progressive compaction and periodic stretching functions according to claim 6, characterized in that: When the pair of buffer roller frames (64) move upward, the U-shaped buffer cavity (47) formed between the buffer lower roller (62) and the fiber web output curtain (46) is in a state of releasing the fiber web, and when the pair of buffer roller frames (64) move downward, the U-shaped buffer cavity (47) formed between the buffer lower roller (62) and the fiber web output curtain (46) is in a state of storing the fiber web.

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