A fiber web width on-line adjustment device

Abstract

This invention provides an online fiber width adjustment device, comprising: a first feed rod, a second feed rod, a transmission unit, and an operating unit. The width of the fiber bundle can be limited by the width between the first and second feed rods. The first and second feed rods can move simultaneously. The operating unit is connected to the transmission unit, which can simultaneously connect to both the first and second feed rods. The operating unit drives the transmission unit to move, thereby driving the first and second feed rods to move simultaneously, thus adjusting the fiber bundle width online. According to this invention, the fiber bundle width can be effectively adjusted online, achieving online width control of the dry-jet wet-spinning coagulation bath. It enables quantitative control of the fiber bundle width, reducing fiber bundle scattering, edge overlapping, and single filament drift in the coagulation bath, while also reducing the possibility of fuzz formation and roller entanglement.

Description

Technical Field

[0001] This invention relates to the field of carbon fiber precursor production and processing technology, specifically to an online fiber width adjustment device. Background Technology

[0002] During the production of carbon fiber precursor, fiber scattering and single filament escape inevitably occur as the fibers travel along the yarn path. Typically, positioning rods are used to constrain the fiber width for control. Current spinning production utilizes guide rods for fiber positioning and width control, but this is generally used primarily in the washing process and requires individual manual adjustment. During normal operation, due to the large number of spinning positions and limited operating range, adjustments are impossible, and it's difficult to accurately measure the consistency of fiber width and spacing at each spinning position, resulting in poor fiber uniformity and stability. The coagulation bath is a crucial step in the formation of nascent fibers, and the coagulation effect directly impacts the quality of the precursor. Without a fixed guide to limit the fiber bundle width, scattering and single filament escape are severe, affecting the coagulation and formation of nascent fibers, increasing the likelihood of fuzz, and directly impacting the coagulation effect. Therefore, quantitative control of fiber width is extremely important.

[0003] Because existing technologies do not have a fixed guide to limit the width of the filaments generated in the coagulation bath, resulting in serious problems such as filament scattering and single filaments drifting out, which affect the coagulation and generation of nascent fibers, this invention studies and designs an online fiber width adjustment device. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the technical problem that the filaments generated in the dry-jet wet spinning coagulation bath of the prior art have not been restricted by the fixed guide to limit the width of the filament bundle, resulting in serious phenomena such as filament bundle scattering and single filament drifting out, which affect the coagulation uniformity of the nascent fiber, thereby providing a fiber width online adjustment device.

[0005] To address the above problems, the present invention provides an online fiber width adjustment device, comprising:

[0006] The system comprises a first feed screw, a second feed screw, a transmission unit, and an operating unit. The width between the first feed screw and the second feed screw limits the width of the yarn bundle. The first feed screw and the second feed screw can move simultaneously. The operating unit is connected to the transmission unit, which can be simultaneously connected to both the first feed screw and the second feed screw. The operating unit can drive the transmission unit to move, thereby driving the first feed screw and the second feed screw to move separately and simultaneously, so as to adjust the width of the yarn bundle online.

[0007] In some embodiments, the system further includes a first support plate, a second support plate, and a third support plate. The first support plate and the second support plate are spaced apart, forming a space between them for the movement of the filament bundle. The third support plate spans between the first support plate and the second support plate, with one end connected to the first support plate and the other end connected to the second support plate. One end of the first feed rod is connected to the third support plate, and the other end extends into the space for the movement of the filament bundle. One end of the second feed rod is connected to the third support plate, and the other end extends into the space for the movement of the filament bundle. The first feed rod and the second feed rod can slide simultaneously on the third support plate.

[0008] In some embodiments, the third support plate is provided with a slide rail, on which a first slider and a second slider are engaged. Both the first slider and the second slider can slide along the direction of the slide rail. One end of the first feed rod is connected to the first slider, and one end of the second feed rod is connected to the second slider. The length direction of the slide rail is consistent with the width direction between the first support plate and the second support plate.

[0009] In some embodiments, the transmission unit includes a first connecting rod, a second connecting rod, a slidable lasso, and a width positioning shaft. One end of the first connecting rod is connected to the outer wall of the slidable lasso, and the other end is connected to the first slider. One end of the second connecting rod is connected to the outer wall of the slidable lasso, and the other end is connected to the second slider. The width positioning shaft passes through the interior of the slidable lasso, allowing the slidable lasso to slide along the axial direction of the width positioning shaft, thereby driving the first connecting rod and the second connecting rod to move simultaneously, and further driving the first slider and the second slider to slide simultaneously.

[0010] In some embodiments, the inner wall of the slidable lasso is provided with internal threads, and the outer wall of the width positioning shaft is provided with external threads. The width positioning shaft can be driven to rotate so that the slidable lasso moves along the axial direction of the width positioning shaft; thereby driving the first connecting rod and the second connecting rod to move simultaneously.

[0011] In some embodiments, a bearing is provided on the third support plate, and one end of the width positioning shaft passes through the bearing to be fixedly connected to the inner ring of the bearing. The one end of the width positioning shaft can rotate with the inner ring.

[0012] In some embodiments, the operating part is a handwheel, which is fixedly connected to the other end of the width positioning shaft so that the width positioning shaft can be driven to rotate by rotating the handwheel.

[0013] In some embodiments, the width positioning axis is provided with a scale so that the width between the first feed rod and the second feed rod can be obtained by corresponding to the scale.

[0014] In some embodiments, the first connecting rod is fixedly connected to the outer wall of the slidable lasso and the other end is fixedly connected to the first slider; one end of the second connecting rod is fixedly connected to the outer wall of the slidable lasso and the other end is fixedly connected to the second slider.

[0015] One end of the first feed rod is fixedly connected to the first slider, and one end of the second feed rod is fixedly connected to the second slider.

[0016] In some embodiments, the first connecting rod extends from the first end face of the third support plate to the second end face, the second connecting rod extends from the first end face of the third support plate to the second end face, and the first slider and the second slider are simultaneously disposed on the second end face.

[0017] The fiber width online adjustment device provided by the present invention has the following beneficial effects:

[0018] This invention utilizes the movement of first and second feed screws to effectively limit the width of the fiber bundle. The operating unit drives the transmission unit to output power, which in turn drives the first and second feed screws, thereby effectively adjusting the fiber bundle width online. This achieves online width control of the dry-jet wet-spinning coagulation bath, enabling quantitative control of the fiber bundle width and allowing for real-time online adjustment based on the feeding conditions. This reduces issues such as fiber bundle scattering, edge overlapping, and single filament drift in the coagulation bath, while also lowering the likelihood of fuzz formation and roller entanglement, thus improving the uniformity of nascent fiber coagulation. Furthermore, the width adjustment operation is simple and easy to learn, facilitating long-term use on the production line. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the fiber width online adjustment device of the present invention;

[0020] Figure 2 This is a simplified diagram of the movable structure of the fiber width online device of the present invention. Figure 1 (View from above).

[0021] The reference numerals in the attached figures are as follows:

[0022] 1. Width positioning shaft; 2. Sliding lasso; 31. First connecting rod; 32. Second connecting rod; 41. First thread feeder; 42. Second thread feeder; 51. First slider; 52. Second slider; 6. Third support plate; 71. First support plate; 72. Second support plate; 8. Bearing; 9. Handwheel; 10. Slide rail; 11. Fiber bundle. Detailed Implementation

[0023] This invention addresses the field of carbon fiber, where the width of the produced filaments cannot be controlled, leading to filament scattering and drifting, which affects the uniformity of the coagulation of the nascent fibers. The invention provides an online fiber width adjustment device, and related structures in other fields are not applicable to this field.

[0024] like Figure 1-2 As shown, the fiber width online adjustment device of the present invention includes:

[0025] The first feed rod 41, the second feed rod 42, the transmission unit, and the operating unit limit the width of the fiber bundle 11 by the width between the first feed rod 41 and the second feed rod 42. The first feed rod 41 and the second feed rod 42 can move simultaneously. The operating unit is connected to the transmission unit, and the transmission unit can be connected to both the first feed rod 41 and the second feed rod 42 simultaneously. The operating unit can drive the transmission unit to move, thereby driving the first feed rod 41 and the second feed rod 42 to move separately and simultaneously, so as to adjust the width of the fiber bundle 11 online.

[0026] This invention utilizes the movement of first and second feed screws to effectively limit the width of the fiber bundle. The operating unit drives the transmission unit to output power, which in turn drives the first and second feed screws, thereby effectively adjusting the fiber bundle width online. This achieves online width control of the dry-jet wet-spinning coagulation bath, enabling quantitative control of the fiber bundle width and allowing for real-time online adjustment based on the feeding conditions. This reduces issues such as fiber bundle scattering, edge overlapping, and single filament drift in the coagulation bath, while also lowering the likelihood of fuzz formation and roller entanglement, thus improving the uniformity of nascent fiber coagulation. Furthermore, the width adjustment operation is simple and easy to learn, facilitating long-term use on the production line.

[0027] This invention provides an online fiber width adjustment device suitable for online width control in dry-jet wet spinning coagulation baths. A width positioning shaft 1 with graduations passes through a sliding loop 2, and its front end is fixed to a bearing 8 inside a third support plate 6. First and second connecting rods connect the sliding loop 2 and the first and second sliders. First and second feeding rods are fixedly connected to the first and second sliders. The first and second sliders can slide back and forth on the crossbeam of the third support plate. The third support plate 6 is fixedly connected to the cross support plate (first and second support plates). A handwheel 9 is fixedly connected to the width positioning shaft 1 with graduations for easy operation.

[0028] The wire feed rod of the present invention may be made of stainless steel, and the surface of the rod may be polished or chrome-plated, with a surface friction coefficient of 0.01-0.20.

[0029] In some embodiments, the system further includes a first support plate 71, a second support plate 72, and a third support plate 6. The first support plate 71 and the second support plate 72 are spaced apart, forming a space for the movement of the filament bundle. The third support plate 6 spans between the first support plate 71 and the second support plate 72, with one end connected to the first support plate 71 and the other end connected to the second support plate 72. One end of the first thread guide rod 41 is connected to the third support plate 6, and the other end extends into the space for the movement of the filament bundle. One end of the second thread guide rod 42 is connected to the third support plate 6, and the other end extends into the space for the movement of the filament bundle. Both the first thread guide rod 41 and the second thread guide rod 42 can slide on the third support plate 6.

[0030] The present invention can form a space for the movement of fiber bundles through the first and second support plates, and a third support plate is erected across the first and second support plates. The first and second feed rods can be set through the third support plate, and the first and second feed rods can slide on the third support plate. The width of the limiting fiber bundle can be adjusted online through the space between the first and second feed rods.

[0031] In some embodiments, a slide rail 10 is provided on the third support plate 6, and a first slider 51 and a second slider 52 are engaged on the slide rail 10. Both the first slider 51 and the second slider 52 can slide along the direction of the slide rail 10. One end of the first wire feed rod 41 is connected to the first slider 51, and one end of the second wire feed rod 42 is connected to the second slider 52. The length direction of the slide rail 10 is consistent with the width direction between the first support plate 71 and the second support plate 72. The present invention also achieves the effect of sliding the first and second wire feed rods along the width direction of the third support plate by sliding the two sliders on the slide rail, thereby realizing effective online adjustment of the width of the limiting wire bundle.

[0032] In some embodiments, the transmission unit includes a first connecting rod 31, a second connecting rod 32, a slidable lasso 2, and a width positioning shaft 1. One end of the first connecting rod 31 is connected to the outer wall of the slidable lasso 2, and the other end is connected to the first slider 51. One end of the second connecting rod 32 is connected to the outer wall of the slidable lasso 2, and the other end is connected to the second slider 52. The width positioning shaft 1 passes through the interior of the slidable lasso 2, so that the slidable lasso 2 can slide along the axial direction of the width positioning shaft 1, thereby driving the first connecting rod 31 and the second connecting rod 32 to move simultaneously, and in turn driving the first slider 51 and the second slider 52 to slide simultaneously. This is a preferred structural form of the transmission part of the present invention. The width positioning shaft and the sliding loop can be fitted together. The sliding loop can move in the axial direction of the width positioning shaft by rotating the width positioning shaft. The outer wall of the sliding loop is connected to the first and second connecting rods, which are connected to the first and second sliders. Therefore, the sliding loop can be driven to move in the axial direction by rotating the width positioning shaft, thereby driving the first and second connecting rods to move, driving the first and second sliders to move, realizing the driving movement of the first and second feed rods, and finally realizing the online adjustment of the width of the fiber bundle.

[0033] This invention uses a width positioning shaft with graduations to determine the width corresponding to the number of spinning processes, thereby improving the uniformity of the width of the filament bundle.

[0034] The width positioning shaft with graduations has threaded threads (i.e., external threads). By turning the handwheel, the sliding lasso 2 can move back and forth on the width positioning shaft 1 with graduations, so that the width of the wire bundle can be precisely controlled.

[0035] In some embodiments, the inner wall of the sliding lasso 2 is provided with internal threads, and the outer wall of the width positioning shaft 1 is provided with external threads. The width positioning shaft 1 can be driven to rotate so that the sliding lasso 2 moves along the axial direction of the width positioning shaft 1; thereby driving the first connecting rod 31 and the second connecting rod 32 to move simultaneously. This is a further preferred structural form of the sliding lasso and width positioning shaft of the present invention. Through the cooperation structure of internal and external threads, the sliding lasso can be effectively driven to move along the axial direction of the width positioning shaft by the rotation of the width positioning shaft.

[0036] In some embodiments, a bearing 8 is provided on the third support plate 6, and one end of the width positioning shaft 1 passes through the bearing 8 to be fixedly connected to the inner ring of the bearing 8. The one end of the width positioning shaft 1 can rotate with the inner ring. The present invention also uses a bearing provided on the third support plate to support and connect one end of the width positioning shaft, thereby enabling the width positioning shaft to drive the inner ring of the bearing to rotate.

[0037] The bearing 8 on the third support plate 6 can support the free rotation of the width positioning shaft 1 with scale.

[0038] The present invention discloses an online fiber width adjustment device, which has grooves (i.e., the space between the first and second support plates) on the cross support plates (first support plate 71 and second support plate 72) to facilitate connection with a coagulation bath. (Each individual coagulation bath is a cuboid, and the tanks are separated by steel plates.) The coagulation bath is located at the lower end and is used to store coagulation liquid to solidify the sprayed fine stream.

[0039] In some embodiments, the operating part is a handwheel 9, which is fixedly connected to the other end of the width positioning shaft 1, so that the width positioning shaft 1 can be driven to rotate by rotating the handwheel 9. This is a preferred structural form of the operating part of the present invention. The handwheel can be manually driven to rotate by the operator, thereby driving the width positioning shaft to rotate effectively, thereby controlling and adjusting the width of the fiber bundle.

[0040] In some embodiments, the width positioning shaft 1 is provided with a scale so that the width between the first feed rod 41 and the second feed rod 42 can be obtained through the scale. The present invention also allows for effective observation of the width between the first and second feed rods through the scale on the width positioning shaft, thereby effectively controlling the width of the fiber bundle according to the scale size.

[0041] More preferably, the end face of the slidable lasso 2 has a relative position to the width positioning shaft 1, and the scale corresponding to the relative position can correspond to different widths between the first thread feeder 41 and the second thread feeder, so as to control the width of the yarn bundle by controlling the corresponding scale.

[0042] In some embodiments, the first connecting rod 31 is fixedly connected to the outer wall of the slidable lasso 2 and the other end is fixedly connected to the first slider 51; one end of the second connecting rod 32 is fixedly connected to the outer wall of the slidable lasso 2 and the other end is fixedly connected to the second slider 52.

[0043] One end of the first feed rod 41 is fixedly connected to the first slider 51, and one end of the second feed rod 42 is fixedly connected to the second slider 52.

[0044] This is the preferred connection method between the first connecting rod, the sliding lasso, and the first slider of the present invention. The three are fixedly connected, and the movement of the sliding lasso can drive the first slider to move. The first connecting rod, the sliding lasso, and the first slider are fixedly connected, and the movement of the sliding lasso can drive the second slider to move, thereby realizing the adjustment of the width between the first and second feeding rods, and ultimately realizing the adjustment and control of the width of the fiber bundle.

[0045] In some embodiments, the first connecting rod 31 extends from the first end face of the third support plate 6 to the second end face, and the second connecting rod 32 extends from the first end face of the third support plate 6 to the second end face. The first slider 51 and the second slider 52 are simultaneously disposed on the second end face. This is a further preferred structural form of the present invention, such that the first connecting rod and the second connecting rod pass through the third support plate, thereby driving the first and second sliders to move on the slide rail.

[0046] In some embodiments, the first slider 51 and the second slider 52 are symmetrically arranged on the slide rail 10. The fiber width online adjustment device is used to adjust the width of the nascent fiber in the dry-jet wet spinning coagulation bath. The distance between the first feed rod 41 and the second feed rod 42 should be set to maximize the width without any single filament spilling out, thus avoiding filament bundle stacking. Preferably, the device is placed at any position between the spinneret side and the bath outlet side. Preferably, the distance from the spinneret side to the bath outlet side is ≤1.5, more preferably, the ratio of the distances is 0.5-1.0. The first slider and the second slider of the present invention are symmetrically arranged with respect to the width positioning axis, which enables the movement of the width positioning axis to simultaneously drive the connecting rod slider to move in the same or different directions. The width between them is twice the distance from the width positioning axis, which can improve the accuracy of the width limit adjustment and improve the uniformity of the filament bundle limit.

[0047] See Figure 1 After the coagulation bath filament bundle is fed, place the cross support plate on the coagulation bath partition, insert it into the groove and fix it, rotate the handwheel to the specified scale, and drive the feeding rod to constrain the width of the filament bundle.

[0048] By implementing this system, the filament bundle operates without obstruction, significantly reducing the occurrence of roller entanglement, improving the stability of the raw filament production process, and ensuring quantitative control of the filament bundle width. Furthermore, it allows for real-time online adjustment based on the filament feed, reducing issues such as filament bundle scattering, edge overlapping, and single filament slippage in the coagulation bath. The width adjustment is also simple and easy to learn, facilitating long-term stable use of the production line.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A fiber width online adjustment device, characterized in that: include: The first feed screw (41), the second feed screw (42), the transmission part, and the operating part limit the width of the fiber bundle (11) by the width between the first feed screw (41) and the second feed screw (42). The first feed screw (41) and the second feed screw (42) can move simultaneously. The operating part is connected to the transmission part. The transmission part can be connected to the first feed screw (41) and the second feed screw (42) simultaneously. The operating part can drive the transmission part to move, thereby driving the first feed screw (41) and the second feed screw (42) to move separately and simultaneously, so as to adjust the width of the fiber bundle (11) online. It also includes a first support plate (71), a second support plate (72) and a third support plate (6). The first support plate (71) and the second support plate (72) are spaced apart to form a space for the movement of the filament bundle. The third support plate (6) spans between the first support plate (71) and the second support plate (72). One end of the third support plate (6) is connected to the first support plate (71) and the other end is connected to the second support plate (72). One end of the first threading rod (41) is connected to the third support plate (6) and the other end extends into the space for the movement of the filament bundle. One end of the second threading rod (42) is connected to the third support plate (6) and the other end extends into the space for the movement of the filament bundle. The first threading rod (41) and the second threading rod (42) can slide simultaneously on the third support plate (6).

2. The fiber width online adjustment device according to claim 1, characterized in that: The third support plate (6) is provided with a slide rail (10), on which a first slider (51) and a second slider (52) are mounted. Both the first slider (51) and the second slider (52) can slide along the direction of the slide rail (10). One end of the first thread feeder (41) is connected to the first slider (51), and one end of the second thread feeder (42) is connected to the second slider (52). The length direction of the slide rail (10) is consistent with the width direction between the first support plate (71) and the second support plate (72).

3. The fiber width online adjustment device according to claim 2, characterized in that: The transmission unit includes a first connecting rod (31), a second connecting rod (32), a sliding lasso (2), and a width positioning shaft (1). One end of the first connecting rod (31) is connected to the outer wall of the sliding lasso (2), and the other end is connected to the first slider (51). One end of the second connecting rod (32) is connected to the outer wall of the sliding lasso (2), and the other end is connected to the second slider (52). The width positioning shaft (1) passes through the interior of the sliding lasso (2), so that the sliding lasso (2) can slide along the axial direction of the width positioning shaft (1), thereby driving the first connecting rod (31) and the second connecting rod (32) to move simultaneously, and thus driving the first slider (51) and the second slider (52) to slide simultaneously.

4. The fiber width online adjustment device according to claim 3, characterized in that: The inner wall of the sliding lasso (2) is provided with an internal thread, and the outer wall of the width positioning shaft (1) is provided with an external thread. The width positioning shaft (1) can be driven to rotate so that the sliding lasso (2) moves along the axial direction of the width positioning shaft (1); thereby driving the first connecting rod (31) and the second connecting rod (32) to move simultaneously.

5. The fiber width online adjustment device according to claim 3, characterized in that: The third support plate (6) is provided with a bearing (8), and one end of the width positioning shaft (1) is inserted into the bearing (8) to be fixedly connected with the inner ring of the bearing (8). One end of the width positioning shaft (1) can rotate with the inner ring.

6. The fiber width online adjustment device according to claim 5, characterized in that: The operating part is a handwheel (9), which is fixedly connected to the other end of the width positioning shaft (1) so that the width positioning shaft (1) can be driven to rotate by the rotation of the handwheel (9).

7. The fiber width online adjustment device according to claim 3, characterized in that: The width positioning shaft (1) is provided with a scale so that the width between the first wire feed rod (41) and the second wire feed rod (42) can be obtained through the scale.

8. The fiber width online adjustment device according to any one of claims 3-7, characterized in that: The first connecting rod (31) is fixedly connected to the outer wall of the sliding lasso (2) and the other end is fixedly connected to the first slider (51). One end of the second connecting rod (32) is fixedly connected to the outer wall of the sliding lasso (2) and the other end is fixedly connected to the second slider (52). One end of the first feed screw (41) is fixedly connected to the first slider (51), and one end of the second feed screw (42) is fixedly connected to the second slider (52).

9. The fiber width online adjustment device according to any one of claims 3-7, characterized in that: The first connecting rod (31) passes through the first end face of the third support plate (6) to the second end face, and the second connecting rod (32) passes through the first end face of the third support plate (6) to the second end face. The first slider (51) and the second slider (52) are simultaneously disposed on the second end face. Within the projection plane of the third support plate (6), the first slider (51) and the second slider (52) are symmetrically arranged on the slide rail (10) relative to the width positioning axis (1).

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