Differential warp beam type clockwork let-off device and method for multi-heald eye loom

Abstract

The invention provides a differential warp beam type clockwork let-off device and method for a multi-heald eye loom, and relates to the technical field of textile machinery. According to the device, a traditional large warp beam is divided into a plurality of independent differential warp beam units, and each unit is mainly composed of a winding reel and a clockwork spring coil spring rotating disc and can independently respond to tension changes. A pure mechanical structure is adopted, when warps are stressed and straightened, the winding reel unwinds the warps and enables the clockwork coil spring to store energy, when the warps are loosened, the coil spring drives the winding reel to take up the yarns, and self-adaptive constant tension control is achieved. The let-off method is passive and is driven by the traction force of a cloth fell without a motor and a sensor. The device is compact in structure and low in cost, can be flexibly adapted to weaving of multi-layer and high-density three-dimensional fabrics, effectively solves the problems of uneven interlayer tension, slow response and the like, reduces yarn damage, and provides key technical support for industrialization of high-thickness inorganic fiber fabrics.

Description

Technical Field

[0001] This invention relates to the field of textile machinery and equipment technology, specifically to a differential warp beam type spring feeding device and method for multi-harness looms, and more particularly to a constant tension warp feeding device and method suitable for high-performance inorganic fiber three-dimensional weaving. Background Technology

[0002] In the field of high-end composite material manufacturing, high-performance inorganic fibers such as carbon fiber, glass fiber, and basalt fiber, with their superior specific strength, specific modulus, and fatigue resistance, have become indispensable core reinforcing materials for high-end equipment in aerospace, new energy, and other fields. However, traditional thin-layer laminated fabrics are inherently prone to delamination due to weak interlayer interfaces, severely restricting their application in high-reliability components. To fundamentally overcome this bottleneck, multi-layer, high-thickness three-dimensional fabrics have been widely developed and applied as key prefabricants. Through the overall interweaving and interlacing of fibers in three-dimensional space, they form an integrated continuous network, completely eliminating the problem of weak interlayer interfaces. This significantly improves the integrity, delamination resistance, and damage tolerance of composite materials, making it an inevitable choice for achieving lightweight, highly reliable composite structures.

[0003] However, the weaving process of three-dimensional fabrics faces far more complex tension control challenges than two-dimensional weaving. Especially when using multi-layer sheath looms for three-dimensional weaving, the double-stroke jacquard technology of the jacquard device to achieve multiple independent weaving sheaths places more stringent requirements on warp tension control, mainly in the following three aspects: First, difficulty in interlayer tension coordination: Due to the large number of warp layers and complex spatial configuration in three-dimensional fabrics, the movement paths and stress states of the warp yarns in each layer have inherent differences. In multi-layer sheath weaving, the warp yarns in different layers need to maintain different constant tensions, and the required warp feed amount is also different. Traditional warp feed devices cannot achieve this layered tension control, resulting in inconsistent warp tension between layers. Second, insufficient dynamic warp feed response within a single layer: Even within a single layer, due to the interlacing of warp yarns during sheathing movement, the warp feed demand dynamically changes with the weave sheath shape. Traditional devices cannot achieve instantaneous and differentiated warp feeding, resulting in uneven warp tension within the layer. Some yarns become overly taut, leading to stress concentration, while others become loose, causing unclear weft insertion and ultimately affecting the fabric surface uniformity. Thirdly, fiber characteristics exacerbate the control difficulty: high-performance inorganic fibers have high modulus, high brittleness, and extremely low elongation, making them exceptionally sensitive to tension fluctuations and mechanical friction. In a multi-layered open weaving environment, any slight tension unevenness or instantaneous impact can easily cause fiber surface damage, pilling, or even breakage.

[0004] The aforementioned problems are intertwined, ultimately leading to a series of quality issues such as unclear weft insertion, failed weft insertion, and uneven fabric density, severely hindering the improvement of the industrialization level of high-performance inorganic fiber three-dimensional fabrics. Existing warp feeding technologies cannot effectively meet the unique collaborative warp feeding requirements of multi-layer sheath looms, which demand "multi-path, variable tension, and independent controllability." Traditional warp beam feeding uses a collective control mode of "one beam, multiple yarns," which cannot achieve independent control of individual warp yarns; while yarn frame feeding offers flexible path control, the equipment is bulky, and its passive tension control mechanism is slow to respond, unable to provide constant tension, and cannot meet the high-precision requirements. Subsequent research, such as Chinese patents CN102877195A and CN113322567A, attempted to achieve tension compensation through electromechanical integration, but these systems rely on complex components such as motors, sensors, and transmission mechanisms, resulting in high costs and cumbersome structures, making it difficult to meet the special needs of multi-layer sheath looms in the mass production and high-reliability production of thick, multi-layer fabrics.

[0005] In view of this, it is necessary to study a compact, cost-controllable warp feeding device and method that can achieve independent, rapid, and constant tension control of each layer of warp yarns, in order to overcome the key bottleneck in the development of high-performance inorganic fiber three-dimensional weaving technology. Summary of the Invention

[0006] In view of the technical problems existing in the background art, the present invention provides a differential warp beam type spring feeding device and method for multi-harness looms. It divides the traditional large warp beam into numerous independently operable differential warp beam units (composed of a combination of a winding bobbin and a spring coiling turntable), forming a distributed control architecture. It perfectly combines the ingenious design of the mechanical structure with the deep needs of textile processes. Through the innovative concept of "differential warp beam," a purely mechanical adaptive control mechanism, modular spatial layout, and the systematic integration of passive warp feeding technology, it constructs a complete high-performance inorganic fiber three-dimensional weaving warp feeding solution. This device not only solves industry technical problems such as multi-layer tension collaborative control, large and complex equipment, and severe fiber damage that cannot be overcome by existing technologies, but also provides reliable technical support for the industrialization of three-dimensional weaving of high-performance inorganic fibers such as carbon fiber and glass fiber, and has significant application value in high-end equipment manufacturing fields such as aerospace and new energy. This design abandons the traditional motor and complex transmission mechanism, realizing the synchronous movement and constant tension control of multiple warp yarns through a purely mechanical means. It has a rapid response speed, low fiber wear, compact structure, and convenient installation, significantly reducing the space occupation and manufacturing cost of the equipment. By applying this spring-loaded warp feeding system, problems such as warp loosening, wear, and breakage caused by tension fluctuations during the weaving of high-performance inorganic fibers (such as carbon fiber and glass fiber) can be effectively solved. The constant tension control provided by this device is particularly suitable for protecting the integrity of brittle inorganic fibers, providing key technical support for the successful weaving of complex, high-thickness inorganic fiber fabrics with uniform quality, and strongly promoting the application of such high-performance materials in a wider range of fields.

[0007] In a first aspect, embodiments of the present invention provide a differential warp beam type spring feeding device for a multi-harness loom, comprising multiple independently arranged differential warp beam units in a predetermined structure; each differential warp beam unit includes: A bobbin is used to wind warp yarns. A spring-winding turntable is connected to the winding drum via a transmission mechanism. When the warp yarn is stretched taut, the spring-loaded turntable rotates and stores energy along with the forward-rotating bobbin. When the warp yarn is relaxed without external force, the potential energy is released through the restoring torque to drive the bobbin to rotate in the opposite direction to take in the yarn, thus realizing adaptive adjustment and constant control of the warp yarn tension.

[0008] As a further improvement of the present invention, the mainspring coiling disk includes a mainspring coiling spring, a base, an internal gear, and a rotatable mainspring rotating disk; The internal gear is embedded inside the chassis and fixed synchronously; the outer end of the spring coil is engaged in the groove of the internal gear, and the inner end is fixed in the inner groove of the spring rotating disk. When the mainspring rotating disk is driven to rotate by the tension of the warp yarn, it causes the mainspring coil spring to coil and store elastic potential energy. As the mainspring rotating disk continues to rotate, the outer ring of the mainspring coil spring is released from one of the slots of the internal gear and quickly enters the next adjacent slot under its own rebound force, while releasing some potential energy. This cycle repeats to provide continuous tension and recovery force for the warp yarn, thereby maintaining constant tension.

[0009] As a further improvement of the present invention, the winding drum and the spring coil turntable are connected by a gear transmission device. The gear transmission device includes a driven gear fixed on the winding drum and a transmission gear fixed on the mainspring rotating disk. The driven gear and the transmission gear mesh with each other to realize the synchronous rotation of the winding drum and the mainspring rotating disk.

[0010] As a further improvement of the present invention, the differential warp beam unit also includes a guide roller for guiding the warp yarn drawn out from the winding bobbin and a combing reed for combing the warp yarn. The yarn guide rollers include an upper yarn guide roller and a lower yarn guide roller arranged symmetrically. The yarn separating reed is located between the two sets of yarn guide rollers. After the warp yarn is drawn out from the winding bobbin, it is guided by the yarn guide rollers, separated by the yarn separating reed, and then output.

[0011] As a further improvement of the present invention, the differential warp beam unit also includes a baffle for mounting the clock spring turntable; The baffles are arranged alternately up and down along the warp feed direction, so that the warp yarns drawn out from each winding bobbin form a height difference.

[0012] As a further improvement of the present invention, the differential warp shaft unit also includes a pressure spring; The pressure spring contacts the winding drum to control the engagement state between the winding drum and the mainspring coil turntable.

[0013] As a further improvement of the present invention, the differential warp beam type spring feeding device for multi-harness looms includes a mounting frame; the mounting frame is a modular frame formed by splicing square steel tubes. The baffle is fixed to the square steel tube, and the two sides of the square steel tube are symmetrically arranged with the same differential warp axis units.

[0014] As a further improvement of the present invention, a large double-ended threaded shaft and a small double-ended threaded shaft are installed on the baffle; The winding drum is limited and fitted onto the optical axis of the large double-headed toothed shaft, and the yarn guide roller is limited and fitted onto the optical axis of the small double-headed toothed shaft; the pressure spring is fitted onto the large double-headed toothed shaft, and one end is in contact with the winding drum.

[0015] Secondly, embodiments of the present invention provide a differential warp beam type spring feeding method, which uses the aforementioned differential warp beam type spring feeding device for multi-harness looms to achieve warp feeding, including the following steps: S1, the baffles of multiple differential warp beam units are arranged alternately up and down along the warp feed direction, and a preset number of warp yarns are wound side by side on the winding drum; S2, synchronously draws out the warp yarns on each bobbin, passes them sequentially around the corresponding upper guide roller, through the yarn separating reed, and around the corresponding lower guide roller, to guide and comb them, so that the warp yarns are evenly arranged and have independent paths; S3, after all the warp yarns are gathered, they pass through the large steel reed and are passively fed by the traction force in the direction of the weave opening; S4: When the warp yarn is stretched taut, the bobbin rotates forward to release the yarn, and the spring-loaded turntable stores energy; when the warp yarn is relaxed without external force, the spring-loaded turntable drives the bobbin to rotate in reverse to take in the yarn, maintaining constant warp yarn tension.

[0016] As a further improvement of the present invention, the vertical spacing between adjacent baffles is 1~3mm, and the longitudinal spacing between different rows of baffles is 120~180mm. The warp yarns drawn from a single bobbin are arranged horizontally in the guide section of the yarn guide roller. The warp yarn arrangement density on each bobbin is 0~30 yarns / cm, and the arrangement density after being guided by the yarn guide roller is 0~25 yarns / cm. The warp yarn is made of carbon fiber, glass fiber, or basalt fiber; The differential warp beam type spring feeding method is applicable to the weaving of 3- to 60-layer high-thickness three-dimensional fabrics.

[0017] Beneficial effects: The differential warp beam type spring feeding device for multi-harness looms provided by this invention has the following technical advantages: 1. Significantly reduce equipment costs and space requirements: In response to the problems of high cost and large footprint of existing motor-driven or complex mechanical warp feeding devices, this invention adopts a purely mechanical passive warp feeding structure, which completely eliminates the need for motors, sensors and electrical control systems. This not only significantly reduces manufacturing costs, but also makes the overall structure more concentrated and the footprint significantly smaller, making installation and maintenance simpler.

[0018] 2. Achieving adaptive and constant warp tension control: To solve the problem of easy attenuation and loosening of warp tension, this invention utilizes the periodic winding and unwinding mechanism of the spring coil and internal gear, which can instantly rebound and tighten when the yarn is slack, achieving rapid response and continuous and stable tension control.

[0019] 3. Adapting to complex three-dimensional weaving process requirements: In order to overcome the limitation of traditional warp feeding that cannot independently control the yarn, this invention adopts a modular differential warp beam architecture and baffles arranged in an alternating manner, which supports independent management of single-layer yarns and can flexibly adapt to the weaving needs of multi-layer, high-density and complex three-dimensional fabrics.

[0020] 4. Effectively reduces yarn damage: Addressing the issue of easy wear and tear on inorganic fibers, the system guides and combs the yarn through the guide bobbin and the separating reed, significantly reducing yarn friction and entanglement, lowering the breakage rate, ensuring clear slits, and improving weaving quality and efficiency.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0022] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0023] Figure 1 This is a schematic diagram of the differential warp beam type spring feeding device for a multi-harness loom provided in an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the operating principle of the differential warp beam type spring feeding device for multi-harness looms provided in this embodiment of the invention; Figure 3 This is a schematic diagram of the movement of the spring coil spring in the internal gear of the differential warp beam type spring feeding device for a multi-harness loom provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the installation of the spring coiling turntable of the differential warp beam type spring feeding device for a multi-harness loom provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the positioning of the spring coiling turntable of the differential warp beam type spring feeding device for a multi-harness loom provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the warp winding direction of the differential warp beam type spring feeding device for a multi-harness loom provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the installation of a differential warp beam type spring feeding device for a multi-harness loom provided in an embodiment of the present invention.

[0024] Explanation of reference numerals in the attached figures: 11. Winding bobbin; 12. Pressure spring; 13. Clockwork spring turntable; 14. Upper yarn guide roller; 15. Yarn separating reed; 16. Lower yarn guide roller; 17. Baffle; 18. Square steel tube; 19. Large steel reed; 21. Chassis; 22. Internal gear; 23. Spring coil spring; 24. Spring rotating disc; 25. Outer retaining ring; 27. Transmission gear; 26 / 28. Fixing screws; 31. Large double-ended toothed shaft; 32. Driven gear; 33 / 37. Small double-ended toothed shaft; 35. Clamping block; 36. Set screw; 34 / 38. Limit nut. Detailed Implementation

[0025] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0027] In the description of the embodiments of this invention, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this invention, "multiple" means two or more, unless otherwise explicitly defined.

[0028] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0029] In the description of the embodiments of this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] In the description of the embodiments of the present invention, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0031] In the description of the embodiments of the present invention, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0032] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0033] To address the challenges of tension control in high-performance inorganic fiber three-dimensional weaving, and the limitations of traditional warp feeding techniques that employ a "one-axis, multiple-yarn" collective control mode, which fails to achieve independent and precise control of warp yarns in each layer of multi-layer fabrics, this invention provides a differential warp beam type spring-driven warp feeding device and method for multi-harness looms. Specifically designed for multi-layer sheath looms that achieve multiple sheaths through double-stroke jacquard weaving using a jacquard device, this invention utilizes the periodic winding and unwinding motion of a spring in the internal gear groove to achieve controllable unwinding and automatic rewinding of warp yarns in each layer, thus providing a continuous and adaptive layered tension adjustment mechanism. This invention introduces the innovative concept of a "differential warp beam," decomposing the traditional large warp beam into several independent differential warp beam units (a combination of a winding bobbin and a spring-driven turntable). Each unit can independently respond to changes in warp tension, achieving independent layered control and overcoming the limitations of traditional "one-axis, multiple-yarn" collective control. It employs a purely mechanical tension regulation mechanism, utilizing the meshing transmission between a spring and an internal gear. When the warp yarn is stretched taut, the bobbin releases the yarn, allowing the spring to store energy. When the warp yarn relaxes under no external force, the spring releases its potential energy to drive the bobbin to take in the yarn. This eliminates the need for complex components such as motors and sensors, achieving adaptive and constant tension control. Furthermore, it features a modular and compact structure. The baffles are arranged in an alternating pattern to create a height difference in the warp yarns, preventing entanglement. The square steel tube frame allows for symmetrical expansion of the warp feeding unit. By adjusting the number of baffles, the number of warp yarns on the bobbin, and the number of rows, it flexibly adapts to the weaving needs of multi-layered, high-density three-dimensional fabrics. The optimized warp yarn transport path design ensures that the warp yarns are guided by guide rollers, separated by a reed, and then output. Combined with a specific shaft mounting and limiting structure, it reduces fiber friction and entanglement, adapting to the brittle and tension-sensitive characteristics of high-performance inorganic fibers, thus reducing the breakage rate. Based on the above structure, a passive warp feeding method is further established, which relies on the traction force at the weave edge to drive the independent directional feeding of high warp density warp yarns without the need for additional auxiliary equipment. This method completes the precise feeding of a large number of warp yarns in a compact space, balancing equipment cost, space occupation, and weaving stability.

[0034] Example 1 Please see Figures 1 to 7 As shown, Embodiment 1 of the present invention provides a differential warp beam type spring feeding device for a multi-harness loom, including multiple independently arranged differential warp beam units and mounting frames; wherein, each differential warp beam unit includes a winding bobbin 11, a pressure spring 12, a spring coiling turntable 13, a yarn guide roller (an upper yarn guide roller 14 and a lower yarn guide roller 16 arranged symmetrically), a yarn separating reed 15, a baffle 17, and a square steel tube 18.

[0035] The outer shell of the spring-loaded turntable 13 is fixedly mounted on the baffle 17 with screws. The winding drum 11 is connected to the spring-loaded turntable 13 through a gear transmission mechanism and can rotate synchronously with it. After the warp yarn is drawn out from the winding drum 11, it passes sequentially above the upper guide roller 14, below the yarn separating reed 15 and the lower guide roller 16, achieving a uniform distribution of the warp yarn. The pressure spring 12 contacts the winding drum 11, controlling the contact and disconnection between the winding drum 11 and the spring-loaded turntable 13, facilitating yarn arrangement. The baffle 17 is further fixed to the square steel tube 18, and differential warp beam units with identical structures can be symmetrically arranged on both sides of the square steel tube 18.

[0036] When the warp yarn is subjected to weaving tension, the bobbin 11 rotates forward to release the yarn, and the spring coiling disc 13 rotates accordingly through gear transmission and stores energy; when the warp yarn is slack, the spring coiling disc 13 rotates under its own restoring torque, driving the bobbin 11 to rotate in reverse synchronously, gathering the slack warp yarn, thereby realizing adaptive adjustment and constant control of warp yarn tension.

[0037] In some embodiments, the baffles 17 are arranged at different staggered heights, so that the warp yarns drawn out from each winding bobbin 11 form a clear height difference, effectively avoiding mutual entanglement. Each differential warp beam unit is provided with a corresponding upper guide roller 14, lower guide roller 16 and yarn separating reed 15 (also called small steel reed) above it along the warp feeding direction. Each differential warp beam can realize the parallel and independent feeding of multiple warp yarns. By configuring the number of warp yarns on the winding bobbin 11, the number of warp yarns fed per beam can be flexibly adjusted.

[0038] All warp yarns on each differential warp beam unit perform synchronous take-up and untake-up actions as a whole, which can meet the total warp yarn supply required for an independent layer in a multi-layered fabric. By adjusting the number of baffles 17 and the number of warp yarns on each bobbin 11, the high warp density warp feeding requirements of a single layer of fabric can be precisely adapted. Furthermore, by adjusting the number of rows of the warp feed beam and the corresponding configuration of the upper guide roller 14 and lower guide roller 16, it can be expanded to layered warp feeding scenarios for fabrics with two or more layers, realizing flexible weaving of multi-layered, high-density fabrics. The conveying paths of all warp yarns are independent of each other and do not interfere with each other, which has good scalability and process adaptability.

[0039] The spring-loaded turntable 13 employs a unique structure combining an internal gear 22 and a spring-loaded spring 23, enabling it to automatically and continuously perform the unwinding and rewinding of warp yarns, achieving self-adjustment and stable maintenance of tension. Its purely mechanical working principle is reliable, has a long service life, and is suitable for the continuous operation requirements of industrialized textile production.

[0040] Specifically, the mainspring coil turntable 13 is mainly composed of a chassis 21, an internal gear 22, a mainspring coil spring 23, a mainspring rotating disc 24, an outer retaining ring 25, a transmission gear 27, and fixing screws 26 / 28.

[0041] The chassis 21 has four mounting holes and is fixed to the baffle 17 with screws to ensure that it remains stationary during operation. The internal gear 22 is tightly fitted inside the chassis 21 and is fixed synchronously with the chassis 21. The outer end of the spring coil 23 is engaged in the slot of the internal gear 22, while the inner end is fixed in the inner slot of the spring rotating disk 24.

[0042] When the mainspring rotating disk 24 rotates under the tension of the warp yarn, it causes the mainspring coil spring 23 to wind up, storing elastic potential energy. As the rotating disk continues to move, the outer ring of the mainspring coil spring 23 is released from one slot of the internal gear 22 and quickly snaps into the next adjacent slot under its own rebound force, releasing some potential energy at the same time. This "storage-release" process repeats continuously, so that the warp yarn continuously receives a taut restoring force, thereby maintaining constant tension.

[0043] The winding drum 11 achieves synchronous rotation through the meshing transmission gear 27: when the warp yarn is released, the spring coil 23 is tightened to store energy; when the warp yarn is relaxed without external force, the rebound force of the spring coil 23 drives the spring rotating disk 24 and the winding drum 11 to reverse, thereby retracting the relaxed warp yarn.

[0044] To further enhance the stability of the device, the outer retaining ring 25 is mounted on top of the chassis 21 by fixing screws 26. Its inner diameter is slightly larger than the outer diameter of the mainspring rotating disk 24, thereby achieving non-contact axial limiting of the rotating disk and ensuring its free and low-friction rotation. The transmission gear 27 is fixed to the mainspring rotating disk 24 by fixing screws 28 and rotates together with the mainspring rotating disk 24 to achieve synchronous movement between the mainspring coil spring 23 and the winding drum 11.

[0045] Based on the above structural components, further installation and configuration details are as follows: The baffle 17 is threadedly connected to a large double-ended threaded shaft 31 and a small double-ended threaded shaft 33. The winding drum 11 is fitted onto the smooth shaft of the large double-ended threaded shaft 31, with one side limited by a nut and the other side in contact with a pressure spring 12. The mainspring rotating disc 24 is fixed to the baffle 17 with screws, effectively preventing the chassis 21 from rotating. The driven gear 32 is fixed to the winding drum 11 with screws, and the driven gear 32 meshes with the transmission gear 27 for transmission. This connection scheme ensures that the winding drum 11 can rotate synchronously and precisely following the movement of the mainspring coil spring 23.

[0046] The upper guide roller 14 and the lower guide roller 16 are respectively mounted on the optical axis of the small double-headed toothed shaft 33 / 37, and are limited at both ends by limiting nuts 34 / 38. They are installed alternately on both sides of the yarn separating reed 15. Their function is to guide the warp yarn path and effectively reduce the friction of the warp yarn during operation. The winding bobbin 11 has flanges on both sides, which can reliably prevent the warp yarn from shifting or falling off during the guiding process.

[0047] The yarn dividing reed 15 is fixed to the baffle 17 by a special clamping block 35. The clamping block 35 is locked by screws and clamped by the top screw 36 to prevent it from loosening during operation, thus ensuring the uniformity and stability of the warp yarn distribution.

[0048] In some specific implementations, the key components are configured with the following preferred parameters: 1. Frame structure parameters Baffle 17: Dimensions are 250 mm × 140 mm × 6 mm; The 18 square steel tube frame adopts a modular combination: the size and quantity are set as follows: 40 mm × 80 mm × 1200 mm, 9 pieces; 40 mm × 40 mm × 1280 mm, 4 pieces; 40 mm × 80 mm × 500 mm, 4 pieces; 40 mm × 40 mm × 1200 mm, 2 pieces; 40 mm × 80 mm × 2500 mm, 6 pieces.

[0049] 2. Winding system parameters Winding spool 11: spool diameter 65 mm, total outer width 120 mm, disc diameter 130 mm, inner width 100 mm; Reed 15: Size is 15 cm × 7 cm, reed density is 8 teeth / cm.

[0050] 3. Parameters of the core components of the mainspring Chassis 21: Outer diameter 85 mm, inner diameter 65 mm; Internal gear 22: outer diameter 65 mm, number of teeth 20, thickness 12 mm; Spring 23: Dimensions are 0.5 mm × 12 mm × 1540 mm × 55 mm; Mainspring rotating disk 24: outer diameter 68 mm; rated mainspring tension: 20 N.

[0051] 4. Elastic element parameters Compression spring 12: Dimensions are 2 mm × 20 mm × 30 mm.

[0052] Reference Figures 1 to 7 As shown, the actual operating process of the differential warp beam type spring feeding device for multi-harness looms is as follows: After the warp yarns are drawn out from the bobbin 11, they pass through the upper guide roller 14, the combing reed 15, and finally the lower guide roller 16 to form a uniform arrangement. When the warp yarns are subjected to traction during weaving, the bobbin 11 rotates forward to release the yarn, driving the spring coil 23 to wind up and store potential energy; when the warp yarns slack, the spring coil 23 drives the bobbin 11 to reverse under its own restoring force, promptly gathering the slack yarns and achieving adaptive tension adjustment.

[0053] Adjustable function implementation: By adjusting the nut on the opposite side of the pressure spring 12, the horizontal displacement of the winding drum 11 can be controlled, realizing the engagement and disengagement of the driven gear 32 and the transmission gear 27. This design facilitates equipment debugging and process adjustment, and demonstrates good adaptability in actual operation.

[0054] Implementation Results: The implementation cases using the above parameter configurations demonstrate that this device can provide a constant tension of 20N for each warp yarn during multi-layer open weaving, effectively avoiding problems such as unclear weave and difficulty in weft insertion caused by uneven tension. It is particularly suitable for three-dimensional weaving of high-performance inorganic fibers such as carbon fiber and glass fiber.

[0055] Example 2 Embodiment 2 of this application provides a differential warp beam type spring feeding method, which realizes the warp feeding process based on the above-mentioned differential warp beam type spring feeding device for multi-harness looms, including the following steps: S1, the baffles 17 of multiple independently set differential warp beam units are arranged alternately up and down along the warp feed direction, and multiple warp yarns are wound side by side on at least part of the winding bobbin 11; S2, all warp yarns on each winding bobbin 11 are simultaneously drawn out and kept in parallel, passing through the corresponding upper guide roller 14, through the yarn separating reed 15, and passing through the corresponding lower guide roller 16 in sequence for guidance and combing, so that the warp yarns are evenly arranged and have independent paths; S3, after all the warp yarns are finally gathered, each row of warp yarns passes through the large reed 19 in a unified manner, and the warp is fed by the traction force at the front end (weaving end) of the warp feed direction; among them, each group of guide rollers guides at most one warp yarn on the winding bobbin 11 to ensure that the warp yarn path is clear and does not interfere with each other.

[0056] S4, when the warp yarn is under tension, the winding drum 11 rotates forward to release the yarn, and the spring coiling disc 13 stores energy; when the warp yarn is slack, the spring coiling disc 13 drives the winding drum 11 to reverse to take in the yarn, maintaining constant warp yarn tension.

[0057] In the above process, the warp feeding method is passive warp feeding, which can realize the independent feeding of high warp density warp yarns in a specific arrangement and direction without the need for auxiliary equipment such as motors, sensors or tension swing rods, significantly reducing equipment costs and floor space.

[0058] In one feasible implementation, the warp yarn arrangement density on the winding bobbin 11 is 0 to 30 yarns / cm, and the warp yarn arrangement density on the guide roller is 0 to 25 yarns / cm; all the warp yarns drawn out from each winding bobbin 11 are arranged horizontally in the guide section of the guide roller.

[0059] The differential warp beam type spring feeding method provided in this application effectively overcomes the inherent defects of traditional warp beam feeding and yarn frame feeding. While achieving a compact structure and low cost, it further solves the problem of maintaining constant single yarn tension in warp beam feeding. Adopting a modular and detachable design, it can be flexibly combined and configured according to the number of fabric layers and width requirements, possessing wide adaptability. It is particularly suitable for the independent directional feeding of high warp density warp yarns, thus providing a feasible technical path for the efficient and stable weaving of high-thickness inorganic fiber three-dimensional fabrics.

[0060] Please refer to Figure 6 and Figure 7 This embodiment 2 demonstrates the integrated arrangement of the aforementioned warp feeding device and the warp feeding method for weaving a 60-layer high-thickness carbon fiber fabric. The specific process is as follows: The baffles 17 of multiple differential warp beam units are arranged in an alternating vertical arrangement along the warp feed direction. After the warp yarn is drawn from the bobbin 11, it passes above the upper guide roller 14, then through the separating reed 15 for yarn separation, and then below the lower guide roller 16, finally converging into the large reed 19. The warp feed power comes from the continuous traction of the warp yarn in the weaving direction, achieving passive warp feed.

[0061] The large reed 19 is used to separate all the yarns one by one. The yarn separating reed 15 is used to separate the yarns between the winding bobbins inside each micro-unit, while the large reed 19 is used to separate the yarns between the outside of each micro-unit.

[0062] Furthermore, the vertical spacing between adjacent baffles 17 within the same row is 2 mm, while the longitudinal spacing between the first and second rows of baffles 17 is 150 mm. Ten baffles 17 are arranged side-by-side in a single row, for a total of 5 rows. Square steel tubes 18 are symmetrically installed on both sides, accommodating a total of 120 baffle units 17.

[0063] Each spring-loaded turntable 13 can independently control the warp feed of one warp layer, and this configuration can achieve independent control of 60 layers of carbon fiber warp yarns. By adjusting the length of the winding bobbin 11 and the threading sequence, it can adapt to the width requirements of different fabrics.

[0064] In this embodiment, the inner diameter of a single winding bobbin 11 is 200 mm, corresponding to a fabric width of 200 mm. For a 60-layer thick carbon fiber fabric with a warp density of 10 yarns / cm, 12,000 yarns are required. Each group of carbon fiber yarns passes through a guide roller and is threaded into a yarn separating reed 15. One carbon fiber yarn is threaded through each reed eye. In the 120 sets of devices, each set individually controls 100 warp yarns. The overall dimensions of the warp feeding system are 2500 mm in length, 500 mm in width, and 1000 mm in height. It has a compact structure and a large capacity.

[0065] This embodiment fully verifies the beneficial effects of the delivery device described in this invention: The compact layout of 120 differential warp beam units enables independent constant tension control of 24,000 warp yarns within a space of only 2580mm×580mm×1280mm, significantly reducing equipment costs and space requirements. The spring coil turntable 13 ensures adaptive and constant tension for each warp yarn. The modular design supports independent control of 60 layers of yarn, demonstrating broad adaptability to complex three-dimensional weaving processes. The synergistic effect of the yarn guide roller and the yarn separating reed 15 ensures clear and stable high-density yarn arrangement, effectively reducing yarn wear and breakage rate.

[0066] In summary, this invention provides a differential warp beam type spring feeding device and method for multi-harness looms, relating to the field of textile machinery technology, and applicable to high-performance inorganic fiber three-dimensional weaving. This device decomposes the traditional large warp beam into several independent differential warp beam units, each mainly consisting of a winding bobbin and a spring coiling disc, capable of independently responding to tension changes. Employing a purely mechanical structure, when the warp yarn is taut, the winding bobbin releases the yarn and the spring coiling disc stores energy; when relaxed, the spring coiling disc drives the winding bobbin to take in the yarn, achieving adaptive constant tension control. Staggered baffles prevent warp yarn entanglement, and the guide roller and reed reduce fiber friction, adapting to the brittle characteristics of inorganic fibers. The warp feeding method is passive, driven by the weave traction force, requiring no motor or sensor. This device is compact, low-cost, and flexibly adaptable to multi-layer, high-density three-dimensional fabric weaving, effectively solving problems such as uneven interlayer tension and slow response, reducing yarn damage, and providing key technical support for the industrialization of high-thickness inorganic fiber fabrics.

[0067] It should be noted that the present invention is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments that have the same structure and perform the same effects as the technical concept within the scope of the present invention are included within the scope of the present invention. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of the present invention, are also included within the scope of the present invention.

Claims

1. A differential warp beam type spring feeding device for a multi-harness loom, characterized in that, It includes multiple independently configured differential warp axis units arranged in a predetermined structure; each differential warp axis unit includes: A bobbin is used to wind warp yarns. A spring-winding turntable is connected to the winding drum via a transmission mechanism. When the warp yarn is stretched taut, the spring-loaded turntable rotates and stores energy along with the forward-rotating bobbin. When the warp yarn is relaxed without external force, the potential energy is released through the restoring torque to drive the bobbin to rotate in the opposite direction to take in the yarn, thus realizing adaptive adjustment and constant control of the warp yarn tension.

2. The differential warp beam type spring feeding device for a multi-harness loom according to claim 1, characterized in that, The mainspring turntable includes a mainspring, a base, an internal gear, and a rotatable mainspring turntable; The internal gear is embedded inside the chassis and fixed synchronously; the outer end of the spring coil is engaged in the groove of the internal gear, and the inner end is fixed in the inner groove of the spring rotating disk. When the mainspring rotating disk is driven to rotate by the warp tension, it causes the mainspring coil spring to wind up and store energy. As the mainspring rotating disk continues to rotate, the outer ring of the mainspring coil spring is released from one of the slots of the internal gear and quickly enters the next adjacent slot under its own rebound force, while releasing part of the potential energy to provide continuous tension recovery force for the warp yarn, thereby maintaining constant tension.

3. A differential warp beam type spring feeding device for a multi-harness loom according to claim 2, characterized in that, The winding drum and the spring coil turntable are connected by a gear transmission device. The gear transmission device includes a driven gear fixed on the winding drum and a transmission gear fixed on the mainspring rotating disk. The driven gear and the transmission gear mesh with each other to realize the synchronous rotation of the winding drum and the mainspring rotating disk.

4. A differential warp beam type spring feeding device for a multi-harness loom according to claim 3, characterized in that, The differential warp beam unit also includes a guide roller for guiding the warp yarn drawn out from the winding bobbin and a combing reed for separating the warp yarn; The yarn guide rollers include an upper yarn guide roller and a lower yarn guide roller arranged symmetrically. The yarn separating reed is located between the two sets of yarn guide rollers. After the warp yarn is drawn out from the winding bobbin, it is guided by the yarn guide rollers, separated by the yarn separating reed, and then output.

5. A differential warp beam type spring feeding device for a multi-harness loom according to claim 4, characterized in that, The differential warp beam unit also includes a baffle for mounting the mainspring coiling disc; The baffles are arranged alternately up and down along the warp feed direction, so that the warp yarns drawn out from each winding bobbin form a height difference.

6. A differential warp beam type spring feeding device for a multi-harness loom according to claim 5, characterized in that, The differential warp unit also includes a pressure spring; The pressure spring contacts the winding drum to control the engagement state between the winding drum and the mainspring coil turntable.

7. A differential warp beam type spring feeding device for a multi-harness loom according to claim 5, characterized in that, The differential warp beam type spring feeding device for multi-harness looms includes a mounting frame; the mounting frame is a modular frame formed by splicing square steel tubes. The baffle is fixed to the square steel tube, and the two sides of the square steel tube are symmetrically arranged with the same differential warp axis units.

8. A differential warp beam type spring feeding device for a multi-harness loom according to claim 6, characterized in that, The baffle is equipped with a large double-ended toothed shaft and a small double-ended toothed shaft; The winding drum is limited and fitted onto the optical axis of the large double-headed toothed shaft, and the yarn guide roller is limited and fitted onto the optical axis of the small double-headed toothed shaft; the pressure spring is fitted onto the large double-headed toothed shaft, and one end is in contact with the winding drum.

9. A method for feeding a differential warp shaft type spring, characterized in that, Warp feeding is achieved using the differential warp beam type spring feeding device for multi-harness looms as described in any one of claims 1 to 8, comprising the following steps: S1, the baffles of multiple differential warp beam units are arranged alternately up and down along the warp feed direction, and a preset number of warp yarns are wound side by side on the winding drum; S2, synchronously draws out the warp yarns on each bobbin, passes them sequentially around the corresponding upper guide roller, through the yarn separating reed, and around the corresponding lower guide roller, to guide and comb them, so that the warp yarns are evenly arranged and have independent paths; S3, after all the warp yarns are gathered, they pass through the large steel reed and are passively fed by the traction force in the direction of the weave opening; S4: When the warp yarn is stretched taut, the bobbin rotates forward to release the yarn, and the spring-loaded turntable stores energy; when the warp yarn is relaxed without external force, the spring-loaded turntable drives the bobbin to rotate in reverse to take in the yarn, maintaining constant warp yarn tension.

10. The differential warp beam spring feeding method according to claim 9, characterized in that, The vertical spacing between adjacent baffles is 1~3mm, and the longitudinal spacing between different rows of baffles is 120~180mm; The warp yarns drawn from a single bobbin are arranged horizontally in the guide section of the yarn guide roller. The warp yarn arrangement density on each bobbin is 0~30 yarns / cm, and the arrangement density after being guided by the yarn guide roller is 0~25 yarns / cm. The warp yarn is made of carbon fiber, glass fiber, or basalt fiber; The differential warp beam type spring feeding method is applicable to the weaving of 3- to 60-layer high-thickness three-dimensional fabrics.

Images