A vertical vibrating yarn spreading device

Abstract

The utility model discloses a kind of yarn spreading devices of vertical vibration, including support frame;Still including fixed plate and lifting assembly;Two mounting brackets are fixedly connected on the upper end of support frame, fixed plate is fixedly connected in mounting bracket inner wall, fixed plate outside is fixedly connected with guide rail, sliding block is slidably arranged in the outer wall of guide rail, sliding block inside is fixedly connected with yarn spreading rod, protective shell upper end is fixedly connected in mounting bracket, screw rod is slidably arranged in the inside of protective shell, connecting block is fixedly connected in the lower end of screw rod, connecting block is fixedly connected with sliding block by connecting piece, lifting assembly is arranged in the inside of protective shell.The utility model drives screw rod to vertically lift along sleeve inner wall by rotating first bevel gear ring, connecting block in the lower end of screw rod drives sliding block to slide along guide rail, limiting frame limits the maximum stroke of sliding block, inductor monitors sliding block position and feedback signal, and control motor adjusts rotating direction, and then make sliding block drive inside yarn spreading rod to carry out up-down high-frequency vibration, yarn is unfolded, straightened, and yarn spreading evenness is improved.

Description

Technical Field

[0001] This utility model relates to the field of yarn spreading devices, specifically to a yarn spreading device with vertical vibration. Background Technology

[0002] The yarn spreading process is a crucial step in textiles and composite materials industries, where fiber yarns (such as glass fiber, carbon fiber, and polyester filament) are spread into uniform thin strips. Its quality directly affects the performance of subsequent products. For example, in composite preforms, the uniformity of yarn spreading determines the consistency of the material's mechanical properties; in textile weaving, the quality of yarn spreading affects the smoothness and weight stability of the fabric.

[0003] Existing yarn-spreading devices utilize high-pressure airflow to flatten the yarn, blowing it laterally through symmetrically arranged nozzles. The airflow impact force causes the fiber bundles to separate laterally, while the spread width is controlled by the constraint of the airflow velocity field. The device is equipped with a pressure regulating valve and a flow controller, allowing for adjustments to air pressure and nozzle angles to accommodate yarns of different materials such as carbon fiber and polyester.

[0004] High-pressure airflow blows the yarn from the side, using the impact force of the airflow to separate the fibers. Since the surface fibers are first affected by the airflow and deflected, while the core fibers are constrained by the outer layer, the yarn will be unstable in the lateral force. The unfolded tape surface will have a "wavy" edge, which can easily cause lamination deviation during composite material layup. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a vertical vibration yarn spreading device. By rotating the first bevel gear ring, the screw is driven to rise and fall vertically along the inner wall of the sleeve. The connecting block at the lower end of the screw drives the slider to slide along the guide rail, thereby causing the slider to drive the inner yarn spreading rod to vibrate up and down at high frequency, spreading and straightening the yarn on the surface of the yarn spreading rod, and improving the uniformity of yarn spreading.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A vertically vibrating yarn spreading device includes a support frame, a fixed plate, and a lifting assembly. Two mounting brackets are fixedly connected to the upper end of the support frame. A fixed plate is fixedly connected to the inner wall of each mounting bracket. A guide rail is fixedly connected to the outer side of the fixed plate. A slider is slidably mounted on the outer wall of the guide rail. A yarn spreading rod is fixedly connected to the inner side of the slider. A protective shell is fixedly connected to the upper end of the mounting brackets. A screw is slidably mounted inside the protective shell. A connecting block is fixedly connected to the lower end of the screw. The connecting block and the slider are fixedly connected via a connector. The lifting assembly is located inside the protective shell.

[0008] In one optional embodiment, the inner wall of the mounting bracket is provided with multiple equidistant positioning grooves, and multiple sets of fixing plates are disposed on the inner wall of the positioning grooves.

[0009] In one optional embodiment, two symmetrically arranged limiting frames are fixed to the outside of the mounting bracket. The sides of the limiting frames are L-shaped, and sensors are fixed to the outside of the limiting frames.

[0010] In one optional embodiment, the lifting assembly includes a first bevel gear, the first bevel gear is rotatably disposed on the left end of the inner wall of the protective shell, a motor is fixedly connected to the left end of the protective shell, and the first bevel gear is fixedly connected to the output end of the motor.

[0011] In one optional embodiment, a first bevel gear ring is rotatably provided at the bottom end of the inner wall of the protective shell, the first bevel gear ring is threadedly installed on the outer wall of the screw, a sleeve is fixedly connected to the upper end of the protective shell, and the screw is slidably disposed on the inner wall of the sleeve.

[0012] In one optional embodiment, a second bevel gear is rotatably disposed on the right end of the inner wall of the protective shell, and a first connecting rod is rotatably disposed on the right end of the protective shell. The first connecting rod is fixedly connected to the second bevel gear, and the first bevel gear ring meshes with the first bevel gear and the second bevel gear.

[0013] In one optional embodiment, a first coupling is fixed to the outer wall of the first connecting rod, a second connecting rod is disposed between the two protective shells, a second coupling is fixed to both ends of the second connecting rod, and an elastic gasket is disposed at the connection between the first coupling and the second connecting rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. By rotating the first bevel gear ring, the screw is driven to rise and fall vertically along the inner wall of the sleeve. The connecting block at the lower end of the screw drives the slider to slide along the guide rail. The limit frame limits the maximum stroke of the slider. The sensor monitors the position of the slider and feeds back the signal, and controls the motor to adjust the rotation direction, thereby causing the slider to drive the inner yarn spreading rod to vibrate up and down at high frequency, spreading and straightening the yarn, and improving the uniformity of yarn spreading.

[0016] 2. By installing the first coupling and the second coupling, the power of the second bevel gear can be transmitted to the opposite screw through the second connecting rod, thereby making the yarn spreading rod move stably. The elastic pad absorbs the vibration and impact during the transmission process, reduces component wear, ensures the stability of power transmission, and avoids the yarn spreading rod from running unevenly due to vibration. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of a vertically vibrating yarn spreading device;

[0018] Figure 2 A three-dimensional structural diagram of the yarn spreading rod of a vertically vibrating yarn spreading device;

[0019] Figure 3 A three-dimensional schematic diagram of the slider of a vertically vibrating yarn spreading device;

[0020] Figure 4 A cross-sectional three-dimensional structural diagram of the protective shell of a vertically vibrating yarn spreading device;

[0021] Figure 5 This is a three-dimensional structural diagram of the first coupling of a vertically vibrating yarn spreading device.

[0022] In the diagram: 1. Support frame; 101. Fixing plate; 102. Guide rail; 103. Slider; 104. Yarn spreading rod; 105. Protective shell; 106. Screw; 107. Connecting block; 2. Mounting frame; 201. First bevel gear; 202. Motor; 203. First bevel gear ring; 204. Sleeve; 205. Second bevel gear; 206. First connecting rod; 207. First coupling; 208. Second connecting rod; 209. Second coupling; 210. Elastic washer; 3. Positioning groove; 4. Limiting frame; 5. Sensor. Detailed Implementation

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0027] In the textile industry, uniform yarn spreading is a core process for ensuring product quality, encompassing weaving, dyeing, finishing, and composite material prepreg processes. Yarn spreading devices, as key equipment in this process, unfold single or multiple wound yarns (such as chemical filaments, glass fibers, and carbon fibers) into flat strips of a specific width, ensuring uniform stress, sufficient dyeing, or thorough impregnation during subsequent processing. For example, in tire cord fabric production, nylon or polyester industrial yarns require spreading before impregnation; the quality of spreading directly affects the uniformity of adhesive adhesion, thus determining the strength of the tire skeleton material. In carbon fiber composite molding, poor spreading results in wrinkles or overlaps within the fiber bundles, causing a decrease in the composite's mechanical properties of over 30%.

[0028] Traditional yarn spreading techniques primarily rely on mechanical stretching or airflow to flatten the yarn. Mechanical stretching uses a speed difference created by front and rear rollers or guide rollers to stretch the yarn with tension. The spread width is directly affected by the tension—too little tension results in insufficient spreading, with width deviations reaching ±2mm; too much tension can easily lead to yarn stretching deformation or even breakage, especially for high-strength, low-elongation glass fibers, where the risk of breakage increases significantly. Airflow spreading uses high-pressure airflow (0.3-0.5MPa) injected from both sides or below the yarn, using the impact force of the airflow to spread the yarn. However, this method suffers from high energy consumption (fan power typically exceeds 5kW), high noise (exceeding 90 decibels), and poor spreading stability. Even slight changes in yarn humidity or surface tension can cause spread width fluctuations of ±1.5mm.

[0029] As textile materials become increasingly refined and functional, the requirements for yarn spreading precision are becoming more stringent. For example, ultra-fine denier polyester yarn (monofilament diameter < 5μm) used in high-end apparel needs to be spread to a width of 5-8mm with neat edges. Traditional mechanical or airflow methods struggle to prevent entanglement or splitting between filaments. Carbon fiber (monofilament diameter 7-10μm) used in aerospace composites requires no obvious fuzz after spreading, otherwise it will affect the uniformity of resin impregnation. Furthermore, high-speed production scenarios (such as weaving speeds exceeding 600m / min) place higher demands on the response speed of yarn spreading devices. Traditional technologies, due to adjustment lag, are prone to instantaneous spreading deviations, leading to batch product defects.

[0030] To overcome traditional technological bottlenecks, vibration-assisted yarn spreading technology has gradually entered the research field. Among them, horizontal vibration causes the yarn guide component to reciprocate along the direction of yarn movement, using inertial force to cause the yarn to spread out. However, this method is prone to axial displacement of the yarn, increasing edge fuzz. Vertical vibration (i.e., the vibration direction is perpendicular to the plane of yarn movement) uses alternating vertical forces to cause the yarn bundle to periodically tighten and loosen. Combined with the elastic recovery force of the yarn itself, it achieves uniform flattening and has advantages such as stable flattening effect and less damage to the yarn.

[0031] Current research on vertical vibration yarn spreading devices still has many limitations:

[0032] First, the matching of vibration parameters is poor. There is a lack of systematic research on the matching of vertical vibration frequency (usually 50-500Hz) and amplitude (0.1-2mm) with yarn type and linear velocity. For example, for highly elastic spandex yarn, low-frequency, large-amplitude vibration can easily lead to excessive yarn stretching; for more rigid aramid yarn, high-frequency, small-amplitude vibration is difficult to achieve sufficient flattening. In actual production, a lot of trial and error is needed to adjust parameters, which is time-consuming and labor-intensive.

[0033] Secondly, the vibration source is not stable enough. Existing devices mostly use eccentric wheel mechanical vibration or electromagnetic vibration. Mechanical vibration is prone to amplitude decay due to component wear (the decay rate can reach 10%-15% after 3 months of use); electromagnetic vibration is significantly affected by voltage fluctuations. When the voltage changes by ±5%, the vibration intensity fluctuates by more than 8%, making it difficult to ensure stable yarn spreading over a long period of time.

[0034] Third, there is a lack of coordinated control between yarn tension and vibration. Vertical vibration causes fluctuations in instantaneous yarn tension. If left uncontrolled, the peak tension may exceed 80% of the yarn's breaking strength, increasing the risk of yarn breakage. Traditional devices do not have a real-time tension feedback adjustment mechanism and can only preset vibration parameters based on experience, resulting in poor adaptability.

[0035] Fourth, the structural design is unreasonable. The connection method between the vibrating components and the fixed components (such as rigid connection or simple elastic connection) is prone to resonance, causing the overall vibration noise of the equipment (exceeding 85 decibels) and accelerating the fatigue damage of the components; the vibration direction of some devices is skewed (the angle with the vertical direction is >5°), resulting in uneven widthing of the yarn on both sides, with a deviation of 1-2mm.

[0036] In actual production, these defects directly restrict the promotion and application of vertical vibration technology. For example, a carbon fiber manufacturer tried to use a vertical vibration yarn spreading device, but due to the mismatch between the vibration parameters and the fiber linear velocity, the spreading deviation exceeded ±1mm, and the device was eventually discontinued because the product qualification rate was less than 80%. A dyeing and finishing plant's polyester yarn spreading line had uneven dyeing depth in batches of products due to the poor stability of the vibration source, resulting in direct economic losses of more than one million yuan.

[0037] As the textile industry transforms towards intelligent and high-quality production, the requirements for yarn spreading devices have evolved from simply "widening" to "precision, stability, low damage, and high efficiency." In high-end textile fields, such as the production of SMS nonwoven fabrics for medical protective clothing, the width deviation of polypropylene fibers after spreading must be ≤0.5mm, and the single filament breakage rate must be <0.1%. In industrial textile fields, such as geotextile production, the simultaneous and uniform spreading of multiple yarns (usually 10-20 yarns) is required, which traditional technologies struggle to meet. Therefore, developing a vertical vibration yarn spreading device with precise parameter control, stable vibration output, and coordinated tension control has become an urgent need to overcome existing technological bottlenecks and improve the quality of textile products, playing a significant role in promoting technological upgrading in the textile industry.

[0038] Please refer to Figures 1-5This utility model provides an embodiment: a vertically vibrating yarn spreading device, including a support frame 1; it also includes a fixing plate 101 and a lifting assembly; two mounting brackets 2 are fixedly connected to the upper end of the support frame 1, the fixing plate 101 is fixedly connected to the inner wall of the mounting bracket 2, the guide rail 102 is fixedly connected to the outer side of the fixing plate 101, the slider 103 is slidably arranged on the outer wall of the guide rail 102, the yarn spreading rod 104 is fixedly connected to the inner side of the slider 103, the protective shell 105 is fixedly connected to the upper end of the mounting bracket 2, the screw 106 is slidably arranged inside the protective shell 105, the connecting block 107 is fixedly connected to the lower end of the screw 106, and the connecting block 107 and the slider 103 are fixedly connected by a connector. The protective shell 105 is equipped with a lifting component. By rotating the first conical tooth ring 203, the screw 106 is driven to rise and fall vertically along the inner wall of the sleeve 204. The connecting block 107 at the lower end of the screw 106 drives the slider 103 to slide along the guide rail 102, thereby causing the yarn spreading rod 104 on the inner side of the slider 103 to vibrate vertically, spreading and straightening the yarn, improving the uniformity of yarn spreading. This solves the problem that the surface fibers are first deflected by the airflow, while the core fibers are constrained by the outer layer, which leads to unstable yarn force and "wavy" edges on the spread surface, which easily causes lamination deviation when composite materials are laid up.

[0039] Please refer to Figures 1-3 In a preferred embodiment of this utility model, the inner wall of the mounting frame 2 is provided with multiple equidistantly distributed positioning grooves 3, and multiple sets of fixing plates 101 are disposed on the inner wall of the positioning grooves 3. Two symmetrically arranged limiting frames 4 are fixedly connected to the outer side of the mounting frame 2. The side of the limiting frame 4 is L-shaped, and a sensor 5 is fixedly connected to the outer side of the limiting frame 4. The limiting frame 4 limits the maximum stroke of the slider 103. The sensor 5 monitors the position of the slider 103 and feeds back a signal, and controls the motor 202 to adjust the rotation direction.

[0040] Please refer to Figures 2-5In a preferred embodiment of this utility model, the lifting assembly includes a first bevel gear 201. The first bevel gear 201 is rotatably mounted on the left end of the inner wall of the protective shell 105. A motor 202 is fixedly connected to the left end of the protective shell 105. The first bevel gear 201 is fixedly connected to the output end of the motor 202. A first bevel gear ring 203 is rotatably mounted on the bottom end of the inner wall of the protective shell 105. The first bevel gear ring 203 is threaded onto the outer wall of the screw 106. A sleeve 204 is fixedly mounted on the upper end of the protective shell 105. The screw 106 is slidably mounted on the inner wall of the sleeve 204. A second bevel gear 205 is rotatably mounted on the right end of the inner wall of the protective shell 105. A first connecting rod 206 is rotatably mounted on the right end of the protective shell 105. The first connecting rod 206 is fixedly connected to the second bevel gear 205. The first bevel gear ring 203 and... The first bevel gear 201 and the second bevel gear 205 mesh with each other. A first coupling 207 is fixedly connected to the outer wall of the first connecting rod 206. A second connecting rod 208 is provided between the two protective shells 105. A second coupling 209 is fixedly connected to both ends of the second connecting rod 208. An elastic washer 210 is provided at the connection between the first coupling 207 and the second connecting rod 208. By installing the first coupling 207 and the second coupling 209, the power of the second bevel gear 205 can be transmitted to the oppositely arranged screw 106 through the second connecting rod 208, thereby making the yarn spreading rod 104 move stably. The elastic washer 210 absorbs the vibration and impact during the transmission process, reduces component wear, ensures the stability of power transmission, and avoids the yarn spreading rod 104 from running unstablely due to vibration.

[0041] In use, the motor 202 is started to drive the first bevel gear 201 to rotate. The first bevel gear 201 meshes with the first bevel ring 203, thereby driving the first bevel ring 203 to rotate. At this time, the screw 106 is driven to rise and fall vertically along the inner wall of the sleeve 204 through the threaded engagement. The connecting block 107 at the lower end of the screw 106 drives the slider 103 to slide along the guide rail 102. The limit frame 4 limits the maximum stroke of the slider 103. The sensor 5 monitors the position of the slider 103 and feeds back the signal, and controls the motor 202 to adjust the rotation direction, thereby causing the yarn spreading rod 104 on the inner side of the slider 103 to vibrate vertically, spreading and straightening the yarn, and improving the uniformity of yarn spreading.

[0042] By installing the first coupling 207 and the second coupling 209, the power of the second bevel gear 205 can be transmitted to the oppositely arranged screw 106 through the second connecting rod 208, thereby making the yarn spreading rod 104 move stably. The elastic pad 210 absorbs the vibration and impact during the transmission process, reduces component wear, ensures the stability of power transmission, and avoids the yarn spreading rod 104 from running unevenly due to vibration.

[0043] Through the above steps, by rotating the first conical tooth ring 203, the screw 106 is driven to rise and fall vertically along the inner wall of the sleeve 204. The connecting block 107 at the lower end of the screw 106 drives the slider 103 to slide along the guide rail 102, thereby causing the yarn spreading rod 104 on the inner side of the slider 103 to vibrate vertically, spreading and straightening the yarn, improving the uniformity of yarn spreading, and solving the problem that the surface fibers are first deflected by the airflow, while the core fibers are constrained by the outer layer, which leads to unstable yarn force and "wavy" edges on the spread surface, which easily causes lamination deviation when composite materials are laid up.

[0044] Although only certain components and embodiments of this application have been illustrated and described, many modifications and alterations (e.g., variations in the size, dimensions, structure, shape and proportion of the various elements, installation arrangement, material use, color, orientation, etc.) will be conceived by those skilled in the art without actually departing from the scope and spirit of the claims.

[0045] Finally, it should be noted that the above embodiments are only preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A vertically vibrating yarn spreading device, comprising a support frame (1); characterized in that: It also includes a fixed plate (101) and a lifting assembly; the upper end of the support frame (1) is fixedly connected to two mounting brackets (2), the inner wall of the mounting bracket (2) is fixedly connected to the fixed plate (101), the outer side of the fixed plate (101) is fixedly connected to the guide rail (102), the outer wall of the guide rail (102) is slidably provided with a slider (103), the inner side of the slider (103) is fixedly connected to a yarn spreading rod (104), the upper end of the mounting bracket (2) is fixedly connected to a protective shell (105), the inside of the protective shell (105) is slidably provided with a screw (106), the lower end of the screw (106) is fixedly connected to a connecting block (107), the connecting block (107) and the slider (103) are fixedly connected by a connector, and the inside of the protective shell (105) is provided with a lifting assembly.

2. The yarn-spreading device with vertical vibration according to claim 1, characterized in that: The mounting bracket (2) has multiple equidistantly distributed positioning grooves (3) on its inner wall, and multiple sets of fixing plates (101) are set on the inner wall of the positioning grooves (3).

3. The yarn-spreading device with vertical vibration according to claim 1, characterized in that: The mounting bracket (2) has two symmetrically arranged limit brackets (4) fixed to its outer side. The limit brackets (4) are L-shaped on the side and a sensor (5) is fixed to its outer side.

4. The yarn-spreading device with vertical vibration according to claim 1, characterized in that: The lifting assembly includes a first bevel gear (201), the first bevel gear (201) is rotatably disposed on the left end of the inner wall of the protective shell (105), and a motor (202) is fixedly connected to the left end of the protective shell (105). The first bevel gear (201) is fixedly connected to the output end of the motor (202).

5. The yarn-spreading device with vertical vibration according to claim 1, characterized in that: The bottom of the inner wall of the protective shell (105) is rotatably provided with a first bevel gear ring (203), which is threaded onto the outer wall of the screw (106). The upper end of the protective shell (105) is fixedly connected with a sleeve (204), and the screw (106) is slidably disposed on the inner wall of the sleeve (204).

6. The yarn-spreading device with vertical vibration according to claim 5, characterized in that: A second bevel gear (205) is rotatably provided on the right end of the inner wall of the protective shell (105), and a first connecting rod (206) is rotatably provided on the right end of the protective shell (105). The first connecting rod (206) is fixedly connected to the second bevel gear (205), and the first bevel ring (203) meshes with the first bevel gear (201) and the second bevel gear (205).

7. A vertically vibrating yarn-spreading device according to claim 6, characterized in that: A first coupling (207) is fixed to the outer wall of the first connecting rod (206), and a second connecting rod (208) is provided between the two protective shells (105). A second coupling (209) is fixed to both ends of the second connecting rod (208), and an elastic gasket (210) is provided at the connection between the first coupling (207) and the second connecting rod (208).

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