Prepreg fiber anti-twisting yarn mechanism and use method thereof

Abstract

The present invention relates to the technical field of anti-twisting devices, and specifically to a prepreg fiber anti-twisting yarn mechanism; comprising a box, a driving assembly, a lifting assembly, a guide rod and a fixed rod; the box is provided with an opening for feeding and discharging fiber bundles, the driving assembly is installed at the top of a side wall of the box, the lifting assembly is installed in the box, the top of the lifting assembly is connected to the driving end of the driving assembly, the guide rod and the fixed rod are parallel and both installed in the box, there is a gap between the guide rod and the fixed rod, the guide rod is connected to the lifting end of the lifting assembly, when the driving end of the driving assembly is in a working state, the lifting end of the lifting assembly can drive the guide rod to slide along the height direction of the box, and the guide rod and the fixed rod are both used for slidable tensioning cooperation with the fiber bundle. The purpose of the present invention is to solve the problem that in the process of yarn spreading of prepreg cloth production, the fiber bundle is prone to twisting and needs to be manually paved.

Description

Technical Field

[0001] The invention relates to the technical field of anti-twisting devices, and in particular to a prepreg fiber anti-twisting yarn mechanism. Background Art

[0002] Prepreg is a composite material made of resin matrix and reinforcement by impregnating continuous fibers or fabrics with resin matrix under strictly controlled conditions. For example, carbon fiber prepreg is a composite material made of carbon fiber yarn, epoxy resin, release paper and other materials through high pressure and high temperature technology to compound epoxy resin on carbon fiber, and then processed through coating, hot pressing, cooling, laminating and winding.

[0003] In the yarn spreading process of producing prepreg cloth, it is necessary to pull the fiber bundle from the fiber reel and put the fiber bundle into the yarn spreading equipment for yarn spreading treatment. As the fibers on the fiber reel are pulled out, the diameter of the fiber reel becomes smaller, thereby increasing the distance between the fiber reel and the yarn spreading equipment, reducing the tension of the fiber bundle, and causing the fiber bundle to become twisted during the yarn spreading treatment. At present, the only way to solve this problem is to turn over and flatten the twisted fiber bundle during the yarn spreading treatment. However, the temperature is high during the process of flattening the fibers, which not only easily causes burns to the workers, but also increases labor costs. At the same time, the manual flattening of the fibers by the workers causes uneven fiber tension. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a prepreg fiber anti-twisting yarn mechanism to solve the problem that fiber bundles are easily twisted and need to be manually flattened during the yarn spreading process of producing prepreg cloth.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical scheme: a prepreg fiber anti-twisting yarn mechanism, comprising a box, a driving assembly, a lifting assembly, a guide rod and a fixing rod;

[0006] The box body is provided with an opening for feeding and discharging fiber bundles, the driving assembly is installed at the top end of one side wall of the box body, the lifting assembly is installed in the box body, the top end of the lifting assembly is connected to the driving end of the driving assembly, the guide rod and the fixed rod are parallel and both are installed in the box body, there is a gap between the guide rod and the fixed rod, the guide rod is connected to the lifting end of the lifting assembly, when the driving end of the driving assembly is in a working state, the lifting end of the lifting assembly can drive the guide rod to slide along the height direction of the box body, and the guide rod and the fixed rod are both used to be in a slidable tensioning fit with the fiber bundles.

[0007] When the above technical solution is adopted, the fiber bundle enters into the box from the opening of the box, and the fiber bundle slides over the guide rod and the fixed rod. When the tension of the fiber on the guide rod or the fixed rod is insufficient, the driving assembly is started, and the driving end of the driving assembly drives the lifting assembly to make the lifting end of the lifting assembly rise or fall, thereby driving the guide rod to rise or fall through the lifting assembly, thereby enhancing the tension between the fiber bundle and the guide rod and the fixed rod, so that the guide rod and the fixed rod are in a tensioned state with the fiber, thereby preventing the fiber from becoming twisted.

[0008] Preferably, the driving assembly includes a motor, the driving end of the driving assembly is the rotating shaft of the motor, the motor is installed at the top of a side wall of the box, and the rotating shaft of the motor is coaxially connected to the top of the lifting assembly.

[0009] Preferably, the lifting assembly includes a ball screw, the lifting end of the lifting assembly is the nut of the ball screw, the nut of the ball screw is slidably installed on the inner wall of the box along the height direction of the box, the screw of the ball screw is coaxially fixedly connected to the rotating shaft of the motor, and the nut of the ball screw is connected to the end of the guide rod.

[0010] Preferably, the guide rod has an edge with a circular arc angle, the edge is parallel to the axis of the fixing rod, and the edge is used for slidably tensioning fit with the fiber bundle.

[0011] Preferably, the guide rod is a triangular prism or a quadrangular prism.

[0012] Preferably, the motor is a servo motor.

[0013] Preferably, it also includes a tension sensor and a tension controller, wherein the tension sensor is installed on the inner wall of the box, and the tension sensor is used to detect the tension of the fiber bundle in the box. The tension sensor and the servo motor are both electrically connected to the tension controller, and the tension controller is used to receive the tension data after the tension sensor detects the tension of the fiber bundle, and is used to control the rotation of the rotating shaft of the servo motor.

[0014] Preferably, the servo motor and the ball screw are each provided with four groups, and the four groups of servo motors and the four groups of ball screws are arranged in one-to-one correspondence. Two groups of servo motors and two groups of ball nuts are respectively installed at both ends of the box body. Two guide rods are provided, and the two guide rods are respectively installed on both sides of the fixed rod, and the four ends of the two guide rods are respectively fixedly connected with the nuts of the four groups of ball screws in one-to-one correspondence.

[0015] Preferably, a slide groove is provided on the inner side wall of the box body, the notch of the slide groove is arranged along the height direction of the box body, and the nut of the ball screw is slidably installed in the slide groove.

[0016] The present invention also provides a control method for a prepreg fiber anti-twisting yarn mechanism, comprising the following steps:

[0017] The tension controller stores threshold data of preset fiber tension;

[0018] The real-time fiber tension of the fiber when sliding over the fixed rod is detected by a tension sensor, and real-time fiber tension data is formed;

[0019] The tension controller obtains real-time fiber tension data and matches the real-time fiber tension data with the threshold data. If the threshold data is greater than the real-time fiber tension data, the tension controller controls the servo motor to start and drives the guide rod to move to the bottom of the box; if the threshold data is less than the real-time fiber tension data, the tension controller controls the start and drives the guide rod to move to the top of the box.

[0020] Compared with the prior art, the beneficial effects of this solution are:

[0021] 1. Through the setting of the driving component and the lifting component, when the tension of the fiber bundle is insufficient, the driving component is started, and the driving part of the driving component drives the lifting component to make the lifting part of the lifting component rise or fall, thereby driving the guide rod to move up and down through the lifting component, so that the guide rod increases or shortens the moving length of the fiber bundle in the box, thereby adjusting the fiber tension on the guide rod and the fixed rod, thereby avoiding the twisting of the fiber, thereby ensuring that the fiber can be flatter and can stably spread the yarn.

[0022] 2. Through the setting of tension sensor and tension controller, when the fiber passes through the guide rod and the fixed rod, the tension sensor monitors the tension of the fiber in real time and feeds back to the tension controller. The tension controller then controls the rotation of the servo motor, thereby driving the guide rod to move through the nut of the ball screw, extending or shortening the sliding length of the fiber bundle in the box, thereby controlling the fiber tension and avoiding the twisting of the fiber.

[0023] 3. By setting the threshold data of the afternoon tension in the tension controller, the fiber tension is obtained in real time through the tension controller to form real-time fiber tension data. The tension controller matches the real-time fiber tension data with the threshold data, so that the tension controller can control the servo motor in real time, thereby facilitating real-time adjustment of the height of the guide rod and controlling the sliding length of the fiber bundle in the box, thereby ensuring the uniformity of the fiber tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0025] Figure 1It is a schematic diagram of the overall structure of a first embodiment of a prepreg fiber anti-twisting yarn mechanism of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall structure of a second embodiment of a prepreg fiber anti-twisting yarn mechanism of the present invention;

[0027] Figure 3 It is a left side cross-sectional structural schematic diagram of a prepreg fiber anti-twisting yarn mechanism of the present invention;

[0028] Figure 4 The present invention is a structural block diagram of a prepreg fiber anti-twisting yarn mechanism connected to a tension controller.

[0029] Reference numerals:

[0030] Box body 1, opening 11, slide slot 12, drive assembly 2, motor 21, lifting assembly 3, ball screw 31, guide rod 4, fixing rod 5, tension sensor 6, tension controller 7. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0032] Embodiment 1

[0033] See also Figure 1 A prepreg fiber anti-twisting yarn mechanism includes a box body 1, a driving component 2, a lifting component 3, a guide rod 4 and a fixing rod 5.

[0034] The top of the box body 1 is provided with an opening 11 for feeding and discharging fiber bundles. The driving assembly 2 is installed at the top of one side wall of the box body 1. In this embodiment, the driving assembly 2 is a motor 21, and the driving end of the driving assembly 2 is the rotating shaft of the motor 21. The motor 21 is installed at the top of the right side wall of the box body 1, and the rotating shaft of the motor 21 is coaxially fixedly connected with the top of the lifting assembly 3.

[0035] The lifting assembly 3 is installed in the box body 1, and the top of the lifting assembly 3 is connected to the driving end of the driving assembly 2. In this embodiment, the lifting assembly 3 is a ball screw 31. At the same time, the lifting assembly 3 can also use a ball screw bearing. The lifting end of the lifting assembly 3 is the nut of the ball screw 31, and the nut of the ball screw 31 is slidably installed on the inner wall of the box body 1 along the height direction of the box body 1. The screw of the ball screw 31 is coaxially fixedly connected with the rotating shaft of the motor 21, and the nut of the ball screw 31 is connected to the end of the guide rod 4. The screw of the ball screw 31 is driven to rotate by the rotating shaft of the motor 21, so that the nut of the ball screw 31 is moved up or down through the screw, thereby improving the movement accuracy of the guide rod 4.

[0036] Among them, the guide rod 4 and the fixed rod 5 are arranged in parallel and are both installed in the box body 1 along the length direction of the box body 1. There is a gap between the guide rod 4 and the fixed rod 5, and there is a gap between the circumferential surface of the guide rod 4 and the circumferential surface of the fixed rod 5 and the inner wall of the box body 1. The guide rod 4 can be selected as a cylinder. After the fiber bundle enters the box body 1, the fiber bundle slides on the outer surface of the guide rod 4 and the outer surface of the fixed rod 5. In this embodiment, the motor 21 and the ball screw 31 are each provided with four groups, and the four groups of motors 21 and the four groups of ball screws 31 are arranged one by one. Two groups of motors 21 and two groups of ball nuts are respectively installed at both ends of the box body 1. There are two guide rods 4, and the two guide rods 4 are respectively installed on both sides of the fixed rod 5. The four ends of the two guide rods 4 are respectively fixedly connected with the nuts of the four groups of ball screws 31 in one-to-one correspondence. The two guide rods 4 can better and more quickly adjust the length of the fiber bundle in the box body 1.

[0037] The right end of the guide rod 4 is fixedly connected to the nut of the ball screw 31 by bolts. When the motor 21 is in working state, the nut of the ball screw 31 can drive the guide rod 4 to slide along the height direction of the box body 1, and the guide rod 4 and the fixed rod 5 are both used to form a slidable tension fit with the fiber tow. The height of the guide rod 4 is adjusted by the ball screw 31, so that the fiber tow is in a sliding tension fit with the box body 1.

[0038] The fiber bundle enters the box body 1 from the opening 11 of the box body 1, and the fiber bundle slides through the guide rod 4 and the fixed rod 5. When the tension of the fiber on the guide rod 4 or the fixed rod 5 is insufficient, the motor 21 is started, and the motor 21 drives the ball screw 31, so that the nut of the ball screw 31 rises or falls, thereby driving the guide rod 4 to rise or fall through the ball screw 31, thereby enhancing the tension between the fiber bundle and the guide rod 4 and the fixed rod 5, so that the guide rod 4 and the fixed rod 5 are in a tensioned state with the fiber, thereby preventing the fiber from becoming twisted.

[0039] Embodiment 2

[0040] Based on Example 1, please refer to Figure 2-Figure 4 , the difference of this embodiment is:

[0041] The guide rod 4 has an arc-shaped edge, which is parallel to the axis of the fixed rod 5, and the edge is used to be in a slidable tension fit with the fiber bundle. In this embodiment, the guide rod 4 uses a triangular prism, and the left and right ends of the triangular prism are in a sliding fit with the inner wall of the box body 1, and one or two edges of the triangular prism can be in a slidable tension fit with the fiber bundle. The edges of the triangular prism are in a sliding fit with the fiber bundle, so that it is convenient to form a corner for the fiber bundle and adjust the moving direction of the fiber bundle, which not only prevents the fiber bundle from being twisted in the box body 1, but also facilitates the adjustment of the length of the fiber bundle in the box body 1.

[0042] Meanwhile, the motor 21 is a servo motor 21. Please refer to Figure 1 and Figure 4 In this embodiment, a tension sensor 6 and a tension controller 7 are also included. The tension sensor 6 can be a Longlv LCZ-401C tension sensor 6, and the tension controller 7 can be a ZXT-A-600 automatic tension controller 7. The tension sensor 6 is mounted on the inner wall of the box 1, and the top end of the tension sensor 6 is clamped on the bottom end of the fixing rod 5. The tension sensor 6 is used to detect the tension of the fiber bundle in the box 1.

[0043] In this embodiment, the tension controller 7 is embedded and installed on the outer surface of the box body 1. At the same time, the tension controller 7 can also be placed on one side of the box body 1. The tension sensor 6 and the servo motor 21 are both electrically connected to the tension controller 7 by wire connection. The tension controller 7 is used to receive the tension data obtained after the tension sensor 6 detects the tension of the fiber tow, and is used to control the rotation of the rotating shaft of the servo motor 21.

[0044] Through the setting of the tension sensor 6 and the tension controller 7, when the fiber passes through the guide rod 4 and the fixed rod 5, the tension sensor 6 monitors the tension of the fiber in real time and feeds back to the tension controller 7. The tension controller 7 then controls the rotation of the servo motor 21, thereby realizing the movement of the guide rod 4 through the nut of the ball screw 31, extending or shortening the sliding length of the fiber bundle in the box 1, thereby controlling the fiber tension and avoiding the fiber from becoming twisted.

[0045] The present invention also provides a control method for a prepreg fiber anti-twisting yarn mechanism, comprising the following steps:

[0046] Step 1: Preset threshold data of fiber tension is stored in the tension controller 7.

[0047] Step 2: Detect the real-time fiber tension of the fiber when it slides over the fixed rod 5 through the tension sensor 6, and generate real-time fiber tension data.

[0048] Step three, the tension controller 7 obtains real-time fiber tension data and matches the real-time fiber tension data with the threshold data. If the threshold data is greater than the real-time fiber tension data, the tension controller 7 controls the servo motor 21 to start and drives the guide rod 4 to move to the bottom of the box 1; if the threshold data is less than the real-time fiber tension data, the tension controller 7 controls the start and drives the guide rod 4 to move to the top of the box 1.

[0049] Through the above steps, the tension controller 7 obtains the fiber tension in real time to form real-time fiber tension data. The tension controller 7 matches the real-time fiber tension data with the threshold data, so that the tension controller 7 can control the servo motor 21 in real time, thereby facilitating real-time adjustment of the height of the guide rod 4, and facilitating control of the sliding length of the fiber bundle in the box body 1, so as to achieve a more uniform fiber tension discharged from the box body 1, thereby improving the production speed and quality of the prepreg.

[0050] Embodiment 3

[0051] Based on the first embodiment, the difference of this embodiment is that:

[0052] Four slide grooves 12 are provided on the inner side wall of the box body 1, and the notches of the four slide grooves 12 are arranged along the height direction of the box body 1. The four ball screws 31 are respectively located in the four slide grooves 12, and the nuts of the ball screws 31 are slidably installed in the slide grooves 12. The ball screw 31 slides in the slide grooves 12, and the slide grooves 12 limit the nuts of the ball screw 31, and also prevent the fibers from being entangled on the ball screw 31, so as to prevent the fibers from being twisted.

[0053] At the same time, the guide rod 4 is a quadrangular prism, and the left and right ends of the quadrangular prism are in sliding cooperation with the inner wall of the box body 1. The quadrangular prism can increase the sliding cooperation with the fiber bundle to form a turning angle, which is convenient for adjusting the moving direction of the fiber bundle multiple times, thereby further preventing the fiber bundle from twisting and achieving a smoother fiber during the yarn spreading process.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A prepreg fiber anti-twisting yarn mechanism, characterized in that: It comprises a box body (1), a driving assembly (2), a lifting assembly (3), a guide rod (4) and a fixing rod (5); The box (1) is provided with an opening (11) for feeding and discharging fiber bundles, the driving assembly (2) is mounted on the top of a side wall of the box (1), the lifting assembly (3) is mounted in the box (1), the top of the lifting assembly (3) is connected to the driving end of the driving assembly (2), the guide rod (4) and the fixed rod (5) are parallel and both mounted in the box (1), there is a gap between the guide rod (4) and the fixed rod (5), the guide rod (4) is connected to the lifting end of the lifting assembly (3), when the driving end of the driving assembly (2) is in a working state, the lifting end of the lifting assembly (3) can drive the guide rod (4) to slide along the height direction of the box (1), and the guide rod (4) and the fixed rod (5) are both used to be in a slidable tensioning fit with the fiber bundle; The driving assembly (2) comprises a motor (21), the driving end of the driving assembly (2) being a rotating shaft of the motor (21), the motor (21) being mounted on a top end of a side wall of the box body (1), and the rotating shaft of the motor (21) being coaxially connected to a top end of the lifting assembly (3); The lifting assembly (3) comprises a ball screw (31), the lifting end of the lifting assembly (3) being a nut of the ball screw (31), the nut of the ball screw (31) being slidably mounted on the inner wall of the box body (1) along the height direction of the box body (1), the screw of the ball screw (31) being coaxially fixedly connected to the rotating shaft of the motor (21), and the nut of the ball screw (31) being connected to the end of the guide rod (4); The right end of the guide rod (4) is fixedly connected to the nut of the ball screw (31) by means of bolts, and when the motor (21) is in a working state, the nut of the ball screw (31) can drive the guide rod (4) to slide along the height direction of the box body (1), and the guide rod (4) and the fixed rod (5) are both used to form a slidable tension fit with the fiber bundle; The fiber bundle enters the box body (1) through the opening (11) of the box body 1. After the fiber bundle enters the box body (1), the fiber bundle slides on the outer surface of the guide rod (4) and the outer surface of the fixed rod (5). When the tension of the fiber on the guide rod (4) or the fixed rod (5) is insufficient, the motor (21) is started, and the motor (21) drives the ball screw (31), so that the nut of the ball screw (31) rises or falls, thereby driving the guide rod (4) to rise or fall through the ball screw (31), thereby increasing the tension between the fiber bundle and the guide rod (4) and the fixed rod (5), so that the guide rod (4) and the fixed rod (5) are in a tensioned state with the fiber, thereby preventing the fiber from becoming twisted. The invention also comprises a tension sensor (6) and a tension controller (7). The tension sensor (6) is mounted on the inner wall of the box (1). The tension sensor (6) is used to detect the tension of the fiber bundle in the box (1). The tension sensor (6) and the servo motor are both electrically connected to the tension controller (7). The tension controller (7) is used to receive tension data after the tension sensor (6) detects the tension of the fiber bundle, and is used to control the rotation of the rotating shaft of the servo motor. When the fiber passes through the guide rod (4) and the fixed rod (5), the tension sensor (6) monitors the tension of the fiber in real time and feeds back to the tension controller (7). The tension controller (7) then controls the rotation of the servo motor (21), thereby driving the guide rod (4) to move through the nut of the ball screw (31), extending or shortening the sliding length of the fiber bundle in the box (1), thereby controlling the fiber tension and preventing the fiber from twisting.

2. The prepreg fiber anti-twisting yarn mechanism according to claim 1, characterized in that: The guide rod (4) has an edge with a circular arc angle, the edge is parallel to the axis of the fixing rod (5), and the edge is used to be in a slidable tensioning fit with the fiber bundle.

3. The prepreg fiber anti-twisting yarn mechanism according to claim 2, characterized in that: The guide rod (4) is a triangular prism or a quadrangular prism.

4. The prepreg fiber anti-twisting yarn mechanism according to claim 1 or 2, characterized in that: The motor (21) is a servo motor.

5. The prepreg fiber anti-twisting yarn mechanism according to claim 1, characterized in that: The servo motors and ball screws (31) are each provided with four groups, and the four groups of servo motors and the four groups of ball screws (31) are arranged in a one-to-one correspondence. Two groups of servo motors and two groups of ball nuts are respectively installed at both ends of the box body (1). Two guide rods (4) are provided, and the two guide rods (4) are respectively installed on both sides of the fixed rod (5). The four ends of the two guide rods (4) are respectively fixedly connected with the nuts of the four groups of ball screws (31) in a one-to-one correspondence.

6. The prepreg fiber anti-twisting yarn mechanism according to claim 5, characterized in that: The inner side wall of the box body (1) is provided with a slide groove (12), the notch of the slide groove (12) is arranged along the height direction of the box body (1), and the nut of the ball screw (31) is slidably installed in the slide groove (12).

7. A control method for a prepreg fiber anti-twisting yarn mechanism according to any one of claims 1 to 6, characterized in that: The following steps are involved: The tension controller stores threshold data of preset fiber tension; The real-time fiber tension of the fiber when sliding over the fixed rod is detected by a tension sensor, and real-time fiber tension data is formed; The tension controller obtains real-time fiber tension data and matches the real-time fiber tension data with the threshold data. If the threshold data is greater than the real-time fiber tension data, the tension controller controls the servo motor to start and drives the guide rod to move to the bottom of the box; if the threshold data is less than the real-time fiber tension data, the tension controller controls the start and drives the guide rod to move to the top of the box.

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