Method for improving the detection sensitivity of broken yarns of ultrafine electronic glass fibers

Abstract

The present application relates to the technical field of broken yarn detection, and particularly relates to a method for improving the sensitivity of broken yarn detection of superfine electronic glass fiber. The method comprises the following steps: (1) reducing the movement range of the yarn, and reducing the yarn guide channel diameter of the yarn guide hook, so that the movement range of the yarn is reduced; (2) changing the connection mode of the yarn guide hook and the yarn guide. By changing the channel diameter of the yarn guide hook and reducing the movement range of the yarn, the sensitivity of the inductor is improved; by changing the connection mode of the yarn guide hook and the yarn guide mounting plate, the yarn guide hook can be adjusted at any time, the movement form of the yarn is changed, and the sensitivity of the inductor is further improved.

Description

Technical Field

[0001] This invention relates to the field of yarn breakage detection technology, and in particular to a method for improving the sensitivity of yarn breakage detection in ultrafine electronic glass fibers. Background Technology

[0002] In the untwisting and twisting process of yarn production, a yarn breakage sensor needs to be installed on the yarn path. The sensor detects whether the yarn has broken during untwisting. If a breakage is detected, the spindle and yarn cake holder motors stop operating in tandem to prevent equipment damage and yarn breakage / fuzzing. Electronic-grade glass fiber is a type of glass fiber with a diameter generally less than or equal to 9 micrometers, most commonly 9, 7, and 5 micrometers. With technological advancements, electronic products are becoming increasingly thinner, lighter, and smaller, leading to the development of electronic glass fibers with higher requirements and finer diameters, such as 4, 3, and 5 micrometers. BC3000 / BC3400 ultrafine yarn has a monofilament diameter of 4.1 μm and 40-50 fibers per filament. As the yarn becomes increasingly finer, the original guide hooks, with an inner diameter of 15-16 mm, cause the yarn to rotate within the guide hook, making it difficult for the yarn breakage sensor to detect. This results in spindle stoppages, affecting the full-bore rate and causing yarn cake waste. Therefore, a method to improve the sensitivity of the yarn breakage detection sensor is needed. Summary of the Invention

[0003] The purpose of this invention is to provide a method for improving the sensitivity of yarn breakage detection in ultrafine electronic glass fibers. This method can improve the sensitivity of the yarn breakage sensor to ultrafine electronic glass fibers, improve the problem of sensor false stop, increase the full tube rate of ultrafine yarn, and reduce yarn cake waste.

[0004] This invention provides a method for improving the detection sensitivity of broken yarn in ultrafine electronic glass fiber, comprising the following steps: (1) reducing the range of yarn movement. After the glass fiber filament is unloaded from the yarn frame, it passes through the yarn guide hook and nylon hook on the yarn guide in sequence and finally winds around the yarn tube. The diameter of the yarn guide channel of the yarn guide hook is reduced, thereby reducing the range of yarn movement.

[0005] (2) Change the connection method between the yarn guide hook and the yarn guide. The yarn guide is provided with an installation plate and a connecting block. The installation end of the yarn guide hook is inserted into the connecting block. The connecting block is provided with a set screw. The set screw is threadedly connected to the connecting block. The set screw is in close contact with the installation end of the yarn guide hook.

[0006] Preferably, the diameter of the yarn guide channel of the yarn guide hook in step (1) is 7-8 mm.

[0007] Preferably, the yarn guide hook includes a mounting rod, one end of which is fixedly connected to a connecting rod, and the end of the connecting rod away from the mounting rod is provided with a yarn guide rod, the end of which is close to the connecting rod is wound into a ring to form the yarn guide channel.

[0008] Preferably, the central axis of the mounting rod is aligned with the center line of the yarn guide channel.

[0009] Preferably, the mounting plate is provided with a connecting block mounting hole, the connecting block is provided in the connecting block mounting hole, and the set screw is threaded onto the connecting block; the top of the mounting plate is provided with a yarn guide hook mounting hole, the yarn guide hook mounting hole is in communication with the connecting block mounting hole; the mounting rod of the yarn guide hook passes through the yarn guide hook mounting hole and is inserted into the connecting block.

[0010] Preferably, the connecting block is a hollow cylinder, and a through hole is provided on the side wall of the connecting block. The mounting rod passes through the yarn guide hook mounting hole and the through hole and extends into the interior of the connecting block.

[0011] Preferably, the yarn guide hook is made of chrome-plated metal.

[0012] In summary, the present invention has the following advantages:

[0013] The technical solution provided by this invention reduces the range of yarn movement and improves the sensitivity of the sensor by changing the diameter of the yarn guide channel of the yarn guide hook; by changing the connection method between the yarn guide hook and the yarn guide mounting plate, the yarn guide hook can be adjusted at any time to change the movement pattern of the yarn, further improving the sensitivity of the yarn breakage sensor, improving the problem of sensor false stop, increasing the full tube rate of ultrafine yarn, and reducing yarn cake waste. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the yarn installation position in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the yarn guide hook in an embodiment of the present invention;

[0017] Figure 3 This is a front view of the yarn guide hook in an embodiment of the present invention;

[0018] Figure 4 This is a side view of the yarn guide hook in an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram showing the connection between the yarn guide hook and the mounting plate in an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the mounting plate in an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the connecting block in an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1-yarn frame, 2-yarn tube, 3-yarn guide, 4-nylon hook, 5-air ring, 6-yarn guide hook, 601-mounting rod, 602-connecting rod, 603-yarn guide rod, 604-yarn guide channel, 7-mounting plate, 701-yarn guide hook mounting hole, 702-connecting block mounting hole, 8-set screw, 9-connecting block, 901-through hole, 902-set screw mounting hole, 903-thread. Detailed Implementation

[0023] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] Example

[0027] A method for improving the sensitivity of yarn breakage detection in ultrafine electronic glass fibers includes the following steps:

[0028] (1) To reduce the range of motion of the yarn, after the glass fiber filament is unloaded from the yarn frame 1, it passes through the yarn guide hook 6 and nylon hook 4 on the yarn guide 3 in sequence and finally winds around the yarn tube 2. The diameter of the yarn guide channel 604 of the yarn guide hook 6 is reduced, thereby reducing the range of motion of the yarn and narrowing the air ring on the air ring ring (5); wherein the yarn guide hook 6 includes a mounting rod 601, such as Figure 2-4 As shown, a connecting rod 602 is fixedly connected to one end of the mounting rod 601. A yarn guide rod 603 is provided at the end of the connecting rod 602 away from the mounting rod 601. The end of the yarn guide rod 603 near the connecting rod 602 is wound into a ring to form a yarn guide channel 604, with a diameter of 7.5mm. The central axis of the mounting rod 601 is aligned with the center line of the yarn guide channel 604. The yarn guide hook 6 is made of chrome-plated metal to improve wear resistance.

[0029] (2) The connection method between the yarn guide hook 6 and the yarn guide 3 is changed. The yarn guide 3 is equipped with a mounting plate 7. The traditional connection method between the yarn guide hook 6 and the mounting plate 7 is a threaded connection, which is not convenient for adjusting the position of the yarn guide hook 6 at any time. In this embodiment, a set screw connection is used, such as... Figure 5 As shown, specifically as follows: The mounting plate 7 is provided with connecting block mounting holes 702, such as... Figure 6 As shown, a connecting block 9 is fixed in the connecting block mounting hole 702; in this embodiment, the connecting block 9 is a hollow cylinder, as shown... Figure 7 As shown, the side wall of the connecting block 9 has a through hole 901, which communicates with the yarn guide hook mounting hole 701. The top of the mounting plate 7 has a yarn guide hook mounting hole 701. The mounting rod 601 of the yarn guide hook 6 passes through the yarn guide hook mounting hole 701 and the through hole 901 and is inserted into the interior of the connecting block 9. The top of the connecting block 9 has a set screw mounting hole 902, and the interior of the connecting block 9 has a thread 903. The set screw 8 is threadedly connected to the connecting block 9, and the set screw 8 is in close contact with the mounting rod 601. In use, loosening the set screw 8 and gently rotating the mounting rod 601 can adjust the yarn guide hook 6. After adjustment, simply tighten the set screw 8. The operation is simple and convenient.

[0030] Under normal production conditions, the yarn rotates within the yarn guide hook, and the yarn breakage sensor light is off. The yarn breakage sensor detects yarn movement and will not stop the spindle. When the yarn stops moving or breaks, the yarn breakage sensor activates, detecting the breakage, illuminating the red light, and stopping the spindle and yarn cake holder. When producing microfiber yarn, because the yarn is very thin, if it moves on a large-diameter yarn guide hook, the machine may misjudge a yarn breakage, causing the spindle and yarn cake holder to stop, resulting in production waste. The method provided by this invention reduces the diameter of the yarn guide channel of the yarn guide hook, decreasing the range of yarn movement and improving the sensor's sensitivity. By changing the connection method between the yarn guide hook and the mounting plate, the position of the yarn guide hook can be adjusted at any time, further improving the sensor's sensitivity and preventing the sensor from failing to detect yarn, thus avoiding spindle stoppages that affect the full tube yield and reducing yarn cake waste.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for improving the sensitivity of yarn breakage detection in ultrafine electronic glass fibers, characterized in that, The steps include: (1) reducing the range of motion of the yarn. After the glass fiber filament is unloaded from the yarn frame (1), it passes through the yarn guide hook (6) and nylon hook (4) on the yarn guide (3) in sequence and finally wraps around the yarn tube (2). The diameter of the yarn guide channel (604) of the yarn guide hook (6) is reduced, so that the range of motion of the yarn is reduced. (2) Change the connection method between the yarn guide hook (6) and the yarn guide (3). The yarn guide (3) is provided with a mounting plate (7) and a connecting block (9). The mounting end of the yarn guide hook (6) is inserted into the connecting block (9). The connecting block (9) is provided with a set screw (8). The set screw (8) is threadedly connected to the connecting block (9). The set screw (8) is in close contact with the mounting end of the yarn guide hook (6). The diameter of the yarn guide channel (604) of the yarn guide hook (6) in step (1) is 7-8 mm; The yarn guide hook (6) includes a mounting rod (601), one end of which is fixedly connected to a connecting rod (602). The end of the connecting rod (602) away from the mounting rod (601) is provided with a yarn guide rod (603). The end of the yarn guide rod (603) near the connecting rod (602) is wound into a ring to form the yarn guide channel (604). The mounting plate (7) is provided with a connecting block mounting hole (702), and the connecting block (9) is provided in the connecting block mounting hole (702). The connecting block (9) is threaded with the set screw (8). The top of the mounting plate (7) is provided with a yarn guide hook mounting hole (701), and the yarn guide hook mounting hole (701) communicates with the connecting block mounting hole (702). The mounting rod (601) of the yarn guide hook (6) passes through the yarn guide hook mounting hole (701) and is inserted into the connecting block (9). The connecting block (9) is a hollow cylinder. A through hole (901) is provided on the side wall of the connecting block (9). The mounting rod (601) passes through the yarn guide hook mounting hole (701) and the through hole (901) and extends into the interior of the connecting block (9).

2. The method according to claim 1, characterized in that, The central axis of the mounting rod (601) is aligned with the center line of the yarn guide channel (604).

3. The method according to claim 1, characterized in that, The yarn guide hook (6) is made of chrome-plated metal.

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