Core yarn unwinding control module for single-spindle covering yarn of rotor spinning machine

Abstract

The utility model belongs to a rotor spinning machine, and particularly relates to a core yarn backing-off control module for single-spindle covering yarn of the rotor spinning machine, each spindle of the rotor spinning machine is provided with a core yarn backing-off control module, and each core yarn backing-off control module comprises a single-spindle control part and a yarn backing-off motor driving part. The single spindle control part is connected with the wire withdrawing motor driving part, the wire withdrawing motor driving part is connected with a wire withdrawing starting button, and the wire withdrawing starting button is connected with a wire withdrawing motor; the single-spindle control part is connected with a yarn detection sensor and a low-speed yarn detector through a signal converter, the yarn detection sensor is connected with a control button, the control button is connected with a cotton feeding motor, and the cotton feeding motor is connected with the single-spindle control part; according to the utility model, each spindle of the rotor spinning machine is provided with one core yarn unwinding control module, so that the requirement of the rotor spinning machine for single-spindle core-spun yarn spinning is met.

Description

Technical Field

[0001] This utility model pertains to rotor spinning machines, specifically relating to a core yarn unwinding control module for single-spindle core-spun yarn in rotor spinning machines. Background Technology

[0002] Core-spun yarn is a composite yarn composed of two or more fibers, one of which is a filament or staple fiber, and the other is a core or mother yarn. This composite structure gives core-spun yarn excellent performance. Existing rotor spinning machines typically use a collective drive method when spinning core-spun yarn, meaning that a motor is installed only at the head or tail of the spinning machine, and the motor controls all the core-spun yarn mechanisms on the spinning machine to start working. Alternatively, a clutch is installed on each core-spun yarn mechanism on the spinning machine, and the clutch controls the feeding of the core-spun yarn to a single spindle. However, this method is prone to malfunctions when the clutch engages during the spinning machine's operation, causing the core-spun yarn mechanism to malfunction. Furthermore, controlling the core-spun yarn to a single spindle via a clutch cannot stop the machine in time if the core yarn breaks, resulting in yarn without a core yarn and affecting yarn quality. Summary of the Invention

[0003] The purpose of this invention is to provide a core yarn unwinding control module for single-spindle core-spun yarn on a rotor spinning machine, which can realize single-spindle control of core yarn unwinding.

[0004] The technical solution of this utility model is as follows: a core yarn unwinding control module for single-spindle core-spun yarn in a rotor spinning machine. Each spindle of the rotor spinning machine is equipped with a core yarn unwinding control module. Each core yarn unwinding control module includes a single-spindle control part and a unwinding motor drive part. The single-spindle control part is connected to the unwinding motor drive part, and the unwinding motor drive part is connected to an unwinding start button and an unwinding motor. The single-spindle control part is connected to a yarn detection sensor and a low-speed yarn detector through a signal converter. The yarn detection sensor is connected to a control button, and the control button is connected to a cotton feeding motor, which is connected to the single-spindle control part.

[0005] Furthermore, the single-spindle control unit is connected to the unwinding motor drive unit via an RS485 communication bus and an ST2 communication line. The unwinding motor drive unit is connected to the unwinding start button via the ST2 communication line. The unwinding motor drive unit transmits the stop unwinding signal and the start core yarn feeding signal to the single-spindle control unit and the unwinding start button via the ST2 communication line, respectively.

[0006] Furthermore, the single-spindle control unit is connected to the yarn-falling electromagnet and the doffing cylinder of the rotor spinning machine.

[0007] Furthermore, the single-spindle control unit is internally configured with parameter information for the fast-forward speed, pre-feed speed, splicing speed, and compensation speed of the cotton feeding motor during operation, and internally configured with parameter information for the fast-forward length, pre-feed length, splicing length, and compensation length of the cotton sliver.

[0008] Furthermore, the control button is connected to an indicator light.

[0009] The beneficial effects of this utility model are as follows: By setting a core yarn unwinding control module on each spindle of the rotor spinning machine, the single-spindle core yarn spinning requirement of the rotor spinning machine is met; the core yarn unwinding of each spindle is completed by a separate unwinding motor, achieving single-spindle single-control of core yarn unwinding; the single-spindle control part can detect and control the action of the unwinding motor in real time through the unwinding motor drive part; the running speed of the unwinding motor can be sent to the unwinding motor drive part in real time through the single-spindle control part according to the actual situation, realizing stepless adjustment of the yarn tension multiple; the signal converter converts the signal of the low-speed yarn probe into a normally closed switch signal and inserts it into the circuit of the yarn probe sensor and the single-spindle control part, so that if either the low-speed yarn probe or the yarn probe sensor produces a yarn breakage signal, the signal can be effectively input to the single-spindle control part, so that the single-spindle control part controls the cotton feeding motor to perform the yarn breakage action, ensuring that there is always a core yarn in the yarn. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the working process of this utility model. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 of this utility model. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0014] Since rotor spinning machines typically use a collective drive method when spinning core-spun yarn, i.e., a motor is installed only at the head or tail of the spinning machine, and the motor controls all the core-spun yarn mechanisms on the spinning machine to start working; or a clutch is installed on each core-spun yarn mechanism on the spinning machine, and the clutch controls the feeding of the core-spun yarn of a single spindle. However, the method of controlling the core-spun yarn of a single spindle by clutch cannot stop in time when the core yarn breaks, resulting in no core yarn in the yarn and affecting the yarn quality; in view of this, this application provides a core yarn unwinding control module for single spindle core-spun yarn of rotor spinning machines, which can realize single spindle control of core yarn unwinding.

[0015] like Figure 1 As shown, the core yarn unwinding control module for a single spindle of a rotor spinning machine is provided on each spindle. Each core yarn unwinding control module includes a single spindle control part 1 and a unwinding motor drive part 2. The single spindle control part 1 is connected to the unwinding motor drive part 2. The unwinding motor drive part 2 is connected to an unwinding start button 21 and an unwinding motor. The single spindle control part 1 is connected to a yarn detection sensor 11 and a low-speed yarn detector 12 through a signal converter 14. The yarn detection sensor 11 is connected to a control button 13. The control button 13 is connected to a cotton feeding motor, which is connected to the single spindle control part 1.

[0016] Based on the above embodiments, the low-speed yarn detector 12 can detect low-speed chemical fiber yarns with core yarn speeds as low as 20m / min. The signal converter 14 converts the signal from the low-speed yarn detector 12 into a normally closed switch signal, which is then fed into the circuit between the yarn detection sensor 11 and the single-spindle control unit 1. This ensures that if either the low-speed yarn detector 12 or the yarn detection sensor 11 experiences a yarn breakage signal, the signal will be effectively transmitted to the single-spindle control unit 1, causing the single-spindle control unit 1 to control the cotton feeding motor to perform the yarn breakage action. Each spindle is equipped with a core yarn unwinding control module to meet the single-spindle spinning core yarn requirements of the rotor spinning machine. The unwinding of the core yarn on each spindle is completed by a separate unwinding motor, achieving single-spindle single-control of core yarn unwinding. The single-spindle control unit 1 can detect and control the action of the unwinding motor in real time through the unwinding motor drive unit 2. The running speed of the unwinding motor can be sent to the unwinding motor drive unit 2 in real time through the single-spindle control unit 1 according to the actual situation, achieving stepless adjustment of the yarn tension ratio.

[0017] The single-spindle control unit 1 is connected to the unwinding motor drive unit 2 via an RS485 communication bus and an ST2 communication line. The unwinding motor drive unit 2 is connected to the unwinding start button 21 via the ST2 communication line. The unwinding motor drive unit 2 transmits the unwinding motor running speed information to the single-spindle control unit 1 via the RS485 communication bus. The unwinding motor drive unit 2 transmits the stop unwinding signal and the start core yarn feeding signal to the single-spindle control unit 1 and the unwinding start button 21 respectively via the ST2 communication line. When the unwinding start button 21 is pressed, the unwinding start button 21 controls the operation and stop of the unwinding motor through the unwinding motor drive module 2.

[0018] Based on the above embodiments, when the single-spindle control unit 1 transmits the information on the running speed of the unwinding motor to the unwinding motor drive unit 2 via the RS485 communication bus, the unwinding motor drive unit 2 sends a signal to the unwinding start button 21. The unwinding start button 21 controls the unwinding motor to start running at a set speed. The unwinding motor drive unit 2 transmits the information on the running speed of the unwinding motor to the single-spindle control unit 1 via the RS485 communication bus, enabling the single-spindle control unit 1 to monitor the running speed of the unwinding motor in real time.

[0019] Specifically, the single-spindle control unit 1 is connected to the yarn-feeding electromagnet and the doffing cylinder of the rotor spinning machine; the single-spindle control unit 1 is internally equipped with parameter information of the fast-forward speed, pre-feed speed, splicing speed and compensation speed of the cotton feeding motor, and the single-spindle control unit 1 is internally equipped with parameter information of the fast-forward length, pre-feed length, splicing length and compensation length of the cotton sliver.

[0020] Preferably, the control button 13 is connected to an indicator light.

[0021] Based on the above embodiments, both the yarn-falling electromagnet and the doffing cylinder are commonly used devices in rotor spinning machines, and are not specifically described in this utility model.

[0022] The working principle of this utility model is as follows: When the low-speed yarn probe 12 detects a core yarn breakage, the low-speed yarn probe 12 sends a core yarn breakage signal to the signal converter 14. After receiving the core yarn breakage signal, the signal converter 14 sends a stop spinning signal to the single spindle control unit 1; when the yarn probe sensor 11 detects a yarn breakage, the yarn probe sensor 11 sends a yarn breakage signal to the signal converter 14. After receiving the yarn breakage signal, the signal converter 14 sends a stop spinning signal to the single spindle control unit 1.

[0023] When the single spindle control unit 1 receives the stop spinning signal, the single spindle control unit 1 transmits the signal to the unwinding motor drive module 2 through the RS485 communication bus. The unwinding motor drive module 2 stops the unwinding motor through the unwinding start button 21. At this time, the spun bobbin can be removed from the rotor spinning machine and replaced with a new spinning bobbin.

[0024] Press and hold the control button 13 on the yarn probe sensor 11 for a long time. After the set time has elapsed, the cotton sliver will be fed rapidly into the combing zone of the rotor spinning machine.

[0025] Click the control button 13 on the yarn detection sensor 11, and the single spindle enters the yarn splicing state. The single spindle control unit 1 controls the cotton feeding motor to complete the splicing action according to the following steps:

[0026] S1: The cotton feeding motor feeds the cotton sliver into the carding zone of the rotor spinning machine according to the set fast forward speed and fast forward length;

[0027] S2: The cotton feeding motor forms a fiber ring in the spinning cup according to the set pre-feeding speed and pre-feeding length, completing the preparation work before splicing;

[0028] S3: The cotton feeding motor continuously feeds the fibers into the cotton sliver according to the set splicing speed and splicing length. When the yarn sinking delay is reached, the yarn sinking electromagnet is attracted, and the tail yarn falls into the spinning box. The yarn tail yarn begins to be twisted inside the spinning cup, completing the twisting work at the splicing position.

[0029] S4: The cotton feeding motor continuously feeds the fibers into the cotton sliver according to the set compensation speed and compensation length. When the doffing delay is reached, the doffing cylinder is de-energized, the roller falls, and the tail yarn is drawn out from the spinning box to complete the yarn splicing work. After the splicing is completed, the splice size is adjusted.

[0030] After completing the yarn splicing work, double-click the yarn detector button to enter the core yarn feeding action. The green light on the indicator light on the control button 13 will stay on. The single spindle control part 1 will block the yarn breakage signal sent by the yarn detector sensor 11 until the core yarn feeding delay reaches the set time, and then the single spindle will start to detect the yarn breakage signal.

[0031] After the core yarn feeding action begins, the worker clicks the unwinding start button 21, and the unwinding motor drive unit 2 controls the unwinding motor to run. The unwinding motor feeds the core yarn into the spinning box at a set speed, and the core-spun yarn begins normal spinning.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A core yarn unwinding control module for single-spindle core-spun yarn on a rotor spinning machine, wherein each spindle of the rotor spinning machine is provided with a core yarn unwinding control module, and each core yarn unwinding control module includes a single-spindle control part and a unwinding motor drive part, characterized in that, The single-spindle control unit is connected to the unwinding motor drive unit, which is connected to the unwinding start button and the unwinding motor. The single-spindle control unit is connected to a yarn detection sensor and a low-speed yarn detector via a signal converter. The yarn detection sensor is connected to a control button, which is connected to a cotton feeding motor, which is connected to the single-spindle control unit.

2. The core yarn unwinding control module for single-spindle core-spun yarn on a rotor spinning machine according to claim 1, characterized in that, The single-spindle control unit is connected to the unwinding motor drive unit via an RS485 communication bus and an ST2 communication line. The unwinding motor drive unit is connected to the unwinding start button via the ST2 communication line. The unwinding motor drive unit transmits the stop unwinding signal and the start core yarn feeding signal to the single-spindle control unit and the unwinding start button via the ST2 communication line, respectively.

3. The core yarn unwinding control module for single-spindle core-spun yarn on a rotor spinning machine according to claim 2, characterized in that, The single-spindle control unit is connected to the yarn-falling electromagnet and the doffing cylinder of the rotor spinning machine.

4. The core yarn unwinding control module for single-spindle core-spun yarn on a rotor spinning machine according to claim 3, characterized in that, The single-spindle control unit internally contains parameter information for the fast-forward speed, pre-feed speed, splicing speed, and compensation speed of the cotton feeding motor during operation. The single-spindle control unit internally contains parameter information for the fast-forward length, pre-feed length, splicing length, and compensation length of the cotton sliver.

5. The core yarn unwinding control module for single-spindle core-spun yarn on a rotor spinning machine according to claim 4, characterized in that, The control button is connected to an indicator light.

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