An independent constant tension elastic wire control device

Abstract

The present invention relates to the technical field of textile machinery for sanitary products, an independent constant tension elastic wire control device, provided with a base and a motor, the base is provided with a main driving wheel connected to the motor, one side of the main driving wheel is provided with an anti-winding wheel, one side of the anti-winding wheel is provided with a ceramic wire clamp, the main driving wheel is provided with a pressure sensing component away from the anti-winding wheel, the middle of the pressure sensing component is provided with a hook, the upper end of the hook is connected to a pressure sensing element, both sides of the hook are provided with wire wheels, a circuit board is also provided in the base, and a PLC control system is provided on the circuit board. The purpose of the present invention is to provide an independent constant tension elastic wire control system that can independently control, high-speed, stable, and accurately transmit tension, while reducing production costs and improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of textile machinery for sanitary products, and in particular to an independent constant tension elastic wire material control device. Background Art

[0002] Elastic wires are required in the disposable sanitary products series (such as baby diapers, pull-up pants, adult pull-up pants, etc.). This series of wires is limited by the characteristics of its own materials and raw materials and the production process. The diameter of the wires will be irregular within the same length, and the wires themselves have an elastic structure. If these wires are used in specific products, the quality of all corresponding products produced will also be unstable due to unstable control.

[0003] With the continuous upgrading of production equipment, some high-speed production lines have been successfully developed at this stage, but the control system of this material is still at the control level of 10 years ago (using PLC+servo through AD / DA analog-to-digital conversion, RS232 data communication, or some low-speed controllers). Due to the characteristics of its own combined system structure, it is affected by factors such as poor signals and delayed data transmission. It can no longer adapt to the supporting facilities of modern high-speed production lines, and it also completely limits the production technology quality and stable level of high-speed production that these high-speed production lines should have.

[0004] Based on the reasons of improving production efficiency, reducing production costs, and improving the stability of product production quality in the industry, the inventor has been committed to solving the production difficulties in the industry with more than 20 years of accumulated field equipment production and technical experience. On the basis of the practical patent technology in 2012 (patent number: CN201220675394), further research and development improvements were made, and the integrated control system was successfully developed to optimize the structure of this system. After long-term sample testing and actual matching machine operation verification, it has been effectively verified and confirmed that an independent constant tension elastic wire control system is fully adapted to and matched with existing high-speed production special equipment, and can effectively, quickly and accurately control the constant tension of the elastic wire. Summary of the invention

[0005] The purpose of the present invention is to provide an independent constant tension elastic wire control system that can independently control, deliver tension at high speed, stably and accurately, and reduce production costs and improve production efficiency. In order to achieve the above purpose, the present invention adopts the following technical solution:

[0006] An independent constant tension elastic wire control device, comprising a motor and a base, wherein the motor is fixed inside the base, a main driving wheel connected to the motor by transmission is arranged outside the base, a rotatable anti-winding wheel is arranged on one side of the main driving wheel, a ceramic wire clamp is arranged on one side of the anti-winding wheel, the ceramic wire clamp is fixedly connected to the base through a first bracket, a pressure sensing component contacting and connected to the yarn is arranged on the side of the main driving wheel away from the anti-winding wheel, the pressure sensing component is fixedly connected to the base through a second bracket, a hook is arranged in the middle of the pressure sensing component, the upper end of the hook is connected to the pressure sensing element, and wire wheels are arranged on both sides of the hook;

[0007] A circuit board is also provided in the base, and a PLC control system is provided on the circuit board. The PLC control system includes a CPU operation processor, a temperature sensor, a signal acquisition module, and a signal output module. The pressure sensing component is connected to the sensor module, and the motor is connected to the motor drive module. The signal acquisition module can receive real-time signals from the sensor module and transmit them to the CPU operation processor. The CPU operation processor generates an instruction signal after signal processing and transmits it to the motor drive module through the signal output module. The motor drive module controls the motor to drive the rotation of the main drive wheel, thereby driving the conveyance of the yarn to form a complete cycle process. The temperature sensor is used to detect the operating temperature of the control system.

[0008] Furthermore, a plurality of linear grooves are evenly distributed on the outer surface of the main drive wheel, and the linear grooves are parallel to the central axis of the main drive wheel. Fixing holes for installing screws are provided in the linear grooves, and the fixing holes are symmetrically arranged along the central axis of the main drive wheel. The edges where the linear grooves meet the outer surface of the main drive wheel have rounded corners.

[0009] Furthermore, a plurality of annular grooves are arranged in parallel on the anti-winding wheel, and the bottom and top of the annular grooves are both chamfered.

[0010] Furthermore, the PLC control system is also provided with function buttons and an OLED display screen. The function buttons are arranged below the main drive wheel for setting equipment operating parameters, and the OLED display screen is arranged on one side of the main drive wheel for displaying data.

[0011] Furthermore, the sensor module includes at least one pressure sensor, the signal acquisition module includes at least one signal collector, and the number of the signal collectors is consistent with the number of the pressure sensors.

[0012] Furthermore, the main driving wheel and the anti-winding wheel are both made of wear-resistant plastic material.

[0013] Furthermore, the CPU operation processor is a STMF32F40VET6 processor.

[0014] Furthermore, the motor is a Hall brushless DC motor.

[0015] Compared with the traditional structure, the beneficial effects of the present invention are: the present invention adopts an integrated structural design, does not require external communication signal processing and transmission, and cooperates with the Hall brushless DC motor to quickly and efficiently respond to the instructions issued by the CPU processor; a straight groove structure is designed on the main drive wheel, which can effectively increase the friction between the yarn and the main drive wheel, prevent the yarn from slipping and transportation stagnation, and the fixing hole is set in the straight groove, which not only plays a fixed connection role but also does not interfere with the transportation of the yarn; the anti-winding wheel is designed with a number of annular grooves, which is more effective than the traditional straight rod structure, can stagger the yarn intervals and always keep the position stable, greatly reducing the possibility of yarn winding; the CPU processor adopts the STMF32F40VET6 processor to replace the traditional processor, which helps to avoid the occurrence of signal difference, data transmission lag and other factors affecting the high-speed operation of the equipment; the control system includes at least one pressure sensor and a matching signal collector. When the yarn transportation journey is long, a pressure sensor can be added to ensure that the tension of the yarn transportation remains stable and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the structure of the invention;

[0017] Figure 2 A top view of the present invention;

[0018] Figure 3 It is a schematic diagram of a control system of the present invention;

[0019] Figure 4 A schematic diagram of a preferred embodiment of the control system of the present invention;

[0020] Note in the figure:

[0021] 1-base 2-ceramic clamp 21-first bracket 3-anti-winding wheel 31-annular groove 4-main driving wheel 41-linear groove 42-fixing hole 5-pressure sensing component 51-hook 52-wire wheel 53-second bracket 54-rib 6-circuit board 7-motor 8-yarn 100-PLC control system 110-CPU operation processor 120-signal acquisition module 121-signal collector 1# 122-signal collector 2# 130-temperature sensor 140-function button 150-OLED display screen 160-signal output module 200-motor drive module 500-sensor module 510-pressure sensor 1# 520-pressure sensor 2# 600-switching power supply 700-program write entry 800-multi-axis synchronous communication. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0023] See also Figure 1 , Figure 2 , an independent constant tension elastic wire control device, comprising a motor 7, and a base 1, wherein the base 1 is a box structure with a cavity structure on the inside, the motor 7 is fixed to the inside of the base 1 by bolts, and a main driving wheel 4 connected to the motor 7 is provided on the outside of the base 1, and the motor 7 can drive the main driving wheel 4 to rotate; a rotatable anti-winding wheel 3 is provided on one side of the main driving wheel 4, and the central axis of the anti-winding wheel 3 is on the same horizontal line as the central axis of the main driving wheel 4; a ceramic wire clamp is provided on one side of the anti-winding wheel 3 Device 2, as the entry point of the yarn 8, the ceramic clamp 2 is fixedly connected to the base 1 through a first bracket 21; the main driving wheel 4 is provided with a pressure sensor component 5 for detecting the pressure change during the conveying process of the yarn 8 on the side away from the anti-winding wheel 2, and the pressure sensor component 5 is fixedly connected to the base 1 through a second bracket 53. The second bracket 53 is also provided with a rib 54, which can enhance the structural strength of the second bracket 53 and maintain the stability of the pressure sensor component 5, which helps to improve the accuracy of equipment detection to a certain extent.

[0024] like Figure 1 , Figure 3As shown, the pressure sensing component 5 is in contact with the yarn 8, and the pressure sensing component 5 is provided with a sensor module 500, which can monitor the pressure change of the yarn 8 in real time during the conveying process; the circuit board 6 is equipped with a PLC control system 100, and the PLC control system 100 includes a CPU operation processor 110, a signal acquisition module 120, a temperature sensor 130, a signal output module 160, a function key 140 and an OLED display screen 150. The signal acquisition module 120 can receive the real-time signal from the sensor module 500 and transmit it to the CPU operation processor 110. The CPU operation processor 110 generates an instruction signal after signal processing and transmits it to the motor drive module 200 through the signal output module 160. The motor drive module 200 controls the rotation speed of the main drive wheel 4 through the motor 7, drives the conveying of the yarn 8, and forms a complete cycle process; the temperature sensor 130 is used to detect the operating temperature of the PLC control system 100, which can realize real-time monitoring of the system operation status, provide corresponding information to the technical personnel for reference, and make good records of the operation parameters.

[0025] A hook 51 is provided in the middle of the pressure sensing component 5, and the upper end of the hook 51 is connected to the pressure sensing element. Wire wheels 52 are provided on both sides of the hook 51, and the wire wheels 52 are symmetrically arranged and located on both sides below the hook 51. The conveying path of the yarn 8 passes through the two wire wheels 52 and the hook 51 to form a W-shaped structure. The yarn 8 is hooked on the hook 51. The pressure change of the yarn 8 during the conveying process will cause the hook 51 to move up and down. Therefore, the pressure detection element connected to the hook 51 can obtain the signal change. A circuit board 6 is also provided in the base 1. The circuit board 6 is electrically connected to the motor 7 and the pressure sensing component 5, and can feedback signals and generate commands to control the operation of the device. Function buttons 140 and an OLED display screen 150 are also provided on the base 1. The OLED display screen 150 can intuitively display the set parameters, real-time operating data, and abnormal alarm content.

[0026] Preferably, if Figure 2As shown, a plurality of linear grooves 41 are evenly distributed on the outer surface of the main drive wheel 4, and the linear grooves 41 are parallel to the central axis direction of the main drive wheel 4, so that a certain friction force is increased when the yarn 8 is wound on the main drive wheel 4, thereby avoiding the phenomenon of the yarn 8 slipping and stagnating, and ensuring the accuracy of transportation; a fixing hole 42 for installing a screw is provided in the linear groove 41, and the fixing hole 42 is centrally symmetrically arranged along the central axis of the main drive wheel 4, and the fixing hole 42 is used to fix the sleeve of the main drive wheel 4 on the rotating shaft. The centrally symmetrical arrangement of the fixing hole 42 helps to ensure that the sleeve and the rotating shaft have better coaxiality, so that the main drive wheel 4 has better rotation smoothness. On the other hand, the fixing hole 42 is in the linear groove 41, and through cooperation with the countersunk screw, the screw is prevented from being exposed and interfering with the transportation of the yarn 8. The edges where the linear groove 41 and the outer surface of the main drive wheel 4 meet are chamfered.

[0027] Preferably, a plurality of annular grooves 31 are arranged in parallel on the anti-winding wheel 3, which are used to separate the yarn 8 so that when the yarn 8 is wound on the main driving wheel 4, two adjacent yarns 8 in the axial direction always maintain a certain distance, which greatly reduces the phenomenon of the yarns 8 being entangled with each other. The bottom and top of the annular groove 31 are chamfered to prevent the yarn 8 from being scratched. The angle range of the bottom of the annular groove 31 is between 20-90°. If the angle is too large, the yarn 8 will slip out. The shallower the groove depth, the smaller the matching angle.

[0028] Preferably, the sensor module 500 includes at least one pressure sensor, such as Figure 3 In a preferred embodiment shown in FIG. 1 , two pressure sensors are included, namely, pressure sensor 1#510 and pressure sensor 2#520. The signal acquisition module 120 includes at least one signal collector, and the number of the signal collectors is consistent with the number of the pressure sensors. Figure 3 In a preferred embodiment shown in the figure, there are a signal collector 1#121 and a signal collector 2#122 matching the pressure sensor 1#510 and the pressure sensor 2#520; the number of pressure sensors and signal collectors is determined according to the length of the conveying stroke of the yarn 8. If the stroke is longer, the corresponding number can be increased to ensure that the tension of the yarn 8 at the output position remains stable.

[0029] Preferably, the main driving wheel 4 and the anti-winding wheel 3 are both made of wear-resistant plastic material.

[0030] Preferably, the motor 7 is a Hall brushless DC motor with an ultra-high speed of 4800 rpm in both reverse and forward directions. Combined with the integrated structure wire main drive wheel, the linear speed can stably run up to 950 m / min, and instantaneous fast and stable start and stop control can be achieved.

[0031] like Figure 4 As shown, a preferred embodiment of the PLC control system of the present invention includes a CPU operation processor 110, a signal acquisition module 120, a temperature sensor 130, a signal output module 160, a function key 140, an OLED display screen 150, a switching power supply 600, a program write entry 700 and a multi-axis synchronous communication 800 and other structures, and the CPU operation processor 110 is a STMF32F40VET6 processor.

[0032] The present invention relates to a control device for automatically detecting elastic wires (such as spandex wires) during high-speed transportation and automatically and quickly completing the adjustment of tension balance. The device is suitable for the use of elastic wires in disposable sanitary products and also suitable for the use and control of elastic wires in high-speed textile machinery. In the actual implementation process, the function key 140 is used for adjustment, the constant tension value required for a single elastic wire in the production process is set, and the positive and negative deviation values ​​of the tension change (such as 20.0±0.5 grams) are adjusted. The data is directly displayed on the OLED display screen 150. The tension change of the elastic wire during the transportation process is detected by a pressure sensor. The actual tension change value is provided to the CPU operation processor 100 for high-speed calculation via the signal acquisition module 120. The calculation result is directly sent to the motor drive module 200, and the motor drive module 200 controls the motor 7, so as to achieve instant adjustment and control of the elastic wire to perform constant control at the tension value required to be set, thereby ensuring that the elastic wire achieves uninterrupted and permanent tension control quality during the high-speed transportation process.

[0033] The yarn 8 (elastic wire) first passes through the ceramic clamp 2, which can pre-process the tension of the yarn 8 and play a role in positioning and guiding. The yarn 8 then winds around the main driving wheel 4 and the anti-winding wheel 3, and enters the pressure sensing component 5 after winding several circles. It successively bypasses the wire wheel 52, the hook 51, and the wire wheel 52 before being sent out. The three make the yarn 8 form a W-shaped structure and maintain a relatively tight state. The pressure change of the yarn 8 during the transportation process will drive the hook 51 up and down. At this time, the pressure sensing module 500 obtains the corresponding signal, and the equipment is adjusted accordingly through the PLC control system to achieve tension balance.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An independent constant tension elastic wire control device, comprising a motor, characterized in that: A base is also provided, the motor is fixed on the inner side of the base, a main driving wheel connected to the motor is provided on the outer side of the base, a rotatable anti-winding wheel is provided on one side of the main driving wheel, a ceramic wire clamp is provided on one side of the anti-winding wheel, the ceramic wire clamp is fixedly connected to the base through a first bracket, a pressure sensing component in contact with the yarn is provided on the side of the main driving wheel away from the anti-winding wheel, the pressure sensing component is fixedly connected to the base through a second bracket, a rib is also provided on the second bracket, which can strengthen the structural strength of the second bracket and maintain the stability of the pressure sensing component, a hook is provided in the middle of the pressure sensing component, a pressure sensing element is connected to the upper end of the hook, wire wheels are provided on both sides of the hook, the wire wheels are symmetrically arranged and located on both sides below the hook, the conveying path of the yarn passes through the two wire wheels and the hook to form a W-shaped structure, the yarn is hooked on the hook, and the pressure change of the yarn during the conveying process will cause the hook to move up and down, so as to obtain the signal change of the pressure sensing element connected to the hook; A circuit board is also provided in the base, and a PLC control system is provided on the circuit board. The PLC control system includes a CPU operation processor, a temperature sensor, a signal acquisition module, a signal output module, a sensor module and a motor drive module. The pressure sensing component is connected to the sensor module, and the motor is connected to the motor drive module. The signal acquisition module can receive real-time signals from the sensor module and transmit them to the CPU operation processor. The CPU operation processor generates an instruction signal after signal processing and transmits it to the motor drive module through the signal output module. The motor drive module controls the motor to drive the rotation of the main drive wheel, thereby driving the conveying of the yarn to form a complete cycle process. The temperature sensor is used to detect the operating temperature of the PLC control system. A plurality of linear grooves are evenly distributed on the outer surface of the main driving wheel, the linear grooves are parallel to the central axis of the main driving wheel, fixing holes for installing screws are arranged in the linear grooves, the fixing holes are centrally symmetrically arranged along the central axis of the main driving wheel, and the edges where the linear grooves meet the outer surface of the main driving wheel are chamfered; The anti-winding wheel is provided with a plurality of annular grooves in parallel, and the bottom and the top of the annular grooves are both chamfered.

2. An independent constant tension elastic wire control device according to claim 1, characterized in that: The PLC control system is also provided with function buttons and an OLED display screen. The function buttons are arranged below the main drive wheel for setting equipment operation parameters, and the OLED display screen is arranged on one side of the main drive wheel for displaying data.

3. An independent constant tension elastic wire control device according to claim 2, characterized in that: The sensor module includes at least one pressure sensor, and the signal acquisition module includes at least one signal collector. The number of the signal collectors is consistent with the number of the pressure sensors.

4. The independent constant tension elastic wire control device according to claim 1, characterized in that: The main driving wheel and the anti-winding wheel are both made of wear-resistant plastic material.

5. The independent constant tension elastic wire control device according to claim 1, characterized in that: The CPU operation processor is a STMF32F40VET6 processor.

6. The independent constant tension elastic wire control device according to claim 1, characterized in that: The motor is a Hall brushless DC motor.

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