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CN-121992536-A - Collaborative control method for sliver and nep impurities of carding machine

CN121992536ACN 121992536 ACN121992536 ACN 121992536ACN-121992536-A

Abstract

The invention discloses a collaborative control method for carding machine raw sliver and nep impurities, which realizes optimal control through three-stage linkage of source prevention, process collaboration and dynamic feedback. The first stage of implementing fine cotton picking in the cotton picking process, the cotton bundles weight is 20-30 mg/block, the impurity removing efficiency of the single-shaft cotton picking machine is 25-35%, the second stage of constructing a licker-in and cover plate grading impurity removing system in the cotton picking machine, the licker-in impurity removing efficiency is 50-60%, the cover plate impurity removing efficiency is 3-10%, the cylinder-cover plate gauge is gradually received from 0.25mm to 0.15mm, the relative humidity of a workshop is 55-60%, the matched card clothing is cooperatively combined, and the third stage of monitoring and feeding back to a central controller in real time through a quality sensor, and dynamically fine-adjusting technological parameters to form a closed loop. The invention makes the impurity content of the raw strips lower than 0.08%, the short velvet growth rate lower than 3%, the total amount of cotton impurities reduced by more than 20%, the yield increased by 2% -3%, and the adaptability of the high impurity content raw materials is obviously enhanced.

Inventors

  • SUN XIANHUI
  • LIU WENBO
  • ZHOU YI
  • Kurban Alem.
  • CAI XIAO

Assignees

  • 图木舒克市东湖兴纺织有限公司

Dates

Publication Date
20260508
Application Date
20260224

Claims (10)

  1. 1. A synergistic control method for sliver and nep impurities of carding machine comprises pretreatment of opening and picking process, main carding of carding machine and quality control, the method is characterized in that the control process is systematically divided into three gradient phases in cooperative linkage: The first stage is a source prevention and collaborative preparation stage, and is used for implementing refined cotton grabbing and flexible opening in the cotton opening and picking process, controlling the weight of cotton bundles within a preset range and realizing pre-impurity removal by adopting a free opening mode; The second stage is a process coordination and gradient control stage, a classified impurity removal system of a licker-in and a cover plate is built in the carding machine, the licker-in part mainly removes large impurities and short velvet, the cover plate part mainly removes small impurities and neps, the interval between a cylinder and the cover plate is gradually tightened from an inlet to an outlet, and the licker-in and cover plate are matched with the cooperation combination of card clothing and workshop humidity control; The third stage is dynamic feedback and accurate regulation stage, in which a quality sensor is set at the key position of carding machine, real-time monitoring data is fed back to central controller, and according to nep and impurity fluctuation dynamic fine-tuning process parameters the closed-loop control is formed.
  2. 2. The method according to claim 1, characterized in that the refined bale plucking in the first stage is achieved by increasing the bale plucker operating rate and adjusting the speed of the plucking rollers and the descending stroke, and the bale weight is controlled to be 20-30 mg/block.
  3. 3. The method according to claim 1, wherein in the first stage, a single axial flow opener is adopted for flexible opening, the rotation speed of a beater is 480r/min-520r/min, the dust rod gauge is gradually reduced from an inlet to an outlet, and the impurity removal efficiency is 25% -35%.
  4. 4. The method according to claim 1, wherein the licker-in part in the second stage adopts a double licker-in serial structure, the rotating speed of the front licker-in is 780-850r/min, the rotating speed of the rear licker-in is 880-950r/min, and the total impurity removal efficiency of the licker-in and the impurity content of the cotton rolls are 50% -60%.
  5. 5. The method according to claim 1 or 4, wherein the cover plate part in the second stage is used for effectively removing fine impurities and neps by improving the linear speed of the cover plate by 10% -30% relative to a standard process and matching a high-pressure airflow cleaning device to ensure that the impurity content of the cover plate is not lower than 45%.
  6. 6. The method of claim 1, wherein the cylinder and cover plate are spaced from each other by 0.25mm, 0.20mm, 0.18mm and 0.15mm in this order from the inlet to the outlet in the second stage.
  7. 7. The method according to claim 1, wherein the relative humidity of the carding plant in the second stage is controlled to be 55% -60%, and the card clothing cooperative combination comprises tin Lin Xuan and a high-tooth-density alloy card clothing, doffer and a moderate-tooth-density card clothing, and a cover plate and a reinforced holding card clothing.
  8. 8. The method of claim 1, wherein the quality sensor in the third stage comprises a cotton layer thickness sensor at the cotton feeding box and a yarn evenness sensor at the output of the raw yarn, and the monitoring data is subjected to fine adjustment of the process parameters by the PLC controller every 30-60 seconds.
  9. 9. The method according to claim 1 or 8, wherein the logic of the dynamic fine adjustment is that the cover plate speed is automatically adjusted down by 5% -8% when the cotton knots of the raw strips exceed a set value by 15%, and the gauge of the licker-in dust removing knife is automatically reduced by 0.1-0.15 mm when the impurity content exceeds a set value by 10%.
  10. 10. The method according to any one of claims 1 to 9, wherein when used for high impurity content raw cotton with a impurity content of 3.5% -4.5%, the impurity content of the processed raw cotton is stably lower than 0.08%, the short staple growth rate is lower than 3%, the total amount of cotton knot impurities is reduced by more than 20% compared with the traditional process, and the yield is improved by 2% -3%.

Description

Collaborative control method for sliver and nep impurities of carding machine Technical Field The invention relates to the technical field of textile machinery, in particular to a method for cooperatively controlling impurities in raw sliver and nep of a carding machine. Background Neps and impurities are core indexes for evaluating the quality of raw sliver and finished yarn, and directly determine the efficiency and product quality of the subsequent spinning process. The existing cotton carding process always has fundamental contradiction in controlling neps and impurities, namely, the carding strength and doffing are enhanced to reduce the impurity content, so that the excessive rubbing of fibers is easy to generate new neps, and the carding gauge is excessively enlarged to reduce neps, so that impurities are not cleaned. This phenomenon is particularly remarkable when machine-harvested cotton and low-grade cotton with impurity content higher than 3.5% are processed. The traditional method depends on a single procedure (such as adjustment only in a cotton carding link) or local parameter adjustment (such as simple improvement of the rotating speed of a licker-in), and lacks of research on global view angles from raw cotton to raw cotton and collaborative evolution rules of neps/impurities. The process parameter setting is also most of empirical static combinations, dynamic collaborative optimization cannot be carried out according to incoming material fluctuation and online quality change, so that the quality of the raw strip is unstable, the short velvet growth rate is often more than 5%, the impurity content fluctuation of the raw strip is between 0.12% and 0.18%, and the production requirement of high-end yarns is difficult to meet. Therefore, a process method capable of systematically coordinating opening and picking and carding, integrally combing and removing impurity elements and realizing cooperative optimal control of neps and impurities is urgently needed. Disclosure of Invention The invention aims to overcome the defects of the prior carding machine raw cotton knot impurity cooperative control method, and provides a novel carding machine raw cotton knot impurity cooperative control method, which aims to solve the technical problems that the cotton knot and the impurity are cooperatively and optimally controlled for high-impurity raw cotton with the impurity content higher than 3.5 percent, the raw cotton knot impurity content is stably controlled below 0.08 percent on the premise of ensuring the minimum fiber damage, the short staple growth rate is less than 3 percent, and the total amount of cotton knot impurities is reduced by more than 20 percent, so that the method is more practical and has industrial utilization value. The invention further aims to provide a sliver and nep impurity cooperative control method for the carding machine, which aims to solve the technical problem that fine cotton grabbing and flexible opening are realized in the cotton opening and picking process, and the impurity removal efficiency of the uniaxial flow cotton opener is 25% -35% by controlling the weight of cotton bundles to be 20-30 mg/block, so that fiber damage and nep generation are reduced from the source, and the sliver and nep impurity cooperative control method is more suitable for practical use. The invention further aims to provide a sliver nep impurity cooperative control method of the carding machine, which aims to solve the technical problem that a licker-in and cover plate grading impurity removal system is built in the carding machine, and the optimum balance of impurity removal efficiency and fiber protection is realized by matching with the progressive gauge of a cylinder-cover plate, the cooperative combination of card clothing and the control of 55% -60% of workshop humidity, so that the carding machine is more suitable for practical use. The invention also aims to provide a sliver and nep impurity cooperative control method of the carding machine, which aims to solve the technical problems that the sliver and nep impurity cooperative control method is introduced into on-line quality monitoring and intelligent feedback regulation and control, and realizes closed loop cooperative control crossing from experience regulation to data driving through data feedback and dynamic parameter fine adjustment every 30-60 seconds, so that the sliver and nep impurity cooperative control method is more practical. The aim and the technical problems of the invention are realized by adopting the following technical proposal. The invention provides a sliver and nep impurity cooperative control method of a carding machine, which comprises pretreatment of an opening and picking process, main carding of the carding machine and quality regulation and control, and is characterized in that the method systematically divides the control process into three gradient stages of cooperative linkage, wherein the first stage i