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CN-116971063-B - Method for operating a carding machine, carding machine and spinning preparation device

CN116971063BCN 116971063 BCN116971063 BCN 116971063BCN-116971063-B

Abstract

The invention relates to a method for operating a carding machine in a spinning preparation device, wherein a fibre bundle is loosened between a cylinder with clothing and a carding element to individual fibres, oriented and cleaned, the fibre layer produced is transferred from the cylinder to doffer and subsequently changed into fibre sliver, the carding machine has a carding machine control with an operating unit, which after input of raw material and output by an operator determines a reference tin Lin Zhuaisu. Characterized in that the operator initiates an optimization program which allows selection between the agglomeration-optimized and/or energy-optimized operating modes, whereby the carding machine control unit executes an automatic measuring sequence, a plurality of sensors detect the number of agglomerations in the fibre layer for respective predetermined durations while determining the drive power of the carding machine, data of the sensors and the determined drive power are transmitted to an upper control unit of the spinning preparation plant, which suggests to the operator operating modes under different quality classes by means of at least said data under mathematical algorithms.

Inventors

  • SONG YIFEI
  • Andreas Zebodeka
  • Jorgen March
  • Martin Dowen
  • GUIDO ENGELS

Assignees

  • 特吕茨施勒集团欧洲公司

Dates

Publication Date
20260505
Application Date
20230807
Priority Date
20221028

Claims (20)

  1. 1. Method for operating at least one carding machine in a spinning preparation device, wherein a fibre bundle is unwound between a rotating cylinder (4) with clothing and stationary and surrounding carding elements to individual fibres, oriented and cleaned, and wherein the fibre layers produced thereby are transferred from the cylinder (4) to a doffer (5) and subsequently changed into fibre strands, the carding machine having a carding machine control with an operating unit (18), wherein after input of raw material and output by an operator the carding machine control determines a reference cylinder Lin Zhuaisu (n R ), characterized in that the operator initiates an optimization program which allows selection by the operator between a agglomeration-optimized and/or energy-optimized operating mode, whereby the carding machine control carries out an automatic measuring sequence, wherein a plurality of sensors (30) detect the number of agglomerations in the fibre layers within respective predetermined durations (T) and simultaneously determine the drive power of the carding machine, wherein the data of the sensors (30) and the drive power determined thereby are transferred to a control unit of a spinning preparation plant, and the control of the quality preparation plant is not recommended to the operator at least in a lower level by means of the carding machine control algorithm.
  2. 2. The method of claim 1, wherein the different tin Lin Zhuaisu is above or below the reference tin Lin Zhuaisu (n R ).
  3. 3. The method of claim 2, wherein different tin Lin Zhuaisu are at the same tin Lin Zhuaisu pitch above and below the reference tin Lin Zhuaisu (n R ).
  4. 4. Method according to claim 1, characterized in that the duration (T) for the different cylinder speeds is the same.
  5. 5. A method according to claim 3, characterized in that the duration (T) for different cylinder speeds is the same.
  6. 6. The method according to claim 1, characterized in that the measurement for determining the agglomeration and the drive power is carried out a plurality of times at each tin Lin Zhuaisu, wherein the durations (T) of the individual measurements are added to give the total duration (T).
  7. 7. The method according to claim 5, characterized in that the measurement for determining the agglomeration and the drive power is carried out a plurality of times at each tin Lin Zhuaisu, wherein the durations (T) of the individual measurements are added to give the total duration (T).
  8. 8. Method according to claim 1, characterized in that the control device of the carding machine is configured for automatically setting the carding nip at different rotational speeds of the cylinder (5).
  9. 9. Method according to claim 7, characterized in that the control device of the carding machine is configured for automatically setting the carding nip at different rotational speeds of the cylinder (5).
  10. 10. Method according to claim 1, characterized in that the optimization procedure is started on the control device (43) of at least one carding machine (100) or spinning preparation device.
  11. 11. Method according to claim 9, characterized in that the optimization procedure is started on the control device (43) of at least one carding machine (100) or spinning preparation device.
  12. 12. Method according to claim 1, characterized in that the result of the optimization procedure is transferred by the control means (43) of the spinning preparation device to the operating unit (18) of the at least one carding machine (100) for manual selection and confirmation of the quality category by the operator.
  13. 13. Method according to claim 11, characterized in that the result of the optimization procedure is transferred by the control means (43) of the spinning preparation device to the operating unit (18) of the at least one carding machine (100) for manual selection and confirmation of the quality category by the operator.
  14. 14. Method according to claim 1, characterized in that after selection and confirmation of the quality category by the operator, the result of the optimization procedure is obtained by the control means (43) of the spinning preparation device, so that all carding machines (100) of the spinning preparation device are started in an automatic operating mode.
  15. 15. Method according to claim 11, characterized in that after selection and confirmation of the quality category by the operator, the result of the optimization procedure is obtained by the control means (43) of the spinning preparation device, so that all carding machines (100) of the spinning preparation device are started in an automatic operating mode.
  16. 16. Method according to claim 1, characterized in that the operator can directly choose, by means of the start-up of the optimization program, whether at least one carding machine is operated in a cluster-optimized or energy-optimized manner.
  17. 17. A carding machine with a feed side for fibre bundles, wherein the carding machine is configured to feed the fibre bundles to a rotating cylinder (4) by means of at least one licker-in (3 a, 3b, 3 c), wherein the fibre bundles are loosened between a stationary carding element and a surrounding cover strip (17) and the cylinder (4) into individual fibres, oriented and cleaned, and the fibre layers produced therein can be transferred from the cylinder (4) to a doffer (5), downstream of which there is arranged a device for converting the fibre layers into fibre strips, the carding machine having at least three sensors (3) configured to detect agglomerations of fibre layers or short fibre accumulations, characterized in that the carding machine has a carding machine control with an operating unit (18) by means of which an operator starts an optimization program with which the carding machine is operated in an agglomerating-optimized and/or energy-optimized operating mode after input of raw material and yield.
  18. 18. Carding machine according to claim 17, wherein said at least three sensors (30) detect the fibre layer on the doffer (5).
  19. 19. Carding machine according to one of claims 17 to 18, characterized in that the sensor (30) is arranged in the web guiding element (20).
  20. 20. A card as claimed in claim 17, characterized in that the card machine is configured to automatically set the card nip.

Description

Method for operating a carding machine, carding machine and spinning preparation device Technical Field The invention relates to a method for operating a carding machine, a carding machine and a spinning preparation device. Background The number of agglomerates in the sliver of the spinning preparation plant is a decisive quality criterion in the manufacture of the yarn. Agglomeration is understood to be the accumulation of knotted fibers produced during cotton harvesting, ginning processes and cotton mechanical processing. Here, there is a distinction between the agglomeration of the shell particles and the agglomeration of the fibers. The shell particle agglomeration occurs when a piece of seed coat is attached to the fiber. The knots result from the accumulation of short fibers which shrink into knots or densities in the draw frame or roving frame after the carding process. During the subsequent spinning process, the agglomeration causes uneven color distribution in the yarn, which is undesirable. In addition, the knotting of the fibers also results in a reduced quality yarn, where the various interference sites must be removed. Hereinafter, the concept of agglomeration is an overview of the agglomeration of the shell particles, the accumulation of short fibers and the knotting of the fibers. It is known from the prior art to change the settings of the carding machine in such a way that the number of agglomerations is minimized. However, these settings also vary depending on the raw materials, so that the operator must be quite experienced to achieve optimal results. EP 0409772A1 discloses a method for determining the number of agglomerations at the outlet of a carding machine, wherein the fibre stack is measured simultaneously. If the measured value deviates from the preset nominal value, an attempt is first made to improve the corresponding value by resetting the fine cotton cleaner. If this is unsuccessful, the mixing ratio needs to be changed, which needs to be done by handling the bale breaker and finally also influences the bale store. In this method, the number of clusters and the individual parameters of the fibre stack are measured and a new card setting is assigned to the number of clusters or the individual parameters of the fibre stack individually. By means of a specific carding machine setting, the number of agglomerations can be reduced on the one hand, or the fibre stack can be changed by means of another carding machine setting on the other hand. It may happen here that by changing the adjustment parameters, such as the setting of the carding machine (carding speed, carding gap), the number of knots is significantly reduced, but at the same time a significant negative change of the fibre stack takes place, and vice versa. Furthermore, in the known method it has been found that the improvement of the two individual measured parameters (i.e. the reduction of the number of lumps and the improvement of the fibre pile) cannot be achieved on the card itself, but rather the mixing ratio is changed. DE 19651893B4 specifies that the measured value of the number of agglomerates and the measured value of the fiber length or the fiber shortening are correlated with one another, so that, unlike the known methods, a reduction of the number of agglomerates as much as possible and at the same time as little fiber damage (fiber shortening) as possible is achieved. The measured values of the number of clusters and the length of the fibers are combined and used to regulate the intervention. This allows an optimization to be achieved in a particularly advantageous manner. The disadvantage is that part of the fibers must be manually removed from the carded sliver, which makes the process cumbersome. Before analyzing this part and changing the card settings, a large amount of fibrous material is produced, which may be of poor quality. Disclosure of Invention The object of the invention is to improve a method for operating a carding machine or a carding machine in such a way that an operator obtains, from the starting material, an optimal setting of the carding machine with which an operating method with minimal agglomeration and/or energy saving is possible. The term "agglomerate" here is a general term of the agglomeration of the shell particles, the accumulation of short fibers and the knotting of the fibers. The invention relates to a method for operating a carding machine, wherein a fibre bundle between a rotating cylinder with clothing and a stationary or surrounding carding element is loosened into individual fibres, oriented and cleaned. The fibre layer produced here is transferred from the cylinder to the doffer and subsequently becomes a fibre sliver. The invention includes the technical teaching that the raw material and the throughput are fed by an operator into a carding machine control with an operating unit, and that the carding machine control determines a reference tin Lin Zhuaisu. The operato