Production process method for improving length dispersion of wool tops

Abstract

The invention discloses a production process method for improving length dispersion of wool tops, which relates to the technical field of wool treatment, and comprises the following steps: step 1, processing raw wool, washing, carding, gilling and combing to prepare wool tops with certain weight and length; step 2, dividing the manufactured wool tops into three equal parts according to the weight, feeding the first part of wool tops into a modified gilling machine, carrying out 12-time large drafting on a leather roller, and carrying out continuous snapping, so as to obtain drafting continuous pull-apart wool tops; 3, the second part of wool tops are fed into the improved gilling machine, interval type pause is achieved at the set time, roller feeding, stopping and drafting of the gilling machine are synchronous, overrunning pause is achieved, the rotating speed of the rollers is increased, variable motion is conducted, and interval type snapping wool tops are obtained; and 4, feeding the third part of wool tops, the drafting continuous pull-apart wool tops and the gap pull-apart wool tops into a gilling machine respectively, and mixing to obtain finished wool tops.

Description

Technical Field

[0001] The present invention relates to the technical field of wool processing, and specifically to a production process method for improving the length discreteness of wool top. Background Art

[0002] Wool length discreteness refers to the existence of certain differences or variation ranges in the fiber lengths within a wool top. This discreteness can be caused by various factors, including different breeds of wool sources, feeding conditions, age, shearing seasons, as well as operations and process parameters during subsequent processing.

[0003] In wool textile processing, the length discreteness of wool top has a certain impact on the quality and performance of the final product. Appropriate length discreteness may help enhance the softness, warmth retention, and breathability of wool fabrics. The diameter of wool fibers is a major aspect determining their value, and it is very closely related to their economic traits, having an important impact on wool production, processing, and trade, and determining 75% of the value of wool top. Moreover, the fineness variation of wool fibers accounts for 61% of the total profit of wool, directly affecting the quality of wool yarn and fabrics.

[0004] To improve the length discreteness of wool top, manufacturers can take a series of measures. First, in the selection of wool raw materials, wool from the same breed, feeding conditions, and shearing season can be preferably selected to reduce the length differences caused by the raw materials themselves. Second, during the wool processing, the process parameters of processes such as carding and spinning can be optimized to make the length distribution of wool fibers more uniform. In addition, advanced spinning technologies and equipment can also be adopted, such as using a fine spinning machine for precision spinning to improve the fineness and uniformity of wool top.

[0005] Although the existing methods for improving the length discreteness of wool top can achieve the differentiation of wool lengths to a certain extent, there are still some disadvantages, such as the risk of wool damage: excessive drawing or breaking operations may cause damage to wool fibers, affecting their quality and performance. This damage may be manifested as fiber breakage, wool scale shedding, or fiber twisting, thereby reducing the softness, warmth retention, and durability of wool top; low production efficiency: the existing methods often require multiple operations or complex process flows to achieve the discretization of wool lengths, which may lead to low production efficiency and increased production costs. Summary of the Invention

[0006] (1) Technical Problems to be Solved

[0007] In view of the deficiencies of the prior art, the present invention provides a production process method for improving the length discreteness of wool tops. After dividing the wool tops into three equal parts, the first part of the wool tops is drawn to obtain a continuously drawn and broken wool top; by modifying the drawing device, intermittent pauses are achieved at set times, so that the wool fibers of the second part of the wool tops are intermittently broken under the action of external forces to form wool tops with irregular lengths, obtaining intermittently drawn and broken wool tops; the third part of the wool tops and the continuously drawn and broken wool tops and the intermittently drawn and broken wool tops are respectively fed into a gilling machine for mixing to obtain finished wool tops, so as to solve the problem that excessive drawing or breaking operations may cause damage to wool fibers and affect their quality and performance.

[0008] (II) Technical solution

[0009] To achieve the above object, the present invention provides the following technical solution: A production process method for improving the length discreteness of wool tops, including the following steps:

[0010] Step S001. Process the original wool through washing, carding, gilling, and combing processes to make wool tops of a certain weight and length;

[0011] Step S002. Divide the made wool tops into three equal parts by weight, denoted as the first part of the wool tops, the second part of the wool tops, and the third part of the wool tops respectively. Feed the first part of the wool tops into the modified gilling machine, perform a 12-fold apron draft, and continuously break to form wool tops with large length differences, obtaining continuously drawn and broken wool tops;

[0012] Step S003. Feed the second part of the wool tops into the modified gilling machine, modify the drawing device to achieve intermittent pauses at set times, the set time range is 10 seconds to 40 seconds, the feed roller of the gilling machine stops, and the drafting rollers are synchronized to achieve overtaking pauses, increase the roller speed, and perform variable speed movement, so that the wool tops suddenly accelerate forward, and part of the wool fibers are intermittently broken under the action of external forces to form wool tops with irregular lengths, obtaining intermittently drawn and broken wool tops;

[0013] Step S004. Feed the third part of the wool tops and the continuously drawn and broken wool tops and the intermittently drawn and broken wool tops into the gilling machine respectively for mixing to obtain finished wool tops.

[0014] Preferably, the raw wool is processed through processes of wool washing, carding, gilling, and combing to produce a wool sliver of a certain weight and length. The wool washing process is used to remove dust, impurities, grass scraps, and oil contaminants in the wool, restoring the cleanliness of the wool and laying a good foundation for the subsequent carding process. The raw wool is put into a wool washing machine, an appropriate amount of detergent and water are added, and through mechanical stirring and rinsing, the wool is fully contacted with water and the stains are removed. Subsequently, the excess water is removed by centrifugation or pressing to obtain the washed wool, completing the wool washing process. The carding process is used to further loosen the washed wool, remove the grass scraps and residual impurities therein, and make the wool fibers basically straight and parallel, arranged in a net shape. A carding machine is used to card the washed wool. The needle bar of the carding machine will card the wool fibers and remove the impurities therein. The carded wool will form a net structure to prepare for the subsequent processes. The gilling process makes the wool fibers more straight and parallel and further improves the orientation and regularity of the fibers. The carded wool is fed into a gilling machine to card the wool to make its fibers more regular. The combing process is used to further remove short fibers and impurities, improve the length and regularity of the wool fibers, and prepare for making the wool sliver. The gilled wool is fed into a combing machine, and the combing machine uses a denser needle bar to finely card the wool and remove the short fibers and residual impurities therein. After combing, the length and regularity of the wool fibers will be significantly improved.

[0015] Preferably, the gilling machine includes a drafting unit and a feeding unit. The main function of the feeding unit is to feed the first wool sliver into the gilling machine. The drafting unit drafts and combs the sliver to make it reach the expected fineness and length. The drafting unit includes a front nipper holding point and a rear nipper holding point. There is relative movement between the two holding points. The linear velocity of the output end is greater than that of the feeding end. The holding points have a certain holding force. The wool fibers held by the nippers are straightened at the tail and the sliver is drawn out and thinned due to the resistance of the steel needles of the needle plate. Both the drafting unit and the feeding unit are provided with a wrap detection device to monitor the wrap amount through the wrap detection device. When the wrap amount exceeds the threshold, a stop instruction for the gilling machine is issued.

[0016] Preferably, in step S002, the top roller is an antistatic rubber pressure roller. The pressure range of the drafting roller is 150 - 300 kg, and the pressure of the feeding roller is based on the ratio of 3 / 4 to that of the drafting roller.

[0017] Preferably, in step S002, the modification method of the gill box is as follows: adjust the feeding speed and angle to reduce clogging and broken sliver phenomena, adjust the carding components such as the density and shape of the needle bars to better meet the requirements of the wool sliver; select aprons with high friction coefficient and elasticity, such as antistatic rubber pressure aprons, precisely control the speed and tension relationship between the aprons and the feeding system, and set the draft multiple to 12 times; design or modify the breaking mechanism to control the length of the wool sliver after breaking by adjusting the rotational speed and cutting force.

[0018] Preferably, the coefficient of variation CV is used to evaluate the length dispersion degree of the wool sliver, and the average length of the wool fibers in the drafting continuous break wool sliver is obtained. And the standard deviation σ, through the formula Calculate the coefficient of variation CV of the drafting continuous break wool sliver, where the average length Refers to the sum of the detected wool fiber lengths divided by the number of detected wool fibers. Suppose there are n wool fibers, i represents the number of the wool fiber, and the length of the i-th wool fiber is di. The average length is calculated through the formula Calculate the average length Through the formula Calculate the standard deviation σ of the wool sliver.

[0019] Preferably, in step S003, a programmable logic controller PLC is adopted. By programming, it can control the jamming operation of the drafting device at set time intervals, such as 10 seconds to 40 seconds; install sensors at key parts of the drafting device to monitor the position, speed or pressure state of the roller and apron components; install actuators so that they can accurately execute the jamming operation when receiving instructions from the programmable logic controller PLC.

[0020] Preferably, in step S003, it includes wool sliver feeding, feeding roller stop, drafting roller synchronization, variable speed movement and intermittent jamming operation, including the following steps:

[0021] Wool sliver feeding: Feed the wool sliver evenly into the modified gill box.

[0022] Feeding roller stop: When the wool sliver enters the gill box, make the feeding roller stop rotating at the set time point through the programming controller.

[0023] Drafting roller synchronization: At the same time as the feeding roller stops, the drafting rollers also need to stop synchronously to ensure that the tension of the wool sliver between the rollers remains consistent.

[0024] Variable speed movement: Simulate variable speed movement within the set time range (10 seconds to 40 seconds) to make the roller speed increase rapidly in a short time.

[0025] Intermittent jerking: When the speed of the roller increases to a certain extent, the feeding roller is suddenly released and starts rotating again. At the same time, the drafting roller also continues to run at a relatively high speed. This sudden action will produce an intermittent jerking effect in the sliver. Due to the jerking action, some wool fibers will be intermittently broken under the action of external forces. This breaking process is irregular, so the length of the finally formed sliver will also be irregular.

[0026] Preferably, the overrunning jerking means: First, stop the feeding roller, and at this time, the wool fibers at the feeding end stop advancing. Subsequently, the drafting roller also stops, but due to a delay, the fibers in the drafting zone will still be subjected to a certain drafting force. When starting again, the drafting roller starts rotating first, and it "overruns" the position of the feeding roller, so that the fibers can be more evenly distributed in the drafting zone. The feeding roller then starts and continues to feed new fibers. In this way, the drafting process of the fibers can be more effectively controlled, and the uniformity and quality of the fibers can be improved.

[0027] Preferably, the coefficient of variation CV of the continuously drafted and broken sliver is 36%-45%; the coefficient of variation CV of the intermittently broken sliver is 32%-48%; the coefficient of variation CV of the finished sliver is 32%-41%.

[0028] Preferably, for real-time monitoring and control of the length of the sliver during the production process, the following methods can be considered:

[0029] Laser scanning measurement: Use a laser scanning instrument to measure the sliver in real time. Through the scanning instrument, the length data of the sliver can be quickly and accurately obtained, and the data is transmitted to the quality control center for analysis and processing.

[0030] Visual imaging technology: Use a high-resolution camera or imaging system to image the sliver in real time, and combine image processing algorithms to measure the length of the sliver. This method can achieve non-contact measurement and has high accuracy and real-time performance.

[0031] Sensor monitoring: Set length sensors on the production line to monitor the length of the sliver in real time, and transmit the monitoring data to the monitoring system for real-time feedback and control.

[0032] Data analysis and feedback control: Input the real-time collected length data of the sliver into the data analysis system of the quality control center. Through data analysis, monitor and analyze the length during the production process, and promptly discover abnormal situations and perform feedback control.

[0033] Automation control system: Integrating modern automation control systems, combining length monitoring with production equipment control, realizing automated monitoring and adjustment of the production process, promptly detecting and eliminating defective products, and ensuring the stability and consistency of product quality.

[0034] (III) Beneficial effects

[0035] The present invention provides a production process method for increasing the length discreteness of wool tops, having the following beneficial effects:

[0036] (1) In this production process method for increasing the length discreteness of wool tops, after dividing the wool tops into three equal parts, the first part of the wool tops is drawn to obtain continuously drawn and broken wool tops; by modifying the drawing device to achieve intermittent pauses at set times, the wool fibers of the second part of the wool tops are intermittently drawn and broken under the action of external forces to form wool tops with irregular lengths, obtaining intermittently drawn and broken wool tops; the third part of the wool tops is respectively fed into the gilling machine together with the continuously drawn and broken wool tops and the intermittently drawn and broken wool tops for mixing to obtain finished wool tops, so as to solve the problem that excessive drawing or breaking operations may cause damage to the wool fibers and affect their quality and performance.

[0037] (2) This production process method for increasing the length discreteness of wool tops realizes the discreteness of wool length through a simple process flow, which can improve production efficiency and reduce production costs. Specific embodiments

[0038] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0039] Embodiment 1

[0040] To achieve the above object, the embodiment of the present invention provides the following technical solution: A production process method for increasing the length discreteness of wool tops, including the following steps:

[0041] Step S001. Process the raw wool through scouring, carding, gilling, and combing processes to make wool tops of a certain weight and length;

[0042] Step S002. Divide the made wool tops into three equal parts according to weight, respectively denoted as the first part of the wool tops, the second part of the wool tops, and the third part of the wool tops. Feed the first part of the wool tops into the modified gilling machine, perform 12 - fold apron drafting, and perform continuous breaking to form wool tops with large length differences, obtaining continuously drawn and broken wool tops;

[0043] Step S003. Feed the second wool sliver into the modified gilling machine, modify the drafting device to achieve intermittent pausing within a set time range of 10 seconds. Synchronize the feed roller and the stop of the gilling machine with the drafting roller to achieve over-pausing, increase the roller speed, and perform variable-speed motion, causing the wool sliver to suddenly accelerate forward, so that some wool fibers are intermittently broken under the action of external force to form a wool sliver with irregular lengths, obtaining an intermittently drawn wool sliver.

[0044] Step S004. Feed the third wool sliver, the continuously drawn wool sliver by drafting, and the intermittently drawn wool sliver into the gilling machine respectively for mixing to obtain the finished wool sliver.

[0045] Furthermore, process the raw wool through the processes of scouring, carding, gilling, and combing to make wool slivers of a certain weight and length. The scouring process is used to remove dust, impurities, grass bits, and oil contaminants in the wool, restoring the cleanliness of the wool and laying a good foundation for the subsequent carding process. Put the raw wool into a scouring machine, add an appropriate amount of detergent and water, and through mechanical stirring and rinsing, make the wool fully contact with water and remove stains. Subsequently, remove the excess water by centrifugation or pressing to obtain the scoured wool, completing the scouring process. The carding process is used to further loosen the scoured wool, remove the grass bits and residual impurities therein, and make the wool fibers basically straight and parallel, arranged in a net shape. Use a carding machine to card the scoured wool. The needle bars of the carding machine will card the wool fibers and remove the impurities therein. The carded wool will form a net structure to prepare for the subsequent processes. The gilling process makes the wool fibers more straight and parallel, and further improves the orientation and regularity of the fibers. Feed the carded wool into the gilling machine to card the wool and make its fibers more regular. The combing process is used to further remove short fibers and impurities, improve the length and regularity of the wool fibers, and prepare for making wool slivers. Feed the wool after gilling into the combing machine. The combing machine will use a denser needle bar to finely card the wool and remove the short fibers and residual impurities therein. After combing, the length and regularity of the wool fibers will be significantly improved.

[0046] Furthermore, the gilling machine includes a drafting unit and a feeding unit. The main function of the feeding unit is to feed the first wool sliver into the gilling machine. The drafting unit drafts and combs the sliver to make it reach the expected fineness and length. The drafting unit includes a front nip holding point and a rear nip holding point. There is relative motion between the two holding points. The linear velocity of the output end is greater than that of the feeding end. The holding points have a certain holding force. The wool fibers held by the nippers are straightened at the tail due to the resistance of the needle bars of the needle plate, and the sliver is also drawn out and thinned. Both the drafting unit and the feeding unit are equipped with a hair winding detection device. The hair winding amount is monitored through the hair winding detection device, and when the hair winding amount exceeds the threshold, a stop instruction for the gilling machine is issued.

[0047] Further, in step S002, the modification method of the gilling machine is as follows: adjust the feeding speed and angle to reduce jamming and broken strip phenomena, adjust the carding components such as the density and shape of the needle bars to better meet the requirements of the wool sliver; select aprons with high friction coefficient and elasticity, such as antistatic rubber pressure aprons, precisely control the speed and tension relationship between the apron and the feeding system, and set the draft multiple to 12 times; design or modify the breaking mechanism to control the length of the wool sliver after breaking by adjusting the rotational speed and cutting force.

[0048] Further, use the coefficient of variation CV to evaluate the length dispersion degree of the wool sliver, and obtain the average length of the wool fibers in the drafting continuous breaking wool sliver. And the standard deviation σ, through the formula Calculate the coefficient of variation CV of the drafting continuous breaking wool sliver, where the average length Refers to the sum of the detected wool fiber lengths divided by the number of detected wool fibers. Suppose there are n wool fibers, i represents the number of the wool fiber, and the length of the i-th wool fiber is di. Through the formula Calculate the average length Through the formula Calculate the standard deviation σ of the wool sliver.

[0049] Embodiment 2

[0050] To achieve the above object, the embodiment of the present invention provides the following technical solution: a production process method for increasing the length dispersion of wool sliver, including the following steps:

[0051] Step S001. Process the original wool, and make a wool sliver with a certain weight and length through the processes of wool washing, carding, gilling, and combing.

[0052] Step S002. Divide the made wool sliver into three equal parts by weight, which are respectively recorded as the first wool sliver, the second wool sliver, and the third wool sliver. Feed the first wool sliver into the modified gilling machine, perform 12-fold apron drafting, and perform continuous breaking to form a wool sliver with large length differences, and obtain the drafting continuous breaking wool sliver.

[0053] Step S003. Feed the second wool sliver into the modified gilling machine, modify the drafting device to achieve intermittent jamming within a set time range of 40 seconds. The feed roller of the gilling machine stops, and the drafting roller synchronizes to achieve overrun jamming. Increase the roller speed and perform variable speed movement, so that the wool sliver suddenly accelerates forward, and part of the wool fibers are intermittently broken under the action of external force to form a wool sliver with irregular lengths, and obtain the intermittent breaking wool sliver.

[0054] Step S004. Feed the third wool sliver, the drawn continuous break wool sliver, and the intermittent break wool sliver into the gilling machine respectively for mixing to obtain the finished wool sliver.

[0055] Further, in step S002, the top roller is an antistatic rubber pressure roller, the pressure range of the drafting roller is 150 - 300 kg, and the pressure of the feed roller is based on the ratio 3 / 4 to the drafting roller.

[0056] Further, in step S003, a programmable logic controller (PLC) is used. By programming, it can control the jerky operation of the drafting device at set time intervals, such as 10 seconds to 40 seconds. Sensors are installed at key parts of the drafting device to monitor the position, speed, or pressure state of the roller and top roller components. An actuator is installed to accurately perform the jerky operation when receiving instructions from the programmable logic controller (PLC).

[0057] Further, step S003 includes wool sliver feeding, feed roller stop, drafting roller synchronization, variable speed movement, and intermittent jerky operation, including the following steps:

[0058] Wool sliver feeding: Feed the wool sliver evenly into the modified gilling machine.

[0059] Feed roller stop: When the wool sliver enters the gilling machine, the feed roller is stopped from rotating at a set time point through the programming controller.

[0060] Drafting roller synchronization: At the same time as the feed roller stops, the drafting roller also needs to stop synchronously to ensure that the tension of the wool sliver between the rollers remains consistent.

[0061] Variable speed movement: Simulate variable speed movement within a set time range (10 seconds - 40 seconds) to rapidly increase the roller speed within a short period.

[0062] Intermittent jerk: When the roller speed increases to a certain extent, suddenly release the feed roller to make it start rotating again. At the same time, the drafting roller also continues to run at a higher speed. This sudden action will produce an intermittent jerk effect in the wool sliver. Due to the jerk action, some wool fibers will be intermittently broken under the action of external forces. This breaking process is irregular, so the length of the finally formed wool sliver will also be irregular.

[0063] Furthermore, the so-called "overshooting and pausing" means: First, stop the feed roller, at which time the wool fibers at the feed end stop advancing; subsequently, the drafting roller also stops, but due to a delay, the fibers in the drafting zone will still be subjected to a certain drafting force; when starting again, the drafting roller starts rotating first, and it "overshoots" the position of the feed roller, so that the fibers can be more evenly distributed in the drafting zone; then the feed roller starts, and continues to feed new fibers; in this way, the drafting process of the fibers can be more effectively controlled, and the uniformity and quality of the fibers can be improved.

[0064] Furthermore, the coefficient of variation (CV) of the continuously drafted and broken wool sliver is 36% - 45%; the coefficient of variation (CV) of the intermittently broken wool sliver is 32% - 48%; the coefficient of variation (CV) of the finished wool sliver is 32% - 41%.

[0065] Furthermore, preferably, for the real-time monitoring and control of the length of the wool sliver during the production process, the following methods can be considered:

[0066] Laser scanning measurement: Use a laser scanning instrument to measure the wool sliver in real time. Through the scanning instrument, the length data of the wool sliver can be quickly and accurately obtained, and the data is transmitted to the quality control center for analysis and processing.

[0067] Visual imaging technology: Utilize a high-resolution camera or imaging system to take real-time images of the wool sliver, and combine image processing algorithms to measure the length of the wool sliver. This method can achieve non-contact measurement and has high precision and real-time performance.

[0068] Sensor monitoring: Set up length sensors on the production line to monitor the length of the wool sliver in real time, and transmit the monitoring data to the monitoring system for real-time feedback and control.

[0069] Data analysis and feedback control: Input the real-time collected length data of the wool sliver into the data analysis system of the quality control center. Through data analysis, monitor and analyze the length during the production process, promptly discover abnormal situations and conduct feedback control.

[0070] Automation control system: Combine a modern automation control system, integrate length monitoring with production equipment control, realize automated monitoring and adjustment of the production process, promptly discover and eliminate defective products, and ensure the stability and consistency of product quality.

[0071] In summary, for the production process method of improving the length discreteness of the wool top, after dividing the wool top into three equal parts, the first part of the wool top is drawn to obtain a continuously drawn and broken wool top; by modifying the drawing device, intermittent pauses are achieved at set times, so that the wool fibers of the second part of the wool top are intermittently broken under the action of external forces to form a wool top with irregular lengths, obtaining an intermittently drawn and broken wool top; the third part of the wool top and the continuously drawn and broken wool top and the intermittently drawn and broken wool top are respectively fed into the gilling machine for mixing to obtain the finished wool top, so as to solve the problem that the drawing or breaking operation of a certain degree may cause damage to the wool fibers and affect their quality and performance.

[0072] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it is understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A production process for increasing the discrete length of wool strips, characterized in that: The following steps are involved: Step S001. Processing the raw wool, through the steps of washing, combing, needle combing and combing, to make wool strips of a certain weight and length; Step S002. The prepared wool strips are divided into three equal parts according to weight, which are respectively recorded as the first wool strip, the second wool strip and the third wool strip. The first wool strip is fed into the modified gill combing machine, and the leather roller is drafted 12 times, and the wool strip is continuously broken to obtain the drafted continuous breaking wool strip; Step S003. Feed the second portion of wool strips into the modified gilling machine, modify the drafting device, realize intermittent beating at the set time, set the time range of 10 seconds to 40 seconds, feed the rollers of the gilling machine, stop, and stretch the rollers synchronously to achieve overtaking beating, speed up the roller speed, and perform speed change movement, so that the wool strips suddenly accelerate forward, so that part of the wool fibers are intermittently broken under the action of external force to form wool strips of irregular length, and intermittently broken wool strips are obtained; Step S004: feed the third portion of wool strips, the continuously stretched wool strips and the intermittently stretched wool strips into a gill combing machine respectively, mix them, and obtain finished wool strips.

2. A production process for improving the discrete length of wool strips according to claim 1, characterized in that: The raw wool is processed through washing, combing, needle combing and combing to make wool strips of a certain weight and length; the washing process is used to remove dust, impurities, grass debris and grease pollutants in the wool, making the wool clean again and laying a good foundation for the subsequent combing process; The raw wool is put into a wool washing machine, and a proper amount of detergent and water are added. The wool is fully contacted with water and the stains are removed by mechanical stirring and washing. Then, the excess water is removed by centrifugation or pressing to obtain the washed wool, and the wool washing process is completed; the combing process is used to further loosen the washed wool, remove grass clippings and residual impurities therein, and make the wool fibers basically straight and parallel and arranged in a mesh; the washed wool is combed by a combing machine, and the needle row of the combing machine will comb the wool fibers and remove the impurities therein. The combed wool will form a mesh structure to prepare for subsequent processes; the pin combing process makes the wool fibers straighter and parallel, and further improves the orientation and uniformity of the fibers; the combed wool is sent to a pin combing machine to comb the wool to make its fibers more uniform; the combing process is used to further remove short fibers and impurities, improve the length and uniformity of the wool fibers, and prepare for making wool strips; the pin combed wool is sent to a combing machine, and the combing machine will use a denser needle row to finely comb the wool to remove short fibers and residual impurities therein.

3. A production process for improving the discrete length of wool strips according to claim 1, characterized in that: The gill combing machine includes a drafting unit and a feeding unit. The main function of the feeding unit is to feed the first portion of wool strips into the gill combing machine. The drafting unit drafts and combs the wool strips to make them reach the expected fineness and length. The drafting unit includes a front jaw holding point and a rear jaw holding point. There is relative movement between the two holding points. The linear speed of the output end is greater than the linear speed of the feeding end. The holding point has a certain holding force. The wool fiber held by the jaws is straightened at the tail due to the resistance of the needle plate steel needles, and the wool strips are also drawn longer and thinner. The drafting unit and the feeding unit are both provided with a wool winding detection device, which monitors the wool winding amount. When the wool winding amount exceeds the threshold, a command to stop the gill combing machine is issued.

4. A production process for improving the discrete length of wool strips according to claim 1, characterized in that: In step S002, the leather roller is an antistatic rubber pressure roller, the pressure range of the drafting roller is 150-300 kg, and the pressure of the feeding roller is 3 / 4 of the ratio with the drafting roller.

5. The production process for improving the discrete length of wool strips according to claim 1, characterized in that: In step S002, the modification method of the needle combing machine is as follows: adjusting the feeding speed and angle to reduce blockage and breakage, adjusting the combing components, such as the density and shape of the needle row, to better meet the needs of the wool strips; selecting a leather roller with a high friction coefficient and elasticity, such as an antistatic rubber pressure roller, accurately controlling the speed and tension relationship between the leather roller and the feeding system, and setting the drafting multiple to 12 times; designing or modifying the breaking mechanism, and controlling the length of the wool strip after breaking by adjusting the rotation speed and cutting force.

6. A production process for improving the discrete length of wool strips according to claim 1, characterized in that: The dispersion coefficient CV is used to evaluate the dispersion degree of wool strip length and obtain the average length of wool fibers in the continuous drawing and breaking wool strip. and standard deviation σ, through the formula The discrete coefficient CV of the continuous drawn wool strip is calculated, where the average length It refers to the total length of the wool fibers tested divided by the number of wool fibers tested. Suppose there are n wool fibers, i represents the number of the wool fibers, and the length of the i-th wool fiber is di. The formula Calculate the average length By formula Calculate the standard deviation σ of the wool strips.

7. The production process for improving the discrete length of wool strips according to claim 1, characterized in that: In step S003, a programmable logic controller (PLC) is used to control the beating operation of the stretching device at set time intervals, such as 10 seconds to 40 seconds, by writing a program; sensors are installed at key positions of the stretching device to monitor the position, speed or pressure state of the roller and leather roller components; and actuators are installed so that the beating operation can be accurately performed when receiving instructions from the programmable logic controller (PLC).

8. The production process for improving the discrete length of wool strips according to claim 1, characterized in that: Step S003 includes wool strip feeding, feeding roller stopping, drafting roller synchronization, speed change movement and intermittent beating operation, including the following steps: Wool strip feeding: feed the wool strips evenly into the modified gill carding machine; Feeding roller stop: When the wool strips enter the gill carding machine, the feeding roller stops rotating at the set time point through the programming controller; Synchronization of drafting rollers: When the feeding roller stops, the drafting roller also needs to stop synchronously to ensure that the tension of the wool strip between the rollers remains consistent; Variable speed motion: within the set time range, simulate variable speed motion to increase the roller speed rapidly in a short time; Intermittent beating: When the roller speed increases to a certain level, the feed roller is suddenly released to make it start rotating again. At the same time, the drafting roller continues to run at a higher speed.

9. The production process for improving the discrete length of wool strips according to claim 1, characterized in that: The discrete coefficient CV of the continuous drawing breaking wool strip is between 36% and 45%; the discrete coefficient CV of the intermittent breaking wool strip is between 32% and 48%; and the discrete coefficient CV of the finished wool strip is between 32% and 41%.

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