Rotary cover plate carding machine

Abstract

The invention relates to a method for operating a rotary flat carding machine (1) and a rotary flat carding machine (1). The rotary flat carding machine (1) has a controller (2) with an input module (3), a feeder (6) and a drum (8) equipped with a drum clothing (9). A carding gap width (21) is formed between the outer surface (10) of the roller clothing (9) and one of the flat clothing (15). The rotary flat carding machine (1) also has a carding gap width measuring device (33) and an actuator (31) for adjusting the carding gap width (21), and a driver (42) for controlling the rotational speed of the drum (8). An input module (3) measures a process temperature, detects a target process temperature and an associated maximum process temperature, and detects a control range and a maximum value of the carding gap width (21). The controller (2) controls the target process temperature by adjusting the carding gap width (21) and / or the rotational speed of the feed (6) and / or the drum (8).

Description

[0001] This invention relates to a method for operating a rotary carding machine and a rotary carding machine.

[0002] A rotary carding machine is used in spinning preparation systems. It contains different types of working elements for cleaning, sorting, opening, and carding the fibrous material to be processed. In this case, the types of fibers processed are the most numerous, including cotton fibers, synthetic fibers, or mixtures thereof. In a rotary carding machine, the rotary carding unit, together with the rollers, forms the main carding zone, and its function is to break up fiber bundles to form individual fibers, separate impurities and dust, remove very short fibers, break up knots, and parallelize the fibers. Viewed along the direction of roller rotation, the pre-carding zone is located before the rotary carding unit, and the post-carding zone is located after the rotary carding unit, which also has cleaning and carding elements. Fiber guiding elements are arranged on the outer surface of the rollers between the cleaning elements, or also arranged at the transition from one carding zone to the next. These fiber guiding elements are used to guide the fibers conveyed by the rollers. Therefore, the fibers are held on the rollers, and the air carrying the fibers is thus subject to limited exchange. As a result of the processing of the fibrous material, heat is generated due to fiber friction, which is reflected in the process temperature. In this case, the temperature on the circumference of the roller is usually highest at the point where the fiber material leaves the main carding zone, because the carding gap formed in the main carding zone usually narrows continuously from the inlet to the outlet, thus increasing the carding work and therefore increasing the heat generation.

[0003] The maximum permissible processing temperature depends particularly on the fiber material being processed. In this regard, the focus is on synthetic fibers, also known as man-made fibers (MMF) or chemical fibers. Synthetic fibers particularly include polyamides, polyesters, polyacrylic acid fibers, and elastic fibers. A crucial property of polymeric materials is the so-called glass transition temperature. It is one of the most important characteristic variables of a polymer and provides an indication of the dimensional stability of the plastic under thermal stress. The glass transition temperature is the temperature at which a fully or partially amorphous polymer transitions from a flexible state of high viscosity or rubbery elasticity to a brittle state of glassy or hard elasticity. Therefore, it is also called the softening temperature. Each plastic has a specific glass transition temperature, which can be used to characterize it. There is no precise definition for the softening temperature. It is generally below the melting temperature. The softening range can be identified as the range where even small external stresses will cause permanent deformation. In fiber processing, such as in rotary carding machines, the softening range must never be reached during fiber processing, as this negatively impacts the subsequent use of the fiber, such as during the coloring process.

[0004] However, conversely, high-quality carded slivers can only be achieved through proper carding. During processing, a trade-off must be struck between carding intensity and production capacity to maintain the process temperature within permissible limits. For this, the dominant temperature during the carding process must be known. Various methods for operating a rotary carding machine based on the dominant temperature within the rotary carding machine are known from the prior art. For example, DE 10 2005 038 401 A1 discloses controlling the carding gap width and thus the carding quality based on measurements of the temperature of the roller surface and the side plates of the holding roller and rotary carding unit. Furthermore, EP 3 431 642 A1 discloses controlling the carding gap width and thus the carding quality based on measurements of the temperature at the carding element. The carding gap width is controlled based on measured temperature and shape change models. In these known methods, the control of carding quality does not consider the process temperature, i.e., the dominant temperature in the fiber material. Production is adjusted based on the operator's experience and the desired carding quality, thereby achieving the process temperature within a range that does not damage the fiber material. As a precaution, a high level of safety is provided by setting a low production rate when the actual process temperature is unknown.

[0005] The purpose of this invention is to provide a method for operating a rotary carding machine and a rotary carding machine that enables operation on fiber materials to be processed, thereby achieving the highest possible productivity while maintaining the required product quality.

[0006] This objective is achieved by the features in the characterizing portion of the independent claim. To achieve this objective, a method for operating a rotary carding machine is proposed, wherein the rotary carding machine comprises: a controller having an input module and a feeder for supplying fiber material; a machine frame; and a roller having a carding cloth mounted in the machine frame and being rotatable about a longitudinal axis. With the aid of the carding cloth, the fiber material is taken from the feeder and held on the surface of the roller. Furthermore, the rotary carding machine has a rotary carding unit having a plurality of carding elements, each carding element having a carding cloth and held on at least one flexible bow-shaped member on both sides of the roller along the longitudinal axis. The rotation of the roller guides the fiber material through the carding elements of the rotary carding unit. A carding gap having a carding gap width is formed between the outer surface of the carding cloth and the plane of the carding cloth facing the carding cloth. The fiber material guided through this carding gap is cleaned by the carding cloth of the carding element, and the fibers are guided parallel to the surface.

[0007] A rotary carding machine has a carding gap width measuring device and an actuator for adjusting the carding gap width by adjusting a flexible bow-shaped member. Various devices for measuring the carding gap width are known in the prior art, wherein the measurement result of the contact between the carding gap cloth and the roller carding cloth is detected under various conditions, and then a predetermined carding gap width is set by the actuator system starting from this zero point of the carding gap width. The basis for setting the carding gap width is knowing when it is zero, i.e., when contact occurs with the relatively positioned components. In this way, existing adjustment devices can be easily calibrated, taking into account the structural characteristics of the various components such as the flexible bow-shaped member and the carding element. By accurately determining the contact, on the one hand, accurate maintenance of the carding gap can be achieved, and on the other hand, damage to the components can be avoided. In various embodiments, a contact measuring unit for determining the contact between the carding gap cloth and the roller carding cloth is known in the prior art. For example, DE 10 2006002 812 A1 discloses a device in which the roller and the carding plate are electrically insulated from each other. The roller and the carding plate are connected as contact elements to a circuit, in which a measuring element for determining the contact is present. Furthermore, DE 39 13 996 A1 discloses a sensor for measuring the distance between needle cloths, mentioning capacitive, inductive, and optical sensors. WO 2008 055 367A1 discloses a measurement performed via spark discharge. CH 695 351 A5 discloses a measurement of structurally conducted sound for detecting contact between roller needle cloths and cover plate needle cloths.

[0008] It is also known that the flexible bow must be designed to be radially adjustable to ensure that the combing gap is constant or variable as needed throughout the path of the flexible bow. Actuators of various designs are used; for example, EP 1201 797 discloses a device in which the flexible bow is supported on a rotatably mounted roller, wherein the roller is designed as a rotatable worm-shaped cam. By rotating the cam, the flexible bow is raised or lowered. Furthermore, EP 2 392 703 A1 discloses a device in which the flexible bow is held on an eccentrically mounted bolt. EP 3 124 657 A1 discloses a device in which the bearing of the flexible bow is held on a bearing bolt connected to an adjusting rod and having a helical surface. The adjusting rod causes rotation of the bearing bolt, which subsequently results in radial displacement of the flexible bow. The actuator can be pneumatically, electrically, or electropneumatically driven.

[0009] The rotary carding machine also has a driver to control the rotational speed of the rollers. The rotational speed of the rollers affects the carding intensity. At high roller speeds, a correspondingly high circumferential speed is generated on the surface of the carding cloth supporting the rollers. The fiber material is guided through the carding elements at this circumferential speed. The higher the fiber speed, the denser the carding process, with a correspondingly high heat generation at the carding points. The roller rotational speed is distributed based on the amount of fiber supplied by the feeder, according to the desired carding intensity.

[0010] According to the method of the invention, the process temperature is measured such that it corresponds to the dominant temperature in the fiber material within the carding gap. The corresponding process temperature measuring device must be arranged such that the measurement detects the dominant process temperature in the fiber material or in the air layer surrounding the fiber material. Preferably, the process temperature measuring device is centrally located along the longitudinal axis of the roller. Furthermore, process temperature measuring devices can be located at corresponding ends of the roller to improve the determination of the current process temperature. The process temperature can also be measured from inside the roller. Viewed along one direction of operation of the roller, it is advantageous to provide a process temperature measuring device with an optical measuring device or temperature sensor downstream of the rotary cover unit. A resistance thermometer in the implementation of the Pt100 sensor is particularly suitable as a temperature sensor. In terms of measurement technology, the basis is a platinum precision resistor, which changes its resistance according to temperature. The measuring resistor can be designed as a thin-film element or a wire resistor. Due to the platinum material, it is very long-term stable. The Pt100 measuring resistor has a nominal resistance of 100 ohms at a temperature of 0°C. The Pt100 resistance thermometer is based on a resistor whose resistance increases with increasing temperature. They provide accurate results over a wide measurement range and are also very stable over long periods. The measuring resistor is mounted as close as possible to the fiber material within the temperature sensor.

[0011] The input module also detects the target process temperature and the corresponding maximum process temperature. The maximum process temperature is determined by the inherent properties of the fiber material to be processed and is derived from the glass transition temperature of the material used for the fiber. For example, the glass transition temperature of polyester ranges from 68°C to 80°C, depending on the fiber manufacturing process. In this case, the maximum process temperature will be set a few degrees lower than the current glass transition temperature of the fiber to be processed. Therefore, the target process temperature must be set a few degrees lower than the maximum process temperature so that if the target process temperature is exceeded, the maximum process temperature will not be reached immediately due to control inertia. For example, if the glass transition temperature of the fiber material currently being processed is 75°C, the selected maximum process temperature is 72°C, and the target process temperature is 68°C, there is an upper control range of 7°C before the glass transition temperature is reached.

[0012] Additionally, the input module detects the control range and maximum value of the carding gap width. During carding, the cover card cloth engages with the fiber material conveyed by the rollers, thereby cleaning and parallelizing the fibers. The deeper the engagement of the cover card cloth, the denser the carding, and the higher the quality of the processed fiber material. Depending on the fiber material and the desired quality, the control range is selected, for example, as 0.2 mm, and the maximum value is set to 0.4 mm. Using these example values, the controller then adjusts the carding gap width between 0.2 mm and 0.4 mm, ensuring it does not exceed the maximum value (0.4 mm in this case) to maintain product quality.

[0013] The controller regulates the process temperature by adjusting the carding gap width and / or the feed and / or roller rotation speed. When using carding gap width control, the carding gap width is adjusted within a specified range. If the current process temperature is lower than the target process temperature, the carding gap width is reduced accordingly without deviating from the specified range. This is especially important during the start-up phase of the rotary carding machine, which requires a certain amount of time to reach the process temperature. If the current process temperature is higher than the target process temperature, the carding gap width is increased accordingly, which reduces the carding intensity and also lowers the process temperature due to the corresponding lower heat generation. Feed-based control is used to regulate the amount of fiber material supplied. If the current process temperature is lower than the target process temperature, the fiber material feed is increased, and therefore the amount of fiber material fed through the carding gap is increased. If the current process temperature is higher than the target process temperature, the fiber material feed is decreased. When controlling the roller rotation speed, increasing the roller rotation speed lowers the process temperature, and vice versa. This problem can also be solved using complementary combinations of different controls. With this operation of the rotary carding machine, maximum possible productivity can be achieved at a given product quality without exceeding the glass transition temperature.

[0014] Alternatively, instead of directly detecting the target process temperature and the corresponding maximum process temperature, the fiber material identifier is input into the input module. Based on the fiber material identifier, the controller can access the fiber material data corresponding to the identifier stored in the controller. The identifier can be in the form of, for example, numbers, names, or codes, and can be detected accordingly by the input module.

[0015] Alternatively, instead of directly detecting the control range and maximum value of the carding gap width, the quality specification of the processed fiber material is input into the input module. Based on the quality specification, the controller can access the data stored in the controller for the quality specification. The quality specification can be presented, for example, as a quality grade or as a code and detected accordingly by the input module.

[0016] In another improved version of this method, the quality specification is already included in the fiber material identifier, and if the fiber material identifier exists, it is not necessary to separately detect the quality specification. Therefore, the fiber material identifier includes the control range and maximum value of the carding gap width corresponding to the quality specification of the fiber material. Thus, it is unnecessary to separately detect the control range and maximum value of the carding gap width.

[0017] Advantageously, when both the maximum carding gap width and the maximum process temperature are reached simultaneously, the fiber material feed is reduced. If, although the carding gap width is set to its maximum value, the process temperature rises to the maximum process temperature, the fiber material feed is reduced, allowing the current process temperature to reach the target process temperature again. This avoids quality losses due to excessive productivity.

[0018] Advantageously, at least one of the following temperatures is measured and considered by the controller as a correction factor when adjusting the target process temperature: roller temperature, machine frame temperature, carding element temperature, and flexible bowing element temperature. The temperature of the devices surrounding the carding process (such as rollers, machine frame, flexible bowing element, or carding element) affects the process temperature by dissipating or adding heat to the carding process. The temperatures of the flexible bowing element, rollers, and machine frame also affect the carding gap width. Temperature is used to correct the control of the target process temperature in the controller by evaluating the control deviation between the target process temperature and the actual process temperature and correcting for the resulting required adjustment of the carding gap width or slowing or speeding up the control response.

[0019] Advantageously, the ambient temperature is measured and taken into account by the controller as a correction factor when controlling the target process temperature. The air temperature surrounding the combing process, such as the air temperature in the area around the rotary cover unit, affects the temperature generated during the combing process through a cooling effect.

[0020] Preferably, the temperature is measured separately on both sides of the rotary carding machine along the longitudinal axis. This allows for the detection of temperature distribution asymmetry, preventing the maximum process temperature from being exceeded throughout the entire operating range of the rotary carding machine. Temperature distribution asymmetry can be caused by the tilt of the carding gap along the longitudinal axis. The typically unilateral arrangement of the rotary carding machine's drives can also lead to an unbalanced temperature distribution. By arranging separate process temperature measuring devices on both sides of the drum, single points exceeding the glass transition temperature of the fiber material being processed are also avoided.

[0021] Preferably, if the maximum carding gap width is not reached, the fiber material feed is increased. If the maximum carding gap width is not reached, productivity can be increased without sacrificing quality by increasing the fiber material feed.

[0022] In an alternative embodiment of the method, the control range of the carding gap width includes a single value corresponding to the maximum value of the carding gap width, such that the target process temperature is controlled via the feed of the fiber material. When the feed is increased, the amount of fiber material fed to the rollers increases, which leads to an increase in carding intensity due to the greater fiber material load on the rollers, or an increase in the roller rotation speed, and thus an increase in the speed at which the fiber material is guided through the carding elements. With the increase in carding intensity, the process temperature also increases. This alternative method enables the use of a rotary carding machine with a simple actuator system for adjusting the carding gap width, which is not suitable for automatic adjustment of the carding gap width.

[0023] Furthermore, a rotary carding machine for processing fibrous materials is proposed, which has a controller with an input module. The rotary carding machine has a feeder for feeding the fibrous material, a machine frame, and rollers within the machine frame, the rollers being fitted with roller needle cloth and held rotatable about a longitudinal axis. Additionally, the rotary carding machine has a rotary carding unit comprising multiple carding elements, each carding element having a carding cloth and held on at least one flexible bow-shaped member on both sides of the roller along the longitudinal axis. A carding gap with a carding gap width is formed between the outer surface of the roller needle cloth and the plane of the carding cloth facing the roller needle cloth. The rotary carding machine has a carding gap width measuring device, an actuator for adjusting the carding gap width by adjusting the flexible bow-shaped member, and a drive for controlling the rotational speed of the roller. Furthermore, a process temperature measuring device is provided such that the process temperature corresponds to the dominant temperature in the fibrous material within the carding gap. The carding gap width measurement and process temperature measurement are performed as described above. The actuator for adjusting the carding gap width can be a manually operated or fully automated adjustment device. Furthermore, the rotary carding machine detects the target process temperature and the associated maximum process temperature via an input module, and also detects the control range and maximum value of the carding gap width via the same input module. The controller provides adjustment of the target process temperature by regulating the carding gap width and / or the feed and / or the rotation speed of the rollers. A rotary carding machine assembled in this manner offers the advantage of achieving high productivity while operating as close as possible to the maximum process temperature, without accepting any quality loss.

[0024] Advantageously, the input module is designed as a keyboard or a reader. The keyboard can be directly mounted into the controller of the rotary carding machine. As a reading device, a reader known from the prior art for recognizing machine-readable codes (such as QR codes or barcodes) can be provided. The reader can be wired to the controller or directly mounted to the front of the controller. Preferably, the input module is equipped with remote access. Remote access allows, for example, a smartphone or tablet to be used as the input module. An input module equipped with voice recognition is also conceivable. A central database can also be provided as an input module via remote access.

[0025] Advantageously, the controller assigns corresponding data for the target process temperature and the maximum process temperature to the fiber material identifier. It is also advantageous if the controller assigns corresponding data for the control range and maximum value of the comb gap width to the quality specification. By storing the corresponding data records in the controller, the input and detection of necessary data are simplified, and errors can be avoided.

[0026] Other advantages of the invention are described in the following exemplary embodiments. In the accompanying drawings:

[0027] Figure 1 A schematic diagram showing a side view of a rotary carding machine is provided.

[0028] Figure 2 It shows that according to Figure 1 A magnified view of the X region;

[0029] Figure 3 A schematic cross-sectional view of an embodiment of the rotary carding machine is shown;

[0030] Figure 4 A schematic cross-sectional view of another embodiment of the rotary carding machine is shown, and

[0031] Figure 5 A detailed view of another embodiment of the rotary carding machine is shown in schematic form.

[0032] Figure 1A side view of a schematic diagram of a rotary carding machine 1 according to the prior art is shown. The rotary carding machine 1 has a machine frame 22 and a controller 2. An input module 3 is provided in the controller 2. The fiber material 4 to be carded may consist of synthetic fibers or a mixture of synthetic and natural fibers, which is placed in a filling chute 5 in the form of coarsely cleaned and separated fiber bundles. The fiber material 4 is fed from the filling chute 5 to a feeder 6 and received by a shredder or licker-in roller 7 in the form of a fiber layer made of fiber bundles. The licker-in roller 7 may be formed by a single licker-in roller or multiple licker-in rollers. The fiber bundles are transferred from the licker-in roller 7 to a spool or roller 8. On the roller 8, the fiber bundles are broken down into individual fibers, parallelized, and cleaned. A roller needle cloth 9 is mounted on the outer circumference of the roller 8. The fiber material carried by the roller needle cloth 9 reaches the area of ​​the main carding zone along the operating direction 11 around the roller 8, which rotates about a longitudinal axis 12, and this area is formed by cooperating with a rotary cover unit 13 arranged above the roller 8. The rotary cover unit 13 is provided with a schematically shown circumferential carding element 14, which is equipped with a cover carding cloth 15. A carding gap 20 is formed between the roller carding cloth 9 and the cover carding cloth 15, through which the fibrous material passes. The individual carding elements 14 are connected to each other and assembled to form a continuous circulating chain 17. The chain 17 is continuously moved in the rotary cover unit 13 via a guide roller 18 along the working direction 19 by a driver (not shown). The working direction 19 of the carding elements 14 is generally opposite to the operating direction 11 of the roller 8. The carding elements 14 are guided along the roller 8 by a flexible bow-shaped member 29. The roller 8 is rotatably mounted on a longitudinal axis 12 via bearings (not shown) in the machine frame 22 of the rotary cover carding machine 1. The longitudinal axis 12 is connected to a driver of the rotary cover carding machine 1, which is not shown in detail.

[0033] Following the rotary cover unit 13, the carded fiber material reaches the area of ​​a rotatably mounted doffer 23, which transfers the fiber material removed from the roller 8 to a rotatably mounted doffer roller 24. The doffer roller 24 conveys the fiber material removed by the doffer 23 to a subsequent pair of pressure rollers 25 via a guide device (not shown in detail), which conveys the fiber material to a nonwoven funnel 26 via another guide device (not shown) (e.g., a transverse conveyor belt). The fiber material formed in the nonwoven funnel 26 is calcined in the form of a carded sliver 28 by a subsequent pair of calcining rollers 27 and transferred to a sliver storage area (not shown).

[0034] Figure 2 It is based on Figure 1An enlarged view of region X. Two combing elements 14 are arranged on chain 17, and their details are shown. Each combing element 14 is equipped with a cover pin cloth 15 on one side assigned to roller 8. The cover pin cloth 15 is formed by a plurality of wire hooks with tips, which form a plane 16. Roller 8, arranged opposite to the combing elements 14, is provided with roller cloth 9. The tips of roller cloth 9 form its outer surface 10. A combing gap 20 with a combing gap width 21 is formed between the plane 16 of the cover pin cloth 14 and the surface 10 of the roller cloth 9. During operation, roller 8 moves in the operating direction 11, and chain 17 moves in the working direction 19.

[0035] Figure 3 A schematic cross-sectional view of an embodiment of a rotary cap carding machine 1 having a roller 8 and a carding element 14 is shown. The roller 8 is driven by a driver 42 and has a roller needle cloth 9 disposed on its outer circumference, the tips of which form an outer surface 10. The roller 8 is mounted in a machine frame 22 along its longitudinal axis 12. The carding element 14 is equipped with a cap needle cloth 15 on the side facing the roller 8, the tips of which form a plane 16. A carding gap 20 with a carding gap width 21 is formed between the surface 10 and the plane 16. The carding element 14 is mounted on both sides of the roller 8 on a first flexible bow member 29 and a second flexible bow member 30, respectively, and is guided on both sides of the roller. An actuator 31 is disposed between the machine frame 22 and the flexible bow members 29 and 30 in each case, by means of which the distance between the plane 16 and the surface 10 can be adjusted. An example of a structural acoustic sensor 32 is shown on the longitudinal axis 12, which is connected to a carding gap width measuring device 33 containing an evaluation device. The process temperature measuring device 34 is shown in the area of ​​the combing gap 20.

[0036] Figure 4A schematic cross-sectional view of another embodiment of a rotary carding machine 1 having a roller 8 and a carding element 14 is shown. The roller 8 has a roller needle cloth 9 disposed on its outer circumference, the tips of which form an outer surface 10. The roller 8 is mounted in a machine frame 22 along its longitudinal axis 12. The carding element 14 is equipped with a cover plate needle cloth 15 on the side facing the roller 8, the tips of which form a plane 16. A carding gap 20 with a carding gap width 21 is formed between the surface 10 and the plane 16. The carding element 14 is mounted on and guided on both sides of the roller 8, respectively, on a first flexible bow member 29 and a second flexible bow member 30. An actuator 31 is provided between the machine frame 22 and the flexible bow members 29 and 30 in each case, by means of which the distance between the plane 16 and the surface 10 can be adjusted. In the illustration shown, the carding element 14 is shown to be tilted relative to the longitudinal axis 12. This misalignment may occur due to manufacturing tolerances or different temperature-related expansion of the individual components. To measure the carding gap width 21, a current sensor 36 is provided between the carding element 14 and the roller 8. The current sensor is connected to a carding gap width measuring device 33, which includes an evaluation device. The carding element 14 and the roller 8 are electrically insulated from each other via an insulating part 35, so that current can only be detected by the current sensor 36 and / or the evaluation device when the cover card cloth 15 and the roller card cloth 9 are in contact with each other. In the illustrated embodiment, as shown along the longitudinal axis 12, process temperature measuring devices 34 are provided on both sides of the roller 8.

[0037] Figure 5 A detailed view of another embodiment of the rotary carding machine 1 is shown schematically. The rotary carding machine 1 has a controller 2. An input module 3 is connected to the controller 2. Fiber material is fed to the licker-in roller 7 via a feeder 6 and transferred from the licker-in roller 7 to a roller 8 that is rotatable about a longitudinal axis 12. The roller 8 is driven by a driver 42 in the operating direction 11. A rotary carding unit 13 is arranged above the roller 8. The rotary carding unit 13 is provided with a rotary carding element 14, schematically shown. A carding gap 20 is formed between the outer surface 10 of the roller and the plane 16 of the carding element 14. The carding element 14 is guided along the roller 8 by a flexible bow 29. After the rotary carding unit 13, the carded fiber material reaches the area of ​​a rotatably mounted doffer 23, which receives the carded fiber material removed from the roller 8.

[0038] An actuator 31 is provided between the machine frame 22 and the flexible bow-shaped member 29 in each case, allowing adjustment of the distance between the plane 16 and the surface 10. A structural acoustic sensor 32 is shown on the longitudinal axis 12, connected to a carding gap width measuring device 33 containing an evaluation apparatus. The carding gap width measuring device 33 is connected to the controller 2. A process temperature measuring device 34 is shown in the area of ​​the carding gap 20, also connected to the controller 2. Furthermore, specifically, the feeder 6, the driver 42, and the actuator 31 are connected to the controller 2. Using the controller 2, the carding gap width 21 (see...) is... Figure 2 The rotation speed of the roller 8 can be controlled by the actuator 31, the rotation speed of the roller 8 can be controlled by the driver 42, and the amount of fiber material fed to the roller 8 can be controlled by the feeder 6.

[0039] In the illustrated embodiment, possible mounting locations are shown for measuring the roller temperature 37, the flexible bow element temperature 38, the machine frame temperature 39, the combing element temperature 40, and the ambient temperature 41. The connection between the measurements 37 to 41 and the controller 2 is not shown. Figure 5 As shown in the image.

[0040] This invention is not limited to the exemplary embodiments shown and described. Modifications and combinations of features within the scope of the claims are also possible, even though these features are shown and described in different exemplary embodiments.

[0041] List of reference numerals

[0042] 1 Rotary carding machine

[0043] 2 controllers

[0044] 3 Input Module

[0045] 4. Fiber Materials

[0046] 5 Filling groove

[0047] 6 feeders

[0048] 7-pinning roller

[0049] 8 rollers

[0050] 9-roller needle cloth

[0051] 10 roller needle cloth surface

[0052] 11. Running direction of the rollers

[0053] 12 longitudinal axes

[0054] 13-turn cover plate unit

[0055] 14 Combing Components

[0056] 15 cover plate needle cloth

[0057] 16 Cover plate needle cloth plane

[0058] 17 chains

[0059] 18 guide rollers

[0060] 19 Work Directions

[0061] 20 combing intervals

[0062] 21 Combing gap width

[0063] 22 machine frame

[0064] 23 Dolph

[0065] 24 doffer rollers

[0066] 25 pressure roller pairs

[0067] 26 Nonwoven Funnel

[0068] 27 pairs of calendering rollers

[0069] 28 Coarse comb strips

[0070] 29 First flexible bow-shaped component

[0071] 30 Second flexible bow-shaped component

[0072] 31 actuators

[0073] 32-structure conductive sound sensor

[0074] 33. Combing gap width measuring device

[0075] 34 Process Temperature Measurement Device

[0076] 35 Insulation Part

[0077] 36 Current Sensor

[0078] 37 drum temperature

[0079] 38 Flexible bow-shaped component temperature

[0080] 39 machine frame temperature

[0081] 40 Combing element temperature

[0082] 41 Ambient temperature

[0083] 42 Roller Drive

Claims

1. A method for operating a rotary carding machine (1), wherein the rotary carding machine (1) comprises: a controller (2) with an input module (3) and a feeding system (6) for supplying fiber material (4); a machine frame (22); a roller (8) fitted with roller needle cloth (9) and rotatably held in the machine frame (22) about a longitudinal axis (12); and a rotary carding unit (13) having a plurality of carding elements (14), wherein each carding element (14) has a carding cloth (15) and is held on each side of the roller (8) in the direction of the longitudinal axis (12) in at least one flexible bow-shaped member (29, 30), and wherein a combing gap (20) having a combing gap width (21) is formed between the outer surface (10) of the roller carding cloth (9) and the plane (16) of the cover plate carding cloth (15) facing the roller carding cloth (9), and the rotary cover plate carding machine (1) has a combing gap width measuring device (33) and an actuator (31) for adjusting the combing gap width (21) by adjusting the flexible bow-shaped member (29, 30) and a driver (42) for controlling the rotational speed of the roller (8), characterized in that The following are the steps: -Measure the process temperature, wherein the process temperature corresponds to the dominant temperature in the fiber material (4) in the carding gap (20); - The target process temperature and the corresponding maximum process temperature are detected by the input module (3); - The input module (3) detects the control range of the combing gap width (21) and the maximum value of the combing gap width (21); - The controller (2) adjusts the process temperature by adjusting the combing gap width (21) and / or the feed (6) and / or the rotation speed of the roller (8).

2. The method according to claim 1, characterized in that, The target process temperature and the associated maximum process temperature are detected by inputting the identifier of the fiber material (4) into the input module (3).

3. The method according to claim 1 or 2, characterized in that, The control range and the maximum value of the combing gap width (21) are detected by inputting quality specifications in the input module (3).

4. The method according to claim 1 or 2, characterized in that, The identifier of the fiber material (4) includes the control range of the carding gap width (21) and the maximum value of the carding gap width (21).

5. The method according to one or more of the preceding claims, characterized in that, When the maximum value of the carding gap width (21) and the maximum process temperature are reached, the feed (6) of the fiber material (4) is reduced.

6. The method according to one or more of the preceding claims, characterized in that, The controller (2) measures at least one of the following temperatures and takes them into account as a correction factor when adjusting the target process temperature: roller temperature (37), machine frame temperature (39), combing element temperature (40), and flexible bow element temperature (38).

7. The method according to one or more of the preceding claims, characterized in that, The ambient temperature (41) is measured and taken into account by the controller (2) as a correction factor when adjusting the target process temperature.

8. The method according to one or more of the preceding claims, characterized in that, The temperature is measured individually on each side of the rotary carding machine (1), as shown in the direction along the longitudinal axis (12).

9. The method according to one or more of the preceding claims, characterized in that, If the maximum value of the combing gap width (21) is not reached, the feed (6) of the fiber material (4) is increased.

10. The method according to one or more of the preceding claims, characterized in that, The control range includes a single value corresponding to the maximum value of the carding gap width (20), and the target process temperature is adjusted via the feed (6) of the fiber material (4).

11. A rotary carding machine (1) for processing fibrous materials (4), the rotary carding machine comprising: Controller (2); input module (3); feeding system (6) for feeding the fiber material (4); machine frame (22); roller (8) equipped with roller needle cloth (9) and rotatably held in the machine frame (22) about a longitudinal axis (12); and a rotary cover plate unit (13) including a plurality of carding elements (14), wherein each of the carding elements (14) includes a cover plate needle cloth (15) and is held on at least one flexible bow-shaped member (29, 30) on both sides of the roller (8) along the longitudinal axis (12), and wherein a carding gap (20) having a carding gap width (21) is formed between the outer surface (10) of the roller needle cloth (9) and the plane (16) of the cover plate needle cloth (15) facing the roller needle cloth (9), and the rotary cover plate carding machine has a carding gap width measuring device (33), and has a device for adjusting the flexible bow-shaped member (29, 30) by means of the carding gap width measuring device (33). 30) an actuator (31) for adjusting the carding gap width (21) and a driver (42) for controlling the rotational speed of the roller (8), characterized in that a process temperature measuring device (34) is provided, wherein the process temperature corresponds to the dominant temperature in the fiber material (4) in the carding gap (20), and the input module (3) detects the target process temperature and the associated maximum process temperature, and the input module (3) detects the control range and maximum value of the carding gap width (21), and the controller (2) adjusts the target process temperature by adjusting the carding gap width (21) and / or the feed (6) and / or the rotational speed of the roller (8).

12. The rotary carding machine (1) according to claim 11, characterized in that, The input module (3) is designed as a keyboard or a reading device.

13. The rotary carding machine (1) according to claim 11 or 12, characterized in that, The input module (3) is equipped with remote access.

14. The rotary carding machine (1) according to one or more of claims 11 to 13, characterized in that, In the controller (2), corresponding data for the target process temperature and the maximum process temperature are assigned to the identifier of the fiber material (4), and the detection of the target process temperature and the associated maximum process temperature is provided by inputting the identifier of the fiber material (4).

15. The rotary carding machine (1) according to one or more of claims 11 to 14, characterized in that, In the controller (2), corresponding data for the control range and maximum value of the combing gap width (21) are assigned to the quality specification, and the control range and maximum value of the combing gap width (21) are detected by the detection of the quality specification.

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