• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an analysis unit for analyzing the quality of a wound in a winding machine wadding (9), wherein the analysis unit (10) has two spaced driven rollers (18) for receiving and unwinding of the lap roll (9), wherein the unwound cotton by means of two further driven rollers (19) is removable. Furthermore, the invention relates to a winding machine for winding slivers. The invention is characterized in that the analysis unit (10) has at least two measuring systems for detecting the winding quality.
    公开号:CH708698B1
    申请号:CH01475/14
    申请日:2014-09-29
    公开日:2018-05-15
    发明作者:Friedrich Roland；Felder Martin；Nicole Saeger Dr；Berns Jochen
    申请人:Truetzschler Gmbh & Co Kg；
    IPC主号:
    专利说明:

    Description: [0001] The invention relates to an analysis unit for analyzing the quality of a cotton roll wound in a winding machine. Furthermore, the invention relates to a winding machine for winding fiber tapes, with a winding unit, on or in which a cotton roll is formed during operation.
    The current supply of flat combing machines is carried out by cotton rolls, which were previously generated in winding machines from individual tapes. For this purpose, the winding machine receives the template in tape form from at least one stretch, the template being temporarily stored in round or rectangular cans. The winding machine usually consists of a winding unit with at least two winding rollers, on which the cotton roll is formed by means of a sleeve. The winding unit is usually preceded by at least one pair of pressure rollers which deflect, compress and / or stretch the strips. An inlet area is arranged in front of the pressure rollers, in which a further compression unit or a smoother can be arranged.
    The quality of the winding produced is a decisive factor for the productivity of the following comber, as well as the quality of the comb that can be produced and the proportion of combed material required. A high level of uniformity, low hairiness and good unrolling characteristics characterize a good wrap, so that the comber runs with as little downtime as possible. In order to operate the winding machine with an optimal setting, the quality of the winding must be checked regularly. Various analyzes can be carried out for this purpose, but they are all arranged in separate devices. The analysis process is correspondingly complex since there is also no summary of all analysis data and these are not available together for setting or controlling the winding machine. Another disadvantage is that the cotton roll or the separated cotton has to be transported to different locations in the spinning mill for analysis, which is very time-consuming.
    It is an object of the invention to provide an analysis unit which is suitable for different types of quality measurement.
    Furthermore, it is an object of the invention to provide a winding machine with which high-quality wadding can be produced.
    The invention solves the problem set by the teaching of claim 1 and 10; further advantageous design features of the invention are characterized by the dependent claims.
    According to the technical teaching according to claim 1, the analysis unit for analyzing the quality of a lap wound in a winding machine comprises two spaced-apart driven rollers which receive and unwind the lap, with the unwound lap being removable by means of two further driven rollers.
    [0008] The invention is characterized in that the analysis unit has at least two measuring systems for recording the winding quality. The measuring systems can be integrated as modules in the analysis unit, so that each analysis unit can be equipped with different measuring systems depending on customer requirements.
    In contrast to the prior art, the analysis unit combines several measuring systems for which the same device elements can be used. It is no longer necessary to transport the cotton roll or the separated cotton to different locations in the spinning mill, which means that the quality check can be carried out more quickly. Another advantage is the easy handling of the very heavy wraps during testing. This is reduced by the automatic unwinding of the reels and the reduced manual effort during testing.
    In an advantageous embodiment, the analysis unit has a sensor with which the length of the unwound cotton can be determined directly or indirectly. Various measuring systems can be automated using this sensor in conjunction with the driven rollers.
    [0011] The analysis unit can have a manual tape tear-off device, with which a predetermined length of cotton can be removed from the cotton roll in order to carry out a weight measurement.
    [0012] Particularly preferably, the analysis unit can have a weighing system and / or a measuring system for the winding hardness and / or a loop unit for connection to a user measurement and / or a moisture measuring system and / or a hairiness measuring system and / or a force measuring system. The measuring systems can all be integrated together in the analysis unit, or optionally only a part of it, but at least two.
    In a further embodiment, the measured values of the measuring systems can be processed together in one evaluation unit. The evaluation unit can be a computer integrated in the analysis unit or an external computer. Due to the fact that the data from different measuring systems flow into the evaluation unit, a very comprehensive picture of the quality of the cotton wrap can be displayed, in which measurement inaccuracies or measurement errors are also noticeable and can be compensated for if necessary.
    The connection of the evaluation unit with the winding machine for setting the machine parameters guarantees an exact and rapid adaptation of the winding machine to, for example, different fiber qualities or in the event of deviations in production conditions such as air humidity or temperature. Furthermore, an automatic setting of the winding machine is possible without the operator having to use an input keyboard to save the data with a possi2
    CH 708 698 B1 enter the error rate manually. For this purpose, the analysis unit can be connected to the winding machine for transmitting the data by means of a data line.
    [0015] In a further embodiment, the analysis unit can have an upper and a lower unit, which can be separated from one another. The assembly personnel can visit different spinning mills with the analysis unit in order to reset the winding machines. The separation of the analysis unit enables easy transport in a car or as extended hand luggage on an airplane.
    Preferably, the tape tear-off device or the weighing system and / or a measuring system for the winding hardness and / or a loop unit for connection to a Uster measurement and / or a moisture measuring system and / or a hairiness measuring system and / or a force measuring system are arranged in the upper unit. The particularly sensitive part of the analysis unit can thus be transported separately packed. Furthermore, integration directly into a winding machine is possible, so that the evaluation data flow directly into the control of the winding machine and its machine parameters can be adjusted.
    [0017] A further advantageous embodiment provides that the lower unit has rollers, as a result of which the analysis unit can be moved. This creates a mobile analysis unit that can be sufficient for a complete spinning mill. The operating personnel can start up each winding machine, check the cotton rolls, evaluate them and, if necessary, change the machine parameters with the data.
    The winding machine according to the invention for winding fiber ribbons, with a winding unit in which a wadding roll is formed, is characterized in that the winding machine has a weighing system and / or a measuring system for the winding hardness and / or a loop unit for connection to a user measurement and / or has a moisture measuring system and / or a hairiness measuring system and / or a force measuring system in the winding machine. The measuring systems, which are designed as a module, can be integrated into the winding machine individually or in a combination. The measurement data can flow into the machine control via an evaluation unit, for example to set the tension between the winding rollers, the winding pressure, the winding speed, the warping between the printing rollers, the tension between the printing roller and the winding rollers or other parameters. The advantage lies in the fact that the measured values determined can be directly incorporated into the change in the winding quality without the winding having to be finished first, in order to then possibly destroy parts of it.
    Another preferred embodiment is that the weighing system and / or the measuring system for the winding hardness and / or the loop unit for connection to a Uster measurement and / or the moisture measuring system and / or the hairiness measuring system and / or the force measuring system in an upper unit Analysis unit are arranged, wherein the upper unit can be integrated into the outlet area of the winding machine. The advantage lies in the prepared interface between the upper unit of the analysis unit and the winding machine, so that once the winding machine has been adjusted, the upper unit can be transported to the next winding machine and used there for quality control.
    The invention is explained in more detail below using an exemplary embodiment.
    1 is a perspective view of an analysis unit;
    2 shows a side view of the analysis unit;
    3a + 3b show a detailed view of a manual tape stripper in the open and closed position;
    4 shows a schematic representation of a weighing system;
    5 shows a schematic representation of a measuring system for determining the winding hardness;
    6 shows a schematic illustration of the analysis unit with an Uster test;
    Fig. 7a + 7b is a schematic representation of the analysis unit with a hairiness test, and
    Fig. 8 is a schematic representation of a winding machine.
    The analysis unit 10 according to the invention can be used on the one hand for the optimization of the winding machine 1 (optimization of individual functional elements of the machine and for the optimal setting of the machine parameters). On the other hand, it can be used in spinning mills for process control of winding quality. Depending on the quality achieved, the process parameters during winding production can be adjusted.
    This can be optimized e.g. the winding quality and thus the quality of the end product or the process parameters such as the delivery speed.
    In this way, the economy of the overall process can be improved (higher delivery speeds, lower percentage of combers when combing, etc.).
    CH 708 698 B1 [0024] FIGS. 1 and 2 show an analysis unit 10 according to the invention, which can each consist of a separable lower and an upper unit 11, 12. The analysis unit 10 has rollers 13 on its underside so that it can easily be moved in a laboratory or a spinning mill by means of the handles 14. The upper and lower units 11, 12 can be separated by means of quick-release screws, adapters being provided for the electrical plug connections. The size of the separate upper and lower unit 11, 12 can be selected so that it can easily be loaded and transported by a person in a car, but can also be taken on board an airplane, for example, as extended hand luggage.
    The lower unit 11 essentially houses the control cabinet of the analysis unit 10 and a collecting container for cotton wool, which can be equipped with a scale.
    Within the upper unit 12, two rollers 18 are arranged in an upwardly open recess or trough, on which the cotton roll 9 rests. The rollers 18 are driven by a motor 17, which can preferably be designed as a servo motor. Instead of the rollers 18, the cotton roll 9 can also rest on a driven belt. For lateral limitation, spacers 15 are arranged, which guide the cotton roll 9 within the recess of the upper unit 12. So that the cotton roll 9 cannot roll off the rollers 18 and fall out of the analysis unit 10, a rod 22 can be arranged in front of and behind the cotton roll 9. A control panel 16 is arranged on the upper unit 12, with which the various analysis methods can be started. Furthermore, a sensor 21 is arranged in the analysis unit 10, with which the number of revolutions of the rollers 19 and thus the length of the wad can be determined. The cotton roll 9 is unwound via the rollers 18 at a freely selectable speed for analysis. The unwinding speed can correspond to the delivery speed of the comber. Alternatively, any other unwinding speed can of course also be set. The unwound cotton 9a can optionally be separated, analyzed and, for example, weighed by a tape stripper 20 after a certain test length. Alternatively, the unwound cotton 9a can be fed to an Uster unit without being separated.
    The motor 17 is preferably designed as a servo motor and drives the rollers 18 and 19 at the same time. A slight transmission ratio is installed between the rollers 18 and 19, so that the rollers 19 run slightly faster, for example 2% faster, in order to prevent the cotton wool from sagging or jamming between the rollers 18, 19. A gear transmission between the rollers 19 prevents asynchronous running, especially in the case of thick spots in the cotton 9a, which the rollers 19 can press apart. For this purpose, both rollers 19 are still spring-loaded, whereby a pretension acts on the cotton wool.
    A belt breaker 20 with the associated rollers 19 is described below with reference to FIGS. 3a and 3b. In this exemplary embodiment, the belt stripper 20 comprises two levers 23a and 23b, which are suitable for manual actuation of the sampling. The lever 23a cooperates with a sheet profile 24a, both of which can be pivoted about the pivot point 26. The lever 23b cooperates with a further sheet metal profile 24b, both of which can likewise be pivoted together about the pivot point 26. In Fig. 3a, the cotton 9a runs through the rollers 19, which have the function of a tear-off roller and thus form the first nip. The cotton 9a continues through the sheet profile 24b, which has a corresponding recess for this purpose. In order to tear off a predetermined length of cotton, the motor 17, which can implement a braking function as a servo motor, stops. The cotton 9a is clamped between the stationary rollers 19 (first clamping point). By actuating both levers 23a and 23b about the pivot point 26, the sheet metal profiles 24a, 24b also pivot about the pivot point 26. Because of the different lever arms, the cotton 9a is clamped between an edge 25 and a surface of the sheet profile 24a and taken along, whereby the second clamping point is formed becomes. The tensile force acting on the cotton 9a tears it off at the first nip between the rollers. Now the cotton 9a can be manually weighed after the levers 23a, 23b have been released. The tape stripper can be pivoted completely about the pivot point 26 down into the analysis unit 10 in order to make room for other measuring systems.
    As an alternative to the tape stripper 20 with a manual weighing of the cotton 9a, the analysis unit 10 can be equipped with a weighing system 30, as shown in FIG. 4. The fineness of the wadding, which determines the winding quality and thus the setting of the winding machine, can be determined via the weight determination together with the length of the batting 9a, which is determined by the sensor 21 through the number of revolutions of the rollers 19. For this purpose, the cotton weight is determined at two points in time. At these two points in time, the length of the unwound cotton 9a is measured and the cotton weight and thus the cotton fineness are determined from these two values. The structural design provides for the rollers 18 to be mounted in a frame 33 which is rotatably mounted about a pivot point 32. Spaced from the fulcrum 32, both sides of the frame 33 are connected by a rod 34 which rests on a sensor 31 for determining the weight. As described with reference to FIGS. 1 and 2, the rollers 18 are driven by the motor, for example, via a belt drive, not shown. With the drive, a weight or force component also acts on the weighing system, but this can be neglected, since the weight difference is determined over time. On the basis of the revolutions of the rollers 19, the sensor 21 determines the length of the cotton 9a developed during this time, whereby the cotton weight is calculated. The advantage of this weighing system 30 lies in the fact that the weighing process can be automated, with which continuous data acquisition and logging of the production quality can take place at the same time. Another decisive advantage is the non-destructive test, which can be carried out in parallel with an Uster test. The determined fineness of wadding can be evaluated differently, e.g. the course of fineness over the winding length or the deviation of the fineness from the nominal value or mean fineness.
    CH 708 698 B1 The determination of the winding hardness can be determined using a measuring system according to FIG. 5, in which the flexing behavior of the winding 9 is used. The winding hardness is understood here to mean the spring-up behavior or the dimensional stability of the winding over the winding diameter, that is to say the flexing behavior or the compression in the direction of the winding core due to its own weight, whereby the fibers can be pushed outwards, if necessary. An indentation of the winding 9 on a support, here the two rollers 18, is referred to as flexing. The wool is compressed in the direction of the winding core by pressing, but at the same time is also pushed outwards. The flexing is a measure of the winding hardness averaged over the winding width with respect to the current winding weight. If this hardness is too low, this is disadvantageous for the winding quality because the winding does not run optimally (poor unwinding behavior) and the resulting actual diameter of the winding becomes very large. The flexing is quantified by the "opening", that is the percentage change in diameter after the contact point (ratio of the actual diameter of the reel to the contact diameter of the reel). There is an optimal hardness of the wrap when almost no flexing takes place. The actual diameter and the contact diameter are approximately the same, which means that the opening jumps to zero.
    By parallel detection of the length of the unwound cotton 9a, the winding length can be determined at which the flexing occurs. Furthermore e.g. the actual diameter at which no more milling occurs can be recorded.
    On the measuring system winding hardness 40, a bracket 41 is rotatably attached to one of the rollers 18. The bracket is e.g. via a linear guide 42, designed in such a way that its length is variable in accordance with the change in radius due to the roll 9 lying on it. The adjustment of the length of the holder 41 is achieved via a receptacle 43 which is pushed into the winding tube 9b and is fixed there without play (e.g. via spring elements on the circumference of the receptacle).
    Sensors 44 and 45 for contactless distance measurement (e.g. by means of a laser) are attached to both ends of the holder 41. The sensor 44 measures the distance to the reflector 46 fastened on the linearly movable part of the holder 41. The reflector 46 is ideally fastened on the movable part of the holder 41 such that the distance C between sensor 44 and reflector 46 is equal to the distance between the sensor 44 and winding tube 9b. The sensor 45 measures the distance to the winding surface. With sensors 44, 45, the current radius (and thus the current diameter = "actual diameter"), as well as the radius at the contact point (and the theoretical diameter at this point = "contact diameter") and then the "opening" can be determined become.
    Here it is:
    • A: The distance from sensor 44 to the pressed-in contact area (known, because it is always the same) • B: The radius in the pressed-in contact area (half contact diameter without sleeve 9b, sought) • C: The distance from sensor 44 to reflector 46 = distance from Sensor 44 to winding tube 9b • X: The distance from sensor 45 to the winding surface (measured) • Y: The radius of the winding 9 (half the actual radius without tube, sought) • Z: Distance from sensor 45 to tube 9b, known, since always the same, the sizes B and Y searched are calculated as follows:
    • B = C-A • Y = Z-X Furthermore:
    • D B = 2 x B + sleeve diameter = support diameter • D Y = 2 x Y + sleeve diameter = actual diameter The required opening is calculated as follows:
    Dy - Dg
    Cracking = ---- * 100% θΒ The dimensional stability can also be determined visually by e.g. the operating personnel determines the point in time at which walking no longer occurs. For this purpose, the associated winding length or the associated winding diameter is determined at the same time.
    CH 708 698 B1 As a further measuring system, the analysis unit 10 can be combined with an Uster test, which is often available in the spinning mills as a separate measuring system and only has to be combined with this. For this purpose, the analysis unit 10 provides a loop unit 50 which is attached to the analysis unit 10. 6 schematically shows the analysis unit 10 with the Uster test. Two sensors 53, 54 are fastened to a holder 52 in an adjustable vertical distance from one another. The holder 52 is in turn adjustable at a horizontal distance on the analysis unit 10. The rollers 19 of the analysis unit 10 pull the cotton 9a from the cotton roll 9, which is taken up between two take-off rollers 56 of a mini-Uster 55 and transported further. The cotton 9a sags in an arc between the sensors 53, 54. The speed specification or the test speed is specified by the Mini-Uster 55. Correspondingly at the same speed, the rollers 19 have to pull the cotton 9a off the cotton roll 9. If the take-off speed of the rollers 19 is too high, the cotton 9a sags and is detected by the sensor 54. This sends a signal to a control unit, which is part of the analysis unit 10 and reduces the take-off speed of the rollers 19. If the take-off speed of the rollers 19 is too low, the arc formed by the cotton 9a is reduced and the cotton 9a is detected by the sensor 53. This sends a signal to the control unit with which the rollers 19 are operated faster. The sensors 53, 54 can be designed as reflected light barriers. For example, an MS 120 can be used as the Mini-Uster 55, with which all common tests can be carried out and documented, for example a CV measurement or the creation of spectrograms. It has turned out to be a particular advantage that a constant tensioning delay, homogeneous over the winding width, is achieved when the wadding 9a is unwound, since the winding is driven. The gathering of the cotton 9a takes place in a relaxed state without influencing the unrolling of the cotton 9a. It is necessary to gather the cotton wool so that it can be passed completely through the measuring slot of the Mini-Uster 55. A baffle 57 takes over the gathering of the cotton 9a.
    Another advantage is the regulation of the speed in the analysis unit 10, whereby fluctuations in the speed between the Mini-Uster 55 and the analysis unit 10 can be compensated.
    As a further measuring system, the analysis unit 10 can have a moisture measuring system with which the moisture content in the fibers of the cotton roll 9 can be determined. Optical measuring sensors can be used as measuring devices, whose emitted light is absorbed by the material moisture. Alternatively, microwave-based measuring systems or electrical resistance measuring devices that measure the material moisture can also be used.
    The optimum moisture for cotton has been found to have a spinning climate in the spinning mill of 60% atmospheric humidity at, for example, a temperature of 24 ° C., the material moisture being the decisive factor. It has been found that too little moisture in the fiber material has a negative influence on the formation of bubbles during the winding process, as a result of which the layer structure of the winding is influenced, for example by warping. If the humidity is too low, the hardness of the winding decreases and the opening of the winding can increase by about 1/3. Furthermore, the rolling behavior and the hairiness of the wrap are worse than with a higher air humidity. The invention makes use of the knowledge that, for example, cotton is easier to process in a moist state than in a dry state, since the strength increases, while the fiber stiffness and friction decrease. Depending on the moisture content of the material to be processed, the winding machine can be set with the measured data by optimizing the winding speed, the winding pressure and / or the penetration depth of the pre-compressor and / or the warping of the sliver between the individual components. This can be done differently when processing cotton than when processing fiber blends with, for example, a high proportion of polyester fibers.
    When processing polyester fibers, an even higher atmospheric humidity is desirable, since the static charge of the fibers decreases with increasing atmospheric humidity and these can therefore be processed better.
    Depending on the fibers to be processed and the climatic changes, on the one hand the machine parameters of the winding machine can be changed together or individually in order to ensure adequate product quality. On the other hand, this ensures that the winding machine runs with the highest productivity in an optimal climate.
    As a further measuring system, a hairiness measuring system 60 can be integrated in the analysis unit 10. The hairiness of the wadding surface is an important quality feature with which the unrolling behavior of the wadding roll 9 and the percentage of combed hair can be deduced. The hairiness can be determined visually by means of a comparative evaluation board or by means of digital image processing or by means of a gravimetric analysis. In contrast to the prior art, the hairiness is measured here over the entire width of the batting 9a or over the entire width of the batting 9, since this determines the rolling behavior. Furthermore, the hairiness is not determined only when the cotton roll 9 lies on the comber, but beforehand, so that the further production of the cotton roll 9 can be influenced.
    In the visual hairiness measurement, the qualities of the cotton wadding 9 with regard to hairiness can be divided into different quality classes with the aid of evaluation boards. The division is based on the existing hairiness over the winding width. Relevant for the evaluation are e.g. the amount of protruding fibers and the length of the protruding fibers. The number of classes is freely selectable. Several example photos of the class are shown on each board. Several photos of the same class give a better overview of the characteristic ones
    CH 708 698 B1
    Properties of the class as a single picture. The cotton roll 9 is shown on the evaluation boards over the entire width and the winding contour is defined as a zero line. Starting from this zero line, protruding fibers are referred to as "hairiness". A predefined scaling can make it easier for the operator to classify them into quality classes. In order to ensure that the windings can be compared with one another, a test specification is defined. It is determined
    - that the winding surface is assessed from a defined position,
    the unwinding speed in the assessment, which can correspond, for example, to the combing speed,
    - The duration of the assessment (for example over a length of 3 m of cotton wool. The test staff observes the hairiness in this length range and assigns a hairiness class. Since the hairiness fluctuates, a value must be assigned over the length).
    Furthermore, it should be noted that the lighting situation and the background are selected in the assessment such that no differences occur in the assessment due to these two parameters. According to FIG. 7 a, a black board 61 can be attached to the analysis unit 10 as a background. The background is positioned in such a way that no interference e.g. caused by light reflection. If necessary, a camera 62 can be adjustably arranged on a fastening 63 on the hairiness measuring system 60 in order to additionally document the present hairiness with the aid of images. The division into a hairiness class, however, is based on the visual assessment of the examiner based on the hairiness picture over the specified test duration and not on the basis of individual shots. Assessment using assessment boards is a very simple procedure that can be used in practice without any effort. With the help of the evaluation boards, the hairiness can also be assessed when the material is unrolled on the comber (the above criteria must be observed in order to obtain a reproducible test result).
    The hairiness measurement system 60 by means of digital image processing can be constructed in the same way as shown in FIG. 7a. Instead of the normal camera 62 for documenting hairiness, a digital camera 62 is used here which interacts with evaluation software and digitally scans the image. The gray values determined in the process are compared with stored predetermined data and evaluated. This is an objective hairiness measurement. The number of measured values per winding can be freely selected. However, the zero line must be defined in advance, whereby deviations of the winding contour from the zero line must be taken into account. For example, a value for the mean deviation and its standard deviation can be specified. With the digital hairiness measurement system 60, a value for hairiness, e.g. a brightness value can be determined, the classification levels to be compared being freely selectable. Further evaluations, such as the course of hairiness over the length of the wrap, are possible. Because the camera 62 can be adjusted by means of the fastening 63, the height of the camera can be adjusted in accordance with the winding diameter (tangential hairiness analysis to assess the winding surface). In addition, the cotton 9 can be deflected in the measuring area, the cotton being analyzed at the deflection at a constant position. The deflection of the fiber material must take place in such a way that it has no influence on the winding surface. A measurement is thus carried out over the entire winding width, which allows conclusions to be drawn about the unwind behavior. The winding surface is also analyzed on the stationary winding and a defined lighting can be carried out at a constant, e.g. black background.
    According to FIG. 7b, the gravimetric hairiness measuring system 60 comprises a support 65, over which the cotton 9a is pulled off. The cotton roll 9 rests on the rollers 18 and is unwound via the rollers 19 which clamp the cotton 9a. A fixed comb 64 is arranged above the support 65 and can also be used with the same fineness in the following combing machine. The cotton 9a runs over a predetermined length, for example 3 m, over the support 65, the fixed comb 64 receiving the fibers which protrude at a certain height. The quantity of fibers taken up by the fixed comb 64 after a certain test length is used as a measurement for the hairiness. To accommodate the fixed comb 64, the analysis unit 10 provides a fastening arranged on the side of the housing. The support 65 can also be swiveled out of the analysis unit 10 with one hand or positioned there in a device. In order to achieve comparable hairiness values, depending on the material or the production parameters during the manufacture of the wrap, the following parameters must be specified during the measurement in a test specification and kept constant during comparative measurements:
    • Needle length of the needles in the fixed comb 64 • Number of needles / cm • Angle of attack and distance of the fixed comb 64 from the surface of the cotton 9a. It is important when determining the test specification that the needles of the fixed comb 64 can absorb the fibers constantly and not saturation is achieved with fiber material before the end of the test. If there are too many fibers in the fixed comb 64, e.g. Tufts of fibers are no longer detected and migrate under the fixed comb 64. As an alternative to the fixed comb of a comber, any defined row of needles can also be used.
    CH 708 698 B1 The amount of fiber taken up is weighed according to a predetermined length of wadding. As a rule, this length should not be changed within the tests to be compared. The combed fiber quantities can be evaluated as follows:
    • Course of hairiness over the winding length (weight change over the winding length) • Assignment of certain fiber quantities in the fixed comb to evaluation classes (number of classes freely selectable) • Comparison of the separated fiber masses with values that e.g. be eliminated in a defined «standard wrap».
    In comparison to the prior art, all three variants of the hairiness measurement system 60 determine the hairiness over the width of the roll 9, which means that the unwinding behavior can be determined more clearly than with a measurement at the edge of the roll 9.
    [0053] As a further measuring system, a force measuring system can be integrated into the analysis unit 10, with which the layer pattern of the cotton roll 9 can be determined. As a result, the uniformity of the fiber distribution in the cotton 9a can be determined, which is crucial for the fiber clamping in the pliers of the comber. The more homogeneous the force distribution, the more even the wadding is.
    The force measuring system can preferably be arranged on the rollers 19. Possible embodiments can be the use of a Tekscan film on the clamping surface of the rollers 19 in which the material is located. Measurements are taken when the material is at a standstill and under a defined load on the rollers 19, which can be generated for example by means of springs or pneumatically. A further measuring position can also be arranged in the manual tape stripper 20. Alternatively, additional clamping points can also be adapted for the measurements on the analysis unit 10, to which a defined force is applied during the measurement. This may make sense in order to simplify the measurement setup, or if, for example, due to the use of a weighing system 30 for sorting, there is no manual tape stripper 20 on the analysis unit 10.
    As an alternative to the Tekscan film, it is also possible to use a segmented tape stripper which functions according to a segmented trough in the material feed on the card. A measurement with running material is possible.
    In a further embodiment, the rollers 19 can be equipped with a permanently installed force measuring system, for example by means of load cells or other sensors, which are permanently connected to the control device of the analysis unit 10 and can simultaneously provide documentation.
    The analysis unit 10 is also suitable for assessing the rolling behavior, warping, transverse folding or the tendency of the cotton roll 9 to stick. The unrolling behavior can be assessed on the analysis unit 10 under constant conditions, since a constant unwinding speed is guaranteed for the testing process. To do this, the viewing position and the lighting must be constant. The assessment can be carried out visually or by means of a camera system, which in particular analyzes the roll gusset area.
    Warps have a negative effect on the combing process, since these inhomogeneous places in the cotton 9a can lead to poor fiber clamping in the combing pliers and to poor quality combing behavior, because these are areas with a very uneven fiber distribution. The rolling process on the analysis unit 10 makes it possible to determine the number of faults and to classify them. This is done by observing the test personnel.
    Cross folds have a negative effect on the combing process, since these inhomogeneous locations in the lap wadding can lead to poor fiber clamping in the combing pliers and to poor quality combing behavior. The rolling process on the analysis unit makes it possible to determine the number of transverse folds by observation and to classify them, for example according to the number of transverse fold areas per winding length, frequency and distribution of the transverse folds.
    [0060] During the analysis of a roll, dirt particles are deposited on the rollers 18, 19. After the end of the test, the number of these particles is placed in relation to the unwound length of the cotton 9a. This makes it possible to draw conclusions about the tendency to stick or the sticking behavior of the fiber material, which are caused, for example, by honeydew.
    All of the measuring systems listed above can be arranged together as a module or in any combination in the analysis unit. The analysis unit can thus be individually adapted to customer requirements or can be made available to the company's own service personnel in full equipment in order to optimize the wadding rolls to be produced in a spinning mill for the subsequent combing process.
    In Fig. 8, a winding machine 1 is shown, as it is used for example in the combing preparation in the textile industry. Several slivers 3, which can consist of natural or synthetic fibers, are fed to the winding machine 1 via cans and are evened out in a drafting system, not shown. The fiber8
    CH 708 698 B1 bander 3 are further passed via an inlet area 2 to a plurality of pressure rollers 4a-4c, which guide the fiber tapes 3 into the intake area between two winding rollers 5a, 5b and a winding tube 6 for the production of a cotton lap. A pre-compressor 8 is arranged in or on the inlet area 2, which makes the sliver 3 more uniform. The table calenders arranged in the inlet area, the drafting system arranged in front of the table calender and the creel arranged in front of the winding machine are not shown.
    As an alternative to this embodiment with the two winding rollers 5a, 5b, winding machines are known in which the winding is formed within a circulating belt or by a belt with a winding roller. However, the method for producing the cotton roll is not relevant to the invention.
    According to a further aspect, the winding machine 1 has means for detecting the cotton quality, which have a weighing system 30 and / or a measuring system for the winding hardness 40 and / or a loop unit 50 for connection to a user measurement and / or a moisture measuring system and / or may include a hairiness measurement system 60 and / or a force measurement system.
    These measuring systems can be integrated into the winding machine 1 in any combination (but at least two of them). In particular, the measuring systems for the winding machine 1 can be retrofitted (so that more than two measuring systems can also be present) if, for example, technical problems occur that have been proven to have the same cause. For example, the winding machine can be equipped or retrofitted with a moisture measuring system if very different fiber qualities are processed with fluctuating air humidity. The measuring systems can be connected to the control or regulation of the winding machine, in this case, for example, the moisture measuring system. The pressure of the winding rollers 5a, 5b, the penetration depth of the pre-compressor 8 and / or the winding speed can be adjusted depending on the moisture content determined in the fiber material. Other adjustable parameters can be the drives of the winding rollers, the drives of the pressure rollers, the drives of the table calenders and the drives of the upstream drafting system. The warp between the creel and the drafting system, the warping between the drafting system and the table calender, the warping between the table calender and the pressure rollers, and the warping between the pressure rollers and the winding rollers can thus be set. Other options for influencing the winding quality can be to change the wrap angle and / or the pressure of the pressure rollers or the wrap angle on the winding rollers.
    If the fiber material is too low, for example, the winding speed can be reduced from, for example, 180 m / min to 150 m / min in order to ensure the quality of the winding. Alternatively or additionally, the pressure of the winding rollers 5a, 5b can be increased from 6 bar to 8 bar, for example. In a further alternative or in addition, the webs in the precompressor can interlock with each other by, for example, 5 mm, so that the sliver is aligned and smoothed more strongly.
    The above-mentioned setting parameters of the winding machine 1 can also be adjusted on the basis of the measured or determined values from the weighing system 30 and / or the measuring system for the winding hardness 40 and / or the hairiness measuring system and / or the force measuring system, in order to determine the quality of the cotton winding to improve. For example, the moisture measuring system can be combined with the hairiness measuring system and / or the force measuring system in order to produce a cotton wrap 9 which has a very good rolling behavior. Any combination of the above-mentioned measuring systems is conceivable according to customer requirements, can also be subsequently integrated into the winding machine 1 and can be connected to the control / regulation of the winding machine. The determined values of the measuring systems can be used immediately to adjust the machine parameters for the current cotton roll or at the latest for the subsequent roll.
    It is advantageous if the measuring systems can be at least partially integrated in the outlet 6 of the winding machine 1, so that the just finished wound cotton lap can be checked and the values can be used in the control system for producing the subsequent cotton lap. Some of the measuring systems, for example the moisture measuring system, can also be arranged within the winding machine 1, for example in the run-in area 2, and can influence the machine parameters online.
    A further improvement can be achieved if the upper unit 12 of the analysis unit 10 can be used with a partial or complete combination of measuring systems in a receptacle of the run-out area 6 of the winding machine 1 and connected to the winding machine 1 electrically and in terms of control technology can. The finished winding is therefore not thrown into the winding carriage, but is first transported onto the rollers 18 within the upper unit 12. Only when the cotton wrap has been checked, for example every tenth, is it transported on to the winding wagon. This results in the possibility, with an analysis unit 10 in the spinning mill, of optimally setting all winding machines 1 at least partially automatically, without each winding machine 1 having to be equipped with the measuring systems. The advantage for the customer is that, for example, it is only when converting to high-quality fibers that the winding machine 1 needs to be set perfectly in order to optimize the subsequent combing process.
    The invention has the advantage that material-specific data can be recorded during production and interrelationships between the set parameters and the achievable product quality can be determined. This process knowledge enables the production parameters to be optimally adapted to the quality of the cotton rolls and the production output. The winding process can thus be assessed holistically. Another advantage is that the
    CH 708 698 B1 reproducible test sequence all achievable results are comparable with each other. It is possible to develop a database for various materials and machine settings that are used in the respective spinning mill. Each spinning mill can use it to develop a material-specific quality standard, which has a positive effect on the subsequent combing process.
    Reference numerals [0071]
    winder
    intake area
    sliver
    4a-4c pressure rollers
    5a, 5b winding roller
    discharge area
    Material flow direction
    supercharger
    lap
    9a cotton
    9b winding tube
    Analysis unit lower unit upper unit
    roll
    Handle
    spacer
    Control panel
    engine
    roll
    roll
    Bandabreisser
    sensor
    Rod 23a, b lever 24a, b sheet profile
    edge
    pivot point
    weighing system
    sensor
    pivot point
    CH 708 698 B1
    frame
    pole
    Measuring system winding hardness
    bracket
    linear guide
    admission
    sensor
    sensor
    reflector
    loop unit
    pole
    holder
    sensor
    sensor
    Mini-Uster
    off rolls
    baffle
    Haarigkeitsmesssystem
    blackboard
    camera
    attachment
    top comb
    edition
    A, B, C distances
    X, Y, Z distances
    权利要求:
    Claims (11)
    [1]
    1. Analysis unit for analyzing the quality of a cotton roll (9) wound in a winding machine (1), the analysis unit (10) having two spaced driven rollers (18) for taking up and unwinding the cotton roll (9), the unwound cotton (9a ) can be pulled off by means of two further driven rollers (19), characterized in that the analysis unit (10) has at least two measuring systems for recording the winding quality.
    [2]
    2. Analysis unit according to claim 1, characterized in that the analysis unit (10) has a sensor (21) with which the length of the unwound cotton (9a) can be determined directly or indirectly.
    [3]
    3. Analysis unit according to claim 2, characterized in that the analysis unit (10) has a tape puller (20) with which a predetermined length of cotton (9a) can be removed manually.
    [4]
    4. Analysis unit according to claim 1, characterized in that the at least two measuring systems of the analysis unit (10) have at least two of the following measuring systems: a weighing system (30), a measuring system for measuring the winding hardness (40), a loop unit (50) for measurement the take-off speed of the two further driven rollers (19) and for connection to an Uster measurement, a moisture measurement system, a Haa11
    CH 708 698 B1 rength measuring system (60), a force measuring system for determining the position of the lap of cotton by measuring the forces exerted by the cotton on the other driven rollers (19).
    [5]
    5. Analysis unit according to claim 1, characterized in that the measured values of the measuring systems can be processed together in an evaluation unit of the analysis unit.
    [6]
    6. Analysis unit according to claim 5, characterized in that the evaluation unit is designed such that it can be connected to a winding machine (1) for setting the machine parameters of the winding machine.
    [7]
    7. Analysis unit according to claim 1, characterized in that the analysis unit (10) has an upper and a lower unit (11, 12) which are separable from each other.
    [8]
    8. Analysis unit according to one of claims 3 to 7, characterized in that the tape tear-off (20) or the weighing system (30) and / or the measuring system for the winding hardness (40) and / or the loop unit (50) and / or the moisture measuring system and / or the hairiness measuring system and / or the force measuring system are arranged in the upper unit (12).
    [9]
    9. Analysis unit according to one of claims 7 or 8, characterized in that the lower unit (11) has rollers (13), whereby the analysis unit (10) can be moved.
    [10]
    10. winding machine for winding fiber tapes, with a winding unit in which a cotton lap (1) is formed in operation, characterized in that the winding machine (1) further comprises an analysis unit (10) according to one of the preceding claims.
    [11]
    11. Winding machine according to claim 10, characterized in that the analysis unit is designed as an analysis unit according to claims 7 and 8, wherein the upper unit (12) is integrated in the outlet area (6) of the winding machine (1).
    CH 708 698 B1
    CH 708 698 B1
    CH 708 698 B1
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    同族专利:
    公开号 | 公开日
    DE102013110917A1|2015-04-02|
    CH708698A2|2015-04-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE102015104796A1|2015-03-27|2016-09-29|TRüTZSCHLER GMBH & CO. KG|Analysis unit for hairiness determination of a lap roll and combing machine with such an analysis unit|
    WO2019211869A1|2018-05-03|2019-11-07|Parthassarathy N|Fibre testing apparatus comprising rollers, scale, pad|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE201310110917|DE102013110917A1|2013-10-01|2013-10-01|Analysis unit for testing cotton wadding and winding machine for producing cotton wool wraps|
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