CN1047000C - Method of diagnosing faults in a synthetic-yarn manufacturing process - Google Patents
Method of diagnosing faults in a synthetic-yarn manufacturing process Download PDFInfo
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- CN1047000C CN1047000C CN94190241.2A CN94190241A CN1047000C CN 1047000 C CN1047000 C CN 1047000C CN 94190241 A CN94190241 A CN 94190241A CN 1047000 C CN1047000 C CN 1047000C
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0224—Process history based detection method, e.g. whereby history implies the availability of large amounts of data
- G05B23/0227—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions
- G05B23/0229—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions knowledge based, e.g. expert systems; genetic algorithms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/006—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package quality control of the package
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
- B65H63/06—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to presence of irregularities in running material, e.g. for severing the material at irregularities ; Control of the correct working of the yarn cleaner
- B65H63/062—Electronic slub detector
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/32—Counting, measuring, recording or registering devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/36—Textiles
- G01N33/365—Textiles filiform textiles, e.g. yarns
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D15/00—Control of mechanical force or stress; Control of mechanical pressure
- G05D15/01—Control of mechanical force or stress; Control of mechanical pressure characterised by the use of electric means
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
- G07C3/14—Quality control systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2557/00—Means for control not provided for in groups B65H2551/00 - B65H2555/00
- B65H2557/60—Details of processes or procedures
- B65H2557/65—Details of processes or procedures for diagnosing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Abstract
The invention concerns a method of fault diagnosis for a synthetic-yarn manufacturing process, the method calling for a first process parameter, dependent on the process control, to be continuously measured and analysed, and an indication signal to be generated depending on the result of the analysis or on a derived curve, at least one further (reference) parameter, also dependent on the process, being continuously measured and analysed and the indication signal generated when fault-typical behaviour is detected in the first and at least one further parameter.
Description
The present invention relates to judge in a kind of production routine of synthetic filaments the method for defective.
This method is known by a kind of false twisting Weaving method of EP-A0207471 (shellfish lattice 1474).Prove simultaneously, the long filament stress of after a friction false twist, measuring, have the judgment of expectation for the quality of production long filament and bobbin, at this moment, from successive measurements, obtain suitable indicated value (in known manner: mean value) and carry out an appropriate evaluation.But it is only applicable to the false twisting Weaving method according to existing knowledge.
Make in the method for synthetic filaments at another, particularly in spinning process, fast in the spinning process, in the stretch spinning method and in spinning-tractive method, verified do not have a similar long filament stress judgment.This point should be summed up as the method significant complexity of this method especially, and wherein, many program parameters produce different effects for long filament stress.
Also have other method parameter can not to the long filament produced and and then the quality of the bobbin made comprehensive judge effect is arranged.
Task of the present invention is, in the continuous spinning program of a synthetic filaments by measure the data that obtain for the long filament of being produced and and then the quality of the bobbin made have judgment.For this reason, these data should be able to be by controls or are regulated and to provide a quality of proofreading and correct about the product produced and/or program run and method to judge.Also have, producing substandard products in emergency circumstances, should be able to realize production routine early interruption and avoid waste product.
This task of the present invention, realize by following characteristics, a kind of method of in the production routine of synthetic filaments, judging defective, this method comprises the steps: to finish production routine, comprising: with continuous synthetic filaments along the operation passage advance and with this winding filament that is just advancing on bobbin; Monitor first parameter, this first parameter depends on production routine or bobbin and produces one first output signal, this first output signal is the function of monitored first parameter, and wherein, first parameter comprises the propelling of this long filament that is just advancing along with it, the stress that is recorded on predicted position; Monitoring at least the second parameter, this second parameter depend on production routine or bobbin and produce one second output signal, and this second output signal is the function of monitored second parameter; Produce indicator signal; When first output signal and at least the second output signal are determined a state of representing defective, just produce an indicator signal.
The present invention judges the method for defective in the production routine of synthetic filaments, this method comprises the steps: to finish production routine, comprise: continuous synthetic filaments is held together to form a yarn that is just advancing along the propelling of operation passage with this synthetic filaments collection that is just advancing, with the above-mentioned reel for yarn that is just advancing on bobbin, and in the anterior program of coiling step, the above-mentioned yarn that is just advancing is contacted with draw-off godet, monitor the yarn stress of above-mentioned draw-off godet upstream, and produce one first output signal, it is the function of monitored upstream yarn stress, monitor the yarn stress in above-mentioned draw-off godet downstream, and produce one second output signal, it is the function of the yarn stress in monitored draw-off godet downstream, and when first output signal and second output signal demonstrate a kind of defect state, produces an indicator signal.
The present invention judges the method for defective in the production routine of synthetic filaments, this method comprises the steps: to finish production routine, comprise: the extruding of thermoplastic material, to form many continuous synthetic filaments, along operation passage advancing filament, the material of above-mentioned propelling flocked together constitute a yarn that is just advancing, and with the above-mentioned reel for yarn that is just advancing on bobbin, monitor first parameter of the above-mentioned yarn that is just advancing, described first parameter depends on production routine or bobbin, and produce one first output signal, it is a function of monitored first parameter, monitor second parameter of the above-mentioned yarn that is just advancing, described second parameter depends on production routine or bobbin, and produce one second output signal, it is a function of monitored second parameter, and when first output signal and at least the second output signal demonstrate a kind of defect state, produce an indicator signal, the step of wherein finishing production routine also comprises, the described yarn that is just advancing is contacted with draw-off godet, and described first parameter comprise the yarn stress of described draw-off godet upstream and the yarn stress that described second parameter comprises the draw-off godet downstream.
In addition, judge, be interpreted as except original defective is judged sequential monitoring and the program run of on this defective judgement basis, implementing in addition about defective.(Fehler) on the wideest meaning, say the skew that is interpreted as each normal relatively program parameter and long filament parameter about " defective ".
In the methods of the invention, at first first program parameter that depends on program run is detected continuously; The measured value curve that records is like this assessed continuously; Then, according to this assessment or one indicator signal of assessment generation of the measured value curve curve of deriving thus.In addition, at least one depends on that second program parameter of program run is detected continuously and assesses equally.When first with when another program parameter place determines a state of representing defective at least, produce an indicator signal.This first and at least the second program parameter can be a relation of interdependence.One herein the defective in the limiting meaning will disturb above-mentioned producing according to relation, and then be formed for the home position of a detection.This first and at least this second program parameter can be independent of each other.A defective can be disturbed this independence, that is to say during forming this detection can change in two program parameters with the defective of home position to detect.The defective of determining will make at least two program parameters cause representational variation, that is to say that these program parameters are represented a state of representing defective.
In first embodiment of the invention, that is in the method, these at least two program parameters are simultaneously relatively or show mutual relationship with the time, then, produce an indicator signal, at this moment, the state of this representative defective shows the skew of a relative normal procedure curve.
In another embodiment of the inventive method, at least two program parameters are done the logic combination.When this logic is the curve of representative defective in conjunction with relative normal procedure curve of indication, then produce a indicator signal based on this.
This method can be applicable in a kind of spinning technique of synthetic filaments especially.Simultaneously, this winding speed can be higher than 2000m/min (rice/minute) and long filament can the extraction of straight-line pass spinning-nozzle by collecting device.Just produce one in this way and give directed long filament (pre-orientated Yarn=POY).For making this POY, can also middlely insert a draw-off godet.By further raising winding speed, can also realize an orientation completely, particularly by heating arrangement of middle access, just can produce a long filament (fully orientated yarn) of the stretching of orientation fully.On the other hand, also possible is, inserts a draw-off godet in program, and its tractive perhaps is provided with a tractive level that is made of a plurality of draw-off godets by the long filament that spinning-nozzle comes.Under the method for monitoring situation of abandoning so far, monitor no longer suitable by the one-dimensional of only assessing a parameter.But, at least assess two parameters and be that the method for carrying out a kind of bidimensional or multidimensional (amount net) in this wise monitors, wherein, for example make comparisons again simultaneously or show mutually relation over time about the supervision result of two or more parameters, and/or do mutually logic in conjunction with and according to this in conjunction with obtaining flaw indication.
Simultaneously should consider all numerical value as program parameter and basic parameter, these numerical value can form (long filament temperature on the operation long filament of bobbin, long filament pulling force=long filament stress, yarn speed) and (bobbin parameter: diameter, weight, the skew of the protuberance of end face selvedge=desirable column structure) (revolution, speed or on the mechanical component that this method is determined, temperature, torque is born) continuously or be interrupted and predict sometimes.
Obviously, the variation of not every method parameter all has an effect to quality.In order to improve the judgment of this comprehensive observing, advantageous particularly and satisfactory be (claim 5), at first detect the critical curve that is applicable to each parameter by experience (on purpose using artificial program (technology) skew of making and critical conditions give row test).To come out as the relevant parameter curve sign of critical curve simultaneously, and these curves are the sign signals for bugs or the product defects determined.And can relate to the absolute value of the continuous coverage value of relevant parameter, extreme value, and relevant parameter measured value, curve over time, first or second differentiate, also relate to standard deviation or each other numerical value of deriving, and this numerical value is judicious for defective by relevant parameter.Possible especially is, is stored in the storer (claim 4) as defect model to the family curve of one of these described numerical value of major general.Different defectives, the slubbing in the long filament for example, knotting can the manual type manufacturing, and wherein, they are for the consideration parameter, and particularly the effect of long filament stress is accurately noted and be can be used as corresponding defect model and stored.To this, can also be with reference to undocumented oneself application: DE-A4314049.1 (shellfish lattice 2115 are consistent).
As parameter, long filament stress particularly, bobbin weight, the long filament rugosity, the long filament temperature perhaps also has for example spinneret pressure of each other adjusting parameter, pump revolution, the spinneret temperature, the draw-off godet revolution, the draw-off godet temperature can be considered.As basic parameter, particularly enroll the adjusting parameter of program in addition and when predetermined this adjusting parameter is not the constant curve, then should not consider.Parameter as such program of enrolling can be considered to-and-fro movement and reciprocating speed especially, and the long filament stress that they detect the winding area produces a decisive influence.Essentially under all these class situations be to place the mutual relationship neutralization to detect their mutual dependences measured value and the quantity (it has been distinguishing by their dimension at first) that derives thus.This point is unnecessary in the method for claim 7.Simultaneously, the parameter of a same form, for example long filament stress will be in that for example the drawing zone between two draw-off godets be inner and detect in the winding area on the other hand on the one hand on the diverse location of spinning program.
Describe the present invention by embodiment below, but the present invention is not limited to this.
Fig. 1 shows procedure with sketch,, that is use an embodiment be used to make and the spinning process of the chemical-fibres filaments that stretches.
Fig. 2 shows another embodiment of the present invention, and suitable Fig. 1 illustrates accordingly.
About spinning process:
One long filament 1 is formed by a kind of thermoplastic spinning.This thermoplastic is given extruder 3 by a filler device 2.3 of this extruders pass through a motor 4 and drive.Motor 4 is by 8 controls of a motor control assembly.In extruder, this thermoplastic is melted.Therefore be used for deformation operation on the one hand, this deformation operation imposes on material by extruder.The heating arrangement 5 that a structure is set in addition is resistance heated, it is controlled by heating control apparatus 50.By fusant pipeline 6 (it can be provided with a pressure sizer 7), this melt just can arrive gear-type pump 9, and it is driven by pump motor 44.This pump motor is so controlled by apparatus for controlling pump 45, and promptly pump revolution can be done meticulous adjusting.This pump 9 is transported to heated spinneret (case) 10 with fusant stream, is equipped with spinning nozzle 11 at its downside.From this spinning-nozzle 11, melt is sent with the form of meticulous monofilament strand 12.These monofilament strands are by a cooling cylinder 14.In cooling cylinder 14, laterally or radially blow one airflow facing to the monofilament group by blowning installation 15.Monofilament is cooled according to this.
In the end of cooling cylinder 14, this monofilament group is just held synthetic strand of long yarn 1 and is covered with arrangement liquid by a finish roll 13.This long filament is just extracted out from spinneret and cooling cylinder by tractive draw-off godet 16.Long filament is also repeatedly around this draw-off godet.For this reason, one and draw-off godet 16 staggered leading around rolling 17 of settling are set.This leads around rolling 17 is free rotating.This draw-off godet 16 is by draw-off godet motor 18 and the speed drive that can set up in advance of frequency sender 22 usefulness.This draw rate is to exceed than the natural efflux velocity that monofilament comes out from spinneret 11 to many times.
After this drawing-off draw-off godet 16 is a pair of tractive draw-off godet 19.1 and 19.2 of leading in addition around rolling 20.1 and 20.2 that has.This two draw-off godet make peace with regard to its structure the band lead around the drawing-off draw-off godet 16 that rolls 17 consistent.Be provided with the tractive motor 21.1 and 21.2 that has frequency sender 23.1 and 23.2 in order to drive this draw-off godet 19.1 and 19.2.This frequency sender 22.23.1 and 23.2 incoming frequency are to determine equably by controlled frequency sender 24.With this type and mode, just can be on frequency sender 22,23.1 and 23.2 each ground regulate the revolution of drawing-off draw-off godet 16 and tractive draw-off godet 19.1 and 19.2.In contrast, the velocity stage (level) of drawing-off draw-off godet 16 and tractive draw-off godet 19.1,19.2 can be done collective's adjusting on frequency sender 24.
This first tractive draw-off godet 19.1 has a heating arrangement 53, by its this draw-off godet shell can be heated and correspondingly long filament also can be heated.Thus, the long filament characteristic that realizes by traction action just can other program obtain influence.The temperature of this heating arrangement 53 can be regulated by heating control apparatus 52.
From last tractive draw-off godet 19.2, this long filament 1 just arrives so-called " top yarn guide " 25 and arrives reciprocal trigonum 26 from here.Only described reciprocating apparatus 27 in Fig. 2, it is the wherein fro guiding-yarn device of leading of thread roller and that circles round, this yarn guide make long filament on the length of bobbin 33, does toward with anti-leading (reciprocating stroke, double stroke).Simultaneously, this long filament twines a touch roll 28 of only describing in the back of reciprocating apparatus 27 in Fig. 1.This touch roll 28 rests on the surface of bobbin 33.It is used to measure the superficial velocity of bobbin 33.This bobbin 33 constitutes on a sleeve pipe 35.This sleeve pipe 35 is clamped on the shaft of bobbin 34.34 of this tubular axis pass through shaft coupling motor 36 and shaft coupling control device 37 so drives, and promptly the superficial velocity of bobbin 33 keeps constant.The tubular axis revolution just descends with hyperbolic curve in the bobbin operational process according to this.For the superficial velocity that makes bobbin 33 keeps constant, the revolution that freely turns touch roll 28 as regulated quantity is that the pulse transmitter scanning by a ferromagnetic inserts and a magnetic obtains on the contact roll shaft, and shaft coupling motor 36 is then controlled according to the output signal of pulse transmitter.
This reciprocating apparatus 27 drives by a reciprocating motor 56.56 of this reciprocating motors are controlled (Fig. 2) by a reciprocal control device 57.
After the second tractive draw-off godet 19.2, a long filament strain gauge (equaling long filament pulling force detecting device) 8 is set places the long filament stroke.Produce a signal by it, it is representing the long filament pulling force.Should before being input to computing machine, also to be flattened processing by the signal of yarn thread tension sensor output.Output signal at first is transported in the wave filter 61 for this reason.In wave filter 61, the cyclical variation of the corresponding to long filament pulling force of its frequency and reciprocating frequence is flattened processing.Therefore, in the output instrument of long filament pulling force, only also demonstrate this because the variation that other high frequency short-term event causes.But also will consider that these fluctuate based on the long filament pulling force that reciprocating speed changes this moment in smooth in this way long filament tension variations curve.The variation of this long filament pulling force also causes by to-and-fro movement itself, that is to say, owing to the axially reciprocal leading of long filament along bobbin causes.Simultaneously, the long filament stroke between top yarn guide 25 and reciprocating apparatus is that sequential action along with long filament pulling force respective change periodically prolongs and shortens.This long filament tension variations has the frequency identical with to-and-fro movement.This reciprocating frequence is to give earlier and stipulating by double stroke number in the unit interval (of the fro guiding-yarn device toward and return motion).Prevailing value 500 and 1500 double strokees/minute between.By the influence of this fluctuation in short-term,, can be excluded equally as long as the output signal of long filament pulling force detecting device 8 is sent by wave filter 61 to long filament pulling force signal.This wave filter comprises general electronic structure element, but they can realize the adjustable as far as possible smooth processing of hope to output signal.By suitable adjusting just can realize to this wave filter, this thread-tension that occurs owing to reciprocating frequence changes elimination and converts a mean value to still being.But, using when of the present invention be as preferred also possible, the reciprocating frequence predetermined value of these long filament pulling force fluctuations and a storage is compared and only with differential wave further as corrected value (referring to, continuation description after this).Then, this signal conveys of having eliminated HFS is given the thread-tension dispensing device.
In device 48, this long filament pulling force of measuring continuously just sends (thread-tension sweep record) as long filament pulling force record.The output signal of this device 48 just is sent to a computing unit 46.In counter 46, can store being used for the thread-tension record that whole bobbins moves or main-selected a part of bobbin moves.Simultaneously, in the mode of the embodiment of present techniques scheme and description subsequently long filament pulling force signal is processed processing.
The calculator structure that is used for all embodiment is identical descriptions for two figure.At first this counter has a comparing unit 58.The task that this comparing unit has in one embodiment of the invention is that the reciprocating speed of reciprocal regular reservoir 47 and the long filament pulling force signal of thread-tension dispensing device 48 are linked to each other.Just can predict the relation of interdependence of long filament tension variations curve and reciprocating speed change curve according to this.Simultaneously, making us interested especially is that reciprocating speed concerns over time.Not only change intensity but also pace of change, that is all influential with this above-mentioned variation of mode that the time is differentiated to the long filament pulling force.By the conversion factor that detects previously, just the change curve of reciprocating speed can be converted into the pulling force of supposition, as caused by the variation of reciprocating speed.In the tension variations curve of this supposition, can also mention as top, consider because the variation that to-and-fro movement itself produces.Detection about conversion factor will be described later.In any case, the long filament pulling force supposition numerical value of being derived by reciprocating speed will deduct the actual value of long filament pulling force.This differential wave has just shown that those are not by reciprocating speed and the caused long filament tension variations of reciprocating variation then.This long filament pulling force signal is demarcated in the application's scope and is correction signal B.The generation of the correction signal of Miao Shuing also occurs among the embodiment of Fig. 2 like this, does not show but have there.What this was spelt out is, this and the related correction signal of to-and-fro movement with the requiring consistent and be suitable for the usefulness of judge of a multiple dimension quality supervision of the application.Other observation dimension will be described below.What should mention is that these other observation dimensions can also be applied directly on the long filament pulling force signal 48 for this reason.And cause with this long line pulling force class signal like judgment improve.But just obtaining a precision by the reference correction with respect to the reciprocal rule of stipulating described herein judges.
This correction signal B, that is deliver in another comparison means 66 of counter 46.In this comparing unit, on the one hand the correction signal that is obtained by the long filament pulling force may continue to be processed to a numerical value of deriving thus again, the mean value that changes of signal for example, first or second differentiate (over time), standard deviation, roughness or similar parameters; On the other hand, this corrected value and the numerical value of deriving thus and another parameter are compared.According to this, will relate to a method parameter and/or a product parameters in principle.
In Fig. 1, the diameter of bobbin 33 is predicted or is obtained a numerical value of being derived by diameter continuously as other state parameter.Also to consider weight as this numerical value.Certainly also to relate to disturbing factor then, as density, ambient air, the angle of the crossing or the similar factor of reeling.Therefore the weight that is detected cannot be considered as absolute value.In order to measure diameter, the revolution of the revolution of tubular axis 34 and touch roll 28 (it rests on the surface of bobbin) will detect.Be provided with ferromagnetic inserts 30,38 in tubular axis 34 and touch roll 28 and corresponding pulse transmitter 31,39 for this reason.At the revolution that makes touch roll 28 by shaft coupling control device 37, as (see above) during the adjusting value of regulating shaft coupling motor 36, the revolution of shaft coupling 34 also can be used for controlling reciprocating apparatus 27 simultaneously, (to this can referring to Fig. 2).But two signals will add and be converted into diameter D.For this reason, a computing unit 67 is set, it receives this two signals.Described diameter signal then is transported in the comparing unit 66.As preferably, can also from this diameter signal, derive another signal, it replaces diameter signal or additionally is transported in this comparing unit 66.As the signal of this derivation, should consider the quadratic power of this diameter especially, perhaps the mathematics differentiate first time of diameter quadratic power.This derivative is a constant certainly equally, because yarn speed is a constant.This first-order derivative also is proportional with the amount of thread that provides.When determining in comparing unit 66, these deviations are and the simultaneous words of the interference of yarn pulling force, and then conclusive inference may extend on method operation and the product, that is yarn, or on the bobbin by its coiling.
In comparison means 66, two state parameters are carried out a comparison like this.Simultaneously, this speech " comparison " is interpreted as the most wide connotation.Also relate to one herein and ask poor.For this reason, at first obtain a unified order of magnitude for two parameters.But can also relate to one is not the comparison of mathematical meaning.Under two RSTs, just can predict for example extreme value and definite of critical curve like this, these extreme values whether go up to taking place simultaneously or mutual relationship at least in time by the time.When such one relation obtains over time, just can reason out definite defective thus.But can also be applicable to opposite situation equally.That is to say, when critical curve only takes place under a this amount situation, so, defective that this sign just can be used to determine or defective inducement.
Same possible is that these parameters are placed mutual relationship according to a definite weighting.
At last, the output signal of this comparing unit 66 is given in another comparing unit 59.In this comparing unit, can carry out a comparison with ratings, this ratings is provided by ratings transmitter 60.According to this relatively, quality signal has just formed and has been sent out by counter.
This quality signal Q (its generation is described as the front) does following further processing: this quality signal can be used as alarm optics or acoustics or record sends.Use this record, the bobbin of this manufacturing is marked and by classification.These output signals of counter 46 can be applied to regulate value especially, promptly are used to regulate the adjusting parameter of spinning program and stretching run.But counter 46 these output signals can also be used for the qualitative character mark of the bobbin of these manufacturings, and these bobbins are made according to this method.
According to this, by the ratings transmitter, just can be identified for the tolerance of corrected value, value and the defective boundary that derives thus just can be measured according to them in other words, and whether a bobbin should be assessed as the A-quality, B-quality or as waste product.
But this quality signal Q can also only be used as alarm signal and for example be used for interrupt routine and avoid waste product.
This quality signal can be preferably or append mode issue one or more control device especially:
22 be used for the tractive draw-off godet and/or
23.1 23.2 are used for second tractive draw-off godet 19.1 and/or 19.2, so that influence stretching action;
24 are used to control draw rate
45 are used for the control pump revolution
49 are used to control the extruder revolution
50 are used to control heating arrangement
51 are used to control cooling device (blowing the firing rate degree)
37 are used to control winding speed
52 are used to control the draw-off godet heating
45 are used to control dosing pump assembly.Then, this Extruder Control is then controlled when not using volume pump 9 especially.In this case, this extruder works as pump and the control by Extruder Control, that is to say that the revolution by extruder can influence the discharge efficient of extruder.
When using volume pump 9, the turnout by spinneret 10 and spinning-nozzle 11 just can be controlled 45 control that is the revolution of volume pump 9 influences by pump.
By the control of cooling air control device 51, make cooling effect be controlled influence.So just can influence the gauze fineness.Special also possible is that by using special cooling device, going influences the uniformity coefficient that single monofilament twists, and removes to cool off fan-shaped monofilament group and/or spinning-nozzle with this special cooling device.
In the embodiment of Fig. 1 and 2, single equipment constitutes and is to change in possible mode, correspondingly also Be Controlled of other parameter under this situation.Particularly, extruder can replace by an emptying pump, and monofilament group's cooling is also had different possible scheme in addition.Equally, an other heating arrangement can be set in stretching device, perhaps replace.
In high speed-spinning technique of today, can also save stretching action by a plurality of draw-off godets.With in this case, long filament both can pull out and be delivered to the bobbin head or directly pulled out by the collecting device of spinning-nozzle from spinning-nozzle by an independent draw-off godet.On the other hand, this stretching action can also pass through other element, and other heating arrangement for example, particularly heating tube replace or replenish.
By the control of pulling control 24, the revolution of draw-off godet 16 and draw-off godet 19.1 and 19.2 just is affected, and the revolution ratio does not change simultaneously.In this case, stretching action remains on the constant, but yarn speed has changed.According to this, just can influence fineness.
By the control of pulling control 23.1 or 23.2, the revolution ratio between the draw-off godet 19.1/19.2/16 just can be controlled (influence), and therefore, stretch ratio has just changed.By the variation of stretch ratio, the intensity of long filament, and also have fineness also can obtain changing.
Also can control the peripheral speed of bobbin 33 at last by mass parameter by axle control, and bobbin 33 is regulated by touch roll 28.Therefore, just can realize special influence, and long filament is by above-mentioned long filament pulling force doff on bobbin to bobbin structure and long filament pulling force.
On the other hand, use the inventive method, the previously described parameter that influences just can be known more reliably than prior art, needs only to measure by test in advance and these influence defective and the characteristic relation of correction parameter of relating to parameters.Can predict especially like this:
-by pump revolution 44, the adjusting of heating arrangement 5; Pollution by nozzle; Cause the variation of fineness by the variation of draw-off godet 16 draw rate;
The defective of-long filament, for example long filament breaks,
The defective of-oil supply (Praparation) (fault of (13) is rolled in the consumption of feeding, oil supply)
The variation of-stretch ratio is for example by polluting or the wearing and tearing of draw-off godet 16,19.1,19.2 cause;
-for example the variation of the strength characteristics that causes of the operation by heating arrangement 53;
The variation of-the winding speed that for example causes by touch roll 28 inhomogeneous operations.
Point out that in the embodiment that has described this quality signal can be by common observation long filament stress and bobbin weight, perhaps long filament stress and the long filament stress that on the another location, records, perhaps long filament stress and back and forth rule obtain.Other parameter is:
The protuberance that bobbin is distolateral, it can predict by optics or pneumatic scanning; Noise forms and noise analysis; And bobbin weight.
In Fig. 2, described an embodiment, wherein, stipulated the long filament pulling force as other parameter, as it two tractive draw-off godets 19.1 and 19.2 measure.For this reason, between two draw-off godets, settle a long filament tension measurement device 8.This long filament tension measurement device detects the long filament pulling force at the long filament of drawing zone and shaping area operation.This long filament pulling force determines by draw-off godet 19.1 and 19.2 speed on the one hand, but heat effect that in addition can be by the heating arrangement 53 in draw-off godet 19.1 and definite by other factor.Yet in this long filament pulling force, do not relate to long filament pulling force fluctuation, this fluctuation be because reel and the long filament that back and forth causes and be present in after the draw-off godet 19.2 in service.Long filament pulling force by long filament pulling force sensor 68 detects, and very adds the reality that exist man-hour near long filament on the one hand, and on the other hand for further processing, that is the work of particularly reeling is irrelevant as much as possible.The change curve that this obtains by long filament pulling force sensor 68 and long filament tension measurement device 8, and may after removing back and forth influence, just can in comparing unit 66, do mutually relatively.When this comparison, just can determine time relationship of critical curve or the like.People can determine that the curve that is offset is inclined to.Can determine in a district or special incident in another district.According to all these, just can obtain quality output (signal), they have special judgment for the quality of method operation and product.
Ref. No.
1. long filament
2. filler device
3. extruder
4. motor
5. heating arrangement
6. fusant pipeline
7. pressure sizer
8. long filament pulling force (stress) measuring appliance
9. pump
10. spinneret
11. spinning-nozzle
12. monofilament (strand)
13. finish roll
14. cooling cylinder
15. blowning installation
16. tractive draw-off godet
17. lead around rolling
18. drive (draw-off godet) motor
19. tractive draw-off godet
20. lead around rolling
21. drive motor
22. frequency sender
23. frequency sender, stretch ratio control
24. tractive control
25. top yarn guide
26. reciprocal triangle
27. reciprocating apparatus
28. touch roll
30. ferromagnetic inserts
31. pulse transmitter
33. bobbin
34. axle
35. bobbin sleeve pipe
36. drive (shaft coupling) motor
37. shaft coupling control device
38. ferromagnetic inserts
39. pulse transmitter
42. comparator circuit
44. pump motor
45. pump control
46. computing unit
48. long filament stress issue device
49. extruder (motor) control
50. add heat control
51. cooling control
52. add heat control
53. draw-off godet heating
54. logic-block structure
55. rectangle
56. reciprocating motor
57. reciprocal control device
58. comparing unit
59. comparing unit
60. ratings transmitter
61. structural detail filters (ripple) device
62. reservoir
63. reservoir
64. filter (ripple) device
65. multiplication block structure
66. comparison means
67. computing unit
68. long filament tension measurement device
Claims (9)
1. method of judging defective in the production routine of synthetic filaments, this method comprises the steps:
Finish production routine, comprising: with continuous synthetic filaments along the operation passage advance and with this winding filament that is just advancing on bobbin;
Monitor first parameter, this first parameter depends on production routine or bobbin and produces one first output signal, this first output signal is the function of monitored first parameter, and wherein, first parameter comprises the propelling of this long filament that is just advancing along with it, the stress that is recorded on predicted position;
Monitoring at least the second parameter, this second parameter depend on production routine or bobbin and produce one second output signal, and this second output signal is the function of monitored second parameter;
Produce indicator signal; When first output signal and at least the second output signal are determined a state of representing defective, just produce an indicator signal.
2. in accordance with the method for claim 1, it is characterized in that, the step that produces described indicator signal comprises: first and second output signals simultaneously relatively or by the mutual relationship of time relatively and when departing from a fiducial value from normal value, just produce indicator signal.
3. in accordance with the method for claim 2, it is characterized in that described normal value is to be determined by a defect model that is stored in the reservoir.
4. in accordance with the method for claim 1, it is characterized in that the step of described generation indicator signal comprises, first output signal and second output signal are connected each other, and when above-mentioned first and second output signals that connect each other when normal value departs from, produce indicator signal.
5. in accordance with the method for claim 4, it is characterized in that described normal value is to be determined by the defect model that is stored in the reservoir.
6. in accordance with the method for claim 1, it is characterized in that, the step of described generation indicator signal comprises: the critical curve of determining each first and second signal, compare these two critical curves, and when the curve that is compared is consistent simultaneously or by the mutual relationship of time, produce indicator signal.
7. in accordance with the method for claim 1, it is characterized in that described second parameter comprises the propelling of the above-mentioned long filament that is just advancing along with it, the stress that on predicted position, is recorded.
8. judge the method for defective in the production routine of synthetic filaments, this method comprises the steps:
-finish production routine, comprise: continuous synthetic filaments is held together to form a yarn that is just advancing along the propelling of operation passage with this synthetic filaments collection that is just advancing, with the above-mentioned reel for yarn that is just advancing on bobbin, and in the anterior program of coiling step, the above-mentioned yarn that is just advancing is contacted with draw-off godet
Monitor the yarn stress of above-mentioned draw-off godet upstream, and produce one first output signal, it is the function of monitored upstream yarn stress,
Monitor the yarn stress in above-mentioned draw-off godet downstream, and produce one second output signal, it is the function of the yarn stress in monitored draw-off godet downstream, and
When first output signal and second output signal demonstrate a kind of defect state, produce an indicator signal.
9. judge the method for defective in the production routine of synthetic filaments, this method comprises the steps:
-finish production routine, comprising: the extruding of thermoplastic material, to form many continuous synthetic filaments, along operation passage advancing filament, the material of above-mentioned propelling flocked together constitutes a yarn that is just advancing, and with the above-mentioned reel for yarn that is just advancing on bobbin
Monitor first parameter of the above-mentioned yarn that is just advancing, described first parameter depends on production routine or bobbin, and produces one first output signal, and it is a function of monitored first parameter,
Monitor second parameter of the above-mentioned yarn that is just advancing, described second parameter depends on production routine or bobbin, and produces one second output signal, and it is a function of monitored second parameter, and
When first output signal and at least the second output signal demonstrate a kind of defect state, produce an indicator signal, wherein
The step of finishing production routine also comprises, the described yarn that is just advancing is contacted with draw-off godet, and described first parameter comprise the yarn stress of described draw-off godet upstream and the yarn stress that described second parameter comprises the draw-off godet downstream.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4314049 | 1993-04-29 | ||
| DEP4314049.1 | 1993-04-29 | ||
| DE4320424 | 1993-06-21 | ||
| DEP4320424.4 | 1993-06-21 | ||
| DE4325632 | 1993-07-30 | ||
| DEP4325632.5 | 1993-07-30 | ||
| DE4329213 | 1993-08-31 | ||
| DEP4329213.5 | 1993-08-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1108459A CN1108459A (en) | 1995-09-13 |
| CN1047000C true CN1047000C (en) | 1999-12-01 |
Family
ID=27435731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94190241.2A Expired - Fee Related CN1047000C (en) | 1993-04-29 | 1994-04-26 | Method of diagnosing faults in a synthetic-yarn manufacturing process |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN1047000C (en) |
| DE (1) | DE4492654B4 (en) |
| IT (1) | IT1269604B (en) |
| WO (1) | WO1994025869A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE59611441D1 (en) * | 1995-06-30 | 2007-09-20 | Oerlikon Textile Gmbh & Co Kg | Method for controlling the thread tension |
| DE19911704A1 (en) * | 1998-04-01 | 1999-10-07 | Barmag Barmer Maschf | Quality control for production of wound bobbins of melt spun filaments |
| DE10015564C1 (en) * | 2000-03-29 | 2001-10-11 | Dienes Appbau Gmbh | Regulating, control and energy supply device, used for spinning machines has electrical regulating, controlling and energy supplying devices, and functional modules arranged on module |
| DE10125480B4 (en) * | 2001-05-25 | 2006-05-11 | Georg Sahm Gmbh & Co. Kg | Method and apparatus for producing a multifilament yarn from a thermoplastic polymer |
| TWI346849B (en) | 2003-12-05 | 2011-08-11 | Saurer Gmbh & Co Kg | Method and apparatus for order control in a production process for a fibre product |
| EP1771371B1 (en) * | 2004-07-31 | 2014-09-24 | Oerlikon Textile GmbH & Co. KG | Method and device for controlling the quality during the production of an extruded polymer product |
| DE102006035251A1 (en) * | 2006-07-26 | 2008-01-31 | Vienco Gmbh | Method and arrangement for determining the yarn quality and / or package quality of a running thread on the basis of laser Doppler anemometry |
| CN103060973A (en) * | 2012-12-26 | 2013-04-24 | 苏州昭人纺织有限公司 | Wire breaking alarming device for textile machine |
| DE102016119866A1 (en) * | 2016-10-18 | 2018-04-19 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Method and plant for producing a fleece of fibers |
| DE102018109816B3 (en) * | 2018-04-24 | 2019-10-24 | Yxlon International Gmbh | A method for obtaining at least one significant feature in a series of components of the same type and method for classifying a component of such a series |
| DE102018006531A1 (en) * | 2018-08-17 | 2020-02-20 | Oerlikon Textile Gmbh & Co. Kg | Process for monitoring a melt spinning process and melt spinning device |
| CN109884066A (en) * | 2019-01-22 | 2019-06-14 | 江苏恒力化纤股份有限公司 | A kind of method of offline inspection long filament silk volume greasy dirt fault |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA942870A (en) * | 1970-08-29 | 1974-02-26 | Tsutomu Tamura | Apparatus for detecting yarn quality information |
| DE3005746C2 (en) * | 1980-02-15 | 1983-10-06 | Ernest Scragg & Sons Ltd., Macclesfield, Cheshire | Device for the continuous monitoring of a large number of threads in a textile machine |
| CN1027926C (en) * | 1985-07-03 | 1995-03-15 | 巴马格巴默机器制造股份公司 | Continuous monitoring method for running yarns |
| US4888945A (en) * | 1987-04-03 | 1989-12-26 | Murata Kikai Kabushiki Kaisha | Method for quality control of textured yarn |
| GB9010862D0 (en) * | 1990-05-15 | 1990-07-04 | Rieter Scragg Ltd | Yarn quality grading method |
-
1994
- 1994-04-26 CN CN94190241.2A patent/CN1047000C/en not_active Expired - Fee Related
- 1994-04-26 WO PCT/EP1994/001316 patent/WO1994025869A1/en active Application Filing
- 1994-04-26 DE DE4492654A patent/DE4492654B4/en not_active Expired - Fee Related
- 1994-04-29 IT ITMI940835A patent/IT1269604B/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| WO1994025869A1 (en) | 1994-11-10 |
| ITMI940835A0 (en) | 1994-04-29 |
| DE4492654B4 (en) | 2004-10-21 |
| IT1269604B (en) | 1997-04-08 |
| ITMI940835A1 (en) | 1995-10-29 |
| CN1108459A (en) | 1995-09-13 |
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