EP1159472A1 - Verfahren und vorrichtung zur qualitätsüberwachung textiler bänder - Google Patents
Verfahren und vorrichtung zur qualitätsüberwachung textiler bänderInfo
- Publication number
- EP1159472A1 EP1159472A1 EP00904783A EP00904783A EP1159472A1 EP 1159472 A1 EP1159472 A1 EP 1159472A1 EP 00904783 A EP00904783 A EP 00904783A EP 00904783 A EP00904783 A EP 00904783A EP 1159472 A1 EP1159472 A1 EP 1159472A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- limit values
- longitudinal direction
- deviation
- deviations
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000004753 textile Substances 0.000 title claims abstract description 9
- 238000003908 quality control method Methods 0.000 title abstract 2
- 239000000835 fiber Substances 0.000 claims abstract description 9
- 238000009987 spinning Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000007795 chemical reaction product Substances 0.000 description 6
- 241000347389 Serranus cabrilla Species 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 235000015001 Cucumis melo var inodorus Nutrition 0.000 description 1
- 240000002495 Cucumis melo var. inodorus Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007378 ring spinning Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- 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
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G23/00—Feeding fibres to machines; Conveying fibres between machines
- D01G23/06—Arrangements in which a machine or apparatus is regulated in response to changes in the volume or weight of fibres fed, e.g. piano motions
Definitions
- the invention relates to a method for quality monitoring of a band of textile fibers moving in its longitudinal direction.
- a band of textile fibers is to be understood as a fiber composite of fibers that are used for the production of textiles.
- the fibers are loosely joined together and form an approximately cylindrical body that is compressible.
- Such tapes are known to exist at the exit of cards, combers or draw frames and are temporarily stored in cans. Yarn is preferably produced from such tapes.
- Newer spinning processes require further recording of quality characteristics of the belt in order to fine-tune the spinning machine so that yarn production is achieved without interruption.
- EP 0 606 615 discloses a method and a device for on-line quality monitoring in the spinning mill. Thick points in a band can thus be identified, so that an alarm can be triggered or the system can be shut down. For this purpose, the mass of the strip is measured and a signal derived from this measurement is compared with a limit value. This limit value is determined from the mass non-uniformity (CV%) and a limit value factor.
- a disadvantage of the device or method mentioned is that thick spots with a short length are not fully detected and taken into account for an alarm, etc. Furthermore, the thick spots are only taken into account regardless of their length. It is sufficient to recognize a certain deviation of the mass in relation to a predetermined unit of length in order to influence a control process, for example.
- a disadvantage of this device is to be seen in particular in the fact that the length of a deviation of the mass from an average value plays a role for this regulation in that it is present for a certain time and thus influences the current delay ratio during this time.
- the measure of the deviation of the mass and the length or duration of this deviation are added together with regard to the effective influence in the end product.
- the limit values for the deviation in the longitudinal direction are, for example, at intervals of 1 cm and the limit values for the deviation transversely to the longitudinal direction are at intervals of 5% of the average mass of the strip.
- a measure for improving the quality of the strip is derived from the quality features, ie from the events or deviations counted in the different classes.
- One such measure is to issue a warning signal, for example by actuating a warning lamp, stopping production machines which have provoked or have not reduced the deviation, or production machines which should process the strip with the impermissible deviation and finally cleaning the processing machine in question.
- the faulty piece of tape can be removed and analyzed, from which information can be obtained on how to change the settings of affected production machines.
- the classification can also be used to determine whether an error or a deviation deserves further attention and triggers measures or not.
- a prediction of the consequences in subsequent processes can be made. For example, it can be assumed that thread breaks during spinning can be predicted based on certain classifications. In this way, the efficiency in subsequent processing can be estimated.
- FIG. 3 shows a processing stage of the signal according to FIG. 2,
- Fig. 4 shows a classification field for deviations in the band
- Fig. 5 is a schematic representation of an inventive device.
- Fig. 1 shows a section of a band 1 of textile fibers in view, which extends in the longitudinal direction along an axis 2.
- a section 3 with an approximately normal or medium diameter and a section 4 with a different, in particular increased, diameter.
- the mass of band 1 in section 3 reaches values that fluctuate within narrow limits around an average.
- the values of the mass are obviously different, certainly increased here.
- the mass or the cross section can be detected in a manner known per se and with known devices in an electrical field capacitively or in a light beam and converted into an electrical signal.
- FIG. 2 shows, for example, an electrical signal 5 as it could be derived from band 1.
- This also shows a section 6 in which the signal 5 fluctuates around an average value, as represented by a line 8, and a section 7 with values that deviate strongly and persistently from the average value.
- the deviation in section 7 results in values that correspond to a line 9.
- the deviation in section 7 has a length L, which is counted between lines 10 and 11. So that not every deviation is immediately recognized as such and its length is determined, these are only taken into account above a certain threshold, which is determined here by a value as indicated by a line 12. For example, this value corresponds to X% of the mean.
- Lines 10 and 11 lie, for example, at the intersection of line 12 with signal 5.
- FIG. 3 shows, via axes 13 and 14, several limit values for deviations in the mass or cross-section of the strip transverse to the longitudinal direction of the strip, which are indicated by lines 15, 16, 17 and 18 and limit values for the length of the deviations in the longitudinal direction caused by Lines 19, 20, 21, 22 are shown.
- a signal 23 is shown, which for example corresponds to signal 5 from FIG. 2 or is derived by filtering or other treatment.
- Lines 15 to 22 defi- a classification field with fields that are delimited by four lines and correspond to a class.
- a class also indicates a quality characteristic, in which a certain class stands for a deviation with no or harmless consequences and another for serious or alarming consequences that this deviation can have in the production process of a textile product or in the end product.
- the signal transversely to the longitudinal direction of the strip exceeds two limit values corresponding to lines 15, 16 and also exceeds two limit values corresponding to lines 19, 20 in the longitudinal direction.
- the limit values for the deviation in the longitudinal direction typically follow one another at intervals of 1 cm and the limit values for the deviation transversely to the longitudinal direction at intervals of 5% of the average mass of the strip.
- a classification field 24 with limit values for thick places and a classification field 25 with limit values for thin places are related to axes 26, 27, which indicate a measure of the extent of the deviations along and across the longitudinal direction of the belt.
- Such classes can be identified by a combination of letters and numbers.
- Logarithmic values of the length are preferably plotted along the axis and values for the percentage increase in cross sections or the mass of the strip are plotted along the axis 27.
- FIG. 5 shows a device for quality monitoring of a tape, which has a computer 28 which is connected in a manner known per se to an input unit 29 for data on the one hand and an output unit 30 for data on the other hand.
- This computer 28 can be connected on the one hand to a drafting system 31 or on the other hand to a card or a combing machine 32. In both cases it fulfills the same task, is constructed in the same way and is connected to a machine for spinning preparation such as the draw frame, card or comber.
- the drafting system has the actual stretch 33 in a known manner, with an inlet 34 for belts 35 and an outlet 36 for stretched belts 37.
- the route also has a control unit 38 which is connected to the computer 28 via a line 39. Downstream of the line 33 is a measuring element 40 which is connected to the computer 28 via a line 41.
- Known cans 42, which deliver the belts 35, and a can 43, which receives the stretched belt 44, are connected upstream of the line 33.
- a similar structure can be seen in the card 45, which is also shown very schematically here, since it also has a controller 46 which is connected to the computer 28 via a line 47.
- a measuring element 48 for card sliver 50 is also provided, which is connected to the computer 28 via a line 49. It is preferably provided to provide such a device as described above only on the card, the combing machine or on the draw frame, although here the representation combines the card and the drafting system with the computer 28 for the sake of simplicity.
- the mode of operation of the invention is as follows:
- the band 37, 44 at the exit of the draw frame 33 or the band 50 at the exit of the card 45 or a comber is continuously measured in the measuring element 40 or 48 and converted into an electrical or equivalent signal 5.
- the measured values which form the signal 5 and which, for example, scan the tape 1 in small steps, are compared in the computer 28 with a plurality of limit values, as represented by the lines 15 to 22 in FIG. 3, or as they are according to a classification field according to FIG. 4 correspond. It records which limit values are exceeded by the signal or how many successive limit values are exceeded.
- the result of this comparison or this count is assigned to a class according to FIG. 4. Since these processes are repeated at intervals and run in every sampling interval, the results assigned to the classes are also counted in a counter for each class.
- the classification system comprises, for example, 16 thick point classes in the classification field 24 and 16 thin point classes in the classification field 25.
- the results or events assigned to these classes can be different, depending on what they relate to. It is therefore possible to simply enter the number of detected events or deviations in a class and count them.
- the recorded deviations can also be counted and entered per kilometer of yarn or per hour of production.
- the detection per kilometer takes place, for example, on the assumption that the yarn produced from the tape has a delay with a factor of 100. Deviations counted per km of tape length then correspond to the number of deviations to be expected for 100 km of game length. From such considerations, the load on an operator on the spinning machines can also be determined if it is assumed that such errors lead to the shutdown of a spinning station.
- the display of errors or deviations via the classification according to FIG. 3 or 4 also makes it possible to distinguish between disturbing and non-disturbing errors and to specify a boundary between them in the classification field.
- Each user can decide between which classes in Fig. 4 such a limit should run and according to his own criteria.
- Such limits can be statistically secured depending on the number of deviations and can also form discontinuous, unrelated curves. Warnings when entering unsuitable limits can be derived therefrom and output by the computer 28. In this way, quality features are derived from thick and thin places.
- Thick and thin places are not always to be classified as disadvantageous and therefore the same effort for their elimination is not justified in every case.
- thin spots that appear at the exit of a line are very critical, because they are in subsequent process stages not resolved by duplication. Thin spots result in a relatively higher twist of the yarn in a ring spinning machine. Since thin places offer less resistance to twisting, such places are twisted more, which in turn means that such places can then only be distorted with difficulty. In addition to such spots, there are also weak spots in the yarn, which result from the fact that the more twisted parts allow less twisting in their surroundings. Depending on the location of the tape measurement, there are also other classes for undesirable errors.
- a thin point is extended in the subsequent process stages, which is not always the case with a thick point.
- a thin spot of 2 cm in length in the strip after the stretch is extended to approx. 5 m in a medium ring or rotor game. In a simple fabric, for example, this results in 2mm wide disruptive weft strips.
- causes of thick and thin spots can be assigned to specific classes and specific countermeasures can be derived from them.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH39799 | 1999-03-04 | ||
| CH39799 | 1999-03-04 | ||
| PCT/CH2000/000106 WO2000052239A1 (de) | 1999-03-04 | 2000-02-25 | Verfahren und vorrichtung zur qualitätsüberwachung textiler bänder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1159472A1 true EP1159472A1 (de) | 2001-12-05 |
| EP1159472B1 EP1159472B1 (de) | 2004-04-28 |
Family
ID=4186088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00904783A Revoked EP1159472B1 (de) | 1999-03-04 | 2000-02-25 | Verfahren zur qualitätsüberwachung textiler bänder |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6553826B1 (de) |
| EP (1) | EP1159472B1 (de) |
| JP (1) | JP2002538321A (de) |
| CN (1) | CN1214139C (de) |
| DE (1) | DE50006253D1 (de) |
| WO (1) | WO2000052239A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10227676A1 (de) * | 2002-06-20 | 2004-01-08 | Rieter Ingolstadt Spinnereimaschinenbau Ag | Verfahren und Vorrichtung zur Auswertung von Signalen eines Sensors |
| JP2014514225A (ja) * | 2011-03-16 | 2014-06-19 | ウステル・テヒノロジーズ・アクチエンゲゼルシヤフト | 繊維供試品の特徴づけ |
| CN109137168A (zh) * | 2018-10-29 | 2019-01-04 | 沈阳宏大纺织机械有限责任公司 | 一种换筒滑板 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3741054A (en) * | 1971-10-26 | 1973-06-26 | Philadelphia College Of Textil | Material thickness detector |
| DE2303607C3 (de) * | 1972-01-26 | 1975-11-27 | Kurashiki Boseki K.K., Kurashiki, Okayama (Japan) | Verfahren und Vorrichtung zur Bestimmung der Strickbarkeit von Garnen |
| US4037104A (en) * | 1976-04-29 | 1977-07-19 | Nucleonic Data Systems, Inc. | Dual beam X-ray thickness gauge |
| JPS5926528A (ja) * | 1982-08-03 | 1984-02-10 | Hara Shiyokuki Seisakusho:Kk | 混紡練条機及びコ−マ機におけるテンシヨンドラフト自動調整装置 |
| FR2582683B1 (fr) * | 1985-06-03 | 1988-05-27 | Prouvost Sa | Dispositif de detection de la variation d'epaisseur d'une etoffe et son procede d'etalonnage |
| JPH0620981B2 (ja) * | 1988-05-06 | 1994-03-23 | 村田機械株式会社 | 繊維機械における運転制御装置 |
| CH683347A5 (de) * | 1990-06-25 | 1994-02-28 | Rieter Ag Maschf | Steuerung bzw. Regelung einer Faserverarbeitungsanlage. |
| CH685164A5 (de) | 1992-03-05 | 1995-04-13 | Zellweger Uster Ag | Verfahren und Vorrichtung zur Regelung des Verzugs eines Streckwerks. |
| DE4239270A1 (de) * | 1992-11-23 | 1994-05-26 | Siemens Ag | Verfahren zur Stellgliedidentifizierung bei der Querprofil-Regelung einer kontinuierlich erzeugten Materialbahn |
| CH686446A5 (de) | 1993-01-13 | 1996-03-29 | Luwa Ag Zellweger | Verfahren und Vorrichtung zur On-line Qualitaetsueberwachung im Spinnereivorwerk. |
| US5563809A (en) * | 1994-04-06 | 1996-10-08 | Abb Industrial Systems, Inc. | Measurement/control of sheet material using at least one sensor array |
| US5943740A (en) | 1996-04-02 | 1999-08-31 | Rieter Machine Works, Ltd. | Combing machine with an autoleveller drafting arrangement |
| DE19733454A1 (de) * | 1997-08-02 | 1999-02-04 | Voith Sulzer Papiermasch Gmbh | Verfahren und Vorrichtung zur Erkennung und Korretur einer Faserorientierungs-Querprofil-Veränderung |
| WO1999023486A1 (en) * | 1997-10-31 | 1999-05-14 | Kawasaki Steel Corporation | Method and apparatus for ultrasonically detecting flaw on surface of circular cylinder, and method of grinding roll utilizing the same |
-
2000
- 2000-02-25 DE DE50006253T patent/DE50006253D1/de not_active Revoked
- 2000-02-25 EP EP00904783A patent/EP1159472B1/de not_active Revoked
- 2000-02-25 JP JP2000602846A patent/JP2002538321A/ja active Pending
- 2000-02-25 WO PCT/CH2000/000106 patent/WO2000052239A1/de not_active Ceased
- 2000-02-25 US US09/914,722 patent/US6553826B1/en not_active Expired - Fee Related
- 2000-02-25 CN CN00804529.1A patent/CN1214139C/zh not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0052239A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000052239A1 (de) | 2000-09-08 |
| CN1214139C (zh) | 2005-08-10 |
| US6553826B1 (en) | 2003-04-29 |
| JP2002538321A (ja) | 2002-11-12 |
| EP1159472B1 (de) | 2004-04-28 |
| CN1342223A (zh) | 2002-03-27 |
| DE50006253D1 (de) | 2004-06-03 |
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