EP3688217B1 - Vorrichtung und verfahren zum schrumpfen von gewebe - Google Patents
Vorrichtung und verfahren zum schrumpfen von gewebe Download PDFInfo
- Publication number
- EP3688217B1 EP3688217B1 EP18786868.2A EP18786868A EP3688217B1 EP 3688217 B1 EP3688217 B1 EP 3688217B1 EP 18786868 A EP18786868 A EP 18786868A EP 3688217 B1 EP3688217 B1 EP 3688217B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shrinking
- cylinder
- cavity
- fabric
- station
- 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.)
- Active
Links
- 239000004744 fabric Substances 0.000 title claims description 55
- 238000000034 method Methods 0.000 title claims description 12
- 230000000979 retarding effect Effects 0.000 claims description 33
- 238000007664 blowing Methods 0.000 claims description 7
- 230000008016 vaporization Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000835 fiber Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C21/00—Shrinking by compressing
Definitions
- the present invention relates to an apparatus and a method for shrinking knitted fabrics in a flat or tubular form.
- wires are not dimensionally stable, as they are made of fibers, for example natural fibers, which are deformable both in the longitudinal and in the transverse direction. Water and soap act as lubricants between the wires which, regaining a partial relative mobility, tend to shorten back to their original length. This results in a narrowing of the fabric up to a dimensional equilibrium of the fibers, which causes considerable problems during the various stages of processing of tissues and of the finished garments.
- the patent US 4882819 discloses for example a shrinking device of fabrics comprising a shrinking station having a feeding cylinder and a counter-rotating retarding cylinder and arranged consecutively in a working direction.
- the retarding cylinder rotates at an angular speed lower than that of the feeding cylinder.
- two opposing blade profiles are arranged that define a cavity of calibrated thickness passage in correspondence of which the tissue in contact with the feeding cylinder is deflected and passes in contact with the retarding cylinder. Since the retarding cylinder rotates at a lower speed than that of the feeding cylinder, in the transition zone defined by the profiles the fabric is forced to slow down, undergoing progressively, and throughout its width, to a shrinking in the forward direction.
- the fabric is arranged with warp yarns aligned in the forward direction, so that in the area of passage from the feeding cylinder to the retarding cylinder the shrinking takes place by making closer the weft threads.
- the fabric is previously subjected to a treatment with steam, which is supplied upstream of the feeding cylinder in a vaporizing station.
- the technical problem addressed and solved by the present invention is therefore that of providing a shrinking apparatus which allows to overcome the aforementioned drawbacks with reference to the prior art.
- the shrinking apparatus according to the invention has a structure similar to that described in the above mentioned US patent US4882819 as regards to the use of a shrinking station comprising a feeding cylinder and a retarding cylinder arranged in succession and rotating at angular speeds one greater than the other.
- the shrinking apparatus according to the invention differs from that described in the US patent US4882819 in that the air is insufflated in countercurrent on the two faces of the fabric in transit in the cavity between the feeding cylinder and the retarding cylinder.
- the air may be heated and/or moistened in order to facilitate shrinking of the fabric. Thanks to this feature, the presence of a vaporizing station which precedes the shrinking station in the forward direction of the fabric is not strictly necessary, and this fact offers the advantage of a structural simplification of the shrinking apparatus.
- the shrinking station comprises a pair of parallel guide surfaces which are arranged in the feeding direction of the fabric and are made of a low friction coefficient material, such as for example PTFE.
- the guide surfaces have respective openings or seats through which the feeding cylinder and the retarding cylinder face each other, and are movable one in respect to each other transversely according to the thickness of the fabric F to be treated.
- a shrinking apparatus is generally indicated by the reference number 100 and is shown schematically in a two-dimensional reference system in which a longitudinal direction L represents the forward direction along which a fabric F to be treated proceeds through it, and a vertical direction V, perpendicular to the longitudinal direction L, represents the direction along which the force of gravity acts.
- the apparatus 100 comprises, according to the prior art, a loading station 110 from which a fabric F is fed from a container, a trolley or similar, to an inlet 111 where it is received through a set of rollers 112, 113 which have the function of tensioning it and stretching it in the direction of its height.
- the loading station 110 may advantageously comprise a spreading assembly (not shown), such as for example that described in the European patent EP 1127184 B1 in the name of the Applicant.
- the apparatus 100 may also include according to the prior art a vaporizing station 120, set downstream the loading station 110 in the longitudinal direction L, in which steam is dispensed on the opposite faces of the fabric F in transit.
- the vaporizing station 120 may for example comprise a pair of boxes 121, 122 each provided with one or more delivery openings facing the feeding path of the fabric F.
- the steam has the function of moistening and lubricating the textile fibers favoring their relaxation before the subsequent compacting phase.
- the shrinking station 130 comprises, according to the prior art, a feeding cylinder 131 having the function of driving the fabric F to be treated at a nominal speed, which may be set through a control system (not shown) of the apparatus 100, and a retarding cylinder 132 appropriately spaced from the feeding cylinder 131 in the longitudinal direction L, driven by the control system at an angular speed lower than that of the feeding cylinder 131.
- Both the feeding cylinder 131 and the retarding cylinder 132 are provided with a roughened, textured mantle or covered with a material with a high friction coefficient, suitable to prevent slipping of the fabric F to be shrunk.
- this configuration is such that in the cavity or area of passage from the feeding cylinder 131 to the retarding cylinder 132, the fabric F slows down, making closer its weft threads, i.e. its shrinking in the longitudinal direction L.
- the feeding cylinder 131 and the retarding cylinder 132 may, for example, be counter-rotating, as in the illustrated embodiment, intended to come into contact with opposite faces of the fabric F to be compacted.
- the feeding cylinder 131 and the retarding cylinder 132 may be advantageously equipped with heating elements, for example electric resistors, or they may be heated from inside by insufflating steam or diatermic oil, thus contributing to the relaxation of fibers of the fabric F according to the teachings of the prior art.
- heating elements for example electric resistors, or they may be heated from inside by insufflating steam or diatermic oil, thus contributing to the relaxation of fibers of the fabric F according to the teachings of the prior art.
- the shrinking station 130 comprises blowing means in fluid communication with a cavity C or area of passage of the fabric F between the feeding cylinder 131 and the retarding cylinder 132.
- the blowing means for example one or more fans (not shown), are connected to the cavity of passage of the fabric through one or more channels that terminate in the vicinity of the feeding cylinder 131 and of the retarding cylinder 132, for example therebetween or downstream the latter with respect to the longitudinal direction L.
- the air is insufflated in countercurrent with respect to the forward direction of advancement of the fabric F.
- Air may be heated and/or moistened in order to facilitate shrinking of fabrics. Thanks to this feature, the presence of the vaporizing station 120 is not strictly necessary, which offers the advantage of a structural simplification of the shrinking apparatus.
- the shrinking station 130 comprises a pair of guide surfaces 133, 134, parallel to each other, which develop in the longitudinal direction L and are polished and/or made of a low friction coefficient material, such as PTFE.
- the guide surfaces 133, 134 have respective openings or seats through which face the feeding cylinder 131 and the retarding cylinder 132.
- the gap between the fabric F is therefore defined by the guide surfaces 133, 134.
- the guide surfaces 133, 134 are movable relative to each other in the vertical direction V, for example by means of respective linear actuators or equivalent means.
- the distance between the guide surfaces 133, 134 is set through the automatic control system of the apparatus 100 according to the thickness of the fabric F to be treated, and is for example variable between 0 and 3 mm, thus allowing the transit of the fabric F spread with a minimum gap.
- the channels for supplying countercurrent air are advantageously obtained or reported in the guide surfaces 133, 134.
- the channels are for example two, indicated respectively by the reference numbers 135, 136, and are obtained for example downstream the retarding cylinder 132 in the longitudinal direction L each in one of the guide surfaces 133, 134, thus allowing air to act on both sides of the fabric F.
- the arrows in Figure 3 schematically show a condition of operation of the shrinking station 130.
- the angle of incidence of the channels 135, 136 is for example 45°, but it will be understood that this angle is not a limiting feature of the invention.
- This embodiment of the invention allows the transit of the fabric F to be compacted from the feeding cylinder 131 to the retarding cylinder 132 without recurring to the use of guide profiles such as for example the shrinking apparatus described in the above-mentioned US patent US4882819 , which offers the advantage of a considerable structural simplification and consequent reduction of costs for realizing the apparatus 100.
- the use of a low friction coefficient material for the guide surfaces 133, 134 also favors the mobility of the weft yarns of the fabric F, effectively contributing to its shrinking process.
- Pressure, flow rate, temperature, humidity degree of air supply are parameters that may be set through the control system of the apparatus 100.
- the supply pressure may be between 1 bar and 5 bar
- the temperature may be comprised between 20°C and 250°C depending on the characteristics of the fabric F
- the moisture content may vary from 5% up to 60% always in function of the characteristics of the fabric F.
- the fabric F exiting from the shrinking station 130 is received in a collection station (not shown), where it is rolled up or folded according to subsequent processing or simply prepared for storage.
- the collection station may be a folding device of the type described in the Italian patent application 102017000082267 in the name of the Applicant.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
Claims (9)
- Eine Vorrichtung (100) zum Schrumpfen von Geweben in Längsrichtung, wobei die besagte Vorrichtung (100) eine Schrumpfstation (130) aufweist mit einer Zuführwalze (131) und einer Verzögerungswalze (132), ferner weist sie ein Gebläse auf, welches in einer Strömungsverbindung mit einem Hohlraum (C) für die Aufnahme eines Gewebe (F) steht, das von der besagten Zuführwalze (131) zu der besagten Verzögerungswalze (132) gezogen wird, wobei das besagte Gebläse mit dem besagten Hohlraum (C) über einen oder mehrere Kanäle (135, 136) in Strömungsverbindung steht, welche derart angeordnet sind, um in Richtung der Zuführwalze (131) und der Verzögerungswalze (132) zu blasen, dadurch gekennzeichnet, dass die Zuführwalze (131) und die Verzögerungswalze (132) hintereinander angeordnet sind und in einer Längsrichtung (L) voneinander beabstandet sind, sowie dadurch, dass die Schrumpfstation (130) ferner ein Paar von parallelen Führungsplatten (133, 134) aufweist, die sich in der Längsrichtung (L) erstrecken und auf diese Weise zwischen sich den besagten Hohlraum (C) definieren, und die entsprechende Aufnahmen aufweisen, durch welche die besagte Zuführwalze (131) und die besagte Verzögerungswalze (132) in den Hohlraum (C) hineinragen, wobei die besagten ein oder mehreren Kanäle (135, 136) in den besagten Führungsplatten (133, 134) eingeformt oder angeordnet sind, und wobei das besagte Gebläse an den Hohlraum (C) für den Durchgang des Gewebes (F) angeschlossen ist, um Luft in den besagten Hohlraum (C) im Gegenstrom bezüglich der Zuführrichtung des Gewebes (F) zu blasen.
- Die Vorrichtung (100) gemäß Anspruch 1, wobei die Führungsplatten (133, 134) aus PTFE bestehen.
- Die Vorrichtung (100) gemäß Anspruch 1 oder 2, wobei die Führungsplatten (133, 134) in einer vertikalen Richtung (V) rechtwinklig zu der Längsrichtung (L) relativ zueinander beweglich sind.
- Die Vorrichtung (100) gemäß einem der Ansprüche 1 bis 3, wobei die Zuführwalze (131) und die Verzögerungswalze (132) mit Heizelementen versehen sind.
- Die Vorrichtung (100) gemäß einem der Ansprüche 1 bis 4, ferner umfassend eine Dehnungseinrichtung, die zwischen einer Aufnahmestation (110) der Vorrichtung und der Schrumpfstation (130) angeordnet ist.
- Die Vorrichtung (100) gemäß einem der Ansprüche 1 bis 5, ferner umfassend eine Dampfstation (120), die zwischen einer Aufnahmestation (110) der Vorrichtung und der Schrumpfstation (130) angeordnet ist.
- Ein Verfahren zum Schrumpfen von Geweben in Längsrichtung, wobei ein Gewebe (F) einer Schrumpfvorrichtung zugeführt wird, umfassend eine Schrumpfstation (130), die mit einer Zuführwalze (131) und einer Verzögerungswalze (132) versehen ist, welche in einer Zuführrichtung hintereinander angeordnet sind und in einer Längsrichtung (L) voneinander beabstandet sind, wobei das besagte Verfahren folgende Schritte umfasst:i) Ausstatten der besagten Schrumpfstation (130) mit einem Gebläse, das sich in Strömungsverbindung mit einem Hohlraum (C) befindet, der dazu vorgesehen ist, das Gewebe (F) aufzunehmen, das von der besagten Zuführwalze (131) zu der besagten Verzögerungswalze (132) gezogen wird;ii) Ausstatten der besagten Schrumpfstation (130) mit einem Paar von parallelen Führungsplatten (133, 134), die sich in der Längsrichtung (L) erstrecken und auf diese Weise zwischen sich den besagten Hohlraum (C) definieren, und die entsprechende Aufnahmen aufweisen, durch welche die besagte Zuführwalze (131) und die besagte Verzögerungswalze (132) in den Hohlraum (C) hineinragen, und wobei die besagten ein oder mehreren Kanäle (135, 136) in den besagten Führungsplatten (133, 134) eingeformt oder angeordnet sind; undiii) Einblasen von Luft in den besagten Hohlraum (C) im Gegenstrom bezüglich der Zuführrichtung des Gewebes (F).
- Das Schrumpfverfahren gemäß Anspruch 7, wobei die Luft, die in den Hohlraum (C) eingeblasen wird, erhitzt und/oder befeuchtet wird.
- Das Schrumpfverfahren gemäß Anspruch 8, wobei die Luft, die in den Hohlraum (C) eingeblasen wird, eine Temperatur zwischen 20°C und 250°C aufweist sowie einen Feuchtigkeitsgehalt zwischen 5% und 60%.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT102017000108694A IT201700108694A1 (it) | 2017-09-28 | 2017-09-28 | Apparato e metodo di compattazione per tessuti |
PCT/IB2018/057355 WO2019064159A1 (en) | 2017-09-28 | 2018-09-24 | APPARATUS AND METHOD FOR TISSUE RETRACTION |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3688217A1 EP3688217A1 (de) | 2020-08-05 |
EP3688217B1 true EP3688217B1 (de) | 2022-08-17 |
Family
ID=61187627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18786868.2A Active EP3688217B1 (de) | 2017-09-28 | 2018-09-24 | Vorrichtung und verfahren zum schrumpfen von gewebe |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP3688217B1 (de) |
KR (1) | KR102517140B1 (de) |
CN (1) | CN111465730A (de) |
BR (1) | BR112020006251A2 (de) |
IT (1) | IT201700108694A1 (de) |
WO (1) | WO2019064159A1 (de) |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH439199A (de) * | 1964-07-18 | 1967-07-15 | Beckers Gustav | Vorrichtung zum kontinuierlichen Stauchen flacher Warenbahnen |
US3431608A (en) * | 1965-07-17 | 1969-03-11 | Monforts Mas Fab A | Apparatus for compacting fibrous webs |
US3448499A (en) * | 1965-11-18 | 1969-06-10 | Pasolds Ltd | Method of and apparatus for compressively shrinking fabric |
SU711210A1 (ru) * | 1978-01-06 | 1980-01-25 | Ивановский научно-исследовательский экспериментально-конструкторский машиностроительный институт | Устройство дл усадки ткани в машинах отделочного производства |
US4882819A (en) * | 1987-10-13 | 1989-11-28 | Compax Corp. | Method for compressively shrinking of tubular knitted fabrics and the like |
CA1300864C (en) * | 1987-10-13 | 1992-05-19 | William D. Milligan | Method and apparatus for compressive shrinkage of tubular knitted fabric and the like |
US5678288A (en) * | 1993-02-22 | 1997-10-21 | Richard R. Walton | Compressively treating flexible sheet materials |
EP1657340A1 (de) * | 2004-11-15 | 2006-05-17 | Sperotto Rimar S.R.L. | Vorrichtung und Verfahren zum Krumpfen von Textilsubstraten |
KR101021856B1 (ko) * | 2010-08-09 | 2011-03-17 | 이남윤 | 직물 수축가공장치 |
WO2015132757A1 (en) * | 2014-03-05 | 2015-09-11 | Biancalani S.R.L. | Method and machine for treating textile fabrics with an adjustable air flow |
-
2017
- 2017-09-28 IT IT102017000108694A patent/IT201700108694A1/it unknown
-
2018
- 2018-09-24 EP EP18786868.2A patent/EP3688217B1/de active Active
- 2018-09-24 WO PCT/IB2018/057355 patent/WO2019064159A1/en unknown
- 2018-09-24 BR BR112020006251-0A patent/BR112020006251A2/pt not_active Application Discontinuation
- 2018-09-24 KR KR1020207012391A patent/KR102517140B1/ko active IP Right Grant
- 2018-09-24 CN CN201880063406.0A patent/CN111465730A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
BR112020006251A2 (pt) | 2020-10-06 |
KR102517140B1 (ko) | 2023-03-31 |
EP3688217A1 (de) | 2020-08-05 |
IT201700108694A1 (it) | 2019-03-28 |
KR20200077524A (ko) | 2020-06-30 |
WO2019064159A1 (en) | 2019-04-04 |
CN111465730A (zh) | 2020-07-28 |
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