EP0943719A1 - Vorrichtung zum Abdichten von unter Über- oder Unterdruck stehenden Maschinen - Google Patents

Vorrichtung zum Abdichten von unter Über- oder Unterdruck stehenden Maschinen Download PDF

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Publication number
EP0943719A1
EP0943719A1 EP99104807A EP99104807A EP0943719A1 EP 0943719 A1 EP0943719 A1 EP 0943719A1 EP 99104807 A EP99104807 A EP 99104807A EP 99104807 A EP99104807 A EP 99104807A EP 0943719 A1 EP0943719 A1 EP 0943719A1
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EP
European Patent Office
Prior art keywords
flanges
rollers
cylinders
contact
machine
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
Application number
EP99104807A
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English (en)
French (fr)
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EP0943719B1 (de
Inventor
Roberto Franchetti
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Individual
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Individual
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Publication date
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Publication of EP0943719A1 publication Critical patent/EP0943719A1/de
Application granted granted Critical
Publication of EP0943719B1 publication Critical patent/EP0943719B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
    • D06B23/00—Component parts, details, or accessories of apparatus or machines, specially adapted for the treating of textile materials, not restricted to a particular kind of apparatus, provided for in groups D06B1/00 - D06B21/00
    • D06B23/14—Containers, e.g. vats
    • D06B23/16—Containers, e.g. vats with means for introducing or removing textile materials without modifying container pressure

Definitions

  • This invention concerns a device to ensure hold on machines functioning under pressure or depression, as set forth in the main claim.
  • the invention concerns a holding device applied both at inlet to and at outlet from machines, apparatus or other equipment defining at least a volume wherein a condition of pressure or depression is created with respect to the ambient pressure.
  • the invention is applied preferentially, but not exclusively, to machines or apparatus used in the textile field.
  • the devices to ensure that the autoclaves are sealed at inlet and at outlet substantially comprise the same pairs of cylinders which also act as drawing elements for the fabric.
  • At least one of the two cylinders is lined with a layer of elastomer so that, since it is subjected to crushing, the contact with the other cylinder does not take place along a line, but over an extended area, thus ensuring the transverse hold, intended in the direction of advance of the fabric.
  • the main difficulty of all the systems known to the state of the art is to achieve an efficient lateral hold on the drawing cylinders.
  • the state of the art also includes US-A-4,111,434, which, in one of its embodiments, provides holding flanges located in contact with the heads of the drawing cylinders and intermediate rollers, which have a lesser diameter than that of the drawing cylinders, arranged in tangential contact with the drawing cylinders in order to achieve the hold.
  • the purpose of the invention is to achieve a holding device to be applied in a machine suitable to work under pressure/depression, which will be configured so as to ensure a holding action both transverse and lateral and extremely efficient under all operating conditions of the machine.
  • the holding device is achieved in such a way as to maintain its characteristics substantially unchanged in the course of time, even when there is progressive wear in the parts in reciprocal contact, and even when there are plays and gaps deriving from mechanical stresses and thermal expansion.
  • the device according to the invention comprises a pair of rollers made of hard material which are parallel and superimposed, arranged between the drawing cylinder or cylinders and the inlet to the machine.
  • rollers are positioned transverse with respect to the direction of advance of the fabric and are in tangential contact against the surface of at least one of the drawing cylinders.
  • the rollers have an axial length which is greater than the axial length of the corresponding drawing cylinder.
  • the drawing cylinders cooperate, in correspondence with their heads, with plate elements located in contact both with the heads of the cylinders and also with a portion of the lateral surface of the two rollers.
  • rollers When they are longer than the drawing cylinders, the rollers protrude laterally from the respective plate elements and are accommodated in suitable seatings made on the plate elements which partly or completely occupy the circumferential development of the rollers.
  • the seatings have a suitable thickness and adequate characteristics of mechanical tolerance so as to ensure a reliable and long-lasting hold.
  • auxiliary holding elements or pads, between the rollers and the front, fixed part of the machine, which are contained longitudinally between the plate elements so that their ends are always in contact with the plate elements.
  • rollers There may be a pad for every roller, or one single pad may be associated with both rollers.
  • the length of the auxiliary elements, in a transverse direction to the advance of the fabric can be varied and modified so as to adapt to the specific requirements which occur when the machine is being used under conditions of pressure/depression and to ensure optimum holding conditions always.
  • the auxiliary elements allow to compensate and to recover in every operating situation the plays between the parts in reciprocal contact (cylinders, plate elements and rollers) which are created when the machine is working, both due to thermal expansion and also due to the progressive wear which derives from the functioning of the machine and in particular from the reciprocal rubbing of the parts in contact.
  • the device ensures a complete hold, both longitudinal and lateral, reliable and long-lasting.
  • the fabric 1 is engaged between two drawing cylinders 2' and 2'', advantageously lined with elastomer material, arranged parallel to each other and reciprocally crushed against each other.
  • the cylinders 2', 2'' are suitable to insert and extract the fabric 1 into/from an operating machine 3, which is not described in any detail here, and which operates under pressure or depression.
  • the holding device denoted in its entirety by the reference number 4 in Fig. 1, is installed between the two cylinders 2', 2'' and the inlet of the fabric 1 into the machine 3.
  • the holding device 4 comprises two lateral flanges 5', 5'' arranged in sliding contact with at least part of the heads of the cylinders 2', 2'', two rollers 6', 6'', made of metal, hard resin or other similar hard material, arranged transverse and tangent for the entire length to the surface of the cylinders 2' and 2'', and an intermediate block 7, anchored to the front system of the machine 3.
  • the lateral flanges 5' and 5'' are advantageously made of a material which is highly resistant to wear and the applied loads, and with a low friction coefficient.
  • the materials used for preference are polymer materials with a PTFE (polytetrafluorethylene) base, for example Valflon® or similar materials.
  • the intermediate block 7 has an aperture 20 in a substantially central position, which allows the fabric 1 to enter the machine 3.
  • the two lateral flanges 5' and 5'' are maintained in constant elastic thrust against the heads of the cylinders 2' and 2'' due to the action of adjustable elastic elements 8, of a known type.
  • the contact surface between the cylinders 2' and 2'' and the flanges 5' and 5'' is defined, in this case, by raised edges 9', 9'', advantageously consisting of rings made of hard rubber or other material with the same mechanical/physical properties, made on or protruding from the lateral walls of the respective cylinders 2', 2''.
  • the two rollers 6', 6'' are longer than the corresponding cylinders 2', 2'', with which they are in reciprocal tangential contact on the length, and protrude laterally from the flanges 5' and 5'' thanks to appropriate holes or seatings made at a suitable position thereon.
  • the pads 10 are positioned in longitudinal sliding contact with the surface of the rollers 6' and 6'' and are housed inside suitable shaped seatings made on the intermediate body 7 (Fig. 9).
  • the upper surface of the pads 10 is curved, specifically concave, so as to adhere perfectly with at least part of the surface of the rollers 6' and 6''.
  • the pads 10 are made of a material with high characteristics of resistance to wear and the loads applied, and a low friction coefficient, for example Valflon® or similar material.
  • the pads 10 are held in lateral contact with the relative flanges 5 and are suitable to modify their length according to the elastic stresses imparted to them by the thrust of the elastic means 8 which act in constant compression against the flanges 5' and 5'' themselves.
  • the pads 10 are able to modify their length so as to ensure constant lateral contact against the flanges 5' and 5'' and therefore a constant hold.
  • the pads 10 are made in at least two parts, reciprocally sliding with respect to each other, and, in this case, comprise two lateral parts 13 and a central body 110.
  • the lateral parts 13 can be anchored, for example, glued, nailed, screwed or otherwise, to the respective flanges 5' and 5'', and are able to slide lengthwise with respect to the central body 110.
  • the reciprocal sliding serves to lengthen or shorten the pad 10 when the flanges 5' and 5'' are respectively distanced or brought near, due to the thrust of the elastic means 8, indicated by the number 24 in Fig. 11, in order to recover the play or gaps which are created when the machine 3 is working.
  • the end parts 13 are connected to the central body 110 by means of elastic means 14 which guarantee a constant position and that the elastic thrust to bring the parts reciprocally together is maintained.
  • the reference number 22, in Figs 10 and 13, denotes the zone of sliding contact between the rollers 6' and 6'' and the respective pads 10.
  • This area 22 is distributed longitudinally astride the separation zone between the end parts 13 and the central body 110, which ensures that the hold is maintained even when there is the separation zone.
  • Fig. 7 provides that the pad 10 is made in a single piece and has elastic packings 14 at the ends suitable to be compressed or dilated so as to allow the pad 10 to shorten or, respectively, lengthen if it is subjected to an elastic stress by the flanges 5' and 5''.
  • the elastic packing 14 is arranged in a substantially central position on the length of the pad 10.
  • the pad 10 is in a single piece and cooperates, at the ends, with elastic inserts 23 inserted in a mating position in the body of the flanges 5' and 5''.
  • the inclusion of the elastic inserts 23 allows the ends of the pad 10 to penetrate inside the body of the flange 5 when the said flange is thrust inwards by the elastic means 8 in order to recover plays or gaps, for example when the edges 9 of the cylinders 2' and 2'' are worn.
  • Fig. 3 provides only one cylinder 2 on which the two rollers 6', 6'' are in tangent contact.
  • Fig. 4 shows a different conformation of the flange 5, where the area of sliding contact of the flange 5 with the heads of the rollers 6', 6'' extends for the entire circumference thereof.
  • the pads 10 are located partly below and partly behind the relative roller 6' and 6'' and surround a substantial part of the arc of the rollers 6' and 6'' facing towards the machine 3.
  • the pads 10 inserted into the relative positioning seating made on the intermediate block 7 are supported at the rear by an elastic base 17 which ensures the appropriate compression force against the relative roller 6' and 6''.
  • the lateral flanges 5 inside the body of the flanges 5 and in a substantially central position, the lateral flanges 5 include portions 12 made of elastic material, preferably vulcanised rubber, which give a certain elasticity to the body of the flange and thus allow a better sliding adherence of the flanges 5 to the heads of the rollers 6', 6'', even in the case that the rollers 6' and 6'' are partly misaligned.
  • Figs. 12 and 13 show a variant of the invention, in diagram form, from the side and from the front, wherein there is only one pad 10 for both the rollers 6' and 6''.
  • the pad 10 comprises a central body 110 and two reciprocally sliding lateral parts 13' and 13'' (of which only one is visible); elastic connection elements 14 are interposed between the two parts.
  • the two lateral parts 13' and 13'' can be attached to the relative flanges 5.
  • the central body 110 of the pad 10 has a central aperture 21 through which the fabric 1 passes.
  • the elastic packing 11 does not need to be included.
  • the lateral walls of the seating 15 are advantageously lined with rubberised material and at least one wall 16 is movable and/or adjustable so that it is possible to vary the pressure in the zone of reciprocal sliding of the said parts (Fig. 9).
  • the hold is ensured by the inclusion of the elastic base 17, preferably made of rubber or consisting of an air chamber with adjustable pressure.
  • intermediate block 7 instead of being anchored to the structure of the machine 3, is a single piece therewith.
  • the rubberised cylinders and the rollers are supported by means suitable to adjust both their position and also the value of the force of reciprocal compression between the cylinder and roller; these components, either driven or idle, may also be cooled or heated by the circulation of liquid inside.
  • the pads 10 and possibly the rollers 6', 6'', PTFE (polytetrafluorethylene) based products are used, or similar products which offer not only a minimum friction coefficient and reasonable elasticity, but also considerable mechanical resistance even at high temperatures, up to 280°C.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Float Valves (AREA)
  • External Artificial Organs (AREA)
  • Motor Or Generator Frames (AREA)
  • Invalid Beds And Related Equipment (AREA)
EP99104807A 1998-03-16 1999-03-11 Vorrichtung zum Abdichten von unter Über- oder Unterdruck stehenden Maschinen Expired - Lifetime EP0943719B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT98VI000053A ITVI980053A1 (it) 1998-03-16 1998-03-16 Dispositivo di tenuta da installare in entrata e/o in uscita su appare cchi funzionanti in regime di pressione o depressione
ITVI980053 1998-03-16

Publications (2)

Publication Number Publication Date
EP0943719A1 true EP0943719A1 (de) 1999-09-22
EP0943719B1 EP0943719B1 (de) 2003-05-21

Family

ID=11426632

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99104807A Expired - Lifetime EP0943719B1 (de) 1998-03-16 1999-03-11 Vorrichtung zum Abdichten von unter Über- oder Unterdruck stehenden Maschinen

Country Status (5)

Country Link
EP (1) EP0943719B1 (de)
AT (1) ATE241028T1 (de)
DE (1) DE69908003T2 (de)
ES (1) ES2198808T3 (de)
IT (1) ITVI980053A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762646A3 (de) * 2005-09-13 2008-08-27 SUPERBA (Société par Actions Simplifiée) Dichtungsvorrichtung für Maschinen zur Wärmebehandlung von Garnen
EP2065501A1 (de) * 2007-11-29 2009-06-03 LAFER SpA Maschine zur Behandlung eines Stoffes unter Druck und/oder Unterdruck

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1211421A (en) * 1967-05-11 1970-11-04 Peter Ag Konrad A sealing device for a web of fabric
US3546902A (en) * 1967-08-28 1970-12-15 Sando Iron Works Co Pressure sealing device in a continuous high pressure steaming apparatus
GB1319352A (en) * 1970-05-22 1973-06-06 Sando Iron Works Co Pressure sealing apparatus
US4111434A (en) * 1974-06-10 1978-09-05 Sando Iron Works Co., Ltd. Method of pressure seal simultaneously employing air-balance of a high pressure steamer and an apparatus therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1211421A (en) * 1967-05-11 1970-11-04 Peter Ag Konrad A sealing device for a web of fabric
US3546902A (en) * 1967-08-28 1970-12-15 Sando Iron Works Co Pressure sealing device in a continuous high pressure steaming apparatus
GB1319352A (en) * 1970-05-22 1973-06-06 Sando Iron Works Co Pressure sealing apparatus
US4111434A (en) * 1974-06-10 1978-09-05 Sando Iron Works Co., Ltd. Method of pressure seal simultaneously employing air-balance of a high pressure steamer and an apparatus therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1762646A3 (de) * 2005-09-13 2008-08-27 SUPERBA (Société par Actions Simplifiée) Dichtungsvorrichtung für Maschinen zur Wärmebehandlung von Garnen
EP2065501A1 (de) * 2007-11-29 2009-06-03 LAFER SpA Maschine zur Behandlung eines Stoffes unter Druck und/oder Unterdruck

Also Published As

Publication number Publication date
ITVI980053A1 (it) 1999-09-16
DE69908003T2 (de) 2004-04-01
DE69908003D1 (de) 2003-06-26
ES2198808T3 (es) 2004-02-01
ATE241028T1 (de) 2003-06-15
EP0943719B1 (de) 2003-05-21

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