EP0867550A1 - Verfahren und Vorrichtung zur Herstellung eines mechanisch zusammengepressten Vliesstoffs - Google Patents

Verfahren und Vorrichtung zur Herstellung eines mechanisch zusammengepressten Vliesstoffs Download PDF

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Publication number
EP0867550A1
EP0867550A1 EP97830146A EP97830146A EP0867550A1 EP 0867550 A1 EP0867550 A1 EP 0867550A1 EP 97830146 A EP97830146 A EP 97830146A EP 97830146 A EP97830146 A EP 97830146A EP 0867550 A1 EP0867550 A1 EP 0867550A1
Authority
EP
European Patent Office
Prior art keywords
rollers
web
conveyor belt
compacting rollers
compacting
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.)
Withdrawn
Application number
EP97830146A
Other languages
English (en)
French (fr)
Inventor
Giovanni Bacchio
Renato Angelo Lualdi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fonderie Officine Riunite Ing Graziano Di L Graziano & C Sas
Comerio Ercole SpA
Original Assignee
Fonderie Officine Riunite Ing Graziano Di L Graziano & C Sas
Comerio Ercole SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fonderie Officine Riunite Ing Graziano Di L Graziano & C Sas, Comerio Ercole SpA filed Critical Fonderie Officine Riunite Ing Graziano Di L Graziano & C Sas
Priority to EP97830146A priority Critical patent/EP0867550A1/de
Publication of EP0867550A1 publication Critical patent/EP0867550A1/de
Withdrawn legal-status Critical Current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
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
    • D06C15/02—Calendering, pressing, ironing, glossing or glazing textile fabrics between co-operating press or calender rolls
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving

Definitions

  • the present invention relates to a method and to apparatus for producing mechanically compacted non-woven fabric. More precisely, the invention relates to systems for producing non-woven fabric in which a web of non-compacted fibres is subjected to a thermal compaction step by being passed through a calender having at least one pair of contrarotating, heated compacting rollers.
  • the method of producing non-woven fabric by thermal compaction provides, in a first step, for the formation of a web of non-compacted fibres, for example, by means of carding machines.
  • This web may be formed from short or medium fibres or from continuous thread.
  • the web of non-compacted fibres has very poor or even non-existent dimensional stability and has to be supported during its supply to the compacting rollers. These rollers are heated to a temperature close or equal to the softening point of the fibres being processed.
  • the compacting rollers are also pressed against one another along a generatrix of contact by a pressure which is variable according to the type of fibres being processed. Heat sealing takes place as a result of the passage through the compacting rollers, binding the fibres together and mechanically stabilizing the web.
  • FIG. 1 of the appended drawings shows schematically the stage in which the compacting of the web of fibres takes place in conventional apparatus.
  • a pair of contrarotating, heated compacting rollers is indicated 2, the axes of rotation of the rollers being contained in a vertical plane.
  • a web 4 of non-compacted fibres is supplied to the compacting rollers 2 by means of a conveyor belt 6.
  • the output portion of the conveyor belt is placed as close as possible to the point of contact of the compacting rollers 2.
  • the main disadvantage of known apparatus of the type described above consists of the fact that the calendering step imposes quite strict limits on production speed.
  • the limitations on the maximum calendering speed of the web are due essentially to the lack of mechanical stability of the portion of the web which extends from the point of detachment from the conveyor belt to the point of entry between the compacting rollers.
  • the problems of dimensional stability of the web are aggravated by the heat which comes from the lower compacting roller and which falls on the unsupported portion of web.
  • the object of the present invention is to provide a method and apparatus for producing non-woven fabric which overcome the aforementioned problems.
  • this object is achieved by a method and apparatus having the characteristics forming the subject of the claims.
  • the present invention proposes a different arrangement of the conveyor belt and of the calender which carries out the thermal compaction of the web of fibres.
  • the compacting rollers of the calender are arranged with their axes of rotation contained in a plane which is arranged at an angle to the vertical and the output portion of the conveyor belt is situated above the compacting rollers.
  • the web of non-compacted fibres is thus supplied to the compacting rollers by a downward movement from above in an oblique or vertical direction.
  • the web of non-compacted fibres is thus subjected by gravity to a force in the direction of advance rather than to a force perpendicular to the web.
  • the compacting rollers are preferably arranged in a manner such that their axes of rotation are contained within a substantially horizontal plane.
  • a pair of conveyor rollers is disposed between the output portion of the conveyor belt and the compacting rollers.
  • Figure 2 shows schematically the portion of apparatus for producing non-woven fabric in which the compaction of a web of non-woven fibres, indicated 10, takes place.
  • the web 10 is prepared by known machinery, for example, carding machines, which deposit the web of non-compacted fibres 10 on a conveyor belt 12.
  • a calender Beneath the conveyor belt 12 there is a calender, generally indicated 14, comprising a pair of contrarotating compacting rollers 16.
  • the outer surfaces of the rollers 16 are heated to a temperature close to the softening point of the fibres.
  • the axes of rotation 18 of the compacting rollers 16 are contained in a plane which is arranged at an angle to the vertical.
  • the plane containing the axes of rotation 18 is parallel to the floor surface 20 and is thus arranged at 90° to the vertical.
  • the plane containing the axes 18 could be arranged differently, provided that it is arranged at an angle to a vertical plane.
  • the rollers 16 are urged against one another with a contact pressure which is variable according to the type of fibres being processed.
  • the output portion 22 of the conveyor belt 12 is arranged above the compacting rollers 16.
  • the web 10 of non-compacted fibres comes off the conveyor belt 12 at the point indicated 24 and is supplied between the rollers 16 vertically downwardly from above.
  • a compacted web of non-woven fabric, indicated 26, emerges downstream of the rollers 16.
  • the portion 10a of the web of non-compacted fibres which extends from the conveyor belt 12 to the compacting rollers 16 is subjected to a gravitational force which acts in the direction of advance of the web. This prevents the problems due to the lack of dimensional stability of the web in the space in which it is not supported by the conveyor belt 12.
  • the output portion 22 of the conveyor belt 12 is displaced horizontally from the vertical plane passing through the contact line between the compacting rollers 16.
  • the portion 10a of the web 10 therefore extends obliquely rather than vertically.
  • the relative positions of the conveyor 12 and of the calender 14 are preferably adjustable both vertically and horizontally, as indicated schematically by the arrows A and B of Figure 2a, in order to adapt the path of the portion of web 10a to the speed and the characteristics of the web.
  • FIGS 3, 3a,and 3b show further variants of the apparatus according to the present invention; elements identical to those described above are indicated by the same reference numerals.
  • a pair of motor-driven conveyor rollers 28 is disposed between the conveyor belt 12 and the compacting rollers 16 and collects the web of non-compacted fibres which is supplied downwardly from above by the conveyor belt 12.
  • the conveyor rollers 28 have the purpose of supplying the web of non-compacted fibres 10 to the compacting rollers 16.
  • the axes of rotation of the conveyor rollers 28 are preferably contained in a plane parallel to the plane containing the axes of rotation 18 of the compacting rollers 16.
  • the conveyor rollers 28 may be cold and, in this case, also act as a heat shield above the heated compacting rollers 16, preventing excessive softening of the portion 10a of the web 10.
  • the conveyor rollers 28 may be heated in order to carry out preliminary compaction of the web.
  • the vertical plane tangential to the conveyor cylinders 28 substantially coincides with the vertical plane tangential to the compacting rollers 16.
  • the vertical plane tangential to the compacting rollers 28 may be spaced horizontally from the vertical plane tangential to the compacting rollers 16.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
EP97830146A 1997-03-26 1997-03-26 Verfahren und Vorrichtung zur Herstellung eines mechanisch zusammengepressten Vliesstoffs Withdrawn EP0867550A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97830146A EP0867550A1 (de) 1997-03-26 1997-03-26 Verfahren und Vorrichtung zur Herstellung eines mechanisch zusammengepressten Vliesstoffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97830146A EP0867550A1 (de) 1997-03-26 1997-03-26 Verfahren und Vorrichtung zur Herstellung eines mechanisch zusammengepressten Vliesstoffs

Publications (1)

Publication Number Publication Date
EP0867550A1 true EP0867550A1 (de) 1998-09-30

Family

ID=8230602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97830146A Withdrawn EP0867550A1 (de) 1997-03-26 1997-03-26 Verfahren und Vorrichtung zur Herstellung eines mechanisch zusammengepressten Vliesstoffs

Country Status (1)

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EP (1) EP0867550A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006048437A2 (de) * 2004-11-05 2006-05-11 Concert Gmbh Walzenanordnung für die vlies-produktion
CN100545335C (zh) * 2004-11-05 2009-09-30 康瑟特有限公司 用于生产纤维网的辊布置
DE102010000602A1 (de) * 2010-03-02 2011-09-08 Andritz Küsters Gmbh Thermobonding-Kalander
EP3246446A4 (de) * 2015-01-13 2018-08-01 Seiko Epson Corporation Blattmaterialherstellungsvorrichtung und blattmaterialherstellungsverfahren

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4091161A (en) * 1975-03-11 1978-05-23 Cefilac Non-woven webs and method for the dry production thereof
US4096016A (en) * 1969-01-25 1978-06-20 Gerhard Pohl Process for making and using high frequency weldable material
GB2241968A (en) * 1990-03-15 1991-09-18 Hunt And Moscrop Limited Calender arrangement
US5298097A (en) * 1992-03-31 1994-03-29 Neuberger S.P.A. Apparatus and method for thermally bonding a textile web

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096016A (en) * 1969-01-25 1978-06-20 Gerhard Pohl Process for making and using high frequency weldable material
US4091161A (en) * 1975-03-11 1978-05-23 Cefilac Non-woven webs and method for the dry production thereof
GB2241968A (en) * 1990-03-15 1991-09-18 Hunt And Moscrop Limited Calender arrangement
US5298097A (en) * 1992-03-31 1994-03-29 Neuberger S.P.A. Apparatus and method for thermally bonding a textile web

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006048437A2 (de) * 2004-11-05 2006-05-11 Concert Gmbh Walzenanordnung für die vlies-produktion
WO2006048437A3 (de) * 2004-11-05 2006-09-21 Concert Gmbh Walzenanordnung für die vlies-produktion
JP2008518864A (ja) * 2004-11-05 2008-06-05 コンサート ゲゼルシャフト ミット ベシュレンクテル ハフツング フリース製造のためのローラアッセンブリ
CN100545335C (zh) * 2004-11-05 2009-09-30 康瑟特有限公司 用于生产纤维网的辊布置
US7690093B2 (en) 2004-11-05 2010-04-06 Concert Gmbh Roller arrangement for producing fleece
DE102010000602A1 (de) * 2010-03-02 2011-09-08 Andritz Küsters Gmbh Thermobonding-Kalander
DE102010000602B4 (de) * 2010-03-02 2016-07-07 Andritz Küsters Gmbh Thermobonding-Kalander
EP3246446A4 (de) * 2015-01-13 2018-08-01 Seiko Epson Corporation Blattmaterialherstellungsvorrichtung und blattmaterialherstellungsverfahren
US10704198B2 (en) 2015-01-13 2020-07-07 Seiko Epson Corporation Sheet manufacturing apparatus and sheet manufacturing method

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