EP3763859A1 - Faserstreckvorrichtung für roving-rahmen - Google Patents

Faserstreckvorrichtung für roving-rahmen Download PDF

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Publication number
EP3763859A1
EP3763859A1 EP20184269.7A EP20184269A EP3763859A1 EP 3763859 A1 EP3763859 A1 EP 3763859A1 EP 20184269 A EP20184269 A EP 20184269A EP 3763859 A1 EP3763859 A1 EP 3763859A1
Authority
EP
European Patent Office
Prior art keywords
motorized
bags
cylinder
support
fibers
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.)
Pending
Application number
EP20184269.7A
Other languages
English (en)
French (fr)
Inventor
Juan Rovira Trias
Ester Rovira Latorre
Mireia Rovira Campdelacreu
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP3763859A1 publication Critical patent/EP3763859A1/de
Pending legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons

Definitions

  • This invention finds application in the textile industry, and more particularly, in the manufacturing of fiber stretching devices or gears for roving frames.
  • the conventional fiber stretching device for roving frames comprises: at least first and second motorized cylinders, fixedly placed in parallel and which practically reach the full length of the roving frame; and a plurality of pressing arms perpendicular to the motorized cylinders, distributed along the roving frame, and provided with freely rotating rollers placed in parallel to said motorized cylinders.
  • This stretching device comprises: a static track placed in parallel to the second motorized cylinder, and a plurality of closed belts, which we shall call “lower bags", which embrace closely the static track and the mentioned second motorized cylinder.
  • the pressing arms have: freely rotating first rollers and second rollers, placed in parallel and on top of the motorized cylinders, for pressing the fibers to stretch.
  • the second rollers of the pressing arms comprise some closed belts we call “upper bags”, which embrace the corresponding second roller and means for support and tension.
  • the known stretching devices have means for regulating the inclination of the upper bags, and, consequently, varying the extension of its contact surface with the lower bags actioned by the second motorized cylinder.
  • Said lower bags are distributed along the roving frame, defining a support surface for each one of the lines of fibers to stretch, which circulate above the motorized cylinders in a perpendicular direction to said motorized cylinders.
  • This stretching system has regulating means for the individual adjustment of the tension of the lower bags.
  • a first problem identified with these lower bags is that, the adjustment of these regulating means happens to be particularly difficult and complex, taking into account: on one hand, the high number of lower bags existent in a roving frame of approximately 40m in length, and, on the other hand, that the tension of each lower bag must be sufficiently high so that all the lower bags be jointly dragged by the second motorized cylinder; however such tension should not reach a too high value to avoid that the resistance to the drag by the ensemble of lower bags provokes an excessive twisting and/or irreversible harm in said second motorized cylinder.
  • the second motorized cylinder in charge of their actioning can be submitted to a twist of about 12 to 15 degrees between both ends of the same.
  • a second problem with this stretching system is the complexity involved in, and the high stop time of the roving frame necessary for, replacing said lower bags in case of wear or break, as this operation requires disassembling the second motorized cylinder and the static track along its full length, which is practically the full length of the roving frame, in order to remove the lower bags to be substituted and the subsequent assembly of the new lower bags, from one of the ends of the second motorized cylinder.
  • the applicant of the invention is not aware of any background art which would permit resolving in a satisfactory manner the identified problem related to the lower bags of the roving frame.
  • the fiber stretching device for roving frames object of this invention is of the afore-hand mentioned type and comprises constructional details aimed at resolving in a satisfactory manner the identified problems of the lower bags and their replacement in case of break or wear.
  • the solution proposed in the present invention refers to the elimination of the mentioned lower bags and of certain related elements such as: the static plaque which is embraced by said lower bags together with the second motorized cylinder, and the means for regulating the tension of said lower bags; such that the upper bags press directly the fibers to stretch against the second motorized cylinder, specifically against some support zones defined in said second motorized cylinder.
  • the current problems identified in the roving frames due to the lower bags in the stretching device or gears are resolved by eliminating the mentioned lower bags.
  • the second motorized cylinder disposes at least in the support zones of the fibers to stretch and of the upper bags, a larger diameter than the rest of said second cylinder. This increase in diameter of the second motorized cylinder enables the upper bags not to establish a too closed curve in the contact zone with said second motorized cylinder.
  • This stretching device has interchangeable stops, of different heights, couplable to the support means the upper bags on top of fixed stops, near the contact zones of the upper bags with said second cylinder.
  • the upper bags have a different inclination with respect to their corresponding freely rotating roller, contacting said upper bags with support zones of larger or smaller size of the second motorized cylinder.
  • the zones defined in the second motorized cylinder for the support of the fibers to stretch present a diameter equal to or larger than 40 millimeters, and considerably larger than the diameter of the motorized cylinders used presently in the stretching devices for roving frames, which generally are comprised between 25 and 30 millimeters.
  • this stretching device comprises, at least, two first motorized cylinders and a second motorized cylinder for the support of the fibers to stretch, said second motorized cylinder being placed in an intermediate position between said first motorized cylinders.
  • the fiber stretching device for roving frames is applicable in roving frames (M), as the one schematically represented in figure 1 , being said stretching device responsible for preparing the fibers, stretching them, aligning them, and thinning them before they are twisted and rolled up over different spindles.
  • the stretching device comprises: two first cylinders (1) and a second cylinder (2), all of them motorized, disposed in parallel and fixed to the frame of the roving frame (M) in fixed positions; and a plurality of pressing arms (3), visible in figure 1 , disposed in perpendicular to the motorized cylinders (1, 2) and provided of first rollers (31) and second freely rotating rollers (32), and of upper bags (4) which embrace the corresponding freely rotating second roller (32) and support means (41) of said upper bags (4).
  • the pressing arms (3) can be disposed in this operative position, as represented, for example, in figures 3 and 5 , or in a lifted and inoperative position as represented in figure 4 .
  • the upper bags (4) press the fibers to stretch (F) directly against support zones (21) defined in the motorized second cylinder (2), lacking said stretching device lower bags for the support of the upper bags (4).
  • the second motorized cylinder (2) presents in the support zones (21) of the fibers to stretch (F) and of the upper bags (4) a larger diameter than the rest of said second cylinder (2).
  • This property permits defining in the second motorized cylinder (2) adequate zones for the support and the pressing of the fibers to stretch (F) by the upper bags (4).
  • this device comprises interchangeable stops (42), of differing heights, configured to couple to the support means (41) of the upper bags (4).
  • said upper bags (4) contact with the second motorized cylinder (2) in support zones (21), of larger to smaller size, causing a larger or smaller retention and consequently a larger or smaller stretching of the fibers (F).
  • the diameter of the second motorized cylinder (2), at least in the support zones of the fibers to stretch, is equal or larger than 40 millimeters, thereby reducing the curve formed by the upper bags (4), in the support zones (21), with said second motorized cylinder (2).
  • the device comprises two first motorized cylinders (1) and a second motorized cylinder (2) for supporting the fibers to stretch (F), being said second motorized cylinder (2) disposed in an intermediate position between the said first motorized cylinders (1).
  • this stretching device comprises in the passage zone of the fibers, concretely in-between the first motorized cylinders (1) and the second motorized cylinder (2), guides (6) for the lateral grouping of the fibers to stretch and their guiding in the forward direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Nonwoven Fabrics (AREA)
EP20184269.7A 2019-07-10 2020-07-06 Faserstreckvorrichtung für roving-rahmen Pending EP3763859A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201931182U ES1234294Y (es) 2019-07-10 2019-07-10 Dispositivo de estiraje de fibras para mecheras

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
ES201931182U Previously-Filed-Application 2019-07-10

Publications (1)

Publication Number Publication Date
EP3763859A1 true EP3763859A1 (de) 2021-01-13

Family

ID=67774810

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20184269.7A Pending EP3763859A1 (de) 2019-07-10 2020-07-06 Faserstreckvorrichtung für roving-rahmen

Country Status (2)

Country Link
EP (1) EP3763859A1 (de)
ES (1) ES1234294Y (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943397C (de) * 1952-09-11 1956-05-17 Zinser Textilmaschinen Gmbh Riemchen-Streckwerk
US2751631A (en) * 1951-02-28 1956-06-26 Textile drafting apparatus
US2951266A (en) * 1956-01-30 1960-09-06 Saco Lowell Shops Drafting mechanism
DE974060C (de) * 1952-11-08 1960-09-08 Weller Maschf Heinz Oberriemchen-Streckwerk
EP0350797A1 (de) * 1988-07-15 1990-01-17 Maschinenfabrik Rieter Ag Streckwerk für Spinnmaschinen
DE102008009230A1 (de) * 2008-02-04 2009-08-06 Wilhelm Stahlecker Gmbh Führungsriemchen für Doppelriemchenstreckwerke und Doppelriemchenstreckwerk
CH711154A1 (de) * 2015-06-01 2016-12-15 Rieter Ag Maschf Variabler Käfig für ein Druckwalzenpaar eines Streckwerks.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2751631A (en) * 1951-02-28 1956-06-26 Textile drafting apparatus
DE943397C (de) * 1952-09-11 1956-05-17 Zinser Textilmaschinen Gmbh Riemchen-Streckwerk
DE974060C (de) * 1952-11-08 1960-09-08 Weller Maschf Heinz Oberriemchen-Streckwerk
US2951266A (en) * 1956-01-30 1960-09-06 Saco Lowell Shops Drafting mechanism
EP0350797A1 (de) * 1988-07-15 1990-01-17 Maschinenfabrik Rieter Ag Streckwerk für Spinnmaschinen
DE102008009230A1 (de) * 2008-02-04 2009-08-06 Wilhelm Stahlecker Gmbh Führungsriemchen für Doppelriemchenstreckwerke und Doppelriemchenstreckwerk
CH711154A1 (de) * 2015-06-01 2016-12-15 Rieter Ag Maschf Variabler Käfig für ein Druckwalzenpaar eines Streckwerks.

Also Published As

Publication number Publication date
ES1234294Y (es) 2019-12-03
ES1234294U (es) 2019-09-05

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