EP0481175A1 - Barrette à aiguilles pour machine textile - Google Patents

Barrette à aiguilles pour machine textile Download PDF

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Publication number
EP0481175A1
EP0481175A1 EP91112178A EP91112178A EP0481175A1 EP 0481175 A1 EP0481175 A1 EP 0481175A1 EP 91112178 A EP91112178 A EP 91112178A EP 91112178 A EP91112178 A EP 91112178A EP 0481175 A1 EP0481175 A1 EP 0481175A1
Authority
EP
European Patent Office
Prior art keywords
needles
foot part
needle bar
plastic
recesses
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Withdrawn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
EP91112178A
Other languages
German (de)
English (en)
Inventor
Josef Egerer
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.)
Staedtler and Uhl KG
Original Assignee
Staedtler and Uhl KG
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 Staedtler and Uhl KG filed Critical Staedtler and Uhl KG
Publication of EP0481175A1 publication Critical patent/EP0481175A1/fr
Withdrawn legal-status Critical Current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
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/30—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls
    • D01H4/32—Arrangements for separating slivers into fibres; Orienting or straightening fibres, e.g. using guide-rolls using opening rollers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/10—Construction, mounting, or operating features of combing elements
    • D01G19/105—Combing cylinders

Definitions

  • Needle bar with a plastic foot part and a series of needles inserted into the foot part, in particular for open-end spinning machines, combing machines and intersecting machines.
  • Such needle bars have been used for decades in different embodiments for textile machines.
  • the needle bars each carry a series of needles so that the needles can be used together in the respective textile machine.
  • the DD-PS 18 045 describes flat needles, for example, which are inserted into a metal needle bar, have a widened foot part and are prevented from falling down by a spring steel sheet.
  • DE-OS 1 760 205 also describes a solution in which the needles are designed as flat needles, have lateral approaches in the foot area and can be inserted into a corresponding profile groove at the foot of the needle bar by means of these approaches.
  • GB-PS 1 117 445 describes a needle bar in which the needles are aligned by means of a plastic strip provided with holes in such a way that the foot parts of the needles protrude downwards, these foot parts then subsequently being introduced into a metal U-rail and poured there will.
  • the plastic strip therefore has no holding function, but is only used for alignment. It is not possible to exchange individual needles.
  • DE-AS 1 510 432 describes a needle bar with cylindrical bores for receiving a cylindrical shaft part of the needles with a press fit and a groove running longitudinally in the foot region of the needles, the foot part of the needle bar receiving the needles being made of metal. If wear occurs on individual needles, these can also be replaced individually by knocking them out with the aid of a mandrel. In practice, this solution is not successful because the holes are expanded after a few changes at the latest. A tight fit is then no longer guaranteed. It should be noted in particular that the needles have diameter tolerances due to the manufacturing process, so that, for. B. The replacement of an oversize needle with an undersize needle necessarily leads to a loose fit.
  • solutions are also known in which the needles are soldered into a foot part or fastened there with adhesives. Both solutions do not allow the individual replacement of individual needles, and the use of adhesives and the associated solvents is also problematic from an environmental point of view. When soldering, the associated heating leads to the needle bar body becoming increasingly soft and thus having a limited service life.
  • the object of the invention is to design a needle bar of the type mentioned at the outset in such a way that even individual needles can be replaced quickly and easily in the event of their damage, although a reliable, tight fit regardless of possible even after several exchange operations Manufacturing tolerances should be guaranteed.
  • the plastic foot part is provided with a plurality of receptacles corresponding to the cross section of the needles, but having undersize in comparison, and in that the needles are individually inserted from below through the recesses, a widened foot part of the needles comes to rest on the inner edge of the recesses in the plastic foot part.
  • needles can be inserted or exchanged individually with little effort and a high holding force. Due to the inherent elasticity of the plastic and the undersize of the bores, manufacturing-related diameter tolerances of the needles are compensated for, so that a tight fit is achieved even during the initial garnishing. In particular, the plastic due to its elasticity also ensures that the recesses through the needles, in particular through Needles with manufacturing-related oversize are not permanently expanded, so that a subsequently inserted needle, which may have undersize, is nevertheless securely fixed. The needles cannot emerge in the direction of the radial outside, because they rest against the inner edge of the recesses with a stop shoulder. The needles are radially inward through the respective carrier of the needle bar, for. B. through the main body of an open end spinning reel, also securely fixed.
  • the recesses of the needle bar have an undersize of approximately 2/100 mm.
  • the undersize covers the entire practically occurring, manufacturing-related tolerance range in the needle diameter. It is hereby achieved that even needles with the smallest diameter can be reliably fastened within the tolerance range.
  • a plastic that has sufficient elasticity with sufficient resilience is z.
  • the stop shoulder on the needles can be formed in that the needles have a widened, round foot part and are embossed flat in the work area, or conversely the needles are essentially round in cross section and have a flat embossed, widened foot part.
  • the plastic foot part has a longitudinal groove in the region of the lower end of the needles such that the outer edges of the plastic foot part are substantially flush with the inner, lower needles.
  • the needles are then fixed without play when the needle bar is inserted into a carrying body.
  • a needle bar designed according to the invention in an opening roller for open-end spinning machines, as is described in detail in EP-PS 0 178 614, ie. H. the plastic foot part is fixed with a slight helical twist.
  • the configuration of the plastic foot part according to the invention in particular also with a longitudinal groove on the underside, opening up a particularly favorable fixing possibility in such an opening roller.
  • An opening roller 1 shown in detail in FIG. 1 is described in more detail in EP-PS 0 178 614. It comprises a plurality of dovetail-shaped grooves 2 which are curved parallel to one another and slightly helically at a distance from one another with respect to the axis of rotation of the opening roller 1.
  • the central axis 3 of each groove 2 is inclined against the radial direction 4 by an angle which in the exemplary embodiment, for. B. is 12 °.
  • the needles 7 have a round, inner, lower end 8, whereas the work area 9 is embossed flat, so that in the area of the transition from the round end 8 to the embossed work area 9, a stop shoulder 10 is formed, which prevents the needles from moving radially Direction outwards (arrow 11) can detach from the foot section 6.
  • the support body that is to say in the exemplary embodiment through the bottom 12 of the groove 2, also prevents the needles 7 from escaping downward, so that they are reliably fixed.
  • the plastic foot part 6 has a groove 13 made from its underside, the height of which corresponds approximately to the height of the lower ends 8 of the needles 7. Accordingly, the needles 7 can be inserted from below by means of recesses 15 of the plastic foot part 6 which are rectangular in cross section, until the stop shoulder 10 formed by the embossing of the working area 9 bears against the lower edge 16 of the recesses 15.
  • the working area of the needles can also be round and for a stop shoulder 10 to be formed by embossing the lower end 8. Accordingly, of course, the recesses 15 must then have a round cross section, which in turn also has an undersize in the order of magnitude mentioned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Knitting Machines (AREA)
EP91112178A 1990-10-19 1991-07-20 Barrette à aiguilles pour machine textile Withdrawn EP0481175A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19904033263 DE4033263A1 (de) 1990-10-19 1990-10-19 Nadelstab fuer textilmaschinen
DE4033263 1990-10-19

Publications (1)

Publication Number Publication Date
EP0481175A1 true EP0481175A1 (fr) 1992-04-22

Family

ID=6416648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91112178A Withdrawn EP0481175A1 (fr) 1990-10-19 1991-07-20 Barrette à aiguilles pour machine textile

Country Status (3)

Country Link
EP (1) EP0481175A1 (fr)
CS (1) CS316291A3 (fr)
DE (1) DE4033263A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2323099A (en) * 1997-03-15 1998-09-16 Stewart & Sons Wm R Making pinned devices for fibre treatment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19631809A1 (de) * 1996-08-07 1998-02-12 Gerald Koinzer Nadelbelag

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1117445A (en) * 1964-07-01 1968-06-19 Matthew Kenneth Mann Improvements in or relating to faller bars and other comb-like members
DE1510432A1 (de) * 1965-05-31 1970-10-01 Stewart & Sons Wm R Faservorbereitungsmaschine
DE1760205A1 (de) * 1967-04-21 1972-07-27 Schlumberger Cie N Kamm oder Nadelstab fuer Textilmaschinen
EP0018472A2 (fr) * 1979-04-24 1980-11-12 Staedtler & Uhl Dispositif pour la fixation de barrettes d'aiguilles sur le porte-aiguilles de machines textiles.
EP0178614A2 (fr) * 1984-10-18 1986-04-23 Staedtler & Uhl Cylindres peigneurs pour machine de filature à bout libre

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB967802A (en) * 1962-03-09 1964-08-26 Akroyd And Son Ltd S Improvements in or relating to faller bars for textile combing machines
DE1685607A1 (de) * 1967-09-09 1971-07-08 Staedtler & Uhl Tragstreifen fuer Nadeln,z.B.Kammnadeln
CH505919A (de) * 1969-01-31 1971-04-15 Chr Burckhardt Fa Nadelwalze
DE3146006A1 (de) * 1981-11-20 1983-06-01 Staedtler & Uhl, 8540 Schwabach Nadel fuer textilmaschinen und vorrichtung und verfahren zu ihrer herstellung
CH666916A5 (de) * 1985-07-06 1988-08-31 Braecker Ag Aufloesewalze fuer offen-end-spinnmaschinen.
DE3824911A1 (de) * 1988-07-22 1990-02-01 Reiners & Fuerst Nadelgarnitur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1117445A (en) * 1964-07-01 1968-06-19 Matthew Kenneth Mann Improvements in or relating to faller bars and other comb-like members
DE1510432A1 (de) * 1965-05-31 1970-10-01 Stewart & Sons Wm R Faservorbereitungsmaschine
DE1760205A1 (de) * 1967-04-21 1972-07-27 Schlumberger Cie N Kamm oder Nadelstab fuer Textilmaschinen
EP0018472A2 (fr) * 1979-04-24 1980-11-12 Staedtler & Uhl Dispositif pour la fixation de barrettes d'aiguilles sur le porte-aiguilles de machines textiles.
EP0178614A2 (fr) * 1984-10-18 1986-04-23 Staedtler & Uhl Cylindres peigneurs pour machine de filature à bout libre

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2323099A (en) * 1997-03-15 1998-09-16 Stewart & Sons Wm R Making pinned devices for fibre treatment
GB2323099B (en) * 1997-03-15 2001-07-04 Stewart & Sons Wm R Fibre processing apparatus

Also Published As

Publication number Publication date
CS316291A3 (en) 1992-05-13
DE4033263A1 (de) 1992-04-23

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