WO2010028513A1 - Dispositif d’étirage pour un métier à tricoter - Google Patents

Dispositif d’étirage pour un métier à tricoter Download PDF

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Publication number
WO2010028513A1
WO2010028513A1 PCT/CH2009/000264 CH2009000264W WO2010028513A1 WO 2010028513 A1 WO2010028513 A1 WO 2010028513A1 CH 2009000264 W CH2009000264 W CH 2009000264W WO 2010028513 A1 WO2010028513 A1 WO 2010028513A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing plate
drafting system
knitting machine
drafting
cylinder
Prior art date
Application number
PCT/CH2009/000264
Other languages
German (de)
English (en)
Inventor
Hans Stahlecker
Original Assignee
Rotorcraft Ag
Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh
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 Rotorcraft Ag, Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh filed Critical Rotorcraft Ag
Publication of WO2010028513A1 publication Critical patent/WO2010028513A1/fr

Links

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
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • 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
    • D01H5/56—Supports for drafting elements
    • 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
    • D01H5/60—Arrangements maintaining drafting elements free of fibre accumulations
    • 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
    • D01H5/60—Arrangements maintaining drafting elements free of fibre accumulations
    • D01H5/66—Suction devices exclusively
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/14—Circular knitting machines with independently-movable needles with provision for incorporating loose fibres, e.g. in high-pile fabrics

Definitions

  • the invention relates to a drafting system for a knitting machine according to the preamble of patent claim 1.
  • a circular knitting machine is proposed, the knitting points of which instead of each knitting point associated, withdrawn from a yarn tube, finished yarn presented by an upstream drafting distorted fiber structure.
  • the drafting system is a three- or more-cylinder drafting system with twin aprons and output pressure roller pair, as is also known from ring spinning machines known from the prior art for yarn production.
  • the roving is withdrawn from a jug or from a roving, fed into the drafting and warped in the drafting to the desired extent.
  • the warped fiber strand can be fed directly to the needle of a knitting point, which is arranged after the output pressure roller pair.
  • the drafting arrangements are in groups, for example three, over the circumference of the needle cylinder of the circular knitting machine. arranged distributed.
  • Each draft group consists of a number of linearly adjacent drafting systems, which are equipped with a common drive for the driven drafting components.
  • the driven drafting components each comprise at least one continuous cylinder.
  • active knitting points alternate with so-called dead zones or areas on the needle cylinder in which the circular knitting machine has no knitting points or no knitting points used during knitting.
  • dead zones or areas on the needle cylinder in which the circular knitting machine has no knitting points or no knitting points used during knitting.
  • the Applicant proposes a drafting device whose sub-cylinders each have axles which are fixed on one side to a base plate and protrude freely therefrom.
  • the drive of the sub-cylinder arranged in such a way takes place via electric motors.
  • the compact design of this drafting contributes that also arranged on the base plate electric motors have rotors which extend through the base plate and are connected on the back of the base plate with drive pinion, via which the sub-cylinder can be driven.
  • the drive function and the delay function are consistently separated.
  • the drive means arranged on the rear side of the base plate are protected by a covering from impurities due to fiber fly and abrasion.
  • Object of the present invention is therefore to improve such a compact design drafting arrangement with flying on a base plate arranged lower cylinders to the effect that the risk of contamination of the sealing gaps of the cylinder is eliminated.
  • the modification should not affect the compact design of the drafting system; It should be simple and inexpensive to carry out.
  • the drafting system according to the invention has sub-cylinders, which are fastened on one side to a housing plate and protrude freely therefrom.
  • the sub-cylinders have axes that protrude through the housing plate and are driven by motor arranged on a rear side of the housing plate drive means.
  • the arranged on the back of the housing plate drive means are provided with a largely airtight cover.
  • the housing plate is provided in the region of each sealing gap with at least one through hole. In the from the back of the housing plate and the cover substantially airtight space enclosed an overpressure can be built up.
  • the through holes make it possible to guide compressed air into the region of the annular circumferential sealing gaps from the rear side of the housing plate.
  • the blown out as a result of a slight overpressure through the through holes air flow prevents fibers, abrasion or dirt particles begin in the region of the sealing gaps.
  • the structurally very simple measure is effective and works reliably even at very low air flows. It is feasible with little effort and very inexpensive.
  • pointing away from the sealing gap air flow prove through holes with a diameter of 1 mm to 4 mm as appropriate. With these diameters, the compressed air is not pressed like a nozzle into a small section of the sealing gap, but rather covers the entire ring-shaped sealing gap over a relatively large area.
  • the housing plate or cover is provided with ports and channels for connection to a source of compressed air.
  • the drive motors are arranged on the same side as the lower cylinder.
  • On the back of the housing plate are only the drive pinion and possibly drive belt and the like, all of which have a flat design. In this way, the height of the space enclosed by the housing plate and the cover space can be kept low.
  • At least two sub-cylinders are arranged on the housing plate and interact with corresponding pressure rollers.
  • the sub-cylinders are driven by arranged on the back of the housing plate drive means.
  • the sealing gaps between their housing areas facing the end portions and the associated mounting flange are kept free by the inventively provided through holes and pointing away from the sealing gaps air flows of fibers, abrasion and impurities.
  • the drafting system may have different default elements. Conveniently, however, it comprises a main drafting zone with a pair of aprons. The distortion of a fiber dressing between cooperating straps is well proven and very effective.
  • a very expedient embodiment of the drafting system is designed as a three-cylinder drafting system.
  • Such drafting systems have a very compact design and are equipped with an input sub-cylinder and an associated input pressure roller, with a belt lower cylinder and a belt pressure roller and with an output lower cylinder and an associated output pressure roller.
  • Drawframe thus has a Vorverzugszone and a main drafting zone. This allows a very effective and uniform distortion of a supplied fiber structure.
  • a drafting system whose housing plate is advantageously provided with a quick-release device, by means of which it can be fastened in the vicinity of a knitting point on a frame part of a knitting machine.
  • a quick-release device By means of which it can be fastened in the vicinity of a knitting point on a frame part of a knitting machine.
  • the drafting device For use in known knitting machines with, for example, 48 or 96 knitting points, the drafting device has a height, measured in relation to the extent of the axes of the lower cylinders, which is 50 mm to 100 mm.
  • the drafting device can be designed for the simultaneous distortion of at least two slivers running parallel next to each other.
  • Knitting machines equipped with a drafting device according to the invention allow an immediate entanglement of a warp-knit fiber composite made from a roving (V) into a knitted fabric.
  • V roving
  • flat knitting machines can also be equipped with the above-described drafting systems.
  • the drafting systems are optimized for use with circular knitting machines. It may be provided for reasons of space that each drafting system is assigned two or more adjacent knitting points.
  • Fig. 1 is an overall perspective view of a Sirecktechnik according to the invention
  • FIG. 2 shows a plan view of the rear side of a housing plate of the drafting system
  • Fig. 3 is a sectional view of a portion of the housing plate with rear-mounted cover and front abragendem sub-cylinder.
  • Fig. 1 shows a perspective view of a total provided with the reference numeral 1 drafting system, as used for example in circular knitting machines.
  • the illustration shows the drafting system 1 from the perspective of the output of the drafting system.
  • the drafting system 1 shown for example, is in particular a so-called three-cylinder drafting system, which each have a themsun- terzylinder 3, a Riemchenunterzylinder 5 and an output lower cylinder 7, which are mounted on one side of a housing plate 2 and cantilever protrude from the front side 21 ,
  • the sub-cylinders 3, 5, 7 are each associated with pressure rollers, wherein an input pressure roller with 4, a Riemchendruckwalze with 6 and an output pressure roller is provided with the reference numeral ⁇ .
  • the input pressure roller 4 and the belt pressure roller 6 are arranged and supported on a separate mounting plate not shown in detail, which is connected via a tension spring with the housing plate 2.
  • the tension spring extends between a protruding from the housing plate abutment and a pressure pin, which is provided on the mounting plate and is loaded by a rotatably mounted on the housing plate 2 clamping eccentric.
  • the bias is adjustable via the clamping eccentric.
  • the output pressure roller 8 is mounted in a relation to the housing plate 2 freely movable bracket.
  • the holder is loaded by a leaf spring, one end of which is fastened to a mounting projection of the housing plate 2.
  • the output pressure roller 8 is inserted into the holder only and can be easily removed by lifting the output pressure roller 8 from the output lower cylinder 7 against the biasing force of the leaf spring.
  • the sub-cylinders 3, 5, and 7 are driven by electric drive motors 13, 14, which are also attached to the housing plate 2 and project freely in the vicinity of the lower cylinders 3, 5, 7 thereof.
  • the electric motors 13, 14 are preferably Asynchronous motors, which are controlled by frequency conversion.
  • the drive means for the sub-cylinders 3, 5, 7 are arranged on the back of the housing plate 2 and protected by a cover 100 against fiber fly, abrasion and contamination.
  • the cover 100 consists of a largely airtight material and is also substantially airtight connected to the housing plate 2.
  • Fig. 1 also shows a quick-release device 101, by means of which the drafting 1 is very easy and quick to mount the frame of a circular knitting machine.
  • the three-cylinder drafting system 1 is designed for the delay of roving and has a Vorverzugszone 11 and a main drafting zone 12.
  • the Vorverzugszone extends from the nip of the input lower cylinder 3 with the input pressure roller 4 to the combination Riemchenunterzylinder 5 and Riemchendruckwalze 6.
  • the main draft zone 12 extends between the combination Riemchenunterzylinder 5, Riemchendruckwalze and the output lower cylinder 7 with the associated output pressure roller 8.
  • the main delay occurs by means of a pair of straps which comprises a top apron 9 guided over the belt pressure roller 6 and a bottom apron 10 guided over the belt bottom cylinder 5.
  • the drafting system 1 has a very compact design and has, for example, over the longitudinal extent of the lower cylinder measured height of only about 50 mm to about 100 mm.
  • FIG. 2 shows a plan view of the rear side 22 of the housing plate 2, on which the actual drive means for the sub-cylinders 3, 5, 7 are arranged.
  • the cover which is intended to protect the components from contamination, has been removed for this purpose.
  • the rotors of the electric motors protrude through the housing plate 2 and carry there driving crest 15, 16.
  • the lower cylinder 3, 5, 7 have axes 31, 51, 71, which led through the housing plate 2 and on the back 22 of the housing plate 2 with Drive gears 32, 52, 72 are equipped. Toothed belts 17, 18 connect the drive pinions 15, 16 of the electric motors with the drive gears 32, 52, 72 of the sub-cylinders.
  • the input sub-cylinder and the belt lower cylinder are driven by the same drive motor.
  • the difference in the peripheral speeds of the two, the Vorverzugszone limiting lower cylinder results from the different diameters of the drive gears 32, 52.
  • the diameter of the sub-cylinders are dimensioned such that the pre-distortion is for example about 1.2 to 1.4.
  • the output sub-cylinder is driven by its own electric motor and has a much larger peripheral speed than the other two sub-cylinders.
  • the difference in speed between the double aprons and the output lower cylinder agrees the draft of the roving, which may for example have a factor of 25 to 100.
  • the fiber bundle, which is warped to the desired extent, is output at a delivery clamping line of the delivery roller pair and can be further processed directly.
  • Fig. 2 are still through holes 23, 25, 27 indicated, which are each arranged in the vicinity of the drive gears 32, 52, 72, and whose function will be explained in more detail below.
  • FIG. 3 shows, in a partially sectioned illustration, a section of the drafting system according to FIG. 1, which shows the starting lower cylinder 7 mounted in a flying manner on the housing plate 2.
  • the ratios explained on the basis of the output lower cylinder 7 apply analogously to the input lower cylinder and the lower apron cylinder.
  • the output lower cylinder 7 has a cylinder jacket 70 which is non-rotatably connected to an axis 71.
  • the axis 71 passes through an outer ring 73 and is on rolling elements 74, usually
  • the outer ring 73 is mounted in a protruding from the housing plate 2 flange 20, for example, pressed.
  • the flange 20 may be mounted on the front side 21 of the housing plate 2, but it may also be formed integrally with the housing plate 2.
  • the axis 71 of the output lower cylinder 7 projects beyond the rear side 22 of the housing plate and carries a drive gear 72.
  • the cover of the components arranged on the rear side 22 of the housing plate 2 is again provided with the reference numeral 100.
  • the space enclosed by the rear side 22 of the housing plate 2 and the cover 100 bears the reference numeral 102.
  • the housing plate 2 has at least one through-bore 27, which creates a connection between the space 102, which is substantially airtightly enclosed by the rear side 22 of the housing plate 2 and the cover 100, and the annular sealing gap 19.
  • the through hole has a diameter of about 1 mm to about 4 mm.
  • a compressed air source is connected, which supplies the necessary air pressure.
  • the connection to the compressed air source via corresponding connections, which is provided on the housing plate 2 or on the cover 100.
  • the compressed air connection is made automatically when the drafting system is mounted on the frame of the circular knitting machine. With appropriate equipment of the frame of the circular knitting machine so the compressed air connection can be made simultaneously and provided the electrical supply for the electric motors.
  • the invention has been described using the example of a three-cylinder drafting system for the delay of Flyerlunte.
  • Flyerlunte has a certain amount of rotation to give it the necessary transport strength. This rotation must first be resolved in the pre-draft zone before the fiber strand in the main draft zone is warped to the desired fineness.
  • the drafting can also have a simpler structure and be formed without Vorverzugszone. It can also be provided that the drafting device is designed for the simultaneous delay of two or more, parallel fiber assemblies supplied.

Abstract

L’invention concerne un dispositif d’étirage comprenant des cylindres inférieurs (7) fixés unilatéralement sur une plaque de boîtier (2) et faisant librement saillie de celle-ci. Les cylindres inférieurs (7) possèdent des essieux (71) faisant saillie à travers la plaque de boîtier (2) et pouvant être entraînés de façon motorisée par des moyens d’entraînement (72) disposés sur une face arrière (22) de la plaque de boîtier (2). Un jeu d’étanchéité (19) est présent entre une section d’extrémité (70) de chaque cylindre inférieur (7) orientée vers la plaque de boîtier (2) et une bride (20) reliée à la plaque de boîtier (2). Les moyens d’entraînement (72) disposés sur la face arrière (22) de la plaque de boîtier (2) sont pourvus d’un couvercle (100) largement étanche à l’air. La plaque de boîtier (2) est prévue dans la zone de chaque jeu d’étanchéité (19) d’au moins un trou débouchant (27). Une surpression peut être établie dans l’espace (102) sensiblement étanche à l’air et entouré par la face arrière (22) de la plaque de boîtier (2) et le couvercle (100).
PCT/CH2009/000264 2008-09-09 2009-07-24 Dispositif d’étirage pour un métier à tricoter WO2010028513A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH14392008A CH699521A2 (de) 2008-09-09 2008-09-09 Streckwerk für eine Strickmaschine.
CH01439/08 2008-09-09

Publications (1)

Publication Number Publication Date
WO2010028513A1 true WO2010028513A1 (fr) 2010-03-18

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Application Number Title Priority Date Filing Date
PCT/CH2009/000264 WO2010028513A1 (fr) 2008-09-09 2009-07-24 Dispositif d’étirage pour un métier à tricoter

Country Status (2)

Country Link
CH (1) CH699521A2 (fr)
WO (1) WO2010028513A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010091521A1 (fr) * 2009-02-13 2010-08-19 Rotorcraft Ag Métier à tricoter circulaire à dispositifs d'étirage intégrés
US8109009B1 (en) * 2008-07-03 2012-02-07 Collette Jerry R Air seal for rotary dryer/kiln
WO2013188181A1 (fr) 2012-06-11 2013-12-19 Eli Lilly And Company Protéines du facteur de croissance des fibroblastes 21
DE102013103738A1 (de) 2013-04-15 2014-10-16 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Streckwerk für eine Strickmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518780A (en) * 1947-08-26 1950-08-15 Rieter Joh Jacob & Cie Ag Apparatus for preventing fly from depositing on the drive members of textile machines
EP0532457A1 (fr) * 1991-09-12 1993-03-17 Maschinenfabrik Rieter Ag Machine textile avec des unités de travail produisant du duvet
DE4130091A1 (de) * 1991-09-11 1993-06-24 Barmag Spinnzwirn Gmbh Gruppenantrieb fuer galetten
WO2007025490A1 (fr) * 2005-08-30 2007-03-08 Koenig Reinhard Systeme d'etirage a haute capacite et procede associe
DE102006037716A1 (de) * 2006-08-07 2008-02-14 Wilhelm Stahlecker Gmbh Vorrichtung zum Herstellen einer Maschenware
WO2009026734A1 (fr) * 2007-08-31 2009-03-05 Rotorcraft Ag Unité d'étirage pour une machine à tricoter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2518780A (en) * 1947-08-26 1950-08-15 Rieter Joh Jacob & Cie Ag Apparatus for preventing fly from depositing on the drive members of textile machines
DE4130091A1 (de) * 1991-09-11 1993-06-24 Barmag Spinnzwirn Gmbh Gruppenantrieb fuer galetten
EP0532457A1 (fr) * 1991-09-12 1993-03-17 Maschinenfabrik Rieter Ag Machine textile avec des unités de travail produisant du duvet
WO2007025490A1 (fr) * 2005-08-30 2007-03-08 Koenig Reinhard Systeme d'etirage a haute capacite et procede associe
DE102006037716A1 (de) * 2006-08-07 2008-02-14 Wilhelm Stahlecker Gmbh Vorrichtung zum Herstellen einer Maschenware
WO2009026734A1 (fr) * 2007-08-31 2009-03-05 Rotorcraft Ag Unité d'étirage pour une machine à tricoter

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8109009B1 (en) * 2008-07-03 2012-02-07 Collette Jerry R Air seal for rotary dryer/kiln
WO2010091521A1 (fr) * 2009-02-13 2010-08-19 Rotorcraft Ag Métier à tricoter circulaire à dispositifs d'étirage intégrés
WO2013188181A1 (fr) 2012-06-11 2013-12-19 Eli Lilly And Company Protéines du facteur de croissance des fibroblastes 21
DE102013103738A1 (de) 2013-04-15 2014-10-16 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Streckwerk für eine Strickmaschine
WO2014170087A1 (fr) 2013-04-15 2014-10-23 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Banc d'étirage pour machine à tricoter
JP2016519224A (ja) * 2013-04-15 2016-06-30 ジプラ パテントエントビクルングス−ウント ベタイリグングスゲゼルシャフト エムベーハーＳｉｐｒａ Ｐａｔｅｎｔｅｎｔｗｉｃｋｌｕｎｇｓ−Ｕｎｄ Ｂｅｔｅｉｌｉｇｕｎｇｓ−Ｇｅｓｅｌｌｓｃｈａｆｔ Ｍｉｔ Ｂｅｓｃｈｒａｎｋｔｅｒ Ｈａｆｔｕｎｇ 編み機用の延伸機

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