US2752748A - Twisting head - Google Patents

Twisting head Download PDF

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Publication number
US2752748A
US2752748A US267750A US26775052A US2752748A US 2752748 A US2752748 A US 2752748A US 267750 A US267750 A US 267750A US 26775052 A US26775052 A US 26775052A US 2752748 A US2752748 A US 2752748A
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US
United States
Prior art keywords
rollers
delivery
twisting
housing
duct
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.)
Expired - Lifetime
Application number
US267750A
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English (en)
Inventor
Hadwich Fritz
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.)
Schiess AG
Original Assignee
Schiess AG
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 Schiess AG filed Critical Schiess AG
Application granted granted Critical
Publication of US2752748A publication Critical patent/US2752748A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D01H7/00—Spinning or twisting arrangements
    • D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
    • D01H7/923—Spinning or twisting arrangements for imparting transient twist, i.e. false twist by means of rotating devices

Definitions

  • twisting heads for spinning and twisting frames have not been fully utilised in practice is that the roving readily laps around rapidly rotating delivery rollers. This results in interruptions as, with the known constructions, the twisting heads have then to be opened and even be partly removed from the frame.
  • the known twisting heads are subject to the great danger of being soiled by fibrous fiuif and the impurities contained in the roving, the removal of which necessitated from time to time stopping the frame and perhaps opening the twisting heads. These conditions conflict with the requirement for continuous operation.
  • the present invention is based on the realization that stripping edges must be provided adjacent the delivery rollers of the twisting heads.
  • the rectilinear stripping edges as heretofore known on other rollers would not be successful, because the delivery opening or the delivery duct for the twisted material must, as far as possible, be of circular cross-section.
  • straight stripping edges When straight stripping edges are used, they form with the cylindrical delivery duct, dead spaces behind the delivery rollers which become filled with fibre fiuff and interfere with the operation of the twisting head.
  • the parts of the rollers disposed beyond the nip of the rollers are enclosed with small clearance by the delivery roller housing with cylindrical surfaces in such manner that those surfaces, together with the delivery duct commencing directly at the rollers, form a kind of stripping edge at the rollers for the yarn.
  • the delivery duct with this construction therefore proceeds directly from the delivery rollers, and its upper surface closely conforms to the cylindrical surface of the rollers, so that the yarn issuing from the rollers meets only the inlet opening of the duct and consequently can only pass into that opening.
  • the clearance between the upper surface of the delivery opening and the rollers which is necessary in order to permit rotation of the delivery rollers without friction, is kept so small that the material cannot pass through in any case, thereby excluding the possibility of lapping round the rollers.
  • another feature of the invention consists in the arrangement of lateral passages in the delivery roller housing which adjoin the cylindrical surfaces or the clearance space and lead outwardly. Fibrous fluff and particles of dust are thrown outwards through these passages due to centrifugal force, whereby a continuous automatic cleaning of the twisting head is achieved.
  • Figure 1 is a vertical section through a twisting head
  • Figure 2 is a perspective view of the bottom part of the delivery roller housing and one delivery roller.
  • the roller housing 1 of the twisting head shown in Figure 1 is made in two parts.
  • the upper part provides a roving feed conductor 2 on which runs a helical gear 3 having a toothed annulus 4 which meshes with pinions 5 arranged on opposite sides of the delivery rollers so that the latter rotate in opposite directions.
  • the gear 3 is driven by a gear 7 from the upper driving shaft.
  • the lower part of the roller housing 1 is formed with lateral helical teeth 8 which mesh with a helical gear 9 on the lower driving shaft.
  • the lower part of the roller housing 1 has a bush-like extension 10 mounted in the external housing 11 secured to the frame.
  • the extension 10 provides a vertical delivery or outlet duct 12 of circular cross-section through which the yarn leaves the spinning head. This outlet duct 12 flares downwardly.
  • the lower part of the roller housing 1 has cylindrical guide surfaces 13 which extend with small clearance around those parts of the delivery rollers 6 which are beyond the nip of the rollers so that, as shown in Figure l, something less than a quarter of the total periphery of the delivery rollers is enclosed.
  • the delivery duct 12 and the guide surfaces 13 define, directly below the delivery rollers, shipping edges 14 which, being the intersection of two cylinders, are three-dimensional curves.
  • lateral passages 15 leading to the outside of the roller housing.
  • the bottoms of these passages are stepped downwards from the guide surfaces 13, as indicated at 16.
  • webs 17 are provided in the roller housing which are disposed one on each side of the guide surfaces 13 and the passages 15 and provide side walls for those passages.
  • the spacing of the webs 17 from one another is somewhat greater than the diameter of the delivery duct 12 and thus determines the width of the guide surfaces 13, as can be seen in Figure 2.
  • the webs 17 Over their central portion Where the delivery rollers 6 are mounted, the webs 17 extend parallel to one another, but on either side of that portion, they diverge from one another.
  • the driving gears 5 of the delivery rollers 6 are enclosed in the spaces between the webs 1.7 and the outside wall of the housing 1.
  • the delivery duct 12 conforms closely to the delivery rollers where the yarn emerges from the nip of the rollers. There are no openings or dead spaces except for the small clearance which must exist between the guide surfaces 13 and the delivery rollers to permit free rotation of the latter.
  • the clearance may be made very small, but, with flexible delivery rollers, it should be such that even on distortion of the delivery rollers, caused by impurities, by the handling of rovings of different thicknesses, etc., satisfactory operation is ensured. Under normal conditions, a clearance of about 0.02 millimetre is appropriate.
  • the close positioning of the delivery duct and the delivery rollers is optional.
  • all parts such as the guides 13, the delivery duct '12, the passages 14 and the like are made in one piece with the roller housing 1.
  • the roller housing can usefully 'be manufactured of a mouldahle material thus avoiding the necessity for milling the guide surfaces 13 and the like.
  • the individual parts may be made independently: for example, it is poss'ibleto make the delivery duct 12 as a tube'w'hich is fitted 'in the roller housing.
  • the guide surfaces may be formed on the tribe itself, its upper end being suitably shaped by milling .or the like. It is .then possible to regulate .the size of the clearance space within certain limits by adjustment of'the tube.
  • the passages 15 are arranged in the upper and lower part of the roller housing. It is, however, sutficient to provide them in only one of the two parts of the housing.
  • a twisting head for spinning and twisting frames comprising-a plurality of delivery rollers arranged to form a hip, means for rotating said rollers about their axes, a housing .in which said rollers are mounted and which is revolu'ble about an axis at right angles to the nipping line, and an outlet duct in said housing for receiving twisted material passing through said n'ip, said outlet duct having bounding surfaces forming stripping .edges conforming to the surface of said rollers and disposed very close to but venting the material from lapping around the rollers, said housing having lateral passages which communicate with said outlet duct through the clearance between said surfaces and said rollers, dirt particles and fluff being discharged through said clearance and lateral passages.
  • a twisting head as claimed in claim 1 in which the bottom bounding sin-face ofsaid lateralpassages is stepped downwards from the lowest point in said bounding surfaces.
  • a twisting head according to claim 3 in which said We'bs are spaced apart a distance greater than the distance across the outlet duct.
  • a twisting head as claimed in claim 1 in which said housing has a pair of webs adapted to support said rollers and defining between .them .said lateral passages, said webs extending-parallel .to-each other over their central portions and .di-verg-ing laterally iromeach otherover their end portions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US267750A 1951-01-24 1952-01-23 Twisting head Expired - Lifetime US2752748A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE299331X 1951-01-24

Publications (1)

Publication Number Publication Date
US2752748A true US2752748A (en) 1956-07-03

Family

ID=6091222

Family Applications (1)

Application Number Title Priority Date Filing Date
US267750A Expired - Lifetime US2752748A (en) 1951-01-24 1952-01-23 Twisting head

Country Status (5)

Country Link
US (1) US2752748A (da)
BE (1) BE508656A (da)
CH (1) CH299331A (da)
FR (1) FR1048229A (da)
GB (1) GB717521A (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770016A (en) * 1953-11-10 1956-11-13 Whitin Machine Works Sliver coiling mechanism
US2835930A (en) * 1955-03-24 1958-05-27 Warner Swasey Co Coiler for gill box

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US28161A (en) * 1860-05-08 Machines
US31031A (en) * 1861-01-01 plummer
US135338A (en) * 1873-01-28 Improvement in machines for twisting oakum
US337015A (en) * 1886-03-02 Head for continuous drawing and twisting
US682245A (en) * 1901-03-01 1901-09-10 Edward F Dreman Fabric-twisting machine.
GB190728325A (en) * 1907-12-24 1908-07-02 Fernando Casablancas Improvements in and connected with a Process and Apparatus for the Continuous and Simultaneous Drawing and Twisting of Textile Slivers.
FR574360A (fr) * 1923-12-03 1924-07-10 Appareil tordeur pour le filage ou le retordage de tous textiles
US1746433A (en) * 1928-04-20 1930-02-11 Davis & Furber Spinning machine
US2522332A (en) * 1945-08-24 1950-09-12 Abbott Machine Co Textile drafting apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US28161A (en) * 1860-05-08 Machines
US31031A (en) * 1861-01-01 plummer
US135338A (en) * 1873-01-28 Improvement in machines for twisting oakum
US337015A (en) * 1886-03-02 Head for continuous drawing and twisting
US682245A (en) * 1901-03-01 1901-09-10 Edward F Dreman Fabric-twisting machine.
GB190728325A (en) * 1907-12-24 1908-07-02 Fernando Casablancas Improvements in and connected with a Process and Apparatus for the Continuous and Simultaneous Drawing and Twisting of Textile Slivers.
FR574360A (fr) * 1923-12-03 1924-07-10 Appareil tordeur pour le filage ou le retordage de tous textiles
US1746433A (en) * 1928-04-20 1930-02-11 Davis & Furber Spinning machine
US2522332A (en) * 1945-08-24 1950-09-12 Abbott Machine Co Textile drafting apparatus

Also Published As

Publication number Publication date
BE508656A (da)
GB717521A (en) 1954-10-27
FR1048229A (fr) 1953-12-21
CH299331A (de) 1954-06-15

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