US3881308A - Sliver condenser for a fiber separating device of open-end spinning units - Google Patents

Sliver condenser for a fiber separating device of open-end spinning units Download PDF

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Publication number
US3881308A
US3881308A US415808A US41580873A US3881308A US 3881308 A US3881308 A US 3881308A US 415808 A US415808 A US 415808A US 41580873 A US41580873 A US 41580873A US 3881308 A US3881308 A US 3881308A
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United States
Prior art keywords
duct
cross
sliver
condenser
sectional
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Expired - Lifetime
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US415808A
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English (en)
Inventor
Milan Marsalek
Vaclav Brynda
Jan Junek
Frantisek Hortlik
Josef Ripka
Vaclav Vobornik
Vladimir Ohlidal
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Vyzkumny Ustav Bavlnarsky AS
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Vyzkumny Ustav Bavlnarsky AS
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    • 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
    • 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
    • D01H5/72—Fibre-condensing guides

Definitions

  • the condenser comprises a comb- Orlici, Czechoslovakia ing-out cylinder and a sliver supplying mechanism as- [22] Filed: N0 14 1973 sociated therewith, such supplying mechanism consists elther of a pair of feed rollers or of a feed roller coop- PP- 415,803 crating with a pressure shoe between which the sliver discharged from the condenser is compressed.
  • the present invention relates to a sliver condenser for a fiber separating device of open-end spinning units, said units comprising a combing-out cylinder and a sliver supplying mechanism associated therewith, such mechanism consisting either of a pair of feed rollers or of a feed roller cooperating with a pressure shoe between which the sliver discharged from the condenser is compressed.
  • the sliver condenser according to the invention enables a uniform fiber distribution across the whole sliver width in the nip zone of the sliver supplying mechanism.
  • the fiber of sliver delivered by the supplying mechanism are opened and separated by the combing-out cylinder and conveyed into a rotary spinning chamber where they are converted to yarn.
  • the sliver has to be formed in the condenser in such a manner that it manner that it may assume, before having entered the nip zone, a rectangular cross-section with evenly distributed fibers so that it may bee spread to width corresponding to the active combing-out cylinder width.
  • the sliver supplying mechanism will control, during the fiber separating operation, only the fiber within the maximum fiber density region while the other or marginal fibers are combed out in relatively bulky agglomeration', this impairs the spinning process and leads finally to a reduction of yarn quality
  • Well-known sliver condenser arrangements having a duct of rectangular cross-section of which area from the intake to the outlet port continuously decreases, do not meet the conditions hereinabove set forth, particularly if the sliver is supplied to the condenser in a nonaxial direction, since in this case the sliver tends to follow one of the condenser sides.
  • the rectangular cross-section outline of the sliver entering the nip zone and uniform fiber density within the sliver crosssection are ensured by the sliver condenser according to the invention, such condenser having a duct of which cross-sectional area continuously diminishes from the intake to the outlet port, too.
  • the dimensions of the duct cross-sections parallel with the feed roller axis are greater than the maximum widths of the respective cross-sections, i.e., the maximum dimensions perpendicular to said heights, so that at least within this duct length portion the two opposite duct walls are wider than the two other opposite duct walls, while within one and the same cross-section the cross-sectional width continuously or gradually varies so hat the maximum width of the cross-section is adjacent at least of the opposite duct walls.
  • the intake duct port has a cross-sectional shape other than the afore-described shape of duct cross-section, viz., e.g., a circular, oval or rectangular shape
  • the duct shape continuously varies in the direction from said intake port to assume the aforesaid cross-sectional shape.
  • the ratio between the minimum and the maximum cross-sectional shape widths is selected within the range offrom l:1.l to 1:5.
  • the shape of sliver passing therethough is smoothly and continuously changed. Due to the fact that the heights of the successive duct cross-sections, i.e., the dimensions parallel with the axes of both feed roller and combing-out roller, exceed the cross sectional widths, the sliver, when passing through the condenser, is being spread over the width approaching the active width of the combing-out cylinder. Since within different regions of one and the same duct crosssection the cross-sectional width varies. the different sliver portions during the passage are exposed to varying resistance; for this reason, such a duct shape is preferably selected so as to exert the maximum resistance to the maximum fiber density sliver region. Thus the fibers are displaced from the central maximum density region to the peripheral sliver portions where the fibers density is reduced.
  • the maximum resistance the sliver is exposed to during its passage is exerted by the narrowest portion of the duct cross-section. Therefore, if the sliver of a substantially circular or oval cross section is to be supplied to the condenser in the axial direction, such a duct shape is preferably selected so that the narrowest duct portion be situated substantially in the middle of its cross-sectional height.
  • the shape of condenser duct is preferably such that the minimum cross-sectional width of the duct shape is situated substantially adjacent one of the two opposite wider duct walls, preferably the wall one which receives the entering sliver.
  • FIG. 1 is a vertical sectional view of an open-end spinning unit equipped ith the sliver condenser according to the invention
  • FIG. 2 is a perspective view of an exemplary condenser embodiment
  • FIG. 3 is a top view of the sliver condenser as shown in FIG. 2, viewed from its intake port;
  • FIGS. 4 and S are top views of two respective alternative embodiments of the sliver condenser to the invention.
  • FIGS. 6 and 7 are views in cross-sections of two further condenser duct embodiments, respectively;
  • FIG. 8 is a top view of an alternative sliver condenser embodiment, viewed from its intake port.
  • FIG. 9 is a cross-sectional view of a modified condenser duct provided with longitudinal inner webs.
  • the open-end spinning unit comprises a rotary spinning chamber 1, a fiber separating device for treating fiber 2 to be supplied into the spinning chamber 1, and a pair of take-off rollers 3 for delivering yarn 4 from the spinning chamber l.
  • the fiber separating device comprises a combing-out cylinder 5 and a sliver supplying mechanism associated thereto and including a feed roller 6 and a pressure shoe 7 forming a nip zone therewith, the two aforementioned elements being preceded by a silver condenser 8.
  • a sliver 9 discharge from the condenser 8 is led through the nip zone provided between the feed roller 6 and the pressure shoe 7 and is opened by the combing-out cylinder 5 so that fibers 2 are separated from one another. This fibers once separated are then conveyed through a supply channel 10 into the spinning chamber 1 where they are twisted to form yarn 4 which is taken off and finally wound up to form a package 1 1.
  • FIGS. 2 and 3 which show the duct of the sliver condenser 8, the area of the duct cross-section continuously diminishes from the intake port 12 to the outlet port 13 of the duct.
  • the outline of the cross-sectional area when viewed at from the intake port 12 of the duct, continuously varies in the direction towards the outlet port 13 thereof from a substantially rectangular to a substantially hour-glass shape represented in FIG. 2 by the crosssection 14.
  • This cross-section 14 as well as the other downstream cross-section up to the outlet port 13 have similar outlines.
  • width 16 of the cross-section means the dimension perpendicular to the height 15 of the crosssection With the cross-section 14, the minimum width 16 to the maximum width 16 has a ratio of 111.6 while at the outlet port 13 this ratio amounts to 1:3. Thus along the so shaped duct portion the minimum width 16 of the cross-section thereof is substantially always in the middle of its height 15.
  • the above-described embodiment is suitable for cases wherein the sliver is supplied to the condenser 8 in the axial direction.
  • the sliver Due to the face that the heights of the condenser duct cross-sections, i.e, the dimensions parallel with the axes of both the feed roller 6 and the combing-out cylinder 5, exceed the widths 16 of said cross-sections, the sliver is compressed during its passage through the condenser in the direction of cross-section width 16 whereby it is spread over the width approaching to the active width of the combing-out cylinder 5.
  • the even fiber distribution within the condensed sliver is attained by having the narrowest duct portion diaposed in the middle of the height 15 of its cross-section.
  • the sliver zone having the maximum fiber density is caused to pass the central portion of the duct. It is to be understood that this sliver part is exposed to the maximum resistance imposed by the tapered condenser duct. Thus the fibers are forced from the central sliver portion into the peripheral regions wherein the fiber density is reduced.
  • the ducts of condensers 8 shown in FIGS. 4 and 5, respectively, may also be used in case of axial sliver feed into the condenser.
  • the embodiment of the condenser according to FIG. 4 has an oval intake port 12 and a rectangular outlet port 13.
  • the embodiment shown in FIG. 5 has a circular intake port 12 and a rectangular outlet port 13.
  • the duct cross-section shown in FIG. 6 is also suitable for use with axially fed sliver condensers. As it is apparent, one of the duct side walls in FIG. 6 is convex.
  • the duct cross-section having the outline shown in FIG. 7 may advantageously be used.
  • the narrowest duct wall 17 is designed to receive the sliver entering the condenser and to exert the maximum opposition upon the passing sliver so that fibers thereof are forced towards the opposite wall.
  • FIG. 8 shows a condenser embodiment wherein the outlines of both the intake and outlet ports 12 and 13,
  • the minimum width 16 of the intake port 12 to the maximum width 16 thereof has the ratio 121.1. In the direction towards the outlet port 13 the difference between the minimum and the maximum width 16 increases until at the outlet port 13 it attains a ratio of 1:4.
  • the opposite wider duct sides are provided with three longitudinal webs 18 designed for effectively spreading the sliver in the direction from the center of the duct towards the narrower walls.
  • This embodiment is suitable to be used cooperating with wider combing-out cylinders 5.
  • a sliver condenser for a fiber separating device of an open-end spinning unit comprising a combing-out cylinder and a sliver supplying mechanism associated therewith comprising a feed roller cooperating with a pressure member between which the sliver discharged from the condenser is compressed, a sliver condenser duct having an intake and an outlet port, the crosssectional area of the duct continuously diminishing from the intake to the outlet port, the heights of duct cross-sections within at least a portion of the duct length parallel with the feed roller axis being greater than the maximum widths of the respective crosssections perpendicular to the last-mentioned heights, so that at least within said portion of the duct length the two opposite duct walls are wider than the two other opposite duct walls, within one and the same duct cross-section the cross-sectional width gradually varying so that the maximum width of the cross-section is adjacent at least one of the opposite duct walls.
  • each of the opposite wider duct walls is provided with at least one longitudinal web.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US415808A 1972-11-29 1973-11-14 Sliver condenser for a fiber separating device of open-end spinning units Expired - Lifetime US3881308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS8120A CS163512B1 (enrdf_load_stackoverflow) 1972-11-29 1972-11-29

Publications (1)

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US3881308A true US3881308A (en) 1975-05-06

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ID=5431362

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US415808A Expired - Lifetime US3881308A (en) 1972-11-29 1973-11-14 Sliver condenser for a fiber separating device of open-end spinning units

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US (1) US3881308A (enrdf_load_stackoverflow)
JP (1) JPS4993629A (enrdf_load_stackoverflow)
CH (1) CH570474A5 (enrdf_load_stackoverflow)
CS (1) CS163512B1 (enrdf_load_stackoverflow)
DD (1) DD108329A5 (enrdf_load_stackoverflow)
DE (1) DE2359176A1 (enrdf_load_stackoverflow)
FR (1) FR2208012B1 (enrdf_load_stackoverflow)
GB (1) GB1402402A (enrdf_load_stackoverflow)
IT (1) IT1001938B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103060963A (zh) * 2012-12-25 2013-04-24 青岛大学 顺向聚捻一步纺纱机及一步纺纱方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2063318B (en) * 1979-11-20 1983-06-29 Tashkent Sp Konstrukt Bjuro Te Sliver condenser for open-end spinning machines
US4301574A (en) 1979-11-20 1981-11-24 Zhestkov Vitaly I Sliver condenser for open-end spinning machines
DE4222840B4 (de) * 1992-07-11 2006-06-14 Saurer Gmbh & Co. Kg Offenend-Spinnvorrichtung
ITMI20010079A1 (it) * 2000-01-29 2002-07-17 Truetzschler & Co Dispositivo su una carda per ottenere un insieme di fibre
US6550106B2 (en) 2000-01-29 2003-04-22 TRüTZSCHLER GMBH & CO. KG Fiber web guiding device for forming a sliver from a fiber web

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US325700A (en) * 1885-09-08 Sliver trumpet or guide for spinning mule s or frames
US1499607A (en) * 1921-03-10 1924-07-01 Dawson James Henry Fiber-treating appliance for drawing and preparing fibers for spinning into yarns
US1854690A (en) * 1929-08-23 1932-04-19 Casablancas Fernando Mechanism for joining and drawing textile tapes or slivers
US2206232A (en) * 1938-10-27 1940-07-02 H & B American Machine Company Apparatus for drafting textile slivers or rovings
US3020600A (en) * 1959-11-23 1962-02-13 Saco Lowell Shops Fly removing apparatus
US3083414A (en) * 1959-09-12 1963-04-02 Luwa Ag Forming funnel and method of forming sliver
US3246370A (en) * 1963-04-24 1966-04-19 Maremont Corp Textile fiber condensting trumpet
US3353210A (en) * 1965-12-09 1967-11-21 Du Pont Rectangular convergence guide
US3387339A (en) * 1964-09-14 1968-06-11 Bofill Carlos Salles Sliver condenser for drawing frames
US3447206A (en) * 1967-10-24 1969-06-03 Whitin Machine Works Draw frame for blending fibers
US3626681A (en) * 1968-08-08 1971-12-14 Toyoda Automatic Loom Works Ringless spinning machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB632266A (en) * 1947-09-02 1949-11-18 Howard & Bullough Ltd Improvements in or relating to drafting apparatus for textile spinning and like machines

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US325700A (en) * 1885-09-08 Sliver trumpet or guide for spinning mule s or frames
US1499607A (en) * 1921-03-10 1924-07-01 Dawson James Henry Fiber-treating appliance for drawing and preparing fibers for spinning into yarns
US1854690A (en) * 1929-08-23 1932-04-19 Casablancas Fernando Mechanism for joining and drawing textile tapes or slivers
US2206232A (en) * 1938-10-27 1940-07-02 H & B American Machine Company Apparatus for drafting textile slivers or rovings
US3083414A (en) * 1959-09-12 1963-04-02 Luwa Ag Forming funnel and method of forming sliver
US3020600A (en) * 1959-11-23 1962-02-13 Saco Lowell Shops Fly removing apparatus
US3246370A (en) * 1963-04-24 1966-04-19 Maremont Corp Textile fiber condensting trumpet
US3387339A (en) * 1964-09-14 1968-06-11 Bofill Carlos Salles Sliver condenser for drawing frames
US3353210A (en) * 1965-12-09 1967-11-21 Du Pont Rectangular convergence guide
US3447206A (en) * 1967-10-24 1969-06-03 Whitin Machine Works Draw frame for blending fibers
US3626681A (en) * 1968-08-08 1971-12-14 Toyoda Automatic Loom Works Ringless spinning machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103060963A (zh) * 2012-12-25 2013-04-24 青岛大学 顺向聚捻一步纺纱机及一步纺纱方法
CN103060963B (zh) * 2012-12-25 2015-01-07 青岛大学 顺向聚捻一步纺纱机及一步纺纱方法

Also Published As

Publication number Publication date
IT1001938B (it) 1976-04-30
GB1402402A (en) 1975-08-06
JPS4993629A (enrdf_load_stackoverflow) 1974-09-05
DD108329A5 (enrdf_load_stackoverflow) 1974-09-12
CH570474A5 (enrdf_load_stackoverflow) 1975-12-15
CS163512B1 (enrdf_load_stackoverflow) 1975-09-15
FR2208012A1 (enrdf_load_stackoverflow) 1974-06-21
DE2359176A1 (de) 1974-05-30
FR2208012B1 (enrdf_load_stackoverflow) 1976-11-19

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