EP0456865A1 - Dispositif pour la filature de fibres discontinues - Google Patents

Dispositif pour la filature de fibres discontinues Download PDF

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Publication number
EP0456865A1
EP0456865A1 EP90109364A EP90109364A EP0456865A1 EP 0456865 A1 EP0456865 A1 EP 0456865A1 EP 90109364 A EP90109364 A EP 90109364A EP 90109364 A EP90109364 A EP 90109364A EP 0456865 A1 EP0456865 A1 EP 0456865A1
Authority
EP
European Patent Office
Prior art keywords
spinning rotor
guide body
fibers
spinning
wall
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Withdrawn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
EP90109364A
Other languages
German (de)
English (en)
Inventor
Petr Blazek
Stanislav Didek
Zdenek Havránek
Alois Stejskal
Vera Lehka
Zelmira Borovcova
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.)
Vyzkumny Ustav Bavlnarsky AS
Original Assignee
Vyzkumny Ustav Bavlnarsky AS
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 Vyzkumny Ustav Bavlnarsky AS filed Critical Vyzkumny Ustav Bavlnarsky AS
Publication of EP0456865A1 publication Critical patent/EP0456865A1/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Withdrawn legal-status Critical Current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
    • D01H4/04—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 imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor

Definitions

  • the invention relates to a device for spinning staple fibers with a spinning rotor and a driven guide body in the form of a ring, tube or the like, which coaxially engages in the spinning rotor and its inner wall for depositing the supplied fibers, for supporting them and finally for transferring them to the Spinning rotor is used, wherein through holes are provided in the bottom of the spinning rotor, by means of which interior spaces of the spinning rotor and the guide body are connected to a first suction means.
  • a disadvantage of this device is that it makes it possible to produce only a limited range of yarns from cotton fibers and cotton-like chemical fibers. In practice, these are only so-called carded yarn types from 14.4 to 100 tex or 166 tex, for which shorter and coarser types of fiber are used. When using finer fibers it is possible to reach the number range of so-called worsted yarns, but the end product does not have the corresponding properties. Such worsted types of 5 to 14.5 tex are only spun out of longer and finer staple fibers on ring spinning lines.
  • the fibers require complicated and costly preparation, which usually consists in the fact that the coating process is followed by a four-fold warping, which is carried out on three lines, and finally by a sliver doubling machine, or in that, after the coating process, a shortened, double drawing process on a single drawing machine and finally the sliver doubling machine is used.
  • the resulting wrap is subsequently placed in the comber, which is followed by two to three times the delay. Waste from the combing chair - so-called combs - is then usually used to make vigognegarn.
  • the invention has for its object to provide such measures in the aforementioned generic device that make it possible on the one hand from the fibers suitable for spinning worsted top quality worsted without prior combing and brushing, on the other hand from the finer, suitable for spinning carded yarns Types of fibers to produce at least some coarser types of worsted.
  • this object is achieved in such a way that the spinning rotor and the guide body are surrounded by an air box in the region of an intermediate gap at least on part of their outer circumference, which corresponds to an intermediate section of the movement path of the fibers between the inner wall of the guide body and the inner wall of the spinning rotor. which is open in relation to the intermediate gap and connects to a second suction means.
  • the air flow values in the device can be set so that a certain small amount of air, which is used for fiber supply, escapes from the communicating spaces of the spinning rotor and the guide body through a gap between them.
  • short fibers of selectable stack length are then delivered outside the spinning rotor, while yarn of the desired type and quality, ie comb-like yarn, is spun out of the remaining longer fibers in the spinning rotor.
  • the removal of the short fibers of a certain length and the leaving of fibers of a certain length in the spinning process can be brought about by suitably adjusting the ratio of the rotational speeds of the spinning rotor and the guide body. These removed short fibers do not mean any loss since they are used for further processing, e.g. are also applicable to another type of yarn.
  • the device can also work as a conventional open-end spinning unit with the spinning rotor and the guide body and that it is therefore able to spin out a wider range of yarns.
  • the second suction means is preceded by a filter device for retaining and collecting the fibers.
  • the spinning station 1 which forms a component of the device according to the invention, can - apart from the modified system for extracting air from the communicating interior of the spinning rotor and the guide body - be of conventional design. Likewise, the entire, not shown, several such spinning stations 1 including the air suction system for the same comprehensive spinning machine can also be arranged, the air suction system having either a first and a second suction means or a single central suction means - as explained further below.
  • the spinning station 1 illustrated in FIG. 1 has a conventional spinning rotor box 2 with a removable cover 3.
  • the cover 3 contains an annular guide body 4 which is rotatably mounted on the inside thereof and is coupled by means of a drive belt 5 to a motor drive means (not shown), and furthermore a feed channel which opens at an angle into the interior of the guide body 4 and serves for feeding fibers 7 from a dissolving device (not shown) 6 and a draw-off tube 8 for pulling off the yarn 9.
  • the inner wall of the guide body 4 is concentric with its axis of rotation X and has the shape of a conical jacket with the largest diameter at the outlet end 11.
  • a bowl-shaped spinning rotor 12 has the inner wall 13, which widens conically into the inside and which, at its largest diameter, merges into a peripheral collecting channel 14 for depositing the fibers 7.
  • the spinning rotor 12 is arranged inside the spinning rotor box 2 by means of its shaft 15, which is rotatably mounted in a bearing bush 16 provided in the socket part 17 of the box 2 under the load of a locking screw 18.
  • the free end of the shaft 15, which protrudes from the bearing bush 16, is coupled by means of a drive belt 20 to a motor drive means, not shown. This can be identical to the means used to drive the guide body 4 or it can be a completely independent element.
  • a connection hole 21 is provided which is connected to a first suction means 23 by means of a first suction pipeline 22.
  • this first suction pipeline 22 can lead directly to the first suction means 23 or as a branch of a first main channel 24, which is common to several spinning rotor boxes 2 and which is only then connected to the first suction means 23.
  • the first suction means 23 is preceded by an air control means 25 in the form of a slide.
  • Through holes 27 are provided in the bottom 26 of the spinning rotor 12, by means of which its interior communicates with the interior of the box 2.
  • the holes 27 are oriented obliquely with respect to the radial plane of the base 26, which gives the spinning rotor 12 properties of an impeller of a fan. With regard to the connection of the spinning rotor box 2 to the first suction means 23, there may be other holes which do not produce an air flow.
  • the axis X which represents the axis of rotation of the guide body 4
  • the guide body 4 projects coaxially into the spinning rotor 12, a gap 28 being formed between these two components .
  • This is delimited by two end faces 29, 30 at the outlet end 11 of the guide body 4, the first end face 29, which is closer to the axis of rotation X, being conical, while the end face 30 further from this axis is radial.
  • These end faces 29, 30 correspond to opposite end faces at the entry end 31 of the spinning rotor 12.
  • the spinning rotor 12 and the guide body 4 are surrounded in the area of the gap 28 between them by an air box 32 which is open against this gap 28 and in this case has the shape of a hollow ring.
  • the air box 32 is mounted between the cover 3 and the spinning rotor box 2 and centered with respect to the spinning rotor 12 and the guide body 4 by means of an annular projection 33 provided on its radial wall 34 and inserted into a corresponding end opening 35 of the spinning rotor box 2.
  • the radial wall 34 corresponds to an outer cylindrical surface 36 which is provided at the inlet end 31 of the spinning rotor 12, extends from the radial wall 34 on both sides and practically closes the interior of the spinning rotor box 2 at this end.
  • the second radial wall 37 of the air box 32 corresponds to the outer cylindrical surface 38 of the guide body 4.
  • the box 32 is connected to the second suction means 41 by means of a connection hole 39 in the peripheral wall of the air box 32 and the second suction pipeline 40 connected to this hole.
  • this can be a direct connection of the air box 32 to the second suction means 41 with the aid of the second suction pipeline 40 or - as shown - the second suction pipeline 40 forms a branch of the second Main channel 42, which serves for several air boxes 32 together and which is only then connected to the second suction means 41.
  • a filter device 43 is arranged upstream of the second suction means 41. This can be of any design customary in ventilation technology on textile machines, a suitable air control means 45 in the form of a slide being inserted into the connecting pipe 44 between the filter device 43 and the second suction means 41.
  • the air control means 45 and the air control means 25 arranged upstream of the first suction means 23 are used to regulate the negative pressure in the air box 32 or in the spinning rotor box 2.
  • the air control means 25, 45 can be used Dispense quite well if suction devices 23 and 41 with selectable suction power, eg fans with regulation of the rotation speed or the blade position, are used.
  • each of the air control means 25, 45 can be omitted, using the corresponding suction means 23 or. 41 with selectable suction power.
  • the hollow ring shape - as shown - of the air box 32 is also not mandatory; for example, it can consist only of part of such a ring in the form of a nozzle.
  • this alternative, not illustrated, requires exact dimensions and localization of this component with respect to the intermediate section of the path of movement of the fibers 7 between the inner wall 10 of the guide body 4 and the inner wall 13 of the spinning rotor 12, which will be explained in more detail.
  • the device according to the invention operates as follows when spinning the yarn of comb-like character:
  • the spinning rotor 12 and the guide body 4 rotate in the same sense, but the guide body 4 is slower than the spinning rotor 12, but at the same time faster than the air supplying the fibers 7 through the feed channel 6 to its inner wall 10. Almost all air that enters the communicating interiors of the spinning rotor 12 and the guide body 4 leaves these interiors through the holes 27 in the bottom of the spinning rotor 12, while only a small amount of air remaining through the gap 28 between the spinning rotor 12 and the guide body 4 escapes.
  • the air flow leads the fibers 7 to the spinning rotor 12 from an opening device (not shown), where they are separated from a coating or stretching belt.
  • the fibers 7 After incidence on the inner wall 10 of the guide body 4, the fibers 7 are forced to move towards the spinning rotor 12 via this inner wall 10 due to centrifugal force.
  • they before they reach the inner wall 13 of the spinning rotor 12, they have to overcome the gap 28 between the spinning rotor 12 and the guide body 4.
  • the fibers 7 are exposed to the effect of the air flow escaping through this gap 28, so that the fibers 7 leaving the inner wall 10 of the guide body 4 suddenly change their direction of movement and incline to the circumferential direction, which in FIGS. 2 and 4 - for the sake of better definition - with angles A and B is indicated.
  • a section U (FIG. 3) is delimited on the path of movement S between the inner wall 10 of the guide body 4 and the inner wall 13 of the spinning rotor 12, where the fibers 7, the length of which is shorter than the length of the section U, come to a flight condition , ie to a state where no fiber part touches either the inner wall 10 of the guide body 4 or the inner wall 13 of the spinning rotor 12.
  • the end point of the section U of the movement path S of the fibers 7 bears the designation Z in FIGS. 2 to 4.
  • the size of the gap 28 between the spinning rotor 12 and the guide body 4 can also be set for the purpose of removing the short fibers 71 of a specific length. However, it has been found that this size can be set once and for all in some cases.
  • the short fiber 71 takes on its movement path S a first layer P1 on the inner wall 10 of the guide body 4, a second layer P2 in the section U - ie between the inner wall 10 of the guide body 4 and the inner wall 13 of the spinning rotor 12 - a third layer P3 in Gap 28 between the spinning rotor 12 and the guide body 4 and a fourth layer P4 in the interior of the air box 32.
  • the same layers P1, P2 and P3 of the short fiber 71 are shown in FIG. 3.
  • the longer fibers 72 (Fig. 4) are not removed, because they always on their movement path S either with the inner wall 10 of the guide body 4 or with the two inner walls 10 and 13 of the guide body and the spinning rotor 4, respectively. 12 or only in contact with the inner wall 13 of the spinning rotor 12. In this way, the longer fibers 72 are reliably mechanically retained as they pass through the gap 28 between the spinning rotor 12 and the guide body 4 against the effect of the air escaping through this gap 28.
  • the individual layers of one and the same fiber 72 are designated in FIG. 4 with symbols P11, P12 and P13.
  • the fibers 7 to be fed to the spinning rotor 12 thus become short fibers 71 from the fixed regimes of the rotational speeds of the spinning rotor 12 and the guide body 4 and the flow rate of those escaping through the gap 28 between the spinning rotor 12 and the guide body 4 Air of the appropriate length is discharged and removed, while the longer fibers 72 are subsequently straightened and, as a result of the centrifugal force and supporting guidance on the inner wall 13 of the spinning rotor 12, are supplied to the collecting channel 14 of the spinning rotor 12, where they are deposited in a known manner and of which they are continuously caused by the End of the formed and drawn yarn 9 are removed.
  • the sliver 1 is presented with a sliver of the material, the statistical staple length of which is unsuitable for the classic combing process - that is, most often because the proportion of short fibers 71 is too high - it is possible to do so Sorting raw material very effectively with the aid of the gap 28 between the spinning rotor 12 and the guide body 4, short fibers 71 being delivered from it, while the remaining longer fibers 72 can be spun into fine yarn 9.
  • This fiber material usually does not contain sufficiently fine fibers 7 in such an amount that it would be possible to spin very fine types of yarn from the remaining longer fibers 72. Nevertheless, 9 can be spun out of this yarn, which is at the edge of the range of fine worsted yarns - ie up to 10 tex.
  • the short fibers 71 delivered and accumulated in the filter device 43 can be used for other yarn or Assortments of goods are processed further. Since it is a very pure "waste", the short fibers 71 of the card are to be attributed and after stretching to a carded yarn range, both on a conventional open-end spinning unit with the spinning rotor and a guide body arranged upstream thereof the device according to the invention, to spin, provided that the operating parameters for the usual spinning process, in which no air escapes through the gap 28 between the spinning rotor 12 and the guide body 4, are set.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
EP90109364A 1988-12-14 1990-05-17 Dispositif pour la filature de fibres discontinues Withdrawn EP0456865A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS826288A CS274235B1 (en) 1988-12-14 1988-12-14 Device for staple fibres spinning

Publications (1)

Publication Number Publication Date
EP0456865A1 true EP0456865A1 (fr) 1991-11-21

Family

ID=5432986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90109364A Withdrawn EP0456865A1 (fr) 1988-12-14 1990-05-17 Dispositif pour la filature de fibres discontinues

Country Status (4)

Country Link
EP (1) EP0456865A1 (fr)
CS (1) CS274235B1 (fr)
DE (1) DE3935419A1 (fr)
IT (1) IT1238225B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107201575A (zh) * 2016-03-16 2017-09-26 索若德国两合股份有限公司 自由端转杯纺纱装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS274235B1 (en) * 1988-12-14 1991-04-11 Petr Blazek Device for staple fibres spinning
CZ279489B6 (cs) * 1991-12-18 1995-05-17 Rieter Ingolstadt Spinnereimaschinenbau Aktiengesellschaft Rotorové spřádací zařízení
SK177092A3 (en) * 1992-06-11 1995-02-08 Rieter Ingolstadt Spinnerei Device for supplying fibers into spinning rotor of open-end spinning machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3427811A1 (de) * 1983-08-08 1985-03-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Spinnvorrichtung in einer offenend-spinnmaschine
EP0301581A1 (fr) * 1987-07-31 1989-02-01 Kabushiki Kaisha Toyota Chuo Kenkyusho Unité de filage d'un métier à filer à bout libre
DE3730706A1 (de) * 1987-09-12 1989-03-23 Fritz Stahlecker Vorrichtung zum oe-rotorspinnen mit einem spinnrotor
DE3935419A1 (de) * 1988-12-14 1990-06-21 Vyzk Ustav Bavlnarsky Vorrichtung zum verspinnen von stapelfasern

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3427811A1 (de) * 1983-08-08 1985-03-28 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Kariya, Aichi Spinnvorrichtung in einer offenend-spinnmaschine
EP0301581A1 (fr) * 1987-07-31 1989-02-01 Kabushiki Kaisha Toyota Chuo Kenkyusho Unité de filage d'un métier à filer à bout libre
DE3730706A1 (de) * 1987-09-12 1989-03-23 Fritz Stahlecker Vorrichtung zum oe-rotorspinnen mit einem spinnrotor
DE3935419A1 (de) * 1988-12-14 1990-06-21 Vyzk Ustav Bavlnarsky Vorrichtung zum verspinnen von stapelfasern

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107201575A (zh) * 2016-03-16 2017-09-26 索若德国两合股份有限公司 自由端转杯纺纱装置
CN107201575B (zh) * 2016-03-16 2019-08-13 索若德国两合股份有限公司 自由端转杯纺纱装置

Also Published As

Publication number Publication date
DE3935419A1 (de) 1990-06-21
IT8922561A1 (it) 1991-05-30
CS274235B1 (en) 1991-04-11
CS826288A1 (en) 1990-09-12
IT8922561A0 (it) 1989-11-30
IT1238225B (it) 1993-07-12

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