EP3730681A1 - Système d'étirage à lanières - Google Patents

Système d'étirage à lanières Download PDF

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Publication number
EP3730681A1
EP3730681A1 EP20170503.5A EP20170503A EP3730681A1 EP 3730681 A1 EP3730681 A1 EP 3730681A1 EP 20170503 A EP20170503 A EP 20170503A EP 3730681 A1 EP3730681 A1 EP 3730681A1
Authority
EP
European Patent Office
Prior art keywords
apron
bridge
drafting
drafting device
roller
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Withdrawn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
EP20170503.5A
Other languages
German (de)
English (en)
Inventor
Karoline Günther
Philipp Schiffers
Chandrassekaran Seshayer
Ralf Siewert
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.)
Saurer Intelligent Technology AG
Original Assignee
Saurer Intelligent Technology 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 Saurer Intelligent Technology AG filed Critical Saurer Intelligent Technology AG
Publication of EP3730681A1 publication Critical patent/EP3730681A1/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Withdrawn legal-status Critical Current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
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/44—Adjusting drafting elements, e.g. altering ratch
    • 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
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • 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
    • 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
    • D01H5/74—Rollers or roller bearings
    • 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
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements

Definitions

  • the invention relates to an apron drafting system for a spinning machine, in particular an air-jet spinning machine, with a lower apron guided over a drivable lower roller, which is supported in the area of a draft zone, in particular a main draft zone, by a sliding section of a apron bridge.
  • Drafting systems for spinning machines are known in a wide variety of configurations from the prior art. They are used to stretch or distort a sliver, which causes a reduction in the cross-section of the fibers. During the warping, fibers must be shifted next to one another as evenly as possible in order to achieve a uniform sliver, which is a prerequisite for producing a uniform yarn.
  • the drafting devices generally have a plurality of pairs of rollers arranged one after the other, which, arranged lying next to one another, clamp the sliver running between them.
  • a pair of rollers usually consists of a driven lower roller and an upper pressure roller resting against the lower roller.
  • a distortion of the sliver is achieved in that in the direction of transport of the sliver determined by the direction of rotation of the roller pairs, the peripheral speed increases from roller pair to roller pair.
  • the drafting units As apron drafting units of the type mentioned above, in which the fiber sliver is guided through aprons between the clamping lines of the two drafting roller pairs becomes.
  • double apron drafting units are particularly widespread, in which, in the area of the main drafting zone, an apron is guided around a first upper and lower roller, which is deflected towards the second pair of rollers by a deflection device from the fiber guiding direction into the return direction, so that the sliver is between the upper and lower rollers. and lower apron is performed.
  • the belts designed as an endless belt are guided at least around the drivable lower roller, a deflection device and a tensioning device which holds the lower apron to the pretensioning required for operation.
  • the lower apron can be driven via the drivable lower roller, the transmission of the drive torque from the roller to the apron usually being ensured via a frictional connection with an upper apron or an upper roller.
  • the fiber guidance of the sliver or the draft quality is essential for the yarn quality, with a uniformly spun yarn being achieved by an even draft of the sliver. Due to the main distortion in a apron drafting system in the area of the apron guide, proper guidance in this area is of crucial importance. From the EP 2 034 060 it is already known to ensure guidance through a strap tensioning device with a tensioning arm and a loading device. However, this apron tensioning device has the disadvantage that it leads to a loss of drive power.
  • the invention is based on the object of providing a apron drafting system in which reliable guidance of the lower apron is ensured while maintaining a high drive power.
  • the invention achieves the object by means of a strap drafting device with the features of claim 1.
  • Advantageous further developments of the invention are given in the dependent claims.
  • the apron bridge for guiding the apron has a line section with guide means for the lateral guidance of the lower apron surrounding the apron bridge.
  • the lower apron guided around the drivable lower roller is supported by the apron bridge, which prevents the lower apron from being able to give way downwards, particularly in the area of the main drafting zone.
  • the lower apron is guided over a sliding section of the apron bridge on which the lower apron is supported in the area of the draft zone.
  • the apron bridge furthermore has a line section which is provided with guide means which serve for the lateral guidance of the lower apron surrounding the apron bridge.
  • the guide means ensure that the lower apron is held centrally in an area deviating from the sliding section, so that the lower apron is reliably prevented from running away to the side, which would lead to a loss of quality in the yarn to be produced.
  • the formation of the line section on the apron bridge makes it possible to dispense with additional components, so that the apron stretching system is particularly simple and inexpensive can be produced.
  • the guide means laterally guiding the lower apron ensure minimal friction, so that a loss of drive power is excluded or minimized.
  • the design of the guide means on the apron bridge also makes it possible to dispense with separate guide devices, which would increase the complexity of the apron drafting system.
  • the apron stretching device according to the invention is thus characterized by its simplicity and compactness, which makes it possible to ensure that the lower apron rotates reliably even without a device for tensioning the lower apron, with manufacturing tolerances of the lower apron not affecting the function negatively.
  • the design of the guide means for guiding the lower apron is basically freely selectable. According to a particularly advantageous embodiment of the invention, however, it is provided that the apron bridge has two guide webs which are arranged at a distance from one another and laterally surround the lower apron in the region of the line section.
  • guide webs are characterized in that they can be formed in a particularly simple manner on the apron bridge. These are arranged in any area of the apron bridge in such a way that they laterally enclose a lower apron running around the apron bridge and thus prevent the lower apron from giving way to the side.
  • the guide webs can, for example, be designed as one-piece pegs formed with the apron bridge, the distance between which essentially corresponds to the width of the circumferential lower apron.
  • the power section formed by the guide webs can be formed at any point on the apron bridge, this being particularly preferably arranged on an underside of the apron bridge opposite the sliding section in the return area of the lower apron.
  • the design of the guide webs can be freely selected.
  • they can be made of a special ceramic material or plastic material that has a low coefficient of friction for the circumferential lower apron.
  • the guide webs have a sliding coating in the contact area with the lower apron.
  • the guide webs can basically connect directly to an underside of the apron bridge. According to a particularly advantageous embodiment of the invention, however, it is provided that the guide webs are arranged on a stabilization web which runs on the apron bridge in an area opposite the sliding section.
  • the use of a stabilizing web increases the strength of the apron bridge in a complementary way and thus ensures particularly reliably that the circumferential lower apron is adequately supported.
  • the use of the stabilization bar offers the possibility of a particularly reliable arrangement of the guide bars, so that reliable operation is guaranteed.
  • the apron bridge can be adjusted in a corresponding manner on the drafting device carriage stored on which, inter alia, the lower roller and the lower apron are arranged.
  • An adjustment movement of the apron bridge transversely to the running direction of the sliver can also be achieved by the fact that the entire drafting device slide is mounted on the apron drafting unit in an adjustable manner transversely to the running direction of the sliver.
  • the traversing movement of the apron bridge can also cause the Nitschel effect on the fiber structure, which has a positive influence on the tear strength of the roving and the yarn, after the individual fibers in the roving occupy a denser and less ordered position, so that the contact areas are enlarged and the tensile strength of the roving increases accordingly.
  • the apron bridge relative to the drafting device carriage and / or the drafting device carriage of the drafting device can be adjusted in its entirety transversely to the running direction of the sliver.
  • the apron bridge and / or the drafting device carriage is connected to an adjustment drive for adjusting the apron bridge relative to the drafting device carriage and / or the drafting device carriage transversely to the circumferential direction of the lower apron.
  • the adjustment drive can therefore be used to comfortably adjust the apron bridge relative to the drafting device slide or the drafting device slide relative to the apron drafting device, so that the lower apron is moved sideways to and fro by shifting the line section.
  • the use of an adjusting drive enables the traversing speed, which is decisive for the quality of the process, to be optimally adapted to the sliver to be drawn.
  • An excessively high traversing speed, which leads to a reduction in the strength of the roving, can thus be reliably avoided, with the traversing width, which is also decisive for the quality of the process, being able to be reliably determined via the adjusting drive in addition to the traversing speed.
  • the adjustment drive thus allows an optimal adjustment of the traverse width and traverse speed, so that this does not result in any loss of quality in the roving, but at the same time wear of the lower apron is significantly reduced compared to a non-traversing movement.
  • the adjustment drive is connected to a control device for determining the adjustment movement of the drafting device carriage and / or the apron bridge, in particular for determining the adjustment length and the adjustment frequency.
  • FIG 1 a perspective view of a roller pair arrangement 1 of an apron drafting device which can be assigned to a spinning station (not shown here) of a textile machine and which can be fixed to the textile machine.
  • the roller pair arrangement 1 has four first to fourth upper rollers 23, 24, 25, 26 arranged one behind the other in the direction of a fiber sliver, not shown here, running through the roller pair arrangement 1, which are opposite corresponding, drivable first to fourth lower rollers 3, 4, 5, 6 .
  • the first to fourth lower rollers 3, 4, 5, 6 include the infeed roller 3 which first comes into contact with the sliver and which can be driven via a roller drive and represents the first lower roller of the roller pair arrangement 1.
  • the infeed roller 3 can be arranged together with the roller drive on a first drafting device carriage 8a.
  • the first 4 and second drafting roller 5 can each be coupled to their own roller drive, which can also be arranged on the corresponding second 8b or third drafting device carriage 8c.
  • the second drafting roller 5 does not come into direct contact with one to be drafted Sliver, but rather has a lower apron 10 which runs around the drafting roller 5 and comes into contact with the sliver.
  • the lower apron 10 is designed as an endless belt and, in addition to the second drafting roller 5, also runs around an apron bridge 9 arranged on supports 11a, 11b of the third drafting device carriage 8c, the supports 11a, 11b being arranged on a base body 17.
  • the lower apron 10 rests against a sliding section 22 of the apron bridge 9 facing the lower apron 10.
  • the lower apron 10 is supported via the sliding section 22 so that the lower apron 10 cannot move in the direction of the third drafting device carriage 8c (cf. Figures 2 and 3 ).
  • the apron bridge 9 On the side opposite the sliding section 22, the apron bridge 9 has two guide webs 13 protruding from an underside at a distance from one another, forming a line section 18, which serve as guide means for the lower apron 10 adjacent to the lower apron 10.
  • the guide webs 13 adjoin a web 12 arranged on the underside in the longitudinal axis direction of the apron bridge 9, which stabilizes the apron bridge 9.
  • the apron bridge 9 itself is slidably mounted on the support 11a and in a receptacle 14 of the support 11b so that the apron bridge 9 can be adjusted transversely to the grain direction or to the direction of the lower apron 10 via an adjustment drive, not shown here.
  • a traversing movement of the lower apron 10 can thus be brought about via the guide webs 13 resting on the lower apron 10, a control device, not shown here, connected to the actuator setting the traverse speed and the traverse width.
  • the fiber sliver stretched in the roller pair arrangement 1 passes via an outlet roller 6, which is arranged on a fourth drafting device carriage 8d, into a spinning unit, not shown here, which adjoins the drafting device 1.
  • the arrangement of the first to fourth drafting device carriages 8a, 8b, 8c, 8d can take place on a frame (not shown) of the apron drafting device by means of suitable fastening receptacles.
  • the adjustment of the third drafting device carriage 8c can take place according to a preferred embodiment by means of an adjustment drive, whereby the adjustment of the third drafting device carriage 8c can preferably be guided via at least one elongated hole and a guide element protruding into it.
  • an elongated hole which can be provided in the drafting system slide for fine adjustment of its position and which can be provided in a simple manner for the traversing movement of the drawing system slide can be used.
  • Such designed drafting device carriages can consequently be used optionally for an apron drafting device with or without a traversing movement of the lower apron.
  • more than one elongated hole can particularly preferably be provided.
  • the lower apron is, in addition or as an alternative to the arrangement shown, in a main drafting zone in the same or a similar manner in a so-called pre-drafting zone, which is connected upstream of the main drafting zone in the transport direction of the sliver and between two pairs of rollers in the transport direction of the sliver with one another different rotational speed is formed.
  • the lower apron can preferably be traversed in an identical or similar manner.

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)
EP20170503.5A 2019-04-26 2020-04-21 Système d'étirage à lanières Withdrawn EP3730681A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019110881.0A DE102019110881A1 (de) 2019-04-26 2019-04-26 Riemchenstreckwerk

Publications (1)

Publication Number Publication Date
EP3730681A1 true EP3730681A1 (fr) 2020-10-28

Family

ID=70390812

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20170503.5A Withdrawn EP3730681A1 (fr) 2019-04-26 2020-04-21 Système d'étirage à lanières

Country Status (7)

Country Link
US (1) US20200340148A1 (fr)
EP (1) EP3730681A1 (fr)
JP (1) JP2020183607A (fr)
CN (1) CN111850750A (fr)
BR (1) BR102020008137A2 (fr)
DE (1) DE102019110881A1 (fr)
MX (1) MX2020004275A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023217322A1 (fr) 2022-05-11 2023-11-16 ITA Technologietransfer GmbH Banc d'étirage, machine de traitement de fibres à banc d'étirage et procédé pour faire fonctionner un banc d'étirage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU102828B1 (de) * 2021-06-10 2022-12-12 Saurer Spinning Solutions Gmbh & Co Kg Oberriemchenhalter für ein Riemchenstreckwerk einer Textilmaschine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE662625C (de) * 1937-03-12 1938-07-18 Spinnereimaschb Akt Ges Deutsc Riemchenstreckwerk
DE1176033B (de) * 1962-03-24 1964-08-13 Schubert & Salzer Maschinen Doppelriemchenstreckwerk
JPS5787074U (fr) * 1980-11-18 1982-05-28
US4391021A (en) * 1981-10-19 1983-07-05 Whitin Roberts Company Apron drafting system
DE10217669A1 (de) * 2002-04-19 2003-10-30 Lakshmi Machine Works Ltd Vorrichtung zum Verdichten eines verstreckten Faserverbandes
EP1801270A1 (fr) * 2005-12-19 2007-06-27 Rovira Trias, Juan Dispositif pour guider de corroie inferiere dans des bancs d'etirage
EP2034060A1 (fr) 2007-09-10 2009-03-11 Maschinenfabrik Rieter Ag Machine textile dotée d'un banc d'étirage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122881C2 (de) * 1991-07-11 2002-01-10 Schurr Stahlecker & Grill Riemchentisch für ein Streckwerk
DE4227490A1 (de) * 1992-08-20 1994-02-24 Fritz Stahlecker Spinnmaschine mit Riemchenstreckwerken
CN1056205C (zh) * 1996-03-25 2000-09-06 丰和工业株式会社 三列式牵伸装置
DE20221912U1 (de) * 2002-11-11 2009-06-10 Spindelfabrik Suessen Gmbh Spinnmaschine mit Verdichtungseinrichtung
DE202004021697U1 (de) * 2004-05-31 2010-08-12 Marzoli S.P.A., Palazzolo Sull'oglio Doppelriemchen-Zieh- bzw. -Streckwerk für eine Spinnmaschine
JP2012132105A (ja) * 2010-12-20 2012-07-12 Toyota Industries Corp 紡機におけるドラフト装置
JP6164190B2 (ja) * 2014-10-10 2017-07-19 株式会社豊田自動織機 紡機における特殊糸製造装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE662625C (de) * 1937-03-12 1938-07-18 Spinnereimaschb Akt Ges Deutsc Riemchenstreckwerk
DE1176033B (de) * 1962-03-24 1964-08-13 Schubert & Salzer Maschinen Doppelriemchenstreckwerk
JPS5787074U (fr) * 1980-11-18 1982-05-28
US4391021A (en) * 1981-10-19 1983-07-05 Whitin Roberts Company Apron drafting system
DE10217669A1 (de) * 2002-04-19 2003-10-30 Lakshmi Machine Works Ltd Vorrichtung zum Verdichten eines verstreckten Faserverbandes
EP1801270A1 (fr) * 2005-12-19 2007-06-27 Rovira Trias, Juan Dispositif pour guider de corroie inferiere dans des bancs d'etirage
EP2034060A1 (fr) 2007-09-10 2009-03-11 Maschinenfabrik Rieter Ag Machine textile dotée d'un banc d'étirage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023217322A1 (fr) 2022-05-11 2023-11-16 ITA Technologietransfer GmbH Banc d'étirage, machine de traitement de fibres à banc d'étirage et procédé pour faire fonctionner un banc d'étirage

Also Published As

Publication number Publication date
CN111850750A (zh) 2020-10-30
DE102019110881A1 (de) 2020-10-29
MX2020004275A (es) 2020-10-28
BR102020008137A2 (pt) 2020-12-29
JP2020183607A (ja) 2020-11-12
US20200340148A1 (en) 2020-10-29

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