EP0267621A1 - Offenend-Friktions-Spinnvorrichtung zur Herstellung eines Garnes oder dergleichen sowie Verfahren zur Herstellung eines Friktionsspinnmittels - Google Patents

Offenend-Friktions-Spinnvorrichtung zur Herstellung eines Garnes oder dergleichen sowie Verfahren zur Herstellung eines Friktionsspinnmittels Download PDF

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Publication number
EP0267621A1
EP0267621A1 EP87116746A EP87116746A EP0267621A1 EP 0267621 A1 EP0267621 A1 EP 0267621A1 EP 87116746 A EP87116746 A EP 87116746A EP 87116746 A EP87116746 A EP 87116746A EP 0267621 A1 EP0267621 A1 EP 0267621A1
Authority
EP
European Patent Office
Prior art keywords
friction
coating
hole
friction spinning
holes
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Withdrawn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
EP87116746A
Other languages
German (de)
English (en)
French (fr)
Inventor
Herbert Stalder
Urs Keller
Emil Briner
Werner Oeggerli
Arthur Würmli
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter 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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0267621A1 publication Critical patent/EP0267621A1/de
Withdrawn legal-status Critical Current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
    • D01H4/16—Friction spinning, i.e. the running surface being provided by a pair of closely spaced friction drums, e.g. at least one suction drum
    • D01H4/18—Friction drums, e.g. arrangement of suction holes

Definitions

  • the present invention relates to an open-end friction spinning device for producing a yarn or the like by means of open-end friction spinning with two friction spinning means that can be moved relative to one another and form a gusset, at least one of which is provided with a coating that forms a friction surface and holes for has the passage of an air stream, the hole cross-section of which is smaller than 0.28 mm 2, with a fiber conveying channel running between a fiber ribbon dissolving roller and the at least one perforated friction spinning means for the pneumatic transport of the fibers onto the friction surface, a yarn formation point on the friction surface in the gusset between the two friction spinning means and a yarn withdrawal device for withdrawing the yarn from the yarn formation point and a method for producing a frik tion spinning means for the aforementioned open-end friction spinning device, in which the friction spinning means is perforated for the passage of air and the coating is applied to form the friction surface.
  • a known open-end friction spinning device of the type described above has a friction spinning drum with continuous, cylindrical holes, the drum body having a coating on its outer surface.
  • the holes have a diameter of 0.6 mm, which can be up to 0.75 mm, but at least 0.5 mm must be large (e.g. DE-OS 3'114'093).
  • the holes are drilled mechanically in a cylindrical shape, which can be done with a conventional drill. It is known that a smaller diameter would be advantageous for better prevention of the passage of fibers.
  • the present invention is intended to provide a method for producing a friction spinning means with which perforations in the friction surface can be produced inexpensively and which are intended to meet the above requirements for open-end friction spinning.
  • the open-end friction spinning device of the type described at the outset is characterized in that the holes, viewed in the direction of the air flow, have a hole cross section at the mouth of the friction surface which forms the narrowest opening of the hole and is less than 0.283 mm2, but at least 0. 07 mm2 and that the coating extends into the holes and the thickness of the coating is at least 0.05 mm.
  • This configuration of the holes allows the coating to be used in a targeted manner in accordance with the invention in order to narrow the initially oversized hole.
  • the hole can first be formed or drilled using conventional means and only then be made smaller when the coating is applied.
  • the open-end friction spinning device makes it difficult to suck in fibers, in particular the beginning of the fibers thereof, if not avoided, because the hole area in the narrowest hole cross section of the holes in the friction area is sufficiently small will hold.
  • a hole area of less than 0.283 mm2 corresponds to a hole diameter of less than 0.6 mm for a cylindrical hole, for example.
  • the open-end friction spinning device according to the invention ensures that the hole cross-section of less than 0.283 mm 2 makes it at least more difficult for the fibers to slip into the hole mouth.
  • the coating advantageously extends only over part of the hole depth into the respective hole. What is advantageously achieved by the coating is that the hole cross section widens away from the junction in the air flow direction. This favors a diffusion-like expansion of the air, which flows into the holes in the friction surface, so that the flow through the holes is favored. Another advantage of this hole expansion is that a dirt particle that has penetrated into the hole does not get caught in the hole as a result of the expansion.
  • the air flow is preferably generated through the holes in the friction surface on its mouth side of the friction spinning means facing away from the friction surface by means of an air suction device that can be connected to it.
  • At least one of the friction means is in the form of a hollow friction spinning drum, the outer surface of which has the friction surface with the holes.
  • the friction surface is there preferably on the outer surface of the friction spinning drum.
  • the friction surface can also be on the inside of a drum, as shown in DE-OS 2'919'316.
  • one of the two friction spinning means can be a friction spinning disc, one disc surface of which is present as a friction surface with the holes.
  • the holes are preferably cylindrical with a hole diameter of less than 0.6 mm, but of at least 0.3 mm, but they can also have a different geometric shape in their cross section, for example, be angular. Further advantageous embodiments are listed in the claims.
  • through-holes are first formed in the friction spinning means with a hole width that is larger than a predetermined end hole width after the coating. Then the perforated edges, as seen in the air flow direction, are deburred at least at the hole opening and then the coating is carried out to the predetermined hole cross section, which is less than 0.283 mm 2, but at least 0.07 mm 2, at the mouth of the hole on the friction surface of the friction spin material. Deburring can be carried out by the slurry blasting method known per se.
  • a first layer is preferably applied galvanically and then a second layer by the plasma process or by vapor deposition.
  • the open-end friction spinning device which is known per se and is shown here only in its essential parts, has a opening roller 1 known from the rotor open-end spinning process, which is rotatably mounted in a housing 2 and in the direction of Arrow A can be driven (only partially shown).
  • the opening roller 1 has needles 3 with which a fiber sliver is dissolved into individual fibers in a manner known per se.
  • teeth (not shown) can also be present instead of the needles 3.
  • a fiber conveying channel 5 is connected to a fiber outlet opening 4 of the housing 2 and extends between the fiber ribbon dissolving roller 1 and a friction spinning means designed as a friction spinning drum 6.
  • the friction spinning drum 6 is perforated through holes 7 and has a suction channel 8 in its interior, which delimits a suction zone R on the circumference of the friction spinning drum 6 through walls 9 and 10.
  • the walls 9 and 10 extend close to the cylindrical inner wall of the friction spinning drum 6, so that an inflow of false air is prevented as far as possible without touching the inner wall.
  • the suction duct 8 is connected to an air suction device 11 and generates the conveying air flow in the fiber conveying duct.
  • the free-floating fibers 12 detached from the needles 3 and indicated in the feed channel 5 by arrows in the fiber channel 5 are held within the suction zone 5 on the surface part of the rotating friction drum 6 delimited by the mouth 13 of the feed channel 5 by means of the air stream.
  • the fibers 12 are twisted in at a yarn formation point 14 located on the friction drum 6, which is located in the region of the gusset or wedge 15 which is located between the outer surface 16 the friction spinning drum 6 and a lateral surface 17 of a further friction spinning drum 18.
  • the friction spinning drum 6 rotates in the direction of arrow C, and an unperforated friction spinning drum 18, which together with the drum 6 forms the gusset 15, rotates in the direction of arrow D when the fibers 12 are deposited on the lateral surface 16 of the friction spinning drum 6 the front end of the same is held on the surface 16 designed as a friction surface, while the rear fiber ends still in the air flow in the fiber conveying channel 5 are flipped by the air flow against the direction of withdrawal of the yarn, as is the case for a fiber 12a representing the fibers 12 in FIG. 1 is shown.
  • the finished yarn 19 is drawn off by a pair of take-off rollers 20 of a take-off device in the direction of arrow E, which is located on one end face 21 of the friction spinning drum 6.
  • a take-off device with a pair of draw-off rollers 20a can also be arranged on the other end face 22 of the friction spinning drum 6.
  • the device shown in FIGS. 1 and 2 is dubbed, for example, in published EP patent application No. 0175826 (corresponding to EP patent application No. 85,108,613.2, filed on July 10, 1985, and d "Method and device for producing a Garnes "), which is why reference is made to this document.
  • the second friction spinning drum 18 can also be perforated in the same way as the friction spinning drum 6.
  • the outer surface 16 is formed by a coating 23 (Fig. 2 and 3), which the friction surface results and extends over the hole edge 24 over part of the hole depth F into the holes 7, as shown in FIG. 3.
  • the holes 7 are drilled through a jacket 25 forming the high friction spinning drum with a diameter G which is larger, for example at least 0.1 mm larger than a hole diameter H after the coating at the hole mouth 27.
  • the coating or layer 23, whose thickness B is at least 0.05 mm the hole diameter H is then reduced to less than 0.6 mm or 0.283 mm2.
  • the constriction is built up differently than in the case of a galvanic process, but here, too, the hole diameter is narrowed by the order of twice the thickness of the coating in the direction perpendicular to the surface of the screen drum.
  • Such intermediate layers can consist of copper and nickel, for example.
  • the deburring of the drilled holes 7, especially the hole edges 24, respectively. 24a is preferably carried out by the slurry jet method and Ely polishing known per se.
  • the coating 23 can be applied galvanically or be a plasma or vapor deposition layer. In the holes 7, the thickness B of the coating 23 decreases along the hole depth F, so that the hole diameter H and thus the hole width, as seen in the ventilation flow direction K, increases to the hole diameter G. This favors both the removal of suctioned-up impurities and the passage of air.
  • the hole depth F is at least 0.6 mm.
  • a friction spinning means 28 with a jacket 29, in which bores 30 are made.
  • the holes 30 are preferably by the Schlemmstrahlmaschine on their edges 31, respectively. 31 a, deburred.
  • the edge 31 lies at the mouth 32 of the bores 30 on the side 33 of the wall 29 on which a fiber feed channel, for example the fiber feed channel 5, opens out.
  • a galvanically applied coating 34 extends over the edges 31 into the bore 30 and, for known reasons, forms a deposit 35 on the edges 29 which is higher than the layer thickness B, away from the edge 31.
  • a second layer 36 which can be a plasma or evaporating layer and which forms a friction surface.
  • This second layer can consist, for example, of aluminum oxide or nickel diamond.
  • the raised shelf 35 is enlarged, so that, while reducing the diameter L of the bores 30, a hole 37 is formed with an opening 38 on the second layer 36 and thus on the friction surface with a hole diameter J that is less than 0.283 mm2 and smaller than the hole diameter G, but at least 0.07 mm2.
  • the layer thickness B relates to the first layer 34 and the second layer 36 together and is at least 0.05 mm.
  • Both layers penetrate into the hole 30, the degree of penetration being essentially given by the galvanic process.
  • the layer thickness B should be at least 0.05 mm.
  • the penetration of fibers into the hole 37 can be prevented by the aforementioned hole width when air flows through the holes 37 in the direction of arrow M.
  • the friction spinning means 28 according to FIG. 4 can be present on the open-end friction spinning device according to FIGS. 1 and 2 instead of the friction spinning drum 6 described there.
  • a friction spinning disc 40 is rotatably mounted by means of a shaft 41 and can be driven in the direction of arrow N. Fibers 43 delivered by a fiber conveying channel 42 become spinning from the friction disc 40 taken over and promoted to a yarn formation point 44 which lies in the gusset 45 between the jacket 46, a tapered roller 47 and the friction spinning disc 40. Finished yarn 48 is drawn off from the yarn formation point 44 by a pair of take-off rollers 49.
  • the friction spinning disc 40 has through holes 50 and is provided with a coating 51 as a friction surface.
  • a suction channel 53 is arranged on the underside 52 of the friction spinning disc 40, as viewed in the direction of FIG. 5, which extends in an area from the mouth 54 of the fiber conveying channel 42 to and with the yarn formation point 44.
  • the suction channel 53 is connected to a suction device, not shown, so that air flows through it in the direction of arrow P and thus also through the holes 50.
  • the coating 51 extends into the holes 50 so that the holes 50 have a clear width analogous to H in FIG. 3 or J in FIG. 4 of less than 0.283 mm 2 and of at least 0.07 mm2.
  • the thickness B of the coating is at least 0.05 mm.
  • the invention is not restricted to cylindrical hollow drums, as described with reference to FIGS. 1 and 2, or to disks, as described with reference to FIG. 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP87116746A 1986-11-13 1987-11-12 Offenend-Friktions-Spinnvorrichtung zur Herstellung eines Garnes oder dergleichen sowie Verfahren zur Herstellung eines Friktionsspinnmittels Withdrawn EP0267621A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4544/86 1986-11-13
CH454486 1986-11-13

Publications (1)

Publication Number Publication Date
EP0267621A1 true EP0267621A1 (de) 1988-05-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116746A Withdrawn EP0267621A1 (de) 1986-11-13 1987-11-12 Offenend-Friktions-Spinnvorrichtung zur Herstellung eines Garnes oder dergleichen sowie Verfahren zur Herstellung eines Friktionsspinnmittels

Country Status (4)

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US (2) US4901518A (enrdf_load_html_response)
EP (1) EP0267621A1 (enrdf_load_html_response)
JP (1) JPS63135523A (enrdf_load_html_response)
IN (1) IN170278B (enrdf_load_html_response)

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
US5104678A (en) * 1990-05-23 1992-04-14 The Procter & Gamble Company Low saturate frying oil with meat flavor
CN104651989A (zh) * 2015-01-28 2015-05-27 南通新源特种纤维有限公司 纺纱辊
CN104711647B (zh) * 2015-01-28 2017-05-31 南通新源特种纤维有限公司 纺纱辊的加工方法
CN104711650B (zh) * 2015-01-28 2017-07-14 南通新源特种纤维有限公司 无缝钢管的电镀方法
CN104726973B (zh) * 2015-01-28 2017-07-25 南通新源特种纤维有限公司 摩擦纺纱机用筛网
CN104611792A (zh) * 2015-01-28 2015-05-13 南通新源特种纤维有限公司 纺纱辊的加工方法
DE102017222107B4 (de) * 2017-12-07 2019-10-31 Leoni Bordnetz-Systeme Gmbh Verfahren sowie Vorrichtung zur Herstellung einer Leitung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798136A (en) * 1972-06-09 1974-03-19 Ibm Method for completely filling small diameter through-holes with large length to diameter ratio
CS209209B1 (en) * 1978-05-17 1981-11-30 Stanislav Didek Method of yarn friction spinning based on spinning with open end and apparatus used for execution of the said method
GB2042599B (en) * 1978-10-26 1983-09-21 Platt Saco Lowell Ltd Open-end spinning apparatus
US4358922A (en) * 1980-04-10 1982-11-16 Surface Technology, Inc. Metallic articles having dual layers of electroless metal coatings incorporating particulate matter
US4358923A (en) * 1980-04-10 1982-11-16 Surface Technology, Inc. Composite coatings for open-end machinery parts
DE3114093C2 (de) * 1980-04-19 1986-06-05 Hollingsworth (U.K.) Ltd., Accrington, Lancashire Walze für eine Friktionsspinnvorrichtung
IN164144B (enrdf_load_html_response) * 1984-05-18 1989-01-21 Rieter Ag Maschf
IN165403B (enrdf_load_html_response) * 1984-09-25 1989-10-07 Rieter Ag Maschf

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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US4901518A (en) 1990-02-20
IN170278B (enrdf_load_html_response) 1992-03-07
US4968525A (en) 1990-11-06
JPS63135523A (ja) 1988-06-07

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Inventor name: KELLER, URS