EP0392949A1 - Drehbarer und hohler Faserverdichter und Verfahren zu dessen Herstellung - Google Patents

Drehbarer und hohler Faserverdichter und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP0392949A1
EP0392949A1 EP90420186A EP90420186A EP0392949A1 EP 0392949 A1 EP0392949 A1 EP 0392949A1 EP 90420186 A EP90420186 A EP 90420186A EP 90420186 A EP90420186 A EP 90420186A EP 0392949 A1 EP0392949 A1 EP 0392949A1
Authority
EP
European Patent Office
Prior art keywords
condenser
diameter
tube
radial
guide surface
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Withdrawn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
EP90420186A
Other languages
English (en)
French (fr)
Inventor
Bernard Isoard
Christophe Apard
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.)
Devtex
Original Assignee
Devtex
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 Devtex filed Critical Devtex
Publication of EP0392949A1 publication Critical patent/EP0392949A1/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Withdrawn legal-status Critical Current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
    • 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 invention relates to a new hollow rotary spinning condenser; it also relates to a process for manufacturing it.
  • Rotary hollow spinning condensers are well known. There is therefore no need here to describe them in detail.
  • this device comprises on the outside a guide surface, most generally flat, intended to receive the fibers to be guided, and which has a plurality of contiguous orifices of defined diameter, formed in the very thickness of the guide surface. Such orifices connect this surface to the hollow core of the condenser, so that under the effect of a suction, the fibers are applied to the guide surface.
  • Such devices are described for example in European patents 0 085 017 and 0 162 787 of the Applicant (corresponding to American patents no. 4,488,397 and 4,584,830).
  • the orifices are approximately 0.5 mm in diameter and are regularly spaced continuously with a center distance of approximately 3 mm.
  • EDM electronic medical record
  • these machining techniques do not allow perfect control of the internal surface condition of the holes. In this way, the fibers which often tend to penetrate the holes catch on and eventually form plugs which can seal these holes.
  • the invention overcomes these drawbacks. It relates to a spinning condenser of the type in question which is economical, does not require the use of sophisticated drilling techniques, but only conventional techniques, and above all which does not have the defects listed above.
  • This hollow rotary spinning condenser comprising on the outside a guide surface intended to receive the fibers, having a plurality of contiguous radial orifices of defined diameter, formed in the thickness of the guide surface, connecting said guide surface at the hollow core of the condenser, intended to be connected in turn to a source of vacuum, is characterized in that each radial orifice comprises a first hole of diameter greater than that of the orifice itself, into which a force is inserted radial tube whose internal diameter corresponds to that of the orifice of defined diameter.
  • the tube inserted into each hole is an extruded mini-tube, at least the edge of which is inside the condenser is rounded;
  • the tube inserted into each hole is an extruded mini-tube whose length is greater than the thickness of the guide surface; advantageously the inserted tube has a length of two to five times the thickness of the guide surface;
  • the tube and the condenser are made of the same metal, for example an aluminum metal or steel; -
  • the ratio between the length of the characteristic tubes on the internal diameter of these tubes is as high as possible and advantageously at least equal to ten (10), which economically is hardly feasible in machining.
  • the invention also relates to a method for producing such a condenser.
  • This process for arranging a plurality of contiguous orifices in the thickness of the guide surface of a hollow rotary spinning condenser is characterized in that it consists: - first of all, to pierce in this thickness a plurality of radial holes of a first diameter; - Then, to force insert into these radial holes portions of deburred tube whose external diameter corresponds at least to the diameter of the radial holes and whose internal diameter corresponds to the desired diameter for the orifice.
  • the condenser characteristic of the invention designated by the general reference (1) is made of an aluminum alloy, for example type AU 4 G.
  • This condenser (1) of generally cylindrical shape essentially comprises a planar external guide surface (2 ), intended to receive the fibers and which has on the surface at least two rows respectively (3) and (4) of contiguous radial holes (5), arranged on circumferences and staggered with respect to each other.
  • the outside diameter of the condenser is 50 mm over a width of 20 mm and the thickness of the guide surface (2) is 1.5 mm.
  • the core (6) of the condenser (1) is hollow. By a suitable means known and not shown during operation, is applied in this core (6) a vacuum of between 5,000 and 30,000 pascals.
  • This extruded mini-tube (10) has an external diameter of 1.50 mm and an internal diameter of 0.5 mm for a length of 5.0 mm.
  • the outer end (12) of these mini-tubes which is flush with the guide surface (2) is flat, while the inner end (11) has a rounded edge.
  • the length of these radial mini-tubes can vary within wide limits. It suffices that their respective ends (11) do not touch.
  • the invention makes it possible to produce spinning condensers of the type in question more economically, since it is no longer necessary to use sophisticated techniques and to deburr the outlet orifices.
  • the surface condition of the extruded mini-tubes being smooth, the attachment defects are eliminated.
  • the formation of flanges and plugs is avoided.

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)
EP90420186A 1989-04-14 1990-04-12 Drehbarer und hohler Faserverdichter und Verfahren zu dessen Herstellung Withdrawn EP0392949A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8905239 1989-04-14
FR8905239A FR2645880A1 (de) 1989-04-14 1989-04-14

Publications (1)

Publication Number Publication Date
EP0392949A1 true EP0392949A1 (de) 1990-10-17

Family

ID=9380933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90420186A Withdrawn EP0392949A1 (de) 1989-04-14 1990-04-12 Drehbarer und hohler Faserverdichter und Verfahren zu dessen Herstellung

Country Status (3)

Country Link
EP (1) EP0392949A1 (de)
JP (1) JPH02136067U (de)
FR (1) FR2645880A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109295567B (zh) * 2018-11-21 2021-07-09 东华大学 一种提高紧密纺纱线性能的装置及方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB749750A (en) * 1952-10-10 1956-05-30 Johnson Matthey Co Ltd Improvements in and relating to spinnerets
EP0129367A2 (de) * 1983-06-16 1984-12-27 Toa Nenryo Kogyo Kabushiki Kaisha Spinnplatte für das Schmelzspinnen und Verfahren zur Herstellung derselben
GB2152958A (en) * 1984-01-21 1985-08-14 Reiners Verwaltungs Gmbh Method and apparatus for spinning fibre formation
GB2152957A (en) * 1984-01-21 1985-08-14 Brockmanns K J Method and apparatus for spinning fibre formation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB749750A (en) * 1952-10-10 1956-05-30 Johnson Matthey Co Ltd Improvements in and relating to spinnerets
EP0129367A2 (de) * 1983-06-16 1984-12-27 Toa Nenryo Kogyo Kabushiki Kaisha Spinnplatte für das Schmelzspinnen und Verfahren zur Herstellung derselben
GB2152958A (en) * 1984-01-21 1985-08-14 Reiners Verwaltungs Gmbh Method and apparatus for spinning fibre formation
GB2152957A (en) * 1984-01-21 1985-08-14 Brockmanns K J Method and apparatus for spinning fibre formation

Also Published As

Publication number Publication date
JPH02136067U (de) 1990-11-13
FR2645880A1 (de) 1990-10-19

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