WO2006136480A1 - Rouleau de traitement pour fibres comportant un revetement dur - Google Patents

Rouleau de traitement pour fibres comportant un revetement dur Download PDF

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Publication number
WO2006136480A1
WO2006136480A1 PCT/EP2006/062228 EP2006062228W WO2006136480A1 WO 2006136480 A1 WO2006136480 A1 WO 2006136480A1 EP 2006062228 W EP2006062228 W EP 2006062228W WO 2006136480 A1 WO2006136480 A1 WO 2006136480A1
Authority
WO
WIPO (PCT)
Prior art keywords
saw tooth
roll
tooth wire
fiber processing
wire
Prior art date
Application number
PCT/EP2006/062228
Other languages
English (en)
Inventor
Johan Palmers
Christiaan Scheerens
Original Assignee
Nv Bekaert Sa
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 Nv Bekaert Sa filed Critical Nv Bekaert Sa
Publication of WO2006136480A1 publication Critical patent/WO2006136480A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/84—Card clothing; Manufacture thereof not otherwise provided for
    • D01G15/88—Card clothing; Manufacture thereof not otherwise provided for formed from metal sheets or strips

Definitions

  • the invention relates to a fiber processing roll having a card clothing in the form of a saw tooth wire.
  • Fiber processing rolls are frequently used in the treatment of fibers in the textile industry. More particularly, fiber processing rolls may be used in the pre-carding stages, the carding stage and the post- carding stage, and relate to, amongst others, carding as such and combing.
  • the carding process separates fibers from each other, lays them parallel and condenses them into singular untwisted bunches or strands prior to spinning.
  • the carding process can be done by hand or by machines. If done by means of machines, the working components are formed by the card clothing.
  • the card clothing may take the form of saw tooth steel wires.
  • the saw tooth steel wires may be present on cylindrical rolls.
  • the carding process is a very abrasive process. This abrasive character is accentuated by the speed of current carding processes.
  • a fiber processing roll having a card clothing in the form of a saw tooth wire. At least part of the saw tooth wire is covered with a coating that is selected from the group consisting of a diamond-like carbon, diamond-like nanocomposite, a doped diamond-like carbon and a doped diamond- like nanocomposite, or a combination thereof.
  • These coatings may have a high degree of hardness, e.g. a hardness above 8 GPa, e.g. above 10 GPa, as measured by means of a nano-indenter.
  • the coatings may also have a low coefficient of friction against steel, as measured by means of a ball-on-disc test. The high degree of hardness extends the life time of the fiber processing rolls.
  • the saw tooth wire is helically wound on the roll in several revolutions.
  • the saw tooth wire has a leading end, which is the end when starting the winding on the roll, and a trailing end, which is the end when finishing the winding on the roll. Both the leading end and the trailing end are fixed to the roll, preferably only in a mechanical way or only by means of welding or by a combination of both.
  • Diamond-like carbon (DLC) coatings is an amorphous carbon based coating.
  • DLC coating may be a mixture of sp2 and sp3 bonded carbon atoms with a hydrogen concentration ranging from 0% to 65% (atomic percentage).
  • Diamond-like nano-composite (DLN) coatings are commercialized under the trademark DYLYN ® and comprise C, H, Si and O, e.g. a network of Si and O interpenetrating with a network of C and H : a-Si:O enhances high temperature stability, leads to lower friction & lowers films stress a-C: H provides diamond-like properties.
  • the roll has a helical groove for receiving the saw tooth wire.
  • the foot of the saw tooth wire of one revolution interlocks with the foot of the saw tooth wire of an adjacent revolution.
  • a fiber processing roll according to the invention can be used at various places in a process of treating textile fibers.
  • the fiber processing roll can be used as: a licker-in to feed fibers into the carding cylinder; a doffer to remove fibers from the carding cylinder; a carding roll located in the periphery around a carding cylinder; a comber roll to treat fibers after the carding process as such but before the spinning process.
  • FIGURE 1 gives an outer view of a fiber processing roll
  • FIGURE 2 gives a cross-section of a first embodiment of a fiber processing roll
  • FIGURE 3 gives a cross-section of a second embodiment of a fiber processing roll
  • FIGURE 4 illustrates part of a cross-section of a third embodiment of a fiber processing roll.
  • a saw tooth wire can be made as follows.
  • Starting product is a wire rod (usual diameters 5.5 mm or 6.5 mm) with a steel composition along the following lines: a carbon content ranging from 0.30 % to 2.0 %, e.g. from 0.5 to 1.2 %; e.g. from 0.6 to 1.1 %; a silicon content ranging from 0.10 % to 2.5 %, e.g. from 0.15 to -A-
  • a manganese content ranging from 0.10 % to 2.0 %, e.g. from 0.50 to 0.90 %; a chromium content ranging from 0.0 % to 2.0 %, e.g. from 0.10 % to 1.50 %; e.g. from 0.10 % to 0.90 %; a vanadium content ranging from 0.0 % to 2.0 %, e.g. from 0.05 % to 0.60 %, e.g. from 0.10 % to 0.50 %; a tungsten content ranging from 0.0 % to 1.5 %, e.g. from 0.1 % to 0.70 %.
  • either chromium or vanadium is present.
  • both chromium and vanadium are present.
  • the amounts of sulfur and phosphorous are preferably kept as low as possible, e.g. both below 0.05 %, e.g. below 0.025 %.
  • the wire rod is cold and dry drawn until an intermediate diameter is reached.
  • the desired non-round profile may be obtained by further rolling or by profile drawing. Rolling can be carried out by means of Turks heads or by means of rolls. Profile drawing can be done by means of profile drawing dies. The profile depends upon the application can be square, rectangular, or take an L-form. The basis leg of the L forms the foot and the top leg of the L will house the eventual teeth.
  • the teeth are formed in the profile wire by means of a laser operation, a cutting operation or a punching operation.
  • the teeth may take various forms and have varying pitches, depending upon the application.
  • the forming of the teeth may be followed by a deburring operation.
  • the formed saw toot wire is subjected to some heat treatments which aim at stress-relieving the foot of the saw tooth wire and at hardening the teeth. Therefore, the entire saw tooth wire is heated until a temperature in the neighborhood of 600 0 C and the teeth get an additional heating until they reach a temperature of about 900 0 C. Thereafter the entire saw tooth wire is quenched so that the foot is stress relieved and the teeth are hardened since the teeth are subjected to a much greater jump in temperature.
  • the global heating until 600 0 C can be done by means of induction heating or by means of a gas burner.
  • the heating of the teeth until 900 0 C can be done by means of an additional gas burner, or by passing the teeth through a plasma arc or torch.
  • the quenching operation can be done in an oil bath or in a bath of polymers.
  • teeth and possibly also other parts of the card clothing wire are oxide free.
  • Various alternatives exit to obtain this oxide free status.
  • the surfaces are made oxide free in a mechanical way. This can be done e.g. by post-treatments such as sand blasting, glass blasting, or brushing.
  • the surfaces are made oxide free in a chemical way. This can be done by etching the card clothing wire in
  • a third alternative is just to avoid the creation and presence of oxides. This can be achieved, e.g. by carrying out the most critical steps of the processing in an oxide free environment, e.g. under a protective gas atmosphere.
  • FIGURE 1 shows an outer view of a fiber processing roll 10.
  • a predetermined length of a saw tooth wire 20 is helically wound on the roll 10 and is fixed thereto.
  • both the leading end and the trailing end of saw tooth wire 20 may be fixed to the roll by means of welds (not shown) just as in the embodiment of FIGURE
  • FIGURE 2 The difference with the embodiment of FIGURE 2 is that the anchorage of the saw tooth wire 20 to the roll 10 is more secured due to the fact that the feet 26 of the saw tooth wire 20 have a particular profile so that a foot 26 of one revolution of a saw tooth wire 20 interlocks with a foot 26 of an adjacent revolution of a saw tooth wire 20.
  • FIGURE 4 shows a third embodiment.
  • the cylindrical surface of roll 10 has a helical groove 16.
  • the feet 28 of sawing wire 20 have such a profile that a force fit into the groove 16 is possible.
  • the roll 10 with the saw tooth wire 20 is cleaned to avoid all fat, grease or lubricants present.
  • the whole is then placed in a vacuum chamber where a PACVD process takes place to obtain a hard diamond-like carbon (DLC) coating on at least the working surface of the teeth 24 of the saw tooth wire 20.
  • a vacuum is created in the reactor until a typical background pressure of 10 "5 mbar is obtained.
  • the saw tooth wire and parts of the cylinder are made extra clean by means of a plasma/etching process whereby an Ar/H 2 plasma (for example with a 1/1 ratio) is ignited in the reactor.
  • the operating pressure may be 1.5 Pa, the gas flow 0.017 Pa. m 3 . s "1 (10 seem), rf (radio-frequency) power 90 W, cathode tension 500 V and time 5 min.
  • rf radio-frequency
  • cathode tension 500 V cathode tension 500 V
  • time 5 min time 5 min.
  • Operating rf power is 100 W
  • operating pressure is 10 Pa
  • gas flow is 0.085 Pa.rr ⁇ .s "1 .
  • the saw tooth wire temperature does generally not exceed 200 °C during the deposition process.
  • the thickness of the finally deposited DLC coating ranges from 0.5 ⁇ m to 10 ⁇ m, e.g. from 1 ⁇ m to 5 ⁇ m.
  • PACVD process is the reason that adhesives, particularly with solvents, are to be avoided in fixing the saw tooth wire to the roll.
  • the presence of adhesives may seriously harm the adhesion of the DLC coating to the saw tooth wire.
  • the presence of lubricants and grease must be avoided as well on the rolls.
  • the working surface of the teeth 24 of the saw tooth wire 20 is covered with a diamond-like carbon coating.
  • a diamond-like carbon coating it is preferable to have coated the whole saw tooth wire 20 and, possibly, also parts of the cylinder roll 10.
  • the DLC coated may comprise several doping elements such as N or one or another metal (W, V, ...) ⁇
  • an additional intermediate coating between the steel substrate and the DLC coating may be provided.
  • Such an intermediate coating may be a diamond-like nanocomposite coating such as disclosed in US-A-6
  • an intermediate layer under the top hard coating layer may function as an adhesion or tie layer between the substrate of the steel saw tooth wire and the top hard coating layer.
  • the intermediate tie layer may be selected from a group consisting of DLC coatings with another H-content than the top layer, diamond- like nanocomposite (DLN) coatings, doped diamond-like (DLC) coatings, TiN coatings, Ti (C,N) coatings, i-C coatings, Me-C, i.e. metal-carbon composition coatings such as WC or WCC, SiN coatings, CrN coatings or a combination hereof.
  • the thickness of this intermediate layer is preferably between 0.001 and 1 ⁇ m. More preferably, the thickness of the intermediate layer is between 0.1 and 0.5 ⁇ m.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

L'invention concerne un rouleau de traitement pour fibres (10), adapté à une utilisation pour, entre autres, du cardage, comprenant une garniture de carde sous forme d'une garniture en dents de scie (20). Au moins une partie (24) de la garniture en dents de scie (20) est recouverte d'un revêtement choisi parmi du carbone de type diamant, un nanocomposite de type diamant, du carbone dopé de type diamant, et un nanocomposite dopé de type diamant, ou une combinaison de ces matériaux.
PCT/EP2006/062228 2005-06-24 2006-05-11 Rouleau de traitement pour fibres comportant un revetement dur WO2006136480A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05105652 2005-06-24
EP05105652.1 2005-06-24

Publications (1)

Publication Number Publication Date
WO2006136480A1 true WO2006136480A1 (fr) 2006-12-28

Family

ID=35045240

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/062228 WO2006136480A1 (fr) 2005-06-24 2006-05-11 Rouleau de traitement pour fibres comportant un revetement dur

Country Status (1)

Country Link
WO (1) WO2006136480A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015135982A1 (fr) * 2014-03-12 2015-09-17 Groz-Beckert Kg Fil métallique de garniture de carde et procédé de fabrication de nappes de fibres discontinues

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07118935A (ja) * 1993-10-29 1995-05-09 Kanai Hiroyuki 紡機用メタリックワイヤ
US5547709A (en) * 1993-04-29 1996-08-20 Elektroschmelzwerk Kempten Gmbh Surface treatment of opening rollers for open end spinning
US6228471B1 (en) * 1997-02-04 2001-05-08 N.V. Bekaert S.A. Coating comprising layers of diamond like carbon and diamond like nanocomposite compositions
US6289588B1 (en) * 1998-04-30 2001-09-18 Graf & Cie Ag Process for manufacturing a device for treating textile fibers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5547709A (en) * 1993-04-29 1996-08-20 Elektroschmelzwerk Kempten Gmbh Surface treatment of opening rollers for open end spinning
JPH07118935A (ja) * 1993-10-29 1995-05-09 Kanai Hiroyuki 紡機用メタリックワイヤ
US6228471B1 (en) * 1997-02-04 2001-05-08 N.V. Bekaert S.A. Coating comprising layers of diamond like carbon and diamond like nanocomposite compositions
US6289588B1 (en) * 1998-04-30 2001-09-18 Graf & Cie Ag Process for manufacturing a device for treating textile fibers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 08 29 September 1995 (1995-09-29) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015135982A1 (fr) * 2014-03-12 2015-09-17 Groz-Beckert Kg Fil métallique de garniture de carde et procédé de fabrication de nappes de fibres discontinues
KR101760664B1 (ko) 2014-03-12 2017-08-04 그로츠-베케르트 카게 톱니형 와이어와 천연 섬유 플리스 제조 방법

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