WO2006040501A1 - Method and device for continuously producing glass-sheathed metal wires by supplying metal particles - Google Patents
Method and device for continuously producing glass-sheathed metal wires by supplying metal particles Download PDFInfo
- Publication number
- WO2006040501A1 WO2006040501A1 PCT/FR2005/050846 FR2005050846W WO2006040501A1 WO 2006040501 A1 WO2006040501 A1 WO 2006040501A1 FR 2005050846 W FR2005050846 W FR 2005050846W WO 2006040501 A1 WO2006040501 A1 WO 2006040501A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal
- glass tube
- tube
- bath
- molten metal
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
- C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
- C03B37/026—Drawing fibres reinforced with a metal wire or with other non-glass material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/005—Continuous casting of metals, i.e. casting in indefinite lengths of wire
Definitions
- the invention relates to the continuous and stable manufacture of glass-sheathed metal wires, and in particular when the two constituent materials of the wire are heated and melted to be stretched continuously in their final form.
- a certain amount of metal is introduced beforehand into a glass tube 5 closed at its base.
- the lower part of this glass tube 5 is placed in the vicinity of a high frequency inductor 24, which leads to the melting of the metal 4 placed in the glass tube.
- the glass softens by thermal conduction.
- the casting operation of the microfilament, consisting of the wire in its glass sheath 5, is initiated manually by means of a capillary.
- the thread 1 thus initiated is then placed on a winding device 11, so as to be continuously stretched.
- it is necessary to stabilize the various process parameters such as the temperature of the molten metal bath 4, the winding speed and the speed of advance of the glass tube obtained by means of 6.
- the temperature of the molten metal bath 4 may be measured by a pyrometer 30.
- the temperature is adjusted by means of a vacuum system 8 associated with the tube. 5.
- this depression of the order of 300 Pa
- the metal bath 4 is moved towards or away from the most intense heating zone of the inductor 24. and therefore its temperature decreases.
- This parameter influences the geometrical characteristics in the following way: the higher the temperature of the molten metal, the smaller the metal diameter of the wire 1 obtained.
- a winding system 11 containing three reel supports is associated with the drawing process. It is an automatic carousel system designed to make the change from one reel to another without causing the breaking of the thread.
- the diameters of the metallic and total core of the wire 1 decrease when the winding speed increases.
- the feed device 6 is set up for centering and vertical advance of the glass tube 5.
- the feed rates are adjustable from 0.5 to 5 mm / min and are evolve the diameters of the metallic and total core of the wire 1 linearly.
- Yarns whose total diameter may vary from 6 to 25 ⁇ m and more, with a metal core ranging from 2 to 18 ⁇ m, are commonly obtained by this forming process.
- the method and the device of manufacture described in the French patent application 2,823,744 describes a device which is composed of two inductors 23 and 24 at high frequency, placed one above the other. the other, around the glass tube 20. One is placed in the lower part and allows the heating of the molten metal bath 14 and the other is placed in the upper part, around the glass tube 20 and allows the constant temperature maintenance of a metal reserve in the liquid state 12.
- This reserve of liquid metal 12 is placed in a quartz tube 15 terminated by a nozzle 13, so as to continuously feed the molten metal bath 14.
- the metal supply is carried out by placing the liquid metal reserve in contact with the molten metal bath 14.
- a vacuum system 38 connected to the liquid metal reserve 14 it is thus possible to dispense the quantity of metal desired.
- the vacuum control of the liquid metal in the liquid metal reservoir 12 is technically very difficult to control. Indeed, the pressure regulations of some Pascals, necessary for the determination, are very difficult to achieve because of the hot gas currents above the liquid metal reserve 12.
- the use of the two inductors 23 and 24 poses coupling problems from one inductor to the other.
- the deoxidation of the feed tube 15 causes pollution of the metal during a prolonged production period.
- the object of the invention is therefore to overcome these disadvantages.
- a first main object of the invention is a continuous and stable manufacturing process of a glass-clad wire consisting of:
- the method consists, during the continuous manufacture of the wire, of supplying metal in a continuous and regular manner by means of a controlled distribution system of metal particles and via the tube intended for the supply of metal which is a guide tube for particles to the melt.
- a second main object of the invention is a device for continuously manufacturing a glass-wrapped wire, by means of a glass tube closed at its base, and of determined diameter, comprising mainly: a tube for the supply of metal, placed in a glass tube containing a metal mass, of external diameter less than the internal diameter of the glass tube and not softening at the melting temperature of the metal to be melted, this tube having a lower end placed very close to the molten metal bath;
- heating means for melting a metal mass placed in the glass tube and maintaining the molten metal bath formed by softening a lower portion of the glass tube;
- the device comprises a controlled distribution system of metal particles for feeding the metal bath continuously and regularly during drawing, the tube for the metal supply is a guide tube of the particles towards the bath of molten metal.
- - Water jets means for quenching the sheathed wire that has just been stretched
- the controlled dispensing system is constituted by a rotating axis doser.
- this controlled dispensing system is constituted by an automatic slitter of ribbons.
- the regulated dispensing system is constituted by a worm feeder.
- the regulated dispensing system is constituted by a vibrating metering device.
- the regulated dispensing system is constituted by a notched band doser.
- the method according to the invention is based on the yarn draw according to the method of TAYLOR-ULITOVSKY, with a feed of the molten metal bath by contribution of solid metal particles and whose individual mass represents less than 0.5% of the mass of molten metal.
- the particle feed rate is a function of the metal consumption during the pulling of the wire. It must be adjustable, which allows a regulated particle distribution system associated with the manufacturing process.
- the process according to the invention makes it possible to produce glass-sheathed metallic microfilamines for long periods of time under absolutely fixed and stable conditions in the glass. time, limiting the actions of the operator on the device implementing the method.
- this method solves the problems encountered in those of the prior art. Indeed, the manufacture of the particles remains easy to achieve for a satisfactory cost. It is thus possible to accurately and regularly compensate the consumed metal, without disturbing the molten metal bath and thus modify the geometric properties of the son.
- FIG. 3 to 8 show six embodiments of the device according to the invention and only the distribution system of the metal particles changes, the rest of the installation being the same for these six embodiments. Consequently, this common part will be described only once, with reference to FIG.
- the internal diameter of the glass tube 20 is between 8 and 50 mm, with a wall thickness of 0.8 to 5 mm and a length of between 0.5 and 1 m.
- the glass tube 20 In the glass tube 20 is placed an initial mass of metal, of the order of ten grams, depending on the dimensions of the glass tube 20. This metal is either a set of massive alloy pieces or composed of a certain amount of metal particles used for feeding. The glass tube 20 is then fixed in moving means 25 to lower it gradually.
- the device is completed with an inductor 24 placed below the glass tube, centrally, so as to heat with maximum efficiency the molten metal bath 14 placed in the lower part of the glass tube 20.
- a pyrometer 30 is also used at this level to control the temperature.
- the device is completed by a water jet 34 which allows the quenching of the sheathed wire 10 thus manufactured, the latter being stored automatically on a winding device 11.
- a guide tube 45 is used which has an outer diameter less than the internal diameter of the glass tube 20 and is placed inside thereof, this guide tube 45 not being intended to contain a reserve of liquid metal.
- a gland seal 33 is thus used to center it in the upper part of the glass tube 20. This allows the glass tube 20 to slide relative to the guide tube 45.
- the lower end of the guide tube 45 just ends Above the bath of molten metal 14.
- the guide tube 45 has an upper part placed at the outlet of a rotational axis metering device 41 enclosed in a box 49 and fed by a hopper 42 in which there are metal particles.
- the set constitutes the regulated distribution system, referenced 40. Metal particles are thus sent into the guide tube 45, descend into it to feed the molten metal bath 14.
- the embodiment variant described in FIG. 4 concerns only the regulated distribution system, referenced 50 for it.
- the latter comprises a motor 51 whose speed of the output shaft 53 is relatively slow.
- This output shaft 53 rotates about a groove axis, a rotating axis device 54 placed below a hopper 52 containing the metal particles to be sent into the guide tube 45, the latter being completely straight.
- the metal particles are advantageously beads with a diameter of about 1.5 mm, representing 15 mg of metal.
- the groove axis drives the particles and it is thus possible to feed the metal bath 14 with 230 mg of metal per minute.
- the third envisaged embodiment of the regulated dispensing system is shown in FIG. 5, under the reference 60. More specifically, it consists of an automatic ribbons cutter comprising a ribbon spool 61 from which is rolled a ribbon 62 which is inserted in an automatic ribbon cutting device 63, and which therefore makes it possible to provide flat particles of metal, for example at least 5 mm long, at a speed of less than 2 cuts per second, depending on the rate of consumption of desired metal. The cuts are very precise, reproducible and repeatable, to 100 ⁇ m.
- FIG. 6 shows a fourth embodiment of the regulated distribution system, which is a worm doser 70. The latter comprises a speed-regulated motor 71, driving a worm 73 fed with metal particles by a hopper 72 and whose end terminates above a guide tube 45.
- FIG. 7 represents a fifth embodiment of the controlled distribution system, in the form of a vibratory feeder 80. This also uses a speed-regulated motor 81, causing a gutter 83 to vibrate via a vibrating device 84. A hopper 82 supplies the gutter with metal particles. The end of the latter is above the guide tube 45.
- the sixth and last described embodiment of the controlled distribution system is described in Figure 8 and uses a toothed belt device 90.
- This uses a speed-regulated motor 91, resulting in an endless toothed belt 93.
- This is fed by a hopper 92, each metal particle falling into a notch of the toothed belt 93 which constitutes for each of these particles a drive means.
- This device is used to advance the particles at a low speed at a desired speed.
- the metal particles used may have different geometric shapes, that is to say spherical, powder, ball, wire, ribbons, or whatever (shredded, flat, glitter). Their shape is directly related to the manufacturing method used and chosen according to the distribution system used downstream.
- the mass of a contributed particle be between 0.5 and 30 mg for an initial mass of the molten metal bath of 6 grams, ie 0.01 at 0.5% of the initial mass of the molten metal present in the glass tube 20. If the mass of a contributed particle is too small, for example less than 0.5 mg, the transfer of material between the particles, at room temperature, and the molten metal bath is not carried out due to poor heat transfer.
- the coupling of this particle is a function of the frequency of the inductor 24, the size and shape of the particle. For example, for an inductor frequency of the order of 400 kHz, a good coupling is obtained with the use of spherical particles larger than 0.5 mm in diameter. If the mass of a contributed particle is too large, for example greater than 30 mg, thermal disturbances will be observed in the bath of molten metal, for example temperature variations greater than 1O 0 C causing significant geometrical variations on the diameter of the wires, or liquid metal spurts due to the shocks of the particles on the bath of molten metal.
- the production of the particles can be the same as that existing in the prior art.
- one atomization by a jet of neutral gas or very low oxidizing under high pressure (powders) atomization by rotating electrode (powders), forging (beads), mechanical grinding, machining ( more specifically turning and milling to obtain chips), and the realization of ribbon by hypertrempe wheel.
- the supply of metal particles it is a function of consumption during the production of the wire. It is therefore necessary to distribute the particles according to this consumption rate.
- the latter can be characterized by regular intervals, between the contribution of one or more particles, ranging from 2 to 60 seconds. This contribution must be made taking into account the fact that the total mass of the particles introduced must never exceed the limit of 0.5% of the mass of the molten metal in the tube, in order to limit any thermal disturbance.
- the importance of controlling the geometrical and mass parameters of the input particles with respect to the choice of the regulated distribution system used is emphasized.
- the metal supply must therefore be controlled at best, in order to properly compensate for the consumption of metal during the drawing of the wire.
- the choice will be made according to the mass and shape of the particles, the accuracy and reproducibility of the desired dosage and the cost of the dispensing device.
- the guide tube 45 must have an inside diameter, slightly greater than the height of the particles provided. Then, it is necessary to adjust the distance between the lower end of the guide tube 45 and the metal bath by 14. This distance must be slightly smaller than the diameter of the particles brought. Indeed, if they do not arrive at the center of the molten metal, they can arrive in a side area of the glass tube 20, where the glass is in the viscous state and remain locked there. If one of these particles is present in this area, this can cause disturbances in the flow of the glass leading to breakage of the wire.
- the guide tube 45 must thus withstand temperatures close to the molten metal bath. If the temperature of this molten metal bath is of the order of 1100 ° C. to 1300 ° C., quartz constitutes a good material to be used to constitute this guide tube 45.
- a magnet 47 may be placed around the glass tube 20, a few centimeters above the inductor 24, if the metal particles made are magnetic. Indeed, such a magnet 47 makes it possible to slow down the fall of the particles and thus to prevent a spurt of the molten metal on the walls, also ensuring the good transfer of materials between the particles and the molten metal bath. If they are not magnetic, the shape and material of the guide tube 45 can be modified to slow the fall of the particles.
- One embodiment provides, with the use of a rotating-axis device, as a regulated distribution system, the use of an alloy consisting of a cobalt, iron, nickel, molybdenum, boron ingot and silicon with a density of 7.5 g per cubic centimeter, known elsewhere. 6 g of this alloy are placed beforehand in the glass tube 20 which is borosilicate and consists of a Pyrex type material 7 740, 600 mm long and an internal diameter of 12.6 mm, the thickness the wall of the glass being 1.2 mm.
- the inductor used may be of the monospire type, slightly curved, with a diameter of 50 mm external and internal diameter of 8 mm, powered by a frequency generator at 440 kHz.
- the guide tube may have a length of 700 mm, a outer diameter of 4 mm and an internal diameter of 2 mm.
- the temperature of the metal alloy is maintained at 1 200 0 C in the glass tube, while the speed of advance of the latter is 1.6 mm per minute and the winding speed is 9 m / s.
- the wire is drawn under these conditions to a total diameter of 12 ⁇ m and a metal core of 8 ⁇ m.
- the consumption of metal, during the drawing of the wire then has an average flow rate of 203 mg / min.
- the particles used are spherical powders, of the same composition as that of the metal initially inserted into the glass tube and can be obtained by atomization with water.
- the lower end of the guide tube is placed at a maximum distance of 1 mm from in a bath of molten metal.
- the rotational speed of the feeder motor is set at 13.3 rpm to compensate for metal consumption of 203 mg / min. Every 4.5 seconds, a 15 mg metal particle falls to feed the molten metal bath for a period of time that the operator defines based on the desired number of miles of wire.
- the temperature of the metal alloy is now maintained at 120 ° C. in the glass tube, the feed rate thereof is set at 1.8 mm / min and the winding speed at 5.5 m / min. s.
- the yarn stretched under these experimental conditions therefore has different geometrical characteristics, ie a total diameter of 16 ⁇ m and a metal core of 6 ⁇ m.
- the metal consumption during wire drawing is 70 mg / min.
- the lower end of the guide tube is at a maximum distance of 0.5 mm from the bath molten metal.
- the speed of rotation of the feeder motor is thus set at 14 rpm to compensate for the metal consumption of 70 mg / min. Every 4.2 seconds, a 5 mg metal particle falls to feed the molten metal bath.
- spherical metal particles of 25 mg are now used. (An average diameter of 1.9 mm), the lower end of the guide tube is positioned at a maximum distance of 1.5 mm from the bath of molten metal.
- the motor of the feeder is therefore set at a speed of rotation of 2.8 rpm to compensate for the metal consumption of 70 mg / min, ie the drop of a particle of 25 mg every 21 seconds.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/576,000 US20070209776A1 (en) | 2004-10-15 | 2005-10-13 | Method and device for continuously producing glass-sheathed metal wires by supplying metal particles |
EP05810597A EP1799378A1 (en) | 2004-10-15 | 2005-10-13 | Method and device for continuously producing glass-sheathed metal wires by supplying metal particles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0410918 | 2004-10-15 | ||
FR0410918A FR2876685B1 (en) | 2004-10-15 | 2004-10-15 | PROCESS AND DEVICE FOR CONTINUOUSLY MANUFACTURING GLASS SHEET METAL WIRES BY FEEDING METAL PARTICLES |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006040501A1 true WO2006040501A1 (en) | 2006-04-20 |
Family
ID=34950133
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2005/050846 WO2006040501A1 (en) | 2004-10-15 | 2005-10-13 | Method and device for continuously producing glass-sheathed metal wires by supplying metal particles |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070209776A1 (en) |
EP (1) | EP1799378A1 (en) |
FR (1) | FR2876685B1 (en) |
WO (1) | WO2006040501A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL188559A0 (en) * | 2008-01-03 | 2008-11-03 | D T N R Ltd | Method of production of glass coated metal wires and metal microwires |
WO2010091087A1 (en) * | 2009-02-03 | 2010-08-12 | The Nanosteel Company, Inc. | Method and product for cutting materials |
CN107138699A (en) * | 2017-06-30 | 2017-09-08 | 深圳市金鼎丰贵金属设备科技有限公司 | Bonding wire continuous casting furnace |
CN112517870A (en) * | 2020-11-18 | 2021-03-19 | 江苏欣宏泰机电有限公司 | High-precision wire drawing machine |
CN112710664A (en) * | 2020-12-14 | 2021-04-27 | 河南牧业经济学院 | Soybean grain non-adhesion image acquisition method and system based on special-shaped tube array |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3294504A (en) * | 1962-03-06 | 1966-12-27 | Mosaic Fabrications Inc | Method of making fiber bundles |
CH443574A (en) * | 1965-08-10 | 1967-09-15 | Kishinevsky Ni Elektrotekhnich | Process for the production of glass-coated extra-fine cast wire from a metal alloy |
US3481390A (en) * | 1966-05-02 | 1969-12-02 | United Aircraft Corp | Process for making composite fibers |
FR2149373A1 (en) * | 1971-08-17 | 1973-03-30 | Arbed | Forming small dia metal threads - continuous mfre for high melting point metals eg steel |
US4277270A (en) * | 1978-04-21 | 1981-07-07 | Eotec Corporation | Method of manufacture of optical fiber |
US5110334A (en) * | 1990-07-31 | 1992-05-05 | The United States Of America As Represented By The Secretary Of The Navy | Method of producing glass fiber with cores of a different material |
FR2823744A1 (en) * | 2001-04-18 | 2002-10-25 | Commissariat Energie Atomique | Continuous production of long glass-sheathed metal wires involves supplying a continuous metal drop at the base of a glass tube and drawing |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3479168A (en) * | 1964-03-09 | 1969-11-18 | Polaroid Corp | Method of making metallic polarizer by drawing fusion |
US3483072A (en) * | 1966-11-22 | 1969-12-09 | United Aircraft Corp | Process for producing glass coated berylliumfibers and resulting products |
US3672426A (en) * | 1969-10-08 | 1972-06-27 | Belden Corp | Process of casting filament |
US3791172A (en) * | 1971-07-21 | 1974-02-12 | Montedison Spa | Apparatus for making a glass or the like coated wire |
US3978703A (en) * | 1975-06-23 | 1976-09-07 | Gary Steel Products Corporation | Automatic strip cutter |
FR2716130B1 (en) * | 1994-02-14 | 1996-04-05 | Unimetall Sa | Method and device for the continuous casting of very small diameter metal wires directly from liquid metal. |
-
2004
- 2004-10-15 FR FR0410918A patent/FR2876685B1/en active Active
-
2005
- 2005-10-13 WO PCT/FR2005/050846 patent/WO2006040501A1/en active Application Filing
- 2005-10-13 EP EP05810597A patent/EP1799378A1/en not_active Withdrawn
- 2005-10-13 US US11/576,000 patent/US20070209776A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3294504A (en) * | 1962-03-06 | 1966-12-27 | Mosaic Fabrications Inc | Method of making fiber bundles |
CH443574A (en) * | 1965-08-10 | 1967-09-15 | Kishinevsky Ni Elektrotekhnich | Process for the production of glass-coated extra-fine cast wire from a metal alloy |
US3481390A (en) * | 1966-05-02 | 1969-12-02 | United Aircraft Corp | Process for making composite fibers |
FR2149373A1 (en) * | 1971-08-17 | 1973-03-30 | Arbed | Forming small dia metal threads - continuous mfre for high melting point metals eg steel |
US4277270A (en) * | 1978-04-21 | 1981-07-07 | Eotec Corporation | Method of manufacture of optical fiber |
US5110334A (en) * | 1990-07-31 | 1992-05-05 | The United States Of America As Represented By The Secretary Of The Navy | Method of producing glass fiber with cores of a different material |
FR2823744A1 (en) * | 2001-04-18 | 2002-10-25 | Commissariat Energie Atomique | Continuous production of long glass-sheathed metal wires involves supplying a continuous metal drop at the base of a glass tube and drawing |
Non-Patent Citations (1)
Title |
---|
See also references of EP1799378A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20070209776A1 (en) | 2007-09-13 |
EP1799378A1 (en) | 2007-06-27 |
FR2876685A1 (en) | 2006-04-21 |
FR2876685B1 (en) | 2007-08-17 |
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