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Publication numberUS3031717 A
Publication typeGrant
Publication dateMay 1, 1962
Filing dateMar 3, 1958
Priority dateMar 8, 1957
Also published asDE1092605B
Publication numberUS 3031717 A, US 3031717A, US-A-3031717, US3031717 A, US3031717A
InventorsMarcel Levecque, Paul Piot
Original AssigneeSaint Gobain
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Centrifugal fiber forming apparatus
US 3031717 A
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Description  (OCR text may contain errors)

May 1, 1962 M. LEVECQUE ETAL 3,031,717

CENTRIFUGAL FIBER FORMING APPARATUS Filed March 3, I958 INVENTORS MARCEL LEVECQUE PAUL PIOT ATTORNEY CENTRIFUGAL FIBER FGRMING APPARATUS Marcel Levecque, Saint-Gratien, and Paul Piot, Deuil,

France, assignors to Compagnie de Saint-Gobain, a corporation of France Filed Mar. 3, 1958, Ser. No. 718,654 Claims priority, application France Mar. 8, 1957 9 Ciaims. (Cl. 18--2.6)

The present invention relates to the manufacture of fibres from thermoplastic materials in the viscous state and particularly of glass fibres.

In this manufacture, it is known to use a hollow body into which the molten material is fed and the periphery of which is provided with orifices distributed in one or several rows. This hollow body being rotated at big. speed around its own axis, the material is projected by centrifugal force out of the orifices of the peripheral band in the form of streamlets which then undergo a drawing effect which transforms them into fibres.

It is also known to provide within, and co-axial with, the rotating body, a device shaped like a tank or trough of perforated side-walls into which the material is fed and serving to project said material onto the inside face of the peripheral band of the rotating body, and to distribute it evenly over the whole height of said band.

According to the present invention, the peripheral band and/ or the side wall of the distributing device is made of two elements in contact with each other, the outside element being made of a refractory material, and more particularly of a refractory alloy, ensuring good mechanical performance, and the internal element offering the maximum resistance to wear and permitting substantially constant feed conditions whatever may be the extent of wear of the external element.

In the present invention, the quantity of material projected through the openings of the peripheral band and/or of the distributing device is kept substantially constant during the life of said band or of said distributing device, the diameter of the openings which governs the feed conditions remaining constant and equal to the diameter suitable for giving themost favourable feed conditions.

In this connection it must be noted that the applicants have observed that, for an opening of 0.8 mm., a wear of the order of 0.1 mm. may bring about a feed increase of more than 50%.

According to an embodiment of the present invention, the external parts of the peripheral band and/ or of the wall of the distributing device are made of a refractory aloy whilst the internal parts are coated with a metal or alloy chemically resistant to glass at working temperature, such as platinum, platium-rhodium, tungsten, molybdenum or platinum-nickel.

The external and the internal part can be directly fitted one over the other, or fitted with interposition of a suitable intermediary material.

If desired, the openings of the internal parts may be of a diameter less than that of the openings of the external parts. Thus, the external parts of refractory alloy of the peripheral band can have openings of about 1 mm. diameter and the internal parts of glass-resistant alloy can have openings of about 0.5 to 0.6 mm. diameter. The internal parts may be thinner than the external parts.

In the annexed drawings showing, by way of example, a preferred embodiment of the invention:

FIG. 1 is a cross-section through the rotating body and its associated distributing device.

FIG. 2 is a section showing cylindrical orifices, and

FIG. 3 is a similar section showing tapering orifices.

Referring now to FIG. 1, 1 is the rotating body and 2 its associated distributing device. The peripheral band of the rotating body is made up of an external part 3 of tates Patent 3,031,717 IC Patented May 1, 1962 refractory material, preferably a refractory alloy, of good mechanical characteristics, and an internal part 4 of a wear-resistant material such as platinum or platinum-alloy. The diameter of the openings 5 of part 4 is inferior to that of the openings 6 of part 3 and it must be noted that the rate of projection of glass is determined by the size of openings 5.

The openings 6 may be cylindrical, as shown in FIG. 2, or tapering as shown in FIG. 3.

The distributing device 2 may be similarly constructed and comprises an external part 7 ensuring good mechanical behaviour and an internal wear-resistant part 8. The openings 9 and 10 provided in the internal part 8 and in the external part 7 respectively may be arranged as described above for the openings 5 and 6 of the peripheral band.

It must be understood that the present invention is not limited to the embodiment above described and illustrated which has been selected only by way of example.

What is claimed is:

1. Apparatus for producing fibers from molten thermoplastic viscous material including a centrifuging body having a peripheral wall provided with a plurality of projection orifices, said peripheral wall being formed of two elements in contact with each other, the external element being made of a refractory alloy, ensuring good mechanical performance, and the internal element offering the maximum resistance to wear in presence of the molten thermoplastic material, and with the orifices in the internal element having a smaller diameter than those in the external element so that the diameter of the orifices located in said elements remain practically unchanged over long periods of use.

2. An apparatus of the type set forth in claim 1 wherein the thickness of the external element is greater than the thickness of the internal element.

3. An apparatus of the type set forth in claim l where in the orifices in the internal element have a cylindrical shape while the orifices of the external element have a frusto conical shape.

4. An apparatus of the type set forth in claim 1 wherein the external and internal elements are directly fitted one over the other.

5. An apparatus of the type set forth in claim 1 wherein the external and internal elements are bonded one on the other.

6. An apparatus of the type set forth in claim 1 wherein the external and internal elements are bonded one on the other with a suitable material interposed between said elements.

7. An apparatus as set forth in claim 1 acting as a distributing organ in conjunction with a surrounding hollow centrifuge provided with a plurality of rows of orifices in the lateral wall thereof, said organ being located inside said last-mentioned centrifuge and spaced from said lastmentioned wall.

8. An apparatus according to claim 1 wherein the external element is a refractory alloy and the internal element is a metal of the group consisting of platinum, platinum-rhodium, tungsten, molybdenum, and platinumnickel.

9. Apparatus for producing fibers from a supply body of molten glass including an outer centrifuging body having a peripheral wall provided with a plurality of outlet orifices, said peripheral wall being formed of a refractory alloy resistant to heat, warpage and chemical attack, an internal element afiixed to the inside surface of the peripheral wall of the centrifuging body and provided with a series of orifices of smaller diameter than said orifices in said peripheral wall of the centrifuging body and in axial alignment therewith, said internal element offering maximum resistance to heat, chemical attack and wear in the presence of the molten glass, the refractory alloy constituting the peripheral wall of the centrifuging body next to the orifices of the internal element and therebetween serving to support and maintain the metal of the internal element against displacement and warpage in the presence of high temperature and the revolution of the peripheral wall of the outer centrifuging body and the internal element at high speeds.

References Cited in the file of this patent UNITED STATES PATENTS 1,592,140 Horton et al. July 13, 1926 2,031,083 Weller Feb. 18, 1936 2,133,236 Slayter et al Oct. 11, 1938 Richardson Feb. 13, 1940 Slayter et a1. Sept. 9, 1952 Heymes et a1; Jan. 13, 1953 Siefert et al Jan. 15, 1957 Kleist et a1 Aug. 23, 1960 FOREIGN PATENTS Australia Dec. 27, 1956 France Oct. 11, 1956 OTHER REFERENCES Glass Fibersf by De Dani, in Chemistry and Industry, pages 482-489, at pages 482 and 483, April 30, 1955 issue. Published by the Society of Chemical Industry, London,

15 England.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1592140 *Aug 22, 1924Jul 13, 1926PeakeWire-spinning machine
US2031083 *Jan 21, 1933Feb 18, 1936Baker & Co IncGuide or support for molten glass
US2133236 *Dec 26, 1933Oct 11, 1938Owens Illinois Glass CoGlass wool and method and apparatus for making same
US2190296 *Aug 27, 1938Feb 13, 1940Westinghouse Electric & Mfg CoGuide for molten material
US2609566 *Dec 31, 1948Sep 9, 1952Owens Corning Fiberglass CorpMethod and apparatus for forming fibers
US2624912 *May 26, 1947Jan 13, 1953Saint GobainProcess and apparatus for the production of fibers from thermoplastics
US2777254 *Oct 22, 1952Jan 15, 1957Owens Corning Fiberglass CorpCoated refractory for contacting molten glass and method of making same
US2949631 *Dec 6, 1956Aug 23, 1960Owens Corning Fiberglass CorpApparatus for forming fibers
AU205437B * Title not available
FR1124487A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3316074 *Oct 25, 1963Apr 25, 1967Saint GobainMetallic elements adapted to come in contact with melted glass
US3318694 *Oct 30, 1963May 9, 1967Owens Corning Fiberglass CorpNickel chrome alloy
US3372014 *Jun 7, 1965Mar 5, 1968United States Gypsum CoApparatus for forming fibers
US4511383 *Jul 14, 1983Apr 16, 1985Owens-Corning Fiberglas CorporationElectropolishing rotor
US4808097 *Jan 21, 1987Feb 28, 1989Sanei-Kisetsu Co., Ltd.Apparatus for manufacturing short inorganic fibers
US5118332 *Jun 4, 1991Jun 2, 1992Owens-Corning Fiberglas CorporationHigh strength alloy
US5312469 *Mar 25, 1992May 17, 1994Owens-Corning Fiberglas Technology Inc.Using a spinner with a peripheral wall having an inner and outer layer; temperature differential between layers; external fluid treatment attenuates fibers
US5417735 *Dec 23, 1993May 23, 1995Mcgarry; Dennis L.Interdiffused chromium/nickel corrosion-resistant coating for fiberglass spinner bores
US5846284 *Jul 31, 1996Dec 8, 1998Owens Corning Fiberglas Technology, Inc.Spinner with eyelets having multiple orifices
EP0235897A1 *Jan 22, 1987Sep 9, 1987Sanei-Kisetsu Co., Ltd.Apparatus for manufacturing short inorganic fibres
EP0668122A1 *Feb 16, 1995Aug 23, 1995SEVA, société dite,Method of manufacturing a container element for a fluid
Classifications
U.S. Classification65/515, 65/521, 425/8
International ClassificationC03B37/04
Cooperative ClassificationC03B37/047, C03B37/045
European ClassificationC03B37/04E, C03B37/04D