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WO1996009258A1 - Systeme d'apport de verre a deux composants - Google Patents

Systeme d'apport de verre a deux composants Download PDF

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Publication number
WO1996009258A1
WO1996009258A1 PCT/US1995/011503 US9511503W WO9609258A1 WO 1996009258 A1 WO1996009258 A1 WO 1996009258A1 US 9511503 W US9511503 W US 9511503W WO 9609258 A1 WO9609258 A1 WO 9609258A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass
molten glass
receiving
set forth
receiving station
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.)
Ceased
Application number
PCT/US1995/011503
Other languages
English (en)
Inventor
Steven F. Geiger
Rodrick S. Cook
Lawrence J. Ploetz
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.)
Owens Corning
Original Assignee
Owens Corning
Owens Corning Fiberglas Corp
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 Owens Corning, Owens Corning Fiberglas Corp filed Critical Owens Corning
Priority to AU35098/95A priority Critical patent/AU3509895A/en
Publication of WO1996009258A1 publication Critical patent/WO1996009258A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/02—Forehearths, i.e. feeder channels
    • 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
    • C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
    • 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
    • C03B37/075—Manufacture of non-optical fibres or filaments consisting of different sorts of glass or characterised by shape, e.g. undulated fibres
    • C03B37/0753—Manufacture of non-optical fibres or filaments consisting of different sorts of glass or characterised by shape, e.g. undulated fibres consisting of different sorts of glass, e.g. bi-component fibres
    • 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
    • C03B37/08—Bushings, e.g. construction, bushing reinforcement means; Spinnerettes; Nozzles; Nozzle plates
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B7/00—Distributors for the molten glass; Means for taking-off charges of molten glass; Producing the gob, e.g. controlling the gob shape, weight or delivery tact
    • C03B7/08—Feeder spouts, e.g. gob feeders
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2213/00—Glass fibres or filaments
    • C03C2213/04—Dual fibres

Definitions

  • This invention relates to apparatus for manufacturing dual component fibers from thermoplastic materials and, more particularly, to a dual glass delivery system for receiving first and second molten glass compositions from melting equipment and separately transporting the first and second glass compositions to at least one glass fiber forming device.
  • Fibers of glass and other thermoplastic materials are useful in a variety of applications including acoustical or thermal insulation materials.
  • Common prior art methods for producing glass fiber insulation products involve producing glass fibers from a rotary process.
  • a single molten glass composition is delivered from a conventional melter via a conventional forehearth to a centrifuge, commonly known as a spinner.
  • the forehearth defines only a single delivery channel through which the single glass composition travels.
  • the forehearth supplies a plurality of spinners with glass material. Each spinner produces primarily short, straight glass fibers.
  • the fibers produced by the spinners are drawn downward by a blower.
  • a binder which is required to bond the fibers into a wool product, is sprayed onto the fibers as they are drawn downward.
  • the fibers are then collected and formed into a wool pack.
  • Existing glass wool insulation materials produced using the aforementioned process have been found to have significant nonuniformities in the distribution of fibers within the product. This adversely affects the insulating capability of the insulation product.
  • a further disadvantage is the required use of a binder. Not only is the binder itself expensive, but great pains must be taken to process effluent from the production process due to the negative environmental impact of most organic compounds.
  • a delivery system is provided which delivers two separate glass compositions to one or more fiberizers from which dual component glass fibers having an irregular shape are produced. These fibers are then formed into wool insulating products. Such products have a substantially uniform volume filling nature and sufficient product integrity such that use of an organic binder may not be required.
  • the delivery system of the present invention allows existing melters which have typically been used in the manufacture of single component glass fibers to be used in the manufacture of dual component glass fibers.
  • apparatus for making dual glass fibers.
  • the apparatus comprises: equipment for providing first and second molten glass compositions; a delivery system for receiving the first and second molten glass compositions from the equipment and separately transporting the first and second glass compositions to at least one receiving station; and, at least one fiberizer which defines the at least one receiving station for receiving the first and second molten glass compositions and producing dual glass fibers therefrom.
  • the equipment may comprise a first melter for providing the first molten glass composition and a second melter for providing the second molten glass composition.
  • the equipment may comprise a single, dual-chamber melter for providing both the first and second molten glass materials.
  • the delivery system includes first and second forehearths.
  • the first and second forehearths may be positioned generally parallel to one another.
  • the first and second forehearths respectively define first and second delivery channels which transport and deliver the first and second glass compositions to first and second forehearth discharge stations positioned adjacent to the at least one receiving station.
  • the first and second forehearths respectively further define first and second combustion chambers.
  • the first forehearth includes first discharge structure which defines the first discharge station for discharging the first glass composition to the at least one receiving station.
  • the second forehearth includes second discharge structure which defines the second discharge station for discharging the second glass composition to the at least one receiving station.
  • the first discharge structure includes a first flow block having a first asymmetric orifice with a first outlet for directing the first glass composition to the at least one receiving station.
  • the second discharge structure includes a second flow block having a second asymmetric orifice with a second outlet for directing the second glass composition to the at least one receiving station.
  • the first and second orifices are symmetrical.
  • the first delivery channel has a first longitudinally extending centerline and the second delivery channel has a second longitudinally extending center line which is separated a first distance from the first center line.
  • the first and second outlets are spaced a second distance from one another. The first distance is greater than the second distance.
  • the delivery system may include a first receiving channel for accepting the first molten glass composition from the equipment and transporting the first glass composition to the first forehearth and a second receiving channel for accepting the second molten glass composition from the equipment and transporting the second glass composition to the second forehearth.
  • a process for making dual glass fibers.
  • the process comprises the steps of: providing first and second distinct molten glass compositions; delivering separately the first and second molten glass compositions to at least one receiving station; and centrifuging at the receiving station dual glass fibers from the first and second glass compositions.
  • Figure 1 is a plan view of first and second melters and a delivery system for transporting and delivering first and second distinct glass compositions to one or more fiberizers;
  • Figure 2 is a schematic side view of a forehearth forming part of the delivery system shown in Figure 1;
  • Figure 3 is a sectional view taken along line 3-3 in Figure 2;
  • Figure 3 A is an enlarged, partially sectional view of a portion of one discharge station shown in Figure 3;
  • Figure 4 is a plan view of the first and second discharge stations
  • Figure 5 is a sectional view taken along line 5-5 in Figure 4;
  • Figure 6 is a perspective sectional view of a flow block;
  • Figure 7 is a sectional view taken along line 7-7 in Figure 2;
  • Figure 8 is a sectional view taken along line 8-8 in Figure 2;
  • Figure 9 is a plan view of a dual-chamber melter and a delivery system formed in accordance with a second embodiment of the present invention. MODES FOR CARRYING OUT THE INVENTION
  • the invention will be described in terms of apparatus for making irregularly shaped (i.e., nonstraight along their axial length) dual glass fibers, although it is to be understood that the invention encompasses apparatus for making other types of dual glass fibers such as curly (helical) fibers and dual component fibers of other thermoplastic materials such as polyester or polypropylene, or combinations of glass and polymer.
  • Apparatus 10 for forming dual glass fibers is shown in Figure 1.
  • the apparatus 10 comprises first and second conventional furnaces or melters 11a and lib which provide two distinct molten glass compositions (A glass and B glass) to a delivery system 20 which, in turn, separately transports and delivers the A and B glass compositions to a plurality of rotary fiberizers 30, see also Figures 2 and 3.
  • the rotary fiberizers 30 may be constru ⁇ ed and utilized to make dual glass fibers as set out in U.S. Patent Application Serial No. 08/148,098, entitled DUAL-GLASS FIBERS AND INSULATION PRODUCTS THEREFROM, filed on November 5, 1993, the disclosure of which is hereby incorporated by reference.
  • the A and B glasses have different mechanical attributes so that upon cooling, they will assume an irregular (as opposed to straight) configuration.
  • Such different mechanical attributes may be, for example, differing coefficients of thermal expansion, differing melting points, differing viscosities, or differing mechanical strengths.
  • Veils (not shown) of dual glass fibers, such as irregularly shaped glass fibers produced by the fiberizers 30, are collected as a wool pack in the manner set out in the referenced '098 application.
  • the delivery system 20 comprises first and second receiving channels 12a and 12b and first and second generally parallel forehearths 40 and 50 which are defined by a single forehearth structure 60.
  • the A glass flows from a discharge orifice (not shown) in melter 1 la through the first receiving channel 12a and into the first forehearth 40.
  • the B glass flows from a discharge orifice (not shown) in melter 1 lb through the second receiving channel 12b and into the second forehearth 50.
  • the first and second forehearths 40 and 50 define respectively first and second delivery channels 42 and 52, see Figures 3, 7, and 8.
  • the channels 42 and 52 transport and deliver the A and B glass compositions to one or more first and second discharge stations 44 and 54, which, in turn, discharge the A and B glasses to one or more fiberizers 30, see Figure 3.
  • each fiberizer 30 is positioned adjacent to each fiberizer 30 so as to supply A and B glasses to each fiberizer 30.
  • four first discharge stations 44 and four second discharge stations 54 are provided for four fiberizers 30, see Figure 1.
  • Each first discharge station 44 is defined by a first flow block 44a, a first bushing block 44b, and a first platinum bushing 44c, see Figures 3, 4, and 5.
  • each second discharge station 54 is defined by a second flow block 54a, a second bushing block 54b, and a second 0 bushing 54c, see also Figure 3A.
  • the bushing 54c is held against the first bushing block 54b via a plurality of bushing clamps 55 a, four in the illustrated embodiment, which engage a first ceramic holder 55b positioned over the bushing 54c.
  • the clamps 55a are fixedly connected to a second bushing hanging plate 55c which, in turn, is fixedly connected to the forehearth plate 46.
  • the first and second hanging plates 45c and 55c are spaced from one another. 5
  • the first and second flow blocks 44a to prevent electromagnetically induced currents and 54a are configured such that the A and B glasses are delivered directly to desired locations within the fiberizer 30 without the need for any intermediate directing means.
  • the first flow block 44a has a first asymmetric orifice 44d with a first outlet 44e which together with bushing 44c directs the A glass through a first 0 fiberizer tube 32a and into the fiberizer 30 such that the A glass contacts at a first desired location within the fiberizer 30, see Figures 3, 4, and 5.
  • the second flow block 54a has a second asymmetric orifice 54d with a first outlet 54e which together with bushing 54c directs the B glass through a second fiberizer tube 32b and into the same one fiberizer 30 such that the B glass contacts at a second desired location within the fiberizer 30.
  • the A and B glasses do not engage the first and second tubes 32a and 32b as they pass therethrough. Since the first and second orifices 44d and 54d in combination with bushings 44c and 54c route the A and B glasses directly to desired locations within the fiberizer 30, intermediate directing means such as directing tubes are not required. Tubes or other like intermediate directing means tend to wear out over short time periods and do not always maintain stable positions. Hence, such directing means are undesirable.
  • the first delivery channel 42 has a first longitudinally extending centerline 42a and the second delivery channel 52 has a second longitudinally extending center line 52a which is separated a first distance D, from the first center line, see Figure 5.
  • the first and second outlets are spaced a second distance D. from one another.
  • the first distance D is greater than the second distance D 2 .
  • Electrodes 70 serve as a primary source for transferring energy in the form of heat to the A and B glass compositions during fiber production to maintain those glass compositions molten as they pass through the channels 42 and 52.
  • the preferred number of electrodes 70 and the spacing between adjacent electrodes 70 may be varied as is known in the art in order to maintain the glass compositions molten.
  • the first and second forehearths 40 and 50 also define first and second combustion chambers 48 and 58, see Figures 3, 7, and 8.
  • a plurality of gas-fired burners 72 are associated with the first and second chambers 48 and 58 and serve to transfer energy in the form of heat to the first and second combustion chambers 48 and 58 during fiber produ ⁇ ion. Should a power failure occur preventing the electrodes 70 from fun ⁇ ioning, the amount of heat that is generated by the gas-fired burners 72 can be increased to maintain the A and B glasses molten.
  • Chimney passages 48a and 58a are provided to vent combustion gases from the chambers 48 and 58 to atmosphere, see Figures 7 and 8.
  • the forehearth structure 60 which defines the first and second forehearths 40 and 50 will now be described.
  • the forehearth structure 60 is constructed from a plurality of glass conta ⁇ blocks 20a, firebricks 20b, insulation blocks 20c, and back-up blocks 20d.
  • the glass conta ⁇ blocks 20a may comprise bonded alumina-chromia compositions having a chromia content ranging from about 1% to 96%.
  • Such glass conta ⁇ blocks are commercially available from North American Refra ⁇ ories Company under the produ ⁇ name "SERV” and from Corhart Refra ⁇ ories Corporation under the produ ⁇ name “Zirchrom.”
  • the blocks 20a may also comprise fused cast chrome-alumina blocks which are commercially available from The Carborundum Company under the produ ⁇ name "Monofrax K-3,” or zirconia-alumina-silica refra ⁇ ory which is commercially available from The Carborundum Company under the produ ⁇ names "Monofrax S-3,” “Monofrax S-4,” and “Monofrax S-5.”
  • the firebricks 20b may comprise mullite brick which are commercially available from North American Refra ⁇ ories Company under the produ ⁇ name "Tamul.”
  • the insulation blocks 20c may comprise conventional insulating firebrick.
  • the back-up blocks 20d may comprise pressed zircon which is commercially available from North American Refractories Company under the produ ⁇ name "TZB”; alumina-fireclay, which is commercially available from Harbison-Walker Refractories under the product name "Ufala”; or an insulating clay flux which is commercially available from Findlay under the produ ⁇ name "Finsulation.”
  • Each forehearth 40 and 50 includes a plurality of access openings 49 and 59 which, in the illustrated embodiment, are positioned in proximity to the first and second discharge stations 44 and 54, see Figure 3.
  • the openings 49 and 50 are normally closed offby a like number of movable access cover blocks 49a and 59a.
  • the access cover blocks 49a and 59a are moved to allow end tips of start-up burners (not shown) to be positioned in the first and second delivery channels 42 and 52.
  • the start-up burners extend through peep holes 49b and 59b in the forehearths 40 and 50.
  • the openings 49 and 50 further provide repair access to the inside portions of the discharge stations 44 and 54.
  • the peep holes 49b and 59b are closed offby removable blocks, such as firebrick.
  • the number of peep holes 49b and 59b is generally equal to the number of access openings 49 and 59.
  • the flow blocks 44a and 54a, and the access cover blocks 49a and 59a may be formed from the same material as the glass conta ⁇ blocks 20a.
  • the bushing blocks 44b and 54b may be formed from isostatically pressed or slip cast dense zircon, which is commercially available from A.P. Green Industries, Inc. under the product name "ISO-Z-245.”
  • the glass conta ⁇ blocks 20a, the firebricks 20b, the insulation blocks 20c, the back-up blocks 20d, the bushing blocks 44b and 54b, and the flow blocks 44a and 54a are fri ⁇ ionally held together by conventional clamping mechanisms (not shown). While mortar (not shown) may be used between one or more of the blocks 20a through 20d, it serves mainly to seal joints between the blocks.
  • the first and second forehearths are provided with drain openings 80.
  • the openings 80 allow for drainage of the A and B glass compositions should one or more of the fiberizers 30 become disabled. Thus, after the disabled fiberizer has become operational again, restarting of the forehearths 40 and 50 may not be necessary.
  • Each of the first and second receiving channels 12a and 12b is constru ⁇ ed in generally the same manner and from generally the same refra ⁇ ory materials as the forehearth structure 60.
  • the channels 12a and 12b are also provided with an appropriate number of heating ele ⁇ rodes and gas-fired burners.
  • Apparatus 90 for forming dual glass fibers, formed in accordance with a second embodiment of the present invention is shown in Figure 9, where like reference numerals indicate like elements.
  • Apparatus 90 is essentially the same as apparatus 10 shown in Figure 1, except that a single, dual-chamber furnace or melter 91 is provided.
  • the delivery system 20 receives the two distinct molten glass compositions (A glass and B glass) output from the melter 91 and separately transports and delivers the A and B glass compositions to a plurality of rotary fiberizers 30.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Glass Melting And Manufacturing (AREA)

Abstract

L'invention concerne un procédé et un appareil (10, 90) de fabrication de fibres de verre à deux composants. L'appareil (10, 90) comprend un ensemble de dispositifs permettant d'obtenir une première composition et une deuxième composition de verre liquide. La première composition et la deuxième composition de verre liquide sont acheminées vers un système d'apport (20) qui les transfère séparément vers au moins un poste de réception. Au moins un appareil (30) de réalisation de fibres définissant au moins un poste de réception reçoit la première composition et la deuxième composition de verre liquide et permet d'obtenir les fibres de verre à deux composants.
PCT/US1995/011503 1994-09-21 1995-09-13 Systeme d'apport de verre a deux composants Ceased WO1996009258A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU35098/95A AU3509895A (en) 1994-09-21 1995-09-13 Dual glass delivery system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31068594A 1994-09-21 1994-09-21
US08/310,685 1994-09-21

Publications (1)

Publication Number Publication Date
WO1996009258A1 true WO1996009258A1 (fr) 1996-03-28

Family

ID=23203659

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/011503 Ceased WO1996009258A1 (fr) 1994-09-21 1995-09-13 Systeme d'apport de verre a deux composants

Country Status (4)

Country Link
AU (1) AU3509895A (fr)
TR (1) TR199501159A2 (fr)
WO (1) WO1996009258A1 (fr)
ZA (1) ZA957892B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000023390A1 (fr) * 1998-10-19 2000-04-27 Owens Corning Machine de fabrication de fibres comportant un avant-corps equipe d'une ou de plusieurs colonnes d'ouverture
FR2922884A1 (fr) * 2007-10-29 2009-05-01 Saint Gobain Technical Fabrics Blocs de reception d'une matiere fondue, notamment du verre, et installation de fibrage pourvue de tels blocs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1828217A (en) * 1928-12-12 1931-10-20 Hartford Empire Co Method of and apparatus for feeding molten glass
US1873866A (en) * 1930-08-27 1932-08-23 Hartford Empire Co Means for and method of obtaining variegated glass
US2998620A (en) * 1958-06-09 1961-09-05 Owens Corning Fiberglass Corp Method and means for centrifuging curly fibers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1828217A (en) * 1928-12-12 1931-10-20 Hartford Empire Co Method of and apparatus for feeding molten glass
US1873866A (en) * 1930-08-27 1932-08-23 Hartford Empire Co Means for and method of obtaining variegated glass
US2998620A (en) * 1958-06-09 1961-09-05 Owens Corning Fiberglass Corp Method and means for centrifuging curly fibers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000023390A1 (fr) * 1998-10-19 2000-04-27 Owens Corning Machine de fabrication de fibres comportant un avant-corps equipe d'une ou de plusieurs colonnes d'ouverture
FR2922884A1 (fr) * 2007-10-29 2009-05-01 Saint Gobain Technical Fabrics Blocs de reception d'une matiere fondue, notamment du verre, et installation de fibrage pourvue de tels blocs
WO2009056726A3 (fr) * 2007-10-29 2009-08-06 Saint Gobain Technical Fabrics Blocs de reception d'une matiere fondue, notamment du verre, et installation de fibrage pourvue de tels blocs
CN101918332A (zh) * 2007-10-29 2010-12-15 欧洲圣戈班技术结构公司 接收熔融物质特别是玻璃的块体和设有这种块体的成纤设备

Also Published As

Publication number Publication date
AU3509895A (en) 1996-04-09
ZA957892B (en) 1996-04-29
TR199501159A2 (tr) 1996-06-21

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