US1928699A - Method of making mineral wool mixture - Google Patents
Method of making mineral wool mixture Download PDFInfo
- Publication number
- US1928699A US1928699A US567203A US56720331A US1928699A US 1928699 A US1928699 A US 1928699A US 567203 A US567203 A US 567203A US 56720331 A US56720331 A US 56720331A US 1928699 A US1928699 A US 1928699A
- Authority
- US
- United States
- Prior art keywords
- fibres
- mineral wool
- filaments
- mixture
- sustaining
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
Definitions
- This invention relates to the manufacture of heat insulating materials comprising mineral wool or rock wool filaments and sustaining or strengthening fibres, such as asbestos; one object 5 of the invention being the provision of a durable,
- fire-resisting, heat insulating material adapted to such uses as the insulation of ice-houses, cold storage rooms, steam pipes, etc.
- the filaments of mineral wool are vitreous, and though to a sensible degree flexible and elastic, are nevertheless brittle and tend to break up into small fragments forming a coarse dust; this deterioration of the product is not only incident to handling but also occurs after it has been placed in wall-spaces for heat insulation purposes, as a result of jarring and vibrations to which all structures are subjected more or less.
- sustaining or reinforcing fibres are intermixed with the mineral wool filaments with substantially uniform distribution; the mixture is effected without subjecting the mineral wool to mechanical handling, and preferably before the mineral wool fibres or filaments have settled for the first time after their formation by the usual pneumatic means.
- the mineral wool filaments Once the mineral wool filaments have settled on each other to form a loose, tangled aggregate, they can not thereafter be freely separated or dispersed as individual filaments and therefore no fully satisfactory approximation to a uniform distribution of other fibres through the aggregate is possible.
- This invention in its aspect of method and in its preferred mode is characterized by the introduction of dispersed sustaining fibres among the mineral wool fibres by pneumatic means, while both the mineral wool filaments and sustaining fibres are held suspend- .ed and dispersed in pneumatic currents, which by their intermixture and confluence cause mutual intermixture of the two kinds of fibre preferably before the mineral wool fibres have settled out of the streamof air and water vapor which bears them from their point of origin, where the molten slag or rock is blown into filaments by the steam jet in the well known manner.
- Other aspects and features of the invention will transpire from the description herein below.
- the material preferred, for imparting strength and durability to a fibrous mass predominantly consisting of mineral wool, is asbestos fibre, which is, like the mineral wool itself, incombustible.
- A represents a cupola furnace, in which the rock or slag material is fused
- B the tap from which fused rock is drawn to flow in a thin stream
- C the nozzle from which a steam blast issues, to disrupt the stream of melted rock and draw it out into fine filaments
- D the wool-bin
- D the aperture in the side of the wool-bin through which the gaseous stream, bearing dispersed rock filaments, is blown
- K a conveyor on which the rock wool W settles and is conveyed out of the wool-bin through the aperture D therein.
- the travel of the conveyor is adjusted so that the fibrous material is removed from the woolbin at the same rate that it is delivered in; this prevents accumulation of fibre in the bin and consequent reduction of the free air space therein, and thus preserves constant the conditions under which the two classes of fibres are mixed together, ensuring a uniform mixed product.
- pneumatic as distinguished from mechanical means for producing a state of dispersion of the fibres, are em-' ployed, particularly with respect to the mineral wool fibres.
- the sustaining fibres, as of asbestos, being mechanically stronger than the mineral wool fibres, may, and normally will, be subjected to mechanical dispersion in preparation for interspersion with the mineral wool fibres.
- the object of mixture with sustaining fibres with a minimum of damage to the mineral wool fibres will best be served by effecting this mixture while the mineral wool fibres are in their initial stage of dispersion, and before their first settlement into a mass of tangled filaments.
- P represents an air-pipe leading from an in take G to a fan-blower F.
- the intake G is preferably from the interior of the wool-bin D, so that floating fibres will be drawn to the blower and so that the introduction of the asbestosfibre bearing blast-will not lower the temperature or increase the pneumatic pressure in the wool-bin.
- L represents a feed box for introducing asbestosfibre to the intake pipe P.
- H represents an airblast pipe, leading from the blower E to the delivery-noihle 1, within the woolbin, which is so (1 ected as to deliver an air stream in which ashes fibres are dispersed and borne, into confluence with the pneumatic stream which bears dispersed mineral wool fibres W.
- the proportion of mineral wool to asbestos may be varied to suit the purposes of the manufacturer. The normal variations will lie, probably between 20% and 50% of asbestos, to and 50% mineral wool fibre.
- the uniformity of distribution of sustaining fibres through a mass of mineral wool fibres minimizes the liability of the matted fibres to be broken and crushed in handling and thus preserves the heat-insulating efllciency of the fibre mass.
- the adjusted rate of travel of the conveyor belt K contributes to this end, since the continuous removal of the fibre mixture from the wool-bin permits its accumulation into a deep mass and dispenses with intermittent mechanical removal or" such masses.
- the mixture of the two classes of fibres is efiected by pneumatic currents and eddies, it is important to maintain unchanged the volume and shape of the space within which such currents and eddies perform their function; this is provided for by the correspondence between the rates of introduction and withdrawal of fibre material.
- Method of making a mixture of mineral wool filaments and sustaining fibers characterized by feeding fused rock into a fluid stream to form mineral filaments in fluid suspension and directing pneumatically suspended and dispersed supporting fibers between the suspended filaments, and then allowing the resulting mixture to settle.
- Method of making a mixture of mineral wool filaments and sustaining fibers characterized by blowing fused rock into the air to form dispersed mineral filaments, directing sustaining fibers upon a pneumatic stream into intermingled relation with the filaments while still in the air, and permitting the resulting mixture to settle.
- Method of making a mixture of mineral woolfilaments and sustaining fibres characterized by employing a fluid stream directed into the air to form filaments from fused rock, employing a confluent pneumatic stream to bear sustaining fibers so that the fibers are mixed with the mineral filaments while the latter are still in the air, and allowing the filaments and fibers to settle as thus mixed.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Thermal Insulation (AREA)
Description
.Oct. 3, 1933.
J. B. NEAL 1,928,699
METHOD OF MAKING MINERAL WOOL MIXTURE Original Filed July 27, 1927 Patented Oct. 3, 1933 UNITED STATES PATENT OFFICE James B. Neal, Lockport, N. Y., assigncr, by mesne assignments, to Johns-Manville Corporation, New York, N. York Y., a corporation of New Original application July 27, 1927, Serial No. 208,810. Divided and this application October 6, 1931. Serial No. 567,203
3 Claims.
This invention relates to the manufacture of heat insulating materials comprising mineral wool or rock wool filaments and sustaining or strengthening fibres, such as asbestos; one object 5 of the invention being the provision of a durable,
fire-resisting, heat insulating material, adapted to such uses as the insulation of ice-houses, cold storage rooms, steam pipes, etc.
The filaments of mineral wool are vitreous, and though to a sensible degree flexible and elastic, are nevertheless brittle and tend to break up into small fragments forming a coarse dust; this deterioration of the product is not only incident to handling but also occurs after it has been placed in wall-spaces for heat insulation purposes, as a result of jarring and vibrations to which all structures are subjected more or less.
By the invention herein described, sustaining or reinforcing fibres, inherently tougher than mineral wool filaments, are intermixed with the mineral wool filaments with substantially uniform distribution; the mixture is effected without subjecting the mineral wool to mechanical handling, and preferably before the mineral wool fibres or filaments have settled for the first time after their formation by the usual pneumatic means. Once the mineral wool filaments have settled on each other to form a loose, tangled aggregate, they can not thereafter be freely separated or dispersed as individual filaments and therefore no fully satisfactory approximation to a uniform distribution of other fibres through the aggregate is possible. This invention in its aspect of method and in its preferred mode is characterized by the introduction of dispersed sustaining fibres among the mineral wool fibres by pneumatic means, while both the mineral wool filaments and sustaining fibres are held suspend- .ed and dispersed in pneumatic currents, which by their intermixture and confluence cause mutual intermixture of the two kinds of fibre preferably before the mineral wool fibres have settled out of the streamof air and water vapor which bears them from their point of origin, where the molten slag or rock is blown into filaments by the steam jet in the well known manner. Other aspects and features of the invention will transpire from the description herein below.
The physical conditions which characterize this invention might measurably be obtained by imperfect dispersion of mineral wool fibres by pneumatic means applied thereto after their initial settlement and mixture therewith, while in such state of dispersion as might be thus effected, of dispersed sustaining fibres.
The material preferred, for imparting strength and durability to a fibrous mass predominantly consisting of mineral wool, is asbestos fibre, which is, like the mineral wool itself, incombustible.
The method will be explained by reference to the drawing hereto annexed, which represents an apparatus by which the method may be practiced and the product obtained. In this drawing, A represents a cupola furnace, in which the rock or slag material is fused, B the tap from which fused rock is drawn to flow in a thin stream, C the nozzle from which a steam blast issues, to disrupt the stream of melted rock and draw it out into fine filaments; D the wool-bin, D the aperture in the side of the wool-bin through which the gaseous stream, bearing dispersed rock filaments, is blown, K a conveyor on which the rock wool W settles and is conveyed out of the wool-bin through the aperture D therein.
The travel of the conveyor is adjusted so that the fibrous material is removed from the woolbin at the same rate that it is delivered in; this prevents accumulation of fibre in the bin and consequent reduction of the free air space therein, and thus preserves constant the conditions under which the two classes of fibres are mixed together, ensuring a uniform mixed product.
To accomplish this object with a minimum of fracture of the mineral wool fibres, pneumatic, as distinguished from mechanical means for producing a state of dispersion of the fibres, are em-' ployed, particularly with respect to the mineral wool fibres. The sustaining fibres, as of asbestos, being mechanically stronger than the mineral wool fibres, may, and normally will, be subjected to mechanical dispersion in preparation for interspersion with the mineral wool fibres.
Furthermore, as the mineral wool fibres are, as an incident to their mode of formation, initially home by and suspended in a state of dispersion in, a pneumatic stream, the object of mixture with sustaining fibres with a minimum of damage to the mineral wool fibres will best be served by effecting this mixture while the mineral wool fibres are in their initial stage of dispersion, and before their first settlement into a mass of tangled filaments.
Referring again to the drawing hereto annexed:
. P represents an air-pipe leading from an in take G to a fan-blower F. The intake G is preferably from the interior of the wool-bin D, so that floating fibres will be drawn to the blower and so that the introduction of the asbestosfibre bearing blast-will not lower the temperature or increase the pneumatic pressure in the wool-bin. L represents a feed box for introducing asbestosfibre to the intake pipe P. H represents an airblast pipe, leading from the blower E to the delivery-noihle 1, within the woolbin, which is so (1 ected as to deliver an air stream in which ashes fibres are dispersed and borne, into confluence with the pneumatic stream which bears dispersed mineral wool fibres W. The confluence of these two fibre-bearing streams produces eddies which effect a substantially uniform mutual intermixture of the two types of fibres, while the mineral wool fibres are, so to speak, in their nascent stage, so that, as the mixed fibres settle on the conveyor K in a mixture M, the mineral wool fibres are matted loosely for the first time, and settle with the dispersed asbestos fibre uniformly distributed through the mass. Thus the mixture of sustaining fibres with mineral wool fibres is effected with no more mechanical injury to individual mineral wool fibres than is incidental to the primary settling of the said fibres.
While, in the fibre-mixture thus produced small tufts of asbestos fibre will be perceptible, these are accounted for by the unavoidable imperfections in the dispersion of the asbestos fibres; a large proportion of the asbestos fibres is distributed as single fibres or very small aggregates, throughout the mass of mineral wool fibre.
The proportion of mineral wool to asbestos may be varied to suit the purposes of the manufacturer. The normal variations will lie, probably between 20% and 50% of asbestos, to and 50% mineral wool fibre.
The uniformity of distribution of sustaining fibres through a mass of mineral wool fibres, produced by the above-described method minimizes the liability of the matted fibres to be broken and crushed in handling and thus preserves the heat-insulating efllciency of the fibre mass. The adjusted rate of travel of the conveyor belt K contributes to this end, since the continuous removal of the fibre mixture from the wool-bin permits its accumulation into a deep mass and dispenses with intermittent mechanical removal or" such masses. Moreover, as the mixture of the two classes of fibres is efiected by pneumatic currents and eddies, it is important to maintain unchanged the volume and shape of the space within which such currents and eddies perform their function; this is provided for by the correspondence between the rates of introduction and withdrawal of fibre material.
I claim:
1. Method of making a mixture of mineral wool filaments and sustaining fibers, characterized by feeding fused rock into a fluid stream to form mineral filaments in fluid suspension and directing pneumatically suspended and dispersed supporting fibers between the suspended filaments, and then allowing the resulting mixture to settle.
2. Method of making a mixture of mineral wool filaments and sustaining fibers, characterized by blowing fused rock into the air to form dispersed mineral filaments, directing sustaining fibers upon a pneumatic stream into intermingled relation with the filaments while still in the air, and permitting the resulting mixture to settle.
3. Method of making a mixture of mineral woolfilaments and sustaining fibres, characterized by employing a fluid stream directed into the air to form filaments from fused rock, employing a confluent pneumatic stream to bear sustaining fibers so that the fibers are mixed with the mineral filaments while the latter are still in the air, and allowing the filaments and fibers to settle as thus mixed.
JAMES B. NEAL.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US567203A US1928699A (en) | 1927-07-27 | 1931-10-06 | Method of making mineral wool mixture |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20881027A | 1927-07-27 | 1927-07-27 | |
US567203A US1928699A (en) | 1927-07-27 | 1931-10-06 | Method of making mineral wool mixture |
Publications (1)
Publication Number | Publication Date |
---|---|
US1928699A true US1928699A (en) | 1933-10-03 |
Family
ID=26903526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US567203A Expired - Lifetime US1928699A (en) | 1927-07-27 | 1931-10-06 | Method of making mineral wool mixture |
Country Status (1)
Country | Link |
---|---|
US (1) | US1928699A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2589008A (en) * | 1947-07-03 | 1952-03-11 | Owens Corning Fiberglass Corp | Apparatus for forming fibrous mats |
US2612462A (en) * | 1947-11-20 | 1952-09-30 | Johns Manville | Laminated insulating block and method of making the same |
US2639759A (en) * | 1947-07-03 | 1953-05-26 | Owens Corning Fiberglass Corp | Method of forming glass fiber mats |
US2702069A (en) * | 1951-01-30 | 1955-02-15 | Owens Corning Fiberglass Corp | Method for forming fibrous mats |
US2751962A (en) * | 1950-11-16 | 1956-06-26 | Owens Corning Fiberglass Corp | Method and apparatus for producing fibrous products |
US2862524A (en) * | 1954-10-05 | 1958-12-02 | Johns Manville | Reinforced plastic article |
US3016599A (en) * | 1954-06-01 | 1962-01-16 | Du Pont | Microfiber and staple fiber batt |
-
1931
- 1931-10-06 US US567203A patent/US1928699A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2589008A (en) * | 1947-07-03 | 1952-03-11 | Owens Corning Fiberglass Corp | Apparatus for forming fibrous mats |
US2639759A (en) * | 1947-07-03 | 1953-05-26 | Owens Corning Fiberglass Corp | Method of forming glass fiber mats |
US2612462A (en) * | 1947-11-20 | 1952-09-30 | Johns Manville | Laminated insulating block and method of making the same |
US2751962A (en) * | 1950-11-16 | 1956-06-26 | Owens Corning Fiberglass Corp | Method and apparatus for producing fibrous products |
US2702069A (en) * | 1951-01-30 | 1955-02-15 | Owens Corning Fiberglass Corp | Method for forming fibrous mats |
US3016599A (en) * | 1954-06-01 | 1962-01-16 | Du Pont | Microfiber and staple fiber batt |
US2862524A (en) * | 1954-10-05 | 1958-12-02 | Johns Manville | Reinforced plastic article |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5123949A (en) | Method of introducing addivites to fibrous products | |
US2751962A (en) | Method and apparatus for producing fibrous products | |
US2489242A (en) | Method and apparatus for making fine glass fibers | |
US2133236A (en) | Glass wool and method and apparatus for making same | |
US2318244A (en) | Fiberizing mineral substances by centrifuge and blast | |
US2057393A (en) | Process and furnace for making mineral wool | |
US2126411A (en) | Method for making mineral wool | |
CN104004873A (en) | Process for co-production of nickel pig iron and rock wool products by using laterite-nickel ore | |
US1928699A (en) | Method of making mineral wool mixture | |
US2515738A (en) | Apparatus for producing glass fibers | |
US2230270A (en) | Apparatus for forming webs of fibrous material | |
US2188373A (en) | Felted product and method and machine for making the same | |
US2199087A (en) | Apparatus for applying binding materials | |
US2217538A (en) | Method of making rock wool articles and apparatus therefor | |
US2554486A (en) | Method for producing fibrous material | |
US2356826A (en) | Method of manufacturing mineral wool and product | |
US2131599A (en) | Manufacture of mineral wool | |
US2318243A (en) | Apparatus for fiberizing fusible inorganic substances and forming the fibers into bats | |
US1769181A (en) | Method of producing fibers from vitreous materials | |
JP5990494B2 (en) | Rock wool production method and equipment | |
US4532006A (en) | Inorganic fiber mat using mineral wool and related process and apparatus | |
US3265483A (en) | Fiber forming apparatus | |
US3331669A (en) | Method and apparatus for forming mineral wool products | |
US2594799A (en) | Method and apparatus for the manufacture of mineral wool | |
CN110746090B (en) | Production system and production method of microfiber glass wool |