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Патент USA US3048899

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Aug. 14, 1962
M. s. FIRNHABER ET AL
3,048,886
APPARATUS FOR MANUFACTURING MINERAL WOOL FIBERS
Filed April 1. 1960
BY
Mass 5. FIRNHABER.
7%» l‘?rro?A/izs'.
trrt
?fice
3,048,88?
Patented Aug. 14, 1962
2
1
FIG. 1 is a view, principally in vertical section, of the
?berizing apparatus comprising the present invention;
vFIG. 2 is a top plan view of the rotor, taken along line
3,048,886
APPARATUS FOR MANUFACTURING MINERAL
WOOL FIBERS
Miles S. Firnhaber, Pewaukee, Joseph R. Miller, Merton,
and Michael J. Kovach, Hartland, Wis, assignors to
2—-2 of FIG. 1;
FIG. 3 is a fragmentary top plan view of the annular
rim member employed in the present invention;
Sealtite Insulation Mfg. C0rp., Waultesha, Wis, a cor
FIG. 4 is a sectional view of said annular rim taken
poration of Wisconsin
Filed Apr. 1, 1960, Ser. No. 19,209
10 Claims. (Cl. 18-26)
along lines 4-4 of FIG. 3; and
FIG. 5 is a plan view of one of the spacing washers em
10
ployed in the invention.
General Operation
This invention relates to an improved apparatus for
manufacturing mineral wool ?bers and the like, and more
In the general operation of a ?berizing apparatus as
particularly to an improved ?ber-producing apparatus in
shown, molten glass or other like material is delivered
cluding a rotor constructed entirely of metal.
In the operation of ?berizing apparatus, molten glass or 15 from the melting furnace by a tube 13 (FIG. 1 of the draw
ing) and deposited thereby onto the dished upper surface
similar thermoplastic material is thrown from a rapidly
of a rapidly-spinning rotor, which is designated generally
spinning rotor by centrifugal force and acted upon by a
by the numeral 35. Hot gases or ?ames 21 are constant
blast of steam or other ?berizing agent to produce the
ly directed against said rotor top surface by means of
thin ?bers used in mineral wool and similar products.
Heretofore, the molten material receiving portions of 20 burners 20 to maintain the molten material at a proper
such rotors have customarily been constructed of a ceramic
temperature and viscosity, and a hood 23‘ is provided to
or refractory insulating material, in order that the molten
glass deposited thereon could be maintained at a stifli
prevent outside air from contacting and prematurely cool
ing the material. The molten material is ?ung from the
periphery of the rotor by centrifugal force, in the form of
c-iently high temperature during the ?berizing operation.
It was thought that a rotor formed of metal could not with
stand the intense heat required and that there would be a
rapid deterioration of the structural integrity of the metal,
necessitating frequent and costly replacement of the rotor.
individual ?laments which are acted upon by the serrations
on the rotor periphery, and as said ?laments leave the
rotor they are intercepted by a high velocity blast 32 of
preheated air, gas, or steam emitted from a ring 25
mounted above said rotor. The direction of the ?laments
It has been found, however, that rotors formed of ceramic
materials are also subject to de?nite objections. Such 30 is abruptly changed by said jets, and the ?laments are at
tenuated thereby into the ?ne ?bers required in mineral
ceramic materials tend to dry ‘out and crack in a relative
ly short time, ‘and in addition, the ?ber-forming surfaces
wool and similar products.
of such rotors are quickly worn away by the erosive action
The Structure
of the molten glass.
Unlike
conventional
rotors, which are formed at least
35
With the above considerations in mind, one of the prin
partly of ceramic or refractory insulating material, the
cipal objects of the present invention is to provide a ?ber
rotor comprising the present invention is formed entirely
izing apparatus for use in manufacturing mineral W001 and
of metal, which is made possible by a novel cooling sys
the like, wherein the rotor is formed of a hard, wear-re
tern which will be hereinafter described. It has been
sistant metal alloy, there being means therein for cooling
the rotor during the ?berizing operation in order to pre 40 found that an alloy consisting of chromium, nickel, and
cobalt is very satisfactory but other metals ‘or alloys might
vent structural deterioration of the metal.
be preferred for certain purposes and the particular metal
A further object of the present invention is to provide
employed is not critical to the invention.
a rotor assemblage wherein the components can ‘be sep
Referring now more particularly to FIG. 1 of the draw
arately detached and replaced in the event they become
ing, the improved rotor assemblage includes a generally
worn or broken, thereby eliminating the necessity of re
cylindrical base member 37 positioned below the lower
placing the entire rotor.
end of the delivery tube 13 and operatively mounted on
A further object is to provide a ?berizing apparatus hav
a drive shaft 36. Mounted on and in spaced relation
ing molten material delivery means adapted to partially
above said base member is a rotor head 39 having a
separate and attenuate the material before it is deposited
dished top surface 4-2 adapted to receive the molten ma
on the rotor, thereby promoting complete ?berization and
terial and having a plurality of radial grooves 43 to pro
minimizing the occurrence of imperfect ?bers or slugs in
mote the formation of the material into ?laments as the
the ?nished product.
same moves toward the rotor periphery. Said rotor
A further object of the present invention is to provide
head and base members 39 and 37 are separably con
a ?berizing apparatus wherein the temperature and viscos 55 nected by bolts 49, and a number of washers 41 are in
ity of the molten material can be effectively controlled
terposed between said rotor members to maintain the
during the ?berizing operation, thereby insuring that the
same in their spaced relation. The spaced mounting of
?bers produced are of a consistently ?ne variety.
said rotor members permits cooling air to pass there
Further objects of the present invention are to provide
between during operation to prevent overheating and is,
a ?berizing apparatus as above described which is relative
of course, an important feature of the invention. In
ly simple in design and construction, which is e?icient .in
addition, and as will be seen in FIG. 5, the washers 41 in
operation, and which is capable of producing an unusually
terposed between said rotor base and head members are
high quality product.
formed with peripheral projections 51 which are designed
With the above and other objects in view, the inven
to function as small fan blades as the apparatus rotates
tion consists of the improved ?berizing apparatus for use
to promote the circulation of air between said members.
in manufacturing mineral wool and the like, and all of its
Air also circulate below the rotor part 39 in the hollow
parts and combinations as set forth in the claims, and all
chamber ‘60 which has holes 61 communicating with the
equivalents thereof.
exterior.
In the accompanying drawing, illustrating one complete
Referring again to FIG. 1, it will be seen that not only
embodiment of the preferred form of the invention, and 70 are the metal rotor base 37 and head member 39 mounted
wherein the same reference numerals designate the same
in spaced relation, to promote cooling as described, but
parts in all of the views:
the rotor head is formed with a plurality of channels 53
span-see
3
4
extending horizontally therethrough to carry heat from
the rotor interior outwardly to the atmosphere, thereby
further lessening the possibility of overheating and de
A further advantage in the improved apparatus is pro
vided by the serrated annular rim‘member which, in addi
tion to being part of the rotor cooling system, also func
terioration of the metal.
tions as a supplementary ?ber attenuating means which
Surrounding the rotor head 39 is an annular rim 45
will last longer than the grooves 43 on the rotor proper.
Finally, the fact that the component parts of the present
structure can be separately detached and replaced elimi
nates the necessity ‘for removing and replacing the entire
which rim is removably secured to the rotor by means of
apparatus in the event of damage, and contributes to the
specially-designed bolts 47 having longitudinal openings
48 therethrough. In addition to securing the rim 45 in 10 increased utility of the invention.
It is to be understood that variations or modi?cations
place on the rotor head, said hollow bolts also function
of the apparatus hereinabove described may suggest them
to convey heat outwardly from the rotor interior.
selves to those skilled in the art, ‘and all of such variations
‘The inner surface of the rim member 45 is provided
of a larger diameter than the external diameter of said
rotor head, there being an air space 46 therebetween,
with spaced, obliquely-angled blades 49 (FIGS. 3 and
or modi?cations are contemplated as may come within
4), and the upper edge 50 of ‘said rim has a multiplicity 15 the scope of the following claims.
What we claim is:
of serrations. In the operation of the rotor, said angled
1. A metal rotor for use in a ?berizing apparatus, com
blade members 49 on the rim inner surface provide a fan
prising: a rotatably mounted base; a rotor head mounted
action to draw air through the rotor cooling channels and
on and spaced above said base and having a peripheral
to forcibly direct heat ‘from around the rotor upwardly
wall of substantial depth, said rotor head having interior
through the annular space 46. As the molten material
cooling channels extending to said peripheral Wall; a rim
?laments leave the periphery of the rotor as hereinbefore
described, they are intercepted by said current of hot air
and precooling of said ?laments is prevented prior to
their engagement by the steam jets 32. In addition, said
upwardly directed air currents from the fan blades 49 in
surrounding said peripheral wall of the rotor head and
rotatable therewith, there being an annular space there
between; and fan means on said rim in said annular space
for drawing air through said rotor head cooling chan
nels into said annular space.
the annular space 46 function to lift the ?laments suffi
2. A metal rotor for use in a ?berizing apparatus, com
ciently to insure that they pass over the serrated edge
prising: a rotatably mounted base; a rotor head mounted
Silof said annular rim member where they are acted
on and spaced above said base and having a periphery;
upon by the serrations to aid in obtaining a desirable
?neness of product. It has been found that said rim 30 a plurality of spacing members interposed between said
base and rotor head near the periphery of the latter to
serrations substantially outlast the serrations on the rotor
maintain the same in spaced relation; and peripheral
proper, and remain effective even after the rotor surface
projections on said spacing members forming fan blades
has become worn or eroded, thereby increasing the life
of the apparatus and enhancing its utility.
when the rotor is in operation.
3. In a ?berizing apparatus, a metal rotor structure
As' hereinbefore mentioned, the improved apparatus
comprising: a rotatably mounted base; a rotor head
is also provided with special means for separating the
mounted on and spaced above said base and having a
molten material into a multiplicity of individual streams
peripheral wall of substantial depth, said rotor head hav
before the same is fed onto the rotor, to enhance the
ing interior cooling channels extending to its peripheral
?berization of the material. In this respect, and referring
wall; spacing members interposed between said base and
to FIG. 1 ofthecdrawing, formed in the center of and
rotor head near the periphery thereof to maintain the
projecting upwardly from said rotor top surface is a
dome 44, there being any open-top, bowl-like member 33
mounted'on its upper end portion, the lower margin of
said bowl being provided with a multiplicity of down
wardly angled apertures 34. The lower open end of the
delivery tube-13 projects into said bowl 33 and is posi
tioned to discharge the stream of molten material 52
onto the dome 44, the material being thrown thereby
through the downwardly, angled apertures 34 onto the
dished upper surface 42 of the rotor. Said coacting dome 50
and bowl units not only promote the even and uniform
distribution of the molten material on the surface of the
same in spaced relation, said spacing members having
peripheral projections thereon forming fan blades when
the rotor is in operation; a rim surrounding the periph
ery of said rotor head and rotatable therewith, there be
ing an annular space therebetween; and fan means on said
rim in said annular space to draw air through said rotor
head cooling channels into said space.
4. ‘In a ?berizing apparatus, a metal rotor structure
comprising: a rotatably mounted base; a rotor head
mounted on and spaced above said base, said rotor head
having a dished, molten'material receiving upper surface
with a multiplicity of fiber-forming peripheral serrations;
rotor, but the passage of said material through the aper
a rim surrounding said rotor head, there being an annular
tures 34 preforms the material into individual streams
and minimizes the possibility of uniformed globules or 55 space therebetween, said rim ?xed to said rotor for rota
slugs in the ?nished product.
tion therewith and having a multiplicity of ?ber-forming
Summary
serrations on its upper edge; and means on said rim
providing a fan action when the rotor is in operation to
dissipate heat from around said rotor.
From the foregoing detailed description, it will be
5. In a ?berizing apparatus, a metal rotor structure
appreciated that the present invention provides an im 60
comprising: a rotatably mounted base; a rotor head
proved apparatus for manufacturing glass ?bers or the
mounted on said base having a dished, material-receiving
like having several new and advantageous features. First,
top surface; a dome projecting upwardly from the dished
due to the novel cooling system incorporated therein, the
top surface of said rotor head; and a bowl mounted on
entire apparatus comprising the present invention may be
an intermediate portion of said dome spaced above said
formed of metal, and it is no longer necessary to employ
material-receiving surface to receive molten material
ceramic or other refractory insulating materials which
deposited on said dome and having apertures there
are quickly worn or deteriorated by the intense heat and
erosive action of the molten glass. By substituting metal
through arranged to direct the molten material onto the
for a refractory material, a hard, wear-resisting surface
top surface of said rotor head in a plurality of individual
is provided and the useful life of the apparatus is sub— 70 streams.
stantially‘increased. Secondly, the present improved ap
‘6. In a ?berizing apparatus including a delivery mem
paratus 'has means thereon for separating and attenuating
ber for molten material leading from a melting furnace
the molten material before the same is deposited on the
and having a lower discharge end, a metal rotor struc
rotor, thereby ensuring the production of high quality
ture comprising: a base rotatably mounted below said
?bers.
75 delivery member lower discharge end; a cylindrical rotor
aosaase
5
head mounted on and spaced above said base, said rotor
6
9. In a ?berizing apparatus a rotatably mounted base,
head having a plurality of cooling channels therethrough
a rotor head mounted on an spaced above said base to
and a dished molten material receiving upper surface; an
annular rim surrounding said rotor head, there being an
annular space therebetween, said rim having a serrated
provide a cooling space therebetween, said rotor also
having interior air channels and having a peripheral wall
of substantial depth, the mounting for said head including
spacing members between said base and rotor head having
top edge; a plurality of spaced obliquely angled fan
peripheral projections forming fan blades when the rotor
blades on the inner surface of said rim; and a plurality
is in operation, and a band-like rim surrounding the pe
of hollow bolts securing said rim to the rotor head.
riphery of said rotor head and rotatable therewith, there
7. In a ?berizing apparatus including a delivery mem
ber for molten material leading from a melting furnace 10 being an annular space between said rim and the periphery
of the rotor head with which the interior air channels of
and having a lower discharge end, a metal rotor structure
the rotor head communicate.
comprising a base rotatably mounted below said delivery
10. In a ?berizing apparatus including a delivery mem
member lower discharge end; a cylindrical rotor head
mounted on and spaced above said base, said rotor head
ber for molten material leading from a melting furnace
having a plurality of cooling channels therethrough and 15 and having a lower discharge end, a metal rotor structure
comprising: a base rotatably mounted below the lower
a molten material receiving upper surface; spacing mem
discharge end of said delivery member; a cylindrical rotor
bers interposed between said base and rotor head to
head mounted on and spaced above said base, said rotor
maintain the same in spaced relation, said spacing mem
head having a plurality of cooling air channels there
bers having peripheral projections thereon forming fan
through and having a dished molten material receiving
blades when the rotor is in operation; an annular rim sur
upper surface; an annular rim surrounding said rotor head,
rounding said rotor head, there being an annular space
there being an annular space therebetween; a plurality of
therebetwecn, said rim having a serrated top edge; a
spaced obliquely angled fan blades on the inner surface
plurality of spaced obliquely angled fan blades on the
of said rim in said annular space; and a plurality of bolts
inner surface of said rim; a plurality of hollow bolts
securing said rim to the rotor head; a dome projecting 25 securing said rim to the rotor head.
upwardly from the dished upper surface of the rotor;
and a bowl mounted on the upper portion of said dome
References Cited in the tile of this patent
to receive molten material deposited thereon and having
UNITED STATES PATENTS
apertures arranged to direct the molten material onto the
rotor upper surface in a plurality of individual streams.
8. A rotor for use in a ?berizing apparatus comprising
a rotatably mounted base, a rotor head of metal mounted
on and spaced above said base and having a peripheral
2,192,944
Thomas ____________ .._ Mar. 12, 1940
2,603,833
2,609,566
2,624,912
Stalego et al. _________ __ July 22, 1952
Slayter et a1 ___________ __ Sept. 9, 1952
Heymes et a1. ________ __ Jan. 13, 1953
wall of substantial depth, there being air channels in the
interior of said head extending to said peripheral wall, 35
and a band-like rim connected in spaced relationship with
the peripheral wall of the rotor head for rotation there
with, there being an air circulating space of substantial
depth between said rim and rotor periphery with which
40
said air ducts communicate.
2,784,451
2,839,782
Bowen ______________ __ Mar. 12, 1957
Tillotson _____________ __ June 24, 1958
751,261
Great Britain __________ __ June 27, 1956
FOREIGN PATENTS
753,378
Great Britain _________ __ July 25, 1956
788,491
Great Britain _________ __ Jan. 2, 1958
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