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Патент USA US2129821

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Sept. 13, 1938.
w. M. CHARMAN
2,129,821
BOTTOM RING FOR HOT TOPS
Filed Jan. 28, 1931
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‘Patented Sept. 13, 1938
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UNlTED STATES a
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BOTTOM RING ron nor were
Walter M. ?lial-man, Cleveland Heights, Ohio
Application January 28, 1931, Serial No. 511,733
12 Claims. (Cl. 22-44:?)
This invention relates to bottom rings for-hot
Other-objects and features of novelty will ap- »
tops, and has‘reference particularly to improve»
ments in non-?oating hot tops of that class in
which metal casings are employed. Such hot
5 tops rest upon the ingot mold during the pouring
pear as I proceed with the description of those
embodiments of the invention which, for the pur
poses of the Present application, I h?Ve.i11i1S
trated in the accompanying drawing. in which
5
operation, and may or may not be anchored to
the mold. The joint between the casing and the
hot top must be relatively tight in order to prevent molten metal from entering it. Consel0 quently part ‘or all of the upper surface of the
ingot mold is usually machined, and the lower
Figure 1 is a Vertical Sectional View Of a hot ‘top
and 8- fl‘algmeht 0f the upper end of an ingot mold
in connection with which my invention is em
liloyed"
Fig. 2 is a similar view with the pad and lining Iii
element added
for the purpose of truing up these two surfaces
, to meet throughout their extent. In spite of
15 these precautions molten metal sometimes finds
its way into the joint, solidifies and then tends
of the bottom ring.
Fig. 4 is a cross sectional view taken substan
W111}! 011 the line “4' of Fig- 3, and
15>
. Fla 5is a detail elcvational view of a fastening
end surface of the hot top is likewise machined,
Fig. 3 is a frasmental plan view of one corner
to “hang up” the ingot thereby interfering'with
whlchtmay be employed for holding the bottom
its natural shrinkage during cooling, and serves
to weld the two surfaces together_
20
A portion of the lower end of such a‘casing is
ring '60 the casing
In the drawing a fragment of an ingot mold is
illustrated at it, having a rabbet H with a trued as
also necessarily exposed to the molten metals
upper Surface formed Preferably by machining
poured through the hot top, After a, series of The mold may have a cavity of any desired‘ cross
operations this exposed ‘metal is adversely af- ' sectional form; as‘ for instance approximately
fected and, in the course of time, becomes pitted - rectangular, approximately round, ?uted Or the
‘.15 and cracked to such an extent that the pro-
like-
tuberances and ?ns on the ingot resulting from
the flow of metal into such inequalities, interfere considerably with the operation of stripping
the hot top from the ingot and ?nally make a,
30 new casing necessary. By the use of my invention however the casing proper has an indefinite
life, and the part which is to be replaced is relatively small and of relatively low cost.
I
B150 an inwardly extending upper ledge I4.
one of the ‘objects of the invention therefore
35 is the provision in a hot top of the non-?oating
type of means for protecting the lower end of
the hot top casing, which means shall be remov-
The
tie!‘ is Supported Wholly 01‘ partially upon the
Another object is the provision of securing
40 means for the removable section adapted to fail
when subjected to unusual strains such as are
exerted in separating the hot top from the mold
when these two parts tend‘to stick together on
account of the welding action of molten metal
45 above explained, or my stripping the hot top from
the ingot when adherence between them becomes
strong due to the metal entering the inequalities
,
25
inner wall of the casing between these two ledges
is covered with a heat insulating lining which, 35
in the Present instance, takes the form Of two
tiers of refractory blocks l5 and It. The lower
able and replaceable when occasion demands.
of the bottom ring,
'
The casing of the hot top Shown at '2 15 0f
iron 08st ill-One 01‘ a plurality of parts- If the
casing 18 not made in One piece its 138-1155 are bolted
or otherwise secured together in a more or less
permanent fashion. The casing comprises a 30
lowel‘klhwal‘dly extending ledge l3 running Pref
embly entirely around the casing, and may have
,
ledge 13'
Here'liofol‘e it has been the practice to machine 4i)
the lower end Surface of the hot top casing, 001‘
responding tothe lower surface of ledge 13 of the
Present disclosure. and let it rest upon the ma
chined surface of the ingot. In accordance with
myv invention however the lower end of the 025- as
mg Propel‘ may 01' may not be machined, f0!‘ ll; is
covered by an auxiliary ledge member I‘! which
is interposed between the mold and the casing
Still another object of the invention is the pro'12. This auxiliary member extends under the
50 vision of a yieldable pad or gasket between the , ledge i3 and protects the entire lower and inner 50
hot top casing and ingot mold in order to e?ect surfaces thereof. It has an inner rim portion
a good seal for this joint, and preferably an exwhich stands ?ush with the upper surface of
tension of this pad or gasket inwardly and up- ledge l3, and may assist that ledge in the support
wardly to‘constitute a lining for a portion of the of the blocks l5. This inner rim portion also
'55 hot top as a protection for the inner wallthereof. stands flush or, nearly ?ush with the inner sur- 66
2
2,129,821
face of lining blocks IS. The ledge member I‘!
may be machined on its lower surface, and on
account of its relatively small size the machining
may be more easily effected than could be the
machining of the casing proper. The auxiliary
ledge is preferably made as an annulus in a single
These fastenings are arranged at intervals
throughout the perimeter of the hot top, and in
the case of rectangular hot tops they are gener
ally placed at the corners, as indicated in Fig. 3.
When the auxiliary ledge member H is attached
to the casing l2, this assembly constitutes a me
tallic casing. Consequently, the term “metallic
casing”, as hereinafter used, is/to be considered
as_ descriptive either of the casing l2 alone or of
piece, but obviously may be constructed of a plu~
rality of pieces if desired. It is detachably
mounted upon the casing by suitable means such
10 as willhereinafter be described in connection -. the assembly of that casing with the ring |‘|.
with the form of the invention illustrated in
So long as a ring |'l, used as disclosed in Fig. 1,
Fig. 2.
’
remains relatively new, and particularly if its
In the latter ?gure the annular auxiliary ledge inner surface is coated with a suitable parting
member I‘! is the same as in Fig. 1, except that compound, the hot top may be stripped from the
15 it is provided with a series‘of holes for the recep
mold without any considerable di?iculty. After
tion of plugs l8, made preferably of wood. These the metal of this ring has become pitted and
plugs are renewed after each heat and are put cracked however, due to repeated contact with
in with a driving ?t. After they are in place a molten metal, the stripping of the hot top be
non-in?ammable annular gasket and lining mem
comes increasingly difficult. The ring should
20 ber I9, made preferably although not necessarily ‘
then be removed and a new one put in its place.
in one piece, and formed to ?t snugly, is pushed In the event that such replacement is delayed
into place covering the lower end surface of the too long, or in the event that molten metal ?nds
ring l1 and extending over its inner surface its way into the joint between the ring and the
exposed to the molten metal and up over the joint rabbet ll of the mold, welding these‘two parts
25 between the ring and the blocks |5.> Nails 20
together, it may become practically impossible
with large heads are then driven through the to strip the ring |‘| from the ingot. 'The force
member 19 into the plugs I8, thereby securing applied to pull‘ the hot top away from the ingot
the member Hi to the hot top. when the molten will then cause the wedges 23 to cut through the
metal is poured the plugs I8 become charred and metal at the upper ends of pins 2|, and the casing
30 lose their grip upon the nails 20, so that when
|2 will then part from the ring ll, carrying the
the hot top is stripped from the ingot the mem
lining blocks l5 and IS with it. Where the addi
ber l9 remains upon the ingot, affording an ’ tional lining member and gasket I9 is employed
excellent parting surface. Other means, adapted “ however, the ring ll 'will have a much greater
to fail when the not top is stripped from the mold, life and there will seldom be any breaking away
35 may of course be substituted for that described
of the ring H from the casing. The member Is
without departing from the invention, or the also, of course, possesses the same advantages
member I9 may be held in- place by friction whether or not there is a replaceable lower ring
alone.
.
*
By the term “non-in?ammable” as herein ap
40 plied to the member I! I intend to include any
material which will not burn or which will burn
,with di?iculty, ?brous material being preferred.
This material should also be somewhat resilient
or yielding so as to form a gasket seal between
45 the ring I‘! and the horizontal surface ofrabbet
II, and to this end is shown on the drawing as
corrugated board, whereby the hot metal is pre
vented from ?owing into this joint, hanging up
the ingot, and producing shrinkage cracks
therein.
'
The ring ll, regardless of whether or not it be‘
covered at each pouring with the combined gas
ket and lining member l9, may be attached to "
the casing l2 ‘by removable fastenings which are
55 adapted to fail under heavy strains. . This is not‘
so essential in. the form of the invention shown
in Fig. 2, as in that shown in Fig. 1, but is always
desirable.
The means " herein illustrated for
securing the ring in this manner is shown and
60 claimed in my copendlng application, Serial No.
‘for the casing.
.
15
20
25
80
'
Having thus described my invention, I claim:
1. In combination, a hot top adapted- to rest
upon the upper end of an ingot mold, said hot
top comprising a metallic casing having a lower
ledgefor the support of lining members, a me
tallic member covering the lower end~ of the eas
ing so as to engage the mold when ‘the hot top
is supported thereon, and means for detachably
securing said metallic member to said casing.
' 2. In combination, a hot top casing having a
lower ledge for the support of lining members, a
metallic 1.. ember covering the lower end of the
casing having a lower, surface adapted to con 50
form with and to rest upon a trued upper surface
of an ingot mold, said metallic member extend
ing inwardly beyond the inner casing wall, and
means for detachably securing said member to '
55
_
-
said casing.
3. In combination, a-hot top casing having an
inwardly extending ledge at the bottom thereof,
a renewable metallic member covering the lower
and inner surfaces of said ledge, the lower sur- ‘
511,732,‘ ?led January 28, 1931, and consists of
headed pins 2| mounted with their heads down
face of said member adapted to conform with and 60
in slots 22 formed in the ring II. The pins 2| are
- projected through holes drilled in the ledge IS in
mold,,and means for detachably securing-said
member to said casing.
4. In a hot top adapted to rest uponthe upper‘
end of an ingot mold, a metallic casing having a 65
65 positions to register with the slots 22, and wedges
23 are then driven through slots in the pins 2|
so positioned that the wedges may bear upon
the upper surface of the ledge. When an auxili
ary ledge is detached from or applied to the cas
70 ing,,the lining blocks or a portion of them are
removed, this work’being done preferably with
the casing ‘in an inverted position. vCertain of
the blocks are chipped away, as indicated at 24,
at their lower outer edges in order to make room
for the wedges 23 and the upper ends of pins 2|.
to rest upon a trued upper surface of an ingot
lower inwardly extending ledge, lining elements
supported thereupon, and a non-metallic, non!
in?ammable yieldable strip covering the lower
end surface; of the hot top and extending upwardly for a distance over the inner-surface of
said liningelements, the lower portion of said
strip being adapted to separate the hot top from
the mold and form a seal between them.
-5. In a hot topyadapted to rest upon the upper
3
2,129,821
end of an ingot mold, a metallic casing having
a lower inwardly extending ledge, lining elements
supported thereupon, a renewable metallic mem
ber covering the lower and inner surfaces of said
ledge, and a non-metallic, non-inflammable,
yieldable strip covering the lower surface of. said
renewable member and extending upwardly for
a distance over the inner surfaces of said lining
elements, the lower portion of said strip being
10 adapted to separate the hot top from the mold
andform a seal between them.
6. The herein described ingot mold assembly
comprising upper and lower ‘ingot mold ele
ments matching horizontally to form a continu
15 ous mold cavity a substantial portion of which is
within the lower mold element, and a highly
compressible sealing layer of cellular ?brous ma-'
terial combustible under temperature conditions
existing during the teeming of. an ingot lying
20 horizontally between the adjacent surfaces of
the lower and upper mold elements.
‘
during the teeming of. an ingot lying horizontally
between the lower and upper mold elements.
9. The herein described ingot mold assembly
comprising upper and lower mold elements, the
lower mold element constituting a support and :1
closure for the upper mold'element, and a highly
compressible sealing layer of cellular ?brous ma
terial combustible under temperature conditions
existing during the teeming of an ingot lying
between the adjacent surfaces of the lower and 10
upper ‘mold elements.
-
10. The herein described ingot mold assembly
comprising an ingot mold divided horizontally
into a plurality of ingot mold elements, and a
thin sealing layer of corrugated board combus
tible under temperature conditions existing
during the teeming of an ingot lying horizontally
between adjacent faces of the mold elements.
11. The herein described ingot mold assembly
comprising an ingot mold divided horizontally 20
into a plurality of ingot mold elements, and a
_
highly compressible sealing layer of cellular
7. The herein described ingot mold assembly >?brous material combustible under temperature
comprising upper and lower ingot mold elements conditions existing during the teeming of an
matching horizontally to form a contlnuousmold ingot. lying horizontally between adjacent sur 25
25 cavity a substantial portion of which is within
the lower mold element, and a compressible
sealing layer of corrugated board combustible
under temperature conditions existing during the I
teeming of an ingot lying horizontally between
30 the adjacent surfaces of the lower and upper
mold elements.
8. The herein described ingot mold assembly
comprising upper and lower mold elements, the
lower mold element constituting a. support and
closure for the upper mold element, and a com
pressible sealing layer of corrugated board com
- bustible under temperature conditions existing
faces of themold elements.
12. In a hot top adapted to be organized with
an ingot mold, to provide a continuation of the
mold cavity, which hot top includes a surface
area which, in assembly with the mold'lies ad 30
jacent the face of the mold, the combination of
a gasket member located against said surface
area, said gasket member being formed of pulpous
material and being cellular in structure, 'so as
to provide a plurality of air cells between said 35
surface area and the adjacent face of the mold.
WALTER M. CHARMAN.
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