close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3076249

код для вставки
Feb. 5, 1963
3,0 76,240
5. N. SCHLEIN
RADIUS CHILL
Filed June 10, 1960v
l/
/.0
/0
//
l/
//
/0
//
//
INVENT OR. .
Seymoa» 1Y- Sch/e141
HIS ATTORNEY
United States Patent 0 " "ice..
1
3,076,240
Patented Feb. 5., 1963
2
FIG. 4 is a cross section of the chill of FIG. 2. after ?nal
3,076,240
Seymour N. Schlein, University Heights, Ohio, assignor to
formation; and
RADIUS CHILL
'
FIG. 5 is an isometric view of a modi?cation thereof.
In the drawings like parts have been designated by
The Fanner Manufacturing Company, a Division of
like reference characters.
Textron, Inc., Cleveland, Ohio, a corporation of Rhode
Island
Filed June 10, 1960, Ser. No. 35,371
1 Claim. (Cl. 22--174)
'
Brie?y, the invention constitutes ‘rolling a strip of
metal into channel formation having a pair of parallel
legs, one on each edge of the channel, and then forming
the channel shaped strip to a radius transversely of the
strip.
This invention relates to chills and more particularly
to a foundry chill of the so-called external radius type.
As is well known to those versed in the art, metal chills
are frequently used in molds to chill the metal at points
where the metal is slow to chill and thus equalize the
As best shown in FIGS. 2 and 3, a strip of metal of the
desired structure is formed, preferably by rolling to pro
vided with ‘integral stems, the holding power of these
sure to cause the pieces to bow outward.
vide a body 10- and a pair of marginal anges 11, which
extend from each side of the body. It will be appreciated
cooling process through the casting to thus avoid cracks 15 that rolling is preferred since it causes the stock to have
due to uneven cooling. It is also common :to provide
a smooth surface, which is particularly desirable on the
what is known as an external radius chill, that is, one
outer face. The rolling may be effected in roller dies, at
that does not merge with the casting and which is used
which time the ?anges 11 are also ?ormed. It will be
particularly to chill inside corners of the castings.
noted that the ?anges are tapered, becoming thinner to
Since the mold, which makes an inside corner, is neces 20 ward their outer edges.
sarily provided with a complementary outside corner,
After the stock is rolled, it may be severed into the
when it is desired to supply a chill, the chill has been
desired lengths. The short lengths Iare then placed in a
' placed on the outside corner and held in place by nails
bending machine and bent to the shape shown in FIG. 4.
inserted through the chill into the sand forming the
The bending may be effected in many ways such as by
corner. Althoughnsome external radius chills are pro 25 dies or ‘by subjecting the edges and the center line to pres
was not too good because it was impractical to provide
Preferably the bending is such as to bring the legs
enough stems and further because there was not enough
of a body of sand at this point.
inward on a radial angle to the circumference.
It will be appreciated that the curvature can be varied
The chills with the holes provided several disadvantages 30 by more or less bending as desired.
among which were the fact that the insertion of the nails
As shown in FIG. 4, the stock may be made in various
disturbed the sand in the mold. Furthermore, if all the
nail holes were not used, the metal would run into the
holes sometimes even fusing with the chill. This re
thicknesses, that of FIG. 1 being for a Ms" thick body
and FIG. 4 being a 1A” thick body. It is also con
cost due to labor necessary to smooth the casting at that
and is packed in on the concave side and between the
templated that bodies 1-716” thick will be made.
quired that the chill be chipped off of the casting, leav 35
In use, the chill is placed in the core box in the de
ing a rough surface on the casting and increasing the
sired position, and the sand is blown into the core box
legs. Usually the legs are completely embedded in the
The chills having the integral stems were expensive to
sand.
make because they had to be cast. These with attached 40
With the legs embedded in the sand and the outer con
point.
r
stems were expensive to make because the stems had to
vex surface forming the corner of the mold, the corners
be attached separately. The cast chill-s also provided a
of the sand are reinforced, the legs or ?anges gripping
the sand for the complete length of the chill. During
rough surface, which did not allow the chills to be readily
or easily separated from the casting and also provide a
operation the reinforcement for the corner also prevents
45 the corner from being washed away by the molten metal.
rough surface on the casting.
One of the greatest disadvantages resided in the fact
Due to the smoothness of the chill, the chill does not ad
that chills with stems whether they be nails or integral
here to the casting. Since there are no holes in the chill,
stems provided a natural cleavage plane for the sand
there is an even chilling of the metaland the metal does
which caused the sand to break, especially on the outside
not enter into the holes and require a subsequent chip
corners and the chill to fall off after the mold was as
ping or grinding operation.
sembled.
It will be apparent that the manufacturing of the chill
By my present invention, I have provided a rolled
is much cheaper because there are ‘only a rolling and a
steel chill having a means for holding it in the sand which
bending operation and no waste metal from the opera
not only does not break up the sand but actually causes
tion is realized. It‘ is also possible to make the parts
the outside sand corners to be substantially reinforced. 55 much faster and without the need for expensive ma
A rolled steel chill has the further advantage that the
chinery.
chilling surface can be made very smooth, eliminating the
FIG. 5 illustrates a modi?cation of the chill wherein
need for subsequent machining operation.
the ?anges or legs :11 have been omitted from the sides
Furthermore, by my method of manufacture I can
‘and end ?anges 15 are provided which may extend into
not only make the chills better, but faster and materially 60 the sand.
cheaper than previous chills.
In this instance the body would vbe rolled ?rst and then
Still other advantages of the invention and the inven
the flanges 15 provided by bending over the ends. As
tion itself will become more apparent from the follow
in the other embodiments, the sand packs into the in
ing description of ‘an embodiment thereof which is i1
terior or hollow surfaces.
65
lu-strated by the accompanying drawings and forms a part
Having thus described my invention in an embodiment
of this specification.
thereof, I am aware that numerous and extensive de
In the drawings:
partures may be made therefrom without departing
from the spirit of the invention as de?ned in the ap
FIG. 1 is an isometric view of a chill of my invention;
FIG. 2 is a cross sectional view of a chill at one stage
of its manufacture;
FIG. 3 is a cross sectional view of a chi-ll at the stage of
FIG. 2, showing a modi?cation thereof;
70
pended claim.
'
I claim:
A chill comprising a body of semi-cylindrical forma
tion on the exterior and interior surface, retaining
3,076,240
4
3
?anges on the longitudinally extending edges of said
body extending the full length of the body, said ?anges
projecting inwardly toward each other and being coex
tensive with ‘the ‘longitudinally extending edges of said
body.
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,618,016
Leek _______________ _.. Feb. 15, 1927
1,937,663
2,731,688
2,799,317
2,879,565
Norton _______________ __ Dec. 5, 1933
Jenkins ______________ __ Ian. 24, 1956
Toulrnin ____________ __ July 16, 1957
Holfelder et a1. ______ __. Mar. 31, 1959
Документ
Категория
Без категории
Просмотров
0
Размер файла
239 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа