Improvements in the Method of and Chills for Making Chilled Castings.
Year: 1894

page_text: Date of Application, 28th Apr., 1894-Accepted, 7th July, 1894
COMPLETE SPECIFICATION.
Improvements in the Method of and Chills for Making Chilled
Castings.
We, HUBERT SCHON, Moulder, of Apollo, in the County of Armstrong and
State of Pennsylvania, United States of America, and GEORGE MUTH, Baker,
of 33 Second Street, Alleghany City, in the County of Alleghany and State of
Pennsylvania, United States of America, do hereby declare the nature of our
invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The object of the invention is to provide a new and improved method and chill
for making chilled castings, in such a manner as to obtain more uniform chilling
of the metal throughout, and to prevent tearing or bursting of the castings or
chills.
The invention consists principally of a method for forming chilled castings, the
method consisting in first filling the hollow chill with steam and water to heat
the chill, then pouring the metal into the chill, and then gradually decreasing the
temperature of the chill by circulating cold water through the same.
The invention further consists of a chill comprising a mould surrounded by a
series of cooling chambers, and annular water spaces connected by ports with the
said cooling chambers for circulating hot or cold water or steam throughout
the latter.
The invention also consists of certain parts and details, and combinations of
the same, as will be fully described hereinafter, and then pointed out in the
claims.
Reference is to be had to the accompanying drawings forming a part of this
Specification, in which similar letters of reference indicate corresponding parts in
both the figures ;
Figure 1 is a sectional side elevation of the improvement on the line 1-1 of
Figure 2; and
Figure 2 is a sectional plan view of the same on the line 2-2 of Figure 1.
The improved chill shown in the drawings is arranged for forming chilled solid
rolls, but other articles can readily be made by changing the form of the mould.
The improved chill is provided with the mould A, of any desired shape or form
corresponding to the article to be cast. This mould A is surrounded by a series
of cooling chambers B, each connected at its lower end by a port C, with an
annular water-way D, into which discharges a pipe E, connected with a suitable
source of water supply and provided with a branch pipe E', connected with a
source of steam supply, so that either cold water or water and steam can be passed
through the pipe E into the said annular water-way D, and from the latter through
the ports C into the chambers B. Each of the latter is connected at its upper
end, by a port C¹, with a second annular water-way D', located directly above the
water-way D, and provided with an outlet pipe F, for carrying off the water and
steam after it has circulated through the chill.
The cooling chambers B are separated from each other by cored spaces G,
extending from the top to the bottom of the chill, so that air can circulate or
pass through the same. The walls of the mould A are sawn or otherwise cut, as
at H, so that the cut extends into the corresponding spaces G, from the top to the
bottom of the chill. By this arrangement the chill is prevented from bursting,
as it can readily expand and contract between individual cooling chambers B.

page_text: In using the chill the operator first opens the valve E' in the water supply pipe E,
and also a valve E³ in the steam supply pipe E', to permit water and steam to pass
into the lower water-way D, the water becoming heated by the steam, and passing
from the annular water-way through the several ports C into the chambers B, to
finally pass out through the ports C' into the annular water-way D₁, and from the
latter through the pipe F to a discharge receptacle.
It will be seen that by circulating hot water and steam through the chill as
described, the latter is heated, and then the molten metal is poured into the mould A
to form the casting, after which the operator closes the valve E' to shut off the
steam and to permit only cold water to circulate through the chill in the manner
above described.
It will be seen that as the chill had been filled with hot water, the incoming cold
water gradually displaces the hot water and steam, so that the chill is gradually
cooled by the circulation of the cold water through the chill, and, as the entire
mould is surrounded by the chambers B, the molten metal in the mould A will
be gradually cooled and chilled throughout, so as to produce a uniform chilled
casting.
It will further be seen that the degree of hardness of the casting can be readily
regulated by the operator manipulating the valves E2, E, so as to gradually change
the temperature of the water circulating through the chill.
If it is desired to chill the molten metal very strongly, then the steam is shut
off suddenly by totally closing the valve E', but when it is desired to produce a
casting of a less chilled degree, then the steam is gradually shut off by the operator
manipulating the valve E³ accordingly.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is,-
1. The herein-described method for forming chilled castings, consisting in first
filling the hollow chill with steam and water to heat the chill, then pouring the
metal into the heated chill, and then gradually decreasing the temperature of
the chill by circulating cooler water through the same, substantially as shown
and described.
2. A chill comprising a mould, a series of cooling chambers surrounding the
said mould, and annular water-ways connected with the said cooling chambers
to circulate water and steam through the latter, substantially as shown and
described.
3. A chill provided with cooling chambers separated from each other by cuts in
the inner face of the mould, substantially as shown and described.
4. A chill, comprising a mould surrounded by a series of cooling chambers
separated from each other by cuts in the inner face of the mould, substantially as
shown and described.
5. A chill, comprising a mould surrounded by a series of cooling chambers,
annular water-ways connected by ports with the said cooling chambers to circulate
water through the latter, and air spaces or channels for separating the cooling
chambers from each other,. substantially as shown and described.
6. A chill, comprising a mould surrounded by a series of cooling chambers,
annular water-ways connected by ports with the said cooling chambers to circulate
water or steam through the latter, and a pipe discharging into one of the said
water-ways and connected with a water supply, the said pipe being provided with a
steam supply pipe connected with a steam supply, substantially as shown and
described.
7. A chill, comprising a mould surrounded by a series of cooling chambers,
annular water-ways connected by ports with the said cooling chambers to circulate
water or steam through the latter, a pipe discharging into one of the said water-
ways and connected with a water supply, the said pipe being provided with a 5

page_text: steam supply pipe connected with a steam supply, and valves for controlling the-
steam and water flowing through the said pipes, substantially as shown and.
described.
1001
Dated Gay of ap
H. SCHON,
G. MUTH,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents..