IMPROVEMENTS IN MOULDS FOR CASTING METALLIC ARTICLES, AND IN THE TREAT- MENT AND MEANS OF FINISHING CAST METALLIC ARTICLES
Year: 1868

page_text: PROVISIONAL SPECIFICATION left by Thomas Deykin Clare at the
Office of the Commissioners of Patents, with his Petition, on the
9th June 1868.
I, THOMAS DEYKIN CLARE, of Birmingham, in the County of Warwick,
Merchant, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MOULDS FOR CASTING METALLIC ARTICLES, AND IN THE TREAT-
MENT AND MEANS OF FINISHING CAST METALLIC ARTICLES," to be as follows:-
My improvements in moulds for casting metallic articles consist in
making the said moulds of thin or sheet, iron, steel, or other suitable
ductile metal in the following manner :-I form dies of steel or other
hard metal in any known or convenient manner and so arranged in
number, form, size, and configuration, that thin or sheet metal stamped
or pressed in the same shall when all the parts or shells are put together
represent in the interior the reverse of the article proposed to be cast
therein. Into these dies I press or stamp thin or sheet iron, steel, or
other suitable ductile metal in a heated, or partially heated, or in a cold
state. I sometimes use two pairs of dies only, that is, an upper and a
lower die to form the half of the shell or mould, but sometimes I use
more dies, so as to form more than two shells or parts of the entire

page_text: mould, but so arranged that when all the parts are put together they
form an entire mould representing as aforesaid in the interior the
reverse of the article proposed to be cast therein. I take the different
parts or shells thus produced and forming an entire mould, and I fasten
them together in any convenient manner, but I prefer to place the said
moulds in a casting box or other convenient receptacle and press or
ram sand or other suitable material around them. I provide the
necessary gates for the introduction of the melted metal and air ways for
the escape of gases generated, and I usually smoke or othwise coat the
interior of the moulds with carbon or other suitable material, and I pour
into the moulds the melted metal to form the casting.
My improvements in the treatment and means of finishing cast
metallic articles applies more particularly to articles made of cast iron,
cast malleable iron, cast steel, and homogeneous iron.
In carrying this part of my Invention into effect upon articles made
of cast iron or malleable cast iron I take the cast articles from the
moulds, either cast in the ordinary way or in the thin metal moulds, as
herein-before described, and having removed any superfluous metal I
thoroughly anneal or decarbonize them and remove the oxide wholly or
partially therefrom; I heat them in a fire muffle, or otherwise, suf-
ficiently to render them soft and compressible, and I then hammer, press,
or stamp them in a pair or more of dies or a series of dies, graduated or
otherwise, the said dies being so arranged that the finishing dies shall
represent the exact external size, shape, and configuration of the finished
article required to be produced. The articles will require in some cases
to be drilled, tapped, screwed, machined, filed, or ground in parts, thre
These
more completely to adapt them for the intended purposes.
improvements enable me to dispense partially or sometimes entirely with
skilled manual labour in machinery or filing, as ordinarily employed,
and thus reduce the cost of production of the articles to which these
improvements may be applied.