Improvements in and relating to the Coating of Moulds for Casting Metal.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in and relating to the Coating of Moulds for Casting
Metal.
We, HENRY STANNING, of 25, Charleston Street, Walworth, London, S.E.,
Leather Cutter, and THOMAS ALDCROFT, of 10, Ralph Street, Falmouth Road,
London, S.E., Foundry Foreman, do hereby declare the nature of this invention
to be as follows:-
This invention relates to a composition for use in coating, moulds employed
in casting metal into various articles of manufacture, and the object of the
invention is to secure a cleaner casting.
Our invention consists of a composition, for application to the mould either
as a powder or in liquid for, constituted of asbestos, clay and carbonate of soda
or common washing soda.
In carrying the invention into effect in the production of a coating composition
asbestos or other similar suitable refractory material is ground to fine powder
and intermixed with ground clay and carbonate of soda, preferably in the
approximate proportion by weight of:-
Four-fifths asbestos
One-tenth clay and
One-tenth carbonate of soda.
The intermixture of these materials can be effected after grinding, or the
intermixture may be effected before grinding. We have found that no less than
four-fifths asbestos, gives satisfactory results, while not less than one-tenth
carbonate of soda, and not less than one-tenth of clay; and we find only the best
quality red clay has given satisfactory results.
The composition is applicable generally for application to moulds in green
sand, dry sand or loam moulding, and the composition is preferably applied as a
powder in green sand moulding, and as a liquid in dry sand or loam moulding.
The composition is used alone.
In the use of a composition according to the invention the metal does not break
or attack or fuse with the sand or loam and fine castings are produced.
Total 1 201
1.
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham.
Agents.

page_text: COMPLETE SPECIFICATION,
Improvements in and relating to the Coating of Moulds for Casting
Metal.
We, HENRY STANNING, formerly of 25, Charleston Street, Walworth, but now of
31, Ravensdon Street, Kennington Road, London, S.E., Leather Cutter, and
THOMAS ALDCROFT, of 10, Ralph Street, Falmouth Road, London. S.E., Foundry
Foreman, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This invention relates to a composition for use in coating moulds employed
in casting metal into various articles of manufacture, and the object of the
invention is to secure a cleaner casting.
Our invention consists of a composition for application to the mould, either
as a powder or in liquid form, constituted of asbestos, clay and carbonate of soda
or common washing soda.
In carrying the invention into effect, in the production of a coating composition,
asbestos or other similar suitable refractory material is ground to fine powder
and intermixed with ground clay and carbonate of soda, preferably in the
approximate proportion by weight of:-
Four-fifths asbestos
One-tenth clay and
One-tenth carbonate of soda.
These proportions may however be varied when preparing a composition for
use in coating moulds for steel castings.
The intermixture of these materials can be effected after grinding or the
intermixture may be effected before grinding. We have found that when coating
moulds for castings of metals other than steel the specific proportions above men-
tioned alone give satisfactory results, and we find only the best quality red clay
has given satisfactory results.
The composition is applicable generally for application to moulds in green,
dry or loam moulding and the composition is preferably applied as a powder
in green moulding and with water as a liquid in dry or loam moulding. The
composition is used alone.
In the use of a composition according to the invention the metal does not break
or attack or fuse with the sand or loam and fine castings are produced.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
A composition for use in coating moulds either as a powder or with water as a
liquid consisting approximately of four-fifths asbestos, one-tenth clay, and one-
tenth carbonate of soda.
Dated is worn may on August
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, and 25, Cross Street, Manchester.
Agents.