AN IMPROVED MOULDING MACHINE FOR MOULDING RAILWAY WHEELS, Spur AND BEVIL WHEELS, TOOTH WHEELS, AND OTHER WHEELS AND CASTINGS GENERALLY."
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by John Mosedale and Edwing Urry at
the Office of the Commissioners of Patents on the 6th September 1881.
JOHN MOSEDALE, of Warwick Cottage, West Drayton, in the County of
Middlesex, Foundry-Engineer, and EDWING URRY, of 95, Hawkesley Terrace,
Stoko Newington, in said County, Mechanical Draughtsman. "AN IMPROVED
MOULDING MACHINE FOR MOULDING RAILWAY WHEELS, Spur AND BEVIL
WHEELS, TOOTH WHEELS, AND OTHER WHEELS AND CASTINGS GENERALLY."
For moulding railway and other wheels we prepare a suitable model of the
exact size required, including the tyre, and we mould the same in a suitable
moulding-box expressly made for the purpose. After taking the model from the
sand in the moulding-box, we have ready the tyre heated sufficiently for all
necessary expansion, and expressly made of a dovetailed section. We do not
confine ourselves to any particular shape of the body of the wheel, which may be
regulated by requirements, although we prefer to form internal arms in a blank
wheel, thereby securing greater tenacity. When all the cores are adjusted and the
mould is ready for casting, we put in the heated tyre and cast immediately. The
result of this operation is, the dovetailed section is embedded in the molten iron,
and the tyre having been heated previously to being put in, the entire mass
contracts and coheres, thus producing a sound, strong, and accurate wheel. If
desirable we may apply to the interior of the tyre galvanized zinc, tin, lead,
graphite, or other suitable metal, for the purpose of rendering the iron more
adhesive to the tyre. For moulding castings generally, we provide a square or
round cylinder or box, in the interior of which we fix supports to carry one pair
of mitre wheels, one of which wheels is threaded for a screw, the top of which
screw is designed for changing patterns. To the other of said wheels we fix a fly-
wheel. At the bottom of the aforesaid screw we fix a plate with one or more
set screws for regulating the various depths of tooth and other wheels to be
moulded. We also fix a plate fast to the cylinder or box, and separate from said
screw to carry the segments between the arms of wheels and other castings. We
attach a convenient number of guides to the screw and plate carrying the patterns,
which patterns work in a matrix made of cement, tin, lead, or other material
suited to the form of the pattern. The top plate is removeable at pleasure. At a

page_text: suitable height from the machine-table we place a turning-over-plate, which is
capable of being firmly stayed. On this turning-over-plate we place the articles to be
moulded, and we then place on them the moulding-box, which we fill up with sand.
We also put a collapsing moulding-box of suitable depth over the first mentioned
moulding-box. We fill up said collapsing moulding-box with sand, so that when
pressure is brought to bear, the first mentioned moulding-box, namely, that which
contains the patterns, will be suitably filled with sand, thereby obviating the
necessity of refilling with sand said box. We bring the under part of the moulding.
machine-table into contact with the moulding-box and patterns therein by screw
action. By turning the herein before mentioned fly-wheel, a downward motion is
produced, thereby removing the mould more gently and accurately from the models
than has been hitherto effected. For the pressure upon the aforesaid collapsing box
we use a quick powerful screw in connection with a declining table with eccentric
or cam motion, and which can be used with hand or steam power.
As great
difficulty has been experienced in moulding patterns of peculiar shapes, we cover such
patterns with sand to the depth of about one fourth of an inch, and we make an
internal matrix of any suitable metal from said patterns. We then fill up the
moulding box with sand to the extent of one half, press in said matrix slightly,
and afterwards fill up the moulding-box to the collapsing box with sand, put on the
necessary pressure, and the mould is finished. In moulding wheels and other
castings we facilitate the venting or taking off the air from the mould by using
wire guard of any mesh, according to the size and shape of pattern, and
perforated to receive the vent-pegs, which we form of steel, mounted in a suitable
frame with suitable bearings.
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