IMPROVEMENTS IN MACHINERY FOR PRODUCING MOULDS AND CORES TO BE USED IN CASTING METALS
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by Joseph Whitley and Samuel
Joseph Peet at the Office of the Commissioners of Patents, with
their Petition, on the 14th April 1869.
We, JOSEPH WHITLEY, and SAMUEL JOSEPH PEET, both of Leeds, in the
County of York, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MACHINERY FOR PRODUCING MOULDS AND CORES TO BE USED IN
CASTING METALS," to be as follows:-
This Invention has for its object improvements in machinery for
producing moulds and cores to be used in casting metals.
For the production of moulds for casting metals we employ a table
in which is an opening of rectangular or other convenient form, and
fitted to this opening is a plate which when in its place just fills the
opening. This plate is arranged to be drawn down out of the opening
and replaced by a screw or any convenient mechanical contrivance. The
patterns having been prepared pedestals are made to receive them, each
pedestal on its upper surface corresponds in form with the base of its
pattern, its sides are parallel or slightly tapered, and its bottom is flat to rest
upon the moveable plate of the moulding machine to which it is fixed when
in use. The pedestals having been prepared and fixed in their proper

page_text: positions a plate of type or other suitable metal is cast around them, and
the thickness of this plate when finished is equal to the height of the
pedestals. This cast plate is mounted on the table over the opening,
and it fits into a recess which keeps it in its place; then the pedestals
having been fixed on the moving plate of the machine, when this plate
is brought up so as to close the opening in the table, the pedestals exactly
fit into and fill the openings in the cast plate, whilst the patterns
mounted upon the pedestal project through it; the flask in which the
mould is to be made is placed on the cast plate and rammed full of
sand as usual, then the moving plate is lowered, and it carries with it
the patterns leaving the mould in the flask.
For making cores for moulds, when the cores require to be formed
in a box consisting of two parts, we mount the two parts of the box
on two slides capable of being brought together by a right and left
handed screw; the parts of the core box are hinged to the slides to
allow them to be placed in a horizontal position for filling; filling
hoppers or funnels of suitable capacity are placed over the parts of the
core box, and they are filled with the sand or material used to make the
cores; a frame of mechanical rammers is then brought into action
and it rams them simultaneously and uniformly; the filling hoppers
or funnels are next slidden off and with them any slight excess there
may be of the sand or material; the core boxes are now turned over
face to face, and brought truly together by the right and left handed
screw, the parts of the cores are made to adhere together, and then
the core boxes being separated the cores are left on a plate placed to
receive them, and on which they are conveyed to the stove.
To provide for rapping the core boxes simultaneously while they
are receding, thus causing them to leave the cores, we use for our
stamps two metal heads with steel stems, and we mount on the posts
or rods on which the ram follower moves up and down a horizontal
shaft, upon which are put a number of arms to give any number of
raps needed. This shaft has a set of arms for each pair of boxes, the
arms being of sufficient length to move the ram on each side, thus
causing a rap on each side of each part of the box whenever and as
often as the arms shall pass the ram handle. This horizontal shaft with
the arm is turned by a crank or sweep.
Or for moulding cores we employ a table, over which is mounted
a plate which it is convenient to cast in type metal, and which has

page_text: holes through it corresponding in form to the cores to be produced;
this plate is so mounted that by a cam or other mechanical means it can
be lifted and lowered, remaining parallel to the table; over it is placed
another similar plate so that the holes in the two plates correspond,
those in the upper plate serve as filling funnels; a thin plate of metal is
laid on the table under the cast core plate, which is then filled and
rammed as in the core-making machine first described; the upper or
funnel plate is then slidden off with the surplus sand or material, and
the core plate is then lifted leaving the cores on the thin plate beneath,
on which they are taken to the stove.
In constructing core boxes we form a shell of brass or iron, or steel,
of a like contour to the core required, the inner surface of this shell
we pickle and tin, the shell is made larger than the required core, and
we place it over a master mould or pattern of the exact size of the
required core, and having secured the joints we run in white metal
or other substance, and by this means we get a strong and yet a light
core box, perfect in all its parts, of the exact form of the master mould
or pattern from which it is cast.