Improvements in the Means and Apparatus for Making the Moulds in which Metals are to be Cast.
Year: 1890

page_text: Date of Application, 6th Dec., 1890
Complete Specification Left, 18th Aug., 1891-Accepted, 3rd Oct., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Means and Apparatus for Making the Moulds
in which Metals are to be Cast.
I JOSEPH HEYDON of Southwell Road Mansfield in the County of Nottingham
Engineer do hereby declare the nature of this invention to be as follows:-
:-
This invention has reference to certain improvements in moulding machines for
which Letters Patent were granted to me bearing date the 5th day of August
1864 No. 1951.
In place of the arrangement of mechanism described in the said Patent for
imparting the required pressure to force upward the mould to a fixed disc as there
described, I prefer or employ the following arrangement―
The piston rod is carried through the bottom cover of the steam cylinder. A
strong cross bar is attached to the piston-rod and suitable side rods rise vertically
giving motion to an upper cross-bar, from the middle of which and immediately
above the centre of the steam cylinder depends an iron surface plate or presser, the
mould being placed on the table and in position for pressing, steam is admitted in
the cylinder, and the presser surface descends ramming the sand in the mould to
the pattern plate.
For the ingress and escape of steam to the cylinder I provide an ordinary three-
port slide valve, which enables, the steam to act on both sides the piston.
The pattern plate supported by its trunnions is free to revolve upon a carriage
which slides to and from upon two parallel bars fixed to the table of the machine.
By this means the pattern plate my be drawn out of the line of the presser to allow
the upper half of the mould box which is filled with sand to be pressed, in a
similar manner to the first half mould when the moulding will be complete.
Dated this 8th day of December 1890.
JOSEPH HEYDON.
COMPLETE SPECIFICATION.
Improvements in the Means and Apparatus for Making the Moulds
in which Metals are to be Cast.
I JOSEPH HEYDON of Southwell Road Mansfield in the County of Nottingham
Engineer 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 has reference to certain improvements in moulding machines for
which Letters Patent were granted to me bearing date the 5th day of August
1864 No. 1951.
In place of the arrangement of mechanism described in the said Patent, for
imparting the required pressure to force upward the mould to a fixed disc as there
described I prefer or employ the following arrangement.
On the accompanying sheet of drawings
Figure 1 represents a front elevation of a machine for making moulds according
to my improvements, while Figure 2 is a side elevation, partly in section, which
shews the action of the slide valve.
A is the piston rod passing through the stuffing-box cover of the steam-cylinder W.
B is the cross bar to which the piston rod is attached by a strong screw and nut as
shewn. CC are the side rods, rising vertically and passing through the slides D. D.
17

page_text: The upper cross-bar E is attached to the side rods by suitable screws and nuts as
shewn, the surface plate or presser F is attached to the cross-bar E. and is
immediately above, and in vertical line with the centre of the cylinder W. The
pattern plate or odd-side G may be made of metal or plaster, but to suit the variety
of small castings for which this machine is designed, the odd-side will be found most
convenient made in plaster. The balance weights H H. serve to balance the
pattern plate, which works on a trunnion or hinge, this mechanism is arranged to
turn over in a balanced form by the weights acting as a counterpoise, the whole
arrangement is hinged to the carriage I which travels backward and forward upon
the slides or rails jj. the friction rollers k. k. serve to reduce the friction and allow
the carriage I with the mechanism thereon to move easily, more than one carriage
with similar turn-over apparatus may be worked on the slides jj which by alternate
working will increase the number of moulds.
In moulding with this machine the patterns are placed on the pattern plate or
odd-side G, the surface of which is the point at which the mould would part, a flask
or moulding box L is next adjusted by the usual guide pins and made fast to the
pattern plate or odd-side by the catches Q Q. which take hold of the lugs which
are fixed to the moulding box as shewn. Sand is now filled in, the carriage I with
the mould thereon is pushed forward into the vertical line and under the presser F.
By moving the lever N. steam is admitted by the valve V. to the upper side of the
piston P. the presser F descends and the sand is compressed to the patterns, after so
ramming the sand in the mould, the steam is reversed by moving the lever N and
valve V. and enters the cylinder on the underside of the piston P, which lifts the
presser plate out of the way, leaving the carriage with the mould free to be drawn
out of the way. The other carriage marked P is next pushed into position by
being in vertical line with the presser F and receives the mould which is now
turned over from the hinged plate, occupying the position indicated by the dotted
lines, the catches Q Q. are released which disconnects the turn-over plate leaving
the mould on the carriage P.
The first half of the mould being now completed, the upper flask or mould box is
placed on the part already pressed. Sand is again filled in, the same operation is
repeated of pressing in the sand, and thus completes the mould ready for removal
to the foundry floor where the moulds are separated and the patterns drawn in the
usual way, dried parting sand is used at the joint of the mould to cause it to
seperate and the usual gate pegs are pressed in the sand.
After the first half mould is pressed, the carrier-board is placed on the mould
as shewn, and may be attached by the catches Q Q, or the carrier-board may be
placed on the carriage P' to receive the mould when turned over, or the carrier
board may be made to fit inside the mould-box as shewn by the dotted line in
Fig. 1 and form a piston under the presser at the time of pressing in the sand, in
any case the mould will be deposited on the carrier-board ready for removal to the
foundry floor.
This machine is adapted for moulding small castings where great numbers are
required such as toy wheels, hat pegs, coat hooks and similar small castings which
are usually moulded by hand from a plaster odd-side, and which is commonly called
odd-side work. An important feature in this machine is, that it may be applied to
existing plants for hand moulding.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
:―
1. The before described improved arrangement of mechanism for imparting the
motion to the presser plate.
2. The before described improved mechanism for sliding the moulds backward
and forward, in and out of the line of the
presser.
3. The before described arrangement of passing the steam, so that it may act on
both sides of the piston.

page_text: 4. The improved retaining or carrier board as described.
5. The improved arrangement for turning over the moulds in the hinged sliding
carriage as described.
JOSEPH HEYDON.