Improvements in or relating to Sand Moulding Machines.
Year: 1893

page_text: Date of Application, 1st Apr., 1893-4ccepted, 2nd June, 1893
COMPLETE SPECIFICATION.
Improvements in or relating to Sand Moulding Machines.
I, HENRY VAUGHAN of Millfield, Willenhall in the County of Stafford, Lock
Manufacturer and Iron Founder, 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 which is specially applicable in conjunction with sand-moulding
machines of the kind described in the Specification of Letters Patent No. 11368
of 1888 granted to Frederick George Leeder, has for its object the provision of
means for preventing end or side slipping of one part of the mould upon the other
either whilst in the machine or whilst the mould is being laid on the foundry floor,
distortion of the casting produced being thereby obviated.
To that end I fit within the moulding boxes or flasks of the moulding machine
loose flasks, frames or binders within or around which the sand is pressed in forming
the mould, pins being formed or fitted on one frame or binder to fit orifices on the
other so that when the completed mould is removed from the machine the flasks
hold the parts of the mould together and prevent side or end slipping.
In the accompanying drawings
Figure 1 is a sectional elevation of a moulding machine of the type referred to
shewing my improvements applied thereto, Figure 2 a sectional plan of the same.
Figure 3 a plan of one of the improved frames and
Figure 4 a vertical section of part of the machine showing the sand mould in
the boxes after removal of the patteru plate and before the mould is ejected from
the machine.
As represented in these drawings I place a loose frame or binder A in the lower
mould box B of the machine supported on vertical fins or ledges 6 in the box so
that its upper edge is flush with the top of the mould box, and bears with the
latter against the lower face of the pattern plate or parting plate C in the moulding
operation, orifices a being formed in this frame to fit corresponding pins e on the
lower face of the pattern plate C.
The loose frame or binder A¹ in the upper box B' is similarly formed or fitted
with pins a' adapted to fit into orifices c¹ in the upper face of the pattern plate C
on which the frame may be laid either before swinging the plate C between the
mould boxes B, B¹ or after lowering the top box B thereon and before filling in
the sand.
The pins may be formed on the lower frame and the orifices in the upper frame
the-pins and orifices in the pattern plate being made to correspond but the pins on
the one frame are in every case fitted vertically over or under the orifices in the
other frame, so that after pressing the sand to form the mould, removing the
pattern plate and lowering the upper half mould on to the lower part, the two
frames engaging the parts of the mould will be locked together as is indicated at
Figure 4. The pins and orifices may be replaced by ledges or projections on one
flask fitting corresponding recesses in the other flask and in the pattern plate.
To prevent the frame or binder A¹ in the upper box dropping out when the
bottom box is lowered to remove the pattern plate, spring pins or catches D are or
may be fitted on the upper mould box B¹ the said catches passing through the box
and engaging the frame to retain it in its place. These catches are kept normally
in engagement by levers D' acted on by springs, but they are automatically
retracted to free the frame or binder A when the top and bottom boxes B, B¹ are
brought together before ejecting the mould by means of cam pieces or projections D'
on the bottom box B which tilt the levers D₁ so as to withdraw the catch pins. In
lieu of these catch pins ledges or fins may be formed on the upper box to correspond
with the ledges 6 in the bottom box to support the binder until the upper half
Pain Q.17

page_text: mould is lowered on to the bottom half the platen of the machine being grooved to
clear said ledges in ejecting the mould.
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 :
In conjunction with a sand moulding machine in which the moulds are formed on
the upper and lower sides of a pattern plate the employment of loose frames or
binders supported in the mould boxes and adapted to lock together the parts of the
mould on their removal from the machine, substantially as described.
Dated this 31st day of March 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.