IMPROVEMENTS IN MACHINERY OR APPARATUS FOR MAKING SAND MOULDS FOR METAL CASTINGS
Year: 1878

page_text: LETTERS PATENT to William Darling and Robert Varley Sellers, of the Firm
of Darling and Sellers, Airedale Works, Keighley, in the County of York, for
the Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR MAKING
SAND MOULDS FOR METAL CASTINGS."
Sealed the 28th February 1879, and dated the 31st December 1878.
COMPLETE SPECIFICATION filed by the said William Darling and Robert
Varley Sellers at the Office of the Commissioners of Patents on the 31st
December 1878.
:
WILLIAM DARLING and ROBERT VARLEY SELLERS, of the Firm of Darling and
Sellers, Airedale Works, Keighley, in the County of York. "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR MAKING SAND MOULDS FOR METAL CASTINGS."
This Invention consists in improved machinery or apparatus for compressing the
sand in the flask or box instead of hand ramming, and in combining the said com-
pressing apparatus with the present well-known moulding machine, whereby the
Bask or box is withdrawn from the pattern or model by two mechanical
movements.
To make our Invention better understood, we will proceed to describe the same
by reference to the accompanying Drawing, in which,―
.
Figure 1 represents a front elevation of an ordinary moulding machine, to which
is fitted the sand compressing apparatus; Figure 2, side elevation; and Figure 3,
plan of the same.
Figure 4 represents an adjusting sand compressing plate; and Figure 5, plan of
the same.
Figure 6 represents a front elevation of an adjusting eccentric lever; and Figure 7,
side elevation of the same.
A is the box of an ordinary moulding machine, which is fitted in the inside with
the usual lifting and lowering gear of the table B; this gear is actuated by &
lever C and weight D. The sides of the box form part of the side frames E of the
ח

page_text: combined apparatus. Over the lifting table, and at a suitable distance therefrom, is
fitted a turn-over plate F, which is fixed to the side frames & by bolts and nuts H;
these side frames are hung on trunnions I, on which the turn-over plate turns,
allowing the plate or table F to be turned over to withdraw the flask from the
pattern, and bring the flask secured under the table on the top to be operated on.
The turn-over plate is secured in position by gear J, of similar construction to the
gear now employed in the ordinary turn-over plate moulding machines.
The side plates of frames E are made with face plates K, on which the slides Lof
a compressing plate M slide up and down. The slides L are cut with grooves N to
allow for the different depths of the flasks to be employed; the compressing plate M
can be removed to any of the grooves, and on such removal the end plates O are
removed. On the stop plates P, between these plates and the ends and face of the
slides L, are fitted with india-rubber buffers Q, to deaden the blow in pushing the
compressing plate forward and backwards. The slides L are actuated by eccentrics R
and eccentric levers S, the ends T of these levers being secured by studs and nuts
to the bosses U of the slides. The eccentrics are worked by a revolving shaft V,
which turns in bosses W cast on the side frames E, and the shaft is actuated by a
spur wheel X, which receives motion from a pinion Y working on a socket, and runs
loose on a stud bolted to the side frames E; on the socket also is the fly wheel Z,
fast pulley A', and loose pulley B¹.
The flask C and mould flask D' are secured to the turn-over table or plate F by
ordinary box pins E'; the flask or box having the pattern or model is then filled
with moulding sand, and a wooden cover F" is placed over the sand (but the cover
can be made of metal). This cover is prevented from moving out of position or
falling off when the table is turned by means of the fingers G¹ which are fitted on
screwed rods, and secured by nuts to the required position; these fingers press on
small iron plates H₁ screwed to the top of the wooden cover. The compressing
plate M is then pulled forward and over the wooden cover, and comes in contact
with the wooden cross pieces I', secured on the top of the wooden cover.
The slides descending with the bottom stroke of the eccentrics press the wooden
cover in the mould flask, compressing the sand at one stroke, as shewn in Figures 1
and 2 of the accompanying Drawing, but more strokes may be given, according to
the nature of the work being done; the compressing plate ascending with the return
top stroke of the eccentrics, removes the compressing plate M from contact with the
wooden cover; the plate is then pushed back, as shewn in Figure 3. The turn-over
table or plate is then released by pulling the handle J1, and the table flask and
mould turned over. The bottom table B is then lifted up by means of the lever C
and gear, and then gradually lowered and the mould removed. At the same time
the bottom flasks are turned upwards ready to be operated on.
The pattern or patterns to be moulded from may be arranged on a plate or plaster
part, and can be guided in position by ordinary box pins. The apparatus is driven
by a belt and by power, but a fly wheel, to which is fitted a handle, can be employed
to actuate the apparatus by hand; in this case the pullies are not required.
We may also employ cams instead of eccentrics to give the up-and-down motions
to the slides L.
We may also employ an adjusting compressing plate, Figures 4 and 5. This com-
pressing plate K¹ can be lowered or lifted from the frame, which slides in the grooves
of the slides L, herein-before described. The plate is fitted with an adjusting screw L',
having a collar M¹. The screw is secured to the plate K¹ by a plate N¹, which is
secured to the compressing plate by screws, but we may employ two or more screws
if the pressure to be given is great, and according to the nature of the work to be
done. The sliding frame O' is cast with ribs P¹ and boss Q1; this boss is made with
a recess, in which is fitted an india-rubber ring R¹ and nut S', in which screws the
screw L. The top of this screw is fitted with a hand wheel T¹, and the screw is
fixed in position by a lock nut U₁. By turning the hand wheel, the screw and
compressing plate can be lowered or lifted according to the depth of the flasks, and
also according to the required pressure to be given to the sand mould. The ends V₁

page_text: work in the grooves N of the slides L and the compressing plate frame, and are
moved from one groove to another to suit the depth of flask used.
We may also employ the adjusting eccentric levers shewn in Figures 6 and 7.
These levers are made with slides W', having slot holes X¹. In the slides are fitted
adjusting eccentric bottom levers Y¹, which are secured to the required position by
bolts and nuts Z¹. These adjusting levers allow the lowering or lifting up of the
slides L, and consequently of the compressing plate M, to give more or less pressure
to the sand mould, or to regulate any slight alteration in the depth of the flasks.
Having thus described our improvements, and the best means we are acquainted
with for carrying the same into effect, we would have it understood that we do not
confine ourselves to the precise details shewn and described, as they may be varied
without departing from the peculiar character of the Invention, nor do we claim the
lifting and lowering table B, and gear or the turn-over table F and gear, as they
are well-known moulding apparatus, but what we do claim is,-
Firstly. The general arrangement, construction, and employment of apparatus for
making sand moulds for metal castings, also the parts specially arranged for working
with the herein-before named moulding machine, having a turn-over plate or table,
substantially as herein-before described, and represented in the accompanying
Drawing.
Secondly. The construction and employment of the slides L and compressing
plates M, actuated by eccentrics or cams, substantially as described, and represented
in the annexed Drawing.
Thirdly. The adjusting compressing plates and eccentric levers, substantially as
herein described, and represented in the accompanying Drawing.
In witness whereof, we, the said William Darling and Robert Varley Sellers,
have hereunto set our hands and seals, this Thirtieth day of December, in
the year of our Lord One thousand eight hundred and seventy-eight.
WILLIAM DARLING.
(L.S.)
0 Witness,
WALTER JAS. TURNER, C.E.,
Patent Agent,
Bradford.
ROBERT VARLEY SELLERS. (L.S.)