Improved Means for and Method of Moulding Plough Shares, Plough Heads, and the like.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improved Means for and Method of Moulding Plough Shares, Plough
Heads, and the like.
I, ALFRED HALL, Ringstead, King's Lynn, in the County of Norfolk, Engineer,
do hereby declare the nature of this invention to be as follows:-
The object of this invention is to devise a method of and means for moulding.
plough shares; plough heads and the like castings without the use of a loose pat-
tern, and to enable such castings to be produced both efficiently and economically.
Hitherto great difficulty has arisen in moulding castings such as those referred
to from the fact that there are certain lugs or projections upon them which are
tapered in such a way that the pattern cannot be readily drawn from the moulding
sand. I have overcome this difficulty by providing two blocks of a suitable shape
one of which has fixed or formed upon it a pattern representing the top part of
the share whilst the bottom has fixed or formed upon it a pattern to correspond
with the bottom portion of the share. These blocks are used in conjunction with
moulding boxes to hold the moulding sand, which boxes are made to fit cach
other and the blocks referred to, suitable means being provided for keeping the
parts in correct position whilst the sand mould is being prepared. The blocks and
boxes are supported upon a suitable frame consisting of four legs or similar
means and the moulding is carried out in much the usual way so far as mani-
pulating the sand is concerned. The principal novelty in the invention; however,
is to be found in the method of drawing the lugs referred to from the sand.
These lugs, therefore, are made capable of being moved in the requisite direction
through the bottom of blocks and the sand. Their movement I prefer to effect
by means of racks and pinions the lugs passing through slots and being kept
in position by guides. The racks gear into the pinions which in turn gear with
each other, and their rotation, to enable the lugs to be drawn, is effected by a
winch handle: It will be obvious however, that other mechanism may be devised
for drawing the lugs.
The invention is applicable to the moulding of plough heads and to the mould-
ing of other castings in which the same difficulty is found.
73 L 1 11. 141 1 of 1808
WILLIAM H. TAYLOR,
Swan Chambers, 69, Market Street, Manchester,
Agent for the Applicant.

page_text: Improved Means for and Method of Moulding Plough Shares, Plough
Heads and the like.
I, ALFRED HALL, Ringstead, King's Lynn, in the County of Norfolk, 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:
The object of this invention is to devise a method of and means for moulding
plough shares, plough heads and the like castings without the use of a loose
pattern, and to enable such castings to be produced both efficiently and econo-
mically.
My invention will be thoroughly understood from the accompanying drawings
in which
Fig. 1 is an end elevation of the machine partly in section and
Fig. 2 a plan of same.
Hitherto great difficulty has arisen in moulding castings such as those referred
to from the fact that there are certain lugs or projections upon them which are
tapered in such a way that the pattern cannot be readily drawn from the mould-
ing sand.
In carrying out my invention I overcome this difficulty by providing
two blocks such as A of a suitable shape, one of which has fixed to, or formed
upon it a pattern representing the top part of the plough share, or other pattern
whilst the bottom block has fixed to or formed upon it a pattern to correspond
with the bottom portion of the share or other pattern. These blocks are used in
conjunction with moulding boxes to hold the moulding sand which boxes are
made to fit each other and the blocks referred to, suitable means being provided
for securing the parts in correct position whilst the sand mould is being prepared.
The blocks and boxes are supported upon a suitable frame consisting of four legs
or similar supports and a table. As showing the manner in which I preferably
carry out this I support a table B, whose upper surface is planed or otherwise pre-
pared so as to be level, upon a frame consisting of legs C and cross rails D. E is
one half of a moulding box which is placed upon the table B and kept in correct
position thereon by means of the projecting lugs or ears e which engage with the
edges of the table and also by a pin f fixed to the table and which passes
through a hole in the ear g of the moulding, box.
as at
The principal novelty of the invention consists in the means for enabling the
tapered lugs referred to being moulded. To do this the pattern block A, is slotted
a, corresponding slots being formed in the table B. The lugs instead of
being attached to the pattern blocks are capable of being moved in the required
direction, through the slots referred to and into the sand. They are indicated by
the letter F and may be formed in one with the plate f as shown, or be separately
attached thereto. In order to place the lugs in position and withdraw them as
required I employ pinions G and racks H, the latter being cast on, or attached
to, the plates f. The racks gear with the pinions, which in turn gear with each
other and their rotation is effected by means of a winch handle h attached to one
of the shafts which are supported in brackets fixed to the cross rails of the
machine. The cross rails are also provided with projections J forming guides for
the plates f, similar guides being formed on the underside of the table B. It
will be obvious that other mechanism may be devised for drawing the lugs with-
out departing from the spirit of the invention.
In moulding a plough share or other casting the pattern block A for one side

page_text: of the share is placed in position on the table B. the lugs are moved upward into
the position shown in Fig. and the moulding box is laid on the table B. The
sand is next rammed up round the pattern, the lugs withdrawn, the box lifted
away and the block A replaced by one for the other side of the share the second
half of the moulding box also being placed in position. The cycle of operations
is then repeated and the second half of the box is finally placed on the first half
in readiness for pouring the metal. I use a separate stand for each block so as
to have a moulder at work on each to give quicker work.
By the means described plough shares and other castings can be moulded much
more rapidly than by the methods previously in vogue thus saving both time and
labour besides obtaining a cleaner and better casting. I would have it understood
that the invention is applicable to the moulding of plough heads or to other cast-
ings where the same difficulty as referred to is found.
i
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. The method of moulding plough shares and the like consisting in the use of
pattern blocks formed with slots in conjunction with lug patterns movable in and
out of the moulding sand.
2. A machine for moulding plough shares and the like provided with movable
lug patterns, substantially as described.
3. A machine for moulding plough shares and the like constructed and arranged
substantially as described and shown with reference to the accompanying drawings.
Dated this 13th day of January 1899.
WILLIAM H. TAYLOR,
Swan Chambers, 69, Market Street, Manchester,
Agent for the Applicant.
WILLIAM H. TAYLOR,
Swan Chambers, 69, Market Street, Manchester,
Agent for the Applicant.