Improved Means and Apparatus for Moulding in Sand for Casting.
Year: 1897

page_text: Date of Application, 5th Feb., 1897
Complete Specification Left, 25th Mar., 1897--Accepted, 24th July, 1897
Improved Means and Apparatus for Moulding in Sand for Casting.
I, WILLIAM LITTLEJOHN PHILIP, of, Melksham, Wiltshire, Engineer, do hereby
declare the nature of this invention to be as follows:-
:-
According to my invention I employ the force of gravity for effecting the moulding
of patterns in sand for casting, by causing the sand to fall from such a height into
the mould box that it will attain the requisite momentum for compressing or
ramming itself firmly round the pattern.
For this purpose, I arrange at a suitable height above a table carrying the mould
box and pattern, a receptacle or chamber into which moulding sand is charged by an
elevator or otherwise, and which is at least of such a capacity as to contain a sufficient
charge of sand for tightly ramming the largest moulding box employed in connection
therewith.
The height of the said chamber above the moulding box, which may be made
adjustable, must be such that the body of sand, in falling, shall acquire sufficient
momentum to compress itself to the required hardness and density round the pattern
in the box.
The bottom of the chamber or receptacle is closed by any suitable device, such as
a slide or flap doors, that is, closed for retaining the body of sand until the moulding
operation is to be performed, and which can be rapidly opened for allowing the sand
to fall in a body into the moulding box, the opening being preferably effected by the
attendant at the mould box, by means of suitable gear for moving the slide or
releasing the fastening of the flap door or doors. The shoot which supplies the
chamber is preferably also closed by a slide so as to retain the sand in the shoot when
the bottom of the chamber is open.
Preferably I surround the intervening space, or a portion of it, through which the
sand falls by a tubular casing which may be of about the same sectional area as the
upper opening of the moulding box, so as to prevent the sand from spreading as it
falls, such casing or spout would preferably be made telescopic so as to be adjustable
to suit moulding boxes of varying height or to suit the adjustment in height of the
upper chamber.
Suitable holes are formed in the moulding box or in the pattern plate for the
escape of the air from the box as the body of sand enters it.
The invention is more particularly applicable to "plate moulding" but it is also
adaptable to other systems of moulding.
1007
I, WILLIAM LITTLEJOHN PHILIP, of Melksham, Wiltshire, 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 :-
According to my invention I employ the force of gravity for effecting the moulding

page_text: of patterns in sand for casting by causing the sand to fall from such a height into
the mould box that it will attain the requisite momentum for compressing or
ramming itself firmly round the pattern.
For this purpose, I arrange at a suitable.height above a table or suitable base
carrying the mould box and pattern, a receptacle or chamber into which moulding
sand is charged by an elevator or otherwise and which is at least of such a capacity
as to contain a sufficient charge of sand for tightly ramming the largest moulding
box employed in connection therewith.
The height of the said chamber above the moulding box, which may be made
adjustable, must be such that the body of sand, in falling, shall acquire sufficient
momentum to compress itself to the required hardness and density round the pattern
in the box.
The bottom of the chamber or receptacle is closed by any suitable device, such as
a slide or flap doors, that is closed for retaining the body of sand until the moulding
operation is to be performed, and which can be rapidly opened for allowing the sand
to fall in a body into the moulding box, the opening being preferably effected by the
attendant at the mould box, by means of suitable gear for moving the slide or
releasing the fastening of the flap door or doors.
The shoot which supplies the chamber is preferably also closed by a slide so as to
retain the sand in the shoot when the bottom of the chamber is open.
Preferably I surround the intervening space or a portion of it, through which the
sand falls by a tubular casing which may be of about the same sectional area as the
upper opening of the moulding box, so as to prevent the sand from spreading as it
falls; such casing or spout would preferably be made telescopic so as to be adjustable
to suit moulding boxes of varying height or to suit the adjustment in height of the
upper chamber.
Suitable holes or apertures are formed in the moulding box or in the pattern plate
or between same for the escape of the air from the box as the body of sand enters it.
The invention is more particularly. applicable to "plate moulding" but it is also
adaptable to other systems of moulding.
On the accompanying drawing is shewn by way of example a construction of
apparatus for carrying out my above described invention.
Fig. 1 shews a vertical section and Fig. 2 is a side view of the same.
a is a chamber or receptacle for containing the requisite charge of sand for tightly
ramming a mould box such as is shewn below at g, the sand being charged into the
chamber a through a shoot b, which can be separated from the chamber by a slide c
worked by a rack and pinion as shewn, or by other means.
The lower end of the chamber a is closed by flap doors d which are held closed by
a catch or trigger device e of any suitable construction, on releasing which by a pull k,
the doors d fall open either by their weight only or by the additional pressure of a
spring.
fis a shoot or spout leading down to the mould box g.
The action of the apparatus is as follows:
h
A charge of moulding sand is let down into the chamber a from the shoot b, and
the slide c is then closed; a mould box g and patterns having been placed upon the
plate or turnover board i (on which the patterns may be fixed) below the lower end of
the shoot f, the catch e is withdrawn whereupon the doors d fall open and the charge
of sand falls down through the shoot f into the mould box, the momentum acquired
by the sand in falling being sufficient to ram it tightly round the patterns.
The rammed mould box having been removed and replaced by another one, the
doors d are closed, by means of the external handles or by a geared arrangement for
the larger sizes of machines, and secured by the catch; the slide c is withdrawn for
allowing another charge of sand to enter the chamber a, and the above described
operation is repeated.
Having now particularly described and ascertained the nature of this invention and
in what manner the same is to be performed, I declare that what I claim is :-
1
fatin the mamm
cand in mould

page_text: of sand to fall from a receptacle placed at such a height above the mould box that
the momentum acquired by the sand will be sufficient to cause it to be rammed in
the box tightly round the pattern, substantially as described.
2. The use for ramming mould boxes in the manner referred to in the first claim,
of apparatus consisting of a chamber or receptacle held in a raised position some
height above the mould box and adapted to receive a charge of sand sufficient for
tightly ramming the said box, and closed at its underside by any suitable device that
can be rapidly opened for allowing the sand to fall in a body, substantially as
described.
3. In apparatus for ramming sand in mould boxes, the combination of a chamber a
closed at bottom by falling doors d secured by a catch or trigger and at top by a
slide c, a shoot 6 for charging sand into the box a, and a shoot f for confining the
charge of sand as it falls from the chamber a into a mould box below, substantially
as described with reference to the drawing.
Dated this 25th day of March 1897
ABEL & IMRAY,
Agents for the Applicant.