Improved Means and Apparatus to be Employed in the Moulding of Tubular and Dished Articles from Molten Metal.
Year: 1890

page_text: Date of Application, 10th May, 1890-Accepted, 14th June, 1890
Improved Means and Apparatus to be Employed in the Moulding of
Tubular and Dished Articles from Molten Metal.
I, WILLIAM AMBLER, of Bradford, in the County of York, Engineer, do hereby
declare the nature of the said 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 relates to an improved arrangement of apparatus to be employed in
the moulding of tubular and dished articles from molien metal, the improved apparatus
being specially adapted to produce such articles as shells, hollow ingots, still bottoms
and heads and the like having solid or closed bottom ends.
On the accompanying drawings Fig. 1, represents an elevation of the improved
apparatus, and Fig. 2, represents a plan view thereof.
The apparatus is constructed with a vertical mould, 5, which is made of the
required internal formation and dimensions and is bolted to a table, 6, which is
supported by a bridge, 7, over the well, 8, of an hydraulic ram, 9. The mould is
also guided by a series of steadying runners, 10, carried by a crosshead, 11, which
is supported by standards, 12, rising from the foundation, 56.
The table, 6, rests on and is driven by a disc, 13, which is keyed on a shaft, 14,
supported by bearings, 15, rising from the foundation. On the other end of the shaft
there is keyed a disc, 16, which is driven by frictional contact with a disc, 17, keyed
on a first motion shaft, 18, the disc, 16, being pressed against the disc, 17, by a
spring, 19, having its bearing against the adjacent standard, 15. The disc, 17, is
mounted on a shaft, 18, with facility of to-and-fro movement thereon to the extent
of the radius of the disc, 16, such movement being effected by means of a clutch, 20,
actuated by a hand lever, 21, centred to the foundation at, 22. The shaft, 18, is
supported by opposite side standards, 23, and is fitted with fast and loose pulleys, 24, 25,
and may be driven at any suitable speed.
The table, 6, is made fast by a tubular hub, 26, to a toothed wheel, 27, which
actuates one, 28, of a pair of superposed connected change wheels, 28, 29, which are
keyed to a stud, 57, carried by the bridge, 7, the other of which wheels actuates a
change wheel, 30, keyed on a lift-rod, 32, which rests on the ram, 9, and rises through
the tubular hub, 26, into the interior of the mould.
Within the mould the rod, 32, is fitted with a removable false bottom, 31, which is
keyed thereon and is made of a cheese-shaped or analogous formation in one piece or
in concentric rings.
The apparatus is also constructed with a rolling plunger, 33, of a shape conform-
able to the shape of the article to be moulded. The plunger is supported by a
collar, 34, on a spindle, 35, around which it can freely rotate. The spindle is sup-
ported by a slide frame, 36, which is supported by lateral slide guides, 37, and can
be moved to-and-fro by a hand-wheel, 38, gearing, 39, and screwed rods, 40, worked
in lugs, 41, projecting from the slide frame, 36.
The guides, 37, project from a tubular carrier, 43, which is supported by a shaft, 44,
and can be turned thereabout by a handwheel, 45, and worm, 46, carried by
bearings, 47, keyed to the shaft, the worm engaging with a worm-wheel, 48, made
fast to the carrier.
The shaft is guided by top and bottom frames, 49, bolted to the standards, 12, and
it (together with the carrier, 43, and its attachments) can be raised and lowered in
such frames by a handwheel, 50, and worm, 51, carried by bearings, 52, supported by
the cross-head, 11, the worm, 51, engaging with a worm-wheel, 53, which works
between opposite fixed parts, 54, of the bearings, 52, and engages with a screwed
portion of the shaft, and by its rotation causes the shaft to be raised or lowered
without being rotated. By such means the plunger can be raised from and lowered

page_text: into the mould, and when lowered can be set at any desired distance from one side of
the mould to regulate the thickness of the article to be formed, and when raised out
of the mould can be moved laterally to the one side or the other so as to permit of the
removal from the mould of the moulded article.
In the aforesaid improved arrangement of apparatus 1 thus provide, in combination,
means respectively for rotating the mould at any desired constant or differential speed,
for rotating the falso bottom at any desired relative speed, for regulating the thick-
ness of the article being moulded, for forming open bottomed or closed bottomed
tubular or dished articles and for raising the false bottom within the mould for
ejecting the moulded article.
In manufacturing tubular articles in such improved apparatus, the plunger is firstly
lowered into the mould, the molten metal is then poured into the mould which is
simultaneously rotated so as to cause the metal to fly to its inner circumference to a
thickness determined by a removable gauge-ring, 55, applied to the mouth thereof
and by the plunger which is caused to rotate by its frictional contact with the molten
metal. By such improved means all tendency of the metal to gravitato and to form
interiorly tapered articles is avoided, and the formation of the latter of oven thickness
throughout is ensured. As the metal sets, the speed of rotation of the mould is
gradually lowered, and when the moulded article is ready for removal the ram is
operated so as to eject the same from the mould.
When a closed bottomed article is being formed the false bottom is rotated at a
slower speed than the mould, but if an open bottomed article is being formed the
falso bottom is rotated at a greater speed than the mould.
Having now particularly describal and ascertained the nature of my said inven-
tion and in what manner the same is to he performed 1 declare that what I
claim is :-
1. In apparatus employed in moulding tubular and dished articles from molten
material, in combination, a mould and falso bottom, means respectively for rotating
the mould at any desired constant or differential sped, for rotating the false bottom
at any relative speed, for regulating the thickness of the article being moulded, for
forming open bottomed or closed bottomed tubular articles, and for raising the false
bottom within the mould for ejecting the moulded article.
2. The process of manufacturing tubular and dished articles from molten metal
consisting in lowering an adjustable plunger within the mould, pouring molten metal
into the mould, rotating the mould so as to cause the metal to fly to the inner
circumference of the mould to a thickness determined by the plunger which rotates
by frictional contact therewith, and rotating the false bottom of the mould at a
relatively greater or lesser speed than the mould accordingly as an article with an
open or closed bottom is required.
3. As new articles of manufacture, tubular and dished articles moulded from
molten metal in apparatus operating in the improved manner hereinbefore
described.
4. In apparatus employed in the moulding of tubular and dished articles from
molten motal, in combination, a mould, 5, frictional gearing, 6, and, 13, a spring, 19,
differential frictional gearing, 16, and, 17, a false bottom, 31, change-wheel-
gearing, 27, 28, 29, 30, for differentially rotating the saine relatively to the mould,
a depending rod, 32, connected to the falsu bortom and means for raising the same
within the mould and ejecting the formed articls, a vertically arranged plunger, 33,
rotating freely on its support and menus for lowering and adjusting the plunger
relatively to the inner surface of the mould for adjusting the thickness of the article
to be formed and for raising the plunger out of the mould and laterally shifting it,
and means for actuating the apparatus by power.
Dated thio 7th $35 1000
DAY, DAVIES & HUNT,
821, High Holborn. London, W.C., Agents for the Applicant.