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

page_text: Date of Application, 3rd May, 1890-Accepted, 7th June, 1890
Improved Means and Apparatus to be Employed in the Moulding of
Cylindrical and Tubular Articles from Molten Metal.
I, WILLIAM AMBLER, of Bradford, in the county of York, Engineer, do heroby
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 cylindrical and tubular articles from molten metal.
The improved apparatus is illustrated on the accompanying drawings, in elevation
in Fig. 1, in sido elevation in Fig. 2, and in plan view in Fig. 3.
The apparatus is constructed with an open-ended mould, 4, which is made of the
required internal formation and dimensions and is bolted to a table, 5, which is
supported by a tubular bracket, 6, bolted to a vertical turntable, 7.
The mould is also guided by an upper surrounding bracket, 8, which also is bolted
to the turntable and carries a series of steadying runners, 9. The table, »>, is driven
by frictional contact with a disc, 10, which is keyed to a shaft, 11, and prossed against
the table, 5, by a spring, 12, having its bearing in the hub of the turntable, 7. On
the other end of the shaft, 11, there is keyed a disc, 13, which is driven by frictional
contact with a disc, 14, which is keyed on a first-motion shaft, 15, the disc, 13, being
pressed against the disc, 14, by a spring, 16, having its bearing against the adjacent
standard, 17. The disc, 14, is mounted on the shaft, 15, with facility of to-and-fro
end way movement thereon to the extent of the radius of the disc, 13, and such
movements are caused to be effected by means of a clutch, 18, gearing with a
wormed shaft, 19, which is actuated, as desired, by a handwheel, 20.
The shafts, 15, and, 19, are supported by opposite side standards, 22, rising from
the foundation-plate, 23, and the shaft, 15, is fitted with loose and fast pullies (not
shown) and may be driven at any suitable speed.
The shaft, 11, works within a tubular shaft, 26, which is supported by opposite
standards, 17, rising from the foundation-plate, and on the front end of such latter
shaft the turntable, 7, is keyed. There is also keyed on the shaft, 26, a worm-wheel, 27,
which engages with a worm, 28, keyed on a shaft, 29, which is supported in opposite
side standards, 30, rising from the foundation-plate.
The shaft, 29, is adapted with an actuating hand-wheel, 31, and fast and loose
pulleys, 32, 33, by means of the former of which and a strap, 34, driven by a
pulley, 35, it can be rotated as may be desired for the purpose of turning the
turntable, 7, together with the mould, 4, and its attachments about the axis of the
shafts, 11, and, 26.
The table, 5, is made fast by a tubular hub, 36, to a toothed wheel, 37, which
actuates one, 38, of a pair of superposed connected change-wheels, 38, 39, which are
supported by a stud, 40, carried by a bracket, 41, bolted to the brackets, 6, or
otherwise carried by the turntable, 7. The other change-wheel, 39, actuates a
changewheel, 49, keyed on a rod, 42, which rises through the tubular hub, 36, and
into the interior of the mould. Within the mould the rod, 42, is fitted with a
removable false bottom, 43, which is keyed thereon and is made of a conical
formation, but if it be desired to form the tube or tubular article with a closed
bottom end then such conically formed false bottom may be replaced by a false bottom
of a cheese-shaped or analogous formation made in one piece or in concentric rings.
The lower projecting end of the rod, 42, is made with surrounding circular corruga-
ions, as at, 44, which engage with a correspondingly toothed wheel, 45, keyed
n a shaft, 46, which is supported by brackets, 47, bolted to the turntable and is

page_text: POVRED With spokes or nun wheel, Ju, ny which it may be rotated as my De
desired.
In the aforesaid improved arrangement of apparatus I provide, in combination,
means respectively for rotating the mould at any desirable constant or differential
speed, for rotating the false bottom at any desirable relative speed, for raising and
lowering the false bottom within the mould as may be required, for causing the mould
and its attachments to assume different positions during the manufacture of the articlo
as may be required, and for forming open bottomed or closed hottomed tubular
articles.
In manufacturing tubular articles in the above described improved apparatus, at the
beginning of the operation the mould occupies the vertical position indicated on the
accompanying drawings, and the false bottom occupies the raised position indicated in
fig. 2. As the molten metal is poured into the mould, the latter is rotated which
causes the metal to fly to the inner circumference of the mould to a thickness
determined by a removable ring, 48, applied to the mouth thereof; as this thickness
is reached the tube is elongated by a gradual lowering of the false bottom during the
continuance of the pouring of the molten metal. When the false bottom has reached
the bottom of the mould the pouring of the metal is discontinued and the turntable
is rotated about its axis a quarter circle which brings the moukl into a horizontal
position. While it remains in such position its speed of rotation is increased, and by
such means acting conjunctively with the lowering false bottom any tendency of the
metal to gravitate more to one end than to the other and to proluce interiorly tapered
tubes is avoided, and the formation of the tubes with interior parallel sides 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 turntalilo is rotated a further quarter
circle which canses the mould to be inverted when the moulded article falls out or may
be gradually lowered.
If an open-bottomed tubular article is being formel then the conically formed false
bottom may be used and is rotated at the same speed as the mould, or the cheese-
shaped false bottom may be used and be rotated at a greater speed than the mould,
and if a closed bottomed tubular article is being formed the cheesu-shaped false
bottom is used and is rotated at a slower speed than 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 :-
1. In apparatus to be used in the moulding of cylindrical and tubular articles
from molten metal, in combination, a mould and false bottom, moans respectively
for rotating the mould at any desirable constant or differential speed, for rotating
the false bottom at any desired relative speed, for raising and lowering the false
hottom within the mould as required, for carrying and causing the mould and its
attachments to assume different positions during the manufacture of the article as
required, and for forming open bottomed or closed bottomed tubular articles, as
sat forth.
2. The process of manufacturing tubular articles from molten metal, consisting
in pouring the molten metal into the mould while in a vertical position, rotating
the mould so as to cause the metal to fly to the inner circumference of the mould
to a determined thickness, elongating the tube by a gradual lowering of the false
bottom during the continuance of the pouring of the molten metal until the false
bottom has reached the bottom of the mould, then discontinuing the pouring of
the metal causing the mould to assume a horizontal position and increasing the
speed of rotation while in such position until the metal begins to sot, then gradually
lowering the speed of rotation of the mould until the moulded article is ready for
removal, then causing the mould to he inverted for the removal of the moulded
article, there being used in such process if an open bottomed tubular article is being
formed a conically formed false bottom rotated at the same speed as the mould or a

page_text: cheese-shaped false bottom rotated at a greater speed than the mould, and if a closed
bottom tubular article is being formed a cheese-shaped false bottom rotated at a
slower speed than the mould.
3. As new articles of manufacture cylindrical and tubular articles moulded from
molten metal in apparatus operating in the improved manner hereinbefore described.
4. In apparatus to be employed in the moulding of cylindrical and tubular articles
from molten metal, in combination, a mould, 4, frictional gearing, 5, and, 11,
springs, 12, and, 16, differential frictional gearing, 13, and, 14, and means for actuating
the same by power.
5. In apparatus to be employed in the moulding of tubular and cylindrical articles
from molten metal, in combination, a mould, 4, frictional gearing, 5, and, 11,
springs, 12, and, 16, differential frictional gearing, 13, and, 14, a false bottom, 43, and
change wheels, 37, 38, 39, 49, for differentially rotating the same relatively to the
mould, and means for actuating the same by power.
6. In apparatus to be employed in the moulding of cylindrical and tubular articles
from molten metal, in combination, a mould, 4, frictional gearing, 5, and, 11,
springs, 12, and, 16, differential gearing, 13, and, 14, a rising and falling false
bottom, 43, change wheel gearing, 37, 38, 39, 49, for differentially rotating the same
relatively to the mould, a depending roil, 42 connected to the false bottom and means
for raising and lowering the same within the mould, and means for actuating the same
by power.
7. In apparatus to be employed in the moulding of tubular and cylindrical articles
from molten metal, in combination, a mould, 4, frictional gearing, 5, and, 11,
springs, 12, and 16, differential frictional gearing, 13, and, 14, a rising and falling
false hottom, 43, change wheel gearing, 37, 38, 39, 49, for differentially rotating the
same relatively to the mould, a depending rod, 42, connected to the false bottom and
means for raising and lowering the same within the mould, a turntable, 7, carrying
the mould and its attachments, worm gearing, 27, 28, whereby the turntable can be
caused to assume vertical, horizontal and inverted positions, and means for actuating
the apparatus by power.
Dated this and M. 1900.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicant.