Improved Vertical Chill-mould, with Contractible Core for Tubular Castings.
Year: 1895

page_text: COMPLETE SPECIFICATION.
Improved Vertical Chill-mould, with Contractible Core for Tubular
Castings.
We, HUGO JINDRICH and EDUARD JINDRICH both of No. 44 Kerepesi-ut,
Budapest Foremen, do hereby declare the nature of our 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 a chill-mould provided with contractible core, by means
of which it is possible to cast tubular bodies with far greater rapidity than
hitherto and, at the same time, to effect a considerable saving both of costs and
labour, seeing that there is no waste whatever; a further great advantage offered
is that the tubes can be removed from the mould immediately after the metal is
run into same.
We will now describe the invention with reference to the accompanying drawings
in which :-
Fig. 1 is a plan view of the mould and
Fig. 2 a vertical section of same,
Fig. 3 is a horizontal section of one of the cylindrical parts forming the
mould;
Fig. 4 is a view of the core on a larger scale, the parts connected therewith
being shown in section;
Fig. 5 is a horizontal section of same on an enlarged scale and
Fig. 6 a view of the metal locking slide.
The mould is composed of several cylindrical parts a arranged above and
connected to each other by flanges b. The lowest part a forms at the same time
the socket of the tube and is closed by bottom plate e, whereas the uppermost
part a is provided with an annular channel or receptacle c for receiving the metal.
The mould shown by way of example in the accompanying drawing consists of
two parts supported on hinges d provided with ball bearings 7 and turning on
pivots of bracket or support f. It will therefore be evident that either the whole
mould may be turned horizontally on pivots h, or the two parts of the mould
opened independently of each other. The mould is held in the closed position by
It will be seen
means of wedges i (Fig. 3) or any other suitable locking device.
that the chill may thus be easily and rapidly opened after the metal is run in and
that same is therefore well adapted for making castings in large quantities.
The contractible core consists of the cylindrical casing j, open or slotted along
its whole length, such opening being covered from within by a metal sliding
piece (Fig. 6) somewhat broader than the opening. The casing is provided
on both of its edges and opposite cach other with bolts or lugs for guiding the
slide k, such lugs entering slots m, likewise arranged in pairs in the slide k and
converging towards their lower ends (Fig. 6). On raising the slide k, therefore,
the casing is drawn together somewhat i.e. its diameter is reduced. This core
formed by the parts j, k, is mounted on the spindle n, the casing ; being for this
purpose provided on its inner side and near its upper and lower ends with wedge-
like shoulders o, arranged in alignment with each other, the upper ones converging
towards the lower ends of their wedge-like surfaces and the lower ones towards
the upper ends of same. Cones or tapering blocks
on square heads
spindle n bear against the wedge-like surfaces of the shoulders o, the vertexes of
such cones being thus directed towards each other. The cones p may be made to
D
of the

page_text: screwed on both ends of the spindle n
In order that such tension is uniform a
approach each other by turning the nuts
and the core j, k thus put under tension.
further cone 9 is arranged at the middle of the spindle and bears against
shoulders o, as at the ends of such spindle; this centre cone, however, is mounted
directly on a screwed part of the spindle n, to allow of same being adjusted.
The enlargement of the casing ; for the sleeve is formed by an ordinary open
metal ring t kept at the proper distance from the casing ; by means of pins .
Cores constructed in the manner described offer the advantage that the
customary costly and tedious wrapping by straw is dispensed with, while the
surrounding layer of loam or other material may be considerably thinner; there
is therefore also a further saving of material and time, seeing that the core dries
more rapidly and that the manipulation is very much simplified and facilitated.
The core can also be readily adjusted or put into position seeing that the lower
prolonged end of its spindle n passes through a hole in the centre of the plate e.
The construction of the shoulders o and cones q also allows any gases generated to
escape at the uppermost end of the core. Immediately after the metal is run in,
the nuts s are unscrewed to allow such gases to escape, and the core may be at
once easily removed by putting the hooks of the lifting device into the hole w in
the slide k and into a hole (not shown in the drawing) in the opposite side of the
casing
The lifting device first operates the slide k when the casing contracts and thus
allows of same being lifted out of the chill.
Having now 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. A vertical chill-mould for tubular castings provided with contractible core
and consisting of a series of cylinders (a) arranged above and connected to each
other by flanges (b) and which may be opened by turning horizontally on
hinges (d) running on ball-bearings (g) mounted in a vertical bracket (ƒ)
substantially as described and shown in the drawing.
2. In combination with a vertical chill mould for tubular castings, a core,
consisting of a casing (j) open along one side, a slide () covering such opening
from within and provided with converging slots (m) for guiding pins or lugs (1) of
the casing, substantially as described and shown in the drawing.
3. In combination with a vertical chill mould for tubular castings, cones (9)
mounted on a spindle (n) and forced against the wedge-like surfaces of shoulders (0)
of the core casing by nuts (s) screwed on to the spindle (n), substantially as
described and shown in the drawings.
Dated this 18th day of Me 1805
E. P. ALEXANDER & SON.
Chartered Patent Agents,
19, Southampton Buildings, Chancery Lane, London, W.C., Agents.