Improvements in Moulding Machines for Cylindrical or Bulging Hollow Castings.
Year: 1896

page_text: Date of Application, 8th Sept., 1896-Accepted, 17th Oct., 1896
Improvements in Moulding Machines for Cylindrical or Bulging
Hollow Castings.
A communication by THE EISENHUTTENWERK MARIENHÜTTE BEI KOTZENAU,
ACTIEN GESELLSCHAFT (vorm. SCHLITTGEN & HAASE), of Marienhütte,
near Kotzenau, Silesia, in the Empire of Germany, Iron Manufacturers.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool, and 6, Bank Street, Manchester,
both in the County of Lancaster, 118 New Street, Birmingham in the County of
Warwick and 322 High Holborn in the County of Middlesex, Civil 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:-
This invention has for its object a moulding machine for cylindrical or bulging
hollow casting.
In the accompanying drawing-
Figures 1 and 2 are vertical sections of the machine, and
Figure 3 a plan view.
The machine is characterised by both the boxes (core and mould) which are
both connected with the same mould plate, being capable, when the moulding is
completed, of being drawn away from the core and pattern simultaneously, both as
regards the two halves of the inould and the two halves of the core box which
lies on the other side of the mould plate, the core being rendered accessible by
the lowering of the discharging table and the whole arrangement being such that
any damaging of the sand moulds is avoided.
With this object, a mould plate e revolubly mounted in a fixed frame a by means
of trunnions 6 is arranged as follows:-
A screw spindle s is mounted in the part of the mould plate which is provided
with the trunnions b, said spindle being revoluble across the axis of rotation of
the said mould plate, and provided in one longitudinal half with a right hand
thread and in the other with a left hand thread. On each half of the screw
there is mounted a support clc each in a groove or recess in the mould plate,
on which supports the two parts forming the core box are mounted or fixed,
whilst a third part is, which serves for forming the bottom of the core, is firmly
connected with the mould plate. This third part of the core box serves also for
securing a correct movement of the two side parts which are capable of being
moved apart, and which for this object are guided by flange-like extensions on the
rear side of the bottom part 3. On the opposite side of the mould plate c two
halves q' q of a divided plate are attached to the two supports c'c', which divided
plate supports the two halves k' of the moulding box. The two halves k³ of
the moulding box which are connected with one another in the ordinary manner
by means of books and lugs or eyelets, are fixed on the two halves of o³ of the
divided plate by means of keys, as shown in Figure 1. These two halves q'g'
themselves are also securely and precisely guided by the mould plate, so that even
after a loosening of the support ce on the two halves of the screwed spindle,
the two halves of the core box and the two halves k k of the moulding box
are not in the least affected as regards their exact parallel movement.

page_text: The moulding takes place by means of this machine in the following manner :-
The two halves of the mould box are first connected with the mould plate,
the latter is then revolved 180° and the table d with the receiving carriage e (which
table is capable of being moved vertically up and down) is raised by means of
rack gearing by pulling a weighted lever h until the carriage rests against the
outer edge of the moulding box k¹³, the core box k is then placed on top of the
mould plate and keyed thereto, and the core then formed.
As soon as this is done the discharging table d and its carriage e are lowered,
the moulding plate is turned round on its trunnions, and the discharging table d
with the carriage e is again raised, so that the latter then rests against the outer
edge of the core moulding box k, Figure 1. The mould is then formed. After
the removal of the runner stick or ingate pattern and the various keys, the
spindles is set in rotation, and the two box halves k¹ k are thereby simultaneously
removed or drawn off from the pattern m, and the two halves of the core box
from the core, a thoroughly parallel movement of all the moving parts being
secured by a suitable guiding of the halves g¹ q³ of the divided plate, and also the
halves of the core box.
As soon as the halves of the core mould are moved so far to each side that the
core between them can be moved downwards, the table d is lowered, the carriage e
with the core lying thereon drawn forward, the box k with the core lifted off, and
placed together with the two halves of the mould to form the casting
mould.
If it be a question of making cylindrical hollow castings, the moulding machine
remains precisely the same, only the two parts of the core box and the
pattern m then assume a suitable cylindrical form.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what 1 claim is :-
A moulding machine for cylindrical or bulged hollow casting in which the two
halves (kk) of the moulding box (or rather the supporting plates q' q' thereof)
which are arranged on one side of a revolubly mounted mould plate (c) are so
connected with the movable parts (i) of the core box which are mounted on
the other side of said mould plate, that the said parts of the mould and core boxes
may be simultaneously drawn off from the pattern (m) and from the core, by
means of a right and left hand screw (s) mounted in the mould plate, an exact
parallel movement being secured by suitably guiding the supporting plates (99)
of the mould box and the parts (i) of the core box substantially as hereinbefore
described.
Dated this 7th day of September 1896.
WM. P. THOMPSON & Co.,
Agents.