Improvements in the Mode of and Means for Moulding Cylinders for Carding Engines and similar Machines.
Year: 1892

page_text: Date of Application, 1st Sept., 1892
Complete Specification Left, 29th May, 1893-Accepted, 15th July, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Mode of and Means for Moulding Cylinders for
Carding Engines and similar Machines.
I CHARLES CARR of 18 Hugomont Street Wortley Lane Leeds in the County
of York Moulder do hereby declare the nature of this invention to be as
follows:-
My invention refers to a new mode of and means for moulding cylinders for
carding engines and similar machines, which are at present moulded in sand by
placing the model in a deep circular moulding box and ramming the sand around
and within the model. The disadvantage of this method lies in the cost in time and
labour in filling and ramming the sand in the interior of the model, to form the core,
which is of comparatively large size.
My improved method consists in moulding the cylinder between the outer cylin-
drical box and an inner cylindrical box, which for the sake of distinction is herein-
after referred to as the core cylinder. This latter is formed by fastening together
several long rectangular perforated or grating plates, bent as segments of a
cylinder. The annular space between these cylinders is about 12 inches wide, so
that the sand which is rammed down on either side between these and the model is
somewhat over 5 inches in thickness on each side of the model. As the cylinders
to be cast are usually about 50 inches in diameter, the amount of sand required to
form the core piece is reduced to about one third (or less) the quantity required by
the present methods. In order to facilitate the taking to pieces of the inner core
cylinder one of the above mentioned plates (i.e. core cylinder plates) is formed
tapering slightly toward the bottom, and soon after the cylinder has been cast, this
wedge shaped plate is withdrawn to permit the core to contract as the metal cools.
The adjoining edge of the next side plate (or plates) is inclined to suit.
The ends of the cylinders for carding engines and similar machines are usually
left open, having a centre boss with radial arms cast on at each end. This boss and
the arms for the lower end of the cylinder, (as it is cast), are formed in the sand at
the bottom of the mould; and a'cross grating held down by lugs at the bottom end
inside the core cylinder prevents the metal of the boss and arms from rising whilst
the metal is fluid. A disc core plate is placed beneath the cross grating over
the boss.
In order to provide a bed for moulding the upper arms and boss, I provide lug
pieces or short brackets projecting inwards near the upper end of the inner core
cylinder plates, on which rest three gratings or plates. On these latter rests the
sand in which the mould for the boss and arms is formed. A top box is placed
over the whole, containing the mould for the upper half or top of the boss
and arms.
The various parts are provided with pins, pin holes, and cotters, for securing
them together, and also with projecting nails for holding the sand in the usual
manner. A couple of rings placed round the plates forming the core cylinder, and
wedges inserted between these and the core cylinder plates, still more firmly secure
these latter together.
Dated this 31st day of Aunt 1000
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Mode of and Means for Moulding Cylinders for
Carding Engines and similar Machines.
I CHARLES CARR of 18 Hugomont Street Wortley Lane Leeds in the County
of York Moulder 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:-
My invention refers to a new mode of and means for moulding cylinders for
carding engines and similar machines, which are at present moulded in sand by
placing the model in a deep circular moulding box and ramming the sand around
and within the model. The disadvantage of this method lies in the cost in time and
labour in filling and ramming the sand in the interior of the model to form the core,
which is of comparatively large size.
My improved method consists in moulding the cylinder between the outer cylin-
.drical box, and an inner cylindrical box, which for the sake of distinction is herein-
after referred to as the core cylinder. This latter is formed by fastening together
several long rectangular perforated or grating plates, curved as segments of a
cylinder. The annular space between these cylinders would be say about 12 inches
wide where the cylinder to be cast is about 50 inches in diameter; so that the sand
which is rammed down on either side of the model and between this and the outer
cylindrical box and the core cylinder is somewhat over 5 inches in thickness.
Hence the amount of sand required to form the core piece is reduced to about one
third (or less) the quantity required by the present methods. In order to facilitate
taking the inner core cylinder to pieces, one of the above mentioned plates (i.e. core
cylinder plates) is formed tapering slightly toward the bottom; and soon after the
cylinder has been cast this wedge shaped piece is withdrawn, to permit the core to
contract as the cylinder cools. The adjoining edge of one or of both the next side
plates is inclined to suit.
The ends of the cylinders for carding engines and similar machines are usually
left open, having each a central boss with radial arms or curved arms cast on
or attached to the cylinder ends. In order therefore to be able to withdraw
the above mentioned segmental plates after the carding cylinder has been cast, the
breadth of the segmental plates is made less than the longest dimension of the
sector or triangular space enclosed between two of the arms and the enclosed arc of
the cylinder.
The boss and arms for the lower end of the carding cylinder (as it is cast), are
formed in segmental blocks of baked or dry sand; so as to provide a firm support
for the (segmental) core cylinder, which are placed at the bottom of the moulding
pit, the cores for the arms and boss being on the under side of the segmental dry
sand blocks. A. cross grating held down by lugs at the bottom and inside of the
core cylinder prevents the metal of the boss and arms from rising, whilst the metal
is fluid. A. disc core plate is placed beneath the cross grating over the boss.
The upper arms and boss may be moulded on a bed of sand supported on three
or more gratings or perforated plates. These plates rest on lugs or brackets on
and projecting inwards from the upper part of the segmental core cylinder. One
of these plates is made so short that it can be pushed so far towards one side or end,
that the opposite end is pushed off the supporting lug or bracket, and then drops
down into the empty space within the core cylinder. This arrangement is for the
purpose of enabling the above mentioned tapered segmental plate to be got at to be
withdrawn. A top box is placed over the bed of sand covering the upper side of
the mould for the boss and arms.
Instead of making a sand bed in which to mould the boss and arms, these may be
moulded in segmental blocks of sand (cores), and dried or baked before being

page_text: placed in position; and the segmental cores covered by a loam plate. Or lastly
the arms and boss for the upper end may be loam moulded.
It will also be evident that by making the outer cylindrical box and the inner-
segmental core cylinder of suitable diameters, (i.c. respectively somewhat smaller
and larger than as above described), the carding cylinders by my method can be.
much more cheaply moulded in loam, than by the present methods.
And in order that my invention and the manner in which the same may be
performed may be more readily and clearly understood reference is given to the
accompanying drawings and to the letters and marks thereon.
Fig. 1 is a vertical section and Figs. 2 and 3 are respectively cross sections on
lines A. A and B B Fig. 1.
a a is the outer cylindrical moulding box.
bbare the segmental plates forming the inner or core cylinder. is the tapered
segment slightly narrower at the lower end. When this plate is withdrawn the-
core can contract as the metal cools. It will be evident that this plate can also be
readily withdrawn if the vertical joints 11 are formed after the manner indicated
in Figs. 4 and 5.
c and d represent respectively the moulds for the lower boss and arms in the
segmental dry sand core blocks e e. ff is a small circular disc of baked or dry
sand through the centre of which is passed the core piece for the boss.
g
hh is the cross grating plate held down by wedges against the lugs & cast on the
inside of the core cylinder plates, whilst i is the disc core plate placed beneath.
the grating hh over the boss; both for the purpose of preventing the metal of the.
boss and arms from rising whilst the metal is fluid.
represents the space occupied during the moulding by the cylinder model,.
and m and n the spaces (about 5 ins. wide) between the model and the core
cylinder and the outer cylindrical box a respectively into which space the sand is
rammed. The model for the cylinder to be cast may conveniently be much shorter.
than the intended cylinder, and is then successively raised as the sand is rammed
down on either side.
The arms and boss for the upper end of the cylinder may be moulded on the
sand bed r. This sand bed is supported on three grating plates op and 2 which
are carried by lugs k cast on the inside of the core cylinder plates bb. The centre-
plate o is so much shorter than the inside diameter of the core cylinder, that on
being pushed towards one end it is pushed off the supporting lugs at the opposite.
end and drops down in the open space within the core cylinder, so that the tapered
segmental plate & can be got at to be withdrawn.
uu are wrought iron rings placed round the core cylinder plates bb, which by
means of wedges hold the core cylinder plates securely together. The core
cylinder plates may be made in short lengths, so that cylinders of different
lengths can be readily cast in the same pit.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is:
1° The method of moulding cylinders having open ends, and arms and boss at.
one or both ends, for carding engines and similar machines, by forming the mould
for the cylinder between an outer cylindrical box and an inner core cylinder, said.
core cylinder being formed of segmental plates of such a width that they can
afterwards be withdrawn from the cast cylinder between the arms, and forming the
mould for the arms and boss at the lower end in segmental blocks of sand (i.e cores).
on which the segmental plates of the core cylinder can rest.
2° In moulding cylinders having open ends and arms and boss at one or both
ends, for carding engines and similar machines, the arrangement and use of an inner
core cylinder formed of segmental plates of such a width that they can be:
withdrawn from the cast cylinder between the arms of the same.
3° In moulding cylinders having open ends, and arms and boss at one or both.

page_text: ends, for carding engines and similar machines, the arrangement and use of an inne
core cylinder formed of segmental plates of such a width that they can be
withdrawn from the cast cylinder between the arms of the same, and segmental
sand cores for the boss and arms of the lower end on which cores the aforesaid
segmental plates rest.
4° The improved method and means for moulding cylinders having open ends,
and arms and boss at one or both ends, for carding engines and similar machines,
substantially as herein set forth and illustrated in the accompanying drawings.
Dated this 26th day of May 1893.
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.