Improvements in Machinery for Moulding and Pressing Bricks, Tiles, and the like.
Year: 1894

page_text: Date of Application, 20th June, 1894
Complete Specification Left, 20th Mar., 1895-Accepted, 11th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Moulding and Pressing Bricks,
Tiles, and the like.
I HENRY TUKE of The Hunslet Lake Engineering Works, Hunslet, Leeds in
the County of York, Mechanical Engineer, do hereby declare the nature of this
invention to be as follows:-
My invention refers to that class of moulding and pressing machinery, in which
the bricks are moulded in a series of moulds arranged round the circumference of a
cylinder, and are afterwards pressed in a separate press; the clay being forced
into the moulds by means of a screw or other feeder from a pug mill or other
supply.
The object of my invention is to increase the capacity, ie, the output of such
machines, and for this purpose I give to the mould cylinder a constant uninterrupted
rotation; the speed of rotation and the rate of feed past the mouth of the pug mill
being such as to completely fill the moulds. As the moulded brick arrives at the
opposite side, it is pushed out so as to fall directly into the dic of the pressing
machine or on to a table from which it is pushed sideways into the die of the
pressing machine; this machine being placed somewhat sideways to the delivery
side of the mould cylinder. As the mould cylinder is in constant rotation, it is
necessary to have special mechanism for pushing out the moulded brick; such
mechanism acting automatically and in unison with the rotation of the mould.
For this purpose I provide a fixed horizonta! cross shaft immediately within the
inner circumference of the mould cylinder, and on the delivery side of the axes of
the mould cylinder. On this shaft is mounted loose, (i.e. capable of rotation about
the shaft), a wheel or rather three or more wheel teeth, and the inner side of the
mould dies are formed as corresponding toothed surfaces with which the teeth
before-mentioned engage. The pitch and positions of the teeth and dies are such
that as the mould cylinder rotates, the toothed surface of one of the brick dies
catches against one of the above-mentioned teeth and rotates the teeth bringing the
next tooth round so as to engage with and force outwards the next dic, thus
expressing the moulded brick on to the press dies or on to the table leading to
the same.
In order to lessen the time in transferring the moulded brick to the pressing die,
I place the press die immediately in front or close to one side of the mould cylinder
on the delivery side, and so form the mouthpiece of the die, that the expressed
moulded brick tilts or falls over into its proper position on the die.
The pressing block actuated preferably by a toggle arrangement descends
vertically on to the brick.
The pressed brick is lifted out of the die by means of a vertical pusher actuated
from beneath.
The gearing actuating the presser is so arranged as to cause this to rise and fall
once as each inould passes the die.
Dated this 19th day of June 1894.
J. CLARK JEFFERSON,
2, East Parade, Leeds, Agent for Applicant.

page_text: Improvements in Machinery for Moulding and Pressing Bricks,
Tiles, and the like.
HENRY TUKE of The Hunslet Lake Engineering Works Hunslet, Leeds, in
the County of York Mechanical 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:-
My invention refers to that class of moulding and pressing machinery in which
the bricks are moulded in a series of moulds arranged round the circumference of a
cylinder, and are afterwards pressed in a separate press, the clay being forced
into the moulds by means of a screw or other feeder from a pug mill or other
supply.
The object of my invention is to increase the capacity, ie, the output of such
machines, and for this purpose I give to the mould cylinder a constant uninterrupted
rotation; the speed of rotation and the rate of feed past the mouth of the pug mill
being such, that the moulds are completely filled with clay. As the moulded brick
arrives at the opposite side, it is pushed out so as to fall directly into the die of
the pressing machine; or on to a table from which it is pushed sideways under
the die of the pressing machine; this machine being placed sideways on the
delivery side of the mould cylinder. As the mould cylinder is in constant rotation,
it is necessary to have special mechanism for pushing out the moulded brick, such
mechanism acting automatically and in unison with the rotation of the mould
cylinder. For this purpose I provided a fixed horizontal cross shaft immediately
within the inner circumference of the mould cylinder, and on the delivery side of
the axle of the mould cylinder. On this shaft is mounted loose, (ie, capable of
rotation about the fixed shaft), a wheel or roller formed with three teeth or cam
like projections, and the innerside of the mould dies are formed as corresponding
toothed or cam surfaces, with which the teeth or cain like projections engage.
The relative form and positions of the teeth or cam projections on the roller or
wheel and of the corresponding surfaces of the dies are such, that as the mould
cylinder rotates, the surface of one of the bricks or mould dies catches against to
one of the teeth or cam projections above mentioned, rotating the wheel or roller so
as to bring the next tooth or eam projection round into position ready to engage
with the inner surface of the next succeeding mould die. During this movement
the tooth or eam of the roller forces the die outwards, expressing the moulded brick,
either so as to fall directly under the pressing die, or on to a table along which it is
transferred to the press.
1
In order to lessen the time usually taken up in transferring the moulded brick to
the press, place the press immediately in front of, or close to one side of the
mould cylinder and on the delivery side thereof; and in the former case I so form
the mouthpiece of the press mould, that the moulded brick on being pushed out
from the mould cylinder, falls into the press mould and in falling tilts or turns half
round. The advantage of this arrangement is that the pressure of the compressing
die of the brick press acts against the opposite side of the brick to that against
which the pressure of the mould dies act, whereby the compression of the finished
pressed brick is made more uniform.
The top die of the brick press is actunted preferably by a toggle arrangement,
and the pressed brick is lifted out of the mould by means of a pusher actuated
from beneath. The gearing actuating the press is so arranged as to cause the top
die to rise and fall once at the proper times as required by the rotation of the mould
cylinder.
And in order that my invention and the manner in which the same is to be

page_text: performed may be more readily and clearly understood, I have annexed hereto the
accompanying drawings, in which
Fig. is a side elevation, and Fig. 2 a front elevation (both broken through so
as to shew the mould cylinder in section), of a combined moulding and pressing
machine, e, in which the press is placed to one side of the mould cylinder and
carried by the same main casting.
a is the mould cylinder, shewn black in section, mounted on the shaft, and
driven with a constant uninterrupted rotation from the shaft c by means of the
toothed wheels indicated by the dotted lines d and e in Fig. 1. is the mouthpiece
of the pug mill, abutting against the mould cylinder. are the mould spaces or
moulds formed in the cylinder a. is an overflow channel to conduct back the
excess of clay (forced towards the cylinder) back to the pug mill or mixer.
mand are the mould dies or pistons, rectangular in cross section. is the fixed
horizontal shaft within the inner circumference of the mould cylinder, and on the
delivery side of the axis of the latter. is the (triple) cam or toothed roller,
mounted loose on the shaft. The number of cam projections or teeth may
conveniently be varied according to the diameter of the mould cylinder. The
inner ends or sides of the mould dies or pistons are suitably formed as shewn to
work and engage with the before mentioned cam projections or teeth of the wheel
or roller j. As the mould cylinder revolves, the mould dies or pistons for the time
being in the lower half of the cylinder are at their greatest distance outwards, as
shewn by the dies or pistons lettered m. As the dies or pistons come opposite the
month of the pug mill, the pressure of the clay entering the mould forces back the
die or piston until caught by the stops when they occupy the position shewn by
the dies or pistons lettered a. The speed of rotation of the mould cylinder and the
rate of feed of the pug mill are so regulated, that each mould is properly filled, and
the clay is cut-off against the sharp edge of the mouth of the pug mill. As the
moulded brick arrives at the opposite (i.c. delivery) side of the cylinder, the inner
side of the piston or die comes in contact with one of the cams or teeth of the wheel
or roller j, and cause the latter to rotate; which in its turn forces the die or piston
outwards, thus forcing out the moulded brick. The same movement brings round
the next tooth or cam into such a position as to ensure its engaging with the next
succeeding die or piston.
The table on to which the brick falls is placed at such a distance below the
level at which the brick is ejected, that the brick at first overhanging tilts over in
falling on to the table. To the table and abutting against the mouth of the
mould I attach the incline plate o, and opposite to this a similar shorter plate p
which form the mouthpiece for the mould of the press, where the press is placed
immediately in front of the mould cylinder. In the drawings the press is shewn to
one side of the cylinder, in which case the plates o and p ensure the moulded brick
falling into proper position for being pushed under the pressing die by means of the
pusher lever which is mounted on the shaft r. The shaft carries a short lever s,
carrying at its end a runner engageing with the barrel camt on the shaft c, whereby
the pusher is operated at the proper times. The top pressing die is actuated
from a crank on the shaft e by means of the connecting rode and toggle
arrangement w.
The pressed brick is lifted out of the mould by means of a vertical pusher
actuated by the lever e, rod y, and cam on the shaft c.
Although I have described the multiple cam or toothed wheel jas placed within
the interior of the cylinder, it will be evident that the same may be placed on a
shaft exterior to the cylinder, in which case the pug mill is arranged to force the
clay into the moulds from the interior of the cylinder, ie. the month of the pug
mill is arranged to project within the cylinder, and curved or formed to abut
against the innerside of the cylinder. Also suitable arrangements, as for example
a travelling band, are provided to carry away the moulded brick from the interior
of the cylinder.
Further, though less suitably and conveniently, by forming the cam i to give a

page_text: shorter stroke, this arrangement of multiple cam and rotating cylinder with
moveable dies may be employed for pressing bricks. A curved stop plate is then
provided, abutting against the cylinder in the position where the compressing
movement occurs, and a second multiple cam conveniently placed opposite the
lowest part of the cylinder and giving a larger stroke may be then provided for
expressing the pressed bricks.
Lastly in a moulding machine the multiple cam may he arranged opposite the
lowest part of the cylinder, and a travelling band arranged underneath to receive
and carry away the moulded bricks.
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 1
claim is :-
1. In machinery for moulding or pressing bricks the use of a continuously
(.e. non-intermittently) rotating mould cylinder provided with moveable pistons or
dies fitting in the moulds of said cylinder and actuated by a cam or cams situated
within the inner or exterior to the outer circumference of the cylinder.
2. In rotary cylinder machines for moulding or pressing bricks, the use of a
multiple cam or toothed wheel arranged to engage with and to operate dies or
pistons fitting in the moulds of said cylinder.
3. In a rotary cylinder machine the combination of a constantly rotating mould
cylinder having moulds formed therein and dies or pistons fitting in said moulds,
with a multiple cam or toothed wheel engaging with the projecting ends of said
dies or pistons for the purpose of expressing or compressing the moulded bricks.
4. A brick moulding machine comprising a constantly rotating mould cylinder
fitted with moveable pistons or dies, a pug mill with month abutting against said
cylinder for filling said moulds, and a multiple cam or toothed wheel engaging with
said dies or pistons all substantially as herein set forth and illustrated in the
accompanying drawings.
5. The combination with the subject-matter of Claim 4 of a press machine
having iable placed at such a position below the point at which the moulded
bricks are expressed from the mould cylinder and provided with inclined plates such
as o and " all substantially as and for the purpose herein set forth and as illustrated
in the accompanying drawings.
6. The arrangement and combination of brick moulding and brick pressing
machinery substantially as herein set forth and illustrated in the accompanying
drawings.
Dated this 19th day of March 1895.
J. CLARK JEFFERSON,
2, Enst Parade, Leeds, Agent for Applicant.