Improvements in Dies or Mouth Pieces for Moulding or Shaping Clay and other Plastic Materials.
Year: 1894

page_text: Date of Application, 1st May, 1894
Complete Specification Left, 31st Jan., 1895-Accepted, 23rd Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Dies or Mouth Pieces for Moulding or Shaping
Clay and other Plastic Materials.
I, DAVID LEWIS, of No. 50 Brecon Road, Merthyr Tydvil, in the County of
Glamorgan, Mechanical Engineer, do hereby declare the nature of this invention
to be as follows:-
My invention has reference to a construction of die or mouth piece for forming
a clod into the required shape whilst being delivered from a machine of any kind
such as either a vertical or horizontal clay pugging or mixing machine, used for
making clods of clay, and other materials used in the manufacture of bricks, tiles,
pipes, tuyeres and other such articles.
My improved die which is made of any suitable hard material such as cast iron
or brass is made internally to taper or diminish in cross sectional area considerably
from the entrance end up to a certain point in its length; then follows a parallel
portion succeeded by a portion that gradually and slightly increases in cross
sectional area towards the delivery end. The taper of the entrance portion, the
length of the parallel portion, and the taper and length of the delivery portion can
be varied according to requirement. Such a die may be made in one piece or
otherwise, and with or without a steam jacket or case. I find that a die constructed
as described will deliver a clod very stiff and free from cracks, which can be
pressed straight off into bricks or other goods or cut by wires into bricks; that
lubrication of the clod may be dispensed with, thus saving not only the cost of oil
but also much time in drying the bricks on the stove floors: moreover the die is
more durable than fustian or moleskin dies which often require relining that entails
considerable expense and delay.
Improvements in Dies or Mouth Pleces for Moulding or Shaping
Clay and other Plastic Materials.
I, DAVID LEWIS, of No. 50 Brecon Road, Merthyr Tydvil, in the County of
Glamorgan, 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 has reference to a construction of die or mouth piece for forming
a clod into the required shape whilst being delivered from a machine of any kind,
such as either a vertical or a horizontal clay pugging or mixing machine, used for
making clods of clay and other materiale employed in the manufacture of bricks,
tiles, pipes, tuyeres, and other such articles.
My improved die, which is made of any suitable hard material such as cast iron
or brass, is made internally to taper or diminish in cross sectional area considerably

page_text: from the entrance end up to a certain point in its length; then follows a parallel
portion succeeded by a portion that gradually and slightly increases in cross
sectional area towards the delivery end. The taper of the entrance portion, the
length of the parallel portion, and the taper and length of the delivery portion can
be varied according to requirement. Such a die may be made in one piece or
otherwise, and with or without a steam jacket or case. I find that a die constructed
as described will deliver a clod very stiff and free from cracks, which can be
pressed straight off into bricks or other goods or cut by wires into bricks; and that
lubrication of the clod is dispensed with, thus saving not only the cost of oil. but
also-much time in drying the bricks on the stove floors: moreover the die is more
durable than fustian or moleskin dies, which often require relining and thus entail
considerable expense and delay.
In the accompanying illustrative drawings,
Fig. 1 is a longitudinal section, and Fig. 2 an end view of a die according to this
invention without a steam jacket; and
Figs. 3 and 4 are similar views of such a die provided with a steam jacket.
In each of the examples shown the die is made. in one piece of metal and is of
rectangular form in cross section. As shown its internal cross-sectional area
decreases cousiderably from the entrance end A to the point B; from B to C,
which is a distance that is considerable relatively to the length of the die, it remains
uniform; and from C to D it very slightly increases.
The steam jacket is formed by a Hange E, a casing F bolted to the said flange,
and a plate G bolted to the casing F and arranged to form a steam tight joint with
the adjacent end of the die. F and F are respectively an inlet and an outlet for
the steam. The taper and length from A to B, the cross sectional area and length
from B to C, and the taper and length from C to D can be varied to suit
circumstances.
The die instead of being of rectangular shape in cross section, may be of square,
circular or other shape, or size according to the desired cross sectional form of the
clod.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. For moulding or shaping clay or other plastic material, a die or mouth piece
formed of hard material and the internal cross sectional area of which diminishes
considerably from the entrance end for a portion of its length, is then of uniform
cross sectional area for some distance, and is then of gradually and slightly
increasing cross sectional area towards the delivery end, substantially as herein
described.
2. The improved die or mouth piece constructed as herein before described with
reference to and shown in Figs. 1 and 2 and the modification thereof hereinbefore
described with reference to and shown in Figs. 3 and 4 of the accompanying
drawings.
01
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1007
ings.
Batca
THIS
91st day of January 1995.
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.