Improvements in Moulding Boxes as used in Moulding Lead Pipes and like Objects by Hydraulic Pressure.
Year: 1898

page_text: Date of Application, 18th July, 1898
Complete Specification Left, 18th May, 1899-Accepted, 18th July, 1899
[Communicated from abroad by
JUSTUS
CHRISTIAN
UL
DRAUN,
Nurnberg,
Germany.]
Improvements in Moulding Boxes as used in Moulding Lead Pipes
and like Objects by Hydraulic Pressure.
I, WALTER SIMPSON, of 9, Boardman Street, Eccles, near Manchester, in the
County of Lancaster, Secretary, do hereby declare the nature of my said invention
to be as follows: ―
The moulding boxes heretofore employed for the manufacture of lead pipes and
like objects by hydraulic pressure, consist of two parts, between which the pipe
forming core and die are arranged. Such construction of boxes allows the cores
or dies to alter their position and make untrue piping, besides very often causing
the metal to break the box. Morcover, boxes arranged in such fashion with the
cores and dies screwed into them, and the split in the middle, are very liable to
jam up, and be incapable of adjustment or removal to suit the thickness of tube,
or different sizes of piping.
According to my invention, the box consists of one solid block of steel, which
is screwed on to the ram of the hydraulic press, whilst the container carrying the
lead or metal to be treated screws into the box.
The special feature of the box is that the interior pipe forming part is bored
out of the solid while a steel cone which fits therein provides for an equal distribu-
tion of the lead or metal all round the core or die, which latter are inserted in
the bore of the block and kept in position by a powerful nut on each side, which
may be steam jacketed and which nuts are connected to either the core, or the
die by means of a movable joint or pin so that the core or the die may be
automatically withdrawn on slackening the nuts.
Laicu
"ING TO Con mor s
1000.
WALTER SIMPSON,
By John G. Wilson & Co.,
55, Market Street, Manchester, Agents.
COMPLETE SPECIFICATION.
Improvements in Moulding Boxes as used in Moulding Lead Pipes
and like Objects by Hydraulic Pressure.
I, WALTER SIMPSON, of 9, Boardman Street, Eccles, near Manchester, in the
County of Lancaster, Secretary, 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:
The moulding boxes heretofore employed for the manufacture of lead pipes and

page_text: like objects by hydraulic pressure; consist of two parts, between which the pipe
forming core and die are arranged. Such construction of boxes allows the cores
or dies to alter their position and make untrue piping, besides very often causing
the metal to break the box.
Moreover, boxes arranged in such fashion with the cores and dies screwed into
them and the split in the middle, are very liable to "jam up" and be incapable
of adjustment or removal to suit the thickness of tube, or different sizes of piping.
According to my invention, the box consists of one solid block of steel, which
is screwed on to the ram of the hydraulic press, whilst the container carrying the
lead or metal to be treated, screws into the box. The special feature of the box
is that the interior pipe forming part is bored out of the solid while a steel core
which fits therein provides for an equal distribution of the lead or metal all round
the core and (or) die, which latter, are (or is) inserted in the bore of the block
and kept in position by powerful nuts which may be steam jacketed and which
nuts are connected to the core and die by means of a moveable joint or pin so
that the core or die may be automatically withdrawn on slackening the nuts.
The accompanying drawings illustrate the improvements, Fig. 1 being a
vertical section and Fig. 2 a transverse section of a pipe moulding press.
(A) is the improved moulding box made out of a solid block of steel and screw-
ing on to the hydraulic ram (B). The container (C) for carrying the lead, screws
into the upper part of the moulding box as illustrated. (D) is the steel core
and (E) the die, fitted in the core of the moulding box, and held in position by
powerful nuts (F).
In forming a tube the lead is first placed in the container (C). The hydraulic
ram (13) is then set in motion and the moulding box slowly raised against the
stationary plunger (G), whereby the lead is caused to ooze through the space
between the steel core (D) and die (E) in continuous tube form, as long as there
is a supply of metal in the container (C) which is replenished at each stroke of
the ram.
To protect the core from the direct pressure of the ram (1) against the
plunger (G) the moulding box is formed with a curved bridge (H).
For assisting in the formation of the lead tube the nuts (F) may be steam
jacketed, but in practice I prefer to steam jacket the moulding box as illustrated.
The nuts (F) may be connected to the die and core respectively by a small pin
or moveable joint (J) so that the die and core may be readily withdrawn on
slackening the nuts.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1: A moulding box in one solid piece and with a core bored out of the solid,
and fitted with a steel core and die under control of powerful nuts substantially
as and for the purposes set forth.
Dated this 17th day of May 1899.
WALTER SIMPSON,
By John G. Wilson & Co.,
Agents, 55, Market Street, Manchester.