Improvements in or relating to Moulding or Corrugating Sheet Iron or other Material, and in the Machinery or Appliances employed therefor.
Year: 1891

page_text: Date of Application, 9th July, 1891
Complete Specification Left, 6th Apr., 1892--Accepted, 7th May, 1892
PROVISIONAL SPECIFICATION.
Improvements in or relating to Moulding or Corrugating Sheet Iron
or other Material, and in the Machinery or Appliances employed
therefor.
We, JOHN PARRY, of 6, Cleveland Street, and HEAD, WRIGHTSON AND
COMPANY, LIMITED, both of South Stockton-on-Tees, in the County of York,
Engineers, do hereby declare the nature of this invention to be as follows:-
This invention relates to moulding or corrugating sheet iron or such other
materials as are similarly moulded or corrugated by pressure between dies; and to
the action and construction of the machinery or appliances by which the operation
of moulding or corrugating is effected.
In describing the nature of our invention we will refer to the operation of
corrugating iron plates from which it will be readily understood how our improve-
ments are generally applicable to moulding and corrugating by the use of dies
pressed together.
In corrugating metal plates it is found in practice that the material is subjected
to severe and injurious strains in accomodating itself to the pressure of the dies;
and that the pressure required to operate the dies is correspondingly great and that
this is due to the absence of proper facilities to enable the material to accomodate
itself to the required change of form under the pressure of the dies; that is to say,
that the pressure is so applied to several dies simultaneously that the plate as a
whole can afford no relief to the strains set up in forming any particular corrugation,
each corrugation being formed out of the material which from the flat state is
pressed into shape between two corresponding dies. A further defect. in corrugating
machinery as at present constructed is that the dies are liable to reach a tem-
perature at which they lose their true form nader the pressure to which they are
subjected.
The principal object of our invention is to improve the action and construction of
the corrugating machinery so that by forming the corrugations consecutively in the
manner hereinafter described the material can accomodate itself more readily to
the required change of shape without setting up the severe and injurious strains
hitherto unavoidable, thus effecting the operation with less power.
A further object of our invention is to provide means to prevent the dies from
reaching a temperature at which they would be liable to lose their true form under
the pressure required to actuate them.
In carrying our invention into effect we construct a machine the frame of which
may be of any suitable design consistent with the requisite strength and structural
compactness to enable motive power to be transmitted to the several dies comprised
in the operating mechanism of the machine in question. The particular construction
and action of these dies is the essential feature of our invention and although any
efficient motive power may be employed to actuate them we will for convenience of
description refer to motive power as derived from hydraulic rams, each separate die
being independently actuated by its own hydraulic rams with the exception of one
die which is fixed in position. The plate to be corrugated is securely retained in
position by wedges or other suitable means provided say in the frame of the
machine.
A half corrugation is formed by the corresponding die on the opposite side of the
plate, which may be termed the first motion die, pressing the plate against the fixed
die; the first motion die. is then retained in position as a fixture whilst the
corrugation is completed by the corresponding die on the opposite side of the plate,

page_text: which may be termed the second motion die which presses the plate against the
first motion die, the second motion die is then similarly retained in position as a
fixture, whilst another half corrugation is formed by similarly actuating a third
motion die and the corrugation again completed by Betuating a fourth motion die,
and so on for whatever number of corrugations the machine is designed to form as
one continuous operation.
In order to prevent the dies from over heating, we furnish them with suitable
means for circulating water through those parts. most exposed to the effects of the
heat involved in the process of moulding or corrugating.
كيم
G. J. CLARKSON,
Stockton-on-Tees, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements. in or relating to Moulding or Corrugating Sheet Iron
or other Material, and in the Machinery or Appliances employed
therefor,
We, JOHN PARRY, of 6, Cleveland Street, and HEAD, WRIGHTSON & Co.,
LIMITED, both of South Stockton-on-Tees, in the County of York, Engineers, 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 relates to moulding or corrugating sheet iron or such other
materials as are similarly moulded or corrugated by pressure between dies; and to
the action and construction of the machinery or appliances by which the operation
of moulding or corrugating is effected.
In describing our invention we will refer to the operating of corrugating iron
plates from which it will be readily understood how our improvements are
generally applicable to moulding and corrugating by the use of dies pressed
together.
In corrugating metal plates it is found in practice that the material is subjected
to severe and injurious strains in accomodating itself to the pressure. of the dies
and in some cases is strained to destruction and that the pressure required to
operate the dies is correspondingly great. These defects are due to the absence of
proper facilities to enable the material to accomodate itself to the required change
of form under the pressure of the dies, that is to say that the pressure is so applied
to several dies simultaneously that the plate as a whole can afford no relief to the
strains set up in forming any particular corrugation, each corrugation being formed!
out of the material which from the flat state is pressed into shape between two
corresponding dies.
A further defect in corrugating machinery as at present constructed is that the
dies are liable to reach a temperature at which they loose their true form under the
pressure to which they are subjected.
The principal object of our invention is to improve the action and construction of
the corrugating machinery so that by forming the corrugations consecutively in the
manner hereinafter described the material can accomodate itself more readily to
the required change of shape without setting up the severe and injurious strains
hitherto unavoidable thus effecting the operation with less power.
A further object of our invention is to provide means to prevent the dies from
reaching a temperature at which they would be liable to loose their true form under
the pressure required to actuate them.
And in order that our invention may be clearly understood and readily carried
into effect, we will now proceed to desoribe the same with reference to the accom-
panying drawings in which the same letters of reference indicate the same parts in
all the figures.

page_text: Figure 1 illustrates a side elevation and Figure 2 an end elevation of a machine
constructed for the purpose of corrugating plates according to our invention.
Figures 3 and 4 are sectional plan views taken on lines XX and Z Z respectively
of Figure 1, and
Figure 5, is an enlarged view showing the position of the dies in dotted lines
when ready for use and in full lines when closed together with a corrugated plate
between them.
The frame of the machine may be of any suitable design consistent with the
requisite strength and structural compactness to enable sufficient motive power to
be transmitted to the several dies comprised in the operating mechanism of the
machine in question. a' a' a' are the upper dies and the corresponding lower
dies of the machine shown in the drawings. The particular construction and action
of these dies is the essential feature of our invention and although any efficient
motive power may be employed to actuate them we will for convenience of
description refer to motive power as applied through hydraulic rams, each die being
separately actuated by its own hydraulic rams with the exception of one die c
which is fixed in position as hereinafter described. It will be found in. practice
that hydraulic pressure is a convenient motive power for actuating the dies which
are required to exert and sustain great pressure in combination with a short stroke
and slow motion.
The plate to be corrugated is secured along one edge by any auitable means as
for instance by being jammed between a fixed die c' and a moveable bar o² separately
actuated by hydraulic rams like the dies a¹ a &c. or for the bar may be
substituted the lever which is wedged tight onto the plate to be corrugated by
driving in wedges at c. The grip on the plate may also be increased by roughing
the surface of the bar or lever c³ with grooves or serrations. Figures 3 and 4
show a suitable arrangement of hydraulic cylinders for working the dies, with two
cylinders for each dic, these cylinders aro secured to the frame of the machine, and
the rams to the dies. The arrangement as shown is as follows :-
Die a is worked from cylinders d', die a' from cylinders d², and die a³ from
cylinders ; where the bar is used, this is worked from cylinders d'. Similarly
die b¹ is worked from cylinders e', die 6 from cylinders e³, and die 6 from
cylinders e³.
When corrugating a plate the action of the machine is as follows:-The edge of
the plate being placed on the fixed die c', the bar is then forced down so as to
secure the plate in position; the first motion die a' is then forced down and forms a
half corrugation in the plate by pressing it against the die c', the first motion die a¹
is then retained in position as a fixture in contact with the plate whilst the
corrugation is completed by the corresponding second motion die 6 which is forced
up against the opposite side of the plate and presses it into form against the first
motion die a', the second motion die b' is then similarly retained in position as a
fixture in contact with the plate whilst another half corrugation is formed by
forcing down the third motion die a' and completed by forcing up the fourth motion
die b³, and so on as a continuous operation for whatever number of corrugations are
required or up to the limits for which the machine is designed.
As soon as the pressure is withdrawn from the rams, the upper dies a¹, a²,
automatically return to their original positions by the resilience of the springs f¹³f
acting upon the sustaining rods g', g³, 9, and where the bar e' is used this is similarly
lifted back by a spring acting upon the sustaining rod 9ʻ.
To avoid confusion in the drawings the means for charging and exhausting the
hydraulic cylinders in the manner required for the purposes of our invention are
omitted and will not require description as a suitable arrangement of pipes, cocks
and levers for effecting this object in the manner required for effecting the purposes
of our invention can be readily devised without resorting to any novel or special
construction other than may be required for a particular design of the machine or
to suit the position or other circumstances under which the machine has to work.
Ah are pipes leading from the tank to the several dies to maintain a constant

page_text: circulation of water through the dies when in use and to prevent them from over-
heating and then loosing their true form.
It is found in practice that the temperature to which the water is raised in flowing
through dies of moderate length will maintain a sufficient circulation to effect this
purpose, otherwise the requisite circulation may be maintained under any convenient
pressure available.
It will be understood that cach die has its own delivery and return pipes h h
communicating with the tank j, so that the water circulates through each die
independently of the others.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we would have it understood
that wo do not confine ourselves to the particular arrangement of parts shown which
can be obviously modified in detail and we declare that what we claim is:
Firstly In moulding and corrugating sheet iron or the like, the use of con-
secutively actuated moulds or dies between which the material is pressed into
shape from bend to bend substantially as hereinbefore described and illustrated by
way of example in the accompanying drawings.
:-
Secondly In machinery for moulding or corrugating sheet iron or the like the
use with or without the circulation of water to keep them cool, of consecutively
actuated moulds or dies constructed and operating substantially as described and
with reference to the accompanying drawings.
Thirdly: The improved combination of parts as a whole, constructed, arranged
and fitted together for moulding and corrugating sheet iron or the like, substantially
as hereinbefore described and illustrated.
D1
11000
G. J. CLARKSON,
Stockton-on-Tees, Agent for the Applicants.