Improvements in the Construction of Dies for Stamping or Pressing to Form Box-like Articles from Metal Plates.
Year: 1889

page_text: Date of Application, 12th Dec., 1889
Complete Specification Left, 12th Aug., 1890-Accepted, 6th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Dies for Stamping or Pressing
to Form Box-like Articles from Metal Plates.
I, SAMSON Fox, of the Leeds Forge, New Wortley, Leeds, in the County of York,
Engineer and Ironmaster, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to the construction of stamping or pressing, dies for
producing box-like articles from hot metal plates, when such articles require to be
formed with one or more bevilled ends or sides.
I make the female die with one or both ends or one or both sides as the case
may be, capable of a sliding movement, as the male die together with the metal
plate under treatment enter the female die pressure in the meantime being applied to
the sliding part or parts so that the metal plate is gripped by the male and female
dies during formation in suchwise as to prevent buckling or overlapping in the sides
or ends of the article being produced.
Dated this 11th day of Decembar 1889
THOMAS EDWIN CRAVEN, Fel. I.P.A.,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Dies for Stamping or Pressing
to Form Box-like Articles from Metal Plates.
I, SAMSON Fox of Leeds Forge, New Wortley Leeds in the County of York,
Engineer and Ironmaster, 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 has reference to the construction of dies for producing by the
stamping or pressing of hot metal plates of suitable form, box-like articles having
one or more ends or sides bevelled, that is to say, at an angle other than a right angle
to the base or bottom.
For this purpose I use in conjunction with a male die of appropriate form a
female die of novel construction as follows. That end or side (or each end or side)
of the die corresponding to the end or side or each end or, side of the box-like, article
intended to be bevelled I make capable of a sliding movement (under the influence
of suitable pressure such as that of a spring whilst the male die is caused to enter
the female die with the metal plate intended to form the desired box-like article between
the two dies; thus during. the operation. of forming the intended article pressure is
applied to the sliding parts in such a manner that the metal plate
during the
formation of the box-like article gripped by the inale and female dies in suchwise
as to prevent buckling or overlapping in the sides or ends of the article being
produced.
The accompanying two sheets of drawings, shew dies made according to my invention
for the production of an article of box-like form having one side at an angle other
than a right angle and the remaining sides at right angles to the base or bottom.
Fig. 1 is a front elevation ;
Fig. 2 is a plan of the female die.
Fig. 3 is a sectional elevation in the line C D of Fig. 2 shewing the positions of the
parts before the operation is commenced.
Fig. 4 is a sectional elevation in the line C. D of Fig. 2 shewing the positions of
the parts after the operation has been completed.

page_text: Fig. 5 is a sectional plan in the line A. B. of Fig. 1.
In all the figures the same reference letters apply to like parts.
The female die b, is made up of sections b', 6', (secured to the table of a hydraulic
press or other suitable machine by bolts c) and sections 62, 62, capable of a sliding
movement within the fixings d, d, d. Suitable springs, such as the spiral springs ff
illustrated, are arranged in connection with the sliding sections 62, 63, of the female
die for the purpose of keeping the bevelled side of the plate that is under
treatment in contact with the face g of the male die during the whole of the pressing
operation.
X
As
A plate of metal such as mild steel, baving been cut roughly to the required size
and then heated to a suitable temperature, is placed upon the female die, 6 as shewn
in Fig. 3, and the said female die together with the plate a is (by means of a
hydraulic press or other suitable machine) caused to approach the male die a.
the operation proceeds and the male die a enters the female die 6 the sections 6² 62
under the influence of the spiral springs f,f force the metal that is next to those
sections up against the face g of the male die a in which position it is retained. The
male die a as it proceeds further into the female die, b causes the sections 62, 6² to
slide back and compress the spiral springs f, f thereby keeping the metal of the
plate close to the side g of the male die a until the pressing operation is complete,
thus preventing buckling or overlapping in the bevelled inclined end or part of the
plate, or in the corners of the article being produced as shown in Figs. 4 and 5.
It will of course be understood that the forms of the parts and other details will
depend upon the nature of the articles to be produced, thus if it be required to produce
an article with more than one side at an angle other than a right angle to its base or
bottom, the corresponding parts or sides of the female die inust be arranged to be
capable of sliding and springs must be applied to them as hereinbefore described.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
--
For the production or formation by the stamping or pressing of heated metal plates
of box-like articles with one or more sides or ends at. an angle other than a right
angle to the base or bottom a female die for use in conjunction with a male die and
constructed with one or more sides or ends adapted to be capable of sliding move
ment in combination with a suitable spring or springs so applied as to cause the said
side or sides or end or ends to press against the required part or parts of a plate under
treatment in the manner hereinabove described with reference to and illustrated in
Figs. 1 to 5 inclusive of the accompanying drawings.
Dated this 12th day of August 1890.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.