Improved Method and Machinery for Blowing and Casting Articles of Glass.
Year: 1893

page_text: Date of Application, 28th Feb., 1893
Complete Specification Left, 27th Nov., 1893-Accepted, 17th Feb., 1894
PROVISIONAL SPECIFICATION.
Improved Method and Machinery for Blowing and Casting Articles
of Glass.
I, HERMANN HILDE of Rosswein Saxony in the Empire of Germany, Merchant
do hereby declare the nature of this invention to be as follows:-
This invention is based on the method and means for utilizing compressed air in
the manner hereinafter described in the fabrication of articles of glass whether
hollow or solid and made by distension of blowing or by casting.
Apparatus is used in which a mould is intended to receive a charge of molten
glass and afterwards to be closed and in which compressed air is first admitted
into the mould above the glass so as to drive the latter downward and cause it to
fill the interstices between the mould and its core, if cast glass be desired, or to
occupy the lower part of the mould and so surround the air inlet which is also
provided for supply of compressed air for distension of the glass within the mould,
if blown glass is desired. The mould after the glass is so brought into position
may then be reversed where the glass is to be blown and after a preliminary
blowing the glass in the mould before or after such reversal the mould may be
dismantled and removed and replaced by another mould of the shape of the finished
article the base of this mould being formed by a table lifted by a pedal lever or
otherwise and supporting the remaining pieces of the mould. By this means after
the completion of the blowing the mould may be dismantled and the finished
article will be left upon the table..
The machinery for carrying above processes into effect comprises a framework
carrying a hollow horizontal rotary shaft supporting a mould base to which the
outer finishing mould and the interior preliminary mould, where there are two
such moulds may be suitably secured. The outer mould is open above and being
reversed may serve as the sides of the finishing mould to which the aforesaid
table is the base, or it may be simply a supporting form or part of the preliminary
mould. The inner mould is provided with a closing piece to which a flexible
pipe is connected for supply of compressed air to drive the charge of glass down
towards the shaft. The air channel formed within the hollow shaft is continued
into the base of the mould near the shaft and serves for supply of compressed air
for blowing the glass. The nozzle of the air channel projects suitably into the
mould and is provided with a self closing valve.
Where the glass is to be cast, this arrangement for blowing may be dispensed
with or simply left unutilized.
Dated this 28th dor of Fahmi 1902
COMPLETE SPECIFICATION.
Improved Method and Machinery for Blowing and Casting Articles
of Glass.
I HERMANN HILDE of Rosswein, Saxony, in the Empire of Germany, Merchant
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 is based on the method and means for utilizing compressed air

page_text: in the manner hereinafter described in the fabrication of articles of glass whether
hollow or solid and made by distension through blowing or by casting.
Apparatus is used in which a mould is intended to receive a charge of molten
glass and to be afterwards closed and in which compressed air is first admitted
into the mould above the glass so as to drive the latter downward and cause it to
fill the interstices between the mould and its core, if cast glass be desired, or so
as to cause the said glass to occupy the lower part of the mould and so surround
the air inlet which is also provided for supply of compressed air for distension
of the glass within the mould, if blown glass is desired. The mould after the
glass is so brought into position may then be reversed where the glass is to be
blown and after a preliminary blowing, the glass in the mould before or after
such reversal the mould may be dismantled and removed and replaced by another
mould of the shape of the finished article the base of this mould being formed
by a table lifted by a pedal lever or otherwise and supporting the remaining pieces
of the mould.
By this means after the completion of the blowing the mould may be dismantled
and the finished article will be left upon the table.
The machinery for carrying above processes into effect comprises a framework
carrying a hollow horizontal rotary shaft supporting a mould base to which the
outer finishing mould and the interior preliminary mould, where there are two such
moulds, may be suitably secured. The outer mould is open above and being
reversed may serve as the sides of the finishing mould to which the aforesaid table
is the base, or it may be simply a supporting form or part of the preliminary
mould. The inner mould is provided with a closing piece to which a flexible pipe
is connected for supply of compressed air to drive the charge of glass down
towards the shaft. The air channel formed within the hollow shaft is continued
into the base of the mould near the shaft and serves for supply of compressed air
for blowing the glass. The nozzle of the air channel projects suitably into the
mould and is provided with a self closing valve.
Where the glass is to be cast, this arrangement for blowing may be dispensed
with or simply left unutilized.
The machinery is illustrated in the annexed drawings in which
Fig. 1 is a vertical section through the machine at right angles to the rotary
shaft.
Fig. 2 is a longitudinal section thereof.
Fig. 3 a plan of the mould.
Figs. 4 to 6 show the construction of the air inlet pipe and its valve.
Figs. 7 to 10 show different arrangements in which the casting is made, over a
core or without one by means of compressed air.
In the bearings in the frame A rests the hollow shaft B to which the mould
carrier plate D is connected. The hollow shaft B is capable of being turned in its
bearings and contains a passage way a for supplying compressed air through the
carrier plate and valve nozzle (more particularly illustrated in Figs. 4 to 6) to the
mould.
First compressed air is passed from above to the mould by means of removable
covers 6 so that the molten glass placed in the mould is pressed into the lowest
part of the form by means of the air at the beginning of the process.
The operation illustrated in Figs. 1 to 3 proceeds as follows-
When the cover 6 is taken off the upper part of the open exterior mould Gand
the closed interior mould G' are directed upwards. The molten glass is then
brought into the mould G¹ and after closing the cover b this glass is pressed down
into the lower part of the mould G and G¹ by aid of the compressed air. After
this is done the air pressure upon the cover is cut off and the mould is turned over
into the position shown in the dotted lines. Air is then blown through the
nozzle now uppermost and the glass is now blown in the mould G. The latter
is then removed and the opened end of the mould G is closed by the table b¹ in
order to complete the blowing of the hollow glass body.

page_text: The mould is constructed in pieces in order that it may be easily opened for
taking out the glass article when finished. The table movable vertically by
means of the foot lever H not only serves to cover in the end of the mould used,
but after the article is finished, to support it when the mould is opened and
removed.
However, in the manufacture of certain glass articles it is not absolutely necessary
to use a reversible mould, as also a divisible mould may be employed as shown in
Figs. 7 to 10 on a fixed table in which case the air is only introduced from above
through the mould cover b. The moulds may also be arranged in such a way that
within the same several cavities may be arranged side by side so that more than
one article may be produced at the same time. The different arrangements may
vary according to the different objects to be made without the nature of the
essential features of the invention being altered thereby.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. An improved method and device for manufacturing cast or blown articles of
glass in which compressed air is admitted to the mould to press the molten glass
towards the nozzle part of the mould the said mould or moulds G and G¹ being made
in pieces and placed upon a reversible mould carrier D, while in order to blow the
glass within the mould G and G¹, compressed air is afterwards introduced through
the aforesaid nozzle passage a likewise arranged in the reversible carrying
device B, D, this nozzle being provided with a nose pipe F having an automatically
closing and opening valve & substantially as set forth.
2. In the method and device described by Claim 1 the combination of the
moulds with the reversible mould carrier D in such a manner that on turning the
latter the moulds are also turned after the air inlet bottom of the form b is removed
whereupon the moulds are brought to a position above a vertically movable mould
table 6 the latter serving to effect the closing of the mould during the blowing
substantially as set forth."
3. An improved method of making cast and blown glass articles in which the
glass mass used for making solid glass bodies is placed in a mould placed on a
fixed table and is driven by means of compressed air from above downwardly into
the mould and over a core (if any) therein substantially as shown in Figs. 7 and 9
and as set forth.
AL. 67ALנ.י.מ
AT
1000
R. HADDAN,
Of the Firm of Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, W.C.