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Патент USA US3026593

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March 27, 1962
Filed Sept. 29, 1959
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nited States
Patented Mar. 27, 1962
Arthur Victor Bugler, New Malden, England, assignor to
Water to the tubes 16 is supplied through an inlet port
Linotype and Machinery Limited, London, England, a
company of Great Britain
Filed Sept. 29, 1959, Ser. No. 843,241
8 Claims. (Cl. 22-4)
This invention relates to machines for casting curved
stereotype plates used in printing.
It is concerned with that type of machine in which the
plate is cast trom a matrix in a mould having a curved
core and an ‘arched back. Both the core and the back
20 in a manifold 21 bolted to the bottom of the core.
Along each tube is made a series of saw cuts 27 extending
transversely through the wall of the tube at an angle of
about 30° to the axis of the tube in upward direction,
i.e. in the direction of the water tube. The slots serve
as jet ori?ces for throwing sprays of cooling Water under
pressure against the outer wall 17 of the core.
As each
slot extends circumferentially round the tube, a ?ared jet
is produced, which spreads laterally over the wall.
In the modi?cation shown in ‘FIG. 5 pairs of jet holes
22 are arranged to spray'water obliquely against the core
wall 17 in radial directions to both sides of each tube.
are jacketted for the ?ow therethrough of: cooling water.
A third radial jet hole 23 is provided between each such
The object of the invention is to provide in such a ma 15 pair of jet holes 22 for jetting cooling water in a direction
chine improved means for cooling the core so as to reduce
the time for cooling the casting and thereby improve the
production rate of the machine.
In the machine according to the present invention the
core jacket houses means for spraying water to cool the
Preferably the arrangement is such that water sprays
are directed against or at least towards the curved part
normal to the wall.
To provide even cooling, the arrangement of tubes and
slots or jet holes is such ‘as to distribute cooling water as
evenly as possible over the core Wall.
After traversing the core, the cooling water is dis
charged into the top manifold 24 of the core chamber
through a short tube 25 and thence drained away through
a ?exible tube 26.
of the core wall that forms part of the casting chamber.
To increase the cooling rate, a pump may be utilized
The spraying means may consist of water tubes which 25 to augment the pressure of the mains supply so as to
extend through the core chamber and jet the cooling speed up the water flow and thereby the heat abstracted
water against the wall of the core. Thus a series of
by the water.
straight tubes are arranged concentrically within the core
What is claimed is:
jacket and are supplied with cooling water under pressure
l. A machine for casting curved stereotype printing
from a manifold at one end of the core. The other end 30 plates comprising a core with upper and lower ends and
of the core has a water outlet.
having a cooling chamber, the outer wall of which is con
It is preferred to jet the water sprays obliquely for
stituted by that part of the core de?ning the mold cavity
ward, at an angle of say 30°, relatively to the direction
and the inner Wall of which is constituted by a corre
of water ?ow through the tubes, and to arrange the jets , spondingly curved plate substantially coextensive with said
to afford laterally ?ared sprays. The jets may be pro
core part and arranged in close proximity thereto and
duced by transverse saw cuts extending through the walls
which is provided with a ?uid outlet at its upper end and
of the tubes. In a modi?cation the jets consist of holes.
is devoid of outlets except at its upper end, a plurality of
It has been found that the high local velocity of water
spray tubes extending parallel to said outer wall Within
on the cooling surface has a marked effect in reducing the
said chamber, means to conduct a cooling ?iud to the
time for cooling a plate compared with the time entailed 40 lower ends of said tubes, said spray tubes being formed
with the normal method oi bulk water flow through the
to provide a multiplicity of jet ori?ce means having later
ally obliquely directed portions and arranged to discharge
One form of the invention will now be described by
laterally-?ared sprays of cooling ?uid into said chamber
way of example with reference to the accompanying
and against the inner face of said outer wall to ?ll the
drawings showing ‘an arrangement in which the mould is
chamber and to impart a high local velocity to the cool
arranged vertically.
ing fluid in proximity to said outer Wall.
FIG. 1 is a vertical section through the mould core,
2. A machine according to claim 1, wherein the spray
shown in a casting position;
ing tubes are arranged longitudinally of the cooling cham
KFIG. 2 is |a cross-section on the line II—-II of FIG. 1;
ber and from one end to the other.
FIG. 3 is a longitudinal section on a larger scale 50
3. A machine according to claim 1, wherein the spray
through one of the water tubes;
ing tubes are straight and are arranged concentrically
FIG. 4 is an elevation of a portion of a slotted water
within the cooling chamber parallel to the core axis.
tube, also on a larger scale; and
4. A machine according to “claim 1, wherein the jets
FIG. 5 is an elevation of a portion of another form of
55 are arranged to spray the cooling ?uid obliquely forward
water tube With holes instead of slots.
relatively to the direction of ?uid ?ow through the cool
Although not essential to the invention, the mould
back 10 is ?xed in a vertical position, and the mould core
11 is ?tted to a hinge 12 at its lower end, so that it can
ing chamber.
5. A machine according to claim 1, wherein the jet
ori?ce means of each tube are arranged to direct the sprays
be swung from the vertical operative position shown, in
obliquely forward at an angle of about 30° to the longi
which the mould is shut for casting, to a horizontal posi 60 tudinal axis of the tube.
tion for opening the mould, from which position the cast
6. A machine according to claim 1, wherein the jet
plate is removed for any subsequent ?nishing operation.
ori?ce means are afforded by saw cuts extending into the
The core 11 is of arched form and has a jacket 13 af
walls of the tubes.
fording an ercnate water cooling chamber. The bottom
7. A machine according to claim 1, wherein the jet
of the jacket is drilled and tapped to receive ?ve (or other
ori?ce means are afforded by holes formed in the walls of
suitable number of) screwed ferrules 14 with hexagon
the tubes.
heads 15 ?tted with tubes 16 welded at 19 which extend
8. A method of casting curved stereotype printing
upwardly into the core water chamber to near its top.
plates on the outer surface of a laterally-curved wall the
The set of tubes ‘16 is arranged close to and concentrically
with the curved outer wall 17 of the jacket, which forms 70 inner surface of which forms the front wall of a laterally
curved cooling chamber having upper and lower ends,
part of the plate casting chamber .18 in the mould. The
which comprises maintaining said chamber full of a cool
upper end of each tube is closed at 19.
ing liquid con?ned‘ therein except at its upper end, and
imparting to the liquid in proximity‘to said inner surface
a high local velocity by ejecting through the thus-con?ned
cooling liquid ‘and against said inner surface a multi
phclty of upwardly-directed Jets of cooling fluid at least 5
portions of which are ejected toward and directed against
References Cited in the ?le of this patent
Bremner -------------_____________ __
July 30: 1929
Great Britain ________________ __ 1908
said inner surface at angles which are oblique with respect to the lateral contour of said inner surface.
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