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Патент USA US3089600

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May 14, 1963
H. H. GRoos
l’ //,
United States Patent Office
Patente, May ,4, „6,
allowed to bear only in part on the internal wall surface
of the reception opening. By this means the introduction
of the shaped pieces is also facilitated. It helps to facili
Horst Hans Groos, Dusseldorf, Germany, assignor to
tate the introduction in particular if the shaped pieces
bear on the wall of the reception opening in the neigh
bourhood of their joints and in their central portion. It
Schloemann Aktiengesellschaft, Dusseldorf, Germany
Filed June 27, 1960, Ser. No. 39,169
Claims priority, application Germany July 11, 1959
5 Claims. (Cl. 207-15)
furthermore serves to keep the container narrow, and to
save material in the manufacture thereof, if it is given
an approximately elliptical cross section, with the minor
A container for a metal tube and extrusion press is 10 axis of the ellipse coinciding with the longitudinal axis
of the cross section of the receiving chamber.
Instead of an elliptical cross section there may be sub
stituted, without disadvantage, the cross section shown
in FIGURES 1 and 2, which is comparatively easy to
in each case interposed 'between adjacent ends of two
known, in the reception opening of which is inserted a
plurality of shaped pieces, Iwhich form a receiving cham
ber for non-circular billets, an intermediate piece being
shaped pieces.
With these containers, moreover, the
Two constructional examples of the invention are dia
intermediate pieces bear on the internal wall surface of
grammatically illustrated in FIGURES l and 2 of the
the container. There is therefore the disadvantage,
accompanying drawings.
amongst others, that extrusion material penetrates into
In both figures the container is denoted by 1. The
the joints -that sometimes occur between a shaped piece
and an intermediate piece, when the billet to be ex 20 outline of its cross section is formed of two arcs of circles
21 and two parallel sides 22, thus yielding a narrow
truded, located in the receiving chamber of the container,
ellipse-like form.
is subjected to pressure. With frequent use of such a
In FIGURE 1, into a non-circular and approximately
container it becomes subject, owing to ever increasing
square or rectangular reception opening of the container
quantities of extrusion material that accumulate in the
joints, to an ever increasing initial stress, which may 25 1, shaped pieces 3 and `4 are inserted. They enclose a
receiving chamber, marked S, for a flat billet. The
finally lead to the bursting of the container.
shaped pieces 3 and 4 are chamfered at 6, on their sides
The present invention obviates this ldisadvantage by
facing the internal wall surface of the container. These
the fact that each intermediate piece bears on the internal
thinnings 6 ydiminish the concentrations of stress especial
surfaces of two adjacent shaped pieces, in which case
30 ly occurring in these regions, and contribute towards the
it overlaps the joint between them.
reduction of the bending moments acting upon the con
The intermediate pieces exhibit under these circum
tainer. Moreover by them the insertion of the shaped
stances an elasticity which is greater (owing for instance
pieces is facilitated, since the latter bear only partially
to differences of cross section) than the elasticity of the
on the internal wall surface of the reception opening 2,
shaped pieces, so that they bear sealingly on the shaped
namely at 23 in the neighbourhood of the joints between
pieces as soon as the billet to be extruded is subjected
the shaped pieces and the intermediate pieces, and at
24, that is, at the central portion of each shaped piece.
In this type of construction the shaped pieces, as in
The shaped pieces 3 and 4 are bevelled on their abut
other known methods of construction, are shrunk into
the container. In order that by this shrinking-in the 40 ting surfaces, and accommodate here two ledge-like pro
jections 7a, having a dovetail-shaped cross section, on
intermediate pieces may also be ñrmly secured, a form
intermediate pieces 7. These intermediate pieces 7, under
of construction appears advantageous in which the inter
the extrusion pressure prevailing in the receiving space,
mediate piece projects with a ledge-like extension of
press against the inner surfaces of the shaped pieces 3
dovetail-shaped cross section into the joint, adapted to
this form of ledge, in the shaped pieces. If however it 45 and 4. If the two shaped pieces 3 and 4 move away
from one another under the action of the extrusion pres
is desired to keep the shrinkage forces away from the
sure, the intermediate pieces 7 always bear tightly against
compartively small intermediate pieces, the construction
the inner surfaces of the shaped pieces, so that no ex
Iwill then be such that the shaped pieces are in direct
trusion material enters the joint between a shaped piece
Contact with one another, and, in the neighbourhood of
the joints, exhibit rounded recesses, in which the inter 50 and an intermediate piece. The intermediate piecesl 7,
owing to their small cross section, can yield more readily
mediate pieces are inserted.
than the shaped pieces 3 and 4. They are shrunk into
In the case of containers with only two shaped pieces
the container along with the shaped pieces.
and two intermediate pieces, which together enclose a
In FIGURE 2 the shaped pieces are constructed simi
flat or shallow receiving chamber, the construction is
made such that the joints of the shaped pieces are located 55 larly to those of IFIGURE 1, and are marked 8 and 9.
They bear directly against one another with abutting
at the end walls of the receiving chamber.
surfaces 10. They are hollowed out, in the region of
The reception opening of the container is preferably
the joint formed by the abutting surfaces 10, on the side
made non-circular, in order «to effect a saving in the
«facing the receiving aperture 11, .and they here accom
breadth of the container. This then yields the possibility
to pressure.
that a container according to the invention can be inter
changed, in a press, with ordinary containers for circular
billets. In order that advantageous bearing surfaces be
tween shaped pieces and the internal wall surface of the
container may be yielded in the case of a non-'circular
reception opening of the container, the shaped pieces are
60 modate resilient intermediate members 12.
These are
made in the manner of metal collars. They bear tightly,
under the action of the extrusion pressure, against the
internal wall surface of the shaped pieces. The shaped
pieces 8 and 9 are shrunk into the container 1.
This invention yields the »following advantages: the
adoption of the shrinking process for the securing of the
and in which each filler piece is provided with an out
shaped pieces; the absolute sealing with the help of the
intermediate pieces; the simple design of the shaped
wardly extending projection disposed between said shaped
pieces and having a dovetail formation `mating with the
dovetail formation on said shaped pieces.
pieces, which have only a -few operative surfaces and
these are easily machinable; the possibility of forming Ul
3. In a container as defined in claim 1, in which said
a ñat receiving chamber with the help of only two shaped
partial side walls are arcuate and in which said filler
pieces; and finally the small breadth of the container,
pieces have an arcuate outer surface engaging said arcu
which admits of being fitted into any convenient extru
sion press, With containers of the constr-uctions hitherto
ate partial side walls.
4. in a container as defined in claim 1, in which said
adopted it was however not possible to give the contain
ers the desired strength, and at the same time such a
reception opening is non-circular in cross-section and in
which portions of the outer surfaces of said shaped
small breadth that they could be interchanged with ordi
pieces are removed to provide spaced outer surfaces en
nary containers for round billets.
I claim:
gaging the inner surface of said reception opening.
5. In a container as defined in claim 4, in which said
1. In a container for receiving a billet in an extrusion
reception opening is substantially rectangular in cross
press, said container including an elongated body having
a reception opening therein, a plurality of shaped pieces
section and in which said spaced outer surfaces are dis
posed adjacent the spaces between said shaped pieces
and substantially midway between said partial side walls.
References Cited in the iile of this patent
disposed in said opening in opposed spaced relationship,
the inner opposed surfaces of said pieces being -formed
with opposed recesses providing top and bottom walls
and partial side Walls defining a billet receiving chamber,
and intermediate separate filler pieces disposed ybetween
said shaped pieces at opposite sides of said chamber,
each filler piece having a portion engaging the spaced
adjacent inner surfaces of said shaped pieces forming a 25
partial side wall to provide a complete side wall for
said chamber and seal the space between said shaped
2. In a container as defined in claim 1, in which the
opposed spaced surfaces of said shaped pieces outwardly
of said chamber are provided with a dovetail formation
Leeper ______________ __ Feb, 28, 1928
Burmeister __________ __ Feb. 2l,
Clark ______________ __ May 19,
Willson ______________ __ Feb. 10,
Pursell ______________ __ Jan. 14,
Swansen ______________ __ Ian. 6,
Albers et al. ________ __ Nov. 15,
Germany ____________ __ Feb. 26, 1959
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