Improvements in the Manufacture of Steel, Cast Iron, and other Pipes and Tubes.
Year: 1898

page_text: Date of Application, 24th June, 1898
Complete Specification Left, 18th Mar., 1899-Accepted, 24th June, 1899
Improvements in the Manufacture of Steel, Cast Iron, and other Pipes
and Tubes.
FRED HERBERT, Moseley House, Birtley, near Chester-le-Street, County Durham,
Ironworks Manager, do hereby declare the nature of this invention to be as
follows:
manner.
-
A mandril or die made of any suitable material and of a conical, taper, or other
shape is forced through a core box, (which may be made in several parts) the
internal shape of which core box or core mould, is approximately the shape and size
of the interior form of the pipe or tube to be made. The core box or its equivalent
is supplied with the necessary amount of sand or other material for making the core
and the mandril or die is then forced through the sand contained in the core box,
and the act of forcing the mandril or die through the sand in the core box
compresses the sand against the walls of the core box and thus forms a core,
which when extracted from the core box may be dried or used in any ordinary
The mandril or die may be forced or pulled through the core box & sand
by means of hydraulic pressure, or a crane, or by any other suitable mechanical
contrivance, and may be worked either vertically, horizontally, or at any desired
angle, and the mandril or die may be made so as to expand to get any degree of
hardness in the core, and the tapered, conical, or other shape or portion of the
mandril or die may be either attached to or detached from the main portion of the
ram, or mechanism, working it, and the mandril or die may be caused to screw
itself or be revolved during its passage through the corebox, the object being to
produce a sand or other core (without the use of a core bar) and compressing the
substance of which the core may be composed, by means of a ram, mandril, or die,
acting within the said core box and sand, and compressing the sand against
the walls of the core box as before described. It may be found necessary to use
core rods or other contrivance to strengthen & carry the core, in which case, the core
rods (or the equivalent thereto) would probably be placed in the core box, before
the sand was put in the core box, and the act of forcing the mandril or die
through the box and sand, would compress the sand, around, in, or upon the core
rods, or the equivalent thereto, and they would then be enclosed, or partly enclosed
within the sand of other material of which the core is made.
Dated this 23rd day of June 1898.
FRED HERBERT
Applicant.
35 Improvements in the Manufacture of Steel, Cast Iron, and other Pipes
and Tubes.
FRED HERBERT, Moseley House, Birtley, Chester-le-Street, County Durham,
Ironworks Manager, do hereby declare the nature of this invention and in what
Dice R11

page_text: manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:―
This invention relates to an improved method of making cores & in order to more
fully explain the object of this invention, I have attached hereto a sheet of draw-
ings, and Fig. 1 shows at A, a pipe core box arranged to open on hinges B. This
corebox is shown as if fixed vertically on a base plate C, but it may be fixed or
carried in any other suitable manner. At D is a cone which is arranged so as to
travel the entire length of the core box A, and this cone may be drawn
or forced through the core box by any suitable mechanical contrivance, in this
case it is shown as if attached to an hydraulic ram or guide E, and the object of
drawing or forcing this cone or tapered die through the corebox, is that during the
passage of the cone or its equivalent through the corebox, the sand or other sub-
stance contained within the corebox is compressed against the sides of the corebox
and thus forms a core, which when extracted from the corebox may be dried or
used in any ordinary manner. In some cases it would be necessary to measure the
amount of sand or other substance contained in the corebox before compression, and
this may be accomplished by a rod, or tube, or its equivalent, placed upon or
preceding the cone or conical die as shown at F, and it is evident that the amount
of sand to be compressed can be regulated by having these rods or tubes F, of
varying diameters, and therefore the hardness or density of the compressed core,
can be regulated to suit the work as required. The cone 1) may be made solid with
the main guide or ram E as shown in Fig. 1, or it may be carried on an extension
or lengthening portion of the ram as shown at G in Fig. 2, and this may have a
conical portion attached to or placed upon it as shown at H in Fig. 2 so this cone
would form a continuation of the cone D, and acting in the same manner, still
further compresses an enlarged portion of the core if so required, as shown at I, and
this extension tube, or rod G may be allowed to remain in the core after com-
pression, so as to strengthen the core, or so that the core may be carried by it, as
shown at Fig. 3, or the cone and extended piece, or its equivalent, may be
withdrawn from the core, which can then be lifted by a rod, rope, or chain, passed
through the hole in the core, made by the passage of the cone, or in any other
convenient manner. The cone may be made in one or several pieces, arranged to
expand, and it may be caused to rotate during its passage through the core, by a
rifled guide or other arrangement.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1st. The method of making cores for pipes and tubes, by means of a cone,
cones, or a conical die, forced or drawn through and within a corebox, in such a
manner that the passage of the cone through the corebox, compresses the sand
or other material against the walls of the corebox.
2nd. The use of cones or conical shaped dies, for the compression of sand or
other materials placed within a corebox, and the formation of cores by internal
compression by means of tapered dies, as and for the purpose described.
Doted this 17th day of Mazah 1900
FRED HERBERT,
Applicant.