Improved Method and Apparatus for Casting Cement Pipes.
Year: 1899

page_text: Date of Application, 11th Sept., 1899-Accepted, 3rd Feb., 1900
COMPLETE SPECIFICATION.
Improved Method and Apparatus for Casting Cement Pipes.
I, CARL JOHAN KIELBERG, of 14, Helmershus, Copenhagen, in the Kingdom of
Denmark, Polytechnic Student, 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 relates to a method and an apparatus for making cement pipes
such as are at present-especially as pipe-drains--extensively used. Each pipe,
either with or without collar, is made quickly and easily by a single casting.
The accompanying drawings show a constructional form of the apparatus, when
adapted for casting pipes with collars.
In the said drawings
Figure 1 is a view of the apparatus seen in front elevation,
Figure 2 is a view of the apparatus seen in plan, and
Figure 3a vertical section through the mould.
The main parts of the apparatus are the mould and the drum b. The
mould consists of two parts, held together by the iron bands c; the cylindrical
portion of each part is made of sheet-iron, while the part of the mould for the
collar is of cast-iron. The cylindrical part is fastened to the collar part by means
of angle-irons and rivets.
The drum is a sheet-iron cylinder closed above and below by wooden heads.
The drum has at its. upper portion a projection d made of angle-iron running
once around the said cylinder or drum, the said projection being horizontal at
its lower portion but being for the remaining portion carried around the drum
in a spiral course.
The mould is placed upon a wooden pallet e with a square bottom that
rests upon a cast iron support f fastened to a foundation by bolts. The wooden
pallet as well as the cast-iron plate have an opening corresponding to the cross-
section of the drum. The opening in the wooden pallet has along the edge a
turned ring g. The drum may be lowered down through this opening into a
cylindrical well or cavity formed below in the foundation and which will receive
the drum until it rests by means of its projection d upon the ring g.
When the mould is placed in position upon the wooden pallet it is locked by
means of the lock which is guided by the lugs k, fastened in position by the
ring-shaped spanner h and is thus prevented from turning; said mould is moreover
guided by a bearing catching around the mould a little higher up, which, however,
is nct shown on the drawings.
The apparatus is used in the following manner:
The mould is placed upon the pallet and fastened; the drum is pressed
fully down until it rests upon the ring g of the pallet. The cement mortar is
then filled into the mould from above, while the drum is turned round and by
its spiral projection works itself up through the mortar. The drum rod is,
at a suitable height, guided in a learing and is turned by a steam-power by any
well-known mechanism; when casting smaller pipes hand-power in connection
with a loose crank-handle may be used the arrangement for turning the drum,
or the upper guiding mechanism is not shown on the drawing.

page_text: While travelling upwards the drum, will compress the mortar, and, when fully
turned up, smooth off the upper end of the pipe by means of the horizontal part
of the projection d.
When the screw-thread is turned quite out of the mould, the drum is drawn up,
the spanner is opened, and the mould with the cement-pipe, is carried away
upon the pallet e to the drying yard. The bottom plate f is, for this purpose, supplied
with four holes or openings 7, so that hold may be taken with the hands below the
pallet when the removal is to take place. In the drying yard the mould is removed
and the cast pipe is left to dry, resting upon the wooden pallet e.
Another pallet is placed upon the bottom plate f, and the casting of a new
pipe may be proceeded with as above described.
Instead of a whole screw-thread there may be used two half ones, that is to
say, one half on each side, which both begin at the same height and end below
in a horizontal lap. When casting large pipes the mortar will more easily be
forced out into the collar because both screw-threads begin at once, and from the
very bottom, to act upon the mortar in two places.
If the pipes are to be cast without collar, the collar of the mould is left out.
When casting large pipes the drum should be slightly conical downwards, thus
causing less friction in the bottom plates.
The casting takes place very rapidly; the pipes are smoother and more homo-
geneously cast and consequently stronger than when cast in the manner hitherto
adopted.
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
1. Apparatus for casting cement-pipes characterized by a drum placed in the
mould, the said drum forming the core of the mould and having on the outside
projections, mainly screw-shaped by which the drum is screwed up during the
casting through the mortar, compressing this and shaping the pipe.
2. In the apparatus described in Claim 1 the arrangement, that the screw-
shaped projections run out horizontally below in order to smooth off the pipe.
3. The manner of proceeding in casting cement-pipes with the apparatus
described in Claims 1 and 2, characterized by the mould being filled with cement-
mortar, while the drum is being turned round and gradually working itself up
through the mortar until the pipe is formed.
Dated this 11th day of September 1899.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.