Improvements in Apparatus for Making Moulds and Cores for Casting.
Year: 1895

page_text: Date of Application, 9th May, 1895
Complete Specification Left, 8th Feb., 1896-Accepted, 14th Mar., 1896
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Making Moulds and Cores for
Casting.
We, WILLIAM DRENNAN, of 29, Rosendale Road, Pollokshaws, in the County
of Renfrew, North Britain, Ironfounder, and JouN DICK, Junior, of Clifton Hill
Foundry, Coatbridge, in the County of Lanark, North Butain, Ironfounder, do
hereby declare the nature of this invention to be as follows, that is to say .-
--
This invention consists in constructing and combining in an improved manner a
cential or axial piece and circumferential segments and other parts for shaping
certain forms in moulds, and for being used as collapsible core bars.
Each
In apparatus made according to one modification of the invention there are four
segments, which when in their outermost positions, with natiow intermediate or
filling-up strips between them, present an external cylindrical surface.
segment is made with a radial flange or rib on its inner side, the inner edge of the
rib being clued at a small augle from a longitudinal line, and being shaped with
a square cross section diagonally disposed to the b. The central or axial piece
is made with four radial langes forming a closs in section, and in each of the
four cone-like spaces between the radial flanges guides or guide strips are
formed or fixed on the flanges, to receive between them the inner square edges of
the segment ribs, these guides having the saine inclination as the uner edges of the
segment ribs. With this construction a relative longitudinal movement between
the segments and the central piece will cause the segments to move outwards or
nwards whilst remaining parallel
The outer edges of the radial flanges of the central piece are inclined with a
gienter inclination than that of the inner edges of the segment ribs, and the edges
are inade with bevilled sides forming a square extreme edge. The intermediate
strips are made with radial ribs on then inner sides, and the inner edges of these ribs
are inclmed at the same angle as the edges of the radial flanges of the central
In consequence
ece, and are shaped to fit and slide on the edges of the latter.
of the greater inclination of the edges of the radial flanges, the intermediate strips
are moved more quickly inwards or outwards than the segments by relative
longitudinal movements between the segments and the central piece. With this
arrangement whilst the intermediate strips fit closely between the edges of the
segments when in their outermost positions, they become withdrawn inwards when
the parts collapse, with sufficiently greater speed to allow the edges of the segments
to approach each other as they have to do in moving inwards.
The segments are suitably held or couhned at the ends by means of disks or
plates, and the central piece has formed on or fixed to it end spindles to which the
longitudinal movements for expanding of collapsing may be applied by screwing
mechanism or in any other convenient way.
When the length of an article relatively to its diameter is not small it will in
general be necessary to make the sets of inclined parts in two or more separate
steps.
Instead of there being four segments there may be three, or more than four; it
will however generally be most convement to make the apparatus with four segments.
The segments and intermediate strips may be shaped so as to combine to form
complete shapes differing more or less from a cylindrical shape.
In using thic apparatus the sand or inould material may be filled into the mould

page_text: box or core box with the segments in their collapsed state; and the segments may
be subsequently forced outwards so as to compress the sand or mould material
Dated thus Eighth day of May 1895.
EDMUND HUNT,
Applicants' Agent,
Improvements in Apparatus for Making Moulds and Cores for
Casting.
We, WILLIAM DRENNAN, of 29, Rosendale Road, Pollokshaws, in the County
of Renfrew, North Britain, lionfounder, and JOHN DICK, Junior, of Clifton Hill
Foundry, Coatbridge, in the County of Lanark, North Britain, Ironfounder, 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, that is to say.
--
This invention consists in constructing and combing in an improved manuer
a central or axial piece and circumferential segments and other parts for shaping
certam forms in moulds, and for being used as collapsible core bais.
In apparatus made according to the invention there are segments, which when in
their outer most positions with narrow, intermediate, or filling-up strips between
them present an external cylindrical or other sui face. The segments and filling
up strips are made with internal radial flanges or bs the edges of which are
inclined at an angle from a longitudinal line and are acted upon (in a manner to
expand or collapse the segments and strips) by counterpart flanges or riba on a
central piece acinated by hydraulic or other mechanism Duplicates or approximate
duplicates of the apparatus hereinbefore described are fixed together in a suitable
manner for making long articles. Mould material is filled into the mould box or
core box with the segments and strips collapsed, and the segments and strips are
subsequently forced outwards so as to compress the mould material, and are made
10 again collapse for the purpose of being withdrawn.
And in order that the said invention and the manner of performing the same
may be properly understood we hereunto append a sheet of explanatory drawings,
to be hereinafter referred, and showing the improved apparatus for making moulds
and cores for casting.
Figure, 1, of the drawings is an elevation of the improved apparatus as used as
the pattern.
Figures, 2, and 3, are respectively a vertical section and a plan of the apparatus
as applied in the mould box.
Figures, 4, and 5, are horizontal sections of the apparatus, as taken respectively
at the dotted lines, A B, and C D, 10 Figure, 2, the mould box being shown in
Figure, 5, only.
Figuro, 6, is a horizontal section of the apparatus with the segments collapsed
and as taken at the line A B.
In these drawings the same reference letters are used to mark the same or like
parts wherever they are repeated.
In apparatus made according to one modification of the invention there are
four segments, A, which when in then outer most positions, with narrow, inter-
mediate, or filling-up strips, B, between them, present an external cylindrical
surface. Each segment, A, is made with a radial flange or b, C, on its inner
side, the inner edge of the rib being inclined at a small angle from a longitudinal
line, and being shaped with a square cross section diagonally disposed to the rib.
The central or axial piece, D, is inade with four radial flanges, E, forming a cross
in section; and in each of the four coruer-like spaces between the radial flanges, E,
guides or guide strips, G, are formed or fixed on the flanges to receive between
T

page_text: them the inner square edges of the segment ibs, C, these guides having the Fame
inclination as the inner edges of the segment iibs. With thus construction a
relative longitudinal movement between the segments, A, and the central piece, D,
will cause the segments to move outwards on inwards whilst remaining parallel.
The outer edges of the radial flanges, E, of the central piece, D, are inclined
with a greater inclination than that of the inner edges of the segment ibs, C, and
the edges are made with bevilled sides forming a square extreme edge. The
intermediate strips, B, are made with radial ribs, J, on their inner sides, and the
inuer edges of these ribs are inclined at the same nugle as the edges of the radial
flanges, E, of the ceutral piece, D, and are shaped to fit and slide on the edges of
the latter In consequence of the greater mclmation of the edges of the indial
Hanges, E, the intermediate strips, B, are moved more quickly inwards or outwards
than the segments, A, by relative longitudinal movements between the segments
and the central piece, D. With this arrangement whilst the intermediate
strips, B, fit closely between the edges of the segments, A, when in then outer most
positions, they become withdrawn inwards when the parts collapse, with sufficiently
greater speed to allow the edges of the segments to approach each other, as they
have to, in moving inwards.
The segments, A, are suitably held on confined at the ends by means of disks or
plates, K; and the central piece, D, hins formed on or fixed to it an end spindle, L,
to which the longitudinal movements for expanding or collapsing are applied by
hydraulic pressure of it might be by screwing mecham-m or in any other convenient
way.
When the length of an article relatively to its diameter is not small it will in
general be necessary to make the sets of inclined parts in two or more separate
steps The corresponding parts of these steps or sections are hxed together by
bolts, each segment, A, and intermediate stap, B, being bolted respectively to the
segments or strips longitudinally in line with it, and the sections of the central
piece, D, being also bolted together.
When the apparatus is used to make cores for articles which are comparatively
small in diameter the joints of the segments, A, and the joints of the intermediate
strips, B, of the separate steps on sections are more conveniently arranged to be at
vertically different points of the apparatus.
Instead of there being four segments, A, there may be three or more than four ;
it will however generally be most convenient to make the apparatus with four
segments. The segments, A, and intermediate strips, B, may be shaped so as to
combine to form complete slapes differing more or less fiom a cylindrical shape.
In using the apparatus the sand or mould material is filled into the mould box, M,
or core box with the segments, A, and strips, B, in their collapsed state; and the
segments and strips are subsequently forced outwards so as to compress the sand or
mould material.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim 18.
1. The construction, arrangement, and combination of parts constituting the
apparatus for making moulds and coies for casting substantially as hereinbefore
described.
2. Apparatus for making moulds and cores for casting comprising segments
and filling-up strips made with indial flanges or ribs with inclined edges which are
acted on, in a manner to expand or collapse the segments and strips, by counterpart
Hanges or bs on a central piece actuated by hydraulic or other mechanism,
substantially as hereinbefore descubed.
Dated this Seventh day of February 1896.
EDMUND HUNT,
Applicants' Agent.