close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2109078

код для вставки
Feb. 22, 1938. '
w, WASHO
2,109,078.
MEANS FOR CASTING CLAY PIPE
'
Filed Dec. 4, 1935
2 Sheets-Sheet 1
5
e
,ZE
"
\\
24
[)Wezz/or
MY/iam Maia
Feb. 22, 1938.
w. WASHO
2,109,078
‘
‘
' MEANS FOR CASTING CLAY PIEE
Dec. 4, 1955
2/2,M3.796,
‘
2 Sheets-Sheet 2
w
1.
m
I
a
//
1
w
2.
.
v.
I
60
63
80
I
?zzlem‘or
.
'h/i/b'am Wasizo
b
.
131% w. 77m.»
-
2
2,109,078
lustrating the cast pipe supported on its shoulder
at the spigot end.
Fig. 9 illustrates the connection joint of the
two pipes, it being understood that before use
the pipes are kiln dried.
Referring ?rst to the construction of the mold
this, as an assembly, is designated by the numeral
6 | in which there is a lower portion |2 preferably
formed with a cylindrical exterior l3, cylindrical
10 interior surfaces i4 except for the annular ribs
I5, thus they maybe considered as grooved sec
tions I6 between the ribs. The mold is quite thick
on the measurement |'| between the inner and
outer surfaces. The lower portion of the mold
15 has an internal beveled shoulder I 8, and‘ from the
inner corner l9 of the shoulder there is an out
wardly ?ared surface 20 terminating at the ?at
transverse bottom 2| of this lower portion of the
mold. The upper joint surface 22 of the lower por
tion forms a plane surface transverse to its axis,
but it has a series of recesses 23. These recesses
are preferably curved on their inside and outside
surfaces 24 concentric with the axis of the mold.
These surfaces are also preferably tapered down
25 wardly. The ends 25 of each recess are also
tapered downwardly so that the bottom surface
25 is considerably smaller than the opening 2i
at the top of each recess.
The upper removable mold section designated
30 by the assembly numeral 30 is formed of two
similar mold sections 3|. These have a lower
joint surface 32 formed with a plane surface
transverse to the axis‘ of the mold, the outside
surface of the assembled sections is cylindrical,
35 as indicated at 33, forming practically a contin
uation of the cylinder of the lower mold section
l3. The inner surface 34 is also cylindrical ex
cept for the internal ribs 35 leaving annular
grooves 36, thus the interior surface for a por
tion of the upper section is similar to the ribbed
and grooved interior lower section of the mold.
A vertical joint 37 is formed between the two
sections 3| of the upper portion, and this upper
portion terminates in a ?ared upper surface 38.
The mold portion for the socket or collar of
45
the pipe, indicated by the numeral 40, comprises
a lower beveled shoulder 4|, an outwardly an
nular sloping surface 42, an internal shoulder 43
at the top of the surface 42 and the ?ared fun
50 nel surface 44. The uppersections of the mold
are formed with dowels 50, these projecting
downwardly from the lower joint surface 32 and
being shaped to conform to the recess 23 in the
lower mold section, thus the dowels have inner
55 and outer curved surfaces concentric to the axis
of the mold. As the sides and ends thus taper,
they may be readily withdrawn from the recesses
23. At the vertical joints 3'! there are also
complementary dowels 5| engaging in comple
60 mentary recesses 52. These dowels have verti- '
cally tapered surfaces 53 (note Fig. 2) and a ver
tical inner edge 54. The upper and lower edges
as supported on an imperforate board, bench,
table or the like, indicated at 60. The interior
of the mold is ?lled with a clay slurry or slip
indicated at 6|. This slurry is carried above the
shoulder 42 and has its surface level 62 contact
ing the funnel section 44. After the slurry has
been left in the mold a sufficient time for absorp
tion of water adjacent the mold, the mold is
moved so as to center the mold over an ‘opening
63 in the board or table or at the margin of the 1O
board. This allows the liquid slip to ?ow down
wardly through the open lower end of the mold
and the opening 63. This action develops a main
pipe section 65 having a lower spigot end 66 and
collar or socket end 61. The characteristic of 15
the spigot end is that it has a sloping shoulder
68 (note Fig. 9) which has preferably the same
angle as an internal shoulder 69 formed opposite
the outwardly flared surface 10, this latter being
in contact with the surface 4| of the upper sec 20
tion of the mold. The collar has an outward
sloping surface ‘H and an inner surface 12 sub
stantially parallel therewith. An upper beveled
edge 13 is formed by the shoulder 42. The .an
nular grooves 74 are formed by the ribs l5 and 34 25
of the lower and upper mold sections. The ring 7
‘i5 is formed at the top by the sloping funnel 44
and this ring is cut away by means of a trim
ming knife 16 (note Fig. 7). This knife is guided
around the upper part of the mold on the funnel 30
surface 154 and forms a cut 11 in alignment with
the funnel 44. The knife is then brought into
more or less alignment with the inner surface 12
of the socket of the collar and forms the cut 18.
This removes the remaining somewhat triangular 35
section '79 of the ring Tl. At the bottom the
trimming knife is guided on the beveled surface
20 to remove the lower ring 80, forming a cut
on the line 8|, removing the lower portion of the
ring. The knife is brought into alignment with
the interior surface 82 of the pipe, forming a cut
on the line 82 and thus removing a portion of
the ring of a triangular cross-section, as indi
cated at 83. This leaves the lower part of the
pipe, that is the spigot end, of the shape shown 45
in Figs. 7 and 8, in which the shoulder 68 of the
pipe rests on the shoulder l8 at the bottom of
the mold.
When the clay pipe is su?icientlystiffened, the
upper mold sections 30 are then removed, leav 50
ing the upper part of the pipe with the collar
and socket projecting above the lower mold sec
tion l2. The pipe then shrinks a sufficient
amount in its diameter on partial drying, so that >
it may be lifted out of the mold. The spigot end 55
of one pipe then is of the proper shape to inter
?t with the collar and socket end of an adjacent
pipe, as shown in Fig. 9. Preferably a cement
bonding 85 is used between the complementary
shoulders 69 on the socket and 68 on the spigot 60
and the marginal ?lling of cement 86 ?lls the
space between the inside surface 12 of the collar
55 are also tapered. The dowels and recesses . and the lower portion of the spigot on its ex
are complementary, that is, one of the sections ternal surface. It will be understood, of course,
65 3| has a dowel on one side and a recess at the
before the pipes are assembled that they have
other. This is preferable to having both re
been kiln dried in the usual manner. This type
cesses on the same mold'section and both verti
of casting produces a pipe which on its outside
cal dowels on the opposite mold section. It will surface has the characteristic of the multiplicity '4
thus be seen on account of the tapers of the
dowel, the upper sections of the mold may read
ily be removed from the lower section and sep
arated from each other.
>
The procedure for casting pipe using my mold
above mentioned is illustrated particularly in
75.. .Figs. 5, 6 and 7. In Fig. 5 the mold is illustrated
of annular grooves and on its inside it may not
be a true cylinder from end tov end of the por
tions in the cylindrical part of the mold, but this
inside surface is suf?-ciently true as to its di
ameter and the interior surface for most pur
poses.
An important feature in the construction of the 75
2,109,078
mold and the method is in the ribs on the inte
rior of the mold for when the portion of the clay
slip in contact with the mold begins to solidify
by absorption of the water into the mold there
would be developed a longitudinal shrinkage if
the mold had a cylindrical inside surface. The
ribs, however, distribute this shrinkage so that
the entire weight of the solidi?ed portion of the
slip is not borne by the lower shoulders ‘Ill of the
10 collar portion of the mold, but each rib sup
ports a certain proportion of the weight of the
solidifying slip. After this slip has solidi?ed to
the desired extent to develop a proper thickness
for the pipe, the surplus interior portion of the
slip is allowed to run out through the lower por
tion of the mold. An additional shrinkage then
develops sufficiently to allow removal of the up
per section of the mold, then while the pipe is
still supported in the lower part of the mold, the
20 ribs operate to carry the proportion of the weight
until the slip is dry enough and until it has
shrunk in diameter in the form of a pipe so
that the pipe may be lifted upwardly clear of
the ribs. Manifestly, the ribs do not need to be
N) til of large dimensions, but should be quite small
compared with the diameter of the pipe to be
formed.
The sequence of operations, after removal of
the collar or upper portion of the mold, this being
30 done at or adjacent the casting table, is for a
workman to take the lower portion of the mold
with the green pipe therein to a drying room,
which may be somewhat in the nature of a dry
ing oven if desired. The pipe, while in the mold,
is subjected to a sufficient temperature for a suit
able length of time to both dry the lower portion
of the mold and cause a further drying and
shrinkage of the pipe. The workman then re
moves the mold with its partly dried pipe to an—
40 other portion of the drying room, or oven, removes
the pipe from the mold and leaves the pipe in
the drying room for more complete drying, he
takes the lower portion of the mold then to the
casting table for another casting operation, the
mold being su?iciently dried for this purpose.
After the pipes have been su?iciently dried in the
drying room or drying oven they are burnt in the
kiln in the usual manner to secure a su?icient
hardness and texture of the pipe. It will be un
derstood that if desired vitri?ed pipe may be made
by the same process, altho it may be necessary
to use a different composition in the slip from
that of the softer pipes.
As a rule, the upper portion of the mold does
not require to be placed in a drying room, espe
cially when casting in summer weather, as this
portion of the mold is removed from the pipe
and the sections separated, exposing a large sur
face to the air for drying. However, if atmos
60 pheric conditions are such that the upper portion
of the mold does not dry su?lciently quickly to
carry on a casting operation at the desired speed,
the upper portions of the mold may also be placed
in a drying room.
Various changes may be made in the principles
of my invention without departing from the spirit
thereof as de?ned by the appended claims.
I claim:
1.-'In a device for casting clay pipe, a lower
70 tubular mold formed integral having a lower in
3
ternal shoulder sloping inwardly and downwardly
and a lower outward ?are below the shoulder to
the bottom of the lower portion of the mold, an
upper mold section having a transverse joint with
the lower mold connected by inter?tting recesses
and dowels, the upper mold having a plurality of
vertical joints with interconnecting recesses and
dowels, the upper mold having a collar forming
enlargement with a lower shoulder sloping out
wardly and upwardly, an annular surface there 10
above having an outward slope, an upper shoulder
sloping upwardly and inwardly and having a
funnel surface sloping upwardly and outwardly
from the inner edge of the second shoulder, the
upper and lower molds being relatively thick 15
compared to their internal diameter and formed
of a water absorbent material, the upper funnel
surface being adapted to operate as a guide for
a clay trimming tool at the top of the mold and
the lower flared surface being adapted to act as 20
a guide for a trimming tool at the lower part of
the mold.
2. In a device for casting clay pipe, a lower
tubular mold formed integral having a lower in
ternal shoulder sloping inwardly and downwardly 25
and a lower outward ?are below the shoulder to
the bottom of the lower portion of the mold, an
upper mold section having a transverse joint with
the lower mold and having a plurality of vertical
joints, the upper mold having a collar forming 30
enlargement and a funnel sloping upwardly and
outwardly from the upper part of the collar form
ing enlargement, the upper and lower molds being
relatively thick compared to their internal diam
eter and formed of a water absorbent material, 35
the upper funnel surface being adapted to oper
ate as a guide for a clay trimming tool and the
lower ?ared surface being adapted to act as a
guide for a trimming tool at the lower part of
40
the mold.
3. In a device for casting clay pipe, a lower
tubular mold formed integral and having a lower
internal shoulder sloping inwardly and down
wardly and having a lower outward ?are below
the shoulder to the bottom of the lower portion 45
of the mold, an upper sectional mold having a
collar forming enlargement and removable in
sections from the lower mold, the upper and lower
molds being relatively thick compared to their
internal diameter and formed of a water absorb
50
ent material, the lower ?ared surface being adapt
ed to act as a guide for a trimming tool at the
lower part of the mold.
4. In a device for casting clay, a lower tubular
mold formed integral and having a lower internal 55
shoulder, an upper mold section having a trans
verse joint with the lower mold and a plurality of
vertical joints, the upper mold having a collar
forming enlargement characterized by a lower
shoulder, an annular surface thereabove and an
upper shoulder extending inwardly and having a
funnel surface sloping upwardly and outwardly
from the inner edge of the upper shoulder, the
upper and lower molds being relatively thick com
pared to their internal diameter and formed of 65
a water absorbent material, the upper funnel sur
face being adapted to operate as a guide for a clay
trimming tool at the top of the mold.
WILLIAM WASHO.
70
Документ
Категория
Без категории
Просмотров
0
Размер файла
662 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа