Improvements in Molding Presses.
Year: 1898

page_text: Date of Application, 20th Dec., 1898-Accepted, 11th Feb., 1899
COMPLETE SPECIFICATION.
Improvements in Molding Presses.
I, EDWARD HILL CALLAWAY, of Rosebank, in the County of Richmond, State
of New York, United States of America Mechanical Engineer, 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:-
My invention relates to presses for molding blocks or sections provided with
perforations out of clay or other suitable plastic material. My invention is
especially adapted for use in making sections for electrical conduits which are
adapted to be placed end to end and form an insulating covering or conduit for
wires and cables. Certain parts of my invention, however, are capable of being
used in presses for making other forms of blocks, such for example as solid
blocks or bricks having no perforations.
The object of my invention is to provide an apparatus which can be easily
and accurately controlled and operated, which will produce sections of uniform
and accurate size and shape, which will compress the material uniformly at all
parts so as to make the completed article homogeneous and therefore strong and
durable, which will operate with a fair degree of rapidity and in which the
parts are made to move with the least possible friction and the least possible
amount of strain and wear, and which will be economical in the power consumed
and the results accomplished.
My invention is fully shown in the accompanying drawings, in which Figure 1
is a front elevation view; Figure 2 is a vertical longitudinal section of Fig. 1;
Figure 3 is an end view, partly in section, looking from the right in Fig. 1,
the lower part of the press not being shown; Figure 4 is a horizontal section
of the mold or mold box; Figure is a face view of that part of the frame
containing the ball race for the sliding knife; Figure 6 is a vertical section of
an article such as the press is designed to form; Figure 7 is a side view of this
completed conduit section; Figure 8 is a vertical longitudinal section of the
forming die of the feed cylinder; Figure 9 is a vertical cross section on the
line of Fig. 8, looking in the direction of the arrow shown in Fig. 8;
Fig. 10 is an end view of the forming die of the feed cylinder, looking
in a direction opposite to that shown by the arrow in Fig. 8; Figure 11
is a longitudinal partial section on the line y-y of Fig. 8, to show the shape
of the spreading device; Figure 12 is a cross section on the line
of Fig. 11; Figure 13 is a detail view to show the form of stop or rest upon
which the cross head is supported at the bottom end of its stroke. Similar
numbers refer to similar parts in the different figures.
My invention consists first in the combination in such a press of a mold in
which the material is compressed, a cross head above the mold adapted to carry
and support the core rods which form the perforations in the completed article,
core rods carriel by the cross head, a plunger below the cross head which is
provided with perforations through which the core rods pass so as to enable the
lunger to slide up and down on the core rods, and suitable means for moving
the cross head, core rods, and plunger, down toward the mold until the core rods

page_text: are passed through the mold and brought into operative position, and means for
thereafter forcing the plunger still farther down along the rods, so as to com-
press the material around the rods, whereby the core rods are passed through the
material and brought into the proper position before the material is subjected
to the compression which molds it into shape.
My invention also consists in providing means for connecting and disconnecting
the cross head and plunger, so that they can be connected and forced down
together by the means that reciprocates the plunger until the core rods are in
proper place and can then be disconnected and the plunger forced farther down
to do the compression and whereby when the plunger is raised it will carry up
with it the cross head and core rods. In my complete invention this means
consists of a clutching mechanism adapted to automatically clutch the cross head
and the plunger together when the plunger is raised. The special form of
clutching mechanism shown and described herein forms one part of my invention.
My invention also consists in combining with the parts already referred to or
some of them, a second plunger at the other end of the mold, which is also
perforated so as to receive the ends of the core rods when they are forced into
operative position, and suitable means for forcing this second plunger against
the material, whereby the material is compressed at both ends around the rods,
resulting in a more even density of the product and by which the article after
being formed can be readily removed from the mold.
My invention also consists in employing a sliding knife which is adapted to
cut off the material fed into the mold and, after the cutting operation has been
completed, to form one side of the mold, and a piston connected with the knife
and working in a suitable cylinder, and an open pipe or passage way connecting
the end of the knife cylinder with the end of the main working cylinder, whereby
power which is applied to the piston in the main cylinder will at the same time
be exerted upon the piston in the knife cylinder and will operate both, but will
operate the knife piston first by reason of its offering less resistance, as a result
of which the knife will be caused to cut off the material first and then the
material will be compressed by the plunger.
My invention also consists in the combination with the sliding knife, of a ball
race adjacent to the exterior surface of the knife, and friction balls in the said
race upon which the knife rides, as a result of which the friction on the knife
is very much reduced and economy thereby secured. My invention also consists
in the special construction of the ball race and the parts connected therewith.
My invention also consists in the combination with the molding box or molding
chamber and the compression devices, of a feed cylinder into which the clay or
other material is first introduced, and from which the material is forced by suit-
able means into the molding chamber, the feed cylinder being provided with a
forming die at its discharge end adapted to give the desired form to the material
as it is being pressed into the molding chamber and the forming die being pro-
vided with a regulating plate or block which is adjustable and by means of
which the size of the block or piece of material fed into the mold box is regulated
so as to be made to approximate as nearly as possible to the ultimate size and
shape to be given to the completed article, whereby uniformity of compression
and of product are secured. In the completed form of my feed cylinder I employ
a spreading device in the forming die to spread the material in a vertical direc-
tion and also a measuring roller between the forming die and the mold, by means
of which the length of material fed into the mold box can be definitely measured
and regulated.
My invention also consists in certain other features of construction and com-
binations of parts hereinafter described and claimed.
Referring to the drawings, 1 is the frame of the machine, which is made in
any suitable form such as will give sufficient strength to support the different
parts of the machine. This frame I prefer to mount upon a substantial founda-
tion such as is illustrated in the drawings. 2 is the main hydraulic cylinder,

page_text: in which works the piston 3, which operates the molding plunger 4 and the
cross-head 5 which is above the plunger and which is adapted to be connected
with or disconnected from the plunger as hereinafter explained. The piston 3
is connected with the plunger 4 by means of the connecting rods 6, which pass
through suitable stuffing boxes in the bottom head of the cylinder 2. These
connecting rods also pass through perforations in the cross-head 5, so that the
connecting rods may slide in their bearings in the cross-head. The cross-head 5
supports and carries the core rods 7. These core rods are fastened at their
upper ends to the cross-head in any suitable manner, as by being screwed into
the cross-head. The core rods pass through perforations in the plunger 4, so
that the plunger can be moved up and down upon the core rods. In the com-
plete form of my invention the plunger is provided on its lower face with a
die plate 8, which is given such a form that when it is forced against the clay,
the upper end of the completed block will be molded so as to have the desired
rocesses or projections around the ends of its perforations, whereby the blocks
can be more readily joined in laying the conduit. The number of core rods
to be used is regulated according to the number of perforations desired in the
completed article. I prefer to make the core rods pointed at their lower ends,
so that they will readily pass through the material and into the perforations of
the lower plunger. The cross-head and the upper plunger are adapted to move
in guide plates 9 at their ends, made of any suitable form or construction, a
cross section of the cross-head and the plunger is shown in Fig. 3. The lower
corners of the cross-head and the upper corners of the plunger are preferably
beveled so as to form spaces 10, so that if any of the clay is forced through
the perforations in the plunger between the walls of those perforations and the
core rods, a space for this overflow will be provided when the cross-head and
plunger are brought together.
A clutching mechanism is provided for connecting and disconnecting the
cross-head and the plunger. This is fully shown in Fig. 3. This mechanism
is constructed as follows: 11, 11 are lugs which project from both sides of the
cross-head and are provided with perforations in which the pin 12 is supported.
13, 13 are pawls pivoted so as to turn on the pin 12 and these pawls are
connected with levers 14, 14, provided with the weights 15 at their outer ends.
The levers 14 are connected by means of links 16 and a piston rod 17 with a
piston 18, working in a small hydraulic cylinder 19. The plunger is provided
with grooves 20, with which the ends of the pawls are adapted to engage. 21 is
a grooved rest or support adapted to receive the pin 12 when the cross-head
and plunger are forced down and to act as a stop to prevent the pin from being
forced down any farther and to hold the cross-head while the plunger is being
forced farther down so as to compress the material in the cylinder. The weights 15
depressing the outer ends of the lever 14 tend to bold the pawls normally in
engagement with the grooves of the plunger, so as to hold the plunger and
cross-head together. When the plunger is forced down the cross-head moves
down with it and as the pistons 18 are free to move down in their respective
cylinders they move down at the same time with the cross-head and plunger,
as a result of which the pawls are kept in engagement with the plunger. When
the pins 12 have reached the stops 21, the power is shut off from the main
hydraulic cylinder and power is introduced into the cylinders 19 underneath
the piston 18, so as to raise those pistons and thereby withdraw the pawls fropy
the grooves 20, thereby unlocking the plunger from the cross-head. The power
is again applied in the main cylinder and the plunger is forced down into the
molding chamber to compress the material, the cross-head meanwhile being sup-
ported on the rest 21. When the plunger is raised it carries up with it the
cross-head, and as the cross-head is raised the pawls are automatically engaged
with the grooves, since the weights 15 will keep the outer ends of the levers t
from moving upward until the teeth of the pawls have been pressed in against
the plunger, after which the pistons 18 are moved up in the cylinders 19, the

page_text: whole clutching mechanism rising with the cross-head and plunger. 22, 22 are
the fixed or stationary sides of the mold, which are held in place by the frame
pieces, as clearly shown in Fig. 4. The frame pieces are preferably bolted
together, as shown in Fig. 4. 23 is a sliding knife, which is reciprocated up
and down in guides in the frame of the machine, as shown in Fig. 4. This
knife is provided with a cutting edge at the lower end and is connected at the
upper end by means of the cross-head 24 with the piston rod 25 connected with
the piston 26 in the knife operating cylinder 27. The knife is operated by
applying power to the piston 26. 28 is a race-way formed in the frame pieces 29,
which is filled with friction balls 30, which are free to move in either direction
in the race-way. These balls are held in the race-way by the clamping plate 31,
which is screwed or otherwise suitably fastened to the frame piece 29, and which
is provided at its inner end with an inwardly extending lip 32, adapted to overlap
the friction balls and so prevent them from falling out of the race-way in a side-
wise direction. The friction balls 30 project out from beyond the edge of the
plate 31, so that the knife rides upon these friction balls and does not bear
against the plate 31. By this means the friction upon the knife is materially
reduced and the operation of the knife is very much facilitated. A partial
horizontal section of the race-way and knife, showing the friction balls bearing
against the knife, is seen in Fig. 4, and a front view of the raceway is
shown in Fig. 5. 33 is a connecting pipe connecting the upper ends
of the main hydraulic cylinder and the knife operating cylinder above
the pistons. 34 is the inlet or supply pipe at the upper end of the main
hydraulic cylinder. It will be apparent that when power is applied above the
main piston 3 this power will be exerted at the same time on top of the piston 26,
and as there is less resistance against the piston 26 and its connected knife,
the knife will be first driven down and made to cut off the material before the
plunger is made to do its work of compression, so that the material is cut
off before the plunger begins to operate upon the material in the mold and there
is therefore no danger that the plunger will tend to force the material back
through the supply opening before that opening has been fully closed by the
knife. The lower ends of the cylinders 2 and 27 may be connected in a similar
way, so that the pistons 3 and 26 will be raised at the same time.
35 is a second plunger which works at the lower end of the mold and is
adapted to be raised so as to form the bottom of the mold during compression.
For this reason the plunger is adapted to fit the lower end of the mold nicely,
but so as to be capable of moving up and down therein. The plunger 35 is
provided with perforations of such a size and so placed as to receive the lower
ends of the core rods, so that the plunger can move up and down upon these
rods. The plunger 35 slides in guides or ways 36 attached to the frame of the
machine. In the most complete embodiment of my invention I provide the
plunger 35 with the die plate 37, adapted to form the lower end of the com-
pressed block in any desired way. The plunger 35 is operated by any suitable
means, such as a piston working in a hydraulic cylinder 38 and connected with
the plunger by suitable connecting rods, as shown, passing through stuffing boxes.
The plunger 35 is adapted to be raised into such position as to close the lower
end of the mold box and support the block of material fed into the same and
thereafter to be raised still farther so as to compress the material at the lower
end while it is being compressed above.
19 is a feed or supply cylinder from which the clay or other material is fed
into the mold. 40 is the supply ram or plunger, which can be operated in any
suitable way, as by a piston working in a hydraulic cylinder 41, and connected
by suitable means with the supply ram 40. If desired a hopper 42 can be used
with the feed cylinder. The supply cylinder is provided with a forming die 43,
which is placed at the end of the feed cylinder next to the mold box. This
forming die is clearly shown in Figs. 8--12. It is designed to give to the material
before it is fed into the mold a form approximating that to be given to the

page_text: completed article. For example, the outer end of the forming die is cylindrical,
as shown in Fig. 10, whereas the inner end is rectangular, as shown in Fig. 9.
The forming die is provided with a regulating plate or block 44, to regulate
the size of the block fed into the mold and with a spreading device 45 to spread
the material in a vertical direction so as to fill out the mouth of the forming
die and to distribute the material uniformly in the block. The construction of
the regulating block can be very much varied. In the form shown it is provided
with a top plate 46, through which the set screws 47 pass. The lower ends of
the set screws are enlarged and turn in recesses in the plate 46. The set screws
are supported in the cross bar 48 and work in threaded perforations in the cross
bar. The cross bar is supported upon the forming die by the bolts 49, as shown
in Fig. 9. It will be seen that by turning the set screws, the regulating block
can be raised or lowered so as to shorten or lengthen the discharge opening
of the die. The regulating block moves up and down in suitable guides as
shown. The form of the spreading device is clearly shown in Figs. 10-12.
It is of a general conical shape at its outer end and at its inner end is more
nearly cylindrical.
50 is a measuring roller placed between the forming die and the mold, the
circumference of which is made just equal to the length of the material or block
which is to be fed into the mold. In other words the circumference of the
measuring or feed roller is just equal to the interior length of the mold box
from end to end. Any suitable registering device can be used with this roller
to indicate each revolution so that the operator can tell when the roller has
revolved once and when therefore sufficient material has been fed in, and can
then shut off the power from the feed ram 40.
51 is a finishing die, forming the lower end of the mold. It is clearly shown
in Figures 2 and 3. It is made of a single piece of cast steel having four sides
and being rectangular in shape so as to conform to the shape of the mold and
to the outer surface or shape of the block which is being molded. On the side
where the knife operates, it is beveled at the upper end as shown in Fig. 2 so
as to receive the beveled end of the knife. When the block is forced out from
the mold, if it is irregular in any particular, this irregularity will be corrected
by the die 51.
The operation of my improved press is as follows: The clay or other material
is placed in the hopper 42 and introduced into the feed cylinder 39. The
regulating plate 44 is set in such a position as to produce the proper sized block
of material for the mold. The plunger 35 is then raised far enough to cause its
upper end to enter the mold and to form the bottom thereof, so as to receive
and support the block of material introduced into the same. At this time the
cross-head 5 and plunger 4 and the knife 23 are in their highest position. The
material is then forced through the forming die 43, over the measuring roller 50,
into the mold, the feed being stopped when the measuring roller has made one
revolution. Power is then applied above the piston 3, and at the same time
above the piston 26 through the connecting pipe 33. The plunger, cross-head,
core rods and knife will all be forced down together until the core rods have
penetrated the material for a short distance, when the resistance exerted against
these core rods will become greater than the resistance exerted against the
knife and the knife will be forced down to the limit of its stroke, cutting off
the material in the mold box. When the knife comes to rest the plunger and
cross-head and core rods will be forced down, the core rods passing through the
material and entering the perforations in the lower plunger 35. If in passing
through the material there is any tendency to bend or deflect the core rods, their
pointed ends will nevertheless enter the perforations of the plunger 35 and guide
the core rods back to their proper position. When the pin 12 and the lugs 11,
11, have about reached the seat in the rest or support 21, the power is turned
off from the main hydraulic system, so that the cross-head and plunger will no
onger continue to descend. The power is then applied underneath the pistons 18

page_text: in the cylinders 19, causing those pistons to rise, and withdrawing the pawls 13
from the grooves 20 in the plunger and thereby disengaging the plunger from
the cross-head. Power is again applied above the piston in the main hydraulic
cylinder and the plunger 4 is forced down along the core rods on top of the
material in the mold, so as to compress the same. At the same time power is
applied to the second plunger 35 and it is forced upward in the mold so that the
material is compressed at both ends. Power is then applied on top of the piston
in the hydraulic cylinder 38 and the bottom plunger 35 is drawn down for a
short distance to enable a plain plate or board to be placed on top of it, after
which the plungers 4 and 35 are again forced down so as to push the completed
block out of the mold. This can be lifted off from the plunger 35 by hand.
The plunger 4 is then raised and when it comes in contact with the cross-head
it raises the cross-head at the same time and draws the core rods out of the
mold box. As the cross-head rises the inner ends of the levers 14 are raised,
but as the outer ends are held down by the weights 15, the upward motion of
the cross-head tends first to engage the pawls in the grooves of the plunger, after
which the clutching device is lifted with the cross-head. The pistons 18 rise in
the cylinders 19. The cylinders 19 are provided with apertures at the upper
ends to permit the escape of air and water. Whatever water was admitted to
the lower end of the cylinders 19 in disengaging the clutch is then let out and
the apparatus is then ready for a second operation.
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. In a molding press, the combination of a mold, a cross-head above the
mold adapted to carry the core rods, core rods carried by the cross-head, a
plunger below the cross-head and provided with perforations through which the
core rods pass, a bottom plate provided with holes to receive the lower ends of the
core rods, and means for forcing the cross-head, core rods and plunger down toward
the mold until the core rods are brought into operative position with their lower
ends projecting into the holes in the bottom plate, and means for thereafter
forcing the plunger down along the rods so as to compress the material, sub-
stantially as set forth.
2. In a molding press, the combination of a mold, a cross-head adapted to carry
the core reds, core rods fastened to the cross-head, a plunger provided with
perforations through which the core rods pass, means for connecting and dis-
connecting the cross-head and plunger, and means for reciprocating the plunger,
whereby the cross-head and plunger can be connected and together forced toward
the mold until the core rods are in position in the mold, and the cross-head and
plunger can then be disconnected and the plunger forced into the mold so as to
compress the material, substantially as set forth.
3. In a molding press, the combination of a mold, cross-head adapted to carry
the core rods, core rods fastened to the cross-head, a plunger provided with per-
forations through which the core rods pass, a clutching mechanism adapted to
automatically clutch the cross-head and the plunger together when the plunger
is raised, and means for disengaging the clutch when the plunger is lowered,
and means for reciprocating the plunger, substantially as set forth.
4. In a molding press, the combination of a mold, a cross-head adapted to
carry the core rods, core rods fastened to the cross-head, a plunger provided
with perforations through which the core rods pass, a groove in the plunger, a
pawl pivoted to the cross-head and tending normally to engage in the groove,
and means for withdrawing the pawl from the groove and means for reciprocating
the plunger, substantially as set forth.
5. In a molding press, the combination of a mold, a cross-head adapted to
carry the core rods, core rods fastened to the cross-head, a plunger provided with
perforations through which the core rods pass, a groove in each side of the

page_text: plunger, pawls pivoted to the cross-head and adapted to engage in the grooves,
levers connected with the pawls, weights on the levers tending to keep the pawls
in engagement with the grooves, and pistons working in suitable cylinders and
connected with the levers, for disengaging the pawls and means for reciprocating
the plunger, substantially as set forth.
6. In a molding press, the combination of a mold, a cross-head adapted to
carry the core rods, core rods fastened to the cross-head, a plunger provided
with perforations through which the core rods pass, means for connecting and
disconnecting the cross-head and plunger, a working cylinder, a piston in said
cylinder, and connecting rods connecting the piston and the plunger whereby
the plunger can be reciprocated, substantially as set forth.
7. In a molding press, the combination of a mold, a cross-head above the mola
adapted to carry the core rods, core rods carried by the cross-head, a plunger
below the cross-head and provided with perforations through which the core rods
pass, and means for forcing the cross-head, core-rods and plunger downward
toward the mold until the core rods are brought into operative position and
means for thereafter forcing the plunger further down along the rods so as to
compress the material, and a second plunger at the other end of the mold per-
forated so as to receive the ends of the core rods when they are forced into
operative position and means for forcing the second plunger against the material
whereby the material is compressed at both ends, substantially as set forth.
8. In a molding press, the combination of a mold, a cross-head adapted to
carry the core rods, core rods fastened to the cross-head, a plunger provided
with perforations through which the core rods pass, means for connecting and
disconnecting the cross-head and plunger, and means for reciprocating the
plunger, and a second plunger at the other end of the mold perforated so as
to receive the ends of the core rods when they are forced into operative position,
and means for forcing the second plunger against the material, and die plates
on the plungers, substantially as set forth.
9. In a molding press, the combination of a mold, a cross-head adapted to
carry the core rods, core rods carried by the cross-head, a plunger provided with
perforations through which the core rods pass, a working cylinder, a piston in
said cylinder connected with the plunger, a sliding knife adapted to cut off the
material fed into the mold and to then form one side of the mold, a working
cylinder for said knife, a piston in the knife cylinder connected with the knife,
and an open pipe connecting the ends of the two cylinders beyond the pistons,
whereby the same power will operate both pistons, but will operate the knife
piston first, substantially as set forth.
10. In a molding press, the combination with a mold of a sliding knife adapted
to cut off the material fed into the mold and to then form one side of the mold,
means for reciprocating the knife, and a ball race adjacent to the exterior surface
of the knife and friction balls in said race upon which the knife rides, sub-
stantially as set forth.
11. In a molding press, the combination with a mold of the sliding knife 23
adapted to cut off the material fed into the mold and to then form one side of
the mold, means for reciprocating the knife, the ball race 28, the balls 30, and
the plate 31 having the lip 32 adapted to hold the balls in the race, substantially
as set forth.
12. In a molding press, the combination of a mold, a cross-head adapted to
carry the core rods, core rods fastened to the cross-head, a plunger provided
with perforations through which the core rods pass, a clutching mechanism for
connecting and disconnecting the cross-head and plunger, means for reciprocating
the plunger, a sliding knife adapted to cut off the material fed into the mold and
then to form one side of the mold, means for reciprocating the knife, a ball
race adjacent to the exterior surface of the knife and friction balls in said race
upon which the knife rides, substantially as set forth.
13. In a molding press, the combination of a mold, a cross-head adapted to

page_text: carry the core rods, core rods carried by the cross-head, a plunger provided with
perforations through which the core rods pass, a clutching mechanism for con-
necting and disconnecting the cross-head and plunger, a working cylinder, a
piston in said cylinder connected with the plunger, a sliding knife adapted to
cut off the material fed into the mold and to then form one side of the mold,
a working cylinder for said knife, a piston in the knife cylinder connected with
the knife, and an open pipe connecting the ends of the two cylinders beyond
the pistons whereby the same power will operate both pistons, but will operate
the knife piston first, a ball race adjacent to the exterior surface of the knife and
friction balls in said race upon which the knife rides, substantially as set forth.
14. In a molding press, the combination of a mold, a cross-head adapted to
carry the core rods, core rods fastened to the cross-head, a plunger provided with
perforations through which the core rods pass, a clutching mechanism for con-
necting and disconnecting the cross-head and plunger, means for reciprocating
the plunger, a sliding knife adapted to cut off the material fed into the mold
and then to form one side of the mold, means for reciprocating the knife, a
ball race adjacent to the exterior surface of the knife and friction balls in said
race upon which the knife rides, and a second plunger at the other end of
the mold perforated so as to receive the ends of the core rods when they are
forced into operative position and means for forcing the second plunger against
the material, and die plates on the plungers, substantially as set forth.
15. In a molding press, the combination with the molding chamber and the
compressing devices, of a feed cylinder provided with a forming die, adapted
to form the material as it is being fed into the molding chamber, the forming
die having an adjustable regulating plate to regulate the size of the block fed
in, substantially as set forth.
16. In a molding press, the combination with the molding chamber and the
compressing devices, of a feed cylinder provided with a forming die, adapted to
form the material as it is being fed into the molding chamber, the forming die
having an adjustable regulating plate to regulate the size of the block fed in
and having a spreading device to spread the material in a vertical direction,
substantially as set forth.
17. In a molding press, the combination with the molding chamber and the
compressing devices, of a feed cylinder provided with a forming die, adapted to
form the material as it is being fed into the molding chamber, the forming die
having an adjustable regulating plate to regulate the size of the block fed in
and having a spreading device to spread the material in a vertical direction, and
a measuring roler between the forming die and the mold, substantially as set
forth.
18. In a molding press, the combination with the molding chamber and the
compressing devices, of a feed cylinder having the forming die 43, provided
with the regulating plate 44, and means for adjusting the same, and with the
spreading device 45, substantially as set forth.
19. In a molding press, the combination of a mold, a cross-head adapted to
carry the core-rods, core rods fastened to the cross-head, a plunger provided with
perforations through which the core rods pass, a clutching mechanism for con-
necting and disconnecting the cross-head and plunger, means for reciprocating
the plunger, a sliding knife adapted to cut off the material fed into the mold
and then to form one side of the mold, means for reciprocating the knife, a ball
race adjacent to the exterior surface of the knife and friction balls in said race
upon which the knife rides, and a second plunger at the other end of the mold
perforated so as to receive the ends of the core rods when they are forced into
operative position and means for forcing the second plunger against the material,
and die plates on the plungers, a fred cylinder provided with a forming die
adapted to form the material as it is being fed into the molding chamber, the
forming die having an adjustable regulating plate and a spreading device to
spread the material vertically, substantially as set forth.

page_text: 20. In a molding press, the combination of a mold, a cross-head adapted to
carry the core rods, core rods fastened to the cross-head, a plunger provided with
perforations through which the core rods pass, a groove in each side of the
plunger, pawls pivoted to the cross-head and adapted to engage in the grooves,
levers connected with the pawls, weights on the levers tending to keep the pawls
in engagement with the grooves and pistons working in suitable cylinders and
connected with the levers for disengaging the pawls, a sliding knife adapted to
cut off the material fed into the mold and then to form one side of the mold
means for reciprocating the knife, a ball race adjacent to the exterior surface
of the knife and friction balls in said race upon which the knife rides, and a
second plunger at the other end of the mold perforated so as to receive the
ends of the core rods when they are forced into operative position and means for
forcing the second plunger against the material, and die plates on the plungers,
a feed provided with a forming die adapted to form the material as it is being
fed into the molding chamber, the forming die having an adjustable regulating
plate and a spreading device to spread the material vertically, substantially as
set forth.
21. In a molding press, the combination of a cylinder 2, with its piston 3,
the plunger 4 connected with the piston and the cross-head 5 carrying and sup-
porting the core rods 7, the die plate 8 on the plunger, the pawls 13 pivoted
on the cross-head, the levers 14 connected with the pawls, the weights 15, the
pistons 18 connected with the levers 14, the cylinders 19 in which the pistons
work, the grooves 20 in the plunger 4, the rest or support 21 for the cross-head,
the knife 23, the piston 26 connected with the knife and working in the cylinder 27,
the race way 28, the friction balls 30 adapted to move in the said race way, a
clamping plate 31 provided with the retaining lip 32, the lower plunger 35
provided with the die plate 37 and operated by a piston in the cylinder 38, feed
cylinder 39, the supply ram 40 and means for operating the same, the forming
die 43 provided with the regulating plate 44 and means for adjusting the same,
and the spreading device 45 and the measuring roller 50, substantially as set forth.
22. In a molding press, the combination of a mold, a cross-head above the mold
adapted to carry the core rods, core rods carried by the cross-head, a plunger
below the cross-head provided with perforations through which the core rods
pass, a bottom plate provided with holes to receive the lower ends of the core
rods, means for forcing the cross-head, core rods and plunger down toward the
mold until the core rods are brought into operative position with their lower
ends projecting into the holes in the bottom plate, means for thereafter forcing
the plunger down along the rods so as to compress the material, and a finishing
die forming the lower end of the mold, and conforming in shape to the shape of
the block to be molded, substantially as set forth.
23. In a molding press, the combination of a mold, a cross-head adapted to
carry the core rods, core rods fastened to the cross-head, a plunger provided with
perforations through which the core rods pass, means for connecting and dis-
connecting the cross-head and plunger, and means for reciprocating the plunger,
whereby the cross-head and plunger can be connected and together forced toward
the mold until the core rods are in position in the mold, and the cross-head and
plunger can then be disconnected and the plunger forced into the mold so as
to compress the material, and a finishing die forming the lower end of the mold,
and conforming in shape to the shape of the block to be molded. substantially
as set forth.
D1
Pow
1
0 T
1
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.