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Патент USA US2379738

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July 3, 1945. '
L.. -H. MORIN
2,379,738 -
SERVO-POWER APPLICATION TO DIES OF DIE `GÀS'I‘ING MÄCHINES
Filed Aug. 14. 1942
filme“
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2,379,738
' Patented July 3, 1945 ` ,y
, xulalîrlsn,A vSTATES 'PATENT _' OFFICE 1
`sitltvo Pownn
l
` Aïn’èîrlmnmsor
DIEfCASTING
MAC
E'Morin, Bronx, N. Y., miglior' of onc
halt toDavis Marinsky, Bronx, N. Y.
Applicativi; august 14, 1942, rsemi No. 454310`
Y
)1s claims. (c1. zzz-.ssl .
This invention relates to »die casting ma
the` machine is provided, particularly from the
chines and to. the operation of dies of machines `
`of this type and kind. More particularly. the
invention comprises the application of “servo
power” to thevdies, preparatory to the pressure
injection of casting material into thedies `to in
sure firm engagement of the dies and to resist
standpoint oi’ die operation.
Y
\
From the standpoint of mechanical operation
l 0f the dies, lherein diagrammatically illustrated
and described in brief, reference can be made
to the morespeciñc disclosure ofthe `entire opf
eratìl'lg structure in U. vSi. patents, 1,975,966
`dated October 9, 1934, and 2,193,832 dated March
the pressure of the casting material injected into
the die; and st_ill more particularly to the hy
e 19, 1940, in which patents are illustrated types
draulic closing of dies of high speed die casting 10 of casting machines to which the present inven
machines. The novel features of the invention
tion is applicable.
y
`
will be best understood from the following de»
scription when taken together -with the accom
panying drawing, in whichcertain embodiments
’ It will be understood, however, that the dis
closure of the invention in this respect is only il
lustrative of one `adaptation and use of my in
of the invention are disclosed, and in which the 15 vention.
'
separate parts are designated by suitable refer
In the accompanying -diagrammatic illustra
ence characters in each of the views; and in t' tion, the mechanism controllingldie operation is
which:
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'
Fig. lisa diagrammatic sectional view through I
' applied to only one oi' the dies, the other die
being shown only in part, but it will be apparent '
the dies of a casting machine showing the same 20 that the same structure will -be used in .conjunc
in closed position.
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Fig. 2 is a view similar to Fig. 1 showingthe
dies in open position; and
`
Fig. 3 is a view `similar-.to Fig. U1 showing the
dies improperly closed.
.
e
In the die casting art, it has been known to
provide machines employing hydraulic or pneu
maticY pressures for closing the dies. However,
this has been accomplished by what may "be
tion'with both dies. particularly in casting ma
chines where both dies are movable relatively to
each other and away from a core which sup
ports the ñnished casting and which is used` to
25 eject the casting from the impression or cavity
of bothdie parts. ‘
In the drawing, I0 represents each die part. ,
'I'hese die parts are moved toward and from each
other by die operating slide rods Il having angu
termed a direct stroke which involves rather 30 lar key elements I2 fitting in corresponding
complicated mechanism and a material waste
grooves I3 in the die parts so that," as the rods
oi’ power, in >that, the entire operation ot the
Il move back and forth at right angles tothe
dies has been `through„the' medium employed. ` longitudinal plane of thedie parts I0, the dies
Furthermore such methods of operation are not . ‘ are opened and closed asis specifically taught in
practically applicable to what might be termed 35 the patents hereinbefore cited. l
high speed die casting machines.
' With the fpresent structure, the die parts
` It is the purpose of my invention to provide a
are each provided with long bores or passages I I,
“servo-power" application to the dies, momen
which form cylinders, into which a hydraulic or
tarily at the point of the cycle when the dies
are to be held iirmly closed, that is to say, when
other pressure medium may be injected through
pipes or tubes I5 communicating with admission
the casting material is pressure injected into
ports I6 which open into the cylinders I4 ad
these dies. In other words, this application oi
jacent the ends of the die parts having the vcavpower or pressure in closing the dies is employed
ities I1.
.
in conjunction with and as part of the other me-v
In` the cylinders I4 are arranged pistons or
chanical means for moving the dies toward and 45 plungers I8; which extend through the outer ends
from each other. Furthermore, safety means are
of the die parts and have enlarged heads I9 pro
employed to preventinjury or'dèstruction to the
vided on outer surfaces with projecting `control
dies and other working parts of the machine, and
fingers or dogs 2l) which form extensions on the
also to eliminate `accidents which might occui,l by
piston, which operate in conjunction with pawls
pressure injection of '_ casting material into im 50
properly closed dies, bythe squirting oi' this ma
Supported on the outer end of the dies are pins
terial beyond the limits of the ‘dies'orthe die
22 which pass through openings in the enlarge
cavity. Further, by reason of the momentaryv . ment I9 `of the pistons, and `springs ‘23 are
application of the “servo-power” extremelyl` eco
mounted on the pins outwardly of` the enlarge
nomical and relatively vfool-proof operation of 55 ment and tension of these springs is controlled
2|.
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by‘adjustment nuts 2l arranged on the pins 22.
'l'he springs 22 maintain the pistons Il in normal
inwardly projected arrangement in the cylinders
I4, which inward movement is checked by stops
duced into the cylinder", but lsince the piston
is unsupported by the pawl anger 21, this pres
At 32 is shown a rod pivoted to the pawl 2| for
' thus accidental discharge or squirting of the
actuating said pawl in the cycle of operation of
the machine to bring the pawl into the position
shown in Fig. l slightly in advance of the appli
Vcation. of the “servo-power" and also to raise the
\ casting material through the partially closed dies
is obviated. The machine will continue to oper
sure will operate to move the piston I2 outwardly;
as indicated partially in dotted lines in Fi'g. 3
Gl against the action of the spring Il, the dog 2l
2i.- ,
The pawls 2| are rotatably supported on shafts
sliding under the ilnger 21 in this operation. The
2t, the pawls comprising a »finger 21. notched as
switch 30 ,controls the application of hydraulic
. pressure to the casting material and in order for
seen at 28, to engage the outer end of the dog
2l, as seen in Fig. l of the drawing. -The pawls
the casting material to be injected into the dies,
2| also include a finger 29 adapted tooperatively 10 the switch plunger 3| must be depressed slightly.
engage a micro-switch 30 or the sensitive plunger
Failure to operate this switch renders the pres
sure injection of the casting material inoperative,
2| of said switch for purposes later described.
ate without the production of castings until the
foreign particle or. obstruction is removed and
finger 21 to allow normal .opening of the dies ‘
after the casting has been formed. as is indicated
in Fig. 2.
.
The cycle of operation of the machine will be
_ readily understood from the foregoing description
if one operator is attending f many automatic
i _machines of this type and kind, suitable signal
20 devices can be employed- to indicate faulty oper
ation of the machine, which devices are old and
known in the- art. In addition to eliminating
pressure injection of the casting material in im
properly closed dies, it will also appear that‘the
when taken in connection with the diagrammatic
illustrations in the drawing and the following
statement. ' Considering Fig. l, itwill be assumed 25 application of the “servo-power"_ is relieved
that the dies Il have been moved into closed
through the free action of the piston; thus injury
position and the pawl 2| brought into theposi
tion to engage the dog 20 in the recess 28 of the
finger 21 of the pawl. At this time and through
v suitably controlled means oil or other pressure
element is introduced into the cylinders il
through the tubes or pipes I5, .thus applying the
"servo-power” to the dies lli to firmly support
_ or destruction 4to the dies is obviated.
.
It will lbe apparent that the pawl 2| operates
in the manner~ of a latch, which may be saidqto
engage a bolt 2li, the dog extension on the piston,
in checking outward movement~ of the> piston> and
will be constructed in such manner as to provide
the required backing up of 'the‘piston to care for
the same in closed position. In the same instant
the application of the "servo-power" in closing
or very shortly thereafter in the cycle of machine 35 and holding the dies closed for the moment of
operation, casting material is pressure injected
pressure injection of the' casting material.
into v«the dies at the parting line ß thereof
f `In the diagrammatic illustrations. all struc
through 'a gate or admission passage, not shown,
in that it is disposed at right angles to the dies,
tural 'details with respect to packings of Ithe pis
tons, etc. -have been omitted as these are all- well
to form a casting I4 in thecavities i1 and around
a core pin 35. Immediately thereafter» the hy
draulic or other pressure is released from the
cylinders I4 and the dies are moved into open
known in the arts. Furthermore, the invention
is applicable to die casting machines of various
types and kinds and in fact to any type and kind
position as illustrated in Fig. 2, the pawl 2| hav
of mechanisms where it is desirable to apply a
final pressure or stroke upon a moving part which
ing been raised through operation of the rod 22, 'as will be apparent. , After removing the casting,
-the dies are again closed and the above cycle of
position. In accordance with the present teach
ings, the medium employed is introducedl b_etween
operation is repeated.
the moving part and what might be termed a _
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has been otherwise moved into a predetermined _
As heretofore pointed out. my improved appli
cation of “servo-power" to the dies is particu
backing member, automatically actuated means
being employed controlling operative positionk of
larly adap ble for use in what is termed a high
speed die c ting machine, wherein the dies are
the backing member and otherwise controlling
operation of the machine or apparatus.
Having fully described my invention, what I
opened and closed one hundred or more times a
minute and operations of this type and kind
have been performed at speeds of eight to nine
hundred per minute. It will thus be apparent
' .that the moment of application of the “servo
power” in each cycle of machine operation rep
>claim as new- and desire to secure by Letters
1. In die casting machines, a pair of dies mov
able toward and from each other, mechanical
means för actuating said dies, a member forming
resents in fact a small fractional part of each
a backing for each die and movable relatively to
complete cycle of machine operation and a frac 60 the die, means for injecting a pressure medium
tion of a second.
l
between the die and said backing member to sus
In Fig. 3 of the >drawing is diagrammaticallytain the die in closed position, and a stop for said
illustrated the fool-proof operation of the ma
member adapted to be positioned in an operative
chine, for example, in the event that the dies il!
or inoperative position. »
,
become improperly closed' by the presence of 65 2. In die casting‘machines, a pair of dies mov
some foreign particle, as indicated atrß in Fig. 3
able toward and from each other, mechanical
l _between adjacent surfaces of the dies Il. In
.means for actuating said dies, a member forming
such instances the dog 20 will check downward » a backing for each die and movable relatively to
movement of the pawl 2| or the finger 21 thereof
the die. means` for injecting a pressure medium i
so that this finger will rest upon the upper sur 70 between the die and said backing member to move
face 31 of _the dog, thus maintaining the finger
the die into closed position, means controlling the
22 out of operative engagement with the plunger
operative backing up position of said member,
2| of the switch l0. The machine will perform
said last named means comprising a bolt on said
its normal operation. In other words, the hy
member, and a latch engaging the bolt to support
draulic or other pressure medium will be intro 75 said member in operative position. >
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asvavae
3. In die casting. machines, a pair of dies ,mov
able toward and from each other, mechanical
means for actuating said dies. a member forming
_, a backing for each die and movable-relatively to
>the die, means for injecting a pressure ,medium
between the die and said backing member tc move
the die into closed position, means controlling the
operative backing up position of said member,
said last named means comprising a bolt on said
member, a latch engaging the bolt to support said
member in operative position, and means pre
venting operative engagement of the latch with
said bolt in improper, mechanical, closing move
.
s
:om s backing maintaining meetwaarden
movement in the aforesaid closing movement of '
said die, means releasing said last named means -
in moving the die into open position, and said
backing means comprising va latch engaging a
projecting bolt on said piston.
’
9. In a die casting machine, a die, mechanical
means for moving the die into open and closed
positions, said die having an elongated cylinder,
a piston in said cylinder and projecting outward
ly through one end of the die, means in the die
for introducing a pressure medium into the cyl
inder
at the other end o! said pistonv to move
ment of the die.
.
4. In die casting machines, a pair of dies mov 15 the die into closed position, means operatively
engaging the first named ond of the piston to
able toward and from each other, mechanical
form
a backing maintaining the piston against
means for actuating said dies, a member forming
`movement in the aforesaid closing movement oi
a backing for each die and movable relatively to
said die, means releasing said last named means
the'die, means for injecting a pressure medium
between the die and said backing member to 20 in moving the die into open position, said backing
means comprising a latchv engaging a proiectins
move the die into >closed position, means control
ling the operative backing up position of said - bolt on said piston, and spring means supporting`
the piston in predetermined position in the cyl
member, said last named means comprising a bolt
inder of the die and providing relative move
on said member, a latch engaging the bolt to sup
ment between the die and piston.
port said member in operative position, means
10. In a die casting machine employing me
preventing operative .engagement of the latch
chanically actuated dies movable toward and`
with said bolt in improper. mechanical, closing
from each other, in moving the dies into closed
movement of the die, and said last named means
and open positions, means for applying servo
including means preventing injection. of casting
power to the dies in closing and holding the dies
material into improperly closed dies.
closed during pressure injection ot casting ma
5. In a die casting machine, a pair of dies mov
terial into the dies, and means automatically
able toward and from each other, said dies having
relieving the servo-power application in the event cylinder portions, pistons operating in the die
o! improper mechanical closure of `said dies.
cylinders, means comprising a latch adapted to
11. In a die casting machine employing me
operatively engage the piston of each die cylinder,
means for controlling normal mechanical move
ment of the dies toward and from each other, and
means >for introducing a pressure medium be
tween the dies and said pistons tosustain the dies
in closed position, while said pistons are backed
chanically actuated dies movable toward and from
each other, in moving the dies` into closed and
open positions, means for applying servo-power
to the dies in closing and holding the dies closed
during pressure injection of casting material into
40 the dies, means automatically relieving the servo
by said latch controlled means.
power application in the event of improper me
6. In a die casting machine, a pair of dies mov
chanical closure of said dies, and said last named
able toward and from each other, said dies having
cylinder portions, pistons operating in the die cyl
inders, means comprising a latch adapted to oper
atively engage the piston of each die cylinder,
means for controlling 5normal mechanical move
ment of the dies toward and from each other,
means including means e stopping~ pressure injec
tion of casting material into improperly closed.
dies.
12. The combination with dies of a die casting
machine, of a backing member i'or the die,means
cooperating with said member. retaining the same
in fixed backing-up position, means yieldably
tween the dies and said pistons to sustain the
dies in closed position, while said pistons are 50 coupling the die with said member, and means
for introducing a pressure medium between the
backed by said latch controlled means, and means
backing member and the die in applying servo
providing yieliiable movement of the pistons rela
tively to said dies.
power to the die in supporting the die in closed
position.
7. In a die casting machine. a die, mechanical
means for moving the die into open and closed
13. In an apparatus of the class described, an
positions, said die having an elongated cylinder, a
element movable into open and closed positions,
piston in said cylinder and projecting outwardly
means for moving said element, said element hav
through one end of the die, means in the die for
ing a cylinder, a piston in said cylinder, yieldable
introducing a pressure medium into the cylinder
means coupling the piston and element provid
at the other end of said piston to move the die
ing movement therebetween, while normally
into closed position, means operatively engaging
maintaining predetermined position of the piston .
means for introducing a pressure medium be
the ñrst named end of the piston to i'orm a back--'
ing maintaining the piston against movement in
the aforesaid closing movement of said die, and
means releasing said last named means `»in moving
the die into open position.
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8. In a die casting machine, a die, mechanical
means for moving the die into open and closed
positions, said die having an elongated cylinder,
‘ a piston in said cylinder and projecting out
wardly through one end of the die, means in the
die for introducing a pressure medium into the
cylinder at the other end of said piston to move
the die into closed position, means operatively
engaging the first named end o! the piston to
- in the cylinder of said element, a catch device
automatically movable into and out of engage
ment with said piston tov form a backing for said
piston maintaining a predetermined position
thereof, and means for introducing a pressure
medium into the cylinder of said element vto move
»the element relatively to the piston, while the
piston is maintained in backed position. 4
14. 'I'he combination with a die of a die casting
machine having means mechanically moving the
die into open and closed position, of a backing
member movable with the die in normal opening
and closing movement thereof, means automati
cally engaging said member tc support the >same
4
s 2,379,738
in backIng-up position, and means iniecting a
pressure medium between the _backed up member
and the die to urge the die in a direction away
from said member in moving the die into closed
position.
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15. In a die casting machine employing dies
movable toward and from each other, mechanical
means for actuating said dies, each die having _
.
16. In a die casting machine employing dies
movable toward and from each other. mechanical
means for actuating said dies, each die having
a cylinder and a backing member therein, means
5
for introducing a pressure medium into said cyl
inders between said backing members and dies
for applying holding pressure directly to the dies
' at the moment of forming a casting within said
dies, andmeans controlling the last named oper
a cylinder and a backing member therein, and
4
means for introducing `a pressure medium into 10 ation- of said dies. - v
said cylinders between said backing members and
dies for applying holding pressure directly to the
dies at the moment of forming a casting within
said dies.
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LOUIS H. ’MOREL
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