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Патент USA US2133027

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1 Oct. 11, 1938.
H_ Home
' 2,133,027
Filed April 5, 1936
Fig. 1;
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12 Sheets-Sheet l
‘old. 11, 1938."
Filed April 3,' 1936
12 Sheets-Sheet 2
Oct. 11, 14938.
Filed April 3, 1956'
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Filed Aplril 3, 1936
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Filed April 5, 1956
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Oct. 11, 1938.
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Filed April 3, 1936
12 Sheets-Sheet 8
Oct. 11, 1938.
Filed April 5, 1956
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Oct. 11, 1938.
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’ 12 Sheets-Sheet 10
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Filed April 3, 1938
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Oct. 11, 1938.
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Filed April 3, 1956
12 Sheets-Sheet l2
Patented Oct. 11, 1938
_. 2,133,027
arraaa'rus ma momma noLLow ann
Heinrich Hlinig, Moa,'~<;m, casino:
to Richard Collins-and‘John Joseph-Sheridan,
State, and Philip
Morris Scher, London, England
both oi‘ Dublin, Irish Free
, '
Appllcatlonjprll a, lass, Serial No. 72,040
In smear-1m‘ April 10, m5
1': Claims.
(Cl. ‘ll-5)
Thepresent invention relates to improvements
in or relating to apparatus for molding hollow»
articles under pressure from arti?cial resins‘
which are moldable, under the action of heat and
CI pressure. The invention is- particularly‘ but \not
exclusively applicable to apparatus for molding
hollow articles having one or more constricted
portions such for example as bottles and the like
having a constricted neck portion.
. ‘
10. An apparatus for molding hollow articles from
the mold or each mold may be provided with a
removable ‘or separable base and the articles may
be removed axiallyof the mold. In this case
a suitable mold block may include a number of
molding cavitiesv the said cavities having at the
loweror upper part a relatively narrow diameter
corresponding to the ‘external diameter of the
neck to be formed and atthe upper or lower
part a relatively "greater diameter corresponding.
to the external diameter of thebody of the bottle 10
arti?cial resins according to the present invention
or other article.
comprises a movable support for onev or more
molds or mold cavitiesv means ‘for heating said
The 1 neck’ portions of the individual mold
cavities-may serve for the introduction through
one or more molds, or mold cavities and means 3
15 for blowing moldable composition on to the inner suitable nozzles which?t tight against the molds
of ?uidfor example air under pressure for lining 15
molds and/or for pressure. molding and the
by means of ?uid under pressure.
vmolds may be completed by heads'iltting and
The said movable support preferably carries extending a certain distance into the body por
walls of said one or more molds or. mold cavities ‘
mold cavities in which case means are provided,
tions of the cavities. The said heads may be
carried by a plunger adapted to move towards
atone end, and thereby to form completedmolds. the moldblock and/or the mold block may be 20
Fluid admitted under pressure to‘wthe interior moved‘ towards and into engagement with the
of the said mold or molds is employed not only heads to complete the molds. If desired of course
for lining the interior of the molds with the a single mold, instead of a plurality in the block,
25 arti?cial resin composition but also for supply
may be constructed in a similarmanner.
to cooperate with said mold cavities to close them
ing the necessary molding pressure. If ‘desired,
separate sources of ?uidunder pressure maybe
employed for lining themolds and for applying
the molding pressure. In either case one or more
30 common nozzles or thelike may be employed for
supplying the moldable composition to the "in
terior of the mold of molds and for supplying the
‘ The aforesaid nozzlesrmay be carried with the
mold or molds or mold cavities or alternatively
the molds or mold cavities may be brought into
operative relation with the nozzles at a suitable
stage .in the operation of the machine. If the 30
» nozzles are movable with the molds, means are
providedfor connecting them to a supply of ?uid
fluid under pressure for applying the mold- ‘ under pressure and witha supply of the molding
ing pressure. These nozzles _ may be con
nected in turn to a source of low‘pressure fluid
composition for example a molding powder.
vFor charging a mold with the resin molding
preferably air, for lining the moldsgand to fa composition it is preferred to provide means for
supplying a.v preferably measured quantity of
molding composition to a suitable chamber,
source of high pressure ?uid preferably air, for
applying the molding pressure. Itis preferred
however to employ merely a source of air under
high pressure for both lining the molds and ap
The. the
under pressure
molding Pressure.
preferably~ gair
applying the molding pressure will be at a suit
able pressure accordingto the resin employed and
may for example be at a pressure ‘of about‘ 200
cavity or conduit whiclrmay' be connected on
the‘one hand to a source or ?uid under pres 40
sure and on the ‘other hand, to a ‘nozzle or the
like for charging the mold. The nozzles or the
like are preferably provided with a large num
ber of apertures directed towards the sides and
base. oi’ the mold so as to direct the molding com
. position to the walls of the mold.
, >
The apparatus also preferably comprises means '
Incases where the nozzle’ or nozzles is/are
' for ejecting ?nished articles from
‘carried with the one or more molds or mold
molds, or mold cavities. I
the mold or;
cavities, thesaid ?lling chambers, cavities or the
If the apparatus is to be employed ass-am. like
are preferably also carried by the movable
ing hollow articles having one or more constric
'supportand maybe brought into registry with 59
tions, the mold or molds‘must befsepa'rable'. In ,j _ means for'supplying preferably de?nite or meas
the case of articles having a singlev constriction,
ured quantities‘ ofv moldable material‘ thereto.
such for example as bottle shaped articles hav-jv Tlie'said illlingchamber ‘or chambers or the like
ing a narrow neck‘ and an enlarged body portion‘ may be connected togthe nozzles by means of
suitable conduits. Means are provided forv clos
ing the material inlet to each said ?lling cham
ber or the like in order to prevent escape of ?uid
vunder pressure therethrough. Where a plurality
of such ?llingv chambers is provided they may
be connected through suitable conduits to a con
duit common to some or all of them and means
and a conduit having an inlet at the edge of the
rotary table and having branches connected to
the several ?lling chambers and thence to the
The assemblies are carried by the ro
tary table so as to be vertically movable therein.
Arranged at suitable distances round the table are
a station at which the ?lling chambers are
charged, a station at which the material charged
into the ?lling chambers is blown into the molds
and molded under pressure to hollow articles and
under pressure.
, .
a station at which the ?nished articles are ejected
The one or more molds or mold cavities, pref
erably in one or more mold blocZ-zs as above, set from the molds. In this form of apparatus the
forth, may be carried by a rotary table. Such mold cavities are open at the top. The charg
table may be rotated by any suitable means such - ing station comprises means located above the
15 for example as by a suitable hydraulic motor and ' table ior supplying a predetermined quantity of
may be provided for connecting such common
conduit with a supply of ?uid for example air
means are preferably provided for rotating the
table in steps or stages so as to bring the one or
1 more molds or mold cavities into successive posi
molding powder to each ?lling chamber. At the
‘molding station a vertically movable plunger is
disposed beneath the table adapted upon rising,
tions for charging the molds and/or ?lling cham- , to raise a‘ mold assembly and to bring the open
bers, pressure molding, discharging the molded
articles and if necessary, cleaning the molds or
cavities. 'If desired two or more of these opera
tions may be carried out at a single station, for
example the operations of charging the molds
25 and pressure melding.
Means are preferably provided for locking the
table in the successive positions and such means
may be associated vwith means for connecting the
table,‘ nozzles or the like carried by it with“ a
30 source of ?uid under pressure;
tops of the mold cavities into tight engagement
with‘a plurality'of heads which form closures for
the cavities to complete the molds. There is also
a plunger which is movable into engagement with
a recess in the side wall of the table to lock the
table in ?xed position. This plunger carries a 25
nozzie adapted to make airtight engagement with
the aforesaid inlet at the edge of the table. Above
the table also is a'vertically movable plunger (or
there may be more than one) carrying rods
adapted to engage the upper‘part of the assembly 30
The mold or molds, mold blocks or the like may
be mounted so as to be vertically slidable so that
to separate the molel cavities from the heads at
engagement with the charging and/or pressure
ing units to which current is supplied and the
the conclusion of the molding operation.
they ‘can be pushed upwards or downwards into _ mold cavities are surrounded by electrical heat
35 nozzles and/or with closure heads for the molds.
If desired, saidv nozzles and/or ‘heads may be
vertically movable.
The. nozzle or nozzles may enter the one or more
molds or mold cavities from below and the arti
cles ejected upwards or the nozzle or nozzles may
enter from above in which case the articles may
be ejected downwards or means may be provided
for reversing the moid or molds or the like in
which case the articles may again be ejected up
wardly by suitableeiecting members which are
caused to enter the molds. The ?nished articles
may be removed by hand or automatically, if de
sired on to a suitable conveyor.
Means, preferably electrical, may be employed‘
for heating mold cavities and/or‘ mold closure
heads. If desired, the ?uid under pressure for
supplying vthe molding pressure may also ‘(be
It is preferred to employ hydraulic means for
55 operating the various moving parts of the appa- -
rates and such means may be controlled by suit
. able valves which maybe automatically operated ,
in desired sequence by any suitable means for
example by cams ,or the like which may in turn
60 be electrically‘ driven._ The supply of ?uid under
pressure may likewise be controlled automatie
‘ ‘ If the‘ apparatus
be employed for molding,
articles which have external constrictions inter
65 mediate their ends, molds or mold cavities which
are split and are separable laterally may be em
One convenient form of apparatus comprises a
rotary table mounted for rotation in ahorizontal
plane and a pluralityof mold assemblies carried
by said table in spaced relation one to another,‘
said closure heads are also electrically heated. 35
At the ejection station a vertically movable plung
er is arranged below the table and thisplunger
carries ejection rods adapted to engage a plate
carrying ejection sleeves surrounding the perfo
rated nozzles to raise said sleeves and eject ?n 40
ished articles upwardly from the mold cavities.
The said piungers are operated hydraulically, and
the rotary table is driven by an oscillating hy
draulic motor having a one way drive connection
th the table whereby the latter may be inter
mittently rotated.
Suppose that a mold assembly has just received
its charge at the chargingstation. The table is
rotated to bring the assembly to the molding sta
tion. At this instant a valve controlling move 50
ment of the hydraulic ‘motor is closed to stop the
table, whereupon a valve controlling the liquid
supply to the molding plunger, the table locking
piunger and the ejection plunger is opened caus
ing these plungers to move. As the table is
locked in position and the assembly is held in
elevated position against the closure heads, an
airivalve is opened to blow the powder from the
?lling chambers to the molds. ri'he powder ad
heres to the hot walls of the mold and ?ows to 60
form a coating over the inner surface.
A time
switch'then operates to stop movement of all
valve controlling parts preferably cams or the like
and after a suitable time, the control mechanism
is brought into operation again to permit the ?uid 65
to escape from behind the plungers whereby they
return ta their original position. As this‘ occurs,
the hydraulic motor is reversed but ‘does not car
ry the table with it. The'mold, assemblies are
lowered and the upper plunger is actuated to as— 70
sist lowering of the assembly from the closure
said mold assemblies each comprising a plurality ,7‘ heads. The'table is then further rotated when.
of mold cavities open at the top, a perforated noz
zle extending from .below into each mold cavity
75 and each connectedto a separate ?lling chamber,
free to move the assembly to the ejecting station,
to move an empty assembly to the charging sta
tion and to ‘move a charged assembly to the mold 75
ing station. It will belpparent that ‘election
takes place at the ejecting station when the mold
ing plunger is being caused to close the) molds,
and that charging is e?ected- at the charging sta
tion at the same time. Just before the molding
plunger headIfoi the plunger 3. In
the molding'positicn the upper-traverse l2
plunger is lowered, the supply of compressed air
is cut oil.’ and the interior of the molds is opened
to atmosphere.
. f ,
It will be understood that any suitable means
10 may be provided for supplying ?uid under pres‘
sure for molding and for operatingthe various
hydraulic appliances. ‘
The whole may be -con->
are“, situated in‘ casings 23..‘
mountedgon the upper-traverse I! by the ‘mem 10
bers 34 and secured by the nuts II. The mold box
trolled by valves operated by‘. one orv more cam'i
shafts controlled in turn electrically by the time‘ >
V15 switch. Means may be provided for varying the
working pressure and/or‘ temperatures land/or
timing employed to suit particular molding com
In order that the invention
* ‘ may be well under~
20 stood a preferred embodiment will now be de
scribed by way of example only with ‘reference to‘
the accompanying drawings in which:
Figure 1 is an elevation of- the assembled ap-y; '
Figure 2 is a plan view of Figure
paratus in part section,
Figure 3 is a section on the line A-B ‘in Figure ,
Figure 4 is a sectional
box to enlarged scale, ‘
elevation of the mold_
Figure 5 is a plan view of the bottom plate of
the ?lling box, the air conduits'being shown by
> Figure 6 is a, vertical'section through the water
motor, taken along the line H.—I of Figure 7, ' ‘
Figure '7 is a sectional plan taken on the line
F-G of Figure 6,
Figure 8 is a sectional plan taken on the line
K-L of Figure 6,
Figure 9 is ‘a sectional elevation of the table 5
locking unit,
Figure 10 is a vertical section ‘on the line M-N‘
of Figure 12 illustrating in detail a pair 01' piston
Figure 11 is a side elevationof the entire valve
Figure 12 is a plan view of Figure 11,
Figure 13 is an end elevation of Figure‘ 11, and
Figure 14 is ‘a general lay-out showing the pipe
ing arrangements.
In Figure 1 the machine rests‘on a bed plate I . (Fig. 5), connecting the conduits
which forms part of the lower traverse 2, in conduits ll, 59 are connected to the chambers 60,
which the main cylinder and plunger 3 are‘situ? ‘ mung
there being
Pipe one of said chambers 60 below each
ated. Two columns 4 and 5 pass through holes 6,
‘I, in the lower traverse 2 and are secured. by nuts .
8, 9. The columns rest on the lower traverse 2 on '
shoulders I0. Shoulders I I are provided at the "
upper end of said columns and the upper traverse '
l2 rests thereon. Nuts l3 secure said upper trav- ,
60 erse against upward movement. A rotary table H
is mounted on said column 5 and said table has’
the mold box unit It’.
a ,
7 Itunit‘
will be
canapparent- that three'complete mold’- '
be mounted in the table ll, spaced
three uniformly spaced radial slots l5 therein.’
. 60
Figure 2 shows the table it with a complete mold
box unit, I 6 in each of said slots IS. The posi
tions marked in Figure 2 as positions C, D and'E ‘
will be referred to hereinafter as themolding
position, the ejecting position and the filling'poév -
sition respectively. In the ejecting'position' a > p
girder ll carries a plunger l8 hydraulically oper
?lling unit "23 carried'by thebraclret '24 is
from the
r the ?lling, position E the unit :1 lies directly above:
70 ated in'a cylinder 36 and carrying a head IS on‘; ‘ the illling'box 2 I, 'I'he?lling unit 23 consists of‘
which are mounted ejecting pins 20. ‘A, complete 1 '
molding unit comprises a mold box It and a ?lling“. '
‘an outer-‘casing t: attachedto a block 04 through
box 2|, connected by pressure-tight connections‘ which- two? slide plates“, 68 passgthese slide
22. In the ?lling position there is a filling unit plates extend outside the block. 64 at each side
'‘ thereof passing through rectangular slots in said
‘ 1
75 2:. attached to the column s by a bracketHL’fIn" ‘block 04. The outer casing 83 carries twenty.- '
the molding position the mold box It liesdirectly -'
hoppers c1‘ tapering down in holes a which lie ‘17,5
9,188,027 '
Ing ‘position. According to the particular ma
directly above conduits 89 in theblock 84.‘ The terial employed for the molding, it will be de- ‘
two slide plates 85, 88 have holes ‘I9. ‘II respective . sirable to vary the temperature at which the
lytherein, corresponding to the conduits? 89 in molds are maintained. Furthermore it will be
the block 84. It will thus be apparent that by desirable to maintain the molds substantially at
. moving the slider 85, so that the,:holes ‘I8 are over‘
the selected temperature. For this purpose the
the conduits 69 material, contained in said hop bracket 81 attached to: the upper traverse I2
\pers 61 can pass into said conduit 89 while the carries a thermostatic relay (showndiagramma
slide plate 88 remains covering the conduits ‘I2. tically in' Figure l) to maintain thetemperature
The conduit 88 is made of- such dimensions that‘ of the molds substantially constant. _
10 only the quantity of arti?cial resin‘ composition
For rotation of the table I4 in order to move a
or powder required for one bottle molding opera-. '
unit from one position to the next, a
tion is passed therein for each movement of the 'molding
water motor .88 is provided. The water motor 88
slide plate 85. Furthermore when the slide plate (Figs. 6, 7 and 8) comprises a casing 89 sur
881s openedafter closing of the conduit 89 by rounding the column 5. The casing 89 is sup 15
means of the slide plate 85, only, the requisite ported at its lower end on a ball race 98 and a
amount of powder or. the like will fall from the sleeve 9| connected to the table I4 by bolts 92
conduit '89 through conduit 12 and into the ?iling runs on a ball race 93 situated at the upper end
_ pipes.5I registering with said‘ conduits.
of the motor casing 89. The top and bottom of
the motor casing are enclosed in a ?uid tight 20
quantity of powder willthus fall as far as the
20 bottom slide plate BI, which has holes, 13 therein
manner by packings 94 and 95 and screwed pres- '
inregistry with the chambers 68, and which is
sure rings 95 and 91. It will thus be apparent
that a ?uid chamber 98 is provided around the
chambers. 58.
column 5. A ?xed abutment 99 is seated in the
In the pressing position C the mold box unit I8 ' column 5' (Fig. 7). A moving abutment I88 is 25
, lies directly
secured to the casing 89 by the lug I8I. Fluid
plunger 3. When the plunger’! which ‘is hy
inlets I82, I03 are provided in the casing .89.
movable to retain said powder or pass it to the
draulically actuated, rises‘, the table 25 lifts the
entire molding unit in the slot I5 until the, top
Thus'when ?uid is admitted by the inlet I02, the
?uid pressure will act against the vmoving abut
of each of the molds 81 is closed by a closure ' ment I80 to rotate the casing 89 about the column 30
.30 head ‘I4 secured in the die plate 26 by the nuts ‘I5
and carrying between said nut and said die an
electrical heating element ‘I8. '
In the ejection position D the mold box~unit
I8 ‘lies directly above the head I9 of the plunger
I8.. The ejecting pins 28 are ‘disposed ‘on the
‘head l9 so as to lie along the centre line of the
mold box unit I8 and below the bottom plate 45 ‘
when the plunger is at its lowest position. The
bottom plate 45 andthe nozzle plate‘ 81 have
holes therethrough disposed centrally of the noz
zle members 4 I, so that when the plunger I8 rises
plates 45 and 39 ‘
the‘ pins'28 pass through the
and raise the ‘ejector plate .44 and the ejecting
sleeves 43, the ends'of which abut'against the
neck 11 of the ?nished bottle ‘I8. thereby pushing
5. The casing ,89 carries three clutch members
I84 disposed at intervals of 120° round the cir
cumference thereof, these clutch members being
urge'd'upwards by springs I05 into engagement
with tapered recesses in the lower edge I06 of the
sleeve 9|. The said recesses are so disposed as to
cause sleeve 9I and the table I4 to rotate in such
a manner that a mold box I6 will pass succes
sively by the positions E, C, D, upon rotation of '
the casing 89. The ?uid supply at inlet I02 is 40
' cut off after a rotation of one third of a revolu
tion. Fluid pressure is then supplied to the in
let I83 and the inlet I82 is connected to exhaust.
The ?uid pressure will now cause the casing 89
to rotate in a reverse direction through a third .45
of a revolution, the clutch members I84 being
said bottles'upwards from the molds 31. The gradually withdrawn from the, tapered recesses
mold box- I8 is restrained from vertical movement _ and re-engaging with these recesses after the re
.in the ejecting position D by means of a bracketed turn' rotation. Thus it will be seen that by suit
arm 19, attached to the column 5 and by means of able arrangement of ?uid supply, to be described 50
two nuts to a rod 88 mounted on the guides II.
50 The bracket arm ‘I9 is disposed centrally‘ of the hereinafter, the table can ~be caused to rotate.
through a third of a revolution and the motor
mold box I8 in the ejecting position D.
Each of the molds 31 is surrounded by an elec-(
I trical heating element 88' suitably insulated, and
together by leadswin the
55 these are connected
mold plate ‘36. ‘Slip rings 8I situated on the
column 5, and insulated therefrom.v pass current
fromv any suitable source‘ to brushes 82,‘ there
casing 89 can then be reversed in readiness for
the next rotation.
In order to lock the table at the appropriate 55
position after each rotation, a locking unit I8'I
is mounted on the column 4. This unit (Fig. 9)
comprises a pin I88 actuated by a hydraulically
operated plunger I89 in a cylinder H0 and
being one brush on eachofvtheithree rings sup-. adapted to engage in a recess III (Fig. 1) in lugs 60
60 pliedfor use with three phase current. Each of
II2, of which three are disposed on the table I4,
the brushes 82 is connected to. a rigid conductor at intervals of 120°. The cylinder II8 has ?uid
83 which terminates in a plug connection 84 inlets H3 and H4. The inlet H4 is attached to
situated on the table I4.~ A corresponding plug ' a sourceof constant‘ ?uid pressure whilst the
connection conducts ‘the current to the mold supply to the inlet H3 is controlled as described 65
box unit It by means of a ?exible cable 85 which hereinafter. Whenfiuid pressure is applied to
is connected to the heating elements 88 by means the inlet “3 and acts on the surface II5, the
ofa ‘further plug connection 86.- It is to be un
force of the ?uid on the smaller surface H8 is
derstood that there will be a complete unit com
overcome and the pin I88 is moved forward into
prising three brushes, and rigid conductors to.
‘ the'recess I I I. When the ?uid supply to the inlet
70 take the current to each of the three mold boxes I I3 is cut off and the inlet is connected to exhaust
It in the table I4. Itqwill further be apparent the. constant pressure on the surface II8 will
that the brushes-land slip rings allow ‘of con
cause the pin I88 to be withdrawn from the
tinuous heating of. the molds during rotation of
I recess III.
the table, and that the ?exible cables 85 per
Connected to the pin I08, so as to move there 15
mit of movement of the mold boxes to the pressa
. .
with, is a pressure'?uid nozzle II1'which engages ~
members I33, I33, I43, I“, I43, I43, I41 and
in a recess H3 in the lug II2, said recessv II2 the
when the slide plate 33 opensthe slide
being provided with a packing ring to make a plateI Thus
3i. opens and the powder in the conduits 33
pressure tight connection. The nozzle I I1. is con ‘ fallsthrough
the holes 1I and 13 in the plates 33
, nected by a ?exible supply pipe II3 to the source
and II into'the chambers 33. On the side of the
of pressure ?uid for example air... ‘The recess H3
plate. 34 remote from the abutment I43, two
is connected by a conduit I20in the lug II2 to a '
bracketsi43 are mounted. These brackets carry
?exible connection" I2I with a spring valve: I22. 1 'rods
I33 bearing springs III ‘which bear against
situated therebetweem' The ?exible connection
“10 I2I is connected in a pressure tight manner to the'slide‘plate 3| and causeit to close the ?lling
the main conduit 51 in the plate_34 (Fig. 5). A pipes 3I when the slide plate 33 is closed by the 10
plunger: I33.-
rod I23 carried by the table 23 has a’ cam sur
> a
~ In this position therefore, a supply of molding
face I24 adapted to openthe valve I22 when the
table 25 is raised. Upon lowering of the table 23 . composition su?icient for the production of one
the valve will be spring closed. It will bell)?
parent that, at each of the three positions on
the table I4 where a molding unit is; mounted,
there will be a‘ ?exible'connection I2I and 'a
valve I20 leading from the recess III to the main
conduit 51.
It will be understood ‘that each- molding
goes through a cycle of three operations namely
?lling, pressing and molding'and that these three
operations are carried out on different molding
2.5 units substantially‘ simultaneously." I will now
bottle has, been transferred from the hoppers 31
to each of the twenty chambers 33 in the plate 34.
The table I4 is now rotated through a third of
a rotationby the water motor 33, as above de
scribed, and is locked in position with the mold
box lying'immediately above the table 23 on the
plunger 3. It is to be understood that the spring 20
retained member I43 will easily pass under the
cylinder I23, with the member I43 sliding along
the cover plate I32. Simultaneously with the
locking of the tablea pressure tight connection
describe the operations performed on one‘ unit
, (I6 and 2|) in one complete rotation of the table
is made at the recess III in the lugII2 as above 25
and I35 are connected to a common conduit, I36,
and the inlets I33 and I34 are connected to a
common conduit I31. Fluid pressure is applied
composition contained therein along the conduits
described. .Fluid pressure is then applied to the
I4. An empty mold box I6 connec'tedto-a ?lling - main'cylinder to raise the plunger 3. The plunger
box ‘2| is rotated until the filling pipes 5i in'the head 23 lifts the entire molding unit in the slot
I3 until the, top of each of the molds 31 is closed
30 said ?llingbox lie directly below the conduits 12
in the block 64 (Fig. 3); The rotation of the by the corresponding closure head 14, which is 30
table is then stopped and the table is locked in: designed to form the shapeof the bottom of the
?nished bottle 13. ‘ The molds 31 are thus closed
position by the unit I01 as aboveldescribed.
Cylinders I25 and I26, connected to-the block in a pressure tight manner bythe heads 14. I
35 64 by rods I21 and a'strap member I23, aredis ‘Simultaneously with the closing of the molds 31
the cam surface I24 on the member, I23, carried 35
posed one above the other. . Plungers I23 and. I30
(in saidcylinders are connected by boltsand'nuts by the table 23, operates the valve I22 and admits
at I3I, to the slide plates 63 and.“ respectively. highly compressed air to the main conduit 31 in
The cylinders I25 and I26 have two ?uid inlets the bottom ?lling plate 34. ' The air entering the
40 I 32, I33 and I34, I35 respectively. The inlets I32 chambers 33. forces the powder or arti?cial resin
to the conduit, I31 thus admitting‘ ?uid to'the
inlets I33 and’ I34, and causing the‘ slide plate
62. The bottom plate 34 is, connected to the
plate 43 of the mold box I3 by conduits I33, stuff
ing boxes I34 and packing glands I33 being pro
vided at each end of said conduits to make pres
65 (shown in the open position in Fig; 3) to open‘ ' sure‘ tight connection between the plates 34 and 45
and the slide plate 66 to close: 1 ‘The arti?cial 45. A similar pressuretight connection is pro
resin composition or powder »_in each of the hop; videdvbetween'eachrof the twenty conduits 32 in
pers 61 falls through the holes 63- into eachof ’ the‘ plate "and the twenty conduits 43 in the
chambers 69 formed by the block 64 and the plate 43. Thepowder or the like in the chambers
60. is thus forced by the compressed air along the 50
closed slide plate 66. The ?uid supply to, the con
duit I31 is then interrupted and the conduit is conduits-43 and up the nozzle members 4I, being
sprayed onto the sides of the mold "through
connected to exhaust, simultaneously fluid pres
sure is supplied to the conduit I36 thus applying holes I33 in the nozzle member 4|. Suitable
holes I53 are made in the end of the nozzle mem
55 ?uid pressure at the inlets I32 and I35 and cause
ing the plungers, I30 and I23 to‘ open the slide ber 4I sofas to direct the powder over substan 55
plate 66 and close the slide plate. 66 respectively. a tially the whole area of the mold. The molds 31
are, as above described, maintained .at a sub
The plunger I30 carries a cam member I33 hav
ing an oblique cam surface adapted toienga'ge stantially constant temperature and the powder
with the oblique surface I 39 inthe member I43. whensprayed through the holes I36 in, the nozzle
members“ becomes sumciently viscous to adhere
The member I40 mounted on a shaft I“ is car
ried by a sleeve I42 mounted’ in a hole in the to the sides of the mold 31, closed by the die mem
ber 14, and to form asubstantially uniform coat
table I 4. A compression spring I43 ‘ abutting
‘ ing all over the surface of said mold. It will be
tains the member I40 in an operative position but apparentthat whenthe compresed air, for ex
enables the member to be forced downward to ; 'lample at ,200 ‘atmospheres pressure, enters the
' against a ?ange I44 on the said shaft I4I ‘main
allow subsequent rotation of vthe table to another mold 31 the pressure ‘will rapidly build up to 200
atmospheres and, will be maintained for. a- suf
position. At the lower end of said‘shaft I4~I_a ’ ?cient
time-to ‘complete the molding and harden
member I45, having an oblique surface I46 op ing of thebottle.
‘when the molding is completed
70 positely arranged to ‘said oblique surface I33, is
mounted. The said surface I46 abutsagainst the the main air valve vI31, to be described hereinafter 70
oblique surface I41 on the abutment I43 attached is actuated to connect the interior of the moldsto
to the_slide plate 6|. It will thus be apparent . atmosphere.~ Simultaneously hydraulic pressure
thatwhen the. plunger I30 opens the slide'plate is-applied to the two plungers 3I in the cylinders
75 66‘, the slide plate BI is alsor-openedby means of 32, and the cylinder containinglt'he main plunger
. 3 is connected to exhaust; The membersv 23 are 75
' 2,188,087 ;
' moved Elownwards by the plungers 3| and pass
are of similar :construction to the valve I13 shown
Figure 10.
gthrougl‘; holes in the die plate 26 and contact in The
composite valve box I60 _comprises six'of ‘
Iwith the top oijthe mold plate 36 thereby push
the, units I66, the valve chambers I66 thereof be
aZing the whole molding unit down to it; normal .ing
connected together by a conduit 111 so that
‘ position, where'it is suspended in the’ table I4 water admitted by the inlet I69 (Fig. 12) will ?ll
by the lugs 41 contacting with tjne strips 48 run
all of the vaive chambers I66, the remainingr?ve
ning along the edges of the slot I5. By the lower
' ing ‘of the table 25 and the plunger 3 the valve
I22 is spring elosed when the'cam surface I24
movesiout of engagement therewith.
inlets being suitably plugged as at I18. A con
duiti‘i 19 connects all'the exhaust outlets I15 to
gether so that the exhaust water can be disposed
Theitable I5 is now moved through another
third-bf a rotation by the hydraulic imotor 68,
after the locking ,pin I08 and the pressure cori
nection member II1 have been withdrawn from.
connection with the recesses iriithe lug 1 I2 on the
table I6.
after described. The drive to said cam shafts is
taken through a reduction gear I63. All of the
cams operating the hydraulic supply valves are
single lift cams. From the end of the cam shaft
I6! a suitable drive I86 is taken toethe shaft I83
of .a- valve 151 of any suitable kind‘, here shown
The table I! is theniistopped'and locked by the
unit I01 on the column 4 with another molding
» unit in the pressing position C and the mold box
I6- cgntaining the‘ pressed articles lies in the
ejecti'pn position D. V'When the mold box hes
above the ejecting cylinder 36, hydraulic pressure
is applied thereto to raise the plunger I8 with its
head I9 and'theejecting pins 20 thereon. The
said pins 20 passing through holes arranged cen
trally of the plates 15 and 39 (Fig. 3), contact
with the ejecting plate 44 causing the ejecting
sleeves Il3v (Fig. 4), carried thereby to eject the
?nished bottles 18 by pressing against the neck
portions 11 {if the said bottles. The said bottles
may be removed in anysuitable mannervas'ilfor
example byghand,
It will be’apparent thatrsince three molding
units (I6 arid 2I) are mounted in the table I4
. The valves in the said composite valve unit
I601are driven by cams onithe two cam shafts
I6! and I80’ which are driven through gearing
I8I by an electric motor I62, whichris controlled H
by a time switch I82 in a manner to be herein
diagrammatically as a rotary slide valve. , The
slide valve 151 consists of; a-circular slide I85
having on its inner face a substantially L shaped
groove ‘I86. The‘said slide is held by a spring
I81 in pressure tight sliding connection ‘with the
face I88 of the ported member, I89. The'mem- 1
her I89 has the inlet port I90 connectedto the
source of compressed air, the port I9I connected ’
to the pipe H9, and the’exhaustiport I92 con
nected to atmosphere. It will be? apparent that
by rotation of the slide 1.85, in a clockwise di
rection (Fig. 13)" the port I90 will be covered
and the port I9i1 connectedtc the port 192 by
one of the three operations of filling. pressing means of the‘ groove I86;
and ejecting will be vperformed on each of? the
During" the molding operation the air pressure
molds substantially, simultaneously. The three must be "maintained in the mold'31 fora shortég
molding units are then rotated to the next stage time for example about eight to twenty-i?ve sec
of operations, the whole apparatus thus being onds. The motor I62 is therefore ‘connected to
capable of continuous production.
' i
a time switch I82v (shown diagrammatically in
All the operations above described are prefer Fig. 1'), and after the jmoldingi unit has been
ably hydraulically operated, with the one excep ' raised by the head 25 and has been closed by the
tion that the actual pressing operation is per
die members 14; the said time switch opens the
formed by compressed air. For the; controlling of
currentjcircuit to the motor I62 thereby stopping
all the various operations a‘control unit I58 suit
the motor and therefore the cam shafts I6I and
ably mounted on Ia base I59 is provided. The ; I80, when the air inlet port I90 and the port
control unit, shown in details in Figures 10 'to 13, i' I9I to the connection II9 are in connection with
comprisesfga composite valve box I60, cam‘shafts Zone another by means of the groove I85. when
I6] driven by an electric motor I62 through a the pressure has been maintained in the mold for
‘a su?ieient time the time switeh I22 closes the
:The composite valve box I60 consists of six motor circuit and the operation of the entire ap
valve units I64, one of saidunits being shown in ' paratus' proceeds.
section in Figure 10.
Figure 14 shows a general lay out of all the ap
.7 The unit I64 has a caéng l65'havingdtherein paratus employed diagrammatically. I93 is a
two valve chambers I66 and I61 ‘and a connect
water pump which delivers water to an accumu
ing conduitl68. ;The chamber I66 is connected lator 694 the top of which is connected by a pipe
by the inlet I69 to a source of hydraulic power. I95 toa container I96 which is in connection with
The valve chamber I66 containing the valve I10 the air compressor I91. Thus the connection
thus ?lled with water, upon lifting of the valve pipe I95 provides an air buffer in the water con- '
riod I1I, by means of a cam, water is: passed tainer I94. The air'container I96 is in direct
through the connecting conduit 368 and through
withthe compressor at I98 and with
the valve chamber I61 and the éutlet I12 to the connection
I90 in the valve I51 at I99.
cylinder or'the like to he actuated. when the
A hydraulic intensi?er 200 of known type per
operation of the said cylinder or the like is com
is connected by cocks 20I, 202 to the main
pleted the valve I10 closes and the valve I13 se
water pipe line 203. It will be apparent that the
suitable reduction gear I63.
opens to allow;rthe water from the operating
cylinder: to pass§through the port I14 to exhaust
?througl'r' the exhaust outlet I15. When the valve
j I13 closes, the valve I10 is opened and the water
‘is again admitted to the operating cylinder. The
intensi?er need only be included inf the circuit
when a water pressure higher than that provided
by the compressor is required.
The main pipe line 203' conducts water at high
pressure to the inlet’iI18 (Fig. 12) thus supplying
each of the valves I204, 205, 206, 201, 208, 209
with water. ‘The ports I12 of the valves 2| 0, 2I I,
stood that each of the six valve units I66 con- v 2I2, 2I3, 2H, 2I5, are connected respectively to
75 tains two valves, and that all the twelve valves the upper cylinders 32, the conduit ‘I36, the con- 75
valve I13 consists of a‘ main valtje containing sub
sidiary valve I16 to equalize the; pressure on both
sides of the main 'valvie I13. It will be under
- '7
duit I31 (shown in Fig. 3), to the water motor
inlet I02, the water motor inlet III, and the con
1. Apparatus for molding hollow articles from
artificial resins comprising a separable hollow
duit m, the connections being showndiagram -mold,
means for heating said mold, means for
matically in Fig. 14. The conduit 2|! is'connect
ed to the locking unit Ill, the ejecting cylinder‘ blowing a molding‘ powder against the inner walls
01' said
36 and the main cylinder con
the plunger ?uid mold to line the same and for applying
under pressure to the inside 01' the lined
3. The inlet lilo! the locking unit I" is con
nected to the main supply line Ill by a conduit
2. Apparatus for molding hollow articles from
2". All the exhaust ports I15 are connected to-v
10 gether by the conduit I ‘I
arti?cial resins comprising a plurality of mold
open-to exhaust.
and are all maintained
Assuming now that the table I 4,
complete molding units (it and 2|),is station
assemblies, a plurality of receiving chambers
therein, a charging station for supplying mold
able composition to said receiving chambers, a
molding station, means at said molding station
valve 201 is opened by its cam and admits water to co-operate with said mold assemblies to form
through the valve 2 II to the inlet III of the water complete molds, means for admitting ?uid under 15
motor 88, thereby causing, the motor ll andthe _ pressure through said receiving chambers to said
ary after ‘a completed cycle of operations. The
table It to rotate through 120°. The valve 2"
is then closed by its cam and the motor ll stops.
The valve 209 is then opened by its cam to admit
water through the valve M5 to the‘conduit Ill
and thus to operate- the locking unit ill,‘ the
main cylinder containing the plunger 3 and the
ejecting cylinder 36. Subsequently the air valve
IO Ll l5‘! admits air’under pressure to the conduit “9,
this conduit being connected by the member I"
and the recess H8 to the ?exible connection IZI
through the valve I22 opened by the cam mem
ber IN. Immediately the main air valve is
03 L) opened, the time switch I82 opens the circuit of
the motor “52 and thus stops the operation of
the cam shaft l6! and Hill, the compressed air
then completes the pressing operation in the
molds 37.
complete molds, an ejecting station and means
for passing said mold assemblies. to said stations
in succession.
_3. Apparatus for moldinghollow articles from 20
arti?cial resins comprisinga plurality of sep
arable molds, means for introducing ?uid under
pressure to the interior of said molds, means for
introducing amoldable composition into the path
to its entry into the molds, 25
the molds and means for con
trolling said compositlon introducingmeans and
said ?uid introducing means to operate in suc-»
4. Apparatus for molding hollow articles from
arti?cial resins comprising a plurality of open
ended molds, means for closing said molds at one
end, fluid pressure means » or blowing a molding
Simultaneously with the opening of the valve
289, the valves 205 and 236 are operated by
their cams and pass water through the valves
2“ and 282 and the conduits I36 and ii‘! to op
erate the ?lling unit in the manner described
40 above.
After the’ interval of time required for the
composition into the closed molds on to the inner
walls thereof and means for heating the molds.
5. Apparatus for molding hollow articles from
arti?cial resins comprising a plurality of mold
assemblies, each comprising a plurality of molds
open at one end, means for closing said molds at
their open ends, nozzles carried by said mold as
completion of the pressure molding, the time semblies and extending into said molds, conduits
switch I32 closes the motor circuit and thus puts connected to said nozzles, means for'supplying the cam shafts IM and I8. into operation again. I, moldable composition to said conduits, means
As soon as rotation of the cam shafts recom
mences the air valve I 51 connects the port I SI
to atmosphere through the port ‘ I 52. The valve
for supplying ?uid under pressure to said con
duits, means ‘for moving said mold assemblies
successively into operative relation with said com 45
position supplying means and into operative rela- '
2% is operated. by itscams and admitswater
with said mold closing means, and said pres
through the Valve Zi? to the upper cylinders 32,
which cause the plungers 29 to press themold- '_ sure?uid supply means.
6. Apparatus for molding hollow articles from
box down and simultaneously with the opening
arti?cial resins comprising a plurality of mold 50
of the valve 204, the valve H5 is opened to ex
haust by its cam and the plunger 3 is lowered .‘assemblies each comprising a plurality of molds
together with the ejector plunger l8, and the open at one end, a plurality of nozzles extending
locking unit comes out of engagement with the respectively into said molds from theother ends,
and Ya plurality of conduits connected respec
table Ill in the manner previously described. Si
multaneously with the above mentioned operation tively to said nozzles, a movable carrier for said
ber, meansior supplyingair under pressure to said
?cations may be made without departing from
chamber and thence to said mold, means for heat
the scope thereof.
assemblies, means for suplying moldable compo
the valve 208 is opened by its cam and admits,‘
water through the valve 2" to the motor inlet
we, and the motor casing 89 is then rotated in a
reverse direction in readiness for the next rota
tion,'when the casing has rotated so that the
clutch members I04 engage the next succeeding '
recess ‘the valve 208 is closed. ‘The table M then
rotates in the manner previously described. It
will be understood that’ when the head 25 rises
the mold block returns the plungers 29 to their‘ '
raised position the valve 2"! having ‘been opened
to exhaust by its cam..
Whilst in the foregoing _I have described a.
preferred form of ‘apparatus according to this
invention it isto be understood that various modi I
I claim:'—
sition to said conduits, means for supplying ?uid'
under pressure to said conduits, ‘means for clos
ing themolds'of 'a mold asembly at their open 60
ends, meansv for heating said molds, and means
for moving said carrier to carry said. mold assem
blies into voperativev positions .for charging the ‘
conduits, blowing the moldable composition from
said conduits to the walls‘ of the molds.
' '
_7. Apparatus for molding hollow articles'ir'om
arti?cial» resins comprising a separable hollow
mold, a perforated nozzle extending into said mold,
a chamber connected tosaid nozzle,’ means'for ‘
supplyinga moldable composition’ to saidcham 70
ing said moldand means forautomatically caus
_ ing in sequence charging of said» chamber, closing
said mold, and supplying. of ?uid under pressure 75
to said chamberand mold and maintaining the
pressure until molding is completed.
8. Apparatus for molding hollow articles from
arti?cial resins comprising a movable carrier,
means for moving said carrier intermittently, a
plurality of mold blocks carried by said carrier,
a plurality of molds in each said mold block,
means adjacent to the path of said mold blocks
and co-operating therewith for closing said molds,
10 means for heating said molds, a plurality of ?ll
ing chambers, means for supplying moldable com
position to said ?lling chambers, means for blow
' ing moldable composition from said chambers to
said molds, and common control means for said
mold assembly when in position thereunder, a
vertically movable plunger adjacent said carrier,
a plurality'oi mold closure heads opposite said
plunger for closing the molds of an assembly when
the latter is moved by the plunger towards said
heads, means for supplying ?uid under pressure
through said chambers and nozzles to the interior
of said molds when the latter are closed, means
for heating said molds, means for ejecting molded
articles from said molds, means for intermittently
rotating said carrier to bring said mold assemblies
into successive operative-positions, and common
control means for said carrier rotating means,
said material supply means, said plunger, said
a plurality of molds open at one end in said mold
?uid supply means andsaid ejecting means.
12. Apparatus for molding hollow articles from
arti?cial resins comprising a rotary carrier, a
plurality of mold assemblies carried by said car
rier, each assembly comprising a plurality of
molds, means for intermittently rotating said 20
carrier, means for heating said molds, means for
assemblies, a plurality of nozzles extending into
said molds from their other ends, an ejector tube
slidably mounted on each nozzle, a conduit con
and for introducing ?uid under pressure into
15 carrier moving means, said mold closing means,
said composition supplying means and blowing
9. Apparatus for molding hollow articles from
arti?cial resins, comprising a rotary carrier,~a plu
20 rality of mold assemblies carried by said carrier,
blowing moldable composition successively into
the molds or each assembly so as to line them
nected to each nozzle, a ?lling chamber in. eachr the interior of the lined molds, means for open 25
conduit, a closable inlet for molding powder to ing the molds, means for ejecting the molded
articles from the opened molds, and a time switch
each ?lling chambe , means for supplying mold
ing powder to said ?lling chamber when the mold for controlling the time during which ?uid under
assembly is in‘one position, means for closing pressure is admitted to the interior of the heated 30
the molds of a ‘mold assembly when the assembly ' molds.
is in another position, means for supplying ?uid
under pressure through said chambers and con
duits and nozzles'to the interior of said molds
when the mold assembly is in said second posi
tion, means for heating the molds, means co-oper
ating with said ejector tubes for ejecting molded
articles when the mold assembly is in another
position, the arrangement being such that three
mold assemblies can be at the three respective
at the same time, and means for inter
mittently rotating the carrier to bring the mold
assemblies into successive operative positions.
10. Apparatus for molding hollow articles from
arti?cial resins comprising a horizontally movable
rotary carrier, means for intermittently‘rotating
said carrier, means for locking said carrier in pre
determined positions, means arranged above' said
carrier for supplying moldable composition in
‘de?nite quantities to a plurality of chambers
carried by said carrier when the latter is locked in
position, means connecting said chambers with
the interior of said molds, means for closing said
molds spaced from said supply means, means for
suplying ?uid under pressure through said cham
55 bers to said molds when the latter are closed,
means for heating said molds and means for eject
ing molded articles from said molds, spaced from‘
said mold closing means.
11. Apparatus for molding hollow articles from
varti?cial resins comprising a rotary carrier ro
tatable about a vertical axis, a plurality of mold
assemblies slidably mounted for vertical move
ment in said carrier and equally spaced around
said carrier, each mold assembly comprising a
plurality of molds open at one end, a plurality of
nozzles extending respectively into said molds
from the other end, a plurality of ?lling cham
bers connected to said nozzles, and closure means
13. Apparatus for molding hollow articles from
arti?cial resins comprising a separable hollow
mold, means for heating said mold, means for
blowing a molding powder against the inner walls
of said mold to line the same‘ and for applying 35.
?uid under pressure to the inside of the lined
mold, and means for controlling the time during
which ?uid under pressure is applied to the inside
of the mold. '
14. Apparatus for molding hollow articles from
arti?cial resins including a rotary carrier, a plu
rality oi.’ molds carried by said carrier, a plurality
of ?lling chambers carried by said carrier and
connected respectively with said molds, a ?lling
chamber charging station, a mold charging and 45
pressure molding station, means at said last
named station for supplying ?uid under pressure
to the interior of said molds through said ?lling
chamber, an article ejecting station, means for
rotating said carrier intermittently to convey said ' 50
molds successively to and past said stations,
means for locking said carrier in position with
said molds at said respective places, and common
control means for said carrier rotating and
locking means.
15. Apparatus for molding hollow articles from
arti?cial resins comprising a separable mold, a
perforated nozzle extending into said mold, a
?lling chamber, a conduit connecting said ?lling
chamber to said nozzle, a hopper, a measuring 60
chamber below‘ said hopper, means for alter
nately admitting material from said hopper to
said measuring chamber and discharging it there
from into said ?lling chamber, means for heat
ing said mold and means for supplying ?uid 65
under pressure to said'?lling chamber and then to
said mold.
16. Apparatus for molding hollow articles from
for said chambers located above them, ?uid inlet arti?cial resins, comprising a rotary table, a
plurality of mold blocks mounted in said table 70
70 means carried by said rotary carrier correspond
ing in number and arrangement to the number ' for vertical movement therein, each mold block
of mold assemblies, a ?exibleconnection between comprising a plurality of molds open at one end,
each ?uid inlet means and the ?lling» chambers stationary closure means for said molds, means
of the respective mold assembly, means above said for moving said mold blocks in said table against
carrier ior supplying'moldable composition to a, said closure means to close said molds, means for 75
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