Патент USA US2514487

July 11, 1950
LLB. GREEN
2,514,486
MOLDING MACHINE
5 Sheets-Sheet 2
. Filed Nov. 21, 1945
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INVENTOR. ’
LEE 5! Gees/v
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July 11, 1950
2,514,486
MOLDING
|_'. B. GREEN
MACHINE ] ‘\
5 Sheets-Sheet 3
Filed NOV. 21, 1945
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July 11, 1950
|_. B. GREEN‘
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2,514,486
MOLDING MACHINE
Filed NOV. 21, 1945
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INVENTOR.
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HTTOENEY5
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July 11, 1950
L. B. GREEN
2,514,486 -
MOLDING MACHINE
Filed Nov. '21, 1945
5 Sheets-Sheet 5
127
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4| [W
F70. 11’
INVENTOR
LEE 5. Gaels/v
Patented July 11, 1950
2,514,486
umrso: sures PATENT OEFIGE:
2,514,486" _
MOLDING MACHINE"
Lee; B..Green, Lakewood, “Qh‘i'oj
Application November 21, 1945, mama 630L086
iaolaims. (cilia-5y
1»
2‘ .
. This;.inventionsrelatesrto .apparatus.;.fon molds
the. cooperatingedie members; ofv onennitioiithe
ing articles from. plastic .material..and;-asroneu-ot
its; objects; aims ‘to. provide..-improvedapparatus
of‘this kind-ibis which plastic articlescan be pro.
machine :andAthe material ‘feeding means which
serves the die~_members;_¢of suchlunit; the-,view
being; taken . substantially‘ as indicateclg; by; _-line
5
duced- very rap-idly;and_ieconomically._~ .
Another’, object .of ;the -.-present inventiomis: to.
Fig.7 4- .is a ,l-partial verticalrsectional, viewr;on~'_;a
providezan- improved molding machin'ewhichcan
larger.- scale vtaken through , the‘ idieg-memh?llswof
be .usedjin. producing; a varietyroii different vsplas
tuatinefone. of the
theunits
grouped-1
andishowina
die p1unsers-.;
thesmeans-ior
Fig; -5 liss'a transverseqsectional view taken 10h
line .5.-.—5rof< Fie;;;4~;_and further: illustratinaz-the
ticf: articles and .whichscan be a used: to particular
advantage in :producing.threaded'zplastic; articles;
such- as. bottle caps; ; because; it; ~ embodies-1 novel
means-(for ,dis'engagingi. the rthreadeforming die
membenj'fromthe molded-articles.
A furthers-object» of theginventioniis to; provide
actiiatina: means: for the: grouped , die; pioneers;
Fis'.;6'is:a-.partia1 vertical sectional-:viewrtaken
thrcuehianother;part‘ 0i;:the :die ‘plunger-emu:
an . improved; molding. machine. oi; the-character
ating means has ; indicated. by; line .5I—,—.-B-'.;0f ;Fig:. I
Fig;._;_ '7- is . ' a- sectional [plan tview‘ thereof: taken
mentioned, in which the dieimernbersare-capable
ofrprodu‘cing, a group. oLthe: plasticzarticles inone
molding. operation; andgnovel, means employed
on line. 1‘—1\of;;.-F.ig.,6'...
Fig 8; is: another-.1 partial: plan. 'viewr-otathecmn-le
for. disengaging onerofxthendie- members. from the
20
molded articles. .
Stillanother: objectwofsthis invention is-;tc,<pro-.
videuani improved plastic-molding machine; hav:
ing azepluralityy of molding ‘units; disposed : in.:.,a
group, and in , whichimoldable. material; is; fed, by
novel means-to themespectiveyunits; from 3115111?
$193.01‘ central magazine.
A .further; object 01 the‘ inventionjstto provide
improved multiple _ ‘unit ,molding: apparatus}; in
which thermolding units: are, disposed-in an‘ ape
nular' or polygonal , group-andthe; central mega:
zine isilocatedinside;thepgroup,~
,
Yet another object; is .to‘ provide an improved,
plastic molding: machine . of the .type having; such
grouped units and; central magazine andv where;
in.-novel.conv.eying means-_-.is..disposed.relativeqto . “
the-units. so ,asto. receive the molded‘; articles
therefrom.
.
3.-_3-ofiFig.p2.- _
.
This‘ invention also seeksv to provideimproved
molding apparatus-of the. character. mentioned, 4
tinlesrunit machinenandazshowins ‘thezzconveyina
andicollectinameansrfor the molded articles.
Figs 9 ‘isia zpartialaelevational view :show'ng the
mechanism for.‘ actuating; the.v shuttles: whic. feed
themoldable materialize. the.respeetiwe-~units;v
Fig. l0.~is a partial plan view- ofsuch mechanism
asseen fromzthe. direction indicated by: H1191] us-m
Oil-Fig‘; 9:"
- l-
_
Fig-.11; is a partial venticaksectional view taken
through: .-a::modi?1ed;form ,of .multinleii-nit:plastic
molding machine-s,
Fig. 12 is a sectional elevation taken through
theadie .mem-bers :thereof .
Fig. 13 ;:is;:a transversei Sectional :view: taken-.pn
line; I 3-"—-I3‘:of-. Fig. .12;
.
Eigrlll is a sectional lcletailgview; taken through
one: of- the :feed: shuttles and showing a- mod-iii‘.-v
ca-tionl thereof: .
Fig..=.,l5 is a plan :view' showing. a bottle: cap and
repres exiting: one- formsof-i . plastic article which
which embodies argroup of; individual molding 40 can‘ - be-l'producem' by» the improved-Iv molding; ma‘
units and. wherein one or; more unitszcan be teme
ch-in'eyand"
I
porarily cut; out. and.» rendered- inopera-tive while
the others continua inroperatiOn. ,
" Iii-the embodiment of-‘ the ~-invention illustrated
The. invention-can beiurther brie?y summar
izeds as ‘consisting, .im certain novel-combinations 45. inFigsrI; 2-‘an‘d3, the drawings show a vmultiple
and ‘arrangements; of" parts . hereinafter-described
and-‘particularly set ,' out in the appended ‘claims.
Fig. 1. is- an'elevational view- oi, a- multiple ;unit
plastic molding ‘ machine: embodying; the ' present
invention; pOrtions "of > the machine being ' shown
in' vertical section.-
I
_
Fig. 2-is.-;a-plan;view ofthe machine showing
the: same partly: in horizontal,se_ction,,as.:indi7
cated by’ section ,line,2-.-2. of: Fig-l . 1.
Fig-1.31155 awpar-tial sectionalnelevatlon-showing "
unit molding machine l0 whichv-canebeusedifor
rapidly ‘and economically producing" plastic arti-.
cles "such as the ‘moldedjbottlecap‘ ll shown in
Figs. 15;.‘and 16jor variousother molded‘ articles,
The'bottle‘caprl ‘I here shown is‘ of a conventional
form having therein a recess Ila and’ an, internal
screwthreadQIZ.‘ molded in the side. walljoi the
recess. Thepaj'rticular cap here shownalsohasa
convexly' rounded top. l lb... One ofthe ‘problems
presented in molding plasticyarticles having ,such
2,614,486
4
a threaded portion is the step of disengaging the
thread-forming portion of the die from the
molded article. This is accomplished in the pres
ent machine by novel means and in a practical
manner as will be explained hereinafter.
The machine [0 includes a frame l4 which pro
vides a support for the various members consti
tuting the respective molding units 15. The indi
vidual molding units 15 are servedby a common
or central magazine [6 which ‘contains a supply
of any suitable moldable material H such as a
plastic material in powder, granular or pellet
form.
These molding units can be arranged in a ‘
row adjacent the magazine It, or preferably‘ as
here shown, are disposed in an annular or polyg
onal group which surrounds the magazine. The‘
the group. The conveyor member 36 is supported
for annular movement as by an annularly ex
tending row of bearing members 31 which are
mounted on a frame extension 38, the latter be
ing supported by the shelf 22 of the frame I4.
As shown in Fig. 1, the movable conveyor mem
ber 36 is located at substantially the same height
as the top of the die body 29 so that molded arti
cles displaced in a direction laterally or radially
outwardlyfrom the die body will‘. bev transferred
onto‘ this" ‘conveyor member.” A substantially
horizontally disposed feed plate 40 located at an
elevation corresponding with the top of the sta
tionary die body 29 spans the space between the
die body and the conveyor member 36 and forms
a support on which the molded articles can be
slid during their movement outwardly to the con
veyor member. An upright annular guard rail
an upright relation which conserves space and
4! extending around the conveyor member 36
permits the magazine 16 vto be disposed in a cen
tral upright position soelthat the feeding of the 20 prevents the articles from falling o? of this con
veyor member or being projected. therebeyond
moldable material I‘! will be assisted by gravity.
molding units 15 are preferably also disposed in
-‘ The frame Mean be of any appropriate con
while being discharged ‘from the‘ die body 29. '
struction and shape and, as shown in this in
stance;v includes a substantially horizontal base
[9 adapted to stand upon a floor or other support
As best seen in Figs. 3 and 4, the stationary die
body 29 comprises a hollow member in the upper
and a hollow central member or column 20 ex
or more bores or die cavities 43 of a shape corre
end of which is located a die insert 42 having one
sponding with the. exterior of the article to be
molded. In this instance the die insert 42 is pro
vided with a group of six such die cavities which
lar cylinder support 2| to which further refer;
ence'will presently be made. At different dis 30 are disposed in an annular group surrounding the
central vertical axis of the die mechanism. .Since
tances above-the cylinder support 2| the column
the bottle cap H is circular in plan shape the
20 is provided with surrounding annular ledge
bores or die cavities 43 are of a corresponding
or table portions 22 and 23. The frame 14 also
cylindrical shape although they. can be of any
includes inner and outer upright tubular mem
bers 24 and 25 which form the inner and outer 35 other desired plan shape according to the ‘form of
the article tobe molded.
'
l - ~
walls respectively of the upper portion of the
The die body 29 also includes a lower die mem
magazine IS. The tubular‘members 24 and 25
ber or'plunger; or as shown in this instance, a
are mounted on the upper portion of the hollow
group of lower die members or plungers 44 whose
centralcolumn 29 and themse1ves form supports
for various parts of the molding units. The in 40 upper ends extend into and are-‘slidable in the
die cavities 43. The plungers 44 form the closure
her tubular member 24 preferably extends down
members for the lower ends of the die cavities 43
wardly“ beyond the outer tubular member 25 and
and, in this instance, the tops of the plungers are
partway into the upper end of the hollow column
29. The bottom wall of the magazine I6 is I of a concave shape as indicated at 45 to corre
formed by an inclined annular plate 26 which ex 45 spond with the-c'onvexly curved top lib of the
bottle cap I I. The lower die plungers“ are car
tends downwardly and outwardly from the lower
ried by a holder 46 which is,- in turn, connected
end of-the tubular member 24 for directing the
with an upright actuating ‘rod 41. The lower end
moldable material toward annularly spaced feed
of- this actuating‘rod- extends into and is con
openings 21 which serve the respective molding
nected with the piston of the 'lower actuating
units [5.
.
cylinder 3!. This cylinder is a'double-acting cyl
Each of the molding units l5 includes a sta
inder and when suitable motive fluid,»such as oil
tionary die body 29 supported on the annular
under pressure, is supplied to its lower end by the
shelf 22 of the frame l4 and a die head 30 which
fluid connection 48 the plungers 44 will be moved
is disposed above the die body and is movable
toward and away from the latter. Each molding 55 upwardlyto‘ apply'pressure' to the moldable ma
terial in the die cavities 43 and to subsequently
unit I5 also includes a lower actuating cylinder
lift the molded articles out of the die cavities.
3| mounted on the annular cylinder support 2|
When pressure ?uid is supplied to ‘the upper end
and an upper actuating cylinder 32 supported by
of the cylinder 3! through the connection 49 the
the annular shelf 23 and located in substantial
vertical alignment with the die body 29 and the 60 die plungers 45 are retracted or moved down
wardly in the die'cavities.
'
lower cylinder 3|. Each of the units 15 also in
Moldable material from the magazine I6 is sup
cludes adie plunger actuating. device 33 which is
plied to the die cavities 43 by novel feed mecha
‘supported on the upright tubular member 25 and
nism which will be described next. This feed
is located above and in substantial alignment
65 mechanism includes a, feed slide or shuttle 5| for
withthe upper cylinder 32.,
each of the molding units l5 and which shuttle is
'_ In addition to the main portions of the mold
reciprocably movable across‘the upper face of the
ing machine H! which have already been re
die body' 29 and the die-insert 42-." The above
ferred to above, the machine includes a conveyor
tending above such base. The base l9 projects
laterally beyond the column 20 to form an annu
35for receiving and collecting the molded arti
mentioned-feed plate 40 is extended laterally in
cles_.' This conveyorincludes a traveling convey 70 wardly beyond the die body 29and forms a sup
port upon which the shuttle 5I'is slidable. The
or member 36 which extends adjacent the sta
shuttle 5| can be in the form of an elongated sub
tionary die’ body 29 and when the mold units 15
stantially flat block or slab and has'a feed cham
are in an annularlygrouped arrangement as here
shown, this movable conveyor memberisvin the
ber 52 therein of suitable size and shape for hold;
form of an annular member extending around 75 ing an appropriate quantity of the moldable ma
2,514,486
5.
terialilll ‘Whenv the die'zbody 29 is providedwith a
cooperates .withlia latch member 65'r‘mounted110n
group of the die cavities 43, as mentioned». above,
the feed chamber=52iisof a size to. encompass all
theframe‘ l4‘ and when the handle is ‘111?. itsvv full
of thesecavities and to'carry a' sufficient quantity
of material to provide. a proper charge of mold-'
able material in ‘each ‘of these cavities.
When .the feed shuttle 51 is jinzits retracted po-:
sition as shown in Figs. 1 and 3, the feedchamber
52. is in communication with'the lower end of the
magazine 16; through the: feed passage .21 and
then receives a charge of the. moldable material
H‘ from the magazine.
When .-' the‘ . shuttle is
moved outwardly throughga. feeding stroke the
line ‘position of Fig. 10'the pin 62 will be engaged
in the sector 61 for connecting the lever 5T'for
oscillation withithe sector. When thehandle 64
is shifted to its broken'line position of ‘Fig. 10
the pin 62 will‘be ‘retracted from the sector and
_ the feed shuttle 5i of the correspondingxmolding
unit l5‘ Willbe rendered-inoperative while the
feed shuttles of other units may continue toop
erate. When the pin'62 is engaged in the‘sector
6| it oscillates with the sector and this move
ment of the pin is accommodated by the arcuate
chamber'52 is translated‘ to a- position; overlying
slot 66 of the pivoted fork head 63a;
and communicating with" the die cavitiesv 43, 15
The die head 3ft comprises a generally‘ cylin-;
whereupon, thesmoldable material "will be'fed
drical vertically elongated body whose upper end
downwardly into these'cavities. After each such
extends into the upper cylinders! and forms or
feeding stroke the shuttle, is retracted to the
carries a» piston‘iiT which is reciprocable- in" this
charging position for-re?lling of the feed cham
cylinder for» actuating the die head. This die
ber 52 from the magazine [6 preparatory to the
head carries one? or more upper die1 plungers 68
n‘ext‘feeding stroke:
'
which cooperate with the lower die plungers'li?.
The outer end of theshuttle 51 is provided with
for applying molding pressure to‘ the moldable
a thrust element or bumper53, such as a block of
material previously fed to the diecavities-M’i:
wood or rubber, which kicks the previously mold
Whenthe die insert 42 is provided. with a group
edrarticle or articles off of the top of'the mold
of the die cavities 43 as in’ this instance; a,» cor
body 29v with suf?cient‘momentum to cause them
responding number ‘of the plungers Saris pro
to slide outwardly over. the feed plate'4il. onto the
vided on the die head '30. The plungers 68 pro
movable conveyor member 46.
p
ject from the lower end‘ of the die‘ head and are
The feedv shuttles 51' for all of the molding
movable into the die cavities it. These plungers
units l?ican be actuated simultaneously and, for 30 are of a size to correspond with the recess’ Ila
this purpose, the machine. H‘! is provided with a
, vertically reciprocable commonactuating rack 5i
(see Figs. 1 and‘ 9).
Whenthe molding units
are disposed in the annular group above described
which is to be molded "in the bottle caps l I- and
have thread-forming portions 68a thereon for
molding the internal threads min the caps;
For closing the upper ends'of the die cavities
the rack-54:15 annular or polygonal in shape and is 35 43 so that the material therein can be subjected
located centrally of the group and. carried by- a
to pressure by the lower die plungers 45, the die
vertical actuating rod 54a which extends through
head 30 is provided at‘ its lower end with hollow
thetubular frame member-241 The upper end of
extensions 69 of a'size and shape to‘ enter and
the actuating rod 54a extends into a'centrally
close the die cavities. The upper die plungers 68
disposed double-acting pressure ?uid cylinder 56 40 project from the die headv 30 through these ex-'
and isrconnected with a pistontherein. The feed
tensions and when'the die headlhas been‘low
ered to a positionadjacent the die body 29‘ in
shuttles 5I~are connected with'the rack 54 by
linkages 55' which are substantially identical with
which the die cavities are" closed by’ the extension
69, the-threaded portions 682» will extend‘ into the
each'other and'one of which will‘n’ow be de
die cavities in the proper relation for forming
the internally threaded recesses Ila in the arti-'
The linkage 55 includesa bell crank lever 5'!
cles. Downward; or closing movement is imparted
which‘is supportedaby'a bracket 58'for swinging
to‘ the die head 38 by supplying pressure?uid
movement on a pivotl59. The shuttle 5| is‘con
to the upper end of the cylinder 32 through the
nected with the upperend, that is, ‘the relatively
connection Til.‘ Upward or opening movement is
longer arm 51a of the lever 51 by a ball and imparted to the die head 3!] by supplying pres
socket ccnnection‘?ll': The linkage also includes a
sure ?uid to the lower end of the cylinder 32
sector 6| adjacent which the lower end ‘of the
through the connection ‘M. Fig. 3 shows the die
bell vlcrank lever. 51'- is disposed and whose outer
head in its lower or die closing position and with
end hasa toothed portion Sia which meshes with
the material being molded to article form in the
the rack 54. The sector 6! is also mounted for
die cavities £33. From the construction just de
swinging movement on‘ the'pivot 59 of the bracket
scribed it will be seen that the plungers G8 and
58. The sector remains» permanently in engage
the sleeves or hollow projections 69 together form
mentwith the rack -'54 and is oscillated on the
the upper die members or composite die plungers.
pivot 59=as the rack is reciprocated by the power
When the articles H have been moldedin the
cylinder 56. The. relatively shorter arm 51b of
diecavities tithe threaded portions 68a of the
the lever 5‘! is adapted to be connected with or
upper die plungers‘ 68 will be locked in the die
disconnected from the sector 6! by the pin 62 ac
cavities by the molded articles by reason of the
cording to whether the shuttle is to be actuated
interengagement between the threads of. the die
or rendered idle. Wheneverit is desirable to ren
plungers and the articles. Before lifting the die
der the feed shuttle of one of the molding units
head 38 it is therefore necessary to disengage or
i5 inoperative the pin 62 of the corresponding
unscrew the upper plungers 68 from the molded
linkage is withdrawn from an opening of the
articles. To permit this to'be done the plungers
sector 6!, whereupon, the sector will have an
68 are mounted in the die head 30 (see Fig.4) for
idle rocking movement on the pivot~59 and will
be ineffective for rocking the lever 51'.‘
both rotary and axial movement. The rotary‘
movementis imparted to all of the plungers’ G8
The control pin 62 is suitably carried by the piv~
simultaneously by means of a driving pinion ‘l2’.
oted head 6300f the fork 63; the latter being piv
Each‘of the plungers'?t‘ has a gear 13' thereon
otallymounted'on the bracket‘58 by the member
which meshes with the driving pinion'and; as
631) andadapted to be shifted by means of' a
handle 64 projecting’ therefrom. The handle 64 45 shown in Fig. 5,» the gears of the plungers form
scribed.
‘
‘
>
2,514,486
7
a group or cluster surrounding the pinion. The
pinion is mounted in the die head 30 by suitable
bearings 14 and 15 which hold the pinion against
radial and axial movement. The gears 13 of the
plungers 68 are of a greater axial'length than
the pinion 12 and remain in full engagement with
the latter during the axial shifting of the
plungers.
The axial movement of the plungers 68 is im
parted thereto simultaneously with their rotation ;
such that the threaded portions 68!» will have
a lead or axial movement appropriate for the
threads which have been formed on the molded
8
the die ‘cavities 43 by being screwed into the molds’
able material.
When the threaded portions 68a have been
moved into the die cavities for the proper dis
tance, the actuation of the plungers is stopped
and the condition of the molding dies is then one
in which the cavities 43 are charged with mold
able material and are in the closed condition with
the thread-forming portions of the upper plungers
vE58 therein in their proper position. The moldable
material is then subjected to pressure by actuat
ing the lower cylinder 3! to move the lower die
plungers 44 ‘upwardly in the die cavities. The
pressure applied by the plungers 44 causes the
material to be: compressed to the density and
volume desired for the molded article. During
the application of this pressure by the lower die
articles. For obtaining this axial movement the
plungers and die head 30 are provided with co
operating screw elements ‘!6 having the same lead
or pitch as the thread which has been formed on
the molded article. During the rotation of the
plungers the upper cylinder 32 merely functions
plungers by the pinion 12 the thread elements
as a holding cylinder for holding the die head in
16 impart the desired axial movement so that the 20 its closed position.
threaded portions 58a of the plungers will be
The driving pinion T2 of the die head 30 is
unscrewed from the molded articles and retracted
driven, in this instance, by a hollow shaft 18 which
into or relative to the die head 30. Axial move
projects from the die head through the tubular
ment of the plungers 68 in an upward direction
extension 19 thereof. The lower end of the shaft
is limited by the engagement of their pinions
18 is provided with teeth or serrations 80 which
with an abutment surface or stop 30a of the die
are held in meshing relation with corresponding
head and axial movement in a downward direc
teeth or serrations 8| formed on the body of the
tion is limited by the engagement of the thread
pinion 12. These teeth are retained in meshing
carrying portions of the plungers with the abut
engagement with each other by the rod 82 which
ment surfaces or stops 3012.
extends through the hollow shaft 18 and has its
When the threaded portions 68a of the upper
lower end connected with the pinion 12 by the
die plungers 68 have been disengaged from the
threaded engagement '83. The hollow shaft 18
molded articles in the manner just described the
extends upwardly from the cylinder 32 into the
die head 30 is lifted or opened relative to the
housing of the device 33 which, as mentioned
die body 29 by supplying pressure ?uid to the
35 above, forms a part of the mechanism for disen
lower end of the cylinder 32 through the connec
gaging the mold plungers 68 from the molded
tion ‘H. The lifting of the die head 30 disen
articles.
.
'
gages the extensions 69 thereof from the die cav
The device 33 is here shown as having a hous
ities 43 thus leaving the cavities open for the
ing 85 suitably supported on the tubular frame
ejection of the molded articles therefrom. There 40 member 25 and having a gear '86 rotatably mount
upon the lower cylinder 3| is operated to move
ed therein. The hollow shaft ‘I8 has a splined
the lower die plungers 44 upwardly in the die
portion 18a which extends through and cooper
cavities. This upward movement of the plungers
ates with a splined hub 81 which is also rotatable
44 lifts the molded articles out of the die cavities
in the housing 85. The gear ‘86 is disposed around
to an exposed position in which they can be en
the hub 81 but is not connected therewith. In
gaged by the bumper 53 of the feed shuttle 5|
disengaging the threaded portions 68a of the up
for kicking the molded articles off of the die body
per mold plungers ~68 from the molded articles,
29 and across the plate 40 onto the movable
it is desirable that the initial disengaging move
member 36 of the conveyor 35..
ment be imparted suddenly to these plunger por
The same movement of the shuttle 5! which Q
tions. For this purpose, the gear ‘86 is provided
kicks the molded articles from the die body 29
with an upstanding pin or stop '88 and the hub
moves the feed chamber 52 to a position over
lying the die cavities 43. At this point in the
sequence of operation the lower cylinder 3| is
operated to move the lower ‘die plungers 49 in
a downward direction, thereby sucking the mold
able material from the feed chamber '52 into the
die cavities 43. It is not necessary that the die
plungers 44 actually produce a suction because
in certain instances the moldable material may
be of a character to flow by gravity downwardly
into the die cavities substantially simultaneously
with the downward movement of the plungers.
When the die cavities have thus been ?lled with
the moldable material, the die head ‘30 is moved
to its closed position by supplying pressure fluid
to the upper end of the cylinder 32 through the
connection '10. This causes the extensions ‘89 of
the die head to close the upper ends of the die
cavities as mentioned above, thereupon, the upper
die plungers 68 are actuated by imparting thereto
the above described rotary and axial movement
in a direction to cause the threaded portions 68d
81 is provided with a radial arm 89 which co
operates with the stop -88 in forming a lost
motion driving connection ‘between the hub and
gear.
‘The gear ‘86 is driven by a suitable power de
vice such ‘as the fluid pressure rotary motor 90
having a driving pinion 9i meshing with the gear.
When the threaded portions 68a of the die plung
ers have been projected from the die head 30
in the manner described above, the hub 8'! will
come to a stop by reason of the engagement of
the plungers 68 with the abutment surface 30b
of the die head. The ?uid motor 90 will there
upon be stalled with the pin 88 of the gear 86 in
engagement with the arm 89 of the hub ‘81.
Whenthe die plungers 68 are to be rotated to
disengage the portions 68a ‘from the molded ar
ticles, the ?uid motor 90 is operated in the op
posite direction causing the gear 86 to be rotated
in a direction which carries the pin ‘88 away from
the arm 89. The hub 87 will temporarily remain
stationary and no rotative movement will then
be imparted to the die plungers 68. However,
to be projected from the die head and moved into 75 when the‘ pin ‘88 has travelled through a distance
atlases
5:9
~10
just short ofa full- revolution it will suddenly en
ward and through the opening 96. The combined
gage the arm 99 from the opposite side and by
picking up‘the arm will rotate the hub ‘81 in the
movements of the. conveyor member 35 and the
direction desired for disengaging the plunger pore
placed from the conveyor member through the
opening 96 into the chute 91. From the chute
tions 6811‘ from the molded articles. The engage
ment of the pin '89 with the arm ‘89 in this man
ner causes asudden initial actuation of the die
plungers '68 which is desirable for breaking the
portions 68a away from the molded articles. The
lost-motion connection between the gear and hub
also enables the motor 99 to accelerate to its
working speedvbefore picking up its load.
>
When the portions 68a have been fully disen
gaged from the articles by the above described
belt 98 will cause all of the articles. to be dis
91 the molded articles can be discharged-directly
into a container, or as here shown, can be. delive
ered onto a belt conveyor 99 by which thearticles
can .be carried to a desired place-of storage or
further. treatment.
.
-.
.
r.
I
-
»
In the conveying mechanism just described
above the annular conveying member 35 is driven
by a sprocket I00 which cooperates with the outer
periphery of this conveying member. ‘For this
combined rotary and axial movement, the upper 15 purpose the conveying member. 35 can be provided
with an annular series of teeth in its outer pe-_.
ends of the plungers will engage theabutment
riphery or, preferably, as here shown, has achain
surfaces 30a of the die head and further move
IOI extending around its outer periphery and an
ment of the .plungers and of the hub 81 will be
chored thereon and with which the sprocket I99
stopped. The ?uid motor99 will again be stalled
and ‘will remain in this condition untilits direc-. 20 has driving engagement. -The belt 98 andthe
tion of rotation is reversed for again extending
conveyor 99 can be suitably driven from the shaft
the die plungers relative to the die head. In con
_I92Although
which is the
in turn
molding
driven
machine
by the chain.
it hasbeen
I03.
nection with the device 33 it ‘will be. noted that
herein shown and described as having a group of
the spline connection between the hub 8‘! and the
hollow shaft ‘I9 permits thehollow shaft to move r the upper die plungers 68 on the die head39
upwardly and downwardly. with the die head 39
thereof, it will be understood, of course,,that,if
without interfering with therotation of the hol
desired this die head canbe equipped with a
low shaft by the fluid motor 99. The portions of
single die plunger instead of such a group.
the shaft ‘I8 and the rod ‘82 which extend above
that case the die head of the machine It would
the housing of the device 33 can be covered and 30 correspond with the die head shown in the modii
protected by an upright tubular extension 92 of
?ed molding machine which is hereinafter de-.
the housing '85.
-
In the actuation of thedie ‘head so by-the cyl-‘
inder 32 as described above, it may be desirable
'to stop the upward movement'of the piston 51
as soon-as the die head has been lifted high
enough above the die body 29 to accommodate
scribed. It will also be understood that suitable
control mechanism will be'provided for control:
ling the. supply of pressure ?uid to the various
cylinders and to the; rotary motor 99 so as to
produce the above described sequence of opera?
tion. In operating :the' machine I!) any desired
the transverse movement of the feed shuttle -,5I
number of the units I5 can be used and those
therebetween. This can be accomplished by pro
units,’ which are not needed can be cut outer
viding an automatic valve 93in theconnection ‘ID 40 rendered inoperative. This can be done by closing
for the upper end of the cylinder 32. This valve
appropriately located valves I04 in the ?uid‘pres-v
is adapted to be closed by a cam 93a which is
sure lines and by shifting the control lever ‘M
carried by the extension '19 of the die head 39.
of the feed‘ shuttle actuating linkage to the in
The position of the cam on its bracket 931) can be
adjusted (see Fig. 11) for different articles to be
'molded and is such that when the die head has
been lifted the desired distance this cam will
close the valve 93 thereby trapping the fluid in
the upper end of the cylinder 32 and stopping the
upward movement of the die head.
As explained above the conveying mechanism
35 provides the annular conveyor member 36
which travels in a clockwise: direction around the
group of molding units I5 and the molded articles
are kicked off of the diejbodies 29 onto this
moving conveyor member.
This conveyor mem
ber carries the molded articles to a delivery sta
tion designated 94 and shown in Fig. 8 of the
drawings. At this point of the conveying mech
anism the annular guard plate 95 is provided with
an opening 96 through which the articles can be
discharged'from the conveyor member 35 into
.a chute 9'I.
'
'
,
,
-
'
The transfer of the articles from the conveyor
operative setting.
>
>
V
i
In Figs. 11, 12 and 13 of the drawings a modie
?ed form of molding machine ‘I I0 is shown which
is similar to themachine. in but di?ers there~
from in that it has a die head equipped with'a
single die plunger and is designed for use in. mold
ing articles from a thermoplastic plastic material.
In ‘this modified machine III) the vstationary die
body I II has a single bore or die cavity I I2 there}
in and has a single lower die plunger I I3 which
extends upwardly into the bore of the diezbody
. and is actuated in the same manner-as thedie
plungers 44 of the machine Ill. The die body _I II
has a heated section II5v surrounding the lower
portion of the bore-and adapted to be heated by
a suitable heating coil I I6. The die body also in:
.cludes a cooling section I I‘! surrounding the bore
adjacent its upper end and lying above the heat,
ing section II5. A partition II 8 of-thermallin
sulating material is disposed between theheated
.and cooled sections of the die bodyg Waterpr
‘member 35 to the chute 91 is accomplished by
other cooling'liquid can be circulated through the
means of a, traveling abutment in the form of an
cooling section by means of the conduits'II9. r‘,
.endless belt 98 which extends laterally through
the opening 99 of the guard plate 95 andis lo
At a point adjacent the lower end of the heated
section M5 the die body III is provided with an
.cated so as to also extend across the conveyor
member at. a height to be ‘engaged by the ar
ticles being advanced by the latter; The belt 93
is mounted on a pair of pulleys 99a and 991), the
latter of which is driven in a clockwise direction
inlet passage-I2! whichcommunicates with the
70 die cavity I I 2 througha port I2 Ia in the side wall
thereof. Themoldable thermoplastic material is
contained in a central magazine‘ I22 which,v in
this case, is in the form of an'upright cylinder
and serves all of the molding units of the machine.
so that the portion‘ of the belt which is engaged
by the articles will tend‘ to move-the articles to .75 A head I23 provided at the lower end of the cyl
daisies
12
cider has outlet passage-s‘ m‘- ui'e‘rei‘n' for-the re;
spe'ctive molding units and which are connected
heated section until it‘
the moldabl'e material.
the ‘respective inlet passages‘ 121 by‘ the-con;
duits I125. The conduits I25; ‘the head: I23 and
lower’ portion of‘ the‘ cylinder I22 are main‘
_
g ‘
‘When thefdie‘ cavity‘ ‘I I 2 has been-thus'?lle‘d the
downward pressure on‘ the‘ die head‘v ‘I34 is‘ re
"A
in}- a heated condition by suitable‘ heating
elements‘ I26‘ eitendin'g therearou'nd.
moved or‘ decreased‘ and‘ upward‘ molding pres‘
sure‘ is applied to lower plunger‘ I I3. The‘ up
wardly‘ acting“ pressure of the plunger H 3 sub‘
__ 'I'h'e‘ thermoplastic material contained in the‘
jects- the material: to a molding‘ pressure in the
die cavity and at the same time the‘ lower plunger
magazine 122 is‘ fed or‘ injected into the‘ mold cav-i
ity [I2 through the inlet passage I2'I by'applyi'n'g'
appropriate pressure to the supply of material
contained in the magazine: For this purpose the
feed magazine is provided- with a reciprocable
plunger‘ I2‘I which can be actuated by apress‘ure
new‘ cylinder or other appropriate power‘ device
and’tthe' die head’ move‘ upwardly conjointly in
the bore ofthedie‘ body‘ H I. This upward move
ment causes the lower plunger to cut‘o'? the sup
15
(not shown). The‘ thermoplastic material is
charg‘ed'into the magazine cylinder I22 from an
annular‘ bin or container I28‘ wl'iich surrounds the
piu‘n'ger‘ ‘I211’. 'Il‘h'e material is fed‘ downwardly
from: the bin I28 intovthe cylinder I'2Z by the
the cooling‘ sect-i’o’ri- fl 1; The movement ‘or the
hold the‘ molded: article temporarily in ‘the cool
ing'secti‘ori, oi-if desired, can be such as to move
the'mol'ded' article-continuously‘ through the cool
ing; section to the top of thedie bore‘.
‘
_ _While the'article is, still" in the upper and: of
in the form of star‘ wheels which are driven in
timed relation to the movement oi’v the plunger
l‘l?'l'hb'y means‘ of the pinions 130' and_ the tracks
the'idi‘e“ bore the‘ pressure" being appliedbythe
lowe'r' plunger H3 and to the die head I'34 is re;
I‘SI cooperating therewith. The racks I'3I are
l‘ea'sed or removed and} rotary and axial move
actuated‘ simultaneously with the plunger 121.
ment is then imparted- to’th'e' upper die plunger
Each unit‘ Of'IZhe’mOHiQ?Bd molding machine’ I II]
I31 for retractingz'the threaded portion I38 ‘by
unscrewing the same from the molded article.
is] provided with‘ an upper‘ cylinder (33" which is
sinhar‘to the'uppe‘r cylinder 32 of’the machine
I07 arid: has“ a‘ die" head I34 reciprocable therein
are provided? with an’ actuating piston I35. The
ale-need; I3‘! is‘ provided’atl its lower end with
As soon as the threadedjportion of the plunger
30
a: ' new extension I3'I5 which is movable-into and
closes the upper end: of the‘die cavity H2. An
upper die plunger‘ I31
rotate-tie and axe-11y .
movable‘
the: die head 131i; so'that‘ it'can'b'e‘ prb=
iect'ea'mm and‘ 'retraced' into the hbiiew exten
sion- I 35‘. The" lowerv end of" the die plunger-‘J31
is provided with a threaded'portion 133 which is
movable-‘mm the‘ die cavity m‘ an forming the‘
threaded recess in the article being molded.
directs an air blas't' outwardly across the upper
mediately following the above described steps the
‘
lower’ plunger 'I5‘i‘3 is again movedv downwardly in
the die body and the die head I34 is also lowered
the die head m by a hollow ‘snafu I39 whose
lower end is connectedvwith the plunger by means
of"_the cooperating‘ teeth F40‘. The upper end of ~
this hollow shaft‘ is provided with a sp'line'd por
tion. which cooperates with an'actuating device
33f (see Fig. 1’) which is constructed and operates
in the manner already described above: The de
sired axial‘ movement for unscrewing the plunger
_
Although the modi?ed molding machine’ III)
has been described above with a single die cavity
it-will be understood of course that‘the die mem
bers can be provided with multiple cavities and
serves to the plunger, while it is being rotated,
by'means of the cooperating‘ threaded elements
farming a screw connection 'I’4I‘ between the
plunger's“ similar to those described above for the
machine H1.
‘
Fig; 14 shows another modi?cation of the‘ mold
in'gi' machine In which consists in the use of an
’
Irl‘i'th’e ‘operation of this‘ modi?ed molding ma
’chiiie III) 'the‘lower die plunger N33 is moved
‘downwardly in the die body _1 n_ so that its upper
‘eiidiis at a point‘ below the inlet ‘port I2 Ia. The
axe-11 length‘ of the‘ article to be molded“ The
portion of ‘the bore lying between the adjacent
ends ‘(tithe lower plunger H3 and the'iextension
1I‘36'de?'nes the die cavity. Theupper die plunger
to cause theeitension I36 to close the‘ die bore
and cooperate with" the lower plunger in again
forming a- die cavity. At" substantially the same
time the’ upper plunger I3’! is projected‘ from the
extension I36‘i'nto the die ‘cavity.
portion I 38lfro‘m the molded article can be im
‘extension [36 thereof to enter the .diecaVi'ty'I‘IZ
and! exten’diinto' the bor'ethereof to a point’ some
what above the port‘ It2I‘a dependinglupon the
hasbeeri ‘thus unscrewed from the article the
die head is moved to‘ its fully elevated position
and the lowerlplunger I I3 is moved further up
wardly to‘ lift the‘mold'ed- article out‘ of the bore
of the die body “I. The molded article is then
kicked from the top of the die body so as‘ to
be transferred _to the annular member 36 ‘of. the
conveying mechanism 35. This is accomplished
by suitablemea'ns such as the air jet I43 which
end ofthe dieubod'y l I I as shown in Fig. 11'. Im
The die pmng'er I31‘ is adapted tofbe rotated in
die‘ head'YI3‘4 is "moved downwardly causing the
ply passage I'2I by covering the inlet port IZIa.
This movement also causes the‘ molde‘d'article to
be carried out of theheated section I I5 and into‘
lower plungervan’d the die head can be such ast'o
metering devices I 29‘. These inetering devices are
plunger and die head.
been“ filled with
insert‘ or‘ ?ller H5 in the feed shuttles '5]. The
insert I 45 serves as a metering‘ means for meas
50
uring" the amount of moldable material which is
to be" ‘supplied to a die cavity‘ which has been
selected for a ‘particular article to be molded.
The insert I45 is‘her'e shown as having a single
feed or metering chamber I46 therein but, if de
‘sired, this‘ insert can have a plurality of‘ such
chambers’to' correspond with a grouped arrange
ment of die" cavities.
From the‘ foregoing description and the ‘accom
tension‘ I315} so as tolbe disposed in. the proper re
panying drawings it will now be readily under
stood ‘that the present‘ invention‘ provides im
through the inlet passage- 121' under'the' pressure
eppuea to the‘ material by’ the feed plunger I21.
article's.
I53’! is‘ then; extended orvprojected from the'ex
lati'ori in the ‘die cavity. Heated’ material is then 70 proved plastic molding machines of the multiple
unit type which‘ can be used for rapidly ‘and eco
inject d’int'o the die cavity from the cylinder I22
?fétth-lsltimei the die cavity‘ is lying in‘ the heated
section H5 or the 'die body In and remains in
nomically producing various forms of molded
Although the improved5 molding machines have
been illustrated and described? herein‘ in" consid
2,514,486"
13
14.
erable detail, it will be understood of course, that
between ‘said magazine and the individual die‘
bodies for transferring charges of said material
the invention is not tobe regarded as being cor
to said mold cavities, and means for actuating
respondingly limited but includes all changes and
said shuttles, said feed shuttles comprising slides
modi?cations coming within the scope of the ap
C1 having material-receiving openings therein adjapended claims.
cent their outer ends and being movable to a‘
Having thus described my invention, I claim:
discharge position over the mold cavities vfor
1. In a molding machine of the character de
feeding said material to the latter and the shut
scribed, an endless group of stationary die bodies
tle actuating means having. operative connection
each having a mold cavity therein adapted to
with the individual shuttles at points inwardly
receive moldable material, means movable rela
of said openings.
tive to the respective die bodies for subjecting
5. In a molding machine of the character de- '
moldable material to pressure in the mold cavi
ties, a magazine located substantially centrally
scribed, an annular group of ‘stationary die"
bodies each having a mold cavity therein adapted
of the group of die bodies and adapted to con
tain a supply of said moldable material, and 15 to receive moldable material, means movable rel
means for feeding the material from the maga
ative to the respective die bodies for subject
zine to the mold cavities comprising a separate
ing moldable material to pressure in the mold
feed shuttle for each die body and such shuttles
cavities, a ‘magazine located substantially cen
being movable back and forth between said mag
trally of the group of die bodies and adapted to
azine and the respective die bodies of said group
contain a supply of said moldable-material, an
and operating means for imparting such move~
annular group of feed shuttles disposed in sub‘
ment to said shuttles.
stantially coaxial relation to said group of die
2. In a molding machine of the character de
bodies and comprising one such shuttle for each
scribed, an endless group of stationary die bodies
diebody, said shuttles being movable back and
each having a mold cavity therein adapted to
forth between said magazine and said die bodies
for transferring charges of said material to said
receive moldable materialrrneans movable rela
tive to the respective die bodies for subjecting
mold cavities, a common actuator located sub
moldable material to pressure in the mold cavi“
stantially centrally of said group of feed shuttles,
ties, a magazine located substantially centrally
means for moving said actuator, and means con
of the group of die bodies and adapted to con
necting the respective‘feed shuttles‘ with said
tain a supply of said moldable material, means
common actuator and enabling the latter to ac-,
for feeding the material from said magazine to
tuate all of said shuttles simultaneously.
the die cavities comprising a separate feed shuttle
6. In a molding machine of the character de
for each die body and such shuttles being mova
scribed, an annular group of stationary ,die
ble back and forth between said magazine and 85, bodies each having a mold cavity thereinadapted
the respective die bodies of said group and oper
to receive moldable material, means movable rel
ating means for imparting such movement to
ative to the respective die bodies for subjecting
said shuttles, and conveying means disposed
moldable material to pressure in'the mold cavi
around said group and having a movable car
ties, a magazine located? inside the group of die
rier adapted to receive molded articles from said 40 bodies» and adapted‘to ‘contain a supply of said
die bodies and to carry the articles to a delivery
moldable material, feed shuttles movable be
station.
tween said magazine and said die bodies for
3. In a molding machine of the character de
transferring charges of ' said material to said
scribed, an endless group of stationary die bodies
mold cavities, an annular rack located inside
each having a mold cavity therein adapted to 45 said group and‘ adapted for axial movement,
receive moldable material, means movable rela
means for moving said-rack, and linkages con—'
tive to the respective die bodies for subjecting
necting the respective feed shuttles with said
moldable material to pressure in the mold cavi
rack and including toothed members having‘
ties, a magazine located substantially centrally of
meshing engagement with the rack.
the group of die bodies and adapted to contain 50
7. In a molding machine of the character de
a» supply of said moldable material, an endless
scribed, av group of stationary die bodies each
group of feed shuttles disposed in substantially
having a, mold cavity therein adapted to receive
coaxial relation to said group of die bodies and
moldable material, means movable relative to
comprising one such shuttle for each die body,
the respective die bodies for subjecting moldable
said shuttles being reciprocably movable substan 65 material to pressure in the mold cavities, a mag
tially radially of said group of die bodies in a
azine located adjacent the group of die bodies
back and forth travel between said magazine and
and adapted to contain a supply of said moldable
the individual die bodies for transferring charges
material, a feed shuttle 'for each die body and
of said material to said mold cavities, and means
such feed shuttles ‘being movable between said
for actuating said shuttles.
.
60 magazine and the individual die bodies for
4. In a molding machine of the character de
transferring charges of said material to said
scribed, a substantially circular group of sta
mold cavities, a common actuator located adja
tionary die bodies each having a mold cavity
cent said group, means for moving said actua
therein adapted to receive moldable material,
tor, linkages connecting the respective feed shut
means movable relative to the respective die 65 tles with said common actuator, and means for
bodies for subjecting moldable material to pres
rendering said linkages individually effective or
sure in the mold cavities, a magazine located
ineffective.
substantially centrally of the group of die bodies
8. In a molding machine of the character de
and adapted to contain a supply of said mold
scribed, an annular group of stationary die
able material, an endless group of feed shuttles 70 bodies each having a bore therein, a pair of sub
disposed in substantially coaxial relation to said
stantially aligned die plungers movable in each
group of die bodies and comprising one such
bore from opposite directions with their adjacent
shuttle for each die body, said shuttles being re
ends in spaced relation so as to de?ne a die
ciprocably movable substantially radially of said
cavity in a portion of the bore, a pair of ?uid
group of die bodies in a back and forth travel 75 pressure cylinders located on opposite sides of
$514,486
15
16
each fdi'eibody and having pistons roperable there
and :spaced 'i'romisaid die body, a die-‘head mov
in and :connected ‘with the die plungers ‘for ac
of said moldable material, an annular group of
able‘relative to said die body for closing and-open
ing said die cavity and having a portion ‘thereof
reciprocable in said cylinder and forming a pis
ton therein, a plunger carried by said die head
and havingaportion movable into said cavity and
adapted to shape a ‘portion of ‘the article being
molded, saidv plunger being mounted for move
feedshuttles disposed in‘ substantially coaxial
ment in said die head and relative .to said die
relation‘ to said group of die bodies and com
prising one such shuttle for each die ‘body, said
body for disengaging the plunger from the ‘molded.
article, a shaft extending into said cylinder and
die head and ‘having operative connection with
said plunger for imparting the-disengaging move
ment to the latter, said-shaft being movable ax
tuating ‘the latter, ‘ said plungers being 'relatively
movable in the bores- for subjecting moldable
material to pressure [in the die ‘cavities, -a maga
zine .located‘substantially centrally vof the group
of die bodies and adapted ‘to ‘contain a supply
5
shuttles being movable ‘back andforth between
said magazine :and said die bodies ‘for transfer
ring ‘charges of saidmaterial to'said'die cavities,
and‘ means “for actuating ‘said shuttles compris 15 ially thereof vwith said die head, a power device
on said frame, and means forming a spline con
ing atcommon actuating means located substan
nection betweensaid shaft and power ‘device.
tially on the axis of ‘the shuttle group and
12. A molding machine of the character de
adaptedto ‘actuate all of said shuttles simul
taneously.
'
scribed comprising, a'frame, a stationary die body
9. .In ta molding machine of ‘the character de 20 on said frame and having a die cavity therein,
means for supplying moldable _material to said
scribed, an annular ‘group of stationary die
die cavity, a pressure ?uid cylinder onsaid frame
bodieseach having a; bore ithereima pair of sub"
and spaced from said die body, a die head'mov
stantiallyaligned die plungers movable in each
able relative to said die body for closing and open
bore from opposite directions with their adja
cent'ends‘in spaced relationso as to de?ne a die 25 ing said die cavity, a piston reciprocable in said
cylinder and connected with said die head, a
cavity ‘in a portion :of ‘the ‘bore, a pair of ?uid
plunger carried by said die head and having a
pressure‘ cylinders Ilocated on opposite sides of
portion 'movable'into said cavity and adapted'to
shape a portionof the article being molded, said
tuating ‘the :latter, :said 'plun'gers being relatively 30 plunger being mounted for rotary and axial move
ment in said die head and relative to said die
movable in 'the bores ‘for subjecting "moldable
body'for disengaging’the plunger'from themolded
materialto ipressurei-in the die cavities, a mag
azine‘located‘substantially“centrally of the group
article, a rotary shaft extending ‘into said die
head and‘ operably connected'with said plunger
of‘zdieibodi‘esvand adapted to contain a-supply
ofsaid .moldableimateri'al, an annular group of 85 for imparting said rotary ‘movement ‘thereto, co
each dieEbody and having ‘pistons ‘operable there
inrand'iconnected ‘with the die plungers for ac
feed 's'huttles .dis-posed'in substantially coaxial
operating screw elements on said die head and
relation ;to "said group ‘of die bodies and com
prising one such shuttle for ‘each die body, said
plunger .for ‘producing said axial movement of
the plunger, said shaft being movable axially
shuttles-being movable ’ back ‘and forth between
thereof with said die head, a power device on
said frame, and means forming a spline connec
tion'between saidshaft and power device.
13. A molding machine of the character de
said magazine andsaid die bodies for transfer
ring charges-‘ofrsaid‘material tosa'id die cavities,
and means for actuating said shuttles compris
inga common actuating means locatedlsubstan
tially on the axis of the ‘shuttle group and
scribed comprising, a'frame, a stationary die-body
on said frame and having a die cavity therein,
adapted to‘actuate all of l'the'feed-shuttles simul 45 means for supplying moldable material to said
die cavity,'a pressure ‘?uid cylinder on said frame
taneously, said‘ feed shuttles comprising slides
and spaced from said die body, a die head mov
having material-receiving openings therein and
able relative to said dieibody for‘closing and open
being ‘movable to a discharge‘position over the
ing said die ‘cavity and having a portion thereof
die cavities for feeding 'saidmaterial ‘to the
latter.
50 reciprocable in said cylinder and forming a pis—
ton therein, a plunger carried by said die head
:10. A molding machine of ‘the character de
scribed comprising, a frame, a stationary die
body on said frame and having a die cavity
therein, means for supplying moldable material
to said die cavity, a die head movable relative 55
and having a portion movable into said cavity and
adapted to shape a portion of the'article being
molded‘, said plunger being mounted ‘for rotary
and axial movement/in saiddie head and relative
to said die‘body for disengaging the'plunger from
the molded article, a rotary shaft extending into
said die ‘head and 'operablyconnected with said
plunger for imparting said rotary movement
to said die body'for closing and opening said die
cavity, a plunger carried 'by‘salid die ‘head and
having‘a portion movable ‘into said cavity and
adapted'to shape a portion ofthe article being
molded;?means ‘for'actuating'said die head, said 60 thereto, cooperating screw elements on said die
head and plunger for producing said axial move
plunger being mounted for movement in said
ment of the plunger, said shaft being movable
die ihea‘dand relative‘to sa'id'die body for dis
axially thereof with said die head, a power device
engaging the plunger ‘from ‘the ‘article ‘being
onsaid frame, and means forming'a spline con?
molded, and ‘means for imparting a relatively
sudden ‘disengaging movement to said plunger 65 nection betwcenisaid'shait‘and power device.
14. A molding machine or the character de
including a, rotary shaft projecting from the die
scribed comprising, a frame, a stationary die body
on said "frame and having bores providing a group
tary power device vmounted on said frame and
of die cavities therein, means‘for supplying mold
having a lost~motion driving connection with
70 able material to said die cavities, a pressure ?uid
said'shaft.
cylinder on said frame and spaced from one side
11. A molding‘ machine. of the "character de
of said die'body, a-die'head movable relative to
scribed'comprising, a frame,,a stationary die body
said die body for closing and opening said die
on said frame and having a die cavity therein,
cavities, a piston reciprocable in said cylinder
means for supplying moldable material to said
die cavity, a pressure‘fluid‘cylinder'on sai‘d‘frame
and connected with‘said die head, a ?rst group
head and axially movable therewith and a ro
2,514,486
18
17
hub, and means forming a-spline connection be
of plungers carried by said die head and having
portions movable into the respective ‘die cavities
from one end of said bores and adapted to shape
portions of the'articles being molded, said ?rst
plungers being mounted for movement in said
tween said shaft and hub.
17. In a molding machine of the character de
scribed, a frame, a stationary die body on said
frame and having a die cavity therein, means for
supplying moldable material to said die cavity, a
pressure ?uid cylinder on said frame and spaced
from said die body, a die head movable relative
die head and relative to the die body for disen
gaging said ?rst plungers from the molded arti
cles, a second group of plungers extending into
‘said bores from the one end thereof and cooper
ating with the ?rst plungers in forming said die
cavities and in subjecting said material to mold
to said die body for closing and opening said die
‘cavity, a piston reciprocable in said cylinder and
ing ‘pressure, a rotary shaft extending into said
diev head and having operative connection with
said ‘?rst plungers for imparting the disengag
ling; movement to the latter simultaneously, said 15
second plungers being also movable in said bores
for expelling the molded articles from said cav
ities, a second power cylinder on the other side
of said die body, a piston operable in said second
power cylinder and connected with said second
plungers, said shaft being movable axially there
connected with said die head, a plunger carried
by said die head and having a portion movable
into said cavity and adapted to shape a portion
of the article being molded, said plunger being
mounted for rotary and axial movement in- said
die head and relative to said die body for disen
gaging the plunger from the molded article, a
rotary shaft extending into said die head and op
erably connected with said plunger for imparting
20 said rotary movement thereto, cooperating screw
elements on said die head and plunger for pro
ducing said axial. movement of the plunger, a
‘power device on said frame comprising a rotat
frame, and means forming a spline connection
able hub and a motor for driving said hub, said
between said shaft and power device.
15. A molding machine of the character de 25 shaft being movable axially thereof with said die
head and extending through said hub, means
scribed comprising, a frame, a stationary die body
forming a spline connection between said shaft
on said frame and having a group of die cavities
and hub, and means forming a lost-motion driv
therein, means for supplying moldable material
ing connection between said motor and hub and
to said die cavities, a pressure ?uid cylinder on
said frame and spaced from said die body, a die 30 enabling said hub to impart a sudden rotary
‘ movement to said shaft.
head movable relative to said die body for clos
18. In a molding machine of the character de
ing and opening said die cavities, a piston recip
scribed, a frame, an annular group of die bodies
rocable in said cylinder and connected with said
on said frame and each having a bore therein
die head, a group of plungers carried by said die
head and having portions movable into the re- " providing a die cavity adapted to receive mold
able material, an annular group of power cylin
spective die cavities and adapted to shape por
of with said die head, a power device on said
tions of the articles being molded, said plungers
being mounted for rotary and axial movement in
said die head and relative to the die body for dis
engaging the plungers from the molded articles,
a shaft extending into said cylinder and die head,
said shaft being movable axially thereof with said
die head, gears connected with said plungers and
ders on said frame at one side of said group of
die bodies and providing one such cylinder for
each die body, a second annular group of power
Mi cylinders on said frame at the other side of said
die bodies and also providing one such cylinder
for each die body, pistons operable in the power
cylinders of such annular groups, plunger means
connected with the pistons of the ?rst annular
disposed in a group in said die head, a driving
pinion on said shaft and meshing with the 45 group of cylinders and movable into the bores of
said die bodies from one end and having portions
grouped gears for imparting said rotary move
adapted to shape portions of the articles being
ment to the plungers, cooperating screw elements
molded, plunger means connected with the pis
on said plungers and die head for imparting said
tons of the second annular group of cylinders and
axial movement to the plungers, a power device
on said frame, and means forming a spline con— 50 movable into said bores from the other end for
cooperation with the ?rst plunger means in sub
nection between said shaft and power device.
jecting said material to molding pressure and be
16. In a molding machine of the character de
ing also movable in said bores for expelling the
scribed, a frame, a stationary die body on said
molded articles therefrom, a magazine located
frame and having a die cavity therein, means
substantially centrally of said group of die bodies
for supplying moldable material to said die cav
and adapted to contain a supply of said moldable
ity, a pressure ?uid cylinder on said frame and
material, a feed shuttle for each die body and be
spaced from said die body, a die head movable
ing ‘movable back and forth between said maga
zine and die body for supplying moldable mate
inder and connected with said die head, a plunger 60 rial to the die cavity of the latter, and a common
actuating means for all of the feed shuttles.
carried by said die head and having a portion
19. In a molding machine of the character de
movable into said cavity and adapted to shape
scribed, a frame, an annular group of die bodies
a portion of the article being molded, said plung
on said frame and each having a bore therein
er being mounted for rotary and axial movement
in said die head and relative to said die body for 65 providing a die cavity adapted to receive mold
able material, an annular group of power cylin
disengaging the plunger from the molded article.
ders on said frame at one side of said group of
a rotary shaft extending into said die head and
die bodies and providing one such cylinder for
operably connected with said plunger for im
each die body, a second annular group of power
parting said rotary movement thereto, cooperat
ing screw elements on said die head and plunger 70 cylinders on said frame at the other side of said
die bodies and also providing one such cylinder
for producing said axial movement of the plung
for each die body, pistons operable in the power
er, a power device on said frame comprising a
cylinders of such annular groups, an annular
rotatable hub and a motor adapted to drive the
group of die heads on said one side of said die
same, said shaft being movable axially thereof
with said die head and extending through said 75 bodies and connected with the pistons of the ?rst
relative to said die body for closing and opening
said die cavity, a piston recibrocable in said cyl
2,514,486
19
annular .group of cylinders, plunger means car
ried by said die heads and movable into the bores
of said die bodies from one end and having por
20
shuttle for each die body and being movable back
and forth between said magazine and die body
for supplying moldable material to the die cavity
tions adapted to shape portions of the articles
of the latter, and a common actuating means for
being molded, plunger means connected with the
the feed shuttles.
pistons of the second annular group of cylinders
LEE B. ‘GREEN.
and movable into said bores from the other end
for cooperation with the ?rst plunger means in
REFERENCES CITED
subjecting said material to molding pressure and
The following references are of record in the
being also movable in said bores for expelling the 10 ?le of this patent‘:
molded articles therefrom, the plunger means of
v UNITED STATES PATENTS
said die heads being mounted therein for rotary
and axial movement for disengaging the plung
Number
Name
Date
ers from the molded articles, rotary shafts ex
2,212,483
Soubier _______ “7-- Aug. 20, 1940
tending into the respective die heads, means in 15 2,218,456
Soubier _______ __,___ Oct. 15, 1940
said die heads and adapted to be driven by said
2,228,614
Soubier _______ _,___ Jan. 14, 1941
rotary shafts for causing said rotary and axial
2,306,205
Crosman __________,__ Dec. 22, 1942
movement to be imparted to said ?rst plunger
2,326,382
Moreland ___________ Aug. 10, 1943
means, said shafts being movable axially thereof
2,363,808
Sayre __________ __,__ Nov. 28, 19451
with said die heads, an annular group of power 20
FOREIGN PATENTS
devices on said frame, means forming spline con
Number
Country
Date
nections between said shafts and said power de
696,643
Germany _____ ____ __ Sept. v26, 1940
vices, a magazine located substantially centrally
3,810
Great Britain _2__,_ Mar. 24, 11885
of said group of die bodies and adapted to con
tain a supply of said moldable material, a feed 25