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Патент USA US2412299

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Dec. l0, 1946.
-
H. SNOW
2,412,299 `
‘
MOLDING PRESS
~
Filed Nov. 21,- 1942
,
IIsmaentor:
_Howardá'nalfô
81;
ê
l
I
.
g: ~
I
(Ittorneg,
-
Patented Dec. 10, 1946
V2,412,299
UNITED STATES PATENT "OFFICE
` 2,412,299
MOLDING PnEss
Howard Snow, Charlotte, N. C., vassigner `>to
y(Southern Friction Materials Company, a corpo'
ration of North Carolina` "
'
"
' `
applicati@ November 21, 194g, >serial Np. >466,501
’7 Claims. (Cl. 18-9)
1
.
This invention relates tothe manufacture of
fibrous composition products. It has to do more
particularly with brake linings, but the manu
42.
pressiontakes place on the material of which .the
product is made; and,
,
'
Fig. 5 is a fragmentary sectional view illus,
trating a provision for varying the width> of the
factured material maybe .used lfor various other
purposes, e. g., clutch facings, gasket sheeting, 5
product
Referring
strip.now to the drawing
` `
in detail, the
shim and washer stock, etc. Such products are
usually .made from a mixture of a ñbrous ñller
numeral I0 vdesignates an upright supporting
or base constituent, such as asbestos and the
frame, comprising the vertical side membe'is;l'.fl,
like, with an organic binder, and the fibrous ma
top cross member I2, bottom cross member {lf3}
terial being interfelted with Íthe binding ingre
dient distributed therethrough and compressed
with integral base footing ._Ili, and _an intere'
mediate cross member I5. This frame maybe
therewith in the course of manufacture.
either an integral casting or a built-up structure,
lThe Vpresent invention resides .in a rotaryûpress
designed to improve .the quality andat >the same
time increase the speedyet minimize the cost of
as preferred.
15
manufacture of _the above Vmentiçnîied products.
low fangle of compression »and apply >a continu
other solidbase by bolts or lag screwsfIdA Vas
indicated- in Figs. 1 and „2. So, too, the `press
structure now to be rdescribed may be mounted
on any other-stable support in lieu of the v.said
nitude >on the material, Without' disturbing the
lay of the fibers whereby to .attain an idealin
'
l "
frame 1.0.»
Another feature is a means Vfor varying lthe
thickness of the compressed product. Provision
25
is also made for varying lthe width of the prod
uct.
`Still another feature is the adaptability of the
press in a controll of -feed ofthe constituent ma
terial thereto inV a rway to vary .the density of
the product.
’
_
'
HI
`
Ü
40
'
t
'
detached from the press;
"
`
y
Eis. 4 v.is va .fragmentary .View ,of `c,ormeratim;
portions of. the outer .ring >.member »_ and „the rotor
`
'
the ,flat „outer face _ofthe hub member'llßand
it is held in place on .thestub Vshaft 2,2¿by x_jam
ì
:,Fig. ,3 isa front face view of the `hub member
of a headed axle pin, >is inserted from the reary
of the hub member 4(seeFig'. _254. Mounted ¿ freer
ly rotatable on this stub shaft >.22 4is, aprot’o?lQZB
in the form of a flat, `~circular, disk having :a:
As shown in Fig. 2, the rotor 23 directly abuts
Fig. .2 is _a section taken., onor about the line
2-Í-,2,of Fig. »1; '
'
of the .Seme number leed angular >Poésiriß‘rîl ¿5S
the holes wir 'the portion =~I1 (Seeheim: „In
«mee these bores,esubero-21min@ #sin
45 prem, cynndn'cai, 4ci,rcmrnferentìa1 face; `
Fig. 1 is a View infront elevation withportion‘s
broken away rand in Lsectionto show certain .in
terior features;
` A
ber I6 is provided ywith a plurality Of bores ,2L
A practical adaptation ofthe invention is set
forth in the following detailed description in con
'
is cylindrical. The hub .memberÍ Iii is provided
et the Vrear thereof with er1 annular ñeneßeh?
collar Il. The part `I‘I is apertured inannular
series as at rI8 _(see Fig. 3). These `apertures
are `for the reception of bolts `I9 that'îare 1n-v
The _cylindrical body portionof the hub merg
v
panying drawing, in which:
`
thus located are `ffifsflßellefïJOY,321.111.nuts .20 lfïëee
into strips or sheets for ~subsequent calendering
nection with the construction and arrangement
of a rotary press as illustrated in the accom
" '
hub memberlß, the main body portion 'of which
Figsland 2).
`
3. Calendering previously formed masses.
'
opposed portions of the frame IIJ. Thebolts'flS
2. Preforming, either cold or hot, fibrous masses
or pressing.
~
Y{I'he illustrated press r`structure comprises a
Sverbed in .registered _apertures .Pivovìdèd .-1.11 the
`
Without limitation thereto, the .press `of the
present invention is yprimarily intended ,and
adapted for vthe following particular uses:
1. compressing fibrous masses, into a strip or
sheet.
'
said footing _I4 may be Ífastened to a ¿door or
ousgradually increasing, pressure of greaty mag
`
' '
press
the weight
carriedofthe
thereon
laterally
as presentlydescribed,
>offset Íparts of>
A feature of .this yinvention is Van arrangement
of small internal rolls that provide a markedly
terfelting of the same inthe product.
"
The base footing I4 may-be made heavy enough
to keep the frame I 0 from toppling over under
50
nuts 24 applied on the reduced, screw-threaded,
protruding end> portion` of the> shaft, with l.waîs'hers>
25, 26, interposed between the nuts and thelad.
jacent outerface portion of thetrotor.
'
' '
`In the illustrative structure, the bore .of the
rotor 23 its fitted ,rather` tightly but _, freely _'roL
i'n‘íthe' Aregion A.where .the .initial andjiinal Yc0111 55 tatable. `on . the stub' shaft 22; but,` advantageously,
3a suitable anti-friction bearing (not shown) may
be provided.
Vfrom this angle, up and down, vary the densityV Y '
of the product, as described.
The minimum compression space, yet maxi- ì,
~
Inasmuch as the axis of the thus mounted rotor
i23 is located radially away from the center of
`the hub member I6, it rotates eccentricaily with
respect to the hub member and also to an outer
mum pressure attained, is directly vertical be- '
Env
low the axis of the rotor23, as designated at 4I
(see Fig. 4). This governs the thickness of the
productyldesignated at II2.,¿ The. spaceAI may beV
ring member 21 rotatable concentricallyV .on the
`same hub member, Vaswill now be„described'„
varied as will be later described.
~ f =
The ring member 21 being in motion and ro
The ring member 21 has a hub portion 28
provided with a smooth cylindrical bore that is 10 tating clockwise as above stated, and also by
the wedging effect of the interposed material 39
`fitted rotatably on the cylindrical body portion
- in -the tapered space between the rotor 23 and
`of the hub member I6 as at 29 (see Fig. 2).
ring member 21, the rotor is thereby Vcaused to
rotate 'also'in the clockwise direction. As the
with the stub shaft 22 and the rotorÀ 23, the> fitting of the ring member vhub portion 28 fto '
'ring member >and rotor Ythus rotate, the inter-~
rotate on the` hub member I6 maybe either
posed material isvcarried with said elements, so '
solely by'accurate surfacing ofthe fitted parts>
that a comparatively slow yet continuous flow of
or Vby the obvious provision of an antiiîrictionv
bearing between the 'parts (not shown). «_
_the
slow material
and gradually
is caused,
increasing
with a pressure
correspondingly`
without
eddy
currents
or
back
flow.
VThis
is
advanta
cross` section, is formed in the ring member 2,1. 20
geously effective in gradually compacting the ma
The' lower peripheral portion of the rotor Y23
terial from its original loose bulk, as fed into
travels within the adjacent lower portion of v`this
the press, to its'ultimately compressed product
channel.` but spaced from theV bottom thereof.
thickness, without lamination Ybut with an ideal
The minimum space between the opposed periph
"
I ~ '
eral faces of the rotor and the ,channel governs 25 interfelting of the material.
' By the relative diameters of the Vring channel
the ultimate compression and Vthickness of the
bottom and the perimeter of the rotor the speed ï
product. The width of the channelis but slight
of travel of said portions is substantially the
Ílygr'eater than the thickness of the rotor so that
same. Hence, the material is carried therebe
the kopposed cooperative `face portions of the
tween with varying radial pressure but uniform
?otor and side wall faces of the channel are close
longitudinal travel of the mass. This continues
to eachV other and they function as a continuous
fromrthe time of its loose bulk condition as the ‘
positive mold. The width of the channel deter
An internal, annular channel 30, of rectangular
mines the width of the product.
material initially enters the upper compression
‘
space between the rotor and outer ring member~
until it emerges from betweenV the 'narrowestîh f
space of ñnal compression 4I asa finished prod-v
uct. Thus, there isV no excess lengthwise dis
placement by pull or push of the material ad'-v
jacent either the rotor or outer Vring channel.`r
y, Ana'nnular series of gear teeth 3| _are either
formed'udirectly or otherwise provided on the
circumierenceA of the ring member 21. These
teeth _mesh with the teethof'a driving pinion
32 which is secured on a power shaft 33. Thisl
Íshaft, „as shown', is journalled in a bearingpor
tioníifl4 ofthe bottom cross member I3 of the 40 Hence, Ythe original liber distributionin the mass'
remains undisturbed except as,l to compressionl
,frameV Illand an outer bearing 34A on an ex
radially with respect to thaa'xis ofthe rotor23, Y
tension of the footing I4.- The shaft is providedV
and this is gradual. The result of this so> con
at itsinner end _with a worm wheel 35. The
trolled action is that lamination> or V4separate
wormjwheel 35'Íis driven >by a worm-screw Y38
layer formation in the iinished'product is avoid
fixed‘ori the varmature"shaft 31j ofv an electric
_motor 38 thatfis mounted-_on the footing I4.
ed. Therefore, in theïresultant product there is Y"
an ideal interlocking and felting of the fibers
in the product as well as a thorough compacting
Other >conventional'meansv for rotating the ring'r
member 21 at a comparatively slow speed may
of the?commingled binding ingredient therewith.`
`beîsubstituted for that shown; AnV ideal speed'of
ifing rotation for the purposes ofthe present in 50 The loose bulk material 39 may vbe Yfed con-A
tinuously into the press through a suitableY stand
:vention-is’ßyR. P.
with a ‘rotor
ard` vibrating` hopper lfeederof the choke*feeder` .
approximately three feet.
y
- type» @s indicated. CQQl/Íentîçmany lat 43 (Seê-Eîgëf l
`~ -In the operation of - the press >the >outer` ringV
1 andj2) ,Y capable ofmaintainingaY definitejle'ifvfel1 '
member 21 is rotated under power-as above „deof
the loose material in the receiving space.; iBy '
55
scribed. _ AThe rotorY _23A is rotated in the `same
b
`
"
b
'
diameter
-of
direction _and at theY same peripherall speed by
adjustment of ,suchV afdevice the Y»level Yof the'
material fed into thepress may'beraisedtoin;V
the_»_rin_g member 21 and rotor 23 is clockwise,
crease or lowered to decrease'density ofthe prodev
uct. So, too,_ the flowuintcA the, press maygbey fur-ther regulated by anyfconventional means @(not `
shown) but preferably a „suitable mixing-device
the interposition "of the yconstituenty material ofy f
which theproduct is made.
the rotation'of
whenjviewing the press from the front asV in
IFig. "1, vthe `constituent material, designated by
60
the 'numeral 3,9, is fed into the upper space 40 atA
that Vmakes the mass Yof'mixed >constituent,Qin-f
the'right, betweenjthel rotor and ring member,
q iiulfed material is supplied to thev s_.fcresaidfeed#VV
Ywhence.itjffalls into thebdownwardly tapering
spa/ce1 below.,d
"
'
.
f
`
>
gradientsY loose- and ñuffy, from4 whichv device'?the
er 43. The proportionate supply oflthe'maiìlërial@
65
will be governedaccording to A_the speedofrçtaï,` .e
Y
. “_The extent of compression and resultant; den-j_
tion-ofthe Vouter ring member 21~and tl‘ievrcto/r` Y. '
sityf‘oj the product is governed by theproportion`-`Ã
:23.
ate'f‘quanti'tyof the constituent materialffedinto
Y
,
y
'r
12;@
' AnyY suitable meansV for stripping and remove; g
thef‘space between the rotor 23 and'outer ring 70 ingthe product may be provided forfthepurpose.
member 21.- Under usual operatingconditions,
As shown (see Figs. r1 and ,2) _thestrippciï'.cQIIl-Y` '
the, loose material 'will be'supplied in anlamountJ Y
prises a blade 44, which may,bemQreorlcSsresil-j
ij_ust ,sufficient toy ñll the ,lower tapere‘dfspacelup
ient, and eurved'so thatitssharpened end dien-fg. n ' '
` toiä'a `ylevelgtnat _is approxinnatelyT iat, an angle; 'ofi
45°'from‘the'axis'of the‘rotor' 23:" Variations-
. gages `.the„._bottom` „of rthe?rìllgÄ'lcharillßìl.I
75
f_. „_
thereby shaves vther adhering ¿product èfrom fth‘e‘- s p
` Vlfaite-l tettoia.
curvature-pitite natie it
,is alfsd‘s‘ucli that it cceperateS-'itith the innerend.
'pertidagae di adcwnwardly inclined `»discharge
chiite "41 so as te ì eend Y'and Vdeliver the precinct
Without creating llnd'uestresses thereon er other
-’vvis'e‘ detracting from its tensile strength. `
vAs shown, the stripper blade lill is mounted on
rebent bracket 48, one "end portion ’£3 of Which
is projected inte the larger open >Space between
the cuter ring niemeer '2i and the reter 23 and
thile- 'cantesl _said blade. The apposite _angular
end p_crticnj‘dn or the bracket es ispclted er other~
fthe‘ring
finies' in 52
_tlie'autei
may be unfastened'anfd
fing" memteièn.'rotated‘within
¿this
'the' outer ring kmember vv2l and ‘moved laterally
inward or outward until the proper-bolt-holesgare
Abrought into registration Vfor ythe 'reception "of
the bolts 513, so as to again fasten the ring’f52nï in
place for a different Width ofthe fchannelfBD.
With this provision :for adjustment ofthe-ring
52 to vary the Width of the 'channeljäil _a number
of interchangeable rotors '23 of correspondingly
different thicknesses are, oi course, provided.'
`Instead `of >using the ring 52 'andïbclts'53,"any
"other, conventional' provision suitable for ’adj ust
`of ythe supporting fraln'e'lfû, as at '5 l.
The inner ‘eiid c'f the discharge 'chute '41, of
¿curseurs 'le'cated within the 4said fupper 'space
ing the'outer-si‘de'vvall ‘of the 'ring channel jin'
yvv'ar'd 'and "outward may be incorporated inthe
rin‘g structure.
'
’
' j
cf the ‘press te cooperate' iti‘ththe 'stripper blad-e
If `a wirerne‘sh or other vfabricbacking“is de
_ 44 ~s'o as_to receivéthe product ‘as it is ushaved"and
sired fora brake lining 'or pth'erpro'duc't or "the
press, astrip `of the backing 'material' may bëffed
into the press ‘with the hereinbefore described
lifted 'from _the 'channel et. The Ychiite '4i is
turned out ‘of theäspace in 'the press so as to"de-
liver‘rthe' detached product int‘ó >sortie suitable ‘re
‘ce'iving receptacle, reel 'or utility (not shown) . l
Afs before stated, the l?ninim'um compression
Íspace and maximum 'pressure is attained Ídirectly
‘y constituent material,- either vbetween tliefsaidirn'a
te'l‘íail and 'the períphël'al'facë Yt’ïftl'le I'Ö’DOI" Ol‘hbe'
tween `the material and ‘the 'bottom of euterr'ing
channel. This may be accomplished by ‘hand _or
an ‘operator 'or by 'some "suitable "mechanical
means, not shown.
vertically so as to vary the space'd'l, 'the Vrötói-"23
îand lthe outerV ring member 2l -are ‘removed from
A
y
4
While the location ’of the eccentric a'xis of ¿the
the hub memberv l 6. The aXlepin or ‘stub shaft 22
is thenreffiòvedfrem ‘the here `2| ef’th'e hup 'mem
rotor 23 directly Avertical"bel'o‘W the azîis'ïo'f'ïthe
hub Vr'neinber le in the construction and arrange
nient of l.press illustrated is practical )for Iri'o'sft
bera'rid inserted in 'one ‘of the 'other bores 2i ’that
purposes of the present ïinventivefidea, Ítheaangu
i'S either closer’to or farthe'r'from the center' of
larity `'may be vchanged .to either side `of the ver
ticalplane. So, too, other changes and '-_rnodi‘ii
cations in the general structure vare contemplated
vthe hub, 'asthe case 'rnay be, depending lupon the
`desired thickness in which the's'trip of "product
"E2 is to be made.
After 'thechaiig'e >iii location of the aine‘piii' ci»
stu-tenait artificialmente zu are remcv‘ed‘frem
>Within the ,scopeo'fl the appended claims. „'¿Ifhe Y
invention, therefore, is notlimited to the lcon
struction and arrangementshovrn.
i
.
.ï
tacl'led from the Supporting Lframe H2 and'l‘otal'ted
The press of the >present inventionisfnotÍonly
adapted 'for the compressing and preform'ing -„of
vertically below the Va'Xís of ythe hîlb vnfl'elfiiber.
ïmaterial, `asïhereinbefore described, but it .is;,ius't
tofbr'i'ng the replaced axle pin o'r Ys'tub shaft `2‘2
"_I'hu‘s Set, th'e'hub member 'is again attached to
the'frame lli.4
y
'
.
l
ì
In the manufacture 'cf plastic iiielded lining
»"s'tocli and the like, six ' adjustments'for thickness
will usually 'sufüce Hëncefsu'ch’provision is'niad'e
in the press illustrated, yi.`e.,'“siX‘ofY the -'b‘o`re's'2'l
are provided in the hub member I6 at different
distances radially vfrom the center of the hub and
in a hexagonal arrangement. Accordingly, a hex~
agonal arrangement of holes I8 is provided in the
annular flange or collar portion Il of the hub
member I6 and a like arrangement of holes in
the supporting frame i0 for the reception of the
securing bolts I9.
By the foregoing provision,
strips 'or sheets from the constituentloofse bul-k
Vas advantageously usable for re-pressing land
calendering preformed strips or sheets.
This vis conveniently accomplished by> feeding
the strips or `'sheets edgewise finto the'tapered
space between they-inner rotor~23 andouter ring
member 2l, either by hand :of the `operator¿orfby
some suitable mechanical feeder means. ,-Bylthe
provision and arrangement of the internal rotor
and outer ring element of relatively small diam
eter in the press of the present invention highly
satisfactory calendering is attained equivalent to
or better than that accomplished on machines
having many times larger diameter, external rolls.
What is claimed is:
the adjustment of the hub member I6, conform
ably to the desired adjustment of the axle pin
or stub shaft 22, is easily and accurately effected.
1. A press of the character described, com
prising a hub member supportedly secured for ro
tative adjustment about a horizontal axis, said
If a greater range of adjustments is desirable for
member having a plurality of parallel horizontal
further variation in thickness of product, a cor 60 bores the axes of which are at diiîerent radial
responding increase in the number of bores 2|
distances from the axis of said member, a stub
may be provided in the hub member I 6 and a pro
shaft removably mountable in any one of said
portionate balanced number and arrangement of
bores, a rotor detachably mountable rotatably on
the bolt holes I8 in the hub flange or collar I1
said stub shaft in abutting relation to the end
and also as to the holes in the supporting
face of said hub member, the circumferential face
frame I0.
.
of said rotor being cylindrical, and an outer ring
Any suitable provision may be made for pro
member revolvably mounted concentrically on
ducing product strips 42 of different Widths. As
said hub member and having an internal annular
an example thereof (see Fig. 5) the outer Wall
channel of rectangular cross section surrounding
of the channel 30 may comprise a laterally ad 70 said rotor and in which the peripheral portion of
justable ring 52 inserted in the outer ring mem
the rotor travels in its rotation and is circum
ber 21 and fastened in place by bolts 53. The
ferentially spaced from the channel bottom.
bolts are secured in alternate ones of an annular
2. In a press of the character described, a rig
series of staggered holes 54 in the ring 52 that
idly supported hub member, an outer ring mem
are registrable with a straight annular series of 75 ber revolvably mounted concentrically on said
2,412,299
Vhub member, said ring member having an inter
nal annular channel,`V a rotor adjustably mount
.edon said hub member to rotate eccentrically:
with respect to said ring member, said rotor being
of lesser diameter than said ring member chan-v
nel and with its peripheral portion .traveling in
its rotation within .the channel but spaced cir
cumferentially from >-the channel bottom, and
-means, for adjustingl the axial position of said
8
mounted with respect to the> axis of the latter,
and a rigidly supported hub member, the outer
ring'lmember and the correlated rotor each being
separately mounted for rotation on said hub mem
ber andthe peripheral portion of said rotor trav
eling in vits rotation within the ring member mold
channel but spaced circumferentially from the
channel bottom, and adjustable means for mount- Y
ing the rotor so that the position of its axis of
rotor to vary sai-d space between it and the chan- ‘ 10 rotation may be varied and thereby vary the cir’
ly supported hub member, an outer ring member
cumferential spacing of the rotor and the bottom
of the ring member channel, the rotor being ro
tated by frictional engagement with `interposed
krevolvably mounted concentrically on said hub '
material under compression.
nel bottom. '
,
3. In a press of .the character described, a rigid
member, said ring member having. an internal
annular channel, a rotor mounted freely on said
hub member for rotation eccentrically with re
spect 4to said ring memben said rotor being cylin
drical and of lesser diameter than said ring mem-' >
ber channel and with its peripheral portion trav
eling » in its rotation within said channel but
spaced circumferentially from the channel bot-Vv
.tom_ power means for revolvingrsaid outer ring
member, and means for feeding a proportionately
,
'
6. A .press of the character described compris
ing .a rigidly supported'hub member, opposed
spaced apartmale and female internal roller sur
faces rotatable in the same direction about
mountings on said hub member, the axes of rota- Y Y
tion of ~ said surfaces being relatively eccentric ‘
whereby the restricted space between the surfaces `
is convergent to a desired minimum' dimension,
one vof said roller ,surfaces> being power-drivenY
and the other driven by friction of material com- I '
>measured quantîtyrof moldable material contin 25 pressed between them, and means for radially
adjusting one of said roller surfaces .to vary said
uously into the press in an upper space between
Y the rotor and ring member channel whereby to
restricted space.,
,
Y
7. A press of the character described, compris
ing a revolvable outer ring member havingA an
`4. A press of .the character described, compris-i
ing a revolvable outer ring member having an 30 internal `annular mold channel, a side wall of
which is adjustable laterally for varying' the
internal annular mold channel, a correlated rotor
working width- of the channel, .a correlated inter-V
'or lesser diameter rotatable within said ring mem
changeable rotor, of lesser diameter than the ring
ber and eccentrically mounted with respect .to the
member channel, mounted rotatably'within said
axis of the latter, and a rigidly supported hub
member, .the outer ring member and the corre 35 ring member and eccentrically with respect to the
axis of the latter, and a rigidly supported vhubV
lated rotor each being separately mounted for
member, the outer ring member and the'corre-f`
rotation on said hub member, and the peripheral
lated rotor each being separately mounted for
portion of said rotor traveling in its rotation with
Vrotation on said hub member and the peripheral
Vin the ring member mold channel but spaced cir-`
cuìnferentially from .the channel bottom, and ad 40 portion of said rotor `traveling in its v_rotationy
within the ring member moldv channel vbut spaced
justable means for mounting the rotor so that the
circumferentially from the channel bottom,fand`
position of its axis of rotation may be varied and
means for mounting the rotor so that the position
thereby vary thevcircumferential spacing of the
of its axis of rotation may be ñxed‘ at various '
rotor and .the bottom of the ring memberchannel.
5. A press of the character described, compris 45 positions and thereby vary and positively set'the
circumferential spacing of the rotor from. the
>ing a power-driven revolvable outer ring mem-`
bottom of the ring member channel.
"
ber having an internalannular mold channel, a
correlated rotor of lesser diameter freely rotat
enter lthe convergent space below.
able within said ring member »andreccentrically'
HOWARD SNOW.
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