US1563529A - Ay atiouitjsz - Google Patents

Description

Dec. 1, 1925. 1.563.529

H. s. SATTERLEE FLEXIBLE CORE FOR MOLDING Filed July 17, 1924 INVENTOR ATTORNEY Patented Dec. 1, 1925.

UNITED Ell HENRY S. SA'ITERIJEE, 0F "EZ'UEK. N. Y.

FLEXKBLTE CllRE F013, lilIOLlI llh Application filed July 17, 1.924.

To all whom may concern:

.lle it known that l HENRY El. file'r'reenne, a citizen of the United. States enclaresident of i iew Yflli'i; city, county and State of llew York, have invented en lrnpreveinent lflexihle {Jere/s fer Molding, oil? which the hillewinn is: a. specification.

lily invention relates to eel-es used in the preeesa ef molding and has to do specifically Wl h flexible cores for the meldin of epirel er euril l cavities in one iieee 01' single hleeh' eestin lf rel/life]: the l erniatien a eurved or Spill ll ea ii a resting; has neveesitated urh (ltlfil'lllfl hein i; made in, tire er more parts and then ass-ienihled. lf a-rtieularly in ll it; rain of nun-metallic euhstanees the preh ahililiee eff unmxan surfaces and inaecurate Wall jeintm-es are greatly inw'eaeed in a llllllldlllll'll casting.

'lhe nee of my eere insa: es Gllflllilfih perfect in lei'ui and eurfaee and at it great reihiel'ien in wet and. simplicity e15 prmluetiezi.

Elly invention may heet he un(lers-:leed. h lU'lllT'Bl'ililto the fellewing speeilieelien and the rli'awiiurs which lei-in pert of it.

ere l ia a plan View hf a (wire for illljj" a egl arithmie spiral rarity. lrilrjure shewe the eere plarwl in a, meld ar z'l'am i: rations.

wines, l lS the eere prepvr inerh el a re er resilient material, er (cemprmralm su-eh as rubber, grelatine er "the li e and Whieh ean he initially formed in it 'l'lui 7 er plastie state.

At 2 is a, traetien lneinber prefera iiy elf hrziided rope havingr at handle or grip k) at its; free end. This traction meinliier may hare a uniform diameter threugheut its length and lii'iiietien well, but I prr this; to have rg'radually diminishing diameter sn'ialler end elf the spiral as iii the drawing.

along: and fixed to the rope is l, which eerrespend iu uuinhei' and sparing: in the 1 artieuler "type and :size oil? were in which they are applied. 'lhese lins are nns-lierahly' inede of a light metal and at their euter ends are Wire am jeining; thu outer ends With the menu -elleruieqh ntly these fine 41: are held he 'that they slant in the direction of the pull that Serial No 72'6 502.

handle 25. The ailment elf this 1 results l find to he when the illlli'lefl with their radius renters i of from 10' to 30 it lied of the eere deereaees tewarrl the small end (if the spiral, the lies, also deereztse until, toward the very end they may he replaced by lznets in the rope etraetien uzeinl'ier. liiueh lrnete are shown at lll will he noted that these time -'iletermine the pwfsllllfil'l ef the repe and its hugetien sueh ES to hi the fins el relatively hear the r iindary iii the (ere The his (3 en the lewer side ef the repe and harm" :lse slant in the same i The degree if slant (if then fin need not he the smile a that elf the l her lH it iieerissar that they ihrm the same angle with their respective radius i'eetera.

Figure F2 illuatrates my eere l plaeed in a l'ltfll li i) readr fer pouring. 'l he hedy of the treniitr el' the core may he supper ed. a. at ll) h .iilll'filJiO means sueh as a rlaiaip (not ehewn.

fill the z-imall ewl reinity oi the huru l, shew a melallie piece ll whieln in this iustenve is El helhiiv i-iteiu flI Ul' the applieatien hi" :1, repreduein er lend speaking unit.

This stem its eleeely ever the f ll Mill end elf the spiral eere l. and is held there h v' passing the Mill ef rope fihreugh Sllll 11 and binding it there by means such as pin The stem ll passing through the 'lhialt l) fern s a sup iort for the small end U' the eere l.

ll? se deeiredythe larger end of the core l nay he supported by a tapered. pin l whieh passes through the flash 9 inte the rere l as shown.

From the lfllGgl'Oll it is clear that my rear may he el such a form of spiral or eui've that it may he all in one plane er it may he in several planes. l: are net liu'iil'ed heyond the elasticity of the core material.

The operation of my invention is follows:

The core 1 is greased or covered with lubricant and pieced in the flask as described and shown in Figure 2.

(ill

The material to form the casting such as a gypsum cement, coverite or other substance, is poured in the tlaslt or otherwise molded about the core and allowed to set. lVhatever taper pins were used to support the core are then withdrawn and the open.- ings left by them are tilled with the casting material. if chaplets are used for support these are plt'VlOllHlY made of the casting material and are left embedded in the casting when the core is \vitlnlravvu.

If a stem such as il ii Figure 2 is used, the pin 12 is withdrawn at the time the other pins or chaplets are talfen out so that the core and stem wi l separate upon withdrawal of the Eormer.

The main core l is now rrady to be removed. This is done by exerting a moderate tension in the handle 3 to overcome the initial resistance of the core after Which it can be pulled out without etiort, leaving a perfectly smooth, awurately formed cavity. Also Where the stem ll is used, the passage of that stem will register perfectly with the spiral cavitv to form a continuous and smooth pasage, and the stem vrill be held solidly in the casting after the core is moved.

The method of removing the flexible core l involves certain factors which are found only in my invention.

The art of traction upon the handle 3 is transmitted through the member 2 and the stays 5 and 8 to the tins :l: and (b and distribute the traction ell'ort throughout the length of the core. 'lhese lins, particularly those at -il-, exert a tangential pull upon the core. This, combined with the elastic properties of the core substance, operates to lirst free the outer surface of the core from the casting and to pull the core slightly forward and permit the dislodginent of the inner border. This first small movement not only frees the core from the casting but permits the gradual entrance of air between the surfaces so that there is no vacuum adherenoe.

The core once started, is Withdrawn Without effort; the flexibility of its material permitting it to pass the curves in the casting without trouble and leaving a smooth, uniform passage.

In being removed from the casting, the core naturally undergoes a certain amount of distortion of its curves. Nevertheless, I have found that, when properly constructed, a core of this nature may be used an indefinite number of times for it resumes its original shape in all respects and suffers no permanent set from use.

\Vhile I have preferred to explain my invention by reference to the format-ion of cavities of a spiral form, it is clear that I may make any form of curved cavity and the amount of draught allotted to the core need be no greater than is customarily used in the art of molding.

Therefore I desire to include in my claims the full breadth of my invention.

I claim:

1. A flexible core having a curved body, a traction member therein and a plurality of transverse elements disposal along and fixed to said traction member.

2. A flexible core having a rrr-l bedv. a traction member therein. 2 transverse elements disposed a to said tra tion member, and stav members connecting the transverse lemenl':-: with the traction member.

o. A flexible core havin. curred body, the cross sectional area or which gradually decreases from one end toward the other, a traction member in said body and extending the full length thereof, a plurality of fins disposed along said traction member and held at a predetermiiwd angle thereto bv stay members. I

l. Jr flexible core haying of spiral foru'i, a traction said body so po itioned as to be relativelv closer to the outer border oi said spiral bodi than it is to the inner border. traction ditributing elements disposed along and. fixed to said traction member and located transversely thereof, said. traction distributing elements being bent at a predetermined angle in the direction of traction and held thereto by stay members extending between the traction distributii'ig elements and the traction member.

5. A flexible core having a curved body, a traction member therein having transverse elements disposed along and fixed to said traction member in such numbers and of such dimensions as to distribute the traction ctl'ort throughout the length of said core.

(3. lhe method of molding curved cavities which comprises pouring casting material around a solid flexible core of the curvature desired, and finally -withdrawirig said core from. the casting material.

7. The method of molding curved cavities which comprises pouring casting material around a solid flexible core of the curvature desired, then freeing said core from its ini tial position to permit air to enter the casting and finally Withdrawing the core.

8. lhe method of molding curved cavities which comprises pouring casting material around a flexible core, then freeing the core from its initial position by tangential force exerted upon the core, and finally Withdrawing the core.

In testimony whereof, I have signed my name to this specification this 12th day of July.

a tapered body member Within HENRY S. SATTERLEE.

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