US686730A - Process of manufacturing shoe-heels. - Google Patents

Description

No. 686,730. Patented Nov.'|9, l90l. H. HELLWEG.

PROCESS OF MANUFACTURING SHOE HEELS.

[Application filed Jan. 18, 1901.)

(No Model.)

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PROCESS OF MANUFACTURING SHOE-HEELS.

SPECIFICATION forming part of Letters Patent NO. 686,730, dated November 19, 1901.

Application filed January 1 8, l9 0 1.

tion.

My invention relates to improvements in processes of manufacturing aluminium heels for shoes.

My invention is explained by reference to the accompanying drawings, in which- Figure 1 is a top View, and Fig. 2 a longitudinal vertical section, of one of the shoeheels formed by my process. Fig. 3 is a side view of one-half of the metallic mold in which the heel is cast. Fig. 4t is a longitudinal vertical section of onehalf of the core-box employed in forming sand cores used in casting the heel. Fig. 5 is a top view showing the two parts of the core-box secured together.

Like parts are identified by the same reference-letters through the several views.

One form of metallic shoe-heel made by my process consists of a thin hollow shell A, having horizontal cross-piece B, (to which a nonmetallic tread-piece O is attached,) metallic cross-pieces D, and flexible fastening-barbs E. Owing to the peculiar shape of the shell A it becomes necessary to cast the same in a twopart separable metallic mold, one of which parts is shown at F.

G is the core, which is preferably made of sand.

H is the duct or passage through which the molten metal is poured into the mold.

I I are horizontal apertures formed in the core in which the molten metal flows to form the cross-pieces D of the heel. The flexible barbs E (shown in dotted lines) are held in place by the core preparatory to casting the heel,when the molten metal forming the crosspiece congeals around the lower ends of said barbs and holds them in place.

J J represent the respective halves of the core-box in which the core G is formed. The respective halves J J are held in place preparatory to forming the core G therein in the ordinary way, when the horizonal bars K are inserted through the apertures L, formed in the sides and one end of the core-box, for the Serial No. 43,691. (No specimens.)

purpose of forming the mold for the horizontal bars D and for supporting the barbs E. A similar bar M is also inserted in the aperture N for the purpose of forming a mold for the cross-piece B. This being done, electric coils O are placed upon the protruding ends of the bars K, whereby said bars become electromagnets and are thereby caused to hold the barbs E rigidly in place while the sand which forms the core G is being packed around them. The sand having been placed in the core-box and the same thoroughly packed, filling the space P, the electric coils O are removed from said bars K, whereby they are demagnetized and cease to attract said barbs E when said bars K are withdrawn from the core-box,leaving said barbs supported by the sand in their proper places. This being done, the respective halves J of the core-box are separated and the core is removed and placed in the mold F, as indicated in Fig. 3. All that part of the core between the lines a and 1) forms the core proper of the shell A, and when in place a space Q is left between such part of the core and the mold for the reception of the molten metal, which is poured into the duct H. The parts of the core R R above and below the lines a and b are nicely fitted to the walls of the mold and serve to hold the central part of the core G securely in place midway between the walls of the mold, while such parts R serve as stops for the molten metal. When the cores have been thus located in the mold, the mold is ready to be used for casting the heels in the ordinary mannor.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. The improved process herein described of manufacturing aluminium shoe-heels, consisting, first, in supporting the heel-retaining barbs upon electromagnet bars within a core box, preparatory to forming the core around them; second, in forming a core around said barbs and electromagnetbars; third, in cutting out the electric circuit com municating with the electromagnet-bars, whereby said bars are demagnetized and said barbs released therefrom; fourth, in removing said bars from the core; as set forth.

2. The process herein described, of mauu 10 with their heads exposed Within the apertures formed by the removed bars, whereby, as the heel is cast, the molten metal will congeal in said apertures around the heads of, and form supporting-bars for, said barbs between the Walls of the heel, substantially as set forth.

In testimony whereof I affix my signature in the presence of two Witnesses.

, HENRY I-IELLWEG.

\Vitnesses:

Ms. B. ERWIN, HERMAN BLEICK.

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