US717631A - Molding apparatus. - Google Patents

Description

Elm-717,631; PATENTED JAN. 6', 1903.

S. SHAW. MOLDING APPARATUS.

APPLIGATIOH FILED JAN. 101 190% N0 MODEL.

iiiiiimmli sklmmzw llnirnn STATES PATENT Oiuucn.

SOLOMON SHAW, OF MILWAUKEE, WISCONSIN.

MOLDING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 717,631 dated January 6, 1903.

Application filed January 10, 1902. Serial No. 89,210. (No model.)

1'0 aZZ whom, it 7na'y concern/.-

Be it known that LSQLOMON Snaviga citizen of'the United States, residing at Milwaukee, in the county of Milwaukee and State of IViscousin, have invented certain new and useful Improvements in Molding Apparatus, of

which the following is a specification.

My present invention pertains to improvements in molding apparatus, and more parshowing the drag in which the lower portion of the mold is formed, the lower core-piece resting thereon and the upper core-piece being turned preparatory to lowering it to place on the lower core; Fig. 5, a similar view, the upper core having been lowered to place; and Fig. 6, a like View illustrating the lowering of the lower internal core into position.

The main object of the present invention is to provide means whereby cores of green sand maybe readily formed and manipulated and after being properly positioned released from their support.

As above suggested, the invention is especially applicable to the manufacture of double-arm pulleys and in practice has been found highly ehicient and economical,

In the drawings a three-part flask is shown a drag A, an intermediate section B, and a cope 0. Within the lower or drag section there is formed the mold for that portion of the pulley which is to be cast therein,.or, in other words, one-quarter of the pulley or that portion which lies within the limits of the drag, as shown in Fig. l. A core-piece D is then formed,'and to facilitate its construction in green sand the skeleton frame or support, Fig. 2, is employed. As will be seen upon reference to said figure, it consists of two circular members E F, connected to each other by aseries of radial arms G. A series of pins or studs I-I extend upwardly from fingers I, extending inwardly from the outer about the frame to form the lower core-piece.

A pair of eyebolts or rods .7 are screwed down into oppositely-disposed arms of the frame before the core is formed thereon and serve as a means to facilitate the handling of the core when the same is completely formed. In Fig. t the completed core D is shown in place upon the lowermost portion of the mold, which, as previously stated, is within thed rag A, the eyebolts having been withdrawn. The withdrawal of the bolts leaves the openings DI Di. 7 t

The upper core-section (designated by K) is formed about the skeleton basket or framework. (Shown in Fig. 3.) Said basket consists of apair of small rings or circular members L, a second pair of circular members or rings M, the members of each pair being connected to each other by short posts or pillars N, and thesmaller and larger rings being likewise connected by radial arms 0. Trunnion-supports P are-provided upon opposite sides of the basket, and trunnions Q are inserted therein when the core is ready to be manipulated. In putting this core-secti0n in place it is necessary to turn it over, and it is looking to this end that the trunnions are provided. In Fig. 4 the core is shown as having been elevated from the core box or mold and bodily transported and brought to position over the drag and lower core D. In said Fig. 4 the core isshown as partly turned, and in Fig. 5 it is illustrated as being in place with the trunnions removed. .The skeleton basket insures stability to the green core and affords a ready means for attaching the trunnions without any liability of breakage of the core, the trunnions, as above noted, fa-

cilitating the handling and turning of the same. After core K is in place the intermediate section of the flask is lowered to position, and then the cope, with its contained mold-section, is put in place. After the cast has been made the skeleton frame and has ket, which arepreferably formed of light cast-iron, are broken up and removed from within the completed pulley. It is manifest that said frames may be made of separate pieces secured together, and it is likewise evident that they may be changed in contour and form without departing from the spirit of my invention. The invention is not of necessity to be limited to the casting of pulleys, as it is applicable for use in the manufacture of any casting where core-pieces are to be used, and especially Where one of the cores has to be turned over after it is removed from the core-box.

The usual vent-holes will be provided as found necessary.

Having thus described my invention, what I claim is- 1. In combination with a three-part flask, a two-part core contained Within the central flask-section, each portion thereof containing a skeleton supporting-frame; and detachable means connected to said frames for facilitating the handling of said cores and the bodily rotation of one of them as they are placed in position, substantially as described.

2. In combination with a flask, a two-part core, each part of said core containinga rigid internal supporting member; detachable means connected to the lower one of said members for facilitating the handling of the core formed thereon; and detachable means connected to the upper member for facilitating the handling thereof and the attached core and permitting a bodily rotation of the same about a substantially horizontal axis, substantially as described.

3. In combination with a flask, a two-part core, each part of said core containing a rigid internal supporting member; removable means connected to said supporting members for facilitating the handling of the cores and permitting bodily rotation of one of the cores about a substantially horizontal axis.

4. A skeleton supporting-frame foragreensand core, combined with removable trunnions.

5. A skeleton supporting-frame for greensand cores, said frame having sockets for the reception of trnnnions, combined with trunnions adapted to be mounted in said sockets.

6. A skeleton frame for green-sand cores,

said frame having the general shape and con-

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