US1533375A - Core-forming apparatus - Google Patents

Description

' April 14, 1925.v 1,533,375A

T. H. BROWN CORE FoRuING APPARTUS Filed Aug. 29, 1923 A lwerdor': 'zomasrololrow);

Patented Apr. 14, 1925.

UNITE@ STATES-,PATENT OFFICE.

THOMAS HAROLD BROWN, F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO E. E. BROWN @c CO., INC., OF PHILADELFHIA, EENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CORE-FORMNG- APPARATUS.

Application led August 29, 1923.

`is particularly adapted fo-r the production of apertured cores having characters or indicia therein for reproduction on the castings, as sash weights, formed therefrom.

The leading objects of my invention are the improvement of the quality o-f the cores and castings formed and the simplification of the apparatus. By my improvements, the crumbling of the edges of the core is lavoided and a core formed from which a casting, as a sash weight, may be formed having a curved nonabrading bearing for a cord and displaying a character denoting, for instance, its'weight or quality. My improved apparatus comprises few and simple pieces and eliminates the necessity for Vsprings and spacers heretofore required.

In its preferred form, my invention is embodied 1n a single piece core box or mold having latersal openings through which cooperating molding bars are introduced and removed, such members prefer. bly being longitudinally tapered and one thereof comprising a fixed member preferably having a curved surface which gives to the core and the casting made therefrom a curved bearing for the engagement of a cord.

The characteristic features of my inrprovements will more fully appear from the following description and the accompanying drawings of a preferred embodiment thereof.

I In the accompanying drawings, Fig. 1 is a side elevation, partly in section, of appa.- ratus embodying my invention; Fig. 2 is a top view taken on the line 2-2 of Fig. 1; Fig. 3 is a perspective view of the character bearing molding bar; Fig. 4 is aperspective View of a core formed in my apparatus, and Fig. 5 is a perspective view of a sash weight produced with the use of the core shown in Fig. 4.

As illustrated in the drawings, a base 1 has thereon a post or pedestal 2 to which is Serial No. 659,886.

bolted a longitudinally tapered molding bar 3 secured in place by a nut 4, and having a curved lower surface 3 and a flat upper surface 3. A one-piece core box 5 contains a recess socket- 6 having an open end and surrounded by the wall 7, the latter containing the diametrically opposite apertures 8..

A second molding bar 9, having a longitudinal taper complementary to the taper of the molding bar 3, has thereon an embossed character 10, and is provided with a stop 11.

In assembling the apparatus for the formation of a core, the molding bar 9 is inserted through the apertures S of the core bonr until the stop 11 engages the wall 7, when the character is centered in the aperture 6. The core box, with the molding bar 9 therein, is then slid over the upper surface 3 of the molding bar 3 until the end of the bar 9 engages the nut 4. Sand is then rammed in the core box about the molding bars and forms a. core, such as illustrated in Fig. 4, having a body 12 containing an aperture 13 spanned by ay bridge 14. Ihe aperture has a flat surface 15 with the intaglio character 10 therein and the curved surface 16 conforming with the curvature of the surface 3. When the core is used for casting a sash weight such as shown in Fig. 5, the metal entering the core aperture 13 forms a. cross bar 17 having a fiat end 18 bearing the character 10, indicating for instance the number of pounds in the sash weight, and a curved surface 19 providing a non-abrading bearing for the sash cord.

When the core is ready for removal from the core box, the latter, with the molding bar 9, is moved along the molding bar 3, the tapered formation of the molding bars facilitating the removal and avoiding breakage of the core edges. When the parts have been removed from the molding bar 3, the molding bar 9 is lowered sufliciently to disengage the character 10 from the sand then moved longitudinally out of the box.

Having described my invention, I claim:

1. Core forming apparatus comprising a core box having an apertured wall and oppositely tapered molding bars independently movable longitudinally through said wall.

2. Core forming apparatus comprising a one-piece'core box having an 'apertured Wall and, molding btais movable through rsaid Wall, one of said bars having a curved suifaee and one of ysaid bars having a character 'design thereon, said bars together having` substantially the same oi'oss sectional area at the opposite sides of said Core box.

8. Core forming ialpparatus'comprising a core box having san apeitui'ed wall and molding bars independently movable longitudinally through said Wall, one of said barscairying a charac-ter and ythe other baihfaving a curved surface, said bars having complementary tapers so that their coinbinedcioss sectional areas are substantially the same throughout the oorebox.

4. Co|11e-foif1ning apparatus.comprising a.

bese, a` molding .bar fixed .to said base, a Core' btox having a. Wall containing` opposite apertures movable on said molding bar, and a Second molding bar movable relatively to said box and to said bar first named.

5. Gore forming apparatus comprising a base having` connected therewith a tapered molding bai` having a curved surface, a c-oie box having an apei'tured Wall movable on said bar, anda second tapeed molding bai cai-Tying a character and movable longitudinally in said core box and relatively to said iii'st bai.

`Signed at Philadelphia, inthe county Ot' Philadelphia and State of Pennsylvania, this 27th day of August, 1923.

THGMAS HAROLD BRUXN.

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