US2560258A - Mold chaplet - Google Patents

Description

July 10, 19511 F. P. SNYDER EI'AL MOLD CHAPLET Filed April 20, 1949 llfllllllllll" INVENTORS. HRS/W05? RSHE/VDRY Patented July 10, 195! MOLD CHAPLET Francis Paul Snyder, Davenport, and Robert S Hendry, Bettendorf, Iowa Application April 20, 1949, Serial No. 88,556

This invention relates to chaplets used for holding cores in position when molding. The proposed chaplets may be of various forms and sizes, but they are all made of inexpensive material and of inexpensive construction.

One of the main objects of; this invention is to provide thin metal chaplets that are molded directly into a core to form a part of the general core structure, and which chaplets serve as -a means for supporting and positioning the core in a predetermined relation to the balance of the mold structure of the-cope and drag flasks.

By the use of inexpensive metal readily formable into the desired shape for use with a core, the chaplets of this invention eliminate the necessity of making arrangements or of providing means to salvage or otherwise save the chaplet for re-use when molding. The exposed parts of the chaplet here used melt into the metal poured into the mold when casting.

Other objects and advantages relating to the chaplets of the present invention will hereinafter appear in the following detailed description, having reference to the accompanying drawings and, while we have shown therein what is now regarded as the preferred embodiment of this invention, we desire the same to be understood as illustrative only and not to be interpreted in a limiting sense.

In the drawings annexed hereto and forming a part hereof,

Fig. 1 is a general cross-sectional view taken transversely through a mold and illustrating the use of a chaplet as applied to support a free core within a mold cavity;

Fig. 2 is an edge view of the chaplet per se which is shown in Fig. 1;

1 Claim. (Cl. 22-184) cavity 6 by one or more chaplets II depending upon the length of the core and casting conditions. As here shown, core II] is reinforced by a core rod I2 extending lengthwise of the core, and the chaplet I I is dished at I3 to bypass the rod I2 while in contact with the underside of the rod to form a stronger supporting structure as an integral unit of the connected parts comprising the core and its chaplet supports.

Each chaplet II has lateral wings I4 and I5 disposed in coplanar relation, and the wings are here positioned within the cylindrical dry sand core I6 to project therefrom along a core diameter, as shown in Fig. l. The wings I4 and I5 each terminate in depending ends I6 and I1 arranged at right angles to the length of the chaplet. While we have illustrated the use of this chaplet with a cylindrical core it will be clear that it may be used with any type or shape of core.

By positioning the chaplets II with the upper wing surfaces flush with the parting line 1 of the mold I, by depressing the portions of the wings I 4 and I5, extending from the core I0 into the upper face of the drag mold 5, the core I0 is thereby suitably supported within the part 9 of the cavity 6. In this manner, the drag mold flask 3 and the core are both prepared for the aligned reception of the cope mold flask 2, and the flasks are aligned and clamped together in the usual manner employed by molders. In forming the depressions in the sand for the reception of the chaplet ends, chaplets or other structures may be applied to the pattern to produce the necessary depressions whereby the core is properly located in the mold.

Endwise shifting of the core I0 and the core- -supporting chaplets II is counteracted by the Fig. 3 is a plan View of the chaplet shown in Fig. 2; I

Fig. 4 is an edge view of a chaplet having a modified center construction;

Fig. 5 is a plan view of the chaplet shown in Fig. 4, and

Fig. 6 is a plan view of a chaplet of the type shown in Figs. 1, 2, and 3 but using perforated metal in place of the solid strap metal.

Fig. 1 refers to a conventional form of mold I comprising a cope flask 2 and a drag flask 3 with a suitable cope mold 4 in flask 2 and a complementary drag mold 5 in the flask 3. The mold contains a cavity 6 at the parting surface I of the mold I, with the part 8 of the cavity 6 in the cope mold 4 and the part 9 of the cavity 6 in the drag mold 5. V

.A dry sand core I0 is supported within the portions of each chaplet that are embedded in the mold sand which includes the down-turned ends I6 and ll of the wings I4 and I5. Cooking of the core I0 is further counteracted by the same elements through the interconnection of these chaplet parts with the mold sand. Direct lateral shifting of the core will be counteracted by the ends I6 and I I by their positions in the mold sand in planes parallel to the plane of the core axis. With the cope in place, the chaplet ends are held in embedded position.

When molten metal is poured. into the mold I through a suitable gate, the metal will fill the mold cavity 6, and the exposed portions I8 and I9 of the chaplet II, as best shown in Fig. 1, will melt and become part of the cast metal body after pouring.

The chaplet I I, as shown in Figs. 2 and 3, is of uniform width throughout its length. A modified form of chaplet, 20, is shown in Figs. 4 and 5. which has a reduced width of center section 2| for the reception of the core rod 12. By using the V deformation 22, rod 12 is more easily centered with respect to the chaplet 20 in building up the mold core unit.

Chaplet 20 has its wings 23 and 24 of greater width, terminating in down-turned ends 25 and 26 for embedding same between-the cope and drag mold sand, and the reduced center 2| is the portion which spans the mold gaps and penetrates the core supported thereby. The melting time of the exposed portions of the chaplets 20 can be varied by changing the width of this center chaplet section 2!. I

The construction of chaplet indicated at 21 in Fig. 6 is made of perforated metal having the same general configuration as the construction shown in Fig. 2. This can be varied, if desired, as contemplated by theshape of the chaplet shown in Figs. 4 and 5.

In making the form of chaplet shown in Fig. 5, short transverse cuts may be formed inthe longitudinal edges of the chaplet strips, and then the edges thereof may be turned down so that the thickness of the metal will be doubled in the narrow portion. In this way, the strength will be sufliciently increased so material will suffice, decreasing the. cost of the finished product.

With the use of a perforated metal chaplet, as shown in Fig. 6, the melting time or the strength of the strip may be controlled by the size of the holes or the spacing thereof. In other respects, the chaplet 21 is very light in weight, but it will function in the same manner as the chaplets H and 2| to support sand cores within a mold.

Although the above description relates to the forms of chaplet disclosed in the annexed drawings, changes and deviations may be made in the proposed structures of this invention without departing from the fundamental concept thereof. The extent of such modifications will, however, be governed by the breadth and scope of the appended claim. Having now described our invention, we claim: In combination, a sand core, said sand core being elongate and having a reinforcing rod extending longitudinally therethrough, sheet metal chaplets extending transversely through said core, said chaplet having a depressed portion within said core, within which depressed portion said rod is positioned, said chaplet extending below and in supporting contact with said rod, said chaplet having ends extending beyond said core that a lighter weight of and having down-turned ends for engagement in the sand of a drag mold.

FRANCIS PAUL SNYDER. ROBERT S. HENDRY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Date

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