US760806A - Apparatus for molding sand cores. - Google Patents

Description

*No, 760,806. I PATENTED MAY 24, 1904'; v

. JLE. PRICE.

APPARATUS FOR MOLDING'SAND GORES.

APPLICATION FILED OCT. 3. 1903.

N0 MODEL. 7

UNITED STATES Patented May 24, 1904.

PAT NT OrF i CE. l

JONATHAN armor or oHArrANoooA', TENNESSEE,

APPARATUS FOR MOlIDING SAND CQRES.

Z SPECIFICATION forming part of LettersiPatent No. 760,806, dated May 24, I904.

Application filed. October 8,1903.

.To (tZZ .who'rw it may] concern:

Be it known that I, JONATHAN E. Parana citizen of the United States, residing at Chattanooga, in the State' of Tennessee, have-in vented certain new'and useful Improvements in Apparatus for Molding Sand Cores, of which the following is a specification.

The Object .of the invention is to provide an eflicient and 'satisfactoryapparatus that may tures of construction and combinations of.

parts hereinafter set forth and claimed.

' In the dr.a-wings,.Figure 1 represents a side elevation of the apparatus in its closed or. op-

erative position, thecore-box being shown partly'in section --Fig. 2. is a detachedview of the molding-tool in its 'openornon-,operative-position. Fig. 3 is an end view of the core-box, showing the molding-tool therein in its closed or operative position. Fig. 4 is a vertical section of the core-box and the molding-tool in place, the molding-tool being in its non-operative or open position. Fig. '5is a perspective view of the sand core after same has beenrernoved from the core-box. Figs.

6 and 7 represent sectional views of the sand COI'G.

tion shown in the accompanying drawings as applied to an apparatus for molding cores for the eyes of sash-weights. The core-b'oxa consists of two parts and is constructed in the usual manner, except that each part is provided with a slot Z2, so placed that the slots shall be diametrically opposite each other when, the core-boxes are in use. These slots are intended to receive and to permit movement of the molding-tool, as hereinafter described. The molding-tool consists of two sections 0, pivoted together, as at d. Each section is provided with a recess 0, shown as semicircular in the drawings, said recesses being arranged so that they shall register with each other when the tool is in its closed or operative position to form a perforation there- The invention is for the purpose of illustra- Serial No. 176,220.- No model.)

but for the purpose of molding cores for the eyes of sash-weights-it is preferably provided with a curved or segmental surface.

Preferablythe tool is mounted on a bench "or support 9, (shown in Fig. 1,) and 'each'of the sections is connected by means of rods it with a bar -i,whereby the tool may be opened by pressureupon the bar. The tool is normally held in' its closed or operative position and, is returned thereto after being opened by a spring j, interposed between the bar and the bench when the pressure upon the bar is released. Suitable means, such as a lever and bracket or brace Z, secured to the bench, are

provided for holding the parts of the'core-boX together while the sand is being molded. The lever-7c is actuated by any suitable means, as the foot-treadle m, whereby the same may be disengaged to permit the core-box to be removed. 'In order to mold sand cores for the eyes of sash-weights with this apparatus, the molding-tool is first brought to its closed or operative position, where it is held by the spring j. The core-box is then put in place, the slots Z) being slipped over the end portions of the molding-tool. These slots permit the tool to be withdrawn after the core has been formed. When the core-box is in place upon the frame, one end of the same rests against the stationary support or bracket Zthereof, while at the other end the movable clamp or lever is is brought tightly against the same, whereby the parts of the'core-box or mold will be held tightly together and against the support or bracket Z. While the parts of the core-box are held against movement by the lever in and the bracket Z, the sand is put in and molded into shape. After the core has been formed the moldingtool is opened and disengaged from the core and the core-box through the slots provided in the core-box by means of pressure applied to the bar 2'. This permits the core-box, with the core inclosed, to be removed and an empty core-box to be substituted in its place. The molding-tool is automatically returned to its closed position by the spring j, when the pressure upon the bar 2' is released preparatory to repeating the operation.

By means of this apparatus sand cores for the eyes of sash-Weights can be quickly and cheaplymolded, which provide a perfect substitute for the cast-iron cores now used. Although the apparatus is shown as applied particularly to the molding of cores for the eyes of sash-weights, it is obvious that it may be used also for various other articles of manu-' facture of similar character without departing from the spirit of the invention.

I claim as my invention- 1. In an apparatus for molding sand cores, the combination of a core-box, a stationary support and movable clamp for said box, a molding-tool comprising pivoted sections, one section being provided with a lip adapted to overlap the other section, said sections having corresponding recesses that register with each other when the tool is in its operative position.

2. In an apparatus for molding sand cores, the combination of a core-box, a stationary support and movable clamp for said box, a molding-tool comprising two sections pivoted together, one section being provided with a lip adapted to overlap the other section and having a segmental outer surface, said sections being provided with corresponding recesses that register with each other and form a circular perforation when the tool is in its operative position.

3. In a device for molding sand cores, the combination of a core-box having its sides provided with oppositely-arranged slots, a stationary support and movable clamp for said box, of a molding-tool comprising pivoted seetions engaging through said slots, said sections being provided with corresponding recesses to form a perforation through said tool, substantially as described.

4. In a device for molding sand cores, the combination with a core-box, of a moldingtool comprising pivoted sections movable in said core-box, one of said sections being arranged to overlap the other section and being provided with a semicircular recess that registers with a corresponding recess in the other section when the tool is in its operative position, substantially as described.

5. In a device for molding sand cores, the combination of a core-box, a stationary support and movable clamp for said box, of a moldingtool comprising pivoted sections movable in said core-box, said sections being provided with corresponding recesses that register to form a perforation through the molding-tool when it is in its operative position, and means for disengaging the molding-tool from the core-box after the core has been formed therein, substantially as described.

6. In a device for molding sand cores, the combination with a core-box having its sides provided with oppositely-arranged slots, of a molding-tool comprising pivoted sections engaging through said slots, means for holding the parts of the core-box in their proper position, means for disengaging the moldingtool from the core-box, and automatic means for returning said molding-tool to its operative position, substantially as described.

This specification signed and witnessed this 22d day of September, A. D. 1903.

JONATHAN E. PRICE.

In presence of Z. GRACE BROWNE, R. M. STEGoLL.

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