US587728A - Metal-mold - Google Patents

Description

(No Model.) I 4 Sheets-Sheet 1. J. K. GRIFFITH & J. SLATTERY.

METAL MOLD.

Patented Aug. 10,1897.

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J. K. GRIFFITH & J. SLATTERY.

METAL MOLD.

No. 587,728. Patented Aug. 10,1897.

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(No l 4 Sheets-Sheet 3. J. K. GRIFFITH & J. SLATTERY METAL MOLD.

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METAL MOLD.

No 587,728. Patented Aug. 10,1897.

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J AOOB K. GRIFFITH, OF LATROBE, AND J OI-IN SLATTERY, OF PHILADELPHIA, PENNSYLVANIA.

MOLD.

SPECIFICATION forming part of Letters Patent No. 587,728, dated August 10, 1897'.

A plication filed June 26, 1896. Serial No. 554,089. (No model.)

To all whom, it may concern:

Be it known that we, J AOOB K. GRIFFITH, of Latrobe, in the county of Westmoreland, and JOHN SLATTERY, of Philadelphia, in the county of Philadelphia, State of Pennsyl- Vania, have invented a new and useful Improvementin Metal-Molds, of which the follow.- ing is afull,clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a top plan view of a mold constructed in accordance with our invention; and Fig. 2 is a side elevation of the same, partly broken away. Fig. 3 is a side elevation, partly broken away, showing another form of our invention; and Fig. 4: is a top plan view of the same with a portion broken away. Fig. 5 is a side elevation, partly broken away, of a third form of our invention. Fig. 6 is a vertical section on the line VI VI of Fig. 5. Figs. 7 and 8 are end views of oneof the molds employed, showing the block of refractory material over which the metal flows into the mold. Fig. 9 is a longitudinal section of a fourth form of our invention, and Fig. 10 is a cross-section on the line X X of Fig. 9. V

Our invention relates to the casting of a series of ingots or otherarticles in metal-molds, and is designed to provide an improved arrangement of the flask and the metal-molds contained therein, whereby each article or ingot is fed uniformly and continuously during the cooling of the metal therein, and the molds are easily nested together for casting and separated after casting.

In Figs. 1 and 2 of the drawings, wherein we illustrate a simple form of our invention, a flask is employed in the form of a Maltese cross, this flask being preferably built up in sections, as shown, the lower section2 having integral therewith the base-plate 3, while upon the upper section t rests the top closingplate 5. Each arm of the flask is filled with a vertical series of molds which may be superimposed upon each other, and are formed by removable mold-sections 6. The lowermost of these sections is provided with a flat bottom resting upon the base-plate, while in its upper portion is provided the open matrix portion, which is of the form of the article to be produced, in this case a brake-shoe. The upper face of the matrix-cavity is formed by the lower convex face of the next mold-section above, this mold-section having in its upper face a matrix-cavity, which is closed by the lower convex face of a similar section above it, these similar sections being superimposed upon each other until the flask is filled, the matrix-cavities of the uppermost series being closed by the top plate of the mold, which is suitably formed on its under face to give the required shape to the cavity. The center of the flask is occupied by a vertical runner or gate, which is formed of separable interfitting sections 7, having registering vertical holes forming the main gate, from which lead the branch gates 8, communicating with the sprue 0 of each mold, this sprue being formed by a hollow block of refractory material set in a receiving-cavity in the inner end of each mold-section.

The operation is apparent, the molds and centralrunnerbeing built up within the flask, whose sections are placed one upon the other until the desired height is obtained, when, the top closing-plate being applied, the metal is poured into the central gate and thence passes into each matrix-cavity in the several arms.

In Figs. 3 and 4 we show another form of our invention arranged for the casting of ingots. In this form the side arms of the flask are extended laterally and several horizontal series of molds are nested therein. The upper faces of the arms of the base-plate are inclined upwardly to the central portion of the flask, so that the molds 6 lie in inclined positions, each resting on top, of the one beneath it and each containing an entire matrix-cavity for the ingot, this cavity preferably tapering from the gate end toward the outer end, so as to allow easy drawing of the mold. The main central runner is formed with separable sections 7, these sections extending along the inner face of the arms and formed with side apertures or gates 8', which lead into each vertical series of molds. The upperflask-section is provided with an upwardly-inclined rim to inclose the upper molds of each series. In

too

this form we show a bottom runner 10, communicating with the central gate and arranged for bottom pouring, a sink-head 11 being provided at the upper end of the central gate in order to feed molten metal to the upper molds during their cooling.

In Figs. 5 and 6 we show the inclined ingotmolds 6 arranged in a different manner, the horizontal series being stacked one above the other on each side of a central gate, this gate being built up of separable sections 7 which form longitudinal gates 12, parallel with each other and communicating alternately at the ends and at the center .by vertical openings or gates 13. Each horizontal gate is provided with the sprues or gates 8", leading into the inclined molds, and to the center of the lowermost gate leads the bottom runner 10, through which the molten metal is fed. A sink-head 11 is provided,and to preventsticking of the ingot to the under side of the mouth portion of the mold, over which portion .the metal flows and would tend to melt and weld it to the ingot, we recess this under portion, as in Fig. 7, and fill it in with a block of refractory material 14. The molds may, if desired,

be arranged so as to rest on one edge instead of flat upon one side, in which case we place the refractory material 14 .in the corner, as shown in Fig. 8.

In the form of Figs. J and 10 the flask is provided with a base 3', having its face arranged in two series of steps 15, each step having a central flat portion and thence inclined downwardly in each direction,as shown in Fig. 10. The molds 6' rest upon the steps and are held in place by cover-plates 16, the runner-bricks 7 resting upon the central flat portions of the steps and communicating with each other, as shown. Sink-heads 1-1 are provided, one for each series of molds, and to the central lowermostportion of the gate leads the bottom runner 10.

We prefer to use the bottom-pour arrangement wherever the vertical series of metalmolds is employed, although the top pour of Figs. 1 and 2 may be used, if desired.

In casting with the bottom runner metal rising in the central gate passes into the lower molds and fills these first, it then rising and filling the upper ones successively. The advantage of this is that a stream of hot molten metal flows past the entrance of each filled mold while its ingot is cooling, thus feeding each ingot as it shrinks, preventing piping therein.

By placing the molds in an inclined position, as shown, the metal flows continuously down the side and there is no danger of shells or scabs forming on the sides of theingot, as is frequently the case from top pouring when the molds are arranged vertically. Moreover, there can be no splashing of the metal on the side of the ingot and the mold is thoroughly vented, the air being forced out of the top portion of the mold which is last filled. The inclination also causes one series of molds to fill of which extend vertically, but also gates whose general direction is upward-such as, for instance, in Figs. 5 and 9, wherein portions of this gate are substantiallyhorizontal,

. while the general direction of flow is upward.-

The advantages of our invention will be obvious to those skilled in the art, since a large number of metal-molds maybe nested together within a single flask and all filled at the same operation. No skilled labor is necessary in assembling the parts, and piping is effectually prevented.

Many changes may be made in the form and arrangement of the parts without departure from our invention, since WVhat we claim is A 1. The combination with a flask, of a series of separate metal-molds fitting therein, said molds being superposed one above the other, and a separate vertical runner of refractory materiahhaving branch gates leading into the matrix-cavities of the metal-molds; substantially as described.

2. The combination with a flask having arms radiating from a common center, of separate metal-molds superposed upon each-other in each arm of the flask, and a central vertical runner of refractory material, having branch gates leading to the mold-cavities; substantially as described.

3. The combination with a flaskcom-posed of several horizontally-dividedsect-ions, of a series of separate metal-molds fitting therein, said molds being superposed one above the other, and a separate vertical runner of refractory material having branch gates leading into the matrix-cavities of the metal-molds; substantially as described.

at. The combination with a flask, of a series of separate metal-molds fitting therein, said molds being superposed one above the other, a separate vertical runner of refractory material, having branch gates leading into the matrix-cavities of the metal-molds,and a bottom runner leading to the verticalrunner; substantially as described.

5. The combination with a flask, of a series of separate metal-molds arranged in an inclined position therein, and a gate of refractory material having branches leading into the upper ends of the mold-cavities substantially as described.

6. The combination with a flask,of a series of separate metal-molds arranged in an inclined position therein, and a bottom-pour runner arranged to feed the metal into the upper ends of the mold-cavities; substantially as described.

7. The combination with a flask, of aseries of molds arranged in an inclined position therein, and a central gate having branches leading to the molds, each mold having the under side of its upper end provided with a layer of refractory material, substantially as described.

S. The combination with a separate bottom support having an inclined upper face, of a series of separate metal-molds placed thereon in an upwardly-inclined position and superimposed upon each other, and a bottom-pour gate of refractory material passing through said support and having branches leading to the upper end of each mold-cavity.

9. In casting apparatus, the combination with an upwardly-extending main gate or runner, of upwardly-inclined molds having their upper ends connected to the main runner by branch gates, said molds being arranged at successively higher levels, and a bottom runner leading to the lower portion of the main runner, whereby the metal flows downwardly over the side or sides of the 20 lowest mold and then upwardly through the main gate, past the branch gate of such mold to a mold at a higher level, at the same time feeding the shrinkage in the first-filled mold.

In testimony whereof we have hereunto set 25 our hands.

JACOB K. GRIFFITH. J OIIN SLATTERY. \Vitnesses as to J. K. Griffith:

CHAS. W. SAXMAN, H. M. HUFFMAN. lVitnesses as to John Slattery:

ROBERT W. HUTCHISON, EDWARD SHIELDS.

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