US227607A - Mold for casting metals on a chill - Google Patents

Description

2 Sheets-Sheet 1. T. M. BISSELL.

Mold for Casting Metal on a. Chill.

No.- 227,607. Patented May 18, I880.

2 Sheets-Sheet 2.

T. M. BISSELL. Mold for Casting Metal on a Chill.

No. 227,607. Patented May 18, 1880.

Nrrnn dramas Mam Fries.

THELUS M. BISSELL, OF SOUTH BEND, INDIANA.

MOLD FOR CASTlNG METALS ON A CHILL.

SPECIFICATION forming part of Letters Patent No. 227,607, dated May 18, 1880.

Application '[ilcd December 15, 1879.

To all whom it may concern in the following specification, reference being had to the accompanying drawings, in which- Figure 1 represents a plan view of a set of molds embodying my improvements; Fig. 2, a vertical section of the same, taken on the line as .r, Fig. 1; Fig.3, a perspective view of the cope detached; Fig. 4, a plan view of thelower partof the mold, the chill-plate bein g removed; Fig. 5, a bottom plan of the ehill-plate; Fig. 6, a vertical section taken on theline y y Fig. 1, and Fig. 7 a plan view of the pattern.

In flasks or molds constructed in the ordinary way for casting upon a chill the arrangementfor pouring is usually such that the molten metal flows in'nnediately across the edge of the chill-plate, which -very soon cuts this edge so as to make it rough and uneven, thereby producing defective castin My invention is intended to obviate this difficulty, thereby making the chill-plate much more durable and enabling many more castings to be made from a single plate before it is worn sufflciei'ltly to occasion defects in the castings.

The improvement is especially applicable to the casting of mold-boards for plows, though it may also be used for other castings; and therefore I do not limit my invention to the production of the above-named castings only.

The invention consists in the devices and combinations of devices, all of which will be hereinafter more fully described, and pointed out definitely in the claims.

In the drawings, A represents the lower part of the flask or mold, which, in general features, is of ordinary construction, and adapted to the particular casting which it is desired to produce.

The mold shown in the drawings is adapted to the casting of mold-boards for plows. The patt rn 13 is shown in the drawings of the form of an ordinary mold-board for plows, with this exception: At the edge I), which is the outer edge, or the one next to the sprue as it lies in the m0ld, there is provided a flange,

B, which is attached to the lower corner of the edge I), and projects outward, the first portion, I), being of about the same thickness as the pattern, and the extreme outer portion, 11 thereof being of less thickness, the upper surface being cut away somewhat, as shown in Fig.

7 of the drawings. This flange is of SllffiOlGIlt' width and thickness to produce a passage, a, in the mold large enough to accommodate the flow of molten metal. It is evident, also, that in preparing the mold with this pattern the passage (1. will be in the form of a recess or depression outside of and lower than the bottom of the recess a,for1ncd by the pattern for the mold-board proper, as shown in Fig. 6 of thedrawings.

The chill-plate C is constructed generally like chill-plates in ordinary use, in this instance being of such form as to conform to the mold-board pattern B. It is wider than the pattern, and at the edge next to the sprue is provided with a rib or projection, 0, along the under side, of a thickness equal to the thickness of the pattern, and of a width equal to the width of the first section, I), of the flange on the pattern.

The cope D is made in separate and detachable form, so that it may be removed from the mold at pleasure. The back side of the cope is fitted to the thickened edge of the chillplate, and is constructed with its upper part flanged or projecting inward over the top of the plate, as shown at d in Figs. 3 and 6 of the drawings rThis cope is provided with a sprue, d, whichfiipehs at its lower end into a longitudinal channel, a, in the mold below, just outside of the passage a, with which it communicates by short openings or cross-passages a".

At the inner end of the cope is a lug, (P, which is received by a slotted lug, E, on the chill-plate, provided with a slot or recess, 6, for the lug on the cope. The outer end of the cope is held by a pin entering the mold-frame-an ordinary-"fastening in molds.

The chill-plate is provided with a strengthening rib or flange, F, running longitudinally along its upper surface, and which at each end is bent and provided with holes f for the reception of suitable handles G, by means of which the plate is lifted and carried from mold to mold in the process of casting with a single chill-plate, to which process my improvement is adapted. .In using but a single chill-plate the latter soon becomes heated, and the handles are therefore made detachable, so that they may be kept cool to enable the plate to be easily handled.

Now, in the process of casting with my improved mold and chill-plate, it will be seen that when all the parts are in position and ready for pouring, as shown in Figs 1, 2, and 6 of the drawings, and the molten metal is poured into the sprue, it will enter the channel a and pass thence through the opening a into the passage a, through which it flows underneath the ribbed outer edge of the chill-plate, and passes up into the chamber formed by the pattern proper.

It is evident that the metal in its hottest state will strike against the lower outer edge of the chill-plate and flow underneath the rib c, by which it is cooled somewhat, so that cutting of the inner edge of this rib will bealinost wholly avoided. This edge will therefore retain its sharpness and smoothness of outline, thereby insuring similar characteristics in the adjacent edge of the mold-board, which is formed against this part of the chill, as shown in Fig. 6 of the drawings.

The roughenin g and cutting away of the extreme outer edge of the chill-plate will be of no importance, as it willon-ly affect the flangepiece B, which is formed on the mold-board, when the casting is completed and taken out, the same as in the pattern. This flange-piece is readily broken ofl' from the casting. the edge of which may then be smoothed if necessary.

The chill-plate may be used repeatedly before the ribbed edge will be worn away sufficiently to impair the desired effect and occasion the defects in the castings which have been mentioned above. In fact, .more than twice the number of perfect castings may be made with a single chill-plate than can be pro- I duced by chill-plates and molds constructed in the ordinary Way.

As already stated, my improvement may be applied to molds for making other castings than mold-boards, for it is evident that wherever it is desired to produce a sharp and smooth edge in a casting this improved con- 5 6' of the drawings.

' Having thus described my invention, what I claim as new, and desire ters Patent, is-

1. The mold A, provided with the depressed passage a, longitudinal passage a and connecting-passages a in combination with the chill-plate 0, provided with the rib c, and the detachable cope D, provided with asprue, at, substantially as and for the purpose set forth.

2. The combination of the mold A, provided with the depressed passage a, longitudinal passage ed, and connecting-passages a, the chill-plate 0, provided with therib c and a slotted lug, E, the detachable cope D, provided with the sprue d and the lug d at its inner end, substantiallyas and for the purpose set forth.

THELUS M. BISSELL. Witnesses:

ANDREW ANDERSON, GEO. W. MATTHEWS.

to secure by Let--

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