US111775A - Improvement in supporting-cores - Google Patents

Description

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ENOS B. PHILLIPS, OF CAMBRIDGE, MASSACHUSETTS.

LettersPatent No. 111,775, dated February 14, 1871.

IMPROVEMENT IN SU PPORTING`CO.RES.

The Schedule referred to in these Letters Patent and mal-ting part of the same.

To all whoml'tt'may concern Be it known that I, Esos 13.1n1nn1rs, of Gamhridge, in the county of Middlesex and State of Massachusetts, have-invented certain newand useful Improvements in the Method or Process of Supporting Cores.

In th'e process of making tubes and other metallic bodies where cores are used it is found necessary, when the cores are of any considerable length or weight, to support them in their proper places, in order that good castings may be had; and to render such support both uniform and certain is the nature and object of my invention.

In order to enable others skilled in the arts to make and use my invention, I will now proceed to give a description of the same, reference being had` to the accompanying drawings and letters ofreference marked thereon.

Figure 1 is a pattern having a core-print, a a, extending from either end, andnhaving small bosses or projections, b, raised,4 at regular intervals apart from each other, upon two opposite sides of' its surface.

'Ihe'bosses are perthrat-ed in the direction of the center of the pattern, for the purpose of ,allowing the chaplets which support the core to be readily inserted therein, and which may beeasily understood by a reference to Figure 2, in which-- c c is the ask.

D D, the pattern.

c c, the chaplets which support the core, the core itself being indicated by the dotted'lines ff.

The holes in lthe bosses are made just large venough to allow of the chaplets being readily inserted therein, and are varied in depth according to the thickness of metal which it is desired to have in the casting.

The chaplets are made with wide flat heads, so that they will remain :firmly imbedded i n the sand aftcrtlie pattern is removed.

Figure 3 is a nowell or lower part of a flask, c l.

c e are the ends of tbc chaplets, and

fj', the core.

In this figure the core-prints come through the sides of the pattern, instead of the ends, as shown in figs.1

' andi?.

the cope or upper' half 'of the 'tia-sk, thus insuring a positive resistance againstA the tendency of the core to spring upward when the metal is poured into the mold.

The chaplets in the nowelirest entirely in the sand,A their wide fla-t heads having sufficient hearing to enable them to sustain the heaviest cores in their proper places.

Figures 5 and (i show the common method of sup porting cores.

In thosegures the chaplets e e are straight pieces of wire inserted in the sand after the pattern is taken out, and driven downuntil they come against the board P P, which is placed .under the bottom of the flask.

One-half of the flask only is-showu in the figures, as that is enough to.illustrate theway in which it is done.

The inconvenience of this system will be readily seen, as it requires a great deal of timeand care v on the part of the molder' to set the chaplets correctly, and any changes in the size of the core, such as being larger at one place than at another, greatly increases the diculty; and, if the chaplet-s are not all of au exact length, as is sometimesthecase, the core will sag down, as seen at iig. 5, and the work will be likely to be lost.

With Iny invention vthe diiculties referred to are entirely removed, as the chaplets can be inserted in the patterns almost.instantaneously, and, as the bottoms of the holes in the patterns indicate exactly the core-line, it follows that, by merely dropping the chaplets into the holes, they (the chaplets) adjust themselves properly in relation to the core.

Operation The pattern, upon being placed in the nowell for the purpose of molding it, will vbe so disposed that the perforated bosses'will remain in a. vertical position.

The chaplets being placed in the holes which are uppermost, the nowell will now be lled with sand, whichivill betamped to the required degree of compactness. It will now be reversedthat is, turned upside downwhich operation brings the pattern to the surface.

Chaplets will next be placed in the holes in that side ofthe pattern which is now ppperiuost, after which the cope or upper half of thel flask will be placed upon the nowell, filled with sand, and tamped, as previously done in the nowell.

'Ihe cope will next be lifted off the nowell carry' ing with it the chaplets which were lastinserted in the pattern.

The pattern will now he'removed, leaving the ehaplets which were rst inserted standing in they Flat-headed chaplets inserted in patterns previous mold, so that Athe coro will rest upon them when it is to molding, for the purpose described and hereinselj,

laid into its plage, forth.

The cope ozni now be put back iu its place upon I ENOS B. PHILLIPS. the nowell, and the mold is all completed. .Vituesses:

What I claim as myiu\-ent.io11,aud desire to secure oBERT ASEE, by Letters Patent, is- WM. HENRY Hmmm.

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