US867693A - Wire-bar mold-core. - Google Patents

Description

No. 867,693. PATENTED OCT. 8, 1907.

' F. L. ANTISELL.

WIRE BAR MOLD GORE. APPLICATION FILED JULY s. 1906.

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UNITED STATES No. 867,693. A

To all whom it may concern:

Be it known that'I, FRANK LINDEN ANTISELL, a citizen of the United States, and a resident of the city, county, and State of New York, have invented a certain new and useful Improvement in Wire-Bar Mold- Cores, of which the following is a specification.

My invention relates to wire bar mold cores and especially to water cooled wire bar mold cores;

An object of my invention is to make a core which will produce a mold without cracks into which water may lodge and cause an explosion when molten metal is poured.

Another object is to produce a core without the necessity of any machine work.

Another object is to produce a core which will not shorten each time a casting is made.

Another object is to produce a core which will last longer and the molds made by such core will also last longer.

Other objects will appear from the hereinafter description.

Referring to the drawings, Figure 1 is a plan view of the core seated in the mold. Fig. 2 is a cross section on line 2 of Fig. 1 showing the core in elevation. Fig. 3 is a cross section on line 3 of Fig. 2. Fig. 4 is a longitudinal section of my improved water cooled core. Fig. 5 is a cross section of the same on line 5 of Fig. 4. Fig. 6 is a detail view of one end of the core showing the horizontal cooling pipe and one of the inlet and outlet water pipes communicating with the chamber at the end of the core. Fig. 7 shows a mold made from the core of Fig. 4.

Before describing my invention I will set forth briefly, the prior manner of casting copper molds used for receiving molten copper and forming it into castings suitable for a rolling mill. The part marked A on the drawing is what is known as a wearing plate. A is the end thereof and A the sides, all of which are clamped together and form an open box into which copper is poured to a predetermined depth. A core B of the desired shape is forced into the molten copper displacing the copper and causing it to rise to nearly the extreme top of the core. As the mold cools, the core tends to expand and shrink, the tendency being for the core to be firmly shrunk in the mold from which it is necessary to draw it by force, and for this purpose a number of stud bolts S are necessary. It is found that in prior devices when such a core is finally forced from the mold, numerous cracks are produced owing to the mold shrinking to a greater extent than the core has been compressed. To overcome the objection of cracking just referred to, copper cores have been proposed. Such cores, while avoiding the disadvantage of cracking the mold, are open to the objection that each time a mold iscast, the compression of such a WIRE-BAR Mono-cons.

Specification of Letters Patent.

Application filed July 5, 1906. Serial No. 324,772.

PATENT OFFICE.

FRANK L. ANTISELL,

OF NEW YORK, N. Y.

Patented Oct. 8, 1907.

core results in a permanent set, the core thus decreasing in length each time a mold is made, until after a few molds have been finished, say a dozen, more or less, if it has not deteriorated or warped to such an extent as to render it useless, it must be discarded on account of its length. Another type of core has also been suggested by which an attempt has been made to cool this core by forming in the upper surface thereof a channel, into which water is poured. This core has been found to be unsatisfactory owing to the fact that there is a constant tendency of such a mold to warp in two different directions. Furthermore, there is a tendency of the casting made in such a mold to stick. I have overcome all these objections by my improvement, which I will now describe. I

The part marked B represents the core which may be made of any suitable metal, but I prefer to use cast iron. Extending longitudinally through said core is an extra heavy iron pipe or tube E which has been thoroughly coated with graphite before the core has been cast around it, which permits the tube and the core surrounding it to freely expand or contract relatively one to the other. F is a chamber at each end of the core into which the end of the pipe projects. This pipe may have longitudinal expansion and contraction in said chamber. G G are vertical pipes tapped at each end of the core and communicating with said chamber F. The entire core is fastened to a suitable apparatus, not shown, operated by screws or levers by which a substantially vertical movement may be obtained. One of the pipes G, is connected to a source of water supply, and the other G is connected to an overflow or waste.

In using my core, the metal, molten copper, is poured into the open box shown and described in Figs. 1 and" 2, in the usual manner, to a predetermined height. The water at this stage of the operation is not needed, and is therefore shut off. The apparatus to which the core is fastened is caused to descend. 'Ihe core is forced into the molten metal which is displaced as hereinbefore described. The molten metal rapidly chills and the core becomes hot and expands. At a critical point where cracking would begin to appear in the mold if the core is permitted to continue to increase in length and the mold to shorten, water is admitted through the vertical pipe G and allowed to flow through the horizontal pipe E and out through the overflow pipe G until the core shrinks to a greater extent than the mold, from which it may be freed with little or no effort, by lifting up on the stud bolts S, and the mold will be found to be practically free from cracks, as shown by Fig. 7. The core itself does not warp or twist out of shape and can be used over and over again; thus the cost of repeatedly renewing the cores is dispensed with.

While I have specified that I use water for cooling, it is to be understood that I do not limit myself to this, as any other cooling liquid or a gas may be used. Also various changes may be made in the construction here shown and described without departing from the spirit of my invention.

I desire it also to be understood that the language used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention, which, as a matter of language, might be said to fall therebetween.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A mold core having a chamber at each end thereof, a pipe extending through the core and communicating at each end with the chamber, a supply pipe connected with one of the chambers, and a waste pipe connecting with the other chamber.

2. A mold core formed of metal having a chamber at: each end thereof, a pipe extending through said core, each end of the pipe projecting into a chamber, supply pipe connected with one of the chambers, and a waste pipe connccted with the other chamber.

3. A mold core having a chamber at each end thereof, a pipe extending through the core and comumnicating at each end with the chamber, said pipe beingcovered or coated with graphite, a, supply pipe connected with one of the chambers, and a waste pipe connected to the other chamber.

In witness whereof I have hereunto set my hand at Perth Amboy, county of Middlesex and State of New .Icrsey this 28th day of June, 1906.

FHA NK L. 1\ NT I SELL.

In presence of- A. CLAr'roN CLARK, CHARLES C. HUMMANN.

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