US224245A - Borne taylor - Google Patents

Description

v SShee-tS-Sheet 1. W. H. 0. TAYLOR 82; J. W. WAILE-S.

Apparatus for Casting Metal. 7

- Np. 224,245; Patented Feb. 3, 1880.

M'bzesses GRAFHER, WASHINGYON D C v 1,Sheets-'-SheeL2. W. H. 0. TAYLOR 85 J. W. WAILES. Apparatus for Casting Metal.

' atented Feb. 3,1880.

"iii:

- Dzwzzloz MPETERS, FHOTO-LITHOGRAPHER, WASHINGTON. D C,

mbzessas 'ing as it contracts around the core.

UNITED STATES PATENT, OFFICE;

WILLIAM H. o, TAYLOR AND JOHN W. WAILES, or PANTEG, COUNTY OF MONMOUTH, ENGLAND.

APPARATUSIFOR CASTING MET-ALS.

SPECIFICATION forming part To all whom-it may concern: r f Be it known that we, WILLIAM HENRY 0s- BORNE TAYLOR and J onN WILLIAM WAILES, both of Panteg, in the county 'of Monmouth, England, have invented certain Improvements in Apparatus for Casting Metals, of which the following is a specification.

Ring-shaped ingots and other annularor circular. castings are ordinarily made by casting the metal in a mold fnrnished'with a central core of sand or other suitable material.

Many disadvantages exist in this method of casting, one of the chief of which is that if the metal is thin itisoften less sound than a block of solid metal, and greatcare must be taken in most cases to avoid the metal crack- To obviate these difficulties metal articles of the kind above named have been cast in molds, which are rotated at such velocity that the molten metal is driven to the outside of the mold by centrifugal force as itis poured there in, so that as the metal coolsit becomes'solidi tied in the form of a ring-shaped ingot or casting, the outer circumference of which takes the form of the interior of the mold.

The object of our invention is "to provide for giving any required shape to the interior circumference of the casting; and to this end our invention consists in the combination, with such a rotary mold, of cores or plungers, which are contained within the mold, and which are adapted to move radially outward by the'centrifngal force generated by the rotation of the mold, so as to impart the form of their outer sides or ends to the inner circumference or' side of the ring or other casting.

In Sheet I of the accompanying drawings, Figure 1 shows a sectional'eleva'tion of a rotary mold, such as is usually employed in forming annular castings withouta core, and'fiide elevation of driving mechanism for imparting motion thereto.

A is a vertical shaft-supported in the standard B and carryingat its upper end the mold O. D is .a-band-pulley on the vertical shaft A,

for receiving the driving-band E from a'pulley, F, on the main driving-shaft G, which turns in bearings in the standard H. The mold 0 consists of a cylindrical box, which is of Iietters Patent No. 224,245,nated February 3,1880. Application at February s, 1879.

closed at top by a flat-faced cover, 0. This cover has a'central opening, 0, which leads, by radial or other passages, c, to a little distance beyond the inner periphery of the box 0, for the purpose of supplying the molten metal thereto. I

The cover will be held in place by means of steadying-pins 0 or their equivalent. On rapid rotary motion being imparted to the mold molten metal will be discharged llllEO t IIB central openin g in the cover,-and\bylts gr avity the metal will find its way into the. mold. Here, by the action of centrifugal force,-it will be heldin contactwith the inner periphery of the mold and form a ring, as at Z, within it.

By keeping up the rotary motion of the mold 'until' the metal has had time to set a ring will be formed with parallel, or nearly parallel, sides, and without the use of a core. The metal will therefore be free to contract in cooling withoutrisk of cracking, and as no air can possibly be imprisoned within the metal the casting nlustnecessarilybe sound throughout.

{When it is desired to gage the thickness of the annular casting, or to give to theinner periphery a special form, we employ a com"- tion of centrifugal force, will .be held against the metal and gage it to the requisite diameter, giving it at the same time, if desired, a

special form.

In Sheet II of the drawings, Fig. 2 shows, in transverse section, and Fig. 3 in plan view,

posite expanding core, which, under the ac-.

wedge-pieces I (at their apex) are rabbeted at their lower edge to bear against a shoulder, 0

formed on the bottom of the mold O, which shoulder gages the thickness, of the casting by limiting the advance-of the pieces constituting the composite core. The centrifugal 10o force generated by the rapid rotation of the mold will hold the core expanded against the pressure inward of the -molten metal, which is admitted to the mold through the runners in the cover 0, as above explained.

The metal in cooling will contract upon the core, forcing inward toward the axis of the mold the wedge-shaped pieces I l, and thus any resistance by the core to the free contraction of the metal will be avoided.

In adapting the inventiol'i to other articles than annular castings the molds are arranged radially in a mold-box or on a table or frame, to which rapid rotary motion is imparted while the molten metal is being poured into the molds from a central supply.

The castings in these radially-arranged molds may be compressed by means of a movable plug or core having any form or shape that may be found necessary, such plug 01' core serving, like the expanding core in Figs. 2 and 3, to resist the motion inward of the molten met-a1, it being held in position by centrifugal force.

Fig. 4 shows sectional elevation, and Fig. 5a plan, of an arrangement of rotary mold-box for casting projectiles from metal under pressure.

In this box, K K are the molds for the projectiles. These molds are formed in sand, with open ends, and arranged so that their axes radiate from the center of motion. In rear of the open end of each mold is a cylindrical extension, L, which forms a guide for the reception of a cylindrical plug or core of metal, M, that serves to close the end of the mold. These plugs or cores are held up to the molds by centrifugal force during the casting of the projectiles and. setting of the metal.

The cover 0 of the mold box G has formed in it runners 0, leading from the central opening, 0, which runners are continued into the sand, so as to supply the molten metal to the extreme end of the mold.

The molten metal, as it is poured into the central opening, 0, will, by reason of the cen- 5 trifugal force imparted to it, be driven, first, toward the circumference, and then into the molds, pressing back, or tending to press back, the plungers or cores, which, however, will be pressed forward by the cen- 5o trit'ugal action imparted to them. Thus the casting will be more homogeneous and free from honey-comb or blow-holes than if cast in stationary molds, and pressure being maintained on the metal while setting, it will be condensed and its specific gravity consequently increased.

Having now explained the nature of our invention, we wish it to be understood that we claim-- 6o 1. The combination, with a mold'for casting metals which is adapted to be rotated to generate centrifugal force, whereby the molten metal is carried to the outer 'ieriphery of the mold, where it solidifies, of cores or plungers which are loosely arranged within said mold, and which are forced radially outward by centrifugal force, to give shape to the inner circumference or side of the casting, substantially as and for the purpose specified. 7o

2. The combination of the mold O, and the segments 1 and wedgeshaped pieces I, contained loosely within said mold, and adapted to be moved radially ontwardby centrifugal force generated by the rotation of the mold, substantially as and for the'purpose specified.

Dated the 28th day of December, 1876.

W. H. OSBORNE TAYLOR. JOHN W. WAILES.

Witnesses:

EDWARD DAVIES, Solicitor, N cwport, Monmouth.

JOHN A. WILLIAMS, Clerk to Mr. Thos. M. Llewellinfiolicitor, Newport, Monmouth.

THos. M. LLEWELLIN, Notary Public, Newport, Monmouth.

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