US1387293A - Method and means for billet-casting - Google Patents

Description

C. S. MORSE.

METHOD AND MEANS FOR BILLET CASTING. I

APPLlcATloN rlLzn'mLY 26. |9205 Patented Aug. 9,1921,o

S 7 '8 f f1. Y

n Inventar UNITED STATES PATENT' OFFICE.

` CHARLES S. MORSE, OF ROLAND PARK, MARYLAND, ASSIGNOR T BALTIMORE TUBE COMPANY, INCORPORATED, A. CORPORATION OF VIRGINIA.

METHOD AND M EANS 'FOR BILLET-CASTING- v Application led July 26,

modifications of the invention described in print my copending application Serial No. 387,348 filed June 8, 1920.

- The invention comprises a mold and a rel-v atively movable tapered ocre for; coperating therewith. The core is adapted to have its smaller end at or near the bottom of the mold when in initial position for pouring. As the molten metal rises in the mold the core is usually withdrawn from the mold due to a relative movement `between the core and the mold The lower or smaller` end of the core only passes the top of the mold after the completion of the' pouring operation.

Referring tothe drawings which illustrate merely by `way of example suitable means for eiectmg my invention Figure 1 is a view in longitudinal section showin the parts in position at the beg'im ning o the casting operation. j

Fig. 2 is a similar view of the mold, showing theJ lower end of the core, which is y nearly withdrawn from the mold at or near the completion of the pouring operation.

Fig. 3 is a longitudinal sectlon 'ofa modiiication in construction. p l

Similar numerals refer to similar parts throughout the several views.

The mold element' is adapted to be sup- 'llorted by any suitable means notshown.

his mold element is` provided at the top`v with a removable pouring funnel 6 andat the bottom with a removable block or print 7, held in place by the bolt 8. AThe core 9 is shown as tapering downwardly and projecting to a point near the bottom of the mold, but s aced away from the surface of the g. The upper or larger end of the eore 9 is guided and held in relatively central position, with respect to the mold 5 by the sleeve 10, forming part of the pouring funnel 6. This core 9 1s adapted to be connected by the coupling 11 with the piston rod 12 of a piston or plunger, operatmg' 1n the cyl- Specification 'of Letters Patent.

1920. Serial No., 399,152.

inder 13. Said piston orv plunger being` moved by a pressure medium introduced into the cylinder by any suitable ymeans not shown.

In operation the metal is vpoured throu hA Patented Aug.9',1921. y

the funnel 6 into the space 14, between t e j mold 5 and the core 9, and the core' is withdrawnl from the mold by the operation of pending application.

The molten metal when it comes in condrawn therefrom and untilfthe body of the castin solidiies. I

In i 2, I show the core nearly withdrawn rom the mold. ThisI indicates the approximate relative position of the lower end of the core with respect to the level of the molten metal as the casting progresses. It will be understoodthat the entire casting is poured and completed to approximately the top of the mold, before the lower end of the core reaches the top of the mold.

It will be noted that by this method of vproceeding the core is permitted to be entirely withdrawn from the mold very shortly after the completion of the curing', so that'the time or period required or casting is reduced to a minimum.

After the core has been entirely removed from thevmold and the casting has become completely solidified, the pouring funnel 6 andthe print 7 are removed from the mold, and the casting is ejected therefrom in the usual Way. y

By he arrangement shown in Fig. 1, in which the bottom of the core is spaced from the upper or partially surrounding surface of the print, t

e casting formed is closed at lits lower end; this form of casting being 1-00 ment, and causing relative continuous movement between the mold element and the core to cause the withdrawal of the core from the mold, during the pouring operation said movement bemg timed so that the lower end of the core shall be maintained below the level of the molten metal until the pouring has been completed.

2. The combination of a mold element and cooperating core tapering downwardly toward the bottom of the mold element, and means for causing continuous relative movement between the mold element and the core to cause the withdrawal of the core from the mold, during the pouringr operation and so that the lower end of the core shall be maintained below the level of the molten metal ward the bottbm of the mold element, means for supporting the core so that its lower' end in initial position shall be spaced from the bottom of the mold element, and means for causing continuous relative movement between the mold element and the core so that the core shall be withdrawn from the mold element relatively to the pouring operation.

4. The combination ot a mold element and coperating core tapering downwardly toward the bottom of the mold element, and means forcausing continuous relative movement between the mold element and the core so that the core shall be withdrawn from the mold element during the process of pouring but shall not entirely leave the mold element until the completion of the pouring operation.

CHARLES S. MORSE.

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