US1195802A

US1195802A - Casting

Info

Publication number: US1195802A
Authority: US
Publication date: 1916-08-22
Anticipated expiration: 1933-08-22

Description

J. A. & D. S. GARDNER.

CASTING APPLIANCE. APPLlCATlON FILED OCT-22,1915.

I Patented Aug. 22, 1916.

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JOSEPH A. GARDNER AND DAVID S. GARDNER, OF MEIHPHIS, TENNESSEE.

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Specification of Letters Eatent'.

Patented Aug. 22, little.

To all whom it may concern:

Be it known that we, JOSEPH A. GARDNER and DAVID S. GARDNER, citizens of the United States, both residing at Memphis. in the county of Shelby and State of Tennessee, have invented certain new and useful Improvements in Casting Appliances; and we' do hereby declare the following to be a full, clear, and exact description of the invention, such as will'enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in casting appliances, and consists more particularly in an improved. flask, together with a former for molding the inipression form in the investment material poured therein; said flask be ng constructed in one piece and the combined mold and ladle contained therein being without Jo nts of any kind, the molding being accomplished in a single operation.

The improved flask containing the combined mold and ladle, as constructed n accordan'ce with the present invention, 1S designed for use more particularly in the centrifugal casting machine, for which we have filed an application for U. 8. Patent on Oct. 22, 1915, Serial No. 57 ,343; it being understood, however, that the improved appliance may be employed in other forms of casting machines. D

The primary object of the present invention is to provide a mold and ladle for forming dental, jewelers, or other castings, wh ch will be constructed integral, dispensing with a joint therebetween as is now commonly had, and through which the recious metal has been found to escape; an the fire-proof investment material is arranged to be molded about the wax, or other impress on form, in a single operation by coiiperation of a former constructed with an integral core and peak for imposing the necessary formation therein to produce a substantially conical depression in the mold leading to the sprue, and through which the molten metal will be forced from the ladle when placed in the centrifugal machine.

With these and other objects in view. the invention consists in the novel details of construction and combinations. of parts more fully hereinafter disclosed and particularly pointed out in the claims.

In the accompanying draw ngs torininga part of this application, and in which similar reference symbols indicate corresponding parts in the several views: Figure 1 is a side elevational view of the improved apphance including the former and flask as constructed in accordance with the present invention, and assembled in readiness to rece ve the fire-proof investment material. Fig. 2 1s a vertical sectional view of the same. Fig. 3 1s a perspective view of the improved former. Fig. 4: is a perspective view of the improved flask, before the investment material has been received therein. F 1g. 5 1s a perspective view of the improved flask containing the combined mold and ladle showing the appliance ready to be mounted in a castin machine; and Fig. 6 is a longitudinal sectional view taken on the l ne 66 in Fig. 5, and looking in the direction of the arrows. I

Referring more particularly to the drawings, the improved former is advantageously constructed or aluminum, or other suitable material, arranged. to provide a flask and pattern support or solid body 1 ofsubstam tially semi-cylindrical exterior configuration, as more particularly seen in Fig. 3, and having inclined faces 2 and 3 for receiving and supporting the longitudinal edges of the flask, as hereinafter more. particularly explained. V

The support is provided substantial l; centrally with a ladle pattern or core 4 extending longitudinally of the same, and merging at its lower end into a base 5, preferably of the circular form shown, and upon which the appliance as a whole rests. The upper end of the core i is extended beyond the end wall 6 of the support to pro' vide an integral peak 7 forming a continuation of said core and pro'ecting substantially centrally into the flask ring, as shown in Figs. 1 and 2 to produce an approximately conical depression in the mold in a manner presently more fully described.

In the peak 7 is a perforation for receiving the'sprue wire or pin 8 upon which the wax or other impression form 9 has been impaled, and which su ports the latter within the flask ring in su stantially the position shown in Figs. 1 and. 2. The end wall 6 of flask on the pattern support with the longitudinal edges of the flask engaging the faces. 2 and 3 'of the support 1, and the outer transverse end-resting upon the base 5.

a As more particularly disclosed in Fig. 4,

- the moldcavity., A flange 16 is turned up plianee.

in accordance with our invention, the flask ring 11 is approximately of cylindricalform, and is constructed-of metal, or other suit able material, formed in one piece with the ladle receiver 12, which is advantageously of substantially the semi-cylindrical configuration illustrated, and projects from one end of the flask ring 11, forming an unbroken continuation with the respective wall thereof, dispensing. with the necessity of any joint therebetween through which the precious metal could find its way.

The combined appliance is shown in the completed condition ready for mounting in the centrifugal machine in Fig. 5, where the investment material 13 is molded in place ,with a cavity 14 constituting the ladle and occupying the ladle receiver 12 for receiving the precious or other metal, and a commumcating, substantially conical, depress1on 15 in the mold in the flask ring 11 conv'ergmg centrally toward the sprue hole leading to from the outer transverse edge of the ladle flask 12 and forms aniabutment against which the investment material 13 is molded, and presents a smooth surface to the hand of the operator when man pulating the ap- In the operation of the improved appliance as above described, the former, such as shown in Fig. 3, is placed in the upright position shown in Figs. 1 and 2, with the base 5 resting upon the table or other support.

The flask, in the condition shown in Fig. 4, is thereupon inverted and placed over the former in that manner shown-in the drawing with the flange 16 resting upon the base '5,

" .serted'in the perforation in the peak 7 of the core 4, or said form may be inserted in such position prior to the assembly of the flask upon thes upport, as found necessary or desirable. The fire-proof investment material is thereupon poured in the upper end of the flask ring 11, as shown in Figs. 1 and 2, and permitted to crystallize, the core 4 imposing the cavity 14 in the ladle molded within the receiver 12 of the flask as disclosed in Figs. 5 and 6, and the peak"? the depression 15 in the investment material in the flask ring 11, also advantageously illustrated in these figures.

After the material 13 has suificiently har dened the flask is removed from the support, simultaneouslywithdrawing from the perfora'tion in .the peak 7 the wax impression form 9 and pin 8, which latter will project at the apex of the conical depression 15; and

the result will be substantially the device in.

Fig. 5. This device is ready for placement in the centrifugal machine, whereupon precious or other metal will be placed in the cavity 14 in the ladle andthe; same reduced to a/molten condition, by application of a flame, and the wax form destroyed, followed by the removal of the sprue pin 8.} 'The op eration of the centrifugal machine will constrain the inolten metal to flow from the cavity 14' into the depression 15 in the mold, and thence through the central sprue hole to the mold cavity in a manner which will now be well understood.

The improved flask containing the combined mold and ladle, as above described, is

. adapted for readyinsertion and removal in the centrifugal casting machine described and illustrated in our application aforesaid; and the same may be advantageously used 1n other forms of casting machines without departing from the spiritof the invention, which resides primarily in constructing the mold anddadle in a single piece with no joints in order to prevent the escape and waste of metal.

It is obvious that those skilled in the art may vary the details of construction and arrangements of parts without departing from the spirit of our invention, and therefore we do not wish to be limited to such features except asmay be required by the claims.

We claim.

1. A casting appliance including a one p ece flask compr sing a combined ring and substantially semi-cylindrical ladle receiver without joint therebetween, investment ma terial cast in said flask to provide a mold in the ring having a cavity and a sprue leading' to the cavity, and a ladle in the receiver formed with an elongated trough having a bottom extending appreciably below said sprue and inclining from' opposite ends downwardly toward the center to collect the molten metal in quantities therein, said with the sprue leading tothe mold cavity in said rlng, substantially as described.

2. A casting appliance including a flask comprising a ring and a ladle-receiver, in vestment material contained within said' ring and ladle-receiver constituting a onepiece mold and ladle without joint therebetween, said mold having-a sprue leadin to the mold cavity and a depression in the ace thereof adjacent said ladle, said ladle having an elongated trough extending substantially throughout its length beneaththe level of the lowerpart of said vdepressionjic'or retrough in the ladle being in communication ceiving the metal and retaining the same in a molten state. therein until brought under the influence of centrifugal action in a casting machine, substantially as described.

3. A casting appliance including a onepiece flask, comprising a ring, and a ladlereceiver extending from one end of said ring and forming an unbroken, continuous unit therewith; investment material in said flask providing a mold in the ring and a ladle in the receiver merging together to form a jointless, integral Whole; said ladle being substantially semicylindrical and providing an elongated trough for receiving the metal and holding it therein in a molten condition; said mold havin a cavity disposed at an appreciable height above the trough in said ladle, a substantially horizontally-extending sprue communicating with said cavity, and a substantially conical depression having its apex in the sprue and merging at its lower part downwardly to meet the adjacent. end of the ladle trough, substantially as described 4. A casting appliance including a flask composed of a ring and a ladle receiver adapted to contain investment material for constituting a mold and ladle, and a flange on the outer end of said ladle receiver pro jecting inwardly to form an abutment against which the investment material is molded, substantially as described.

5. An improved casting appliance including a flask comprising a cylindrical ring, a ladle receiver constructed in one piece with said ring and extending from one end thereof, said ladle receiver being substantially semi-cylindrical, and a flange turned up from the outer end of said ladle receiver, substantially as described.

6. A casting appliance including a flask composed of a ring and a ladle receiver adapted to contain investment material for constituting a mold and a ladle, means for supporting said ring and said ladle during the molding operation, a pattern on said supporting means extending into the ladle receiver for molding a ladle therein from the investment material, and an extension on said pattern projecting into said ring for producing a depression in the investment material therein leading to the mold cavity, substantially as described.

7. A casting appliance including a flask comprising a ring and a ladle receiver constructed in a single piece, and a support for said flask including means for holding said flask, a pattern on said supportextending into the ladle receiver, and an integral peak on said pattern extending into the ring for molding a combined ladle and mold in a single operation, substantially as described.

8. An improved casting appliance including a flask constructed of a ring and ladle receiver in a single piece, and a support for receiving one edge of the ring and including a flange for receiving one edge of the ladle receiver, a pattern on said support extending into the ladle receiver, and a peak on said pattern and extending into the ring for molding a combined ring and ladle in a single operation, substantially as described.

9. A casting appliance including a flask comprising a ring and ladle receiver constructed in a single piece, and a support for said flask including a body having a slot for receiving the adjacent edge of said ring, a

flange for receiving the edge of said ladle receiver, and an integral core and peak on said support extending into the ladle receiver and ring for molding a ladle and mold in a single operation, substantially as described.

In testimony whereof, we affix our signatures'.

JOSEPH A. GARDNER. DAVID S. GARDNER.