US1223775A

US1223775A - Ingot-mold.

Info

Publication number: US1223775A
Application number: US11300216A
Authority: US
Inventors: George A Dornin
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-08-03
Filing date: 1916-08-03
Publication date: 1917-04-24
Anticipated expiration: 1934-04-24

Description

G. A. DORNIN.

INGOT MOLD.

APPLICATION FILED AUG-3. ma.

i xi

2 geowfge jar aim Patented Apr. 24, 1917.

2 SHEETS-SHEET I.

.YGIA. DORNIN.

INGOT MOLD.

APPLICATION FILED AUG.3. 1916. 7 1,223,?75., Patented Apr. 24,1917.

2 ETSSHEEI 2.

" Ego GEORGE A. DORNIN, 0F BALTIMORE, MARYLAND.

' ING-OT-MOLD.

' Specification of Letters Patent.

Patented Apr. 24, 191%.

Application filed August3, 1916. Serial No. 113,002.

To all whom it may concern: I

Be it known that I, GEORGE A. DORNIN, a citizen of the United States, residing in Baltimore, Maryland, have invented certain new and useful Improvements in Ingot- Molds, of which the following is a specification.

This invention relates to improvements in the construction of ingot molds and especially to that class of such molds in which the larger part of the mold is uppermost. Molds of this kind are generally open at top and bottom, the bottom being closed while casting either by means of a stool on which the mold rests and which is some times provided with a short projection which enters the opening in the bottom of the mold, or by what is known-as a stripping plug which serves the double purpose of closing the bottom opening and of also detachmg; the ingot from the mold at the com-,

mencement of the stripping operation.

The object of my present invention is to efficiently seal the bottomportion of the mold chamber in such manner as to prevent the escape of metal therefrom and to do this in a most simple way.

I have demonstrated that the bottom opening of the mold may be efficiently sealed by a plate of sheet metal where such plate is properly supported in the mold cavity above the bottom opening of the mold. In such casethe leakage of molten metal around "the edges of the plate is quite small and ordinarily is insuilicient to be material, but in order to prevent any leakage I sometimes interpose refractory sealing material between the plate and the stool or directly between the plate and that portion of the mold walls which support it. The plate which I employ serves the purpose of sealing the bottom opening of the mold and it also covers the mold stool and. therefore prevents the molten metal from sticking to the stool and where .rerractory material is employed it prevents such material from coming into direct contact with the ingot and reduces to a miniinum the passage of steam or gases from the refractory material to the ingot.

In the accompanying drawings,

Figure 1 is a plan view of an ingot mold ith my improvements applied.

Fig. 2 shows a vertical central section t ereof on the line 2-2 of Fig. 1.

Fig. 2 is a detail view in vertical section showing a modification.

Figs. 3, and 4 are detail views in vertical section each showing a slightly modified form of the invention.

Fig. 5 is a view similar to Fig. 3 showing a further modification in which refractory material is placed in the bottom opening of the mold between the stool and the plate.

Fig. 6 is a view similar to Fig. 5 but showing how a stripping plug may be arranged in the bottom opening of the mold.

Fig. 7 is a perspective view of one of the plates employed.

Fig. 8 is'a perspective view of a strip of sheet metal from which the individual plates are cut.

The mold A shown in Figs. 1 and 2 has a cavity larger in diameter at top than at bottom and it is formed with a necked-in portion a and a bottom opening a. There is a rounded portion a surrounding the bottom opening of the mold in order to avoid the presence of sharp angular projections. The bottom opening a is preferably made circular, as shown, and the mold rests on a stool B in the usual way. A sealing plate C, which is preferably made rectangular in outline and which'is of larger area than the bottom opening a, completely covers said opening. Said plate is supported near its edges by the lower portion of the walls of the mold cavity and it is possible to so form or finish the supporting portions of the mold walls and to so support the plate as to practically prevent the leakage of molten metal, or the passage thereof onto the stool and out between the stool and the bottom of the mold in such manner as to form fins. Preferably the lower portion of the walls of the mold cavity are recessed, as indicated at 0: forming a ledge a on which the plate rests. This recess a is rectangular in outline corresponding in shape to that of the sealing plate. In such construction, when the mold is-teemed, the molten metal covers the sealing plate and such metal as comes in contact with the necked-in portion of the mold is directed upwardly and the formation in the mold walls of recesses with reentrant angles is prevente The plate prevents the molten metal rom striking the mold stool or from filling the bottom opening and sticking to the stool and it also, as before stated, prevents the leakage of wise pass upwardly into molten metal through the opening in such manner as to form lateral fins. When the mold is stripped the sealing plate adheres to the ingot and is removed from the mold therewith.

While, as before stated, there'is little leakage in a construction such as shown in Figs. 1 and 2,1 may, as indicated in Fig. 2, interpose between the ledge (11* and the plate refractory sealing material a It will be observed that this material does not surround the edges of the plate but lies beneath the plate, therefore very little if any of such material comes in contact with the. bottom of the ingot and there is little, if any, formation of steam or gases w the molten metal. lhere are many ways in which my invention may be embodied. Some of these are illustrated in other figures of the drawing.

In Fig. 3, instead of forming the neckedin portion, as indicated in Fig. 2, the mold cavity merely tapers downwardly and is formed at b with a flat ledge surrounding the bottom opening a of the mold. Sealing material I) may be introduced between this ledge and sealing plate.

lln Fig. t the mold cavity has ed lower portion provided with a portion a surrounding the of the mold and on this portion the sealing plate is supported, refractory material 0 being preferably interposed between the part c and the plate C.

ln hi 5 the mold cavity is formed with a necke -in portion a and with a ledge a similar to that shown in Fig. 2. The plate C is supported on the ledge 00 and sealing material a may be interposed between the plate and the ledge but in this instance refractory sealing material l) is placed in the bottom opening of the mold on the stool ll. Should any metal leak under the sealing plate it will be prevented by the material D from assing outwardly between the stool and the ottom of the mold in such manner as to form fins. Where the sealing material D is thus used it is generally not necessary to use a seal such as a if it be desired to employ a stripping plug to raise the ingot in the mold preliminary to its being stripped therefrom, 1' preferably employ a construction such as shown in Fig.

a roundflattened bottom opening "6. ln this case the stool B is termed with an opening at and the bottom opening oi oi? the mold is suitabl shaped to receive the stripping plug E. he mold cavity is necked-in at a: as before and it is formed with a ledge a similar to that before described. The plate (1 rests on this ledge and between the plate and the plug is interposed sealing ma.- terial 6 There is no sealing material around the edges of the plate, but such material is disposed wholly below the plate and does not come in contact with the ingot.

hich would other' Any molten metal which by chance should find its way around the edges of the plate is arrested by the sealing material. Therefore the wedging or cramming of the plug in the mold is entirely prevented.

I am aware that in a tion filed by Mr. Emil Gathmann, an ingot mold is shown, described and claimed, in which the mold cavity is necked-in at the bottom and is provided with a rounded portion between he necked-in part of the mold and the bottom opening thereof. Such application also shows a sealing or stripping plug in the bottom opening and a sealing plate which closes the bottom opening of the mold and rests on the mold walls just above the bottom opening. 1 do not, therefore, claim such subject matter in my application.

I claim as my invention:

It. An ingot mold having a bottom opening, a sealing plate of larger area than the bottom opening of the mold covering the same and supported by the walls of the lower portion of the mold cavity above the bottom opening, and refractory sealing material interposed between the plate and those portions of the mold walls which support it.

2.. An ingot mold having a bottom opening, a stool on which the mold is supported, a sealing plate of larger 'area than the bottom opening of the mold covering the same and supported by the walls of the lower portion of the mold cavity above the bottom opening, and refractory sealing material interposed between the stool and the plate.

3. An ingot mold having'a bottom opening and a sealing plate of larger area than the bottom opening of the mold covering the same and supported by the walls of the lower portion of the mold, and sealing material pending applica applied beneath the plate on the mold walls near the edges of said plate.

l: An ingot mold having a bottom opening surrounded by a flattened ledge and a sealing plate onto which the molten metal is poured oi larger area hen the bottom openiing covering the same and supported by said ed e.

5 An ingot mold having a circular bottom opening surrounded by a ledge oi rectangular shape and a rectangular sealing plate oi" larger area than the bottom opening coverlng the same and supported by said ledge.

6. An ingot mold having a bottom open ing surrounded by a plate-receiving recess and a sealing plate of larger area than said opening and seated in said recess.

7. An ingot mold having a bottom opening surrounded by a plate receiving recess, a plug mounted in said bottom opening, and a. seallng plate of lar er area than said opening and seated in sai recess 8. An ingot mold having a bottom opening surrounded by a plate-receiving recess,

sealing plate of larger area than the bottom Opening and supported in said recess, and refractory sealing material interposed between the bottom of the plate and the bottom of said recess.

9. An ingot mold having a bottom opening, a sealing plug mounted therein, a sealing plate of larger area than the bottom opening supported on the mold Walls above said opening and above the plug, and refractory material interposed between the plate and the plug.

10. An ingot mold having a necked-in lower portion formed With a bottom opening and With a plate receiving recess sura recessed portion surrounding said bottom 20 opening and provided With a ledge and a seal.-

ing plate in said recess supported on said ledge.

In testimony whereof, I. have hereunto subscribed my name.

GEORGE A. DORNIN.

Witnesses:

RALPH C. SHARRETTB, J. RAYMOND HUGHES.