US1335564A - Foundry-flask - Google Patents

Description

H c. DRUMM.

FOUNDRY FLASK. APPLICATION FILED APR. 17, 1919.

1,335,564; I Patented Mar. 30, 1920,

2 SHEETSSHEET 1- 11v VEN TOR.

' ATTORNEYS.

H. 0. DRUMM FOUNDRY FLASK.

APPLICATION FILED APR.|7,1919- 1.,S35,56%, Patented Mar. 30,1920.

I 2 SHEETS-SHEET 2. l6v

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HERBERT c. DRUMM, or CANTON, oirro, nssieno-a r0 'rnnnivroniun'rnn MANU- FAOTURING COMPANY, or enrrron, OHIO, A coerce-Arron OF OHIO.

' FOUNDRY-FLASK.

menace.

Application filed April 17, 1919. I

To all whom it may concern:

Be it *known that I, HERBERT C; DRUMM, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a new and'useful lloundry-Flask, of which the following is a specification.

The invention relates to improvements in foundry-flasks, constructed of sheet metal and more especially to flasks formed of sheets having. spaced outwardly pressed ribs on account of the strength of the metal in proportion to its weight, it being unnecesi to provide stiffening strips uponthe a1 flaslts as the corrugations therein prevent the usual lateral- "strains and torsional strains, which tend to twist or distort the flask.-

The object of the invention is to produce a flask formed of one or more sheets connected at their extremities and provided with outwardly pressed ribs forming said retaining grooves and to simplifyand improve the construction ofmetal foundry flasks.

A further object is to provide a foundry flask formed of sheet metal and provided with sand retaining strips of greater thickness than the body of the "flask.

A still further object is to provide a foundry flask formed of sheet-metal provided with outwardly pressed ribs located at spaced intervals and forming sandretaining grooves on the interior of the flask, the remainder of the inner walls of the flask being flat and adapted to the attachment of cope bars.

With these objects in view the invention consists in the novel construction and arrangement of parts, hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that various changes in the form, proportions, size and minor details of construction may be made within the scope of the *appended claims, without departing from the spirit or sacrificing any of the advantages'of the invention.

The invention thus set forth in general terms is illustrated in the accompanying drawings forming part hereof, in which- Figure 1 is a perspective view of the cope section of a foundry flask embodying the in vention.

Specification of Letters Pat'ent.

Patented 'Mlar; so, 1920.

SerialNo. 290,745.

Fig. 2 is a vertical transverse sectional view through ohe of the flask sections.

Fig. 3 is a longitudinal section through a portion of one of the flask sections, taken at one corner of the flask.

Fig. -l shows the cope section of a round flask embodying the invention.

Fig. 5 is a vertical, transverse section through a modified form of flask.

Figs. 6 and 7 are fragmentary sectional views of modified forms of sheets which may be used for forming the flasks.

A practical embodiment of the invention is disclosed in the accompanying drawings, forming apart of this specification in which similar numerals of reference indicate corresponding parts throughout the several views. I

T he usual form of foundry flask coinprises two similar sections known as the cope section and the drag section provided with means for attaching the two sections together. Both ofthese sections were formerly made'of wood, but owing tothemolten metal. and the burning gases with which the flasks must necessarily be constantly brought into contact, it was'found desirable that the flasks be constructed of metal, but the metal flasks heretofore in use have been provided with reinforcing or strengthening strips and with heavy frames and other strengthening means which not only in crease the weight of the flask, which is ob jectionable, but also add considerably to the cost of manufacture ofthe flasks.

The flasks to which this application pertain are formed of one or sometimes two sheets formed into the desired shape, the abutting ends of the sheets being connected together by means of attaching strips or by the usual guide pin brackets.or both. The sheets from which the flasks are formed are provided with spaced, outwardly pressed ribs which form sand retaining grooves upon the interior of the flask, the inner walls of the flask being flat except for these grooves, thus allowing of the attaching of cope bars. By forming the flasks of such sheets, each flask section is strengthened sufficiently to overcome the strains to which it is subjected while the corrugations form sand retaining grooves which tend to better hold the sand in the flask.

Referring first to the construction illustrated in Figs. 1 to 3 inclusive, the numerals l1 indicate similar members formed of metal sheets so shaped that when the two members are placed together they will form a rectangular flask section. The section illustrated in Fig. 1 is the upper or cope section and the lower or drag section is formed identically the same, the drag section being inverted, however, before the cope section is placed thereon. The corrugations 2 are spaced at intervals and extend longitudinally around the flask sections. The upper and lower extremities of the sheets from which the sections are formed are bent inwardly forming the sand retaining flanges 3.

In connecting the members together to form one complete section the abutting ends of adjacent members are placed together, as shown at l, and a flat connecting strip 5 is placed upon the inside of the section, rivets 6 being passed through said strip and the members 11 and through the guide pin bracket 7 which is located upon the outside of the flask section at the longitudinal center thereof. Each of these guide pin brackets is provided with horizontally disposed ears 8, having the apertures 9 there. in, the ears of the upper and lower sections being placed together in the usual manner, allowing the apertures 9 therein to register in order that the guide pins may be located therethrough. Trunnion handles 10 are shown located upon the guide pin brackets. It should be understood, however, that any other usual form of handle may be provided upon the flask sections.

In Fig. 4 is shown a circular flask section in which one sheet 11 of ribbed metal is bent into circular form, the edges thereof abutting at 12, a connecting strip 13 being located upon the inner side of the flask section, rivets 14 being passed through said strip and through the corrugated sheet of which the flask section is formed. T he usual guide pin brackets 15 are connected to the outer surface of each flask section and handles 16 of any suitable and well known construction are provided thereon.

In Fig. 5 is shown a modified form of the construction especially adaptable to extremely large flasks upon which there is an excessive strain. In this form of flask the corrugated sheet 17 of which the flask section is formed is not provided with the integral sand retaining strips, but instead angle irons 18 or other structural forms of slightly heavier metal than the sheet 17 are riveted or spot welded or otherwise attached to the upper and lower edges of the corru gated sheet as shown. By forming the sand retaining strips of structural forms heavier than the sheet metal from which the flasks are formed several advantages are had, these angle'irons or other structural forms produce a reinforcement at the parting line thus giving a better parting line in the mold. Further, a heavier wearing surface is produced which is in itself a great advantage as owing to the excessive wear upon the sand strips, these parts soon become worn extremely thin.

In Figs. 6 and 7 are illustrated modified forms of rolled sheets which may be used to form the flasks. In Fig. 6 the sheet is provided at spaced intervals with outwardly pressed V-shaped ribs 18 and in Fig. 7 with outwardly pressed tapered angular ribs 19. Either of these forms will give the same advantageous results as the other form of sheet metal above described as with either the interior of the flask is flat for the attachment of cope bars while spaced sand retaining grooves are provided upon the interior of the flask and the ribs reinforce the flask body. I

I claim 1. A foundry flask formed of sheet metal. spaced outwardly pressed ribs formed in said sheet metal forming sand retaining grooves upon the interior of the flask, the remainder of the interior of the flask comprising intervening flat portions of greater width than the grooves.

2. A foundry flask section formed of sheet metal and structural forms, of heavier material than the sheet metal, connected to the upper and lower edges thereof.

3. A foundry flask constructed of a sheet of metal provided with spaced outwardly pressed ribs and intervening flat portions of greater width than the ribs, sand retaining strips formed at the upper and lower edges of said section, the ends of the sheet being abutted together and an attaching strip located upon the inside of the flask adjacent the abutting edges and connected thereto.

1. A foundry flask section constructed of sheet metal provided with an outwardly pressed rib and flat portions of greater width than the rib.

5. A foundry flask section constructed of sheet metal provided with an outwardly pressed rib forming a sand retaining groove upon the interior of the flask, flat portions of greater width than the rib and horizontally disposed flanges upon the upper and lower edges of the section.

6. A foundry flask section constructed of sheet metal provided with spaced outwardly pressed ribs and intervening flat portions of greater width than the ribs and an inwardly pressed sand retaining flange upon the lower end of said flask.

In testimony that I claim the above. I have hereunto subscribed my name.

HERBERT C. DRUMM.

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