US1459137A - Foundry flask - Google Patents

Description

June 19, 1923.

D. c. BARRlcK FOUNDRY FLASK Filed Aug. 17, 1922 Patented lune i9, lQZB,

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DONALD c. Bannion, or CANTON, OHIO, AssieNoR 'ro THE' oNION METAL MANU- FACTURING COMPANY, or CANTON, OHIO, AcOnroRArroN OF OHIO.

FOUNDRY FLASK.

To all lwhom t may concern:

a citizen ofthe United States, residinggat.

Canton, in the county of Stark and State of Ohio, have invented a new and useful Foundry Flask, of which the following is a specification.

This invention relatesto improvements in foundry flasks and more particularly to asks constructed of sheet metal and provided with reinforcing means to prevent the flask from warping or twisting, due to the weight of the sand and the casting molded therein.

The usual form of foundrv flask comprises two similar sections generally known as the cope and drag, provided with means for 'attaching the two sections together. These iiasks were commonly formed of wood, but owing to the molten metal and burning gases which are necessarily brought into contact with the flasks, it has been found desirable to construct the sections of the flasks off sheet metal.

Experience has proven, however, that flasks formed ofplain sheet metal do not have the required strength and rigidity to withstand the roughv usa-ge to which the ilasks are subjected, this being especially true of larger flasks such as are used for molding heavy castings. f Y

rlhe objects of the invention are to provide a sheet metal foundry iiask having longitudinally `disposed tie .rods for reinforcing and bracing thel flasky and placing a tension upon the side walls of the flask. each flask section being preferablyprovided with corrugations and the tie rods being located therein,

Similar numerals of reference indicate lug.

Application `tiled.l August 17, 1922. Serial No. 582,419.

corresponding parts throughout the drawing.V f

. ReferringA to the construction illustrated in the accompanying drawing, the body portion l of the vflask section is formed of one or more sheets of metal, the Overlapping ends thereof being connected together as at 2. This body portion of the section is preferably rectangular and provided with the spaced, longitudinal corrugations 3, which may be of V-shape, as illustrated and which extend inward.

i The upper and lower edges of the flask' section are bent inward and outward, `as indicated at 4 and 5 respectively. VThe section illustrated in the drawing is the lower orjdrag section, and it will be understood that the upper or cope section is of the same form, being inverted, however, before lit is placed upon the drag section. .i

` The `usual* trunnions 6 may `beconnected as by the rivets 7 to each side of the 4flask section and the pin lugs 8 may be connected to they ends as by the rivets 9, these pin lugs being of usual construction and` provided at the upperedge of the drag section and at the lower edge of the cope-section, the usual guide pins being placed through the registering apertures 10 ofthe pin lugs.

The U-shaped sheet metal member 11, provided with outwardly pressed corrugations 12 registering with 'the corrugations 3 of the body member, is locatedj around each endj of the iiask section and may be provided with the outwardly curved portion 13 to accommodate the adjacent pin Bosses 14 are provided at the cornerportions of each of the U-shaped members. being attached tothe corrugations 12. each of said bosses having a central bore 15 registering with an aperture lthrough the ad-y jacent corrugation 12, of the Ushaped member. n'

Tie bars 17, are located within the corrugations 3Y of the yiiask section and extend through lthe bosses 14, the extremities of said tie bars being threaded to receive the nuts 18 byy means of which the U-shaped Vmembers 11 are drawn toward each other,

thus clamping them upon the body portion of the flask, and placing a pressure upon the side walls 19 of the flask, causing said side walls to be slightly bowed, as shown in F ig. 1 of the drawing.

If desired, the curved portions 13 of thev U-shaped members may be omitted and the pin lugs may be connected to the outer faces of the U-shaped members instead of directly to the body portion of the flask, as these curved portions 13 aremerely prol vided as a protection to the pin lugs to by eliminating the corrugations or by increasing the length of the legs of the Us i shaped members, the invention residing in the connection of the U-shaped members to the body portion of the flask by means of the tie bolts which place sufficient pressure upon the side walls of the flask to produce a camber which will sustain the same against distortion due to the weight of the sand and castings placed therein, and which will prevent crushing or bending of the flask from blows or rough handling. y

Asthe camber is produced in the side walls of the flask due to the pressure at opposite ends within the edges of the side walls, there may be a tendency t'o bow the end walls inward andto overcome this, the

'i end walls may be normally bowed slightly outward as indicated in dotted lines at 20 in Fig. 1, thus permitting said end walls to be flattened under pressure as shown in full lines. v

` I claim 1. A foundry flask comprising a rectangular sheet metal body portion, reinforcing plates upon opposite sides of the body and tie rods connecting said reinforcing plates.

2. A foundry ask comprising an oblong body portion, reinforcing` members at the ends thereof and 'tie rods connecting said reinforcing members. l

3. A foundry flask comprising a rectangular body portion provided with longitudinal corrugations, reinforcing members at opposite sides of the body portion and tie rods connecting the reinforcing members and lo-- cated within thev corrugations. l

4.' A foundry flask comprising an oblong sheet metal body portion provided with longitudinal corrugations, reinforcing members at the ends of the body portion and tie rods connecting the reinforcing members and 'located within said corrugations.

' 5. A foundry flask comprisinga rectangu` lar sheet metal body portion having longitudinal corrugations, U-shaped plates surrounding opposite sides of the body portion and tie rods connecting said U-shaped plates and located within the corrugations.

6. A foundry flask comprising a rectangular sheet metal body portion, U-shaped plates surrounding opposite sides of the body portion and tie rods connected to the Ufshaped plates.

7. A foundry flask comprising an oblong sheet metal body portion, U-shaped members surrounding the endsof the body portion.

bers surrounding opposite sides of the body portion and provided with corrugations and Y tie rods connecting the U-shaped members and located in corrugations.

10. `A sheet metal foundry flask comprisingan oblong body portion, U-shaped mem-V bers surrounding opposite ends ofthe body portion and provided with corrugationsand tie rods connecting the U-shaped members and located in the corrugations. y f

11. A foundry flask comprising 'a rectanf gular sheet metal body portion having, pin lugs upon opposite sides, reinforcin membersupon said sides ofthe body portion and provided with offset portions receiving the Y pin lugs and tie rods connecting the -rein'- forcing members. y l

12. A foundry flask comprising an oblong sheet metal body portion provided with pin lugs upon opposite ends, Uy-shaped reinforcing members surrounding the ends ofthe body portion and provided with off-set portions receiving the pin lugs and tie rods connecting the U-shaped members.

13. A foundry yflask comprising a sheet metal body portion, reinforcing .members upon opposite sides of the same and Vtie rods connecting the reinforcing members'. X y

14;. A foundry flask comprising, asheet metal body portion, reinforcing members upon opposite rsides of the sameV and' tension means connecting the reinforcing members.

body portion, and means for drawing said U-shaped members toward each other. y

18. A foundry flask comprising e rectangular sheet metal body portion, reinforcing 5 members upon opposite sides of the body portion, tie rods connecting the reinforcing members and means upon the tie rods for drawing the reinforcing members toward each other to place a tension upon the side -10 walls of the body portion.

19. A foundry ask comprising an oblongl sheet metal body portion, U-shaped members surrounding opposite ends of the body portion, tie rods connecting the U-shap'ed members together and means upon the tie rods Jfor drawing the U-shaped members toward each other to place a tension upon the side walls of the body portion.

DONALD v C.,BARRICK.

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