US2223563A - Foundry flask - Google Patents

Description

Dec. 3, 1940. HI 2,223,563

I FOUNDRY FLASK Filed Dec. 31,- 1958 2 Sheets-Sheet 1 VENTOR. JAME HINES ATTORNEY.

Dec. 3; 1940- J. F. HINES 2,223,563

FOUNDRY FLASK Filed Dec. 51, 1938 2 Sheets-Sheet 2 INVENTOR. JAMES F HINES ATTORNEY.

Patented Dec. 3, 1940 PATENT OFFICE FOUNDRY FLASK I James F. Hines, Lakewood, Ohio, assignor to Hazel K. Hines, Lakewood, Ohio Application December 31,1938, serial No. 248,668

.. 4 Claims.

This invention relates to a foundry flask and is particularlyv intended for use with modern synthetic molding sands which are generally thrown into the flask by a sand-slinger and pack so hard and firmly as to'make removal from a rigid flask difficult, if not impossible. These so -called synthetic sands usually consist 'of a sharp natural sand mulled dry with. talc, which bonds hard when wet but with'a glue like quality which makes it very difficult toremove from the flask because it does not slip readilyupon the flask sides. Therefo'rethe flasksides have to be separated from the mold by a lateral motion before the mold can be removed."

Sometimes oil is sprayed on patterns or flask walls to overcome this stickiness, but more positive and satisfactory results are obtained by moving the flask walls laterally outward to break the adhesion before the operator starts to lift the flask. Sometimes the sides of the flask are struck with a hammer for such loosening but this obviously is likely to injure the, mold, particularly if it has interior hangingparts.

'My invention provides 'a lateral opening arrangement whereby the flask walls can'be unlocked and will thereupon separate from the mold sides and break-the adhesion. A further purpose of my invention is to give the flask a degree of rigidity and accuracy of size not hitherto obtainablein a separable-wall flask, to insure that the sides will beaccurately aligned when again brought togethenfandto protect against sand interfering with accurate closing or damaging certain guide elements.

The principles of the present invention are applicable to flasks which are generally'standard in their characteristics and thus not limited to any specific flask wall construction or specific material. Such flasks may be provided with sand strips, means for holding the flasks in vertical registry when cope and drag are assembled, and other standard fittings. v i

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims. I

The annexed drawings'and the following description set forth in detail certain structure embodying the invention and method of making the same, such disclosed means constituting, however, only preferred specific embodiments of my invention. 4 1

In the accompanying drawings:

Fig. 1 is a perspective of two of myimproved flasks assembled but empty 1 Fig. 2 is a reduced scale elevation of a' corner of one flask only, viewed approximately as indicated by the arrows 2-2 of Fig. 1, and showing the halves separated;

Fig. 3 is a horizontal section on a larger scale showing a corner locking detailand also showing part of the method of construction, the view being downward on plane 3-3 of Fig. 2 with some elements in plan;

Fig. 4 is a horizontal section on plane 4-4 of Fig. 2, with some parts in plan, and taken during construction; 7

Fig. 5 is an enlarged perspective illustrating the application of certain elements during manufacture;

Fig. 6 is the same section as Fig. 3, but with construction elements removed and flask halves separated;

t Fig. 7 is a view corresponding to Fig. 6 but illustrating a modified dowel, and with flask ihalves closed;

Fig. 8 is a'horizontal section through the com- 1 pleted flask on plane 4-4 of Fig. 2, showing the locking means, with halves closed;

Fig. 9 is an enlarged fragmentary vertical section on the plane 9-9 of Fig. '1, with certain elements omitted for simplicity; v

Fig. 10 is an elevation of an adjustment lock, the view being indicated by the arrows I 0I0 of Fig. 2;

Fig. 11 is a perspective of the opening cams, complementary halves separated for better illustration; v i t a Fig. 12 is a fragmentary sectionalized perspective of an alternative dowel fitting, also showing the manufacturing method; and

Fig. 13 is an elevation illustrating in diagrammatic style the cam positions corresponding to the closed and opened flask respectively.

Referring now to Fig. 1, element! is a cope and element 2 a drag, both being snap flasks to which my invention is applied. To dispose of incidental matters it will be mentioned that the cope is equipped wth conventional sand strips 5, moved by thumb levers 6, and that the drag is aligned on the cope by conventional pin fasteners "l.

t The cope and the drag are each vertically parted at diagonally opposed corners, the parting plane being indicated by reference character 9, Figs. 1 and 2. Dowelsl I, Figs. 3 and 6, or l2, Fig. 7, align the halves, while locking bolts l3 keep them together.

The bolts pass freely through holes in the flask corners and-also through crown cam elements 14 (not threaded) each secured to the side of a corner with corresponding sockets in the other element, said sockets limiting the penetration of walls of said corners, and means for limiting withdrawal of said dowels from their sockets and for closing said flask.

4. A foundry flask comprising, in combination,

walls vertically separated at opposin corners 5 and dowels engaging opposing sockets in each of said walls, said sockets limiting the penetration of said dowels in each of said walls and being formed by casting molten metal upon said dowels, said dowels and sockets being housed in 10 the flask walls of said corners.

JAMES F. HINES.

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