US1122321A - Foundry-flask. - Google Patents

Description

I. B. SMITH.

V FOUNDRY FLASK.

APPLICATION FILED AUG.25, 1914.

1,122,321, Patented Dec 29, 1914.

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IRVING- R. SMITH, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO STERLING vINI-IEELF BARROW COMPANY, OF MILWAUKEE, WISCDNSIN, A CORIBQRATION OF WISCONSIN.

FOUNDRY-FLASK.

Specification of Letters Patent. Patented De 29, 1914 I Application filed August 25, 1914. Serial No. 858,467.

To all whom it may concern:

Be 1t known that I, IRVING B. SMITH, a

citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of WVisconsin, have invented a new and useful Improvement in Foundry-Flasks, of which the following is a specification.

My invention relates to improvements in foundry flasks constructed of rolled metal on account of its light weight in proportion to its strength in the plane of the metal, and the objects of my improvement are to provide the necessary stifl'ening against lateral strains transverse to the plane of the metal and against torsional strains tending to twist and distort the flask as a whole, by adding metal only at the proper place and only in the proper relation or disposition thereof to produce the desired ef fect, having due regard to cheapness and practicability of construction. I attain these objects by the features of construction illustrated in the accompanying drawing, in which Figure 1 shows a perspective View of a complete flask comprising both cope and drag. Fig. 2 shows a section through the side of the flask taken on a vertical plane. Fig. 3 shows a section through a flask constructed of plain sheet metal.

The term flask as ordinarily employed in foundry parlance comprises two sections, the upper or cope section and the lower or drag section. In sizes that are not too large to be handled by two men, cross bars in the cope are not necessary and I construct the cope and drag exactly the same and a description of only one section is therefore necessary.

In its preferred form I construct my flask of a single strip of specially rolled metal having the cross section shown in Fig. 2. This strip of rolled metal is cut the required length, bent to the requisite form, the ends forming the joint marked 6, being brought together under one of the pin and guide plate attachments marked 0, the rivets which secure this pin plate to the flask thus serving to secure the ends of the strip together. The metal of this strip is preferably rolled with the cross section shown in Fig. 2 in which the two edge flanges (Z. cl. project inward of the flask for sand lifting purposes and also from the surface by which one section fits against the other,

or rests on the bottom board, or forming board if one is-used. The semicylindrical ribs 6 at the middle of the height of vthe.

strip are for resisting torsion and lateral strain without unduly adding to the Weight of the flask as is now set forth in the prior art. As the dimensions of this special form of flask metal, if correctly designed, will vary with every difference in size of flask and as a special set of rolls is required to produce each size of metal, many tons of metal being required to be rolled whenever a mill is setup with one particular set of rolls, it is easily seen that the practicability of this form of flask is limited by the cost involved.

In order to reduce the cost and thus increase the practicability and extent of use of rolled metal flasks reinforced at the middle of their height against torsion and lateral strain, I have devised a new form of reinforcement consisting of a bar of angle iron. Angles of varying weight and size are a standard article of commerce and may be obtained in any quantity desired. I flange or bend each leg of the angle in a plane perpendicular to the plane bisecting the angle by either rolling or hammering.

The bar is thus given the form shown in Figs. 2 and 8 in cross section. The parts of the legs of the angle which retain their original form are marked f. f. and the rolled flanges are marked 9. Ihese flanges g are securely riveted to the metal of the flask and the angle bar forms, with the flask, a hollow girder of exceedingly grea strength, compared with its weight, for resisting lateral and torsional strains. This reinforcement is bent to the shape of the flask, thus reinforcing the corners, andextends substantially from one pin plate to the other. The handles 70 are riveted over the reinforcement. forcement may be added to a flask formed of the special rolled metal as shown in Fig. 2 when the flask is larger or wider than the rolled section was intended for, or the reinforcement may be formed of a heavier or larger angle bar and be placed. on a flask made of plain sheet metal as shown in Fig. 3.

A flask constructed'ofa cross section as shown in Fig. 3 has the metal excellently well disposed to resist deflection and torsion This angle bar reinin the same Way that a hollow or tubular shaft is far stronger than a solid shaft of the same Weight.

Having noW ascertained the nature, pur pose and advantage of my invention, What I claim is- 1. A foundry flask constructed of rolled metal having a reinforcement extending from each guide pin plate to the other, said reinforcement consisting of a bar of standard mill product angle shape having its hollow side disposed toward the body of the flask and riveted to the flask along both sides of the bar.

2. A foundry flask constructed of rolled flat sheet metal, having a reinforcement extending from each guide pin plate to the other, said reinforcement consisting of a bar of standard mill product angle shape having each leg of the angle flanged in a plane perpendicular to the plane bisecting the angle between the legs, said reinforce ment being riveted to the body of the flask along both flanges.

IRVING E. SMITH.

Witnesses:

J OHANNA SCHMIDT, GRETCHEN VIERHEILIG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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