US5841A - Improved molder s flask - Google Patents

Description

` UNITED STATES PATENT OFFICE.

LAURESTONR. LIVINGSTON, JOHN J. ROGGEN, AND CALVIN ADAMS, OF

PITTSBURG, PENNSYLVANIA. v n

iMPRovEDMoLoERs FLASK.

To all whom, it may concern.-

Be it known that we, LAUREsToN R. LIV- INGSTON, JOHN J. ROGGEN, and CALvIN ADAMs, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and Improved Molders Flask; and we do hereby declare the following to be Ya full,clear, and exact description thereof, reference being had tothe accompanying drawings, making a part of this specification, in which Figure l represents in perspective the upper and lower parts of our iiask united with a mold formed therein. Fig. 2 represents the parts thereof separated containing their respective portions of the mold, and Fig. 3 the form of the mold after. the flask has been with-` drawn therefrom.

Similar letters indicate like parts in all the figures.

rIhe nature of our invention consists in giving the sides ot' the flask an inward inclination from the bottom of itslower portion, A, commonly called the drag, to the top of its upper portion, B, commonly called the cope,7 for the purposeof enabling the mold'er to withdraw the flask from the mold formed therein, and using the same flask for forming any number of molds.

We generally cast the respective parts of our improved ask of iron. e e are the guiding-pins rising from each end of the drag A. d d are ears cast with or boltedfto each end of the cope B, having apertures formed therein into which the guiding-pins e e accurately Jit when the cope is placed upon the drag, therebyV retaining the two parts of the ilask together in the usual manner. c c are ears cast upon or ,secured to the sides and ends of the cope in the position shown in Fig. 1. kk are pins projecting downward from the under sides of the ears c c. b b are sliding plates secured to the under sides of the ears c c by means of slots in the plates, the edges of which iit into notches in the sides of the pins 7c 7c, on which the plates slide freely out and in. Recesses are cast or formed in the lower edge of the ends and sides of the cope, through which the sliding plates b b can be forced into the mold.

The process of molding in our improved lask is substantially the same as is pursued in molding with the ordinary forms of flasks.

Previous to packing the sand in the cope of our improved iiask the sliding plates b b are forced inward into the positions represented in Fig. 2, which serve to retain the sand therein while the cope is lifted from the drag to withdraw the patterns and finish the mold.

After finishing the faces of the respective porv tions of the mold the cope is placed upon the drag and the sliding plates b b are Withdrawn into the positions represented in Fig. 1. Both portions of the `flask are then withdrawn from the mold, leaving it of the form represented by Fig. 3, and are again used for forming other molds.

Our improved tlasksmay be made of a rectangular, curved, or any other form that may be desired, the gist of our invention consisting in giving the sidesof both portions (the cope and drag) of our improved ask an i'nward inclination from bottom to top, making the top of each portion smaller than its base,

so that they can be raised from the mold f formed therein., without injuring the same, g

and also the combining with the upper portion or cope of the flask a suitable number of sliding plates or their equivalents for retaining the sand therein when the cope is removed from the drag, for the purpose herein de scribed.

We shall sometimes combine sliding plates with the drag of our improved flask should it be found necessary.

Having thus fully described our improved molders ask, what we claim therein as` new, and desire to secure by Letters Patent,

The inclining of the sides of the upper and lower portions thereofr (commonly called the cope77 and drag7) inward from bottom to top, in combination with the sliding plates b'b,

or their equivalents, connected therewith, substantially in the manner and for the purpose

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