Liner for a casting shake out and reclaimer

Abstract

A tumbling unit such as a casting shake-out unit, rotary media drum, sand reclaimer or the like includes a cylindrical outer shell and a cylindrical inner liner. The inner liner is formed of a series of interfitting segments. The segments each have an inner surface, an outer surface, side edges, a front edge, a back edge, and two vanes extending from the outer surface. The side edges of the segments have a groove and the grooves of neighboring segments define a channel between the segments. A pin in the channel urges the neighboring segments apart to form a tight interfit among the segments in a row of the liner. The pin conforms in shape and size to the cross section of the vanes, and aligns with the vanes of the adjacent segments to form a continuous spiral upon the outside of the liner.

Description

CROSS-REFERENCE TO RELATED PATENTS [0001] The subject matter of this application is related to the subject matter of the patents of Michael S. Didion and Charles J. Didion, pertaining to Interlocking Liner for a Casting Shake Out Unit, now U.S. Pat. No. 6,273,176, and Interlocking Liner for a Casting Shake Out Unit, now U.S. Pat. No. 5,638,890, and both owned by a common assignee.BACKGROUND OF THE INVENTION [0002] This invention relates to casting shake-out units used to separate or remove sand from castings in a foundry, a mill, or other works, and in particular, to a liner which forms the inner surface of the shake-out unit. [0003] In the formation of a tumbling mill, such as a casting shake-out unit, rotary separator, media drum, material drier, lump crusher reclaimer, blending drum, sand screen, or the like, it is desirable to form the inner surface of the mill from segments. Thus, when individual segments wear out, they can be replaced easily and rapidly without incurring a sig...

AI Technical Summary

Benefits of technology

[0014] It is a further object of the present invention to prevent the accumulation of sand at the meeting of two vanes and hence a chokepoint impeding the flow of sand, media, or debris out of a drum.

[0015] It is a further object of the present invention to prevent rocking of a liner due to uneven wear of the vanes.

[0016] It is a further object of the present invention to prevent premature wear of a drum due to rocking of the segments.

[0017] It is a further object of the present invention to increase the sand handled per hour of operation of the drum by twelve per cent (12%) over existing machinery.

[0018] It is a further object of the present invention to reduce the weight of a segment by fifteen per cent (15%) over existing segments to ease operation of the drum and handling of the segments during installation, repair, and replacement.

Problems solved by technology

A chokepoint full of sand, media, or debris slows rotation of the drum, wears the drum, and delays or impedes the flow of other sand, media, or debris.

Sand, media, or debris act as an abrasive and in normal drum operations, the vanes wear.

A segment that rocks causes premature wear to the drum and stresses the tongue and pocket connection of adjacent segments.

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