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.

1 . A tumbling unit such as a casting shake-out unit, rotary media drum, sand reclaimer or the like, the tumbling unit comprising: 
 a cylindrical outer shell;    a cylindrical liner positioned within said outer shell, said liner being formed of a series of interfitting segments;    said segments having an inner surface, an outer surface, mutually parallel side edges, a front edge, a back edge, and two parallel vanes extending from said outer surface; the side edges of the segments having a groove formed therein and extending the length of said side edges, the grooves of neighboring segments defining a channel therebetween; and    an elongate retaining pin received in said channel to urge adjacent segments apart thus forming a tight interfit among the segments in a row of said liner.    
   
   
       2 . The tumbling unit of  claim 1  wherein said liner segments include tongues on said segment front and back edges, and cutouts in corners of said segments; said tongues and cutouts being shaped and positioned to enable said segments to interfit with each other; said pins having cutouts at opposite ends thereof; said pin cutouts conforming generally to the profile of the segment cutouts.  
   
   
       3 . The tumbling unit of  claim 1  wherein said vanes have a constant shape in cross section.  
   
   
       4 . The tumbling unit of  claim 3  wherein said vanes have a rectangular cross section.  
   
   
       5 . A tumbling unit, such as a casting shake-out unit, rotary media drum, sand reclaimer or the like, having a cylindrical outer shell and a cylindrical liner positioned within the outer shell, and the liner being formed of a series of interfitting segments, wherein the improvement comprises: 
 said segments having an inner surface, an opposite outer surface, mutually parallel side edges, a front edge, an opposite back edge, and two parallel vanes extending outward from said outer surface wherein said vanes travel within the gap between the outer shell and the liner;    two grooves, each formed upon one of said side edges extending along the length of said side edge, said grooves of neighboring segments defining a channel therebetween; and    elongate retaining pins received in said channels to urge adjacent segments apart thus tightly interfitting said segments in a row of said liner.    
   
   
       6 . The tumbling unit of  claim 5  further comprising: 
 tongues on each of said front and back edges;    cutouts in the corners of said segments, wherein said tongues and said cutouts being shaped and positioned to interfit said segments adjacent to each other; and,    said pins having cutouts at opposite ends thereof; said pin cutouts conforming generally to the profile of the segment cutouts.    
   
   
       7 . The tumbling unit of  claim 5  wherein said vanes have a constant shape in cross section.  
   
   
       8 . The tumbling unit of  claim 7  wherein said vanes have a rectangular cross section.  
   
   
       9 . The tumbling unit of  claim 5  wherein said segments have a generally rectangular shape.