Cast iron recuperator
AssigneeThe Air Preheater Company, Inc.
InventorRichard F. Stockman
Life of this patent
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Abstract
A method of casting a hollow bodied plate type recuperative heat exchange envelope. The heat exchange envelope comprises first and second envelope halves cast independently, then bonded together by fusion of molten metal of the second envelope half with solidified metal of the first envelope half. The first envelope half includes a lateral flange on opposite sides thereof that is confronted by the molten metal of the second envelope half to form a flange that connects envelope halves providing an increased area of contact therebetween. The flange of the second envelope half includes multiple surface areas that become fused to opposite sides of the first envelope half to form a strong connection impervious to fluid leakage.
Claims6
The method of making an envelope for a recuperative type heat exchanger comprising the steps of casting a bottom half of an envelope to form a concave wall that has a peripheral surface extending along a pair of opposite sides of said envelope, preparing a convex mold for a top half of said envelope that includes elongate slits on opposite sides thereof adapted to confront the internal surfaces on the top and bottom halves of the envelope, pouring a quantity of molten metal into the mold to form the top half of the envelope that includes a portion that confronts the slits and is contiguous with the peripheral surface on the bottom half of the envelope, and cooling the casting to fuse the molten metal of the top half of the envelope to the peripheral surface of the bottom half of the envelope thereby forming a fluid-tight bond therebetween.
Dependencies are inferred from the claim text.