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US 4,556,097 AGranted
Mold plug and method for sealing an ingot mold
AssigneeGraphite Sales, Inc.
InventorKevin L. Burmeister
Life of this patent
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AssigneeGraphite Sales, Inc.
InventorKevin L. Burmeister
Estimating the term…
A plug for closing the opening in the bottom of a top pouring ingot mold is comprised of a preformed plug body having top and bottom ends and an outer peripheral surface providing a contour generally corresponding with that of the mold opening to be plugged. The lower portion of the outer peripheral surface is provided with a coating of a thermally curable sealing composition having a heavy paste-like consistency, and the plug body and coating are enclosed in a heat shrinkable plastic film. In use, the plug is pushed into a plug opening in the bottom of an ingot mold which generally is hot from a previous casting operation, the plastic film disintegrates, the sealing material is squeezed so as to spread and fill the space between the mold opening and plug body, and the heat of the mold cures the sealing material to secure the plug in place and seal the peripheral space between the plug body and mold opening.
A method of making a plug for closing the bottom opening in a top pouring ingot mold comprising, providing a preformed mold plug member having top and bottom ends and an outer peripheral surface between said ends and received in said openings, coating at least a portion of said peripheral surface with a heat curable sealing composition, and completely covering said coating with a film of heat degradable plastic material.
A plug for sealing the bottom opening in a top pouring mold comprising, a plug body having top and bottom ends and an outer peripheral surface between said ends and received in said opening, a coating of heat curable sealing material on said peripheral surface and covering at least a portion of said surface between said ends, and heat degradable plastic film means on said body completely covering said coating.
A method of plugging the bottom opening in a top pouring ingot mold using a preformed mold plug member seatable in the opening, said opening and plug member having opposed peripheral surfaces when said plug member is seated in said opening, said method comprising, coating at least a portion of the peripheral surface of said plug member with a heat curable sealing composition in a flowable state, pressing said coated plug member in the bottom opening for the flowable composition to conform to the contours of said opposed peripheral surfaces, and heating said coating to cure said composition and secure said plug member in said opening, said sealing composition being comprised, by weight, of about 50% of an aggregate material and about 50% of thermosetting resinous binder.
Dependencies are inferred from the claim text.