Method for casting objects with an improved riser arrangement
AssigneeAMSTED Industries Incorporated
InventorsMark S. Shirley, Michael A. Bland, Joseph A. Cuske
Life of this patent
Estimating the term…
Abstract
A method of casting an object, usually a railroad wheel, is provided. A graphite mold having a drag section and a cope section requires a plurality of riser openings in the cope section to ensure proper dimensional accuracy of the cast railroad wheel by allowing molten metal to continue to feed downwardly through the riser openings to the cast wheel cavity during initial cooling. The riser openings are lined with an improved insulating material in an accurate manner such that the insulating material is added between a machined riser opening in the graphite cope mold section and a mandrel inserted in the riser opening.
Claims25
A method of casting a railroad wheel comprising the steps of:
- providing a graphite mold having a drag section and a cope section,
- providing a plurality of riser openings in the cope section, each riser having an inner surface,
- inserting a mandrel into the riser opening, the mandrel having an outer surface,
- injecting an insulating material between the outer surface of the mandrel and the inner surface of the riser opening,
- injecting a curing agent to contact the insulating material and cure the insulating material to form a layer of cured insulating material on the inner surface of the riser opening,
- assembling the cope section and drag section to form a completed graphite mold,
- and pouring molten steel into the completed graphite mold to cast a railroad wheel.
A method of lining a riser opening in a graphite mold comprising the steps of:
- inserting a mandrel into the riser opening, the mandrel having an outer surface, and the riser having an inner surface,
- injecting an insulating material between the outer surface of the mandrel and the inner surface of the riser opening,
- injecting a curing agent to contact the insulating material and cure the insulating material to form a layer of cured insulating material on the inner surface of the riser.
A method of lining riser openings in a graphite mold comprising the steps of:
- providing a graphite mold cope section having a plurality of riser openings, each of the riser openings having an inner surface,
- inverting the cope section such that a top of each riser opening faces downwardly, and that a bottom of each riser opening faces upwardly,
- inserting a mandrel into the upwardly facing bottom of each riser opening, the mandrel having an outer surface and each riser opening having an inner surface and sealing the downwardly facing top of each riser opening,
- placing a vented plate assembly adjacent the upwardly facing bottom of each riser opening in the cope section,
- injecting an insulating material through the vented plate assembly between the outer surface of the mandrel and the inner surface of each riser opening,
- and injecting a curing agent to contact the insulating material to form a layer of cured insulating material on the inner surface of each riser opening.
A method of casting a railroad wheel comprising the steps of
- providing a graphite mold having a drag section and a cope section,
- providing a plurality of riser openings in the cope section, each riser having an inner surface,
- inverting the cope section such that a top of each riser opening faces downwardly and a bottom of each riser opening faces upwardly,
- inserting a mandrel into the upwardly facing bottom of the riser opening, the mandrel having an outer surface, the mandrel sealing the upwardly facing bottom of the riser opening,
- injecting an insulating material downwardly between the outer surface of the mandrel and the inner surface of the riser opening,
- injecting a curing agent to contact the insulating material and cure the insulating material to form a layer of cured insulating material on the inner surfaces of the riser opening,
- assembling the cope section and drag section to form a completed graphite mold,
- and pouring molten steel into the completed graphite mold to cast a railroad wheel.
A method of casting an object comprising the steps of:
- providing a graphite mold having a drag section and a cope section,
- providing a plurality of riser openings in the cope section, each riser having an inner surface,
- inserting a mandrel into the riser opening, the mandrel having an outer surface,
- injecting an insulating material between the outer surface of the mandrel and the inner surface of the riser opening,
- injecting a curing agent to contact the insulating material and cure the insulating material to form a layer of cured insulating material on the inner surface of the riser opening,
- assembling the cope section and drag section to form a completed graphite mold,
- and pouring molten steel into the completed graphite mold to cast a railroad wheel.
A method of lining a riser opening in a graphite mold comprising the steps of:
- inserting a mandrel into the riser opening, the mandrel having an outer surface, and the riser having an inner surface,
- injecting insulating material between the outer surface of the mandrel and the inner surface of the riser opening.
A method of lining riser openings in a graphite mold comprising the steps of:
- providing a graphite mold cope section having a plurality of riser openings, each of the riser openings having an inner surface,
- inserting a mandrel into the upwardly facing bottom of each riser opening, the mandrel having an outer surface and each riser opening having an inner surface and sealing the downwardly facing top of each riser opening,
- placing a vented plate assembly adjacent the upwardly facing bottom of each riser opening in the cope section,
- injecting an insulating material through the vented plate assembly between the outer surface of the mandrel and the inner surface of each riser opening.
Dependencies are inferred from the claim text.