Forming a mold for steel casting

摘要

A method of forming a mold for use in the casting of a steel railway freight car truck component is provided. A cope mold is formed by providing a near net shape oversize impression of a cope pattern of a product to be cast in a flask. A cope pattern of the product to be cast is then placed on the flask forming a spacing between the cope pattern and the oversize impression. A resin coated sand is then blown to form a sand layer between the oversized impression in the flask and the cope pattern. The resin sand is set to form a mold of a thickness between the oversized impression in the flask and the cope pattern of the product to be cast. The drag mold is formed in a similar manner.

主权项

1. A method of forming a mold for use in the production of a steel casting,
the steps comprising: providing a drag flask, the drag flask including an oversize impression integral with the drag flask, the oversize impression and drag flask comprising at least one of cast steel and cast iron, providing a drag pattern of a product to be cast, the oversize impression being an impression having a shape related to the drag pattern of the product to be cast, placing the drag pattern of the product to be cast on top of the drag flask to form a spacing between the drag pattern and the oversize impression in the drag flask, injecting a resin coated sand into the spacing between the drag pattern and the oversize impression in the drag flask through a plurality of openings in the drag pattern to form a layer of resin coated sand in the spacing between the drag pattern and the oversize impression in the drag flask, injecting a gas catalyst into the layer of resin coated sand to set the resin coated sand to form a drag mold in the drag flask, providing a cope flask, the cope flask including an oversize impression integral with the cope flask, the oversize impression and cope flask comprising at least one of cast steel and cast iron, providing a cope pattern of a product to be cast, the oversize impression in the cope flask being an impression having a shape related to the cope pattern of the product to be cast, placing the cope pattern of the product to be cast on top of the cope flask to form a spacing between the cope pattern and the oversize impression in the cope flask, injecting a resin coated sand into the spacing between the cope pattern and the oversize impression in the cope flask through a plurality of openings in the cope pattern to form a layer of resin coated sand in the spacing between the cope pattern and the oversize impression in the cope flask, injecting a gas catalyst into the layer of resin coated sand to set the resin coated sand to form a cope mold in the cope flask, placing a plurality of cores in the drag mold, and placing the cope flask with the cope mold on top of the drag flask with the drag mold to form a complete mold ready to receive molten steel to form a steel casting.