Method and apparatus for providing air vents or holes in casting moles of molding sand
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United States of America Patent
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-
Apr 1, 1980
Grant Date -
N/A
app pub date -
Jun 15, 1978
filing date -
Jun 15, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for forming at least one air vent or hole in a casting mold made of molding said and having a top flask with at least one blind hole originating at its parting plane with a bottom flask comprises the steps of pressurizing the mold cavity and drilling the air vent or hole into communication with the blind hole while drawing off the materials produced by drilling directly at the drilling point. An apparatus for performing the above-noted method includes, according to a preferred embodiment, a source of compressed gas having a pressure hood mountable over the inlet of the mold, and a drilling tool disposed within a suction hood which is placed in a sealing engagement with the top flask after the drilling tool has been properly aligned with the blind hole that is to form part of the air vent or hole.
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