Lead pouring system
AssigneeGlobe-Union Inc.
InventorsRobert W. Mayer, James B. Nowakowski, Bruce A. Pusey, Kashyap H. Shah
Life of this patent
Estimating the term…
Abstract
A pouring system uses low pressure air to force molten lead into mold cavities. The pour spout is heated by the lead bath, and, preferably, a small gap is maintained between the pouring spout and a weir on the mold cavity to prevent stringers from being attached to the cast piece. At the completion of the lead pouring operation, excess metal is drained back through the spout and into the lead bath. Lead volume is controlled by adjusting pressure and timer settings, and a fill hole allows the pump to refill.
Claims22
A system for pouring a liquid into a receptacle comprising a receptacle, a bath of the liquid, a low pressure air source, a pump housing having a chamber for containing the liquid, the housing being at least partially immersed in the bath and having a refilling hole communicating with the bath, a discharge passageway communicating with the chamber and terminating in a pouring spout, a conduit for coupling the air source to the chamber, valve and timer means for admitting a predetermined amount of said low pressure air from the source through the conduit and into the chamber force a predetermined quantity of the liquid through the passageway and out of the spout, said receptacle being adjacent to but spaced apart form the spout, the system further comprising spacer means on the housing for maintaining a predetermined spacing between the spout and the receptacle and means for urging the spacer means on the pump housing against the receptacle so that the spacing therebetween is maintained at the predetermined spacing.
A system for pouring a heated liquid from a bath thereof into a receptacle comprising a low pressure air source, a pump housing having a chamber for containing the liquid, a discharge passageway communicating with the chamber and terminating in a pouring spout, a conduit for coupling the air source to the chamber, valve and timer means for admitting a predetermined amount of low pressure air from the source, through said conduit, and into the chamber to force a predetermined quantity of the liquid through the passageway and out of the spout, and thermal conductive metal rods being embedded in the housing in the vicinity of both the passageway and the bath for heating the passageway.
A system for pouring a liquid into a mold comprising a mold, a liquid bath a low pressure air source, a pump housing having a chamber for containing the liquid, a discharge passageway communicating with the chamber and terminating in a pouring spout, a conduit for coupling the air source to the chamber, valve and timer means for admitting a predetermined amount of said low pressure air from the source through the conduit and into the chamber to force a predetermined quantity of the liquid through the passageway and out of the spout, the housing being at least partially immersed in the bath and a hole being provided therein for refilling the chamber from the bath, the hole passing through the pump housing and communicating with the passageway, and wherein the chamber is a generally cylindrical, vertically oriented chamber, the passageway is an inclined tubular passageway intersecting the chamber at a lower portion thereof and the conduit admits the low pressure air at an upper portion of the chamber, a clean-out hole being provided above the passageway in the housing, said refilling and clean-out holes being axially aligned.
Dependencies are inferred from the claim text.