Casting nozzle
AssigneePegasus Industries, Inc.
InventorKenneth P. Zecman
Life of this patent
Estimating the term…
Abstract
A nozzle for molten metal casting operations wherein is provided with an annular groove either in an exterior surface or, in the case of a nozzle having a hard metal insert, in an interior surface. In either case, the groove is filled with a material having a high heat conductivity and which is either in a location where it can receive heat directly from a localized source such as gas fired torch or in thermal circuit with such a location; i.e. connected to the location by some intermediate leg of high thermal conductivity material. In one specific embodiment the groove is filled with copper and is connected to a series of spiral extension grooves. In another embodiment is formed in an interior surface where it is adjacent a hard metal insert which increases the durability of the nozzle in repetitive make and break operations.
Claims7
A casting nozzle for transferring molten metals into a die comprising:
- a substantially solid nozzle body formed of a structural metal such as steel, having an inlet out and an outlet end and a through-bore between said ends;
- said body having an external surface of area substantially greater than the surface area of said through-bore;
- a relatively shallow groove formed in said exterior surface in a pattern which extends both circumferentially and axially of said body, substantially full between said ends but occupying only a portion of said surface area, thereby to define ungrooved land areas over said external surface;
- and
- a high heat conductivity metal such as copper filling said groove substantially flush with said surface to leave said land areas exposed;
- said high heat conductivity metal serving as a passive heat transfer distribution path for heat applied locally to a portion of said nozzle body.
Dependencies are inferred from the claim text.