Apparatus, Method and Core for Molding a Ceramic Discharge Vessel and Removing the Core
AssigneeOsram Sylvania Inc.
InventorsJeffrey Neil, Joseph Lima, Victor Perez
Life of this patent
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Abstract
A method of molding a ceramic vessel includes compressing a water-soluble powder, suspending the compressed powder shape in a mold, injecting a ceramic molding mixture into the mold, and dissolving the compressed powder by flushing the vessel with water. A core for making an arc discharge vessel that has a discharge chamber and two capillaries includes a molded core of the water-soluble powder having a shape of the discharge chamber, and preferably two capillary-forming pins extending from the molded core. An apparatus for removing the molded core that includes a water reservoir that preferably flushes water through the vessel and dissolves molded core.
Claims23
A method of molding a ceramic vessel, comprising the steps of:
- (a) compressing a water-soluble powder into a shape of a chamber of the vessel;
- (b) suspending the compressed powder shape in an exterior mold;
- (c) injecting a ceramic molding mixture into the exterior mold to mold the vessel;
- and
- (d) dissolving the compressed powder shape by flushing the molded vessel with water.
A method of molding a ceramic arc discharge vessel, comprising the steps of:
- (a) forming a molded core for the vessel by compressing a water-soluble powder into a shape of an arc discharge chamber of the vessel;
- (b) suspending the molded core and two capillary-forming pins in an exterior mold;
- (c) forming the chamber and two capillaries by injecting a ceramic molding mixture into the exterior mold;
- (d) withdrawing the pins from the capillaries;
- and
- (e) dissolving the molded core by flushing the molded vessel with water.
A core for molding a ceramic discharge vessel having a discharge chamber, the core comprising:
- a molded core of a compressed, water-soluble powder, said molded core having a shape of the discharge chamber.
An apparatus for removing a water-soluble core having a hole therethrough from a molded ceramic discharge vessel having two capillaries, the apparatus comprising:
- a water reservoir having an opening in a lower portion, the opening adapted to receive a first one of the capillaries, and a water level in the reservoir sufficient to submerge a second one of the capillaries and cause water to flow through the hole and dissolve the water-soluble core.
Dependencies are inferred from the claim text.