Disintegrative core for use in die casting of metallic components
AssigneeBrunswick Corporation
InventorsDavid E. Grebe, Mark P. Potratz
Life of this patent
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Abstract
A disintegrative member, such as a salt core, is provided with a vent opening extending through its thickness from an outer surface to an inner surface in order to allow gases to pass radially inwardly through the body of the salt core and away from a region proximate the salt core's outer surface. The escape of these gases through the vent opening decreases the likelihood that porosity will be formed as a result of those gases being trapped in a region proximate the outer surface of the salt core because the molten metal solidifies more slowly in this area because of the thermal insulative qualities of the disintegrative member.
Claims18
A method for producing a cast metallic object having a cavity formed therein, comprising the steps of:
- providing a disintegrative member having an outer surface portion which is shaped to conform with a desired shape of said cavity, said disintegrative member having an internal surface;
- providing a vent opening extending between said outer surface portion and said internal surface;
- providing a die having an extension;
- providing an internal opening within said disintegrative member which is shaped to receive said extension of said die;
- attaching said disintegrative member to said die by inserting said extension of said die into said internal opening within said disintegrative member.
An apparatus for producing a cast metallic object having a cavity formed therein, comprising:
- a disintegrative member having an outer surface portion which is shaped to conform with a desired shape of said cavity, said disintegrative member having an internal surface;
- a vent opening extending between said outer surface portion and said internal surface;
- a die having an extension;
- an internal opening within said disintegrative member which is shaped to receive said extension of said die;
- said disintegrative member being attached to said die at said extension of said die extending into said internal opening within said disintegrative member.
Dependencies are inferred from the claim text.