Porous mold insert and molds
AssigneeGeneral Electric Company
InventorsEdward James Balaschak, Michael Czenszak, Douglas Seredich
Life of this patent
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Abstract
A mold is provided having a porous metal insert through which a mold release agent can be pumped to provide a desired, precisely metered quantity or coating of the release agent at a desired location along the inner surface of a mold cavity, or at the inner surface of an injection port, between or at periodic intervals of successive moldings of parts. The need to manually apply mold release agent between successive moldings, for example to the injection port of an injection mold, is reduced, thereby reducing or substantially eliminating inconsistent applications of release agent that are characteristic of manually applied coatings. A method of molding using the disclosed porous metal insert also is provided.
Claims24
A mold comprising a molding cavity defined within said mold, an injection port having an inner surface defining a passageway through a wall of said mold for injecting a molding compound into said molding cavity, and a porous metal insert provided in said wall of said mold, a portion of said porous metal insert being located at and providing at least a portion of said inner surface of said injection port and another portion of said porous metal insert being located at an outer surface of said mold.
A mold for an end portion of a ceramic arc tube for a discharge lamp, said mold comprising reciprocating first and second mold halves, said mold halves comprising
- respective and opposing first and second facing surfaces that face the opposing mold half in a closed position of said first and second mold halves,
- respective and opposing first and second injection runners provided in the respective first and second facing surfaces and extending in a substantially longitudinal direction from an outer surface of the respective mold half;
- respective and opposing first and second laterally extending runners provided in the respective first and second facing surfaces, each of said first and second injection runners extending to and being in fluid communication with the associated laterally extending runner, each of said laterally extending runners extending laterally in either direction from the associated injection runner toward respective and opposing first and second pairs of laterally disposed and longitudinally extending molding cavity halves;
- wherein, in the closed position of said first and second mold halves, said first and second injection runners cooperate to define an injection port through a wall of said mold, said first and second laterally extending runners cooperate to define a laterally extending channel in fluid communication with said injection port, and said first pair of molding cavity halves cooperate with said second pair of molding cavity halves to define a pair of complete molding cavities located on either said of and in fluid communication with said laterally extending channel;
- and wherein a porous metal insert is provided in a wall of said first mold half, said porous metal insert having an inner surface portion located at said first facing surface, at least a portion of said first runner being provided in said inner surface portion of said porous metal insert, and another portion of said porous metal insert being located at an outer surface of said mold.
Dependencies are inferred from the claim text.