초록 ▼

An injection molding apparatus includes an injector portion which includes a plurality of mold cavity modules each having a plurality of cavities cooled by fluid flowing through a plurality of cooling channels which communicates with a common coolant manifold. Each mold cavity module is supplied wit

An injection molding apparatus includes an injector portion which includes a plurality of mold cavity modules each having a plurality of cavities cooled by fluid flowing through a plurality of cooling channels which communicates with a common coolant manifold. Each mold cavity module is supplied with molten plastic material by a separate manifold which consists of an elongated shell having an exterior surface defining at least one inlet sprue communicating with a source of plastic and a plurality of outlet gates each communicating with a cavity of the mold module, a tubular heating element positioned within the shell for heating the interior portion of the shell, and a plurality of runners extending from the inlet sprue to the outlet gates and spiral about the heating rod so that molten plastic material may flow from the inlet sprue through the runners to the outlet gates and receive heat energy from the heating rod.

대표청구항 ▼

For use with an injection molding apparatus of the type having an injector portion including a plurality of mold cavities communicating with a source of molten plastic material, a heated manifold comprising: an elongated shell having an exterior surface defining at least one inlet sprue for communic

For use with an injection molding apparatus of the type having an injector portion including a plurality of mold cavities communicating with a source of molten plastic material, a heated manifold comprising: an elongated shell having an exterior surface defining at least one inlet sprue for communicating with a source of material and a plurality of outlet gates for communicating with mold cavities; said shell having an interior portion defining a central longitudinal passage therethrough; heating means positioned within said passage for radiating heat into said interior portion; and said interior portion having a plurality of discrete spiral runners extending from said inlet sprue to said outlet gates and spiraling about said heating means such that molten plastic material may flow from said inlet sprue through said runners to said outlet gates and receive heat energy from said heating means.