Broadway Companies, Inc.

John W Gaiser

William R Gaiser

Stephen A Bright

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.

Injection molding apparatus

A link for coupling a plurality of injection mold manifolds has expansion and compression compensating slots for absorbing movement of the manifolds as they are heated and cooled.

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Dayton, OH, United States of America

John W Gaiser