Edge-gated injection molding apparatus

摘要

An edge-gated injection molding apparatus is disclosed having an injection manifold assembly for distributing a melt stream of moldable material to a plurality of mold cavities aligned on opposing sides of the injection manifold assembly. The injection manifold assembly includes a plurality of melt outlets with each melt outlet being in fluid communication with a respective mold cavity, and a plurality of biasing components disposed along a centerline of the injection manifold assembly. A nozzle seal is disposed between each injection manifold assembly melt outlet and its corresponding mold cavity, with an upstream end of the nozzle seal being slidably disposed against its respective melt outlet. Each biasing component is disposed between a pair of melt outlets and corresponding nozzle seals for biasing the melt outlets and nozzle seals outward from the centerline of the injection manifold assembly toward their respective mold cavities and applying a preload thereto.

主权项

1. An edge-gated injection molding apparatus comprising:
an injection manifold assembly for distributing a melt stream of moldable material to a plurality of mold cavities that are aligned on opposing sides of the injection manifold assembly, the injection manifold assembly having
exterior side surfaces including a plurality of melt outlets with each melt outlet being in fluid communication with a respective mold cavity of the plurality of mold cavities, anda plurality of biasing components secured to the injection manifold assembly and being disposed for biasing the exterior side surfaces having the plurality of melt outlets outward from a centerline of the injection manifold assembly toward their respective mold cavities; and a plurality of nozzle seals for receiving the melt stream from the plurality of melt outlets of the injection manifold assembly and for delivering the melt stream to the plurality of mold cavities, wherein an upstream end of each nozzle seal is in fluid communication with a respective melt outlet and is slidably disposed against a respective exterior side surface of the injection manifold assembly to accommodate thermal expansion of the injection manifold assembly, and wherein each nozzle seal is biased outward from the centerline of the injection manifold assembly by a respective biasing component such that the outward biasing applies a preload to the nozzle seal.