Edge-gated injection molding apparatus

摘要

An edge-gated injection molding apparatus is disclosed for distributing a melt stream to a plurality of mold cavities aligned on opposing sides of an injection manifold assembly. The injection manifold assembly includes melt outlets aligned on opposing sides thereof with a nozzle seal in fluid communication with each melt outlet for transferring the melt stream to a corresponding mold cavity. A sliding relationship between each nozzle seal and its respective melt outlet while the nozzle seal is securely held relative to the mold gate permits misalignment between the nozzle seal and its respective melt outlet in the cold condition without causing stress on the nozzle seal. Under operating conditions, the sliding relationship permits subsequent alignment between the nozzle seal and its respective melt outlet. The nozzle seal has a two-piece gate seal with components thereof threadably coupled to each other such that relative rotation therebetween applies a sealing preload.

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 of a mold that are aligned on opposing sides of the injection manifold assembly, the injection manifold assembly having
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 nozzle seals for receiving the melt stream from the plurality of melt outlets of the injection manifold assembly and delivering the melt stream to the plurality of mold cavities, wherein each nozzle seal includes a nozzle tip coaxially received within a gate seal and wherein the gate seal includes an inner sealing component threadably coupled within an outer sealing component such that relative rotation therebetween applies a sealing preload between the nozzle seal and a first surface proximate to a respective melt outlet and a second surface surrounding a respective mold gate of a corresponding mold cavity.