GATE DESIGN WITH CONCENTRIC CHANNEL FOR SEPARATING OFF-RATIO MATERIAL

摘要

This invention relates generally to an apparatus for casting a portion of a tire or other article of manufacture, and, more specifically, to an apparatus that has a gate design that has a circular runner and concentric channel or waste reservoir for separating off-ratio material before it enters the cavity that forms a portion of the fire or oilier article of manufacture. The design may further include a passage that connects the runner to the waste reservoir as well as an air vent that allows trapped gas or air to exit the waste reservoir as it fills with waste material, a valve that Is operative!)′ associated with the passage for closing and opening the passage at appropriate times, and a nozzle for initially introducing material into the waste reservoir and subsequently into runner.

主权项

1. An apparatus for molding or casting an article of manufacture having a mold cavity and a feed system for filling the mold cavity with a fluid material, said feed system comprising:
structural members that define a series of voids including a waste reservoir, a runner, a passage that connects the waste reservoir to the runner, allowing fluid communication between the waste reservoir and the runner, an injection point for introducing fluid into the waste reservoir, and a gate that provides fluid communication between the runner and the mold cavity.