초록 ▼

Injection molding apparatus and process characterized by feeding a supply of thermoplastic material to a shooting pot from a supply of thermoplastic material by a hot runner system, delivering a first charge of thermoplastic material from the shooting pot to a mold cavity, and delivering a second ch

Injection molding apparatus and process characterized by feeding a supply of thermoplastic material to a shooting pot from a supply of thermoplastic material by a hot runner system, delivering a first charge of thermoplastic material from the shooting pot to a mold cavity, and delivering a second charge of thermoplastic material from the shooting pot to the mold cavity.

대표청구항 ▼

An injection molding apparatus which comprises: at least one mold cavity; a hot runner system for supplying thermoplastic material to said mold cavity; supply means for supplying thermoplastic material to the hot runner system; a shooting pot operative to hold a given amount of thermoplastic materia

An injection molding apparatus which comprises: at least one mold cavity; a hot runner system for supplying thermoplastic material to said mold cavity; supply means for supplying thermoplastic material to the hot runner system; a shooting pot operative to hold a given amount of thermoplastic material communicating with the hot runner system and supplied thereby; a first valve means between the supply means and the shooting pot and a second valve means between the shooting pot and the mold cavity, both of said valve means being operative to permit and block flow of thermoplastic material; a first injection means communicating with said shooting pot for delivering a first charge of thermoplastic material from the shooting pot to the mold cavity; said first injection means including a first stage injection piston situated in a first stage injection cavity; a second injection means communicating with said shooting pot for delivering a second charge of thermoplastic material from the shooting pot to the mold cavity; said second injection means including a second stage injection piston situated in a second stage injection cavity; and including a first stage actuating means of said first stage injection means which contacts and actuates the second stage injection piston for delivery of the first charge of thermoplastic material.