Patent ID: 6361300
Filing Date: 2002-03-26
Classification: B29C,Y10S

Abstract:
An injection molding apparatus comprising:a manifold having an inlet to receive material injected therein; an injection nozzle having a first end coupled to the manifold and a second end to communicate with a gate of a mold; a bore formed through said manifold and said injection nozzle to deliver material injected through said manifold and said injection nozzle to said gate; a valve pin to be axially aligned with the gate and having a surface for forming a gap with a surface of the bore in the manifold, wherein the size of the gap is controllably variable to regulate the rate of material flow through the gate; a sensor to sense a condition related to the rate of material flow through the gate; and a controller to receive information from said sensor, wherein the controller is adapted to control the position of the valve pin, thereby controlling the size of the gap, based on the information received from the sensor.