PIN DRIVING MECHANISM FOR VALVE GATE APPARATUS IN MOLD FOR INJECTION MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a pin driving mechanism for a valve gate apparatus in a mold for injection molding wherein a movable pin can be smoothly and rapidly actuated and a gate can be surely opened and closed by means of the movable pin and a molded article with good quality can be easily molded and a feeding system for a hydraulic fluid can be simplified and structure of a mold is simplified. SOLUTION: By communicating fluid feed openings 48 and 49 and 50 and 51 for feeding each hydraulic fluid into a plurality of hydraulic fluid filling spaces 34 and 35 with communicating paths 52 and 53 provided in the outer cylindrical body part 31, fluid paths 57 and 58 for the hydraulic fluid between an exterior hydraulic fluid feeding means and the outer cylindrical body part 31 are simplified and structure of a mold is simplified.