Patent ID: 6099284
Filing Date: 2000-08-08
Classification: B29C

Abstract:
A pressure-activated valve for an injection molding apparatus a comprising:a pin having a cylindrical or prismatic stem section and a flared head section;a valve body having a first end and a second end, said valve body including a passageway communicating with said first and second ends;a port proximate said second end and communicating with said passageway for receiving pressurized fluid;said valve body including a flared seat proximate said first end and communicating with said passageway, said stem section of said pin being positioned in said passageway with said head section positioned near said seat so as to provide a radial clearance of approximately 0.002 inch to 0.006 inch (approximately 0.05 mm to 0.15 mm) between said stem section and said passageway through said valve body; anda compression spring operatively associated with said stem section to bias said head section into seated engagement with said seat.