Patent ID: 6358039
Filing Date: 2002-03-19
Classification: B29C

Abstract:
Open injection-molding nozzle (1) comprising a needle (2) having multiple tips (3) on a mold-facing side for injection molding of a shaped piece with several sprue marks, each tip (3) forming an annular slot in cooperation with an entrance opening in a cavity of a mold in an operating position, the needle (2) being displaceable within the open nozzle (1) in a longitudinal direction and being retractable to enlarge the annular slots and openings (4) located in proximity to the needle tips (3), and a drive is provided for reciprocating movement of the needle (2) which acts on an extension (5) of the needle (2) located outside the nozzle (1), the reciprocating movement of the needle (2) being controlled.