Patent ID: 7717699
Filing Date: 2010-05-18
Classification: B29C

Abstract:
1. In combination with an injection-molding mold formed with a rearwardly open cup-shaped recess having an apex at which opens a gate orifice connected to a mold cavity, a nozzle comprising: a nozzle body centered on an axis aligned with the orifice and formed with an axially extending central passage adapted to receive a hot melt, the body having a forwardly projecting tip spacedly received in the recess and itself formed with at least one radially throughgoing branch passage extending radially from the central passage and opening radially outwardly directly into the recess at a location spaced as far as possible from the gate orifice, whereby the melt can flow from the central passage through the branch passage to the recess and thence through the gate orifice into the mold cavity, the tip also being formed with a throughgoing bore axially aligned with the gate orifice; a nozzle pin axially shiftable in the body between an extended position projecting from the bore and fitting into and blocking the gate orifice and a retracted position unblocking the orifice; and actuator means for shifting the pin between its positions.