FOUR-LEVEL SPRUEBAR-LESS MELT DISTRIBUTION SYSTEM

摘要

A melt distribution system for a four-level stack mould which avoids the use of a central spruebar extending axially along the moulds. The melt distribution system incorporates leg manifolds for registering with an injection machine nozzle to divert melt radially outwardly from the injection machine nozzle. A first conduit extends from the leg manifold parallel to but axially spaced apart from a mould axis to a central distribution block: Melt is bifurcated in the central distribution block to respective crossover conduits extending from opposite sides of the central distribution block. The crossover conduits are generally parallel to but spaced apart from a mould axis. The crossover conduits fluidly communicate with first and second main manifolds in which melt flow is directed to respective injection nozzles.