Side flow diverter for parison extruding head

Claim 1

A parison extruder head assembly connectable to an extruder adapted to form hollow articles from thermoplastic resins by blow-molding the same, said head assembly comprising a head member having a longitudinal opening therein terminating at one end in a discharge port, a mandrel and die pin mounted coaxially within said opening in spaced relation to the sidewalls thereof to form an annular passage, said head having an inlet opening extending into said passage transversely to the axis thereof and adapted to communicate with a source of molten resin, and a flow diverter sleeve surrounding said mandrel and die pin within said passage and the surface of one end of said sleeve defining the opposite end of said passage; said surface being substantially coincident at one side with said inlet opening and sloping therefrom toward said discharge port at the diametrically opposite side of said surface and said sloping surface being at least partially concave in transverse cross-section to augment the sloping effect of saiD surface and thereby cause substantially unimpeded directional transition in the flow of resin from said inlet opening to and through said annular passage.