Patent ID: 7264457

Claim:
Equipment used in the molding of plastic pipe, said equipment comprising a plastic supply and plastic feed that provide molten plastic for making the pipe to a flow distributor connected to an upstream end of die tooling, said plastic supply being located remotely of the die tooling, said die tooling having a first internal elongate die passage of a ring shaped cross section to carry the molten plastic to a downstream molding region where the pipe is shaped, the die passage having a ring shaped mouth covered by the flow distributor; the flow distributor having a first plastic flow path having an inlet connected to said plastic feed and at least two channels connected to said inlet with each channel having an outlet port feeding molten plastic to said ring shaped mouth of said first internal die passage with said outlets ports being distributed about said ring shaped mouth; said equipment further including a first adjustment means associated with said at least two channels to manually vary the distribution of molten plastic from the plastic supply through the outlet ports positioned around the ring shaped month of the first internal die passage to produce an even distribution of the molten plastic from the elongate die passage at the downstream molding region; and wherein said first adjustment means being positioned upstream of and spaced from said outlet ports.