Patent ID: 7175789

Claim:
A method of injection molding a plastic product having a base wall and a sidewall, the method comprising the steps of: (a) injecting fluid plastic material into a base-wall section of a mold cavity wherein the base-wall section includes at least one flow guide that is defined by a first mold part, a second mold part, and a third mold part that is movable relative to the first and second mold parts to either decrease or increase the conduction of injected plastic material through said at least one flow guide; (b) conducting said injected plastic material through said at least one flow guide in the base-wall section and thence into a sidewall section of the mold cavity; and (c) while said injected plastic material is being conducted into the sidewall section of the mold cavity, adjusting said conduction within the at-least-one base-wall section flow guide by moving the movable third mold part to decrease and/or increase said conduction of said plastic material within said flow guide; wherein step (c) comprises moving the movable third mold part dynamically in response to sensed variations in injection pressures in different portions of the sidewall section of the mold cavity.