Patent ID: 7402267

Claim:
A method of injection molding a plastic product, the method comprising the steps of: (a) injecting fluid plastic material into a mold cavity; (b) conducting said injected plastic material through at least one flow guide in the mold cavity; and (c) adjusting said conduction within the at-least-one flow guide by protracting a movable mold part into said flow guide or by retracting a movable mold part from said flow guide; wherein the at-least-one flow guide includes a first segment and a second segment that is misaligned with the first segment but that overlaps the first segment to enable conduction of fluid plastic material from the first segment to the second segment; wherein the first and second segments are defined by a first mold part on one side of the overlapping segments, a second mold part on the other side of the overlapping segments and a third mold part that is movable with respect to the first and second mold parts; wherein the movable mold part is disposed at said overlap; and wherein step (c) includes while said injected plastic material is being conducted through the at least one flow guide, protracting or retracting the movable mold part in response to variations in injection pressures in different portions of the mold cavity to dynamically adjust said conduction from the first segment to the second segment.