| 摘要 |
A substantial barrier (14) to the flow of liquid in a circumferentially-extending liquid conduit groove (34) of a mold insert (10) is provided by forming recesses or undercuts (40) by undercutting the sidewalls (36) of the liquid conduit groove (34), inserting a plate-like liquid dam (50) within the liquid conduit groove (34), and clamping the dam (50) in the liquid conduit groove (34) by the use of a pair of locking screws (66) or pins (66A) that extend through bores (64, 64A) in the dam (50) into engagement with inwardly-facing surfaces (42) of the undercuts (40). The relationship between the inwardly-facing undercut surfaces (42) and the locking screws (66) or pins (66A) is preferably such that there is a progressively increasing interfering engagement of the locking screws (66) or pins (66A) with the undercut surfaces (42) resulting in increasing clamping pressures applied to the dam (50) assemblies. |
