Patent ID: 6790029
Filing Date: 2004-09-14
Classification: B29C,B29K

Abstract:
A molding apparatus for injection molding plastic articles comprising:an outer mold comprised of a plurality of molding blocks which are separable along a parting interface and which, when positioned together, define an enclosed article mold cavity therewithin, a hollow mold core having opposing ends, at least one of which is an open and, and defining a longitudinal axis extending between said opposing ends, and said mold core has an outer surface and defines a core runner cavity therewithin that has a uniform longitudinal cross section throughout relative to said longitudinal axis, and said core runner cavity extends through said open mold core end, and at least one core ejection gate is defined within said core leading from said core runner cavity to said outer surface of said core, and a removable core end closure that is positionable at said open end of said core and which defines a core runner extension cavity therewithin that is in communication with said core runner cavity and is aligned on said longitudinal axis of said core, and said mold core is clamped in a fixed, predetermined position relative to said article mold cavity by said molding blocks of said outer mold, whereby a path of injected molten plastic flow is established into said core runner cavity, through said ejection core gates, and into said article mold cavity from said outside of said mold core when said core is within said outer mold and said molding blocks are positioned together.