Apparatus for plastic injection overmolding

An injection molding apparatus for electrical plugs comprising

• at least two molding dies defining therebetween a parting line, a molding cavity for the injection of molten plastic, and an entry port for said molten plastic along said parting line,
• at least two flat rigid positioning blades extending into said cavity from a first one of said molding dies for positioning an electrical conductor within the interior of said cavity, said electrical conductor being surrounded by deformable electrical insulation having a substantially circular cross-section and being secured therein at least while said molten plastic is injected into said cavity,
• said positioning blades having at least one thin edge thereof facing the interior of said cavity contoured in a concave circular arc exceeding 180 degrees to capture said electrical insulation to releasably hold said electrical conductor in a fixed position within the interior of said cavity during said injection of said molten plastic by capturing said deformable insulation within said circular arc until the molded electrical plug is removed from said cavity,
• at least one rigid electric prong having a first stabilizing portion thereof to be encapsulated in the interior of said cavity and connected to said electrical conductor, and a second portion extending out of said cavity through a slot formed in said first one of said molding dies, and
• means associated with said at least one rigid electric prong for holding said electrical conductor in position in the interior of said cavity with respect to said stabilizing portion.