Patent ID: 6106261
Filing Date: 2000-08-22
Classification: B29C

Abstract:
For use with a dual extruder plastic injection molding machine having first and second independent injection systems, a mold for molding a onepiece article in a single molding operation using two different plastic materials so a first portion of said article is made of a first plastic material and a second portion of said article is made of a second plastic material, said mold when in its closed position comprising, in combination:a first mold cavity for molding said first portion;a second mold cavity for molding said second portion;each of said first and second mold cavities having its own separate gate into which plastic is injected;said first and second mold cavities communicating with one another through a common fusion chamber;said fusion chamber having a first entrance from said first cavity which entrance is located so said first plastic material will enter said fusion chamber after said first cavity has been substantially filled;said fusion chamber having a second entrance from said second cavity which entrance is located so said second plastic material will enter said fusion chamber after said second cavity has been substantially filled;a barrier at least at said first or second entrance to said common fusion chamber to control the flow of plastic from the associated first or second cavity to said fusion chamber after the associated first or second cavity has been filled;whereby said first and second plastic materials will enter said common fusion chamber after said first and second cavities have been substantially filled and will fuse said first and second portions together while still hot to create said one-piece article.