Method of making injection molding cooled thread split inserts
a technology of cooled thread and split inserts, which is applied in the field of making pairs of cooled thread split inserts, can solve the problems of time-consuming and therefore relatively costly problems
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Reference is first made to FIG. 1 which shows a bottle preform 10 and a pair of thread split inserts 12, 14 made according to a preferred embodiment of the invention. As can be seen, the bottle preform 10 is hollow and is elongated to a selected length. The bottle preform 10 has a neck portion 16 with an outer surface 18 forming a ring collar 20 and threads 22 extending between an open end 24 and the ring collar 20. The bottle preform 10 is injection molded of polyethylene terephthalate (PET) according to a conventional injection molding cycle in a conventional mold.
Each thread split insert 12, 14 has a front end 26, a rear end 28 and flat inner aligned faces 30, 32 extending on opposite sides of a curved inner surface 34. During molding of the bottled preforms 10, the thread split inserts 12, 14 are mounted in a mold with the respective flat inner faces 30, 32 of the thread split inserts 12, 14 abutting, whereby as seen in FIG. 13 the curved inner surfaces 34 of the thread split in...
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