Patent ID: 6607375
Filing Date: 2003-08-19
Classification: B29C,B29K

Abstract:
An injection molding device comprising:an injection mold which includes movable and stationary mold portions for simultaneously injection molding MÃ—N preforms (M&gE;2, N&gE;2) in an upright state; a movable mold clamping plate for supporting said movable mold portion; a stationary mold clamping plate for supporting said stationary mold portion; a clamping plate driving mechanism which has four tie-bars to move said movable mold clamping plate in a vertical direction; and a removing mechanism for removing said MÃ—N preforms; wherein: said stationary mold portion has an injection cavity mold; said movable mold portion has an injection core mold and split neck cavity molds; and said removing mechanism includes: at least one removing plate which moves between said movable and stationary mold clamping plates when opening said injection mold and holds and removes said injection-molded preforms; and a plurality of removing revolving rails for conducting said at least one removing plate at its opposite ends, wherein said plurality of removing rails are fixedly provided between said stationary mold portion and said four tie-bars and extend outside between said stationary mold portion and said four tie-bars, and wherein said removing mechanism includes M rows of said removing plates each for holding N preforms and a pitch changing mechanism which increases a row pitch in said M rows of removing plates when advancing and decreases the row pitch when retreating.