System of injection blow molding and injection molding device

A mold device for injection molding M×N cylindrical bottom-closed preforms each having a neck, comprising:

• (a) an injection molding station comprising:
• (i) a stationary mold clamping plate;
• (ii) a movable mold clamping plate;
• (iii) an injection cavity mold mounted on said stationary mold clamping plate and comprising M×N cavity molds, wherein M≧2 and N≧2;
• (iv) an injection core mold which is clamped with said injection cavity mold when said movable mold clamping plate is driven and comprising M×N core molds;
• (v) an injection core mold fixing plate mounted on said movable mold clamping plate for fixing said injection core mold;
• (vi) an injection core mold holding plate mounted on said movable mold clamping plate between said injection core mold fixing plate and said movable mold clamping plate;
• (vii) split neck cavity molds which are clamped with said injection core mold;
• (viii) a neck mold fixing plate including split palates each of which holds a respective one of said split neck cavity molds;
• (ix) a stripper plate disposed between said neck mold fixing plate and said injection core mold fixing plate for moving relative to said injection core mold fixing plate, and
• (x) neck mold fixing plate guide rails for holding said neck mold fixing plate, said neck mold fixing plate being slidably movable relative to said stripper plate for guiding said neck mold fixing plate in the direction in which said split neck cavity molds are opened;
• wherein said stripper plate comprises:
• a connecting portion to a moving rod for moving said stripper plate;
• and
• an engaging portion being engaged with a release rod which moves said stripper plate downward to release said preforms from said injection core mold;
• and
• each of said injection core mold holding plate and injection core mold fixing plates has a bore through which said release rod extends, and the device further comprises:
• a removing mechanism for receiving the preforms released when the stripper plate moves downward and which includes M rows of removing plates each for holding N preforms, and a pitch changing mechanism which increases a row pitch in the M rows of removing plates when advancing and decreases the row pitch when retracting.

An injection molding device comprising:

• an injection mold which includes movable and stationary mold portions for simultaneously injection molding M×N performs in an upright state where M is greater than or equal to 2 and N is greater than or equal to 2 (M≧2, N≧2);
• 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 for moving said movable mold clamping plate in a vertical direction;
• and
• a removing mechanism for removing said M×N performs;
• wherein:
• said stationary mold portion has in injection cavity mold;
• said movable mold portion has a injection core mold and split neck cavity molds;
• and
• said removing mechanism includes:
• at least one removing plate for moving between said movable and stationary mold clamping plates when said injection mold is open and for holding and removing said injection-molded preforms;
• and
• a plurality of removing rails for conducting said at least one removing plate at its opposite ends, and
• wherein said four tie-bars have a narrow tie-bar distance in a first direction and a wide tie-bar distance in a direction perpendicular to said first direction, and
• wherein said plurality of removing rails extend along said first direction, 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.