| 摘要 |
PROBLEM TO BE SOLVED: To manufacture a mold for blow molding having a technical subject for suppressing the occurrence of burr from the left and right ends of the pinch-off part to a lateral direction in a bottom surface in direct blow, and providing a blow-molded container having excellent appearance which has no burr mark, gloss irregularity and color irregularity on the side surface near the bottom part of the container and is low in blow ratio. SOLUTION: A split mold divided front and rear has a main body parting surface vertical to a mold clamping direction and a pinch-off part where a bite-off blade for the pinch-off of a parison is arranged to the bottom surface of the bottom part of a mold cavity. In the planar cross section in the mold closing state of the split mold, one bottom part parting line is formed from the straight line-like pinch-off line formed to the bottom surface by the bite-off blade, a pair of main body parting lines formed to left and right peripheral edge parts by a main body parting surface and a pair of connection lines for connecting the left and right ends of the pinch-off line and the left and right ends of the main body parting lines. The connection lines form a step-like bent part almost right-angled to the pinch-off line by the end part parting surfaces positioned at the left and right ends of the pinch-off part. COPYRIGHT: (C)2004,JPO |
