Blow-molded container and mold for use in blow molding

A blow-molded container comprising:

• a cylindrical body;
• a neck disposed in the upper portion of said body;
• and
• a bottom disposed in the lower portion of said body, wherein
• said container is formed by a direct blow molding process using a split mold, which has a mold parting face perpendicular to the mold-clamping direction and splits into front and rear mold halves, and in which a blow ratio in the range of 1 to 3 is set in the direction of mold parting lines formed by said mold parting face in a plan view showing a body portion above said bottom, wherein
• each of said front and rear mold halves include a semi-columnar bottom block, said semi-columnar bottom block being disposed inside each of said respective front and rear mold halves and having a top surface, said top surface forming said bottom, said bottom and said cylindrical body forming a semi-circular bottom edge line, wherein
• a bottom parting line is formed on an underside surface of said bottom by a linear pinch-off line, which is formed by pinch-off blades disposed at pinch-off section of said split mold, a pair of said mold parting lines formed on the right and left sides of a peripheral zone, and a pair of connecting lines that connect the right and left ends of said pinch-off line to inner ends of said right and left mold parting lines, wherein
• said connecting lines adjacent to said pinch-off line are formed by end parting faces located at right and left ends of the pinch-off section of said split mold so that a pair of substantially right-angled bent corners is formed by said connecting lines and said pinch-off line and said pair of connecting lines formed along said semi-circular bottom edge line, wherein
• said split mold forms flash lines on the underside surface of said bottom that extend only from the center of the underside surface to said bent corners, wherein
• the pinch-off line linearly extends across a diameter and passes the center of the underside surface of the bottom, the pinch-off line being angularly offset by an angle α from the direction of the mold parting lines, wherein
• the connecting lines are formed by connecting substantially linearly the right and left ends of said pinch-off line with the inner ends of respective right and left mold parting lines, the connecting lines being substantially perpendicular to the mold parting lines, and wherein
• the bottom parting line is formed substantially axisymmetrically around the center of said underside surface.