MOLD FOR SQUARE-CYLINDRICAL PLASTIC BOTTLE

摘要

PURPOSE:To manufacture a molded product having extremely few unevenness ascribable to an air bubble and high glossines on the occasion of molding of square-cylindrical plastic bottle by blow molding. CONSTITUTION:Mean roughness on the center line of a cavity 3 forming wall surface forming a mouth part of a bottle and a square-cylindrical bottle main body where shoulder parts are connected at almost right angles with each other on the lower end of the mouth part is established at not exceeding 0.25mum and an air suction hole 8 communicating with an air suction device decompressing a cavity 3 space at the time of mold clamping is opened at a shoulder part forming part.