| 摘要 |
<p>Provided is a blow molding method of a flat container with a suspension part, wherein the method enables to manufacture a one-piece flat container which has a suspension part and is uniform in wall thickness by using a pre-molded blank of a general shape. Before the arrangement of a general pre-molded blank (11) in the shape of a test tube at left and right parting molds (31, 32) in the mold-opening state for blow molding and after the mold closing, parting molds (33, 34) for forming the suspension part descend so as to clamp the bottom (14) of the pre-molded blank (11) from two sides to lift the blank up, so that the pre-molded blank (11) is stretched. After the stretching, the closing of the parting molds (31, 32) for blow molding is performed, while low temperature blow-molding air is introduced to the pre-molded blank (11) for free blow molding. The pre-molded blank (11) already free blow molded is pressed to form a flat shape by using the parting molds (31, 32) for blow molding, and after the mold closing, high temperature blow-molding air is introduced to a flat container already formed. Meanwhile, the parting molds (33, 34) for forming the suspension part are finally closed for stamping the suspension part (4) to form the bottom of the flat container.</p> |
