BLOW MOLDED ITEM AND BLOW MOLDER FOR MOLDING IT

摘要

PURPOSE:To increase the strength of an item by a structure wherein a plurality of internal spaces divided by reinforcing ribs are equipped. CONSTITUTION:Molten thermoplastic plastic molding material is extruded from an extruder so as to store respective materials in respective accumulator 14 in order to extrude the materials, the certain fixed amount of each of which is accumulated in each accumulator, through respective dies 11 with respective die driving parts 15, resulting in producing a plurality of tubular parisons 17, which are adjacently joined together. Next, the parisons adjacent to one another are pinched together in a blowing mold 16 so as to blow in and expand the interiors of the respective parisons in order to bring their outsides into close contact with the inner surface of the mold, resulting in realizing the desired shape. At this time, the joined part between the parisons adjacent to each other turns to be a reinforcing rib of the interior of the final forming. Thus, a blow molded item, the strength of which is enhanced and which is rigid, can be obtained.