| 摘要 |
PURPOSE:To uniformize the formation of a hollow biaxially stretched blow- molded container having a large depression, by providing a part having temp. lower than the heating temp. of the inner wall of a blow mold to said inner wall. CONSTITUTION:A wall insert 33 forming a depression to a molded container is engaged with a blow mold and set to temp. 10-30 deg.C lower than the temp. of the wall surface 34 of other mold. This cooling is performed by flowing a cooling stream in the cooling channel 36 provided in the wall insert 33 to lower the heat of the inside surface 39 of the wall insert 33. By this temp. difference, the blow-molded container is not too stretched at the depression forming part thereof and the plastic container having the depression having no difference in a stretching degree is obtained. |
