BLOW MOLDING METHOD AND COMPACT PRODUCTION DEVICE

To provide a method of making transferability of a solid part excellent without using much time and labor and of resultantly preventing occurrence of sinks or the like.SOLUTION: A blow molding method includes steps of from a) to f). In the a), a parison P is injected between molds 30, 40, and in the b), the molds are mold-closed. In the c), air is blown in the parison P to swell the parison P to molding surfaces 33, 41 side of the molds. In the d), among the molding surfaces 33, 41, while pressurizing an action surface 71a that is a part of the molding surface on the first mold side corresponding to the solid part s14 toward the opposite surface 41a that is a part of the molding surface on the second mold side corresponding to the solid part s14 by a pressure mechanism 70, in a state where a hollow part is not present in the inside of the solid part s14, the parison P is brought into close contact with the molding surfaces 33, 41. In the e), while pressurizing the action surface 71a toward the opposite surface 41a by the pressure mechanism 70, the parison P is solidified. In the f), the mold is opened and the compact is taken out.SELECTED DRAWING: Figure 2 【課題】多大な時間や手間を掛けることなく、中実部の転写性を良好にし、ひいてはヒケ等の発生を防止する。【解決手段】ブロー成形方法は、ａ）〜ｆ）の工程を含む。ａ）ではパリソンＰを金型３０，４０の間に射出し、ｂ）では金型を型締めする。ｃ）では、パリソンＰ内に気体を吹き込んでパリソンＰを金型の成形面３３，４１側へ膨出させる。ｄ）では、成形面３３，４１のうち、中実部ｓ１４に対応する第１金型側の成形面の一部である作用面７１ａを、加圧機構７０により、中実部ｓ１４に対応する第２金型側の成形面の一部である対向面４１ａへ向けて加圧しながら、中実部ｓ１４の内部に中空部分がない状態で、パリソンＰを成形面３３，４１に密着させる。ｅ）では、加圧機構７０により作用面７１ａを対向面４１ａへ向けて加圧しながら、パリソンＰを固化する。ｆ）では、金型を型開きして前記成形品を取り出す。【選択図】図２