| 摘要 |
PURPOSE:To mold a flat container with a slight thickness deviation, by deforming an ellipsoidal secondary intermediate molded article, which is obtained from a circular article formed from a closed-end parison, into a flat container. CONSTITUTION:The closed-end parison 5 of circular cross-section is formed by injecting a resin into the cavity between the mold 1 and the injection mold 4 of the turning mold 2. The parison 5 is then inserted into the first blow mold 3a heated at a suitable temperature by turning the mold 2 to form the intermediate molded article 7 of circular cross-section, which is taken out of the mold 3a with the screw part of the article 7 held by the mouth mold, and inserted into the second blow mold 3b narrower than the mold 3a. After mold closing, the article 7 is deformed into the second ellipsoidal intermediate molded article 7', which is expanded by compressed air blown from the male mold 4 aganist the inner surface of the mold 3b to form the desired flat container 9. |
