| 摘要 |
PURPOSE:To obtain a hollow molded product holding squareness produce no gap or inclination between adjacent panels at the time of connection use by providing the upper and lower side wall members positioned in the axial direction of a parison between a closed position almost right-angled to a bottom surface member and a truncated chevron-shaped open position. CONSTITUTION:The upper and lower side wall members 10a, 10b of a female mold 8b are opened in a truncated chevron shape. Subsequently, a molten parison P is suspended from a die 2 and pinched at the lower part thereof to be continuously suspended to the gap between mutually separated male and female molds 8a, 8b. Low pressure air is blown into the parison from a preblow pin 18 to be preparatorily inflated while the parison is held between the upper and lower side wall members 10a, 10b. At the same time, the upper and lower side wall members of the female mold are closed while the male and female molds are allowed to gradually approach the parison and the parison is allowed to follow the cavity formed by the male and female molds between the fixed side wall members on the lateral side of the parison while the side wall members on the side of the parison are gradually advanced. |
