| 摘要 |
PURPOSE: To blow-mold a head rest core body made of a blow-molded article integral with a stay under the condition that the usage amount of a blow- molding synthetic resin is reduced. CONSTITUTION: Parison having a circular cross section is pressed between the top mold U and the bottom mold L of a blow mold into the parison having an elongated elliptical cross section. After a stay 2 is inserted in the resultant parison, blow molding is performed in order to produce a head rest core body. |
