| 摘要 |
PURPOSE:To lower the rejection rate by molding a hollow part by blowing a pressure fluid in a parison and allowing the pressure fluid to act on the parison at the part molding a profile part in a hollow part cavity from the outside and expanding one wall of the parison toward the other wall thereof to form the profile part. CONSTITUTION:A parison 9 is arranged between first and second split mold 1, 2 and both split molds 1, 2 are closed to perform mold clamping. Subsequently, a blow nozzle 7 is thrust in the parison 9 and a pressure fluid is blown in the parison 9 and blown out of a fluid blowoff port 6. A hollow part is expanded into the shape formed from the inner surface shapes of both hollow part cavities 3,4 by the pressure fluid from the blow nozzle 7. The parison of the part opposed to a profile part cavity 5 receives the pressure fluid from the fluid blowoff port 6 on the rear side thereof and enters the frofile part cavity 5 in a double-ply state to be protruded and molded along the inner surface shape of the cavity 5. At this time, air is sucked from a suction hole 8. |
