| 摘要 |
PURPOSE:To shorten a molding cycle time, by a method wherein an advanceable and retreatable molding tool and core mold which is capable of blowing off compressed air from the tip are arranged within a cavity surrounded by a stationary mold and movable mold. CONSTITUTION:When a stationary mold 2 and movable mold 3 are clamped together, a cavity 13 is formed.When a parison molding tool 23 is thrust out into a cavity 13, a parison molding cavity 24 is formed. When molten resin is injected through a nozzle 6 of an injection machine, a parison 25 is formed within the cavity 24. When compressed air is blown in the parison 25 through an air blow-off port 20 while the parison molding tool 23 is being retreated gradually, the parison 25 begins to expand and stuck finally to the insides of a slide mold 11 and the stationary mold 2. After the parison 25 has been cured, mold break of the slide mold 11 is performed simultaneously by retreating the movable mold 3 and a hollow molding is separated from the stationary mold 2 under a state wherein the same is stuck to the movable 3. Then the parison molding tool 23 is thrust out and the hollow molding is taken out from the movable mold 3. |
