| 摘要 |
PROBLEM TO BE SOLVED: To enable continuous molding by a plurality of independent stretch blowing devices by alternately performing the plasticization of a material resin in a plurality of injection devices by employing a common plasticizing device. SOLUTION: First and second injection devices 2, 3 arranged to independent stretch-blowing devices 4, 5 are parallelly provided on both sides of a plasticizing apparatus 1 and the plasticizing apparatus 1 and both injection devices 2, 3 are allowed to communicate with each other by communication passages 8 equipped with changeover valves at the nozzle parts of the cylinder tips of them. A plasticized resin is alternately and continuously supplied to both injection devices 2, 3 from the plasticizing apparatus 1 by changing over the communication passages 8 to continuously perform the injection molding of a preform and the stretch/blow molding of a hollow molded product at every stretch-blowing devices. |
