| 摘要 |
PROBLEM TO BE SOLVED: To obtain an injection nozzle unit of an injection molding machine capable of performing the molding changeover of two kinds or two or more kinds of resins. SOLUTION: The injection nozzle unit 1 is equipped with resin injection ports 4a and 4b injecting molten resins from the outside and provided at two places or two or more places, resin flow channels 7a and 7b for allowing the molten resins from the resin injection ports 4a and 4b provided at two places or two or more places to meet with each other, a nozzle 5 for injecting the resins in a mold from the flow channels after confluence and at least two resin back flow preventing mechanisms 6 provided between the resin injection ports 4a and 4b provided at two places or two or more places and the confluent point of the flow channels. The resin injection ports 4a and 4b provided at two places or two or more places are constituted as nozzle pressing surfaces 2a and 2b capable of being pressed by the nozzles of independent injection units 3a and 3b.
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