| 摘要 |
PROBLEM TO BE SOLVED: To provide a stack injection molding apparatus having a plurality of valve gates commonly operable by means of a uniform velocity transmission mechanism. SOLUTION: A stack injection molding apparatus is equipped with a first valve gate injection nozzle row, a second valve gate injection nozzle row and separate mechanisms each independently operating a nozzle of each nozzle row. Separately mounted reciprocatable yoke plates are engaged with the valve pin of each nozzle row and further the yoke plates are operated by an actuator located in the center or a pair of symmetrically located actuators.
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