| 摘要 |
Liquid sending portions ( 7 a , 7 b) of an intermittent fixed displacement pump ( 6 ) intermittently sucking and discharging a fixed amount of fluid are parallelly arranged, plastic raw material liquid is discharged from the liquid sending portions ( 7 a , 7 b) with the timing of suction and discharge of the liquid sending portions being shifted from each other, plastic raw material liquid discharged from each other, plastic raw material liquid discharged from each of the liquid sending portions ( 7 a , 7 b) is joined, and the plastic raw material liquid joined is poured in a casting/polymerizing die ( 4 ). Plastic raw material liquid can be stably sent even if its viscosity becomes higher, air bubbles are prevented from being produced in raw material pouring, and an excellent production yield is achieved.
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