| 摘要 |
PURPOSE:To contrive an improvement in casting efficiency of a cylindrical measuring pump, by increasing pressure at the initial stage of pressure feed by making an auxiliary pump act at the starting time of the pressure feed of a measuring pump. CONSTITUTION:At the time of pressure feed of each of raw material components to a mixing head 50 by respective cylindrical measuring pumps 20, 70, auxiliary pump circuits 40, 90 perform the pressure feed of each of the raw material components to each of component circuits 30, 80 from respective auxiliary pump circuits 40, 90 also by making auxiliary pumps 41, 91 of the respective auxiliary pump circuits 40, 90 act at about the same time as starting of pressure feed of the measuring pumps 20. 70. With this construction, the titled method functions so as to increase initial pressure at component circuits 30, 80. |
