| 摘要 |
PROBLEM TO BE SOLVED: To cause liquid supplied to a plurality of injection heads to circulate by a rational method.SOLUTION: A liquid storage section 106 storing liquid supplied to a plurality of injection heads 102 is provided and the liquid is sucked out by a circulation pump 104 from inside the plurality of injection heads 102 and discharged to the liquid storage section 106 while being supplied to the plurality of injection heads 102 via a pressure control valve 150. In a configuration as described above, the circulation pump 104 sucks the liquid from individual ones of the injection heads 102. Consequently, passage resistance becomes less, and the liquid can appropriately circulate. Further, the liquid is supplied at an appropriate pressure via the pressure control valve 150 from the liquid storage section 106 to the injection heads 102. On this account, the liquid can be appropriately injected. |
