| 摘要 |
<p>The present invention prevents coolant from leaking out of a valve means (23) after a feed pump (4) stops feeding the coolant, and diminishes a time-lag between the onset of feeding the coolant and mist generation, when the feed pump (4) starts feeding the coolant again. In the machine tool of this invention, the coolant is fed from a feed pump (4) into a mist generating device (13) provided on the tip of a spindle (8) by way of a feed line (7), and a valve means (23) is provided at an inflow part for coolant of the mist generating device (13) to be closed when the coolant pressure within the feed line (7) lowers below a fixed level. A coolant sucking and delivering means (2) sucks a fixed amount of coolant in the feed line (7 ), when the feed pump (4) stops feeding the coolant. On the other hand, the means (2) feeds a fixed amount of coolant into the feed line (7), when the feed pump (4) begins feeding the coolant. <IMAGE></p> |
