A system for spraying a coolant mist onto a part being machined, and including a container for holding a quantity of coolant liquid and having a distribution head to which the coolant liquid and compressed air or other gas to be used as a propellant are delivered separately, and from which the liquid and gas flow into a plurality of discharge hoses having separate nozzles for spraying the coolant onto a plurality of different work pieces. The distribution head preferably includes a centerpost into which the coolant and propellant gas flow, and a manifold body extending about the centerpost and having a plurality of outlets communicating with the different discharge hoses at different circularly spaced locations.
The present invention prevents coolant from leaking out of a valve (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 (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 (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 device (2) feeds a fixed amount of coolant into the feed line (7), when the feed pump (4) begins feeding the coolant.
Crimping of cables of synthetic fiber is performed by an arrangement in which a cable is supplied by rotatable compression rolls with a high speed into a compression chamber, and a cooling air is supplied into the compression chamber, wherein water is added to the cooling air in form of fine droplets.
An apparatus is provided for delivering a combination of gas and liquid. A container provides a liquid admitting cap, a gas admitting port, and a liquid discharging port. A combining assembly has a first chamber in fluid communication with the liquid discharging port, and a second chamber is in fluid communication with the gas admitting port. Both chambers are interconnected through a combining valve. Flexible tubes are included for interconnecting the gas admitting port with the second chamber, and for interconnecting the liquid discharging port with the first chamber, so that the combining assembly may be positioned remotely from the container. A gas pressure controller is interconnected with the gas admitting port for selecting a pressure level of the gas. In operation, the liquid is forced out of the container and into the first chamber by the gas. The relative volume of the liquid flowing into the first chamber to the volume of the gas flowing into the second chamber is determined by the combining valve. The liquid flows from the first chamber to be combined with the gas in the second chamber, thereby forming a two-phase flow of liquid and gas. The combination leaves the second chamber through an outlet nozzle as a stream of liquid entrained within a stream of gas. The ratio of liquid to gas in the combination is determined by the combining valve, and the total pressure of the combination is determined by the gas pressure controller, the initial pressure of the gas, and the diameter of the nozzle.
