Abstract: A spraying head for feeding pressurized air and an atomized liquid substance, for example a releasing agent, for cleaning and treatment of molds in hot molding of ferrous and non-ferrous materials; the spraying head comprises a main body having at least a mixing chamber in which a first conduit for the injection of pressurized air opens on a side opposite to a spraying nozzle; a second conduit for feeding a liquid, opens into the mixing chamber through a Venturi which tapers towards the same mixing chamber, at right angle to the air injection conduit. A normally closed control valve is slidably supported inside a flow regulator having a tapering end portion protruding into the Venturi, to regulate the delivery of the liquid substance into the mixing chamber; the spraying head may be provided with a single or independent spraying nozzles and mixing chambers on opposite sides of the main body.

Abstract: A manipulator with servocontrolled axes, has two or more programmable heads for spraying various liquids and/or air into moulds, more particularly foundry moulds. The manipulator is controlled by a programmable logic (CPU) to move two or more spraying heads in a continuous or discontinuous mode along a predetermined path. The heads are designed to spray, in a programmed manner, various liquids which are atomised either under pressure or by a strong jet of compressed air, thus performing the dual action of atomiser and air blower.

Abstract: An atomizer, particularly suitable for atomizing grease or lubricating compositions and useful in the foundry industry for lubricating molds, comprises a chamber in which is mounted a piston which is displaced from a rest position to an operative position by air under pressure against the effect of a spring operable to urge the piston to the rest position. Air under pressure is admitted to the chamber through an air inlet which is in constant communication with an outlet to the chamber by way of an air passage through the piston. An inlet for the composition to be atomized is controlled by a valve and opens to the chamber at a location at which it is closed when the piston is in the rest position and at which it communicates, in the operative piston position, with the air passage through a further passage provided in the piston so that the composition to be atomized is drawn by a Venturi effect into the air passage and entrained in the air flowing therethrough.