Abstract: Disclosed herein is a head for mixing and ejecting interacting liquid components, in particular for molding articles made of plastic material. The head comprises: a mixing chamber that communicates with a discharge duct, and a first and at least a second duct for infeeding the individual components, the orifices of which open into the mixing chamber; the latter being placed laterally with respect to the discharge duct and its axis forming an angle with the axis of the discharge duct.

Abstract: An apparatus for mixing and ejecting at least two interacting components to provide a foaming material. The apparatus comprises an injection head connected to supply circuits of the individual components, which head includes a mixing and ejecting chamber; the chamber has a cleaning plunger axially reciprocable therein and operated by a double acting cylinder connectable through a first sliding valve to a first pressure fluid supply conduit comprising a one-way valve, and respectively to a branched-off conduit connected to a pressure multiplier cylinder. The control side of multiplier cylinder is in turn connected to the pressure fluid supply through a second sliding valve operatively connected to the first sliding valve.

Abstract: An apparatus for mixing and ejecting fluid materials interacting with one another; said apparatus comprises at least a head having a mixing chamber with an outlet opening for the mixture at one end thereof, and having inlet ports, each of which connected to a supply line for a component. Each inlet port is connectable, through a distributing valve, with an orifice opening into the mixing chamber and respectively with an outlet port connected to a return line for a recycle at a first pressure rate of each component to a reservoir. A pin is reciprocable by a first double-acting cylinder to and away from the outlet opening of the mixing chamber; the distributing valves are operated by a second double-acting cylinder parallel connected to said first cylinder, one side of said second cylinder being directly connected to a pressure fluid source, and the other side being connected to pressure source by means of a shut off valve operable by the piston of the first cylinder at the end of its backward stroke.