Head for material mixing and flow - with valves opening to different extents for different flow ratios and designed to allow for materials mass ratio being different from 1

摘要

The invention improves the mixing head, described in the parent patent. That head incorporates distribution valves through which the materials to be mixed flow under press. These valves are connected to devices which allow them to open and close synchronously. If the mass ratio of the materials is different from 1, the rate at which the valves open must differ, because they must open and close at the same time, but to different extents. This is achieved by fitting the swinging lever which actuates each valve with an adjustable stop acting against a counter-shaft bearing against the corresp. controlling finger.