Method and device for high-pressure mixing multiple component plastics, especially polyurethane

摘要

The method and device operate with counterflow injection, the components being injected into the mixing chamber by the pressure being converted into velocity. The pressure is preferably set with the aid of a so-called pressure intensifier to over 400 bar, preferably up to 1000 bar. As a result, the mixing intensity is considerably improved in comparison with conventional high-pressure mixing devices, which operate in the range of 250 bar. The device has a pressure intensifier which is formed by a motor-driven hydraulic pump 22, which acts on a second, single-stroke piston pump 18, forming a pressure intensifier, which is designed and dimensioned in such a way that it increases the hydraulic pressure of the first pump to the desired component pressure.