Dedicated Solutions Mixing Heads

Although this solution is currently available on the market, competitive mix heads are limited to four streams, their dimension and weight require heavy-duty pour robots while providing speed and pour pattern limitations during operation and they have complex pressure set-up and regulation procedures. 

The innovative aspect of this mixhead is that TDI - and eventually a TDI-compatible sixth component - are fed axially into the mixing chamber through the small piston that cleans the mixing chamber. The other four components, polyols, other catalysts, additives, flame retardants, are fed radially into the mixing chamber. A seal on the small piston provides a permanent separation between the polyol and TDI feeding areas so that any crossover of the low-viscosity components is avoided. 

Defining Formulation 1 as being composed of polyol 1 and isocyanate and Formulation 2 as polyol 2 and isocyanate, an example of a working sequence is as follows  

Pour Formulation 1 polyol 1 and isocyanate recycle through the mixing chamber s piston grooves and are poured in the open mould 

Formulation 2 remains dormant since polyol 2 continues to recirculate through a high-pressure nozzle positioned close to the mixhead 

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