Patent ID: 7455446

Claim:
A method for mixing chemically reactive liquid chemical components (A, B) into a mixing device ( 10 ), for production of polyurethane foams and moulded parts, in which metered quantities of a first (A) and at least a second (B) chemically reactive components are fed under pressure conditions into a first chamber ( 15 ) and made to flow into a second chamber ( 24 ) through at least one injection orifice ( 31 ), said method comprising: providing an annularly shaped common pressure and feeding chamber ( 15 ); feeding metered quantities of the chemical components (A, B) into the annularly shaped common pressure and feeding chamber ( 15 ) common to the chemical components (A, B), provided by said first chamber of the mixing device ( 10 ) maintaining the chemical components (A, B) inside the feeding chamber ( 15 ) in an unmixed state and at a same pressure condition, while they are flowing toward the at least one restriction or orifice ( 31 ); co-injecting the unmixed chemical components (A, B) feed in common, into a mixing chamber ( 24 ) provided by said second chamber ( 24 ), through said least one injection orifice ( 31 ); and causing a first mixing of the co-injected chemical components (A,B) by turbulency during co-injection, and a second intimate mixing by impingement and turbulency into the mixing chamber ( 24 ) of the mixing device ( 16 ).