Method and apparatus for discharging a foamed material mixture, and the thermal insulation material produced thereby

A method for discharging a foamed material, more particularly a heat insulating material, with the aid of a mixing head for mixing at least two reactive constituents in a low pressure process, which mixing head is comprised of a pipe in which an agitator rotates at a high speed of rotation and from which mixing head the mixture ready for reaction in discharged by gravity and distributed onto a substrate in order to fully react and foam up there, characterized in that

• the ready mixture, in addition to being discharged by gravity, is discharged with the aid of centrifugal force, and in that only one (A) of said two reactive constituents, which one constituent (A) is comprised of materials which do not react on their own, is first introduced into a space within said mixing head located in the vicinity of an outer bearing of a floating shaft upon which said agitator is mounted and is then conveyed by the action of centrifugal force to another location within said mixing head at which it only then becomes intermixed with the other (B) of said two reactive constituents in order to prevent premature reactions occurring in the vicinity of said bearing and so that said bearing does not come into contact with the interreacting constituents (A and B) and is thereby protected against contamination, heating or damage by said interreacting constituents.