Abstract: The specification discloses a method and apparatus for combining high speed horizontal and high speed vertical continuous mixing of sand and binder ingredients for mold making purposes. Sand supplied by a hopper assembly and liquid binder ingredients supplied by injection assemblies are fed into the rearward ends of a pair of side-by-side, horizontally extending cylindrical mixing chambers. They are rapidly mixed and conveyed forwardly by blade assemblies which extend centrally through the horizontal mixing chambers and are rotated at from about 300 rpm to about 1500 rpm. The mixtures are then discharged into a vertically extending cylindrical mixing chamber where they are rapidly mixed by a blade assembly which extends centrally through the vertical mixing chamber and is rotated at from about 300 rpm to about 800 rpm. The final mixture is then discharged from the vertical mixing chamber downwardly into a mold box.

Abstract: A novel mixing apparatus for pulverent material, slurries and paste like material is disclosed. The apparatus is especially suitable for mixing cement and sand into mortar. The mixing apparatus comprises a casing having a cylindrical inner surface and a screw member mounted within the casing for rotation relative thereto about an axis which is coaxial with the axis of the inner surface, characterized in that the screw member includes a plurality of flights which at least approximate portions of a helical screw but which are arranged such that the tailing portion of one flight overlaps, as viewed axially, the leading portion of the next succeeding downstream flight. The overlapping flights promote turbulence in the flow which ensures good mixing.

Abstract: A method and apparatus for providing an insulating material, for example for a building, in which a premix of water and cement is provided, an air foam is formed by introducing air under pressure into a mixture and a foaming agent, and this air foam is introduced into the premix which is then stirred together with the foam, and the resulting mixture is pumped to the site to be insulated.

Abstract: A method for making a slurry containing particulate matter and fibers for a preformed insulation product comprises mixing dry particulate matter with a binder which is a liquid containing dispersed fibers. An apparatus suitable for practicing the method comprises a means for disposing the particulate matter in the form of a falling curtain and a means for spraying the binder on the particulate matter.

Abstract: Method and apparatus for mixing particulate materials, such as sand, gravel, and cement to form a concrete mix, and for mixing water with the concrete mix to form concrete, and for applying the concrete to a structure such as a pipe, wherein a controlled amount of aggregate is placed on a moving belt and leveled to further control its amount, and then a controlled amount of cement is placed upon the leveled aggregate and leveled to further control its amount, and then the materials on the belt are mixed by spiked rollers dipping into the mixture, water being added to form the concrete, and the concrete being impelled against the object by being passed between high speed rollers.