Un aparato mezclador y un método de mezcla

Un aparato de mezclado de suspensión espesa de estuco 100 que incluye una entrada 130 para la introducción de espuma en una cámara de mezclado 110, en donde la entrada 130 incluye una abertura de entrada 132 en una pared de la cámara de mezclado 110 y un conducto de entrada 134 que se extiende desde esta de manera que un ángulo relativo entre un eje longitudinal 136 del conducto de entrada 134 y una tangente 140 a una ruta de mezclado 124 definida por un miembro de mezclado 120 sea inferior a 90 grados. Lightweight construction panels, such as plasterboard, (e.g. gypsum plasterboard) are commonly used to provide internal partitions in buildings. Sheets of plasterboard are typically carried and positioned by hand. Accordingly, it is desirable to reduce the weight of plasterboard. It is known to include an aqueous foam in the stucco slurry used to produce plasterboards. However, prior known mixers have been found to destroy foam bubbles. The present invention provides a mixing apparatus 100 including an inlet 130 for the introduction of foam into a mixing chamber 110, wherein the inlet 130 includes an inlet aperture 132 in a wall of the mixing chamber 110 and an inlet conduit 134 extending therefrom such that a relative angle between a longitudinal axis 136 of the inlet conduit 134 and a tangent 140 to a mixing path 124 defined by a mixing member 120 is less than 90 degrees.