초록 ▼

A porous paste, especially a plaster paste or slurry for producing sandwich-type plasterboard, is made in a disk-shaped mixer having a rotor rotatable in a mixing chamber by introducing compressed air or other pressurizable gas through a wall or bottom segment directly into the chamber so that the i

A porous paste, especially a plaster paste or slurry for producing sandwich-type plasterboard, is made in a disk-shaped mixer having a rotor rotatable in a mixing chamber by introducing compressed air or other pressurizable gas through a wall or bottom segment directly into the chamber so that the incoming pressurized gas meets the mixture with a shearing action along the wall or bottom.

대표청구항 ▼

1. A method of preparing a porous paste which comprises the steps of:(a) introducing a paste-forming binder and mixing water forming a settable composition with said binder into a mixing chamber; (b) mixing said binder and water to form a settable composition by displacing at least one mixing member

1. A method of preparing a porous paste which comprises the steps of:(a) introducing a paste-forming binder and mixing water forming a settable composition with said binder into a mixing chamber; (b) mixing said binder and water to form a settable composition by displacing at least one mixing member in said chamber relative to chamber walls defining said mixing chamber; and (c) during displacement of said at least one mixing member introducing a pore-forming gas into said composition at a supply pressure above a pressure in said chamber through at least one fine-porous element forming at least a segment of at least one of said walls, thereby forming said porous paste, said mixing member being a disk rotatable about a vertical axis and provided with a peripheral array of teeth.