摘要:
An acoustical panel comprising a continuous phase of an interlocking set gypsum matrix and a method of preparing an acoustical panel are disclosed.
摘要:
A slurry spray machine for spraying a settable slurry includes a main passageway configured for receiving a supply of pressurized slurry and having a supply end and an outlet end opposite the supply end. A first compressed gas inlet is disposed intermediate the supply and outlet ends and in fluid communication with the passageway for introducing a first supply of pressurized gas into the slurry, and a second pressurized gas inlet is disposed closer to the outlet end than the first inlet and in fluid communication with the passageway for introducing a second supply of pressurized gas into the slurry. A pressurized supply of adjuvant is provided in fluid communication with the second pressurized gas inlet for providing a blended gas to the second gas inlet. At least one valve is provided for controlling the flow of slurry through the passageway and the flow of the first and second gases into the passageway. Prior to the pressurized ejection of the slurry from the outlet end, the first gas is injected into the slurry, and the blended gas is mixed with the slurry and the first pressurized gas between the first gas inlet and the outlet end.
摘要:
An apparatus for the production and collation of mineral fibers, comprising an air fiberization apparatus for generating mineral fibers, a collection chamber for collecting the fibers produced, and a cyclone type air exhaust apparatus connected by a duct to an upper portion of the collection chamber, the exhaust apparatus reducing the air pressure generated within the collection chamber thereby increasing the efficiency of fiber collection, and means for returning mineral fibers escaping from the collection chamber through the cyclone exhaust apparatus to the main fiber discharge position.