Owens-corning Fiberglas Corporation

Owens Corning Fiberglas Technology, Inc.

Robert L Houston

James E Loftus

Carl R Strauss

A method for making dual-glass fibers includes supplying first and second molten glass to a rotating spinner having an orificed peripheral wall, where the first glass has a higher viscosity than that of the second glass, centrifuging the first and second glasses through the orifices as molten dual-glass streams, maintaining the dual-glass streams at a temperature sufficient to enable the second glass to flow around the first glass, and cooling the dual-glass streams to make dual-glass fibers.

Method for making dual-glass fibers by causing one glass to flow around

A method and apparatus for centrifuging fibers from molten material comprises a spinner having a peripheral wall comprised of an inner layer and an outer layer, a plurality of orifices extending through the inner layer for the passage of molten material therethrough, and a plurality of cavities extending through the outer layer, the cavities generally corresponding to the orifices, the cavities having being sufficiently large so that a) fiber forming cones form where the orifices join the cavities and b) the fibers formed from the cones can exit the cavities without contacting the sides of the cavities.

Centrifuging with protected fiberforming cones

A method and apparatus for fiberizing molten mineral material of the type in which molten mineral material is supplied to a spinner and centrifuged by the spinner into mineral fibers, is characterized by fiberizing the molten mineral material at a temperature below the liquidus temperature of the molten mineral material.

Method for forming mineral fibers

A method and apparatus for forming fibers from molten mineral material comprising a rotatably mounted spinner (10) having an orificed peripheral wall (16) through which the material flows to form primary fibers (20), and a turbulent flow generator (26) adapted to discharge a flow of gases to further attenuate the primary fibers (20) into a veil of secondary fibers (24). The turbulent flow generator (26) generates gaseous flows exerting attenuation forces in different directions at different loci (38, 40, 42, 44) along the path of the fiber being further attenuated.

Method and apparatus for forming mineral fibers

A mathematical model for estimating the mass flow rate of a fluid stream free falling from an overhead orifice by measuring the stream's diameter is presented. The model is particularly applicable for determining the mass flow rate of a free falling stream of molten glass typically supplying a glass wool centrifuge commonly used in the manufacture of glass fiber insulation. A method for automatic control of the molten glass flow to a typical glass forming operation based upon the model is also presented.

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Newark, OH, United States of America

Robert L Houston