Abstract: A method of forming fibers from molten mineral material is provided. The method comprising the steps of: rotating a spinner having an orificed peripheral wall, the orificed peripheral wall having a top row of orifices, introducing molten mineral material to the spinner to create a fan of primary glass fibers, creating an annular combustion flow of heated gas and directing the annular combustion flow of heated gas substantially through the primary fibers, creating an annular flow of attenuating air with an annular blower, the annular flow of attenuating air being sufficient to attenuate the primary fibers into secondary fibers, directing the annular combustion flow of heated gas and the annular flow of attenuating air so that they are radially spaced apart at the level of the top row of orifices, and directing the annular combustion flow of heated gas and the annular flow of attenuating air so that they are brought together at a position below the top row of orifices.

Abstract: Device intended for an installation for forming fibrous felts, the fibers being formed from a material that can be attenuated by internal centrifugation and by attenuation by means of a gas stream, the flow of fibers being in the form of a tubular veil, the device including air blowing means that expel air tangentially to the tubular veil so as to impress a rotational movement on the veil, wherein the blowing means deliver air in a direction perpendicular to the main direction of the flow of the tubular veil.

Abstract: It is provided a fibering device for making insulating glass fibers in which the gas fiber coming out of a rotor (3) driven in rotation around its axis is maintained to a viscous state and stretched by means of two blower units capable of directing the respective flows towards the fibers coming out of the rotor (3). The second blower unit (8) consists of a plurality of nozzles (10) for delivery of an air flow, which nozzles can be rotated about a respective axis (B) that is transverse to the rotation axis (A) of the rotor. Through movement of the nozzles (10), the point of incidence of the second flow (9) on the fibers is modified so that the stretching degree of the fibers is consequently varied.

Abstract: A device for internal centrifugation of mineral fibers including a centrifuge equipped with a peripheral band perforated with orifices distributed in a plurality of annular zones arranged on top of each other, assuming that the centrifuge is in centrifugation position. The device also includes at least two annular zones whose number of orifices per unit of surface area differs by a value greater than or equal to 5%, in particular greater than or equal to 10%, and even 20%.

Abstract: An apparatus for positioning a sensor proximate to a fiberizer includes a support means for supporting a sensor, adjustment means for adjusting a position of the sensor, and attachment means for attaching the apparatus to a fiberizer. The adjustment means is coupled to the support means, and the attachment means is connected to the adjustment means.

Abstract: A method of controlling process variables, for a fiberizing assembly including a rotary fiberizing disk in the manufacture of fibers from a high temperature, molten, clear or translucent, thermoplastic, fiberizable material, utilizes an optical sensor assembly. The optical sensor assembly includes a water-cooled optical fiber sensor probe which, in effect, only gathers light emitted from the external sidewall surface of the rotary fiberizing disk. The light is conducted from the probe to an electronic unit that converts the light energy into a temperature value. This temperature value is used to monitor the process and to make any changes in process variables, such as but not limited to heat input to the fiberizing disk, rate of rotation of the fiberizing disk, burner air/fuel ratio, required to produce fibers having desired fiber properties.

Abstract: In an apparatus and method of forming fibers from a fiberizable material, a molten fiberizable material is introduced into a rotating fiberizing rotor and passed through a plurality of holes in an annular peripheral sidewall of the fiberizing rotor to form primary fibers from the fiberizable material. The primary fibers are introduced into hot combustion gases and pressurized air in a fiberization zone adjacent an outer surface of the annular peripheral sidewall of the rotary fiberizing rotor to attenuate and form the primary fibers into fibers of the desired diameter and length. The hot combustion gases are discharged from an annular air cooled burner and the pressurized air, which is discharged from an annular air ring, is the same pressurized air used to cool the annular air cooled burner.

Abstract: A spinner disc for a rotary fiberization process, includes a base plate and an annular peripheral sidewall extending upward from the base plate which has a plurality of rows of fiberizing holes therein for fiberizing molten thermoplastic fiberizable materials by centrifugal force. The base plate has: a central bore therein on a rotational axis of the spinner disc for mounting the spinner disc on a drive shaft; an outer annular portion for receiving molten thermoplastic fiberizable materials to be fiberized; and an inner annular portion intermediate the central bore and, the outer annular base plate portion.

Abstract: Fibers are produced a from molten thermoplastic fiberizable material in a rotary fiberizing process by passing the fiberizable material through rows of fiberizing holes in an annular sidewall of a fiberizing disk. A first manifold supplies a combustible gas or gaseous mixture into the fiberizing disk where the combustible gas or gaseous mixture combusts to help maintain the fiberizing disk and the molten fiberizable material supplied to the fiberizing disk within a desired temperature range for fiberization. A second manifold supplies a combustible gas or gaseous mixture externally of the fiberizing disk where the combustible gas or gaseous mixture combusts. The products of combustion from the burning of the combustible gases or gaseous mixtures discharged from the first and second manifolds heat an annular fiber attenuation zone surrounding the disk sidewall and help attenuate fibers in the heated attenuation zone.

Abstract: A rotary fiberizer includes a spinner for centrifuging fibers from molten material along a path generally coplanar with the spinner, and a pair of opposed annular blowers positioned on opposite sides of the path of the centrifuged fibers, with the blowers having an interior face which is oriented toward the path of the centrifuged fibers, and the blowers having an exterior face which is oriented away from the path of the centrifuged fibers. An induced air conduit associated with each of the blowers is adapted to supply air to the path of centrifuged fibers, and the exterior faces of the blowers contain blower openings to discharge attenuation gasses into the induced air conduits to attenuate the centrifuged fibers.

Abstract: The method for forming fibers by introducing molten material into a spinner having a peripheral wall having a plurality of orifices and centrifuging the molten material through the orifices to create fibers, discharging gases from an opening in a first annular blower, the first blower positioned radially outward from the spinner, and where the gases from the first annular blower converge radially inwardly with respect to the spinner axis to partially attenuate the fibers and influence the flow path of the fibers towards a direction parallel to the spinner axis, and discharging gases from an opening in a second annular blower, the second blower being positioned radially outward from the first blower, and where the gases from the second annular blower converge radially inwardly with respect to the spinner axis to complete the attenuation of the fibers and influence the flow path of the fibers.

Abstract: A glass fiber insulation product comprises irregularly-shaped glass fibers of two different glasses having differing coefficients of thermal expansion, with the irregularly-shaped dual-glass fibers exhibiting a substantially uniform volume filling nature, and providing improved recovery and thermal conductivity abilities even in the absence of a binder material.

Abstract: Mineral material, particularly of the basalt type, is fiberized by internal centrifuging in a spinner having a peripheral wall with a plurality of orifices. A heated gas flow attenuates into fibers the filament cones emanating from the orifices. To produce mineral wool with good fiber fineness and largely free of unfiberized particles, the length of the filament cones and the configuration of the heated gas flows generated around the spinner are adjusted so that the majority of the filament cones emanating from the spinner orifices intersects the isotherm corresponding to a viscosity of 100 poises to enter into a zone cooled down to a temperature corresponding to a viscosity of more than 100 poises. The configuration of the heated gas flow is produced by an annular external burner in conjunction with an annular external blower that produces jets of cool air. The cool air brings low-temperature isotherms in close vicinity to the peripheral wall of the spinner.