Abstract: Mechanically entangled, in-line formed, packs of glass fibers are mechanically entangled differently at different portions of the web. In one exemplary embodiment, in-line formed glass fibers are mechanically entangled by any combination of two or more entangling devices. The two or more entangling devices may be the same or different. In one exemplary embodiment, the glass fibers are mechanically entangled from at least a first side of a web by a first entangling device and are mechanically entangled from a second side of the web by a second entangling device.

Abstract: A device for installation for forming fiber mats, the fibers being formed from a material that can be drawn by internal centrifuging and by drawing by a gas current. The device includes a guide duct into which the fibers are designed to be channelled, with a longitudinal axis including a first portion configured to form the entrance of the duct at which the fibers are designed to be inserted into the duct, a second portion or central portion, and a third portion configured to form an exit of the duct, and an articulation mechanism to act mechanically on the third portion of the duct to cause its dimension and/or the position of at least one of its portions to vary relative to the longitudinal axis.

Abstract: A non-woven product having a core layer (32) containing dense particulate additive between adjacent layers (33) which are substantially free of additive is made by fiberizing a mineral melt on a spinner (1) comprising at least one fiberizing rotor (2, 3, 4) mounted for rotation about a substantially horizontal axis, and the resultant fibres are collected in air streams (5) as a cloud of fibres which travels towards a travelling collector (11) on which a web (14) is formed and carried out of the spinning chamber (9). Dense particles such as magnesium hydroxide are ejected from a suitable ejector (15) on to a baffle (16) by which they are deflected across the width of the chamber and lengthwise over the length of a intermediate collecting zone (B) to form the core layer (32) while the initial and final collecting zone (A and C) are substantially free of the dense particulate additive.

Abstract: A device for installation for forming fiber mats, the fibers being formed from a material that can be drawn by internal centrifuging and by drawing by a gas current. The device includes a guide duct into which the fibers are designed to be channelled, with a longitudinal axis including a first portion configured to form the entrance of the duct at which the fibers are designed to be inserted into the duct, a second portion or central portion, and a third portion configured to form an exit of the duct, and an articulation mechanism to act mechanically on the third portion of the duct to cause its dimension and/or the position of at least one of its portions to vary relative to the longitudinal axis.

Abstract: A spinner for fiberizing glass has fiberizing holes formed in the spinner sidewall by a process utilizing an electron beam perforating process. A backing material used in the process is deposited on the walls of the fiberizing holes for increasing the corrosion resistance of the fiberizing holes. With regard to the formation of each fiberizing hole, an interaction of the backing material with an electron beam during the electron beam perforating process creates a gaseous backing material that expands through a hole created by the electron beam in the spinner sidewall to eject molten alloy material of the spinner sidewall made molten by the electron beam from the hole and deposit a thin substantially uniform coating layer of the backing material on the wall of the hole to increase the corrosion resistance of the fiberizing hole thus formed.

Abstract: Apparatus for making glass fibers has AC induction coils for AC inductive heating of a spinner for spinning molten glass into molten glass fibers, an enclosure that at least partially surrounds the AC induction coils to protect a human worker, and electrically insulating shielding reducing AC power drain by being positioned between the AC induction coils and the enclosure to reduce inductive heating of the enclosure.

Abstract: A fiberizing device includes a housing, a receiving seat mounted on the housing, and a drawing device. The receiving seat includes a receiving groove having a discharge port. The receiving groove receives molten fluid formed by heating waste. A heating device is provided for heating the molten fluid in the receiving seat. The drawing device draws the molten fluid from the discharge port to form a solid fiber after the molten fluid comes in contact with cool air. The solid fiber possesses excellent fire-resistant properties and thus can be used as fire-resistant materials.

Abstract: A duct assembly is employed for directing a central air flow upwardly toward the rotating spinner assembly of a rotary-type fiberizer that produces a downwardly flowing column of fibers. The central air flow eliminates the low-pressure zone that normally occurs beneath the spinner assembly of conventional fiberizers. The cross-sectional profile of a lower portion of the duct is vertically elongated where the duct passes through the fiber column so as to facilitate the flow of the fiber column over the duct. A shielding member can be positioned to deflect the central air flow away from the spinner assembly and against the interior of the fiber column to insulate the spinner assembly from the relative cool air flow. In another embodiment, a conduit extends through the fiberizer spinner assembly and directs a cooling gas beneath the spinner assembly within the interior of the fiber column.

Abstract: An energy-efficient inductive heater operable to heat a rotary glass fiber discharging spinner. The heater includes shielding disposed between the induction coil and the metal guard plates of the heater. The shielding may comprise any electrically insulative or dielectric material that is capable of withstanding the high operating temperatures occurring in a glass making environment.

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: A fiberizer has a spinning head that is partitioned to create separate extrusion zones for fiber formation. Molten feed stock is allocated between the zones to promote a greater formation of fiber of having a narrow spectrum of fiber diameters.

Abstract: A multi-component fiberizing disk for fiberizing a molten fiberizable material in a rotary fiberization process includes: an annular sidewall having fiberizing holes therein through which a molten fiberizable material passes to fiberize the molten fiberizable material; an upper annular flange; and a base having an annular outer peripheral edge. The annular sidewall, the upper annular flange and the base are made from at least two separate components and, preferably, from three separate components. The separate components are secured to together as the fiberizing disk by fasteners, such as bolt and nut fasteners, that permits the separate components of the fiberizing disk to be disassembled after service. The different components can be made of different metal alloys and a distribution manifold can be incorporated into the fiberizing disk for distributing the molten fiberizable material(s) within the fiberizing disk and to make bi-component fibers.

Abstract: The invention relates to the electric melting technique, in which the melting energy is dissipated in the bath of melted glass as a result of the Joule effect by means of electrodes which dip through the surface of the bath. According to the invention, the electrodes dip into a bath of melted glass which has a height h below 800 mm and a surface S such that the ratio h/S is lower than 0.5 m/m.sup.2. According to another aspect, the exchange surface between the electrodes and the bath is above 0.075 m.sup.2 /m.sup.3 of glass.The invention is used in the manufacture of glass-based products, such as insulating materials based on glass fiber.

Abstract: The invention relates to an arrangement for cleaning a wool chamber in the manufacture of mineral wool. In the manufacture of mineral wool a binder is added to the stream of fibers which is deflected towards the wool chamber and the binder deposits itself in fine droplets in the fibers. The binder-laden fibers which touch against the walls and roof of the wool chamber adhere to them because the binder hardens upon contact with the hot surfaces. Gradually a hard deposit of binder and fibers is formed upon the walls. According to the invention cleaning of the walls is substantially simplified by means of making the walls and/or roof of a double walled construction, perforating the inner walls and applying a reduced pressure in the cavity between the walls holding a detachable lining against the inner walls by means of suction.

Abstract: A method of forming a spinner for centrifuging fibers from molten material is disclosed. A dispersion strengthened metal is warm worked at a temperature above the minimum warm working temperature and below the recrystallization temperature of the metal to form a spinner having an annular peripheral wall and a plurality of ribs formed integrally with the peripheral wall and extending radially inwardly therefrom. The spinner is heat treated to recrystallize the metal to a coarse grain structure, and a plurality of fiber-forming orifices are formed in the peripheral wall.

Abstract: Methods, apparatuses, and devices are disclosed for collecting a veil including long fibers with high speed conveyor surfaces to produce a web of loosely related fibers, and further forming a wool pack by distributing the web of fibers with low frequency sound. The methods, apparatuses, and devices are particularly useful in collecting long fibers, and producing wool packs including long glass fibers.

Abstract: A fiber manufacturing apparatus including a spinner, fixed to one end of a rotatable shaft and equipment for supplying at least one molten thermoplastic material to the spinner is provided. The spinner includes a radial wall and an outer peripheral wall. The radial wall extends radially out from the shaft and has an outer periphery. The peripheral wall is disposed around the outer periphery of the radial wall and has a plurality of orifices for centrifuging fibers from at least one molten thermoplastic material. The spinner is operatively adapted to be radially balanced during the centrifuging operation. By being so balanced, the spinner is less likely to exhibit temperature induced deformation that introduces undesirable process variables during the fiber manufacturing process.

Abstract: The invention relates to fiberizing apparatus for forming mineral wool and a process using that apparatus. The apparatus comprises a set (1) of at least three rotors mounted for rotation about respective horizontal axes. Melt is poured onto the top rotor (4) and thrown onto subsequent rotors in turn (5, 6 and 7) with the result that fibres are thrown off. The rotors all rotate to give an acceleration field of at least 50 km/s.sup.2, and are spacially arranged in respect to one another so that a line drawn from the axis of the first rotor (4) to the axis of the second rotor (5) makes an angle (C) of 0-20.degree. below the horizontal.

Abstract: Centrifugal spinning apparatus includes an annular, usually cup-shaped, spinning member which has a smooth interior surface extending towards the spinning end thereof which has spinning points formed thereon and grooves which extend across the end from the interior surface to the points to direct material in liquid form thereto.