The invention relates to a tip plate for a bushing for receiving a high temperature melt, which tip plate comprises several sections of different type, while the invention further includes a corresponding bushing to produce glass fibres.

The invention relates to a tip plate for a bushing for receiving a high temperature melt, which tip plate comprises several sections of different type, while the invention further includes a corresponding bushing to produce glass fibres.

Provided is a composition for a glass fiber which has a high elastic modulus and satisfactory productivity, and can facilitate the production of a fine-count glass fiber. The composition for a glass fiber of the present invention includes, as a glass composition expressed as a mass percent in terms of oxide, 50% to 70% of SiO.sub.2, 15% to 25% of Al.sub.2O.sub.3, 3% to 13% of MgO, 3% to 15% of CaO, and 0.5% to 5% of B.sub.2O.sub.3.

The present invention relates to a bushing for producing glass fibers, including: a base plate; and multiple nozzles from which molten glass is discharged, in which a nozzle group formed with the alignment of the multiple nozzles is joined to the base plate. In the present invention, a coating layer made of ceramics is formed on each of the nozzles forming at least a row of the outermost layer of the nozzle group. The coating layer does not cover the entire nozzle, that is, the nozzle is covered so as to be in a state of no coating layer in the vicinity of the nozzle tip. The present invention is a bushing plate for producing glass fibers, with which the occurrence of irregular phenomena is suppressed and a uniform glass flow can be obtained stably over a long period of time.

A spinner for use in manufacturing glass fibers includes a body having an upper wall with an opening therethrough, a lower wall, and a side wall extending between the upper wall and the lower wall. The side wall comprises a plurality of orifices, and the body comprises a metal alloy material and is formed using a localized welding method, such as a directed energy deposition (DED) method.

A bushing for producing glass fibers, including: a base plate; and multiple nozzles from which molten glass is discharged, in which a nozzle group formed with the alignment of the multiple nozzles is joined to the base plate. A coating layer made of ceramics is formed on each of the nozzles forming at least a row of the outermost layer of the nozzle group, but the coating layer does not cover the entire nozzle, that is, the nozzle is covered so as to be in a state of no coating layer in the vicinity of the nozzle tip.

Provided is a composition for a glass fiber which has a high elastic modulus and satisfactory productivity, and can facilitate the production of a fine-count glass fiber. The composition for a glass fiber of the present invention includes, as a glass composition expressed as a mass percent in terms of oxide, 50% to 70% of SiO.sub.2, 15% to 25% of Al.sub.2O.sub.3, 3% to 13% of MgO, 3% to 15% of CaO, and 0.5% to 5% of B.sub.2O.sub.3.

A sealing arrangement for a drawing furnace including a vertical center hole with surrounding heating elements for receiving a glass preform including a tapered portion connected to an extension rod. A sealing with an opening is arranged on top of the furnace. The arrangement includes an outer annular bushing arranged on top of the furnace and an inner annular bushing with a first and an opposing second vertical end. The inner bushing is positionable to surround at least part of the tapered portion with the first end positioned to the region of the beginning of the tapered portion and the second end includes protrusions on the outer surface. As the inner bushing is inserted in the outer bushing it is arranged to be movable within the outer bushing and the protrusions form supports for holding the second end of the inner bushing above the center hole.

A sealing arrangement for a drawing furnace including a vertical center hole with surrounding heating elements for receiving a glass preform including a tapered portion connected to an extension rod. A sealing with an opening is arranged on top of the furnace. The arrangement includes an outer annular bushing arranged on top of the furnace and an inner annular bushing with a first and an opposing second vertical end. The inner bushing is positionable to surround at least part of the tapered portion with the first end positioned to the region of the beginning of the tapered portion and the second end includes protrusions on the outer surface. As the inner bushing is inserted in the outer bushing it is arranged to be movable within the outer bushing and the protrusions form supports for holding the second end of the inner bushing above the center hole.

A method for producing glass fiber nozzles, comprising the steps of: A) providing or producing a base plate comprising a first material, being chemically resistant to the glass melt and dispersion strengthened, B) printing at least one tube made of a second material being chemically resistant to the glass melt onto one side of the base plate, wherein the at least one tube each comprise at least one feedthrough, C) generating at least one passage in the base plate, the passage is connected to at least one of the at least one feedthrough in such a way that each of the at least one passage through the base plate forms a common line permeable to the glass melt, with at least one of the at least one feedthrough of an associated tube leads through the base plate and through the associated tube.