METHOD FOR MANUFACTURING A DEVICE FOR PRODUCING GLASS OR BASALT FIBRE Russian patent published in 2023 - IPC C03B37/95 

FIELD: metallurgical industry.

SUBSTANCE: invention can be used to produce glass or basalt fibre. Device for manufacturing fibre in form of a drawing die of a melting device contains a container equipped with a bottom. A layer of shellac based protective coating with a thickness of at least 10 mcm is applied to the inner surface of the drawing die and the die area. On the outer surface of the bottom, a metal layer of a material with low adhesion to oxide melts with gold content of at least 99.9%, or a layer of binary platinum-gold alloy with a gold content of at least 0.1%, or a layer of platinum-rhodium-gold alloy with gold and rhodium content of at least 0.1% is applied, and the thickness of the metal layer on the outer surface of the bottom is not less than 0.1 mcm. The protective coating is removed, high-temperature sintering of the coating is carried out at temperatures of 500-1850°C and the coated drawing die bottom is transported to the product assembly operation.

EFFECT: reduction of leakage of the outer surface of the drawing die / drawing die area of the melting device with melts of glass or basalt, as well as a decrease in capillary breakage and an increase in fibre production.

1 cl, 2 ex