Patent ID: 7674997
Filing Date: 2010-03-09
Classification: C03B

Abstract:
1. A method of forming fiberizing holes for fiberizing glass in an annular peripheral sidewall of a spinner wherein the sidewall extends upward from an outer edge portion of a disc shaped base of the spinner and wherein, in service, the spinner is rotated at high rotational speeds in a high temperature environment to extrude glass through the fiberizing holes and fiberize the glass, comprising: providing a spinner with a disc shaped base and an annular peripheral sidewall of an alloy material; providing a backing material for use as a backing layer for an electron beam perforating process and for increasing the corrosion resistance of fiberizing holes to be formed in the spinner sidewall by an electron beam perforating process by being deposited on walls of the fiberizing holes formed by the process; the backing material having a coefficient of thermal expansion substantially the same as that of the alloy material of the spinner sidewall; and forming a plurality of fiberizing holes in the spinner sidewall by means of an electron beam perforating process that utilizes the backing material on a side of the spinner sidewall opposite that from which electron beams are directed onto the spinner sidewall wherein, for each of the plurality of fiberizing holes: an interaction of the backing material with the electron beam during the electron beam perforating process creates a gaseous backing material, and the backing material is positioned relative to the spinner sidewall so that a sufficient volume of gaseous backing material produced by the interaction of the backing material with the electron beam 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 a substantially cylindrical shaped wall of the hole.