Patent ID: 10435321

Abstract:
The present invention provides a stirrer for manufacturing glass including a stirrer shaft and a multi-staged rod-shaped stirrer blade fixed so as to penetrate through the stirrer shaft. This stirrer blade is a hollow cylindrical body including: a cylinder obtained by seam welding of two opposing sides of a flat plate made, for example, from strengthened platinum containing platinum or a platinum alloy as a matrix and metallic oxide dispersed in the plate; and a disk welded to an entire circumference of both ends of the cylinder and made from an identical material, and it penetrates so that a weld line crosses a center axis of the stirrer shaft, and is fixed so that a locus of an end portion of the blade forms a spiral shape. In addition, the rod-shaped stirrer blade has a core layer showing a dispersed structure that exists in a cross-sectional structure at a fixing portion with the stirrer shaft and does not receive heat effect resulting from fixing. The present invention is effective in stirring of molten glass having high viscosity, and has enhanced stirring operation and improved durability against deformation and damage.