| abstract |
1. Stirrer (1) for stirring molten glass (16), the stirrer (1) comprising - a shaft (2) having a tip (4) and having a central longitudinal axis (L), and - one or more blades internal stirrers (5, 6) that are attached to the shaft (2), and - one or more external stirrer blades (7, 8) that are attached to the shaft (2), whereby the internal stirrer blades (5, 6) are joined closer to the shaft (2) than the external stirrer blades (7, 8), so that, when the stirrer is considered in a cylindrical coordinate system (11) with the longitudinal axial coordinate (z) of the coordinate system cylindrical (11) defined to coincide with the central longitudinal axis (L), whereby the cylindrical coordinate system (11) is further defined by a radial coordinate (ρ) and an angular coordinate (φ), both the one or more Internal stirring blades (5, 6), as well as the one or more external stirring blades (7, 8) are arranged at an angle (α, β) with respect to the central longitudinal axis ( L), so that said angle (α, β) is between 0 ° and 90 °, not including these values, and they are arranged having at least one blade section with a normal vector (N, P, Q, R), in the side facing the tip (4), with an angular component (NA, PA, QA, RA). |