Patent ID: 8048364
Filing Date: 2011-11-01
Classification: B21B,B22D

Abstract:
1. An apparatus for manufacturing aluminum alloy strip for lithographic printing plate supports from an aluminum melt including a titanium and boron-containing aluminum alloy, the apparatus, comprising: filtering means for filtering, a launder connected to the filtering means, a liquid level controlling means for controlling a liquid level, connected to the launder, the liquid level controlling means includes, at one or more place therein, means for trapping settled particles present in the aluminum melt, and a melt feed nozzle connected to the liquid level controlling means, wherein an opening on an outlet side of the liquid level controlling means which communicates with the melt feed nozzle is provided at elevated position with respect to a bottom surface of the liquid level controlling means in such a way that there exists a step between the opening and the bottom surface, the dam step functioning as the means for trapping settled particles within the aluminum melt, and wherein the launder has a length L (m) which satisfies the following condition: where V is the flow velocity in meters per second of the aluminum melt in the launder and D is the depth in meters of the aluminum melt in the launder.