Patent ID: 9630244
Date: 2017-04-25
CPC Classifications: B22D

Claim:
1. Device for cooling a vertical semicontinuous casting mould with direct cooling of rolling ingots or extrusion billets, comprising two rows of holes, disposed over the whole of the internal perimeter of the mould cavity, in a lower part thereof where the ingot or billet exits, each of the rows of holes being situated close to a plane perpendicular to the vertical axis of said mould, wherein: a) the two rows of holes are connected to a single cooling-liquid chamber provided in the body of said mould, wherein said single cooling-liquid chamber does not include a valve, b) the first row of said holes, which is highest in the vertical mould, or furthest upstream with regard to dispensing of the liquid onto the ingot surface, is connected to said chamber by channels for dispensing jets of said cooling liquid onto said ingot or billet with an angle of incidence of 32±5 degrees with respect to the vertical axis of the mould, c) the second row of said holes, which is lowest in the vertical mould, or furthest downstream with regard to the dispensing of the liquid, is connected to said chamber by channels for dispensing jets of said cooling liquid over said ingot or billet with an angle of incidence of 22±5 degrees with respect to the vertical axis of the mould, d) the holes in the second row, the lowest or furthest downstream with regard to the dispensing of the liquid, are disposed substantially on a bisection of a gap between two holes in the first row, which is highest and/or the furthest upstream, relative to the vertical axis of the mould, wherein the diameters of the holes are substantially equal, on the same row and between two rows, in order to be able to simultaneously dispense said liquid with flow rates and speeds substantially equal over the two rows of holes, both during a start-up phase and during a permanent casting regime.