Patent ID: 8978714
Filing Date: 2015-03-17
Classification: B22D,F16L,Y10T

Abstract:
1. A method for manufacturing a bi-material sleeve, the bi-material sleeve including an annular outer sleeve and an annular inner sleeve bonded to each other, the annular outer sleeve being of a different material than the annular inner sleeve, the method comprising: bottom pouring and solidifying a first sleeve in a casting space delimited by a casting base, a first ingot mold wall positioned on the casting base and by an upwardly moveable wall positioned on the base and concentric with the first ingot mold wall; raising the upwardly moveable wall so as to uncover a skin of the first sleeve which is solidified thereagainst; and bottom pouring and solidifying a second sleeve in a casting space delimited by the skin of the first sleeve which has solidified beforehand against the moveable wall and a second stationary ingot mold wall, the bonding of both the first and second sleeves being effected by diffusion of material between the surfaces of the first and second sleeves which are in contact with each other during solidification or by co-solidification.