Oxide remover

Details Oxide remover Oxide remover

B - Operations, Transporting

22

D

B22D 17/00 (2006.01) B22D 17/10 (2006.01)

Patent

CA 2164785

Process for manufacturing shaped parts out of thixotropic metal billets in horizontal pressure diecasting machines such that inclusions of oxide skin surrounding the thixotropic metal billet are avoided in the alloy structure of the shaped part. Before introducing the thixtropic metal alloy into the space inside the mould, the oxide skin surrounding the metal billet is removed completely and collected in a container such that removal of oxide-free, homogeneous thixotropic metal alloy is minimised by taking into account the thermal and mechanical properties of the thixotropic billet, which are asymmetric with respect to the longitudinal axis of the metal billet. The removal of the oxide skin takes place in a horizontal diecasting machine which contains an oxide remover (30) between the casting chamber (10) and the mould (70). The oxide remover (30) is represented by a ring-shaped body with a horizontal concentric middle axis (m) and a throughput opening. The oxide remover (30) contains a ring-shaped recess, the oxide deposit ring (40) which is connected to the throughput opening (31) of the oxide remover (30) via a concentric, ring-shaped oxide remover opening (42), the cross-section of the oxide remover opening (42) being asymmetric with respect to the concentric middle axis (m) of the oxide remover (30).

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