Patent ID: 7549459

Claim:
A crystallizer for casting low melting point metals and alloys, comprising: a base ( 1 ), an end mould ( 2 ), mould seats ( 6 , 7 ) on the end mould ( 2 ), and film moulds ( 8 , 9 ), wherein a plurality of position-limiting parts ( 16 ) are arranged in the inner side of said mould seats, a slot ( 17 - 1 ) being formed between adjacent position-limiting parts, the shape of the inner side of the position-limiting parts corresponds with that of an outer periphery of mould walls ( 8 - 1 , 9 - 1 ) of the film moulds ( 8 , 9 ), an inner periphery of the mould walls ( 8 - 1 , 9 - 1 ) corresponds with the outer periphery of a casting, the film moulds ( 8 , 9 ) are fixed on the mould seats so that the slot ( 17 - 1 ) is closed to become a cycle passage of cooling medium through a medium channel ( 17 ); on the upper end of the medium channel ( 17 ) there is a medium-supplying port ( 5 ) and the lower end of the medium channel ( 17 ) is communicated with a drain pipe ( 12 ).