A mass of graphite is placed into a case, and the case is put into a furnace
(step
S301). The space in the furnace is heated to produce a porous sintered body
of graphite (step S302). Thereafter, the case with the porous sintered body
contained therein is removed from the furnace, and put into a cavity in a press
(step S303). Then, a molten mass of a metal is poured into the case (step
S304), and a punch is inserted into the cavity to press the molten metal
into the porous sintered body in the case (step S305).
