Method for casting low speed diesel engine cylinder cap for large cylinder diameter boat

The invention discloses a method for casting a low speed diesel engine cylinder cap for a large cylinder diameter boat, which comprises the following steps: (1) compiling casting processes: designing a joint surface and a cast system according to a progressive solidification principle; (2) making a wood mold; (3) moulding; (4) melting the poured melt; (5) pouring a casting; (6) insulating and cooling; (7) dismantling mold and cleaning; (8) tempering. The cylinder cap obtained by the casting method does not have casting defects, thereby achieving the technology requirement for casting the cylinder cap. The invention method can substantially reduce the production cost and shorten the production period, and guarantee the stable casting production of the low speed diesel engine cylinder cap for the large cylinder diameter boat in the precondition that formaldehyde and other harmful gases do not generated for polluting environments.