| 摘要 |
A manufacturing method of a cylinder block for diesel engine is provided to improve physical property and rigidity of the journal portion of the cylinder block and to prevent defects due to heat concentration by fitting an insert to both sides of the crank journal of a sand mold. A manufacturing method of a cylinder block(14) for diesel engine comprises a step of making a sand mold for cylinder block, a step of fitting an insert to both sides of a journal portion of the sand mold for improvement of physical properties of a crank journal part, a step of setting a plurality of gates(12) for pouring molten metal around the head face of the mold, a step of injecting the molten metal in the mold at low pressure, and a step for rotating 180 degrees the mold to cure the molten metal. The gates are connected through runners(13) and serve as a riser.
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