| 摘要 |
PURPOSE:To easily shape scavenge air passage having runway of scavenge air flow at inside by inserting part of die for die casting providing a cylinder part and the scavenge air passage part in an inner part of cylinder liner at the time of producing a two cycle engine by the die casting method and pouring molten metal by combining the other side for die casting. CONSTITUTION:At the time of casting for shaping 'Schnurle' scavenge air type crank room compressing two cycle engine by the die for die casting, beforehand the part 21, which is a part of the scavenge air passage 22, is joined at the outside of the cylinder liner 20 and the cylinder part A in the die for die casting 19 composing of the cylinder part A in the inner part of this cylinder liner 20 and the scavenge air passage part B shaped in parallel with this, is inserted, and a part 21 of scavenge air passage 22 coincides with the B part. Next, the dies 17, 18, 19 for die casting are fitted around the cylinder liner 20 and after pouring and solidifying the molten metal in the space 16 surrounding by these dies, the dies 17, 18, 19 for die casting are taken out and the scavenge air flow can be shaped.
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