| 摘要 |
A helical compressor having hollow male and female rotor components of the type used as a supercharger for an internal combustion engine. The compressor is provided with a manifold plate which cooperates with the manifold to evenly distribute the high pressure discharge from the compressor throughout the associated plenum or manifold. The hollow rotor components are cast by full mold casting techniques in which an expendable foam pattern is first made in a metal mold and then placed in a sand-filled flask and poured with an appropriate foundry metal. The interior and exterior surfaces of the rotor pattern parts having helically extending lands and grooves permitting helical ejection of the pattern parts from the mold.
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