Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Development of a Housing Component for an Auto-compressor Using Vacuum Ladling Die Casting

진공급탕식 다이캐스팅법을 이용한 자동차 콤프레서용 하우징 부품 개발

  • 이항수 (한라대학교 기계자동차공학부) ;
  • 박정식 (깁스코리아다이캐스팅(유))
  • Received : 2011.12.07
  • Accepted : 2012.04.04
  • Published : 2012.06.01
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Abstract

A vacuum ladling die casting system is suggested as a means to obtain a high vacuum level. A high vacuum of 17.8 mmHg is obtained by sealing the inner space of the mould. The sample product is a rear-head housing for an auto-compressor, and the die-casting with 6-cavities was conducted. The flow analysis shows that the filling speed during vacuum ladling is faster than for a non-vacuum system. The air holes in the sample product were too small to be seen with the naked eye in X-ray films. Density tests show that the high vacuum ladling system reduces the internal porosity as much as 57.8% when compared to the non-vacuum system. A defective rate of only 0.17% was found from leak testing. The results of this research prove that the high vacuum die-casting process is useful for manufacturing of aluminium components under high internal pressure.

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References

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