¡@¡@Àô«Oªk³W¹ï©ó¨®½ø¼o®ð±Æ©ñ¼Ð·Ç¤éÁÍÄYV¡A¤ÞÀºªº°ª¾Þ§@·Å«×©M°ªÀ£ÁY¤ñ¥H´£°ª¤ÞÀº®Ä²v©M´î¤Ö¼o®ð±Æ©ñ¬°¥¼¨Óµo®iÁͶդ§¤@¡A·í¤ÞÀº·Å«×°ª¨ì800oC©Î§ó°ª®É¡A¶Ç²ÎűÅK©Î¤£Äÿû²k±µ¤§±Æ®ðª[ºÞªº¨Ï¥Î·Å«×¦³©Ò¨î¡A±N»Ýn¨Ï¥Î§ó@°ª·Åªº§÷®Æ¡C
¥»§Þ³N¾ã¦X§Ö³t쫬»P¼Ò¨ã§Þ³N¡A¥|©P¤º§Ö³t¶}µo·s¥@¥NÁ¡¾À@¼öűÅK¡A@¼öűÅKÁ¡¾À±Æ®ðª[ºÞ±Ä¥Î@°ª·ÅD5S¤§Âì§ÜűÅK¡A¬y¹D¾À«p¬°3.2„b0.5mm¡A±Æ®ðª[ºÞ@¬ªº|¬°®ðÀ£1kgf/cm2¡A@°ª·Å¹F850oC¥B¨ã¨}¦nªº¼ö¶Ç¾É©Ê¡A¥i¦b°ª·Å¤U¾Þ§@¥B¦³®Ä±N¤ÞÀºªº°ª·Å´²¥X¡AÀô«Oªk³W¹ï©ó´kÂà¤U¤ÞÀº¤§±Æ©ñ´î¼on¨D¤éº¥ÄY®æ¤§®É,¥i¥H´£¨Ñ·~ªÌ¶i¦æ²£«~¶}µo¬ÛÃö¥\¯à´ú¸Õ¡A¨ÃÂǥѴú¸Õµ²ªG×§ï³]p¥H´£¤É¤ÞÀº®Ä¯à¡A¹F¨ì´î¤Ö±Æ®ð¶q¡A²Å¦XÀô«On¨D¤§¥Øªº¡C
¡@¡@Due to increasing strictness of environmental regulations on
waste gas emission from automotive, high operating temperature
and high compression ratio of engine is designed to reduce the
exhaust gas and increase the efficiency of engine. As traditional
exhaust manifold made by iron cast or stainless steel welding
is not suitable to run in high temperature, heat resistant material
is thus required for a new engine.
The technology integrates rapid prototyping (RP) with investment
casting to manufacture a cast iron engine exhaust manifold within
four weeks with thickness of 3.2„b0.5mm, without leakage under
pressure test of 1kgf/cm2, and working under 850oC. The newly
developed heat-resistant cast iron exhaust manifold is equipped
with high conductivity and excellent heat exhaust in high operating
temperature, required by function test in the process of rapid
product development. Design is revised based on testing result
to increase the engine efficacy, reduce exhaust volume and conform
to environmental regulations.