我公司铸造部在技术革新中,在半永久性铸型表面采用了密插洋钉的方法,大大地提高了半永久性铸型的使用寿命,铸件的产量及表面质量.铸型使用寿命由过去的平均浇注80~100次(铸件平均壁厚60~70公厘),增加到现在的350~400次以上,提高了3倍多.由于密 Casting Division in our company in technological innovation, in the semi-permanent mold surface using the method of dense-inserted foreign nails, which greatly improves the service life of semi-permanent mold, casting production and surface quality of the mold life from the past The average pouring 80 to 100 times (the average casting wall thickness of 60 to 70 mm), increased to the present 350 to 400 times or more, increased more than 3 times due to close