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蜡料和蜡模制造 由于环境保护方面的原因,蜡料生产厂商几年前就不得不取消含氯的填料。这一改变使蜡料的压注性能显著变差,还特别对硬化时间不利。因为含氯的填料比热和熔化热焓较小,加有填料的蜡粘度较高,脱蜡后型壳中往往有较多的残留蜡料,容易形成严重的裂纹,尤以芳香族填料为甚。另外,形成亮碳的可能性明显增大,从而使铸件的表面缺陷大大增加。H.R.Linhardt报导了为消除上述缺点,用水作为填料的研究工作情况。
Wax and Wax Molding Because of environmental concerns, wax manufacturers have had to cancel chlorine-containing packagings a few years ago. This change significantly deteriorates the wax injection properties and, in particular, adversely affects the hardening time. Because chlorine-containing fillers have lower specific heat and lower enthalpy of melting, waxes with fillers have higher viscosities and tend to have more residual waxes in the dewaxing shell, which leads to the formation of severe cracks easily, especially the aromatic fillers are very. In addition, the possibility of forming bright carbon is significantly increased, thereby greatly increasing the surface defects of the castings. H.R.Linhardt reported to eliminate the above shortcomings, water as a filler research work.