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铸铜雕塑的传统工艺失蜡法的特点介绍

(2015-01-26 22:10:26)
标签:

失蜡铸造

铜雕

铜雕工艺品

西关打铜

西关铜艺


  失蜡法是一项古老的铸造工艺,尤其适用于铜雕塑产品的制作,铸造的技术原理起源于焚失法,焚失法最早见于商代中晚期,随着失蜡法应用的增多而逐渐的消失。

  “失蜡法”又名“熔模法”,其工艺在铸铜雕塑的铸造上首先是用蜡制作所要铸成的蜡模,然后在蜡模的外表涂上湿泥浆干后成为泥模。制泥模时也留好浇注口,涂上耐火材料使之硬化,阴干后加热使蜡熔化流出,再入窑焙烧,就形成了有空腔的铸型,把铸型埋入沙子中,从浇注口灌入熔化的青铜液,待青铜液冷却凝固后便可将所铸铜器取出。

  失蜡法铸造的优点是在制作铸模时不需要开模,外模也不用分成数块,空腔厚薄均匀,壁厚最小可以3毫米,铸件的形状很少受到工艺限制,表面有一定的光洁度,它的最大特点是用低熔点材料做“模”,简化了制模的工艺,可以制作任何器形,在铸造史上具有里程碑的意义,是我国三大铸造技术之一。所铸的青铜雕塑产品上没有范痕,也没有垫片的痕迹,耳、足、鉴等处都没有残存的范土,这些都是与陶范法铸造青铜器明显不同。



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