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3抽真空形成的分层3.1抽真空对分层形成的影响在20世纪30年代联合真空挤出机的引进(欧洲从美国引进——译者注),代表着陶瓷坯体(含砖瓦在内——译者注)挤出成型非常重要的技术进步。现今在挤出成型技术上公认的事实就是:包裹在坯体原材料中的绝大多数空气被压缩之后按照成型的需要而被抽出,尽管在实际中与之相关的基本物理过程总是
3 layered vacuum evacuation 3.1 The impact of vacuum on the formation of stratification In the 1930s the introduction of joint vacuum extruder (Europe imported from the United States), on behalf of the ceramic body (including brick in the Inside - Translator’s Note) extrusion molding is very important technical progress. It is now recognized in the extrusion molding technology that the vast majority of the air contained in the raw material of the blank is compressed and then extracted according to the need of forming although the actual physical process associated therewith is always