消失模铸造发泡工艺的研究

Foaming Technique Research On Mould Extinction Cast

采用了热水预发泡工艺及蒸锅成型发泡工艺对消失模的发泡进行了试验,研究了预发工艺对聚苯乙烯模样密度及模样质量的影响,试验结果表明,在影响模样密度及模样质量的诸多因素中,预发时间,预发温度,成型时间,成型压力等为主要因素,熟化时间,熟化温度是次要因素;发泡工艺与模样密度又制约了其成型发泡工艺;对不同密度要求的模样,应采用不同的成型工艺。

Adopting both the prefoaming by water heating and the shape foaming with boiler,a test is made on mould extinction foaming,with effective influence caused to the mould sample quality and the mould density made up of polystynene researched concerning prefoaming process.The result shows there are many factors effecting mould quality and density such as prefoaming time,temperature,shaping pressure being regarded as the important factors,however,ripening time and temperature as the less important once.Foaming and mould sample density constrain the foaming process in shaping.In consideration of different mould samples,a different foaming technique should be used in respect.