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3层共挤模具交汇夹角对单层厚度及离模胀大的调控机制
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作者 刘磊 王鑫杨 +4 位作者 李经纬 刘奎 杨天洋 靳国宝 赵丹阳 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2023年第12期71-79,共9页
聚合物共挤模具结构对制品成型质量有着重要影响,尤其是模具交汇夹角对熔体厚度及离模胀大有着明显的影响。文中采用Carreau黏度模型和Picard迭代计算方法,深入研究了外层为聚十二内酰胺(PA12)、中层为乙烯-醋酸乙烯酯共聚物(EVA)和内... 聚合物共挤模具结构对制品成型质量有着重要影响,尤其是模具交汇夹角对熔体厚度及离模胀大有着明显的影响。文中采用Carreau黏度模型和Picard迭代计算方法,深入研究了外层为聚十二内酰胺(PA12)、中层为乙烯-醋酸乙烯酯共聚物(EVA)和内层为聚丙烯(PP)的3层微管共挤过程的数值模拟。结果表明,外层熔体交汇夹角增大时,PA12厚度增加,EVA和PP厚度减小,内外径均减小,胀大率增大;中层熔体交汇夹角增大时,EVA厚度增大,PA12和PP厚度减小,内外径均减小,胀大率减小;两处熔体交汇夹角同时增大时,PA12和EVA厚度增大,PP厚度减小,内外径均减小,胀大率增大。3层共挤实验证明了模拟结果的正确性与有效性。该研究结果能够为聚合物多层共挤模具的流道结构设计提供了有价值的参考。 展开更多
关键词 聚合物共挤 交汇夹角 熔体厚度 离模胀大 模具设计
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A New Type Machine of Mixing-molding for Polyblends 被引量:1
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作者 汪传生 李利 边慧光 《Journal of Donghua University(English Edition)》 EI CAS 2009年第1期68-74,共7页
This paper introduces a new type machine for polyblends with excellent mixing capabilities of internal mixer and continuous molding character of extruder.The machine includes two functions - mixing and extrusion moldi... This paper introduces a new type machine for polyblends with excellent mixing capabilities of internal mixer and continuous molding character of extruder.The machine includes two functions - mixing and extrusion molding that have been composed together by rational design,so a tandem production mode - "batch + continuous" are opened up.The mathematical model of continuous mixing molding was established and verified availably by experimental research.The main physical mechanical property of vulcanizate,which had met national waterproof material standard,verified the machine practicability.The essential difference from other similar type machines is that this machine is not only suitable in producing granular and powder rubbers but also lumpish rubbers. 展开更多
关键词 mixing molding machine tandem production mode mathematical model lumpish rubber
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