Analysis of the formation and removal of gas bubbles in rotationally moulded thermoplastics
Analysis of the formation and removal of gas bubbles in rotationally moulded thermoplastics
复制标题
旋转模塑热塑性塑料中气泡的形成和去除分析
DOI：
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发表时间：
1993
影响因子：
4.5
通讯作者：
R. Crawford
中科院分区：
文献类型：
--
作者：
L. Xu;R. Crawford
内部气泡的存在是通过滚塑制造的热塑性产品的特征。模制品中的气泡通常是不希望的，因为如果它们出现在表面，它们会降低强度和刚度并损害产品的外观。气泡是由于粉末颗粒在工艺的加热阶段聚结而形成的，并且它们随后随着时间和温度而减小尺寸。本文提出了一个半经验模型来预测在任何特定的工艺条件下可能出现的气泡尺寸。
The presence of internal bubbles is a characteristic feature of thermoplastic products manufactured by rotational moulding. The bubbles in the mouldings are generally undesirable since they reduce strength and stiffness and impair the appearance of the product if they occur at the surface. The bubbles form as a result of powder particles coalescing during the heating stage of the process and they subsequently decrease in size as a function of time and temperature. This paper presents a semi-empirical model to predict the bubble size which is likely to occur under any specified processing conditions.