摘要
根据气体辅助注射成型充模过程的特点，从流体力学基本理论出发，引入合理的假设和简化，建立了描述熔体运动和气体穿透的数学模型，并在边界条件中反映出气体穿透和表面张力对熔体充填的影响．
Gas-assisted injection molding is carried out in two steps: the polymer melt injection and the gas injection. Gas penetration is advantageous to the improvement of product quality and to the extension of the application range of such technology, but it makes the process more complicated. According to the specific features of the filling process of gas-assisted injection molding, a mathematical model governing the behavior of both the polymer melt and gas is developed based on the theory of fluid mechanics and assumptions. Gas pressure and temperature are the same everywhere in gas penetration region under the assumption that gas viscosity and heat transfer during gas penetration are neglected. The influence of gas penetration and surface tension on melt flow is to be considered in the boundary conditions. It is shown that with numerical solution of the model, the situation of the gas penetration can be predicted and the filling flow of the gas-assisted injection molding can be simulated.
出处
《华中理工大学学报》
CSCD
北大核心
1998年第2期23-25,共3页
Journal of Huazhong University of Science and Technology
基金
高等学校博士学科点专项科研基金!9448719
关键词
气体
注射成型
数学模型
计算机模拟
塑料成型
gas-assisted injection molding
mathematical model
computer simulation
