摘要
通过试验研究和理论分析,研究了气辅成型工艺中气体穿透聚合物熔体的扩散特征。结果表明,在气体注射点近区,气体对聚合物熔体冲击程度较大,呈现出复杂流动形态及扩散特征;当气泡穿透到离注气点一定距离后才趋于均匀;在气泡末端,由于气体的二次穿透作用而使气泡变得细而长。研究结果对于气辅工艺开发和气辅模具设计有重要指导意义。
The diffused feature of gas penetration polymer melt during gas-assisted injection molding is studied. Results show the degree that gas lashed polymer melt is severe, and there are some complex fluid patterns and diffused feature near the point of gas injection. When there is some distance between the point to which the gas bubble penetrated the polymer melt and the point of gas injection, the gas bubble is even. At the tip of the gas bubble, it becomes long and thin for the second penetration. Some useful technology of gas-assisted injection molding development and mould design guildlines are obtained by means of experiment and theoretical analysis.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2005年第4期195-198,共4页
Journal of Mechanical Engineering
基金
国家科技攻关项目(2004BA907A19-2)吉林省科技厅自然科学基金(20020614)资助项目
关键词
气辅成型
高压气体
射流扩散特征
分析
Gas-assisted injection moulding High-pressure gas Efflux diffused feature Analysis
