CAJ | 학술논문

具有配合关系的2个塑件一模两腔注塑成型时 ,容易产生填充、压力及温度不平衡等问题.文章通过理论计算和实验相结合的方法 ,分析了玩具电脑A、B面壳成型中存在的翘曲、飞边等缺陷 ,采用浇口平衡设计理论和有限元变截面法对该浇注系统进行优化设计.模拟结果表明 ,充填时间不平衡率控制在0.61% ,充填压力不平衡率控制在3.87% ,且翘曲值有所减小.优化后塑件缺陷分析结果表明 ,塑件飞边得到解决 ,翘曲有明显改善 ,从而说明流道平衡对改善塑件质量有较好的效果.
구유배합관계적2개소건일모량강주소성형시 ,용역산생전충、압력급온도불평형등문제.문장통과이론계산화실험상결합적방법 ,분석료완구전뇌A、B면각성형중존재적교곡、비변등결함 ,채용요구평형설계이론화유한원변절면법대해요주계통진행우화설계.모의결과표명 ,충전시간불평형솔공제재0.61% ,충전압력불평형솔공제재3.87% ,차교곡치유소감소.우화후소건결함분석결과표명 ,소건비변득도해결 ,교곡유명현개선 ,종이설명류도평형대개선소건질량유교호적효과.
The two plastic parts with cooperative relationship are apt to the problems such as unbal-anced filling ,pressure and temperature in double-cavity mold injection progress .In this paper ,the defects of toy computer A and B shells forming including warp and flash are discussed through the combination of theoretical calculation and experimental method .Furthermore ,the design theory of runner balance and the finite element method of variable section are applied to optimizing the gating system .The simulation results show that the filling time imbalance rate and the filling pressure imbal-ance rate should be controlled at 0.61% and 3.87% respectively ,and the warp value decreases to a certain extent .Finally ,the parts defects are analyzed through optimized experiment .The results show that plastic flash is solved and the w arp is improved significantly ,w hich indicates that runner balance has good effect in improving the quality of plastic parts .