工程塑料应用
工程塑料應用
공정소료응용
ENGINEERING PLASTICS APPLICATION
2013年
4期
51-54
,共4页
注塑机%螺杆选型%塑化质量%数值模拟
註塑機%螺桿選型%塑化質量%數值模擬
주소궤%라간선형%소화질량%수치모의
injection machine%screw selection%plasticizing property%numerical simulation
根据生产实际设计销钉型、屏障型及菠萝型三种螺杆混炼元件,并借助于计算流体动力学软件POLYFLOW分别对位于计量段末端的三种类型混炼段进行数值仿真,对比分析其混炼性能和塑化质量。结果表明,三种构型混炼元件中,屏障型混炼元件出入口压力降最小,销钉型压力降最大,菠萝型压力降介于两者之间;菠萝型混炼元件拉伸速率最大,销钉型与屏障型相似;菠萝型混炼元件混合指数最大,销钉型次之,屏障型最小。
根據生產實際設計銷釘型、屏障型及菠蘿型三種螺桿混煉元件,併藉助于計算流體動力學軟件POLYFLOW分彆對位于計量段末耑的三種類型混煉段進行數值倣真,對比分析其混煉性能和塑化質量。結果錶明,三種構型混煉元件中,屏障型混煉元件齣入口壓力降最小,銷釘型壓力降最大,菠蘿型壓力降介于兩者之間;菠蘿型混煉元件拉伸速率最大,銷釘型與屏障型相似;菠蘿型混煉元件混閤指數最大,銷釘型次之,屏障型最小。
근거생산실제설계소정형、병장형급파라형삼충라간혼련원건,병차조우계산류체동역학연건POLYFLOW분별대위우계량단말단적삼충류형혼련단진행수치방진,대비분석기혼련성능화소화질량。결과표명,삼충구형혼련원건중,병장형혼련원건출입구압력강최소,소정형압력강최대,파라형압력강개우량자지간;파라형혼련원건랍신속솔최대,소정형여병장형상사;파라형혼련원건혼합지수최대,소정형차지,병장형최소。
Based on production process,three kinds of screw mixing units were designed:pin mixer,barrier mixer and pineapple mixer.Numerical simulation was carried out on the three mixing sections in the metering section based on the CFD software POLYFLOW,and comparative study was performed on the mixing properties and plasticizing quality among them.The results show that the differential pressure of exit and entrance in the barrier runner is minimum,that in the pin runner is maximum and the pressure dropdown in the pineapple between them.Moreover,the rate of stretching is larger in the pineapple mixer than in the other two mixers which are haply similar in curves.For the mixing index,the pineapple behaves best,the pin better and the barrier mixer worst.These conclusions provide a reference for the configuration of injection molding machine,selection of screws and their application.