振动力场下背压对喷嘴内熔体压力的影响  

Effect of Back Pressure on Nozzle Pressure of Melt in Vibration Force Field

作　　者：周伟华 刘斌[1] 瞿金平 

机构地区：[1]华南理工大学聚合物成型加工工程教育部重点实验室聚合物新型成型装备国家工程中心,广东广州510640

出　　处：《塑料科技》2007年第11期38-40,共3页Plastics Science and Technology

基　　金：国家自然科学基金重大资助项目(10590351)

摘　　要：用聚丙烯做原料,通过对空注射实验,测定了在一定振动条件和背压下喷嘴中的熔体压力。结果表明:振动有助于提高喷嘴中熔体的压力,最大提高约50%;与稳态注射相比,振动能减弱塑化过程中熔体的黏度突变带来的影响;在振动频率为10Hz,振幅为0.08mm时,喷嘴内熔体压力达到最大。Through the experiments of air shot for polypropylene, melt pressure in nozzle under given vibration conditions and back pressure was measured. The results show that vibration is helpful to enhance the melt pressure and the maximum pressure can be increased by 50%. Vibration may weaken the influence of the viscosity mutation of melt. The maximum melt pressure in nozzle is achieved when the frequency is about 10Hz and the amplitude is 0.08mm

关 键 词：背压 振动 喷嘴压力 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]