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- During extrusion of PP, die pressure and apparent viscosity prominently decrease, and die temperature increase with ultrasonic treatment. 超声辐照使PP挤出过程中的口模压力、表观粘度显著下降,熔体指数增大,提高挤出产量达100%25。 超声挤出PP口模温升达10℃以上,降低了挤出物的出口膨胀率,挤出物表观质量有所提高。
- The results shows that die pressure ofextruder, relaxation time of polymer and geometrical parameters of die have significanteffect on stress tensor in extruder die. 模拟结果表明:机头压力、材料的松弛时间以及口模流道的几何尺寸对高聚物在机头中的应力张量的变化影响较大;
- Taking use of computing of shell body barycenter, a stamping die pressure center locating module is implemented on CATIA system with convenient operation and higher efficiency. 笔者提出了计算工艺件壳体重心求解压力中心的方法,在CATIA平台上实现了冲模压力中心的快速定位,操作简单方便,工作效率较高。
- The die pressure, apparent viscosity, flow activation energy of mPE and its blends reduce greatly, productivity increases in the presence of ultrasonic oscillations during extrusion. 超声频率的增加,功率越大,熔体表观粘度越低,平均作用时间越长,熔体表观粘度降低的程度也越大。 施加250W超声挤出可使mPE加工温度降低18℃、口模压力降低45%25、挤出产量增加1倍,而表观粘度则会降低近50%25。
- The experimental results show that die pressure of PA6 and PA6/HDPE blends is reduced remarkably in the presence of ultrasonic wave during extrusion, but the melt temperature and mass flow rate of PA6/HDPE get increased. 在PA6/HDPE体系的超声挤出过程中,超声辐照所提供的能量场作用、高频剪切振动会导致共混物熔体口模温度升高、口模压力降低、挤出产量提高,因此,超声辐照能有效改善共混体系的加工性能。
- According to the experimental data, the influences of parameters such as die pressure difference, screw rotate speed, and screw series on the extrusion processing and driving consumption were analyzed. 定性地分析了相关参数,如机头压力、螺杆转速、螺杆构型等对挤出过程以及功率消耗的影响。
- The design of extrusion complex die on unplasticized PVC pipes is presented.With the die pressure decrease in theory calculated during extursion applied scope of the die is verified in this paper. 介绍了硬质PVC管材挤出复合模头的设计,推导了模头的熔体流动、压力降,验证了模头的应用范围.
- Every winter some old people die from hypothermia. 每年冬天都有些老人死于体温过低。
- The beer comes out of the barrel under pressure. 啤酒受到压力从桶中流出。
- Little does he care whether we live or die. 他一点也不管我们是死是活。
- Our pressure vessel is licensed product. 我厂生产的压力容器是授权生产产品。
- Nowadays many people die of cancer. 现在有很多人死于癌症。
- Loss of pressure had not registered on the dials. 刻度盘未记录压力下降。
- Air pressure forces the water through the pipe. 空气压力使水通过管道。
- She's ambitious and eager to get on(in die world). 她雄心勃勃,迫切地想成功。
- Many of the wounded die on their way to hospital. 许多伤员死在去医院的途中了。
- What's the atmospheric pressure today? 今天的气压怎么样?
- I might as well die as marry him. 我与其嫁给他,倒不如去死算了。
- The water pressure may need adjusting. 水压可能需要调整。
- What if the boy's parents should die? 如果那男孩的父母死了该怎么办呢?