问题
问答题 简答题
挤出成型工艺中提高固体输送的主要途径是什么？
答案
参考答案：
（1）螺杆直径不变时，增大螺槽宽度
（2）减小聚合物与螺杆的摩擦系数fs
（3）增大聚合物与料筒的摩擦系数fb
（4）减小螺旋角b
（5）从工艺角度上考虑送料段料筒和螺杆的温度疏松、粉状的热塑性塑料烧结在一起。
化学法：发泡气体是通过混合原料的某些组分在过程中的化学作用而产生。
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挤出成型工艺中提高固体输送的主要途径是什么？
参考答案：
（1）螺杆直径不变时，增大螺槽宽度
（2）减小聚合物与螺杆的摩擦系数fs
（3）增大聚合物与料筒的摩擦系数fb
（4）减小螺旋角b
（5）从工艺角度上考虑送料段料筒和螺杆的温度疏松、粉状的热塑性塑料烧结在一起。
化学法：发泡气体是通过混合原料的某些组分在过程中的化学作用而产生。
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| My children and I were finishing the last minute preparations for Kathy's birthday celebration. At one store we had bought a 1 balloon with Kathy's favorite character design on it. We had to make one more stop at another store to complete our 2 . I sent my older daughter and her little brother out to our 3 while my other daughter and I were 4 at the cashier line. A very short time later, my older daughter with little brother came running back into the store; upset that Kathy's birthday balloon had 5 while they trying to get into the car. I was tired from 6 , but I sent them back to the vehicle 7 them not to worry because we would get Kathy another 8 . I paid for our purchases all the while trying to think of the most expedient place to 9 another balloon. As Kathy and I 10 our car a lady with 11 face came up to us. She 12 some folded bills in my hand. She 13 to me that she had seen what had happened and did not 14 my older daughter or my younger daughter to be 15 at the loss of the balloon. I thanked her for kindness and 16 to give her the money back; as it was not a 17 to get another balloon. But she said, "I 18 children and I like to see them be happy." I was overwhelmed by the 39 of a total stranger that my daughters and I hugged the lady 40 her for kindness. She left so quickly that I was unable to even ask her name. Finally, I looked in my hand what I found was not just a single one dollar bill but four one dollar bills. | ||||
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