问题 问答题 简答题

什么叫筘路疵点?对于平纹织物如何避免筘路疵点以达到均匀丰满?

答案

参考答案:当织制经纱密度不很高的平纹织物时,经纱幅宽方向(也就是横向)的这种有规律的不均匀排列情况,在与纬纱交织过程中如不加以改变,那么所得织物将呈现出筘路疵点。

在织造过程中,利用上下层经纱张力不等,能避免布面上这种筘路疵点的出现。因为不等张力梭口中相邻经纱一根比较紧,一根比较松,交织中,由于紧层经纱迫使纬纱作较多的屈曲,从而纬纱对松层经纱产生较大的压力,使松层经纱获得较大的横向移动。虽然紧层经纱的横向移动实际上很小,但由于松层经纱的横向移动很大,即使打纬时受筘齿作用,也很少作反向移动回到原来位置。因而,可以消除经纱不均匀排列的缺点,避免筘路疵点的出现,达到布面均匀丰满的要求。

阅读理解

阅读理解。

     Tom is the son of a farm owner. One New Year's Day, when he was 15, his father asked him to

work on the farm for one year when he was free. Tom was unhappy with his father's idea. "That isn't my

job,  I have too much schoolwork to do." Hearing this, his father said,"I promise (许诺) to give you the

best present if you can finish one year's work." Tom thought for a while and agreed.

     Starting one Saturday, the boy got up early and worked hard until evening, just like any other farmer.  

Time passed quickly. Tom's crops (庄稼) grew well. On the last day of the year, the father called his son

to him, "I'm happy to see that you have worked very hard in the whole year," said the father, "Now, tell

me what you want. "

     The boy smiled and showed his father a big piece of bread made from his wheat. "I've already got the

best present. No pains, no gains. I think this is what you wanted me to know." His father was quite

pleased to hear that.

1. Where did Tom's father work?

                                                                              

2. What did Tom's father want him to do when he was 15?

                                                                              

3. How did Tom work on the farm in the whole year?

                                                                              

4. Did Tom get the best present at last?

                                                                              

5. What do you think of Tom's father?

                                                                              

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