5XFZ15型清粮机为重力选和风筛选组合式复式清选机,可一次完成麦类、豆类及玉米等物料的清选分级作业。用该机对白瓜籽进行清选分级作业时,因其分级筛箱过短,对白瓜籽的分级效果不是很理想,达不到外贸部门收购所要求的质量标准。据用户反映,白瓜籽的一次清选分级合格率低于80%, 5XFZ15-type grain cleaning machine for the gravity selection and wind screening combined double sorting machine, wheat, beans and corn and other materials can be completed a clear grading operation. When using this machine to sort and classify white melon seeds, the classification effect on white melon seeds is not very satisfactory because of the grading sieve box, which can not meet the quality standards required by the acquisition of foreign trade departments. According to the user, a clear pass rate of less than 80%