本文对挤压机的结构及工作原理，挤压膨化后料粒结构的变化及其对制油工艺的影响等进行了评述。

In this paper, the structure and work principle of extruder, the changes of extruded pellets and the influence of extrusion on oil extraction are discussed.

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米糠挤压膨化预处理浸出工艺是米糠制油工艺的最佳选择，也是解决米糠浸出制油过程中毛米糠油酸值升高，提高油脂加工得率的行之有效的方法。

The expelling-expansion pretreatment of rice bran was the best choice for preparation of rice bran oil, which could inhibit the acid value increase of rice bran oil and improve the oil yield.

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