【摘要】 通过实验研究了荞麦、黑米、薏米三种谷物的混合物料为原料时，双螺杆挤压机的螺杆转速、物料湿度、机筒温度三种操作参数对双螺杆挤压机的挤压膨化效果（以糊化度衡量）的影响。依据可旋转中心组合实验设计及实验数据建立了相关的统计模型，通过对响应面和等高线的分析，得出了三种操作参数的最佳取值范围。本实验研究对于开发谷物膨化食品、探索双螺杆挤压机加工谷物原料的挤压机理具有重要的现实意义。更多还原

【Abstract】 The effects of varying screw speed，barrel temperature and moisture content on extrusion quality(expressed as degree of dextrinization)of materials comprised of buckwheat, melan-rice and coix were studied by using a co-rotating twin-screw extruder. The statistical model was established by using a rotate central composite design and response surface methodology.The operation parameters were conducted by triaxial contour map and isohypsic analysis. The experiment results showed great significance of exploitation of grist extrudate and the mechanism of the twin-screw extruder.更多还原