文中描述的以双基火药半固体流动模型为基础的双基火药螺旋挤出等温粘性流动理论给出了一组螺压机的输出速率、正常拖曳应力、挤出压力和功率消耗等计算公式。这些公式包含了上述参量对火药物理性质,操作条件和挤出机结构的依赖关系。与实验结果比较表明,本文描述的理论反映了在一定条件下挤出过程的真实情况。 The theory of helical extrusion isothermal viscous flow based on the semi-solid flow model of double base propellant is described in this paper. The formulas of output rate, normal drag stress, extrusion pressure and power consumption of a screw press are given. These formulas include the dependence of the above parameters on the physical properties of the powder, the operating conditions and the structure of the extruder. Compared with the experimental results show that the theory described in this article reflects the real situation of the extrusion process under certain conditions.