| 摘要 |
The invention is an extruding device which includes a screw and a barrel wherein the screw includes a kneading portion whose cross-section differs from the cross-section of the remainder of the screw and the barrel includes a kneading portion whose cross-section differs from the cross-section of the remainder of the barrel and is opposite to the kneading portion of the screw, the cross-sections of the two kneading portions being such that the distance between a point on the periphery of the kneading portion of the screw and the nearest point on the interior surface of the barrel, measured in a radial direction, varies on rotation of the screw in the barrel. The extruding device exerts an improved kneading effect upon extruded material.
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