| 摘要 |
PURPOSE:To improve a mixing effect and increase production by a method wherein a mixing section consisting of a main screw having a comparatively steel lead angle and a subscrew groove crossing the main screw with a comparatively gentle lead angle is provided at a proper position of the screw. CONSTITUTION:The mixing section 7 constituted of the main screw 9 having the comparatively steep lead angle and a plurality of subscrew grooves 10 crossing the main screw 9 continuously in a whole length of the mixing section 7 is provided at a proper position of the screw 1. A flow in the screw direction X along the main screw 9 and a flow crossing the former flow are caused in the half-molten resin being fed from a feed screw section while a turbulent flow Y is caused in the groove section to mix the resin sufficiently. Since the mixing effect is improved, the depth of the groove section may be made deeper, at the same time, the number of revolutions of the screw 1 may be increased, therefore, the production may be increased. |
