Push-out device, method for cleaning same, and method for manufacturing molded article using push-out device

The invention provides a push-out device capable of shortening interruption time of material push-out caused by cleaning, a cleaning method thereof, and a method for manufacturing a molded article using the push-out device. A push-out device (1) according to the present invention is provided with: a cylinder (20) having an opening at the tip thereof and into which a material is supplied; a screw (21) which is inserted into the cylinder (20) and which pushes out the material from the opening by advancing and/or rotating; and a reducing gas supply unit which is provided in the cylinder (20) and supplies a reducing gas into the cylinder (20). 本发明提供一种能够缩短清扫引起的材料推出的中断时间的推出装置及其清洗方法以及使用推出装置的成型品的制造方法。基于本发明的推出装置(1)具备：缸体(20)，在前端部具有开口，被向内部供给材料；螺杆(21)，插通在缸体(20)内，用于通过前进和/或旋转从开口推出材料；及还原性气体供给部，设置于缸体(20)，用于向缸体(20)的内部供给还原性气体。