| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a clay extruder that prevents nonuniform density of the body inside a drum and that makes a highly homogeneous and superior columnar body to be obtained, and to provide a manufacturing method of the columnar body containing a ceramic raw material. <P>SOLUTION: The clay extruder 1 includes a drum 2 having a screw 4 having a rotary shaft 6, a spiral rotary blade 5 for feeding the clay under pressure while kneading the clay fed into the screw, a pressure raising portion 10 provided on the side of a feeding port 19 in the drum 2 to feed the clay under pressure while kneading the clay, and a rectifying portion 11 provided on the side of an extrusion port 20 in the drum 2 to rectify the clay into a columnar shape. The rectifying portion 11 has a rectifying rotary blade 7 which is installed so that an angle, formed between the face on the side of the extrusion port 20 in a sectional shape on a plane passing the central line of the rotary shaft 6 and the central line of the rotary shaft 6, gradually decreases as the rectifying rotary blade comes close to the extrusion port 20. The intervals in the rotary shaft 6 direction of the rectifying rotary blade 7 are longer than the intervals in the rotary shaft 6 direction of the rotary blade 5 in the pressure raising portion 10. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
