subject: twin and single screw extruder [print this page] As shown in Table 1, in the comparative example using the conventional single screw extruder, the roundnesses of the honeycomb formed bodies are greatly changed at the edge faces thereof due to the change of the amounts of extrusion as well as the roundnesses have large differences between one edge faces and the other edge faces, and further the roundnesses have large values. In contrast, in the example using the twin- screw extruder of the present invention, even if the amounts of extrusion change, the roundnesses of the edge faces of the honeycomb formed bodies are not so greatly changed, and the differences between the roundnesses of the one edge faces and the other faces and the values of the roundnesses are small as compared with those of the comparative example.
