| 摘要 |
PURPOSE:To uniformly disperse added powder by setting the thickness of a kneading disc for forming a kneading zone to 0.2 times or more as large as the diameter of a screw in a first half, setting it to 0.1 times or less as large as that in a second half, and further specifying the arraying angle of the disc. CONSTITUTION:A kneading zone length is set to a screw length L, which is ranged from 0.2XL to 0.4XL. The thickness of a kneading disc is set to 0.2XD in a first half and to 0.1XD in a second half, where the D is the diameter of the screw. Powder to be quantitatively supplied from a powder constant feeder 1 and chip to be quantitatively supplied from a chip constant feeder 2 are so kneaded in a kneading zone 3, KD section that the total length is L, and polymer is discharger. The deviation angle of the discs is set to 0-20 deg. thereby to enhance kneading effect and to reduce the deterioration the polymer. |
