| 摘要 |
PURPOSE:To make it possible to plasticize with a high uniformity a relatively wide range of resin materials by means of one kind of a screw by vibrating relatively the screw and a heating cylinder in the axial direction and kneading and plasticizing a resin material during the screw in the heating cylinder is rotated. CONSTITUTION:A resin material fed from a hopper is transferred to an apex part of a screw while the resin material is kneaded and melted along the groove of the screw 6 and the screw 6 is started to retreat in accordance with the amt. of the molten resin which has been stored at its apex. When this initial micro-retreat is detected by means of a screw position detecting sensor 13, an operation controlling means 14 vibrates a piston rod 9 with a very small amt. and with a high speed. The screw 6 thereby begins to perform a vibrational movement e.g., with number of vibration of 100-200Hz and with a vibrational amplitude of 1-30% by peak to peak against the aimed back pressure. The resin material to which this vibrational energy is given receives a more complicated force from a number of directions and the molten resin is kneaded more effectively and with a high uniformity. |
