| 摘要 |
PROBLEM TO BE SOLVED: To provide an extrusion feed device capable of forming a composite extrudate in various shapes by receiving many kinds of extrudates in various feed forms although the device has a structure having one same discharge channel. SOLUTION: A plurality of cylindrical flow channels 3 and 4, which have annular openings 3a and 4a for feeding a molten resin being an extrudate, and an on-off valve 7 capable of opening and closing the cylindrical flow channel 4a are provided to the upstream end part 2a of a discharge channel 2 for discharging the composite extrudate. Since a resin 10a becoming an outside layer is always fed from the cylindrical flow channel 3 and the inside cylindrical flow channel 4 is controlled so as to be opened and closed by the on-off valve 7, a separate molten resin 10b is fed into the outside molten resin 10a in appropriate timing to form a multilayered resin as the composite extrudate wherein the resin of a separate kind is included in the outside resin. COPYRIGHT: (C)2005,JPO&NCIPI |
