| 摘要 |
PROBLEM TO BE SOLVED: To mold a resin tube without letting the stress remain in its surface layer part and the mechanical properties deteriorate. SOLUTION: In a water bath into which the tube immediately after the extrusion from an extrusion die is to be introduced, a cooling water is introduced which is kept warm and controlled at ordinary temperature or above, the extruded tube is introduced into the water bath, and the resin temperature of the tube is maintained at a predetermined standard temperature or higher until the shape becomes stable. COPYRIGHT: (C)2006,JPO&NCIPI |
