| 摘要 |
PROBLEM TO BE SOLVED: To provide an extrusion method for a synthetic resin pipe capable of obtaining the synthetic resin pipe reduced in deformation by a simple method even if the synthetic resin pipe is formed by extrusion using a hard synthetic resin, for example, a blend resin comprising a styrenic thermoplastic elastomer and polypropylene as a raw material. SOLUTION: The synthetic resin pipe extruded from an extruder E is taken over while regulated to a predetermined outer diameter by one set of guide rolls 1, which have semicircular recessed grooves 11 carved in the peripheral surfaces thereof, under cooling within a cooling water tank C. COPYRIGHT: (C)2005,JPO&NCIPI |
