| 摘要 |
PURPOSE: A synthetic resin profile pipe is provided to improve the productivity by a smooth cooling and the stress uniformly actuates with respect to an external force. CONSTITUTION: A synthetic resin profile pipe(30) is spirally wound with a synthetic resin tube. A resin is extruded in a gap between spiral portions so that a joint member is formed and the resin tube is fixed and connected by the joint member. A profile is a shape of an empty square. A pair of vertical barriers(31) is formed in a longitudinal direction inside the profile. A part of square edges of both sides and a central part of the profile are cut in a shape of an oblique side having an angle of inclination 45°. The profile comprises a grid-shaped section. |
