COOLING WATER TANK FOR SYNTHETIC RESIN TUBULAR BODY

PROBLEM TO BE SOLVED: To provide a cooling water tank for a synthetic resin tubular body wherein cooling water not containing bubbles is fed to a water storage tank so that the cooling water cools the synthetic resin tubular body extruded from a die. SOLUTION: In the cooling water tank 1, a water storage tank 11 to cool a synthetic resin tubular body P extruded from a die and a cooling water feed tank 12 to feed cooling water to the tank 11 are parallelly provided through a partition wall 13. The tank 12 is divided into a first chamber 12A and a second chamber 12B by a partition plate 121 erected near the center of the tank 12. Cooling water fed from a cooling water feed port 122a opened at a position lower than the top end of the plate 121 in the chamber 12A overflows the plate 121 into the chamber 12B, and a cooling water inlet port 131 is opened in the wall 13 separating the chamber 12B from the tank 11 at a position lower than the top end of the plate 121 to introduce the cooling water into the tank 11.