| 摘要 |
PROBLEM TO BE SOLVED: To remove bubbles sticking on the surface of a pipe due to cavitation or the like in a process of cooling the pipe in former equipment which is used in a process of extrusion molding of the pipe. SOLUTION: This equipment has a forming die 101 forming a pipe P melt- extruded from a mouthpiece 107 of an extruder and a vacuum cooling water tank 102 cooling the pipe P, and a net 109 formed to be circular so that the pipe P can be inserted therethrough, by using a stretchable material, is disposed on a course of movement of the pipe P in the vacuum cooling water tank 102. Bubbles sticking on the surface of the pipe are wiped off by the net 109 coming into close contact with the surface of the pipe when the pipe P passes through inside the net and are removed thereby from the surface of the pipe P. |
