| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for simply and efficiently producing a vent piece and the vent piece produced by this method. SOLUTION: A wire element 8b becoming a core is inserted in a pipe 8a. In this case, since the diameter of the pipe is set so as to be made larger than that of the wire element 8b so as to be capable of smoothly inserting the wire element 8b, the wire element 8b can be loosely inserted into the pipe 8a. Subsequently, by subjecting the pipe having the wire element 8b as the core to pultrusion, the core of the wire element 8b and the pipe 8a are bonded under pressure to be integrally deformed to form a long columnar element 9. This long columnar element is appropriately cut by a cutter 11 to produce a vent piece 10. |
