METHOD FOR RECOGNIZING WELDING OF PART TO BE VIBRATION WELDED

摘要

PROBLEM TO BE SOLVED: To accurately and rapidly confirm welding of a part to be vibration welded. SOLUTION: A confirmation hole 4 opposed to another part 5 to be vibration welded is formed through a part 3 to be vibration welded at the one part 3 to be vibration welded of first and second synthetic resin members 1, 2 to be vibration welded. Welding of both the parts 3, 5 to be vibration welded is confirmed by visually observing an entrance of a molten synthetic resin 6 into the hole 4 in a vibration welding step.