Checking of plastic weld seams.


Checking of plastic weld seams

The process of checking plastic weld seams is very similar to the process of defect analysis. Areas with cavities differ from defect-free areas in the ultrasound image as these inhomogenities act as inner separation layers that attenuate the transmitted ultrasonic waves. There are two different measuring methods:

  1. Transmitter and receiver are positioned on the left and right side of the weld seam and the sonic waves are transmitted directly through the seam. Therefore it possible to detect inclusions or cavities just like in the process of a common defect analysis.
  2. Transmitter and receiver are positioned above and below the weld seam. The ultrasonic is directed over the surface of the weld seams and received on the other side. In method enables drawing additional conclusions about the quality of the bonding.