Analysis of fiber structure

GN ReSound A/S is a world leader within hearing aid and audiological equipment.

Problem
GN ReSound wanted to analyze the fiber structure in a toggle from their Alera product family. A toggle is a button with two positions used as a volume button. GN ReSound experienced problems with this part and wanted to explore differences in the fiber orientation of parts produced in different processes and materials.

Solution
Zebicon used computer tomography (CT scanning) for analyzing the small plastic part at the size of app. 8,5 mm x 3 mm x 3 mm. The result was a 3D file of the toggle's fiber structure, as well as a series of 2D sections in different planes and positions. The scanning revealed air inclusions and uneven injection.