The wall thickness of containers is an important parameter in the packaging industry, for example for bottles. It determines whether the packaging has the required strength or whether perhaps even too much material is used, which can cause not inconsiderable costs in the mass market. Learn here how to use the automatic wall thickness measurement in WinWerth® and how to evaluate the measurement results.

X-ray tomography uses the ability of X-rays to penetrate objects. Mathematical methods can be used to calculate a volume model from the radiographic images in different rotational positions, which fully describes the geometry and material distribution of the workpiece. In the case of materials that are easy to penetrate, such as plastic, this measuring method is increasingly becoming a prerequisite for manufacturers’ competitiveness. One prerequisite for this was the development of the Werth TomoScope® XS family based on low-cost and low-maintenance X-ray sources.

The wall thickness can be evaluated on any CT point clouds using the “3D wall thickness measurement” software procedure. The result is the minimum and maximum wall thickness as well as the average value for the selected area. An automatic color-coded display of the deviations from the target wall thickness is also possible. In the bottle in the image above, you can see very clearly that the wall is too thick at the constriction marked in red and too thin in the lower part marked in purple. With only one calculation process, the 3D wall thickness of the entire workpiece can be determined. When evaluating on 2D section contours (below), the opposite points are connected by color-coded spines.