Industrial X-Ray Computed Tomography is very well suited to plastic injected components.
Even if traditional inspection methods such as Coordinate Measuring Machines (CMM) measurements or optical scanning can bring interesting results, they might need to be completed by X-Ray CT for a lot of applications.
X-Ray CT is particularly well adapted for plastic parts because of the relatively low density of common material used. Polyamide, polycarbonate, polyester, polypropylene and polyethylene are all very easily penetrated by X-Rays and determine low artefacts. It means that getting the inner and outer dimensions of parts will not be an issue for X-Ray CT technology: whatever the size of the sample, results obtained will be very accurate and obtained faster than with conventional techniques.
Contrary to other technologies, X-Ray CT does not need any particular preparation on the sample to be checked. No spray, no stickers, no probing program, the only thing that needs to be done before launching a scan is to choose a good orientation and an adapted sample holder to accommodate the part inside the system. Then everything can be automated and well-integrated in a fully robotised production line.
It is also possible to generate a mesh from external and internal structures quite easily with X-Ray CT. Point clouds can then be used as input parameters inside a finite element model, to perform comparison against an existing CAD file or create a new CAD through a reverse engineering process. The finite element analysis allows simulations to be more accurate by computing mechanical stress, strain, displacement or flow behaviour on the real part geometries taking voids, porosities, dense inclusions or cracks into consideration.