Meaning
Non-contact three-dimensional measurement of a physical object utilizes projected light patterns and camera systems to calculate surface coordinates. Utilizing optical structured light scanning allows molders to quickly capture the complete geometry of complex molded parts. This method compares the actual part shape to the original computer-aided design model to identify areas of warpage and sink marks.
It is more efficient than point-by-point tactile probing for parts with organic or freeform surfaces.
Measurement Process
A projector casts a series of parallel fringe patterns onto the part while digital cameras record the deformation of these patterns on the surface. Through optical structured light technology, the system calculates millions of coordinate points per second to generate a high-density point cloud. This scan is completed in seconds, providing a rapid assessment of the part’s overall shape.
Moulding Application
Verification of part shrinkage and warpage is a critical step during the mold trial and commissioning phase. Implementing optical structured light measurements during these trials helps process engineers see how adjustments to melt temperature, cooling time, and pack pressure affect the final dimensions of the part. This feedback loop is essential for optimizing the molding cycle before releasing the tool to production.
Data Yield
The generated color-coded deviation maps provide an intuitive representation of where the part deviates from the nominal CAD file. This use of optical structured light scanning replaces tabular coordinate reports, making it easier to identify and correct molding errors.
