Meaning
Surface metrology techniques measure and analyze the physical profile of a solid surface to determine its roughness and finish. Quality control labs use profilometry to inspect the surface texture of injection mold cavities and ensure they meet design specifications. This analysis helps detect micro-wear on mold surfaces before it affects the release of molded parts.
Technique Category
Measurement methods are split into tactile stylus systems and optical non-contact systems to evaluate surface textures. Implementing profilometry with a mechanical stylus involves dragging a diamond tip across the surface to record height variations. Optical systems use light waves to perform the same task without any risk of scratching polished mold finishes.
Surface Analysis
Topographical data generated by these instruments provides detailed values for height and spacing parameters. Through profilometry, engineers can verify whether a mold surface is smooth enough to prevent polymer adhesion.
Quality Correlation
Part finish must be tracked continuously during production to monitor the gradual wear of the mold cavity. Applying profilometry to the molded parts provides a non-destructive way to monitor the degradation of the steel tool surface. When part roughness deviates from the specification, it indicates the mold needs cleaning or polishing, helping processors avoid producing large batches of non-conforming parts.
