Image processing systems
Fast color inspection in injection molding production
The image processing system from Vision & Control carries out color checks in fractions of a second. This is intended to ensure higher quality, including in the production of small injection-molded parts.
LISI-Automotive in Mellrichstadt produces a wide range of small parts for the automotive industry. These include plastic clips made from different materials in the same injection mold. The granulates are colored differently to distinguish them. As small parts from the previous batch can be overlooked in the feed during changeover, reliable color control is crucial for production quality.
With the vicosys 5400 multi-camera image processing system, Vision & Control has expanded quality control to include color inspection. At the heart of the inspection system is the vicosys 5400 image processing system, which can trigger up to 16 cameras asynchronously in combination with the ADDI DATA 16/16 digital expansion card. The images are supplied by the compact BFS-PGE-04S2C-CS PoE Gigabit Ethernet camera together with the VCN 1.8/50 entocentric lens. The diffuse white LED surface illumination DL30x30-W5K7/24V, in combination with the STE30x30-VIS beam splitter unit for coaxial one-way mirroring, ensures optimum illumination.
Using the Windows-based programming environment vcwin, a test sequence was created that uses blob analysis to find the center of the test specimen and then performs a color test. This works so quickly that a high cycle rate of around 300 ms/part can be maintained without errors despite the existing checks, for example for overmolding or defects from several perspectives. as
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