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POLYMER TESTING | TECHNOLOGY


material, is automatically detected, visualised, and evaluated. The automated offline system is more accurate and more reproducible than an operator using a manual light table, says Sikora. The system determines the size of contamination, which is useful for quality control and process optimisation. For online inspection and sorting of plastic


material, Sikora recommends its Purity Scanner Advanced, which combines X-ray with optical technology to detect contamination inside plastic pellets as well as on their surface. The system uses an adaptive camera concept, with up to three optical cameras depending on the expected contamination and application. For example, an X-ray camera detects metallic contamination inside pellets; optical cameras identify yellow discolorations or black specks inside transparent and on opaque pellets; and colour deviations are detected by colour cameras. Contaminated pellets are sorted out automatically. The combination of online and offline inspection, sorting and analysis benefits quality control, and the data can be used to improve processes and to avoid future contamination, noted the company. In 2018, recycler and compounder Minger


Kunststofftechnik added Sikora’s online Purity Scanner Advanced system to its lines for recycling technical and high-performance polymers


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(including fluoropolymers, PEEK, PA, PE, and PP) at its site at Appenzell in Switzerland. The company uses the inspection system to ensure high material purity. Black spots, foreign particles, and metal particles are eliminated by the automated system. The scanner, combined with a processor to analyse and visualise the sorting, provides statistical evaluation of detected contamination sorted by number, size and frequency as well as an image gallery of contaminated granulates. This information is saved, and data such as the duration of the order, material type, throughput and rejection rate are also recorded, allowing full traceability after a project has been completed. “We use the production data as reference for future orders. Furthermore, we forward the information as a final report to our customer, who receives absolute technical transparency about his product and the production process,” says Minger CEO Bruno Ofner.


CLICK ON THE LINKS FOR MORE INFORMATION: � www.dynisco.com � www.leistritz.com � www.ivon.atwww.goettfert.com � www.anton-paar.com � www.exxonmobil.com � https://sikora.net/en/


Right: The Purity Concept V system from Sikora fully automates lab-based pellet


inspection


Below: Sikora’s automated pellet analysis is said to be more accurate and repeatable than manual light table techniques


PHOTO: SIKORA


PHOTO: SIKORA


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