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SIKORA’s online system automatically detects and separates color deviations
Source:Adsale Plastics Network     Editor:VC    Date:24.Mar.2020

SIKORA has developed a special online inspection and sorting system that combines X-ray with optical technologies, which automatically detects and separates color deviations and metal inclusions down to a size of 50 μm.

 

Black specks and color deviations often lead to increased scrap rates in the production of plastic injection molded parts, but also in the manufacture of profiles, cables and pipes. The same applies to metal inclusions in the pellets, which leave traces in the end product and the processing machines and cause costs.

 

During pellets sampling, which is a common method for the industry, contamination often remain undetected because the sample amount in relation to the delivered quantity and to the actual amount of contamination is too low, according to SIKORA.

 

Furthermore, contamination can occur pooled in one or several bundles and also homogeneously spread over many bundles. Therefore, the taken samples are mostly used for simple offline incoming goods inspection.


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SIKORA has developed a special system that detects metallic contamination inside the pellet as well as black specks and burns on the pellet’s surface.

 

Online inspection and sorting of plastic pellets

 

As introduced, the online inspection and sorting system developed by SIKORA does not only use optical technologies, but also combines those optionally with an X-ray camera. Therefore, even the smallest in raw material including metal particles can be detected by the system.

 

Furthermore, black specks and color deviations are detected by the optical cameras. Faulty pellets are separated immediately after detection via compressed air.


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The system developed by SIKORA does not only use optical technologies, but also combines those optionally with an X-ray camera.


The integrated software provides the operator with a statistical evaluation with information about the size, area and number of the detected contaminants during production.

 

In addition, impurities are saved in an image gallery. The image information often gives a conclusion about the reason for contamination and support the operator in the optimization of the production processes. The recorded data is permanently retrievable and can be separately evaluated at any time.

 

A high resolution is not a guarantee for the elimination of black specks, color deviations and metal inclusions. A safe subsequent sorting process firstly requires a high detection probability.

 

SIKORA AG offers this as a unique feature by using up to four optical cameras and an X-ray unit. Depending on the expected contamination and application, the system is configured before dispatch according to the requirements of the operator. It detects and sorts out contamination down to a size of 50 µm.


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The gallery view of detected contamination by the online inspection and sorting system.

 

Benefits of optical separation and demetallization

 

By using the system developed by the company, repairs and follow-up costs can be avoided and costs for machines and personnel as well as down times and scrap can be significantly reduced, says SIKORA.

 

The delivery capability can not only be obtained, but can also be improved because unpredictable risks due to metallic contamination or no longer melting polymer burns can be eliminated, emphasizes SIKORA.

 

This is an important aspect especially for safety relevant products in the medical, aerospace and automotive area in order to prevent product failure.

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