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Product inspection systems measure product integrity by comparing inspection results of each product against the results of a single product with a proven integrity. The term Integrity is used to express the wholeness or completeness of a product being produced. The exact requirements of integrity checks will differ dependent on the product characteristics, method of production, quality benchmarks and type of inspection being carried out.
Each inspection technology has its limitations and areas where it excels. All the technologies mentioned below offer different levels of integrity checking as a standard inspection capability.
Checks need to be made that the right number of contents are in a package and that they are in the right place. A simple weight measurement will enable the correct content count but an additional visual inspection would be required to determine any placement errors and specify any remedial action necessary to eliminate the root cause.
Malformed products or components can cause serious disruption during production by damaging downstream equipment. There are many factors which can lead to errors during component or container forging and moulding processes which can have a damaging potential. Weight inspection may detect this error but a visual or x-ray inspection would be the better choice of equipment to detect this.
A damaged, not correctly closed or incorrect final packaging can cause damage to downstream equipment and also, under certain circumstances, cause end customer safety issues. Checkweighers can readily detect open flaps on packaging using sensors. X-ray inspection systems can check for damaged packaging but only a camera inspection system can detect both as well as checking packaging details to pick up mislabelling issues.