At the very end there is a metal detector of 2mm sensitivity . The purchasing manager commented that in some factories there are vertical metal detection with 0,7 mm sensitivity. This is true. This has been invented already. Time to time we are sendinging to sub-contractor for such segregation. Normally in 10 tons of spice you get 5-10 pieces of foreign matters -mostly consisting of alumina folyo pieces- coming from cigarette packaging. But in I would like draw your attention to the quantity scanned : 10 tons. And segragated particles 1-3 grams.
By no means anything havier – with higher density – is segragated in the gravity separators with works with blowing air suspention system. Very powerful magnets produced by Neon-Boron with 8000 gauss attracting power are already in the line segragated even magnetised spice flakes by friction.
Anything with lighter density is already carried out by air suction.
At the end indeed you “may” get a cleaner (!) product but at the expense of quite complicated machinary to segregate % 0,0001 innoxious foreign matters. Instead of focusing ourselves into more fundamental issues we are waisting our time and money .
Another discussions was made at the same encounter. We have a good amount of trees and flower plants in the surrounding of our factory. The visitor has congratulated me for having such a green environment . I replied that these are what escaped from our Quality Manager extermination plan. As according to the up-to-date Quality Assurrance Systems no plants are requested nearby as they can habour pests.
What a contradiction!
Avram Aji
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