INDUSTRY NEWS

How Multihead weigher works
Date:[2011-12-20 0:10:23] Views:2566 Posted by:Smart

A ‘typical target’ weight per pack might be 100 grams of a product. The product is fed to the top cone of the multihead weigher where it is dispersed to the pool/feed hoppers. Each pool/feed hopper drops the product into a weigh hopper beneath it as soon as the weigh hopper becomes empty.

The weigher’s CPU system determines the weight of product in each individual weigh hopper
and identifies which combination contains the weight closest to the target weight of 100g. The multihead weigher opens all the hoppers of this combination and the product falls, via a discharge chute, into a bagmaker or, alternatively, into a distribution system which places the product, for example, into trays. Dispersion is normally by gravity, vibration, rotating or centrifugal force, while feeding can be driven by vibration, gravity, belts, rotating motor or screw systems.

An extra layer of memory hoppers (‘booster hoppers’) can be added to store product which
has been weighed in the weigh hoppers but not used in a weighment, thus increasing the number of suitable combinations available to the computer and so increasing speed and accuracy.

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