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Filling & Dosing system
Addtime:2013-8-19        Show:144

Filling & Dosing system

Filling and dosing system is an important part of packaging machines which measure out a product from a bulk tank supply by some predetermined value, e.g. volume, level in a container, mass or count. The filling method used is influenced largely by the nature of the product e.g. liquid, gas, piece goods, powder, free flowing solids or sticky paste, but also by the measure for selling the product e.g. by weight, by volume or by count.

However, it does not necessarily follow that products which are sold by volume have to be measured by volume, for example oils which are sold by volume are frequently filled by weight because the density of the oil varies significantly with temperature; conversely products like rice or frozen peas which are sold by weight may actually be filled by volume because this can be done at higher speed and lower cost. In fact it is common for products sold by count but filled by weight.

Filling machines may comprise of one or a number of dosing devices that may be arranged with or without a mechanism to control containers or packages as they are filled.

Volumetric and level filling is typically associated with liquid or gas products, but a whole range of products also use this technology including dry products such as powders and granules, pet foods, through to semi-liquids such as gels and pastes, or even products which are normally solid at room temperature like fats, lipstick and stick deodorants.

Different methods of filling have been developed not only to accommodate the different characteristics of the product but also to achieve various accuracies of fill, because while for a low value product there may be no incentive to fill more accurately than the statutory requirements, for high value product increased accuracy can represent a considerable saving in product "giveaway".

The filling of powders and free flowing solids poses particular problems because of the generation of dust and variations in bulk density. Very dusty products are typically filled using auger fillers or vacuum fillers, but where the bulk density of product varies significantly it will usually be necessary to combine this with a weight correction mechanism like a checkweigher because typically these products are sold by weight.

The two most common arrangements of fillers with multiple weighing filling heads are 'in line' where the filling heads are fixed and containers are moved under the heads and then removed when filled in an intermittent process, and 'Rotary' where several filling heads are mounted on a rotating carousel and containers are fed onto the carousel, filled and then discharged continuously.

NEOPACK INTERNATION LIMITED can supply a wide variety of filling and dosing system as customer product, Precision stability and durability, Better for your choose.

 ---Originally published in, Please indicate the source!

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