Dosing Screw Fills Packages, Bottles, Bags, Tubs

For filling packages, bottles, bags, or tubs during process, the Van Beek dosing screw is effective in the chemical and food industry. For volumetric weighing the number of revolutions determines the dosing. There are different options for determining how many revolutions the screw must make. Van Beek measures how much product comes out of the screw per revolution and then it is clear how many revolutions are needed to achieve the required quantity. The screw is then adjusted for this.

For products with good running qualities this is often accurate enough, but in the case of sticky products like flour gravimetric weighing is preferable. A weighing belt then measures the weight of the packaging while the dosing screw fills it. The weighing belt sends a signal to the screw as soon as the required weight is reached.

Instead of the weight of the packaging the weight of the dosing installation can also be weighed (loss in weight). The loss in weight of the installation then determines the dosing.

A useful extension for products with poor running qualities is a stirrer. This has its own drive operating at a fixed speed. For example, the screw is filled to the optimum, which is important in volumetric applications. The dosing accuracy is then maintained and reproducible.

Another possible option is a pneumatically operated refill valve. This shuts off the screw outlet as soon as the required weight is reached.

There is also a solution for fast, yet accurate filling of large packages: the double dosing screw. A large screw brings the weight for example to 19.5 kg and then stops. A smaller screw continues running and fills it to the required weight of for example 20 kg.

Van Beek, Drunen, The Netherlands +31(0)416 37 52 25 www.van-beek.nl

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