Weight Filling

Fill-by-weight machinery

When weight filling is the better basis for dosing

Weight filling measures the product against a target mass rather than relying only on a fixed volume or timed flow. It can be useful when density varies, larger fills are involved or the declared pack quantity is naturally specified by weight. The feed system and the way it slows and stops are central to repeatability.

What affects a stable weight result?

The scale must see the container and product without disturbance. Conveyor vibration, contact with guide rails, hoses pulling on a moving platform and product continuing to fall after the feed signal stops can all affect the cycle. The empty-container tare also matters where container weight varies. The proposed sequence should therefore be tested with the real pack, not only with a calibration weight.

For semi-automatic operation, the operator must be able to place and remove containers consistently without slowing the process or disturbing the reading. For an automatic line, container spacing, clamping or indexing, reject logic and the interface to upstream and downstream conveyors must be defined as part of the project.

Information needed for a weight-filling quotation

• Product name, bulk density or liquid behaviour and a representative sample.
• Target fill weight, permitted tolerance and the full range of pack sizes.
• Empty-container weight variation and container dimensions.
• Required output, normal batch size and level of automation.
• Cleaning, dust, product-contact and changeover requirements.
• Conveyor height, utilities and any checkweigher or line controls that must connect.

Compare the semi-automatic bucket filling, peristaltic weigh filling, ATEX weigh filling and automatic granule weigh filling pages, then provide the same sample and pack information for each shortlisted route.