Multihead Weigher

Sticky products

Fresh meat and fish, whether in a sauce or not, poultry and cheese (including grated cheese) can be moved along by using belts or screw feeders rather than vibration.

Granules and powders

While free-flowing, fine-grained powders can be weighed more cheaply by other means (such as cut-gate or linear weighers, or volumetric feeders), granules such as coffee granules and products such as loose tea can be weighed on today’s multiheads.

Fragile products

Weighers with more shallow angles of descent and various cushioned inserts have made it possible to pack delicate and brittle items such as hand-made chocolates and gourmet biscuits.

Complex products

Using mix-weighing combined with a distribution system tailored to deliver separate components into a tray, a ready meal can be assembled with just the right quantities of, say, rice, meat and vegetables in the appropriate compartments.

History & Applications of Multi-Head Weigher

The multihead weigher was first invented and brought to market in the early 1960s.

Multihead weighers were used initially for weighing certain vegetables. Their use expanded exponentially in the 1970s and 1980s when they were applied to the rapid weighing of snacks and confectionery into bags. What cherry tomatoes and crisps had in common was that they flowed easily through the machine and into the pack, with no more encouragement than gravity and a moderate level of vibration of the feeders. Since then, the accuracy and relative speed have been extended to many products which would in the early days of the technology have been seen as difficult to handle.

Today this kind of machine, thanks to its high speed and accuracy, has widely spread in the packaging industry and is produced worldwide by a number of manufacturers. Some manufacturers offer complete packaging lines, integrating the multihead weigher with other packaging machinery ranging from bagmakers (including Vertical Form Fill and Seal bagmakers) to traysealers and inspection systems. The latter include checkweighers and X-ray inspection systems.