Multihead Weigher Suppliers & Manufacturers

A multihead combination weigher (also called a combination scale or multihead scale) achieves high-speed accurate weighing by simultaneously considering the individual weight of product in multiple weighing buckets and selecting the combination of buckets whose total is closest to the target weight. In a typical 14-head machine operating at 60 bags per minute, the computer evaluates thousands of possible bucket combinations per second, selects the closest combination, and simultaneously discharges those buckets through a central chute into the waiting bag below. The result is high fill accuracy (typically ±0.5–1g regardless of target weight) at high throughput. Multihead weighers are suitable for free-flowing solid products that can be spread and metered across the radial feeder trays: snacks (crisps, puffed snacks, popcorn), nuts and seeds (whole peanuts, almonds, cashews, mixed nuts), dried fruit (raisins, cranberries, mango pieces), fresh cut vegetables (broccoli florets, sliced beans, diced peppers), frozen vegetables, confectionery (hard candies, chocolate pieces, gummies), hardware parts (screws, bolts, clips), coffee beans (whole roasted). Multihead weighers are not suitable for fine powders, liquids, pastes, or very sticky products that would cling to and bridge the feeder surfaces. For sticky fresh produce or moist products, specialised radial feeder designs with reduced contact surfaces or anti-stick coatings are available.

Multihead weighers are classified by the number of weighing heads (buckets). More heads means faster speed and better combination accuracy. A 10-head machine suits lower-speed applications (20–40 bags per minute). A 14-head machine is the most common configuration for medium-speed snack and food packing (40–80 bags per minute). An 18-head machine suits higher-speed applications. A 32-head or higher-head-count machine is used for very high-speed production (100+ bags per minute) or very small target weights where many combinations are needed to achieve accuracy. Almost all multihead weighers are used in combination with a VFFS (vertical form-fill-seal) bag-making machine below, which forms the bag from roll-stock film, receives the weighed product discharge, and seals and cuts the bag. The multihead weigher mounts above the VFFS machine on a frame. The two machines must be matched for speed, bag size, and discharge timing. Sanitary wash-down designs for fresh, wet, and frozen product applications use stainless steel construction throughout, sealed electronics, IP65 or IP69K rated components, and smooth hygienic surfaces for CIP cleaning. Ishida (Japan), Yamato (Japan), and various Chinese manufacturers (including Heat and Control, Kenwei, and Multiweigh) supply multihead weighers globally. Chinese manufacturers offer competitive pricing on standard configurations. When sourcing, specify: product name and characteristics, target weight, bag size, required speed, and integration with specific VFFS machine models.