Combination Weigher Weighing Principle and Workflow

A combination weigher, also known as a multihead weigher, is a high-precision automatic weighing device that applies advanced technology and intelligent algorithms. It is widely used in industries with strict measurement requirements, including food, pharmaceuticals, and daily chemicals.

By ensuring accurate measurement, automation, and intelligent management, combination weighers enhance production efficiency and product quality. They can automate the entire packaging process—from feeding, metering, and filling to date printing—greatly reducing manual labor and operational costs.

What Is the Weighing Principle of a Combination Weigher?

The core weighing principle of a combination weigher is based on simultaneous weighing using multiple independent weighing units, typically ranging from 8 to 32.

• Each weighing hopper records the material weight.

• The built-in control system compares data with the target weight.

• An optimization algorithm selects the best combination closest to the preset value.

This method ensures packaging accuracy, reduces overweight or underweight errors, saves raw materials, and improves batch acceptance rates.

How Does a Combination Weigher Work?

1. Feeding

Products are transferred to the infeed funnel by conveyor and evenly distributed into linear vibrator pans by the vibration of the top cone.

2. Distribution

From the linear vibrator pans, products drop into feed hoppers. After the weighing hopper completes the previous cycle, the feed hopper opens to release product into the weighing hopper.

3. Combination

The CPU receives data from each weighing hopper and calculates the most accurate combination according to the target weight.

4. Discharging Methods

There are four ways to discharge products into the next equipment:

1. Direct Discharge (Timing Hopper = 0): Products are discharged directly from the collecting funnel.

2. Timing Hopper Discharge (Timing Hopper = 1): Products are stored in a timing hopper, then discharged to reduce drop time.

3. 

4. Dual Equipment Discharge (Timing Hopper = 2): Products are stored in a timing hopper, then discharged into two machines separately, maximizing high-speed output.

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6. Timing Hopper + Auto-Sorting (Timing Hopper = 3): Products are stored in the timing hopper, and unqualified weights are automatically sorted into a reject channel.

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Guangdong Kenwei – Leading Manufacturer in China

Guangdong Kenwei is one of China’s top manufacturers of combination weighers, with an annual production capacity of over 10,000 units. Its multihead weighers are widely applied in weighing and packaging of cereals, snacks, frozen foods, and other products, making it a trusted partner for global food producers.