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Weighing and Packing Machines

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Popular Weighing and Filling Machines

View our wide range of innovative industrial packaging machines to speed up and automate your production line.

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Types of Weighing and Bagging Machines

Autopack supplies both net weigher machines and gross weigher machines. However, our primary focus is net weighers, of which we offer two types: linear weighers and multi-head combination weighers. These types vary in terms of product characteristics, accuracy, speed and budget. Both our linear weigher machines and our multi-head options can be supplied as semi-automatic weighing systems or can be fully integrated with a packaging machine.

Linear weighers

A linear weigher is normally a net weigher machine and consists of a hopper containing the product that is to be loaded and a conveyor belt collecting the product out of the bottom of the hopper. It is called a linear weigher because it uses a straight-line feeding system.

Multihead weighers

A multi-head weigher can be linear or radial in design and operates by feeding the product into a main hopper, which then distributes the product evenly to each of the individual weighing hoppers or buckets. Each bucket weighs the product and sends a signal to a central control system to achieve the target weight. Then, the machine opens the hoppers to dispense the correct amount of product into the container.

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What is a weighing and packaging machine?

A weigher machine is a type of packaging equipment used to accurately weigh and dispense a predetermined quantity of product into packaging containers, such as bags, pouches or cartons. Weighing machines fall into two categories, based on how they weigh products. These are gross weighers and net weighers. A gross weigher machine dispenses into the packaging material – be it a container, bag or pouch – when the weighing process is carried out. The packaging material is usually automatically tared off before the product starts to fill into the pack and stops when it has reached its set point. On the other hand, net weigher machines use a hopper attached to a load cell to collect the product and discharge it when the set quantity has been dispensed into the packaging material.

Both weigher machine types run at a speed or flow that moves the product into the package or weigh hopper when required and the movement stops when the set weight has been achieved. More sophisticated systems have multiple weigh points, allowing the movement or flow of the product to be slowed when it is getting close to the final set point, which increases accuracy. Weigher machines can be made up of single, linear or multi-head machines – and this choice, as well as which weigher machine to use, is dependent on your product characteristics and choice of packaging. Both gross and net weighers can be used as semi-automatic weighing machines or integrated into automatic packaging machines that synchronise filling with the packaging machine operation.

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The benefits of automatic weighing machines

Weighing machines offer a range of benefits in industrial and commercial settings.

Firstly, weighing machines increase productivity, as they can weigh and package products at a much faster rate than manual weighing – increasing productivity and output, as well as preventing mistakes or repetitive strain injury for employees.

 

Weigher machines also give the confidence of assured repeatability and accuracy in measurement compared to a manual process, which guarantees consistency in product quality and quantity, whilst reducing the risk of error or product waste. Their use also guards against overproduction – another form of waste that reduces profit margins.

 

Another benefit of weigher machines is that they are extremely flexible and adaptable, allowing for a wide range of products and packaging types to be used and created, with minimal time required to change or clean parts. This enables manufacturers to create variety in production output, expanding business opportunities.

 

When packaging automation is being considered, an automatic weighing machine is the only solution to keep up with the speed of production – and by automatically weighing products for packaging, a weigher machine can reduce labour costs, which increases profit margins for the company. Also, in some industries, such as food, beverage, cosmetics and pharmaceuticals, where strict compliance with regulations is required, a weigher machine can guarantee conformity.

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All our weighers are available in plain stainless steel, dimple and PTFE coated.

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All the weighers are tool free with quick-release systems to allow for easy cleaning.

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We hold the widest selection of weighers in stock in the UK.
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View our wide range of innovative industrial packaging machines to speed up and automate your production line.

The choice between a linear weigher and a multi-head combination weigher machine is dependent on several factors, such as product characteristics, the accuracy required, weighs per minute required, clean-down and budget.

  • Product type and characteristics – Linear weighers are ideal for smaller products that are consistent in shape and size, while multi-head weigher machines are better suited for products that vary in size, shape and density.
  • Production speed – Multi-head weigher machines can weigh and fill products at much higher speeds than linear weighers, which makes them much more suitable for high-volume production lines. However, this does depend on the product being weighed, as some products will be processed as quickly on either type of weigher machine.
  • Accuracy requirements – Multi-head weigher machines are generally more accurate than linear weighers, thanks to the combination of multiple load cells and the ability to adjust the combination of hoppers used to achieve the target weight.
  • Product changeover – Linear weigher machines can require more time for product changeover or adjustments, while multi-head weighers can store multiple products and switch between them quickly. However, the products being processed will also factor into the speed of product changeover, as multi-head weigher machines have more parts, which will take longer to strip and clean than linear weighers. Both types of weigher machines also have quick-release, no-tool parts, so that the overall time for the changeover is not that different. If time sensitivity is an issue, then an additional set of change parts can make changeover quicker and more efficient.
  • Budget considerations – Linear weighers are typically less expensive than multi-head weigher machines, which makes them a more cost-effective option for smaller production lines.

 

Autopack is pleased to offer advice for your decision-making process when choosing which type of weigher will best suit your production needs. Get in touch to consult with a member of our expert team today.

 

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Weighing Machine - FAQs

A weigher machine is a type of packaging equipment used to accurately weigh and dispense a predetermined quantity of product into packaging containers, such as bags, pouches or cartons. There are different types of weigher machines depending on the product being manufactured and packaged.

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