Vertical Form Fill Seal Systems
How vertical form fill seal systems make bags from roll film, dose and seal each pack, and how to choose the filler, bag format and surrounding line.
Packaging Systems
Start with your product and packaging format. Explore the configurations and information needed to plan your line.
Multi-Lane Stick-Pack Systems
Package single-serve coffee, creamer and supplement powders in parallel lanes with auger dosing and vertical stick-pack forming.
Premade-Pouch Packaging Systems
Fill and seal ready-made pouches with product-specific weighing or liquid dosing and automatic pouch handling.
Multihead Weigher VFFS Systems
Define the complete path from bulk product to a weighed, formed and sealed bag, including the equipment that joins each stage.
Auger-Dosing Stick-Pack Systems
Review powder dosing, replenishment and lane coordination for a four-lane single-serve stick-pack configuration.
Piston-Filling Sachet Systems
Plan piston filling for sauce sachets around viscosity, temperature, particles and portion size, and test dosing and four-side sealing as one trial.
Nitrogen-Flushing VFFS Systems
Define the gas-flushing option and its trial conditions without confusing machine configuration with a shelf-life guarantee.
Vacuum VFFS Systems
Review forming, filling, extraction and sealing as a coordinated packaging sequence for the desired vacuum pack.
How to choose a packaging system type
Work from the finished package and the way your product behaves to a system type, then add only the options and line equipment the pack actually needs.
Decide who makes the package
The first split is not between brands or speeds. It is between systems that make the package on the machine and systems that receive it ready-made. A vertical form fill seal system pulls printed film from a roll, forms it around a tube, fills it and seals it. A premade-pouch system picks up a pouch that a converter has already made, opens it, fills it and closes the top. A multi-lane stick-pack system also works from roll film, but slits a wide web into several narrow packs that run side by side.
This choice decides what you buy every month. Roll film is often the cheaper packaging material per pack, but the machine has to create the bag shape. Premade pouches move zippers, spouts and shaped bottoms to the pouch supplier, and the machine has to handle pouches that vary from lot to lot. If you are unsure, compare both routes with the same product and the same finished-pack sample before narrowing the shortlist.
Pick the dosing principle from the product
The filler is chosen by how the product moves, not by what it is called. Discrete pieces such as nuts, chips, candy and frozen dumplings are usually weighed by a multihead combination weigher, which picks a combination of partial weights close to the target. Fine and aerated powders such as coffee mixes, creamer and collagen are usually dosed by volume with an auger screw. Viscous sauces are metered by a piston through a nozzle.
Borderline products need a trial rather than a debate. Granules that flow like a powder, sticky dried fruit and sauces with particles can each suit more than one route, and the right answer depends on the dose size, the variation you can accept and how the product behaves after an hour on the line. Describe temperature, particle size, stickiness and fragility in the enquiry, and send the material as it will arrive at the machine.
Add gas or vacuum only for a stated package result
Nitrogen flushing and vacuum stages are options added to a base system. Each one adds a supply, a sequence step and something that has to be measured. Ask for them when you can state the package result you need: a cushioned snack bag with reduced oxygen in the headspace, or a tight pack around dried fruit. Do not ask for them because a competitor lists them.
A machine option does not establish a shelf life. The gas result depends on the film, the seal quality, the bag volume and how the packs are sampled after the run. Before accepting the option, agree how the residual gas or pack firmness will be measured, on how many packs and at what point after sealing. Coffee valves belong in the same discussion, because the valve changes the pack and how it is supplied.
Size the system from accepted packs, not the cycle rate
A brochure speed describes a machine cycle under stated conditions. Your purchase needs a figure for accepted packs per shift with your product, your bag and your mix of jobs. Start from the orders you must fill, subtract planned stops for film changes, cleaning and changeovers, and work out the rate the line has to hold while it runs.
Fill weight and bulk density matter here. The same 500 g target can need very different bag lengths, hopper volumes and forming tube sizes for chips and for nuts, and a bag that is too tight will slow the line and increase seal rejects. Give the supplier the net weight range and a density measurement from production material, then compare proposals by the output they commit to under those conditions.
Check what the surrounding line must include
A packing machine alone rarely makes a working line. Discrete-product systems usually need a feed elevator, a platform with access stairs for the weigher, and a discharge conveyor. Powder systems need a refill method that keeps the auger hopper at a steady level. Premade-pouch systems need a pouch magazine that operators can reload without stopping the line too often.
Measure the ceiling height at the installation point, because a multihead weigher on a platform above a bagger is a tall assembly. Confirm the power supply, compressed air quality and any nitrogen supply for the complete quoted line rather than one component. Mark which conveyors, checkweighers or coders you already own, and ask each supplier to state which interfaces they are responsible for.
Shortlist a system and test it with your material
Narrow the choice to one or two system types, then write a brief that a supplier can answer in the same format: product, target weight or volume, bag style and dimensions, required output, utilities and destination country. Attach photos of the product and a finished pack. The machine pages on this site list the published configurations for each family, with parameter tables that describe listed configurations rather than guaranteed results.
The decision is only as good as the trial behind it. Send representative samples, agree which results matter before the run, and keep the report with the quotation. When the system type is settled, the individual system pages below explain the checks that belong to each one.