Packaging Systems

Three routes: product, packaging material and dosing

Roll-film VFFS — Product: assess discrete pieces such as nuts, chips or frozen food. Material: roll film formed into a bag. Dosing: review the multihead weighing configuration with the actual product. Inputs: product condition, bag drawing, fill quantity and accepted output.

Multi-lane stick pack — Product: assess each powder formula separately. Material: roll film divided into parallel sticks. Dosing: review the auger tooling for the formula and dose. Inputs: powder sample, density information, dose and complete web drawing.

Premade pouch — Product: specify the solid or liquid and the required filling arrangement. Material: finished pouches. Dosing: confirm the filler for that material rather than inferring it from pouch shape. Inputs: actual pouch, usable opening, fill quantity and material condition.

These are text process comparisons; workshop photographs illustrate equipment families, not validated process flows. Takeaway: Carry one product-and-package brief into the selected system discussion.

Common mistake: Reading a workshop photograph as a process-flow diagram for the roll-film, stick-pack or premade-pouch route.

• Roll-film VFFS — follow forming, filling and sealing
• Multi-lane stick pack — review parallel film and powder paths
• Premade pouch — check opening, filling and closure

Decide who makes the package

The first decision is whether the machine makes the package or receives it ready-made. Brand and speed come later. 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. Compare film and pouch quotations for the same finished-pack specification and order basis; this page does not establish a material-cost advantage. The roll-film 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.

Takeaway: Choose the packaging-material route before comparing machine rates.

Common mistake: Assuming roll film is cheaper without comparing equivalent pack specifications and order quantities.

• Vertical form fill seal — how roll film is formed, filled and sealed
• Premade pouch — how a finished pouch is opened, filled and closed
• Multi-lane stick pack — how one web becomes parallel sticks
• VFFS or premade pouches — compare the two material routes

Pick the dosing principle from the product

You choose the filler by how the product moves, whatever 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, not 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.

Takeaway: Send the material in its expected filling condition, with the dose requirement.

Common mistake: Picking a multihead weigher, auger or piston from the product name before describing how the product moves, the dose and the variation you can accept.

• Multihead weigher VFFS systems
• Auger-dosing stick-pack systems
• Piston-filling sachet systems
• Multihead weighing or auger dosing? — match the filler to product movement
• Multihead weigher VFFS synchronization — timing hopper and dosing handshake guide

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. Add 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. A competitor listing them is no reason to ask.

An option on the machine does not give you 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 talk. The valve changes the pack and how it is supplied.

Takeaway: Specify the package result and how it will be assessed before adding gas or vacuum.

• Nitrogen-flushing VFFS systems
• Vacuum VFFS systems
• Nitrogen flushing checklist
• Coffee valve bags

Size the system from accepted packs, not the cycle rate

A brochure speed is 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 target weight can need very different bag lengths, hopper volumes and forming tube sizes for chips and for nuts, and an undersized bag needs a filling-clearance and seal review. Send our engineering team the net weight range and a density measurement from production material, then compare proposals by the output they commit to under those conditions.

Takeaway: Compare accepted output for the same product, bag and working schedule.

• Set a packaging output target
• Fill weight and bulk density
• Bag size and film width

Check what the surrounding line must include

A 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, not one component. Mark which conveyors, checkweighers or coders you already own. Then ask each supplier to state which interfaces they are responsible for.

Takeaway: Mark existing equipment and assign responsibility at every handoff.

• Packaging line layout checklist
• Packing machine utilities checklist
• Packaging line layout review
• Vertical form fill seal — assign feed, bagger and discharge scope
• Premade pouch — review the pouch magazine and opening
• Multi-lane stick pack — review powder refill for parallel lanes

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.

A decision is only as good as its trial. 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.

Takeaway: Keep sample identity and open requirements with the quotation.

• Prepare a packaging machine brief
• Browse machine configurations
• Sample testing planning

Method and scope of this selection guide

Keep the selected bag construction, product sample and filling route together in the configuration record. Our engineering team uses the pack drawing, film specification and required output to review the forming, dosing, sealing and discharge arrangement. Record the agreed scope in the quotation and retain the sample reference for the subsequent trial and acceptance checks.

Takeaway: Mark undecided fields as open rather than substituting assumed values.