Flow and handling
Particle size, dust, fragility, stickiness, static, density variation and whether the product bridges or surges.
Weigh filler specialists
VFFS weigh filling lines for roll-film bagging projects.
A connected route for projects where the machine must form the bag from roll film, dose the product by weight or auger, then seal and discharge the finished pack.
Machine route
VFFS weigh filling line for roll-film bagging.
VFFS routes are relevant when the line must form a bag from roll film, dose product and seal the finished pack. The practical shortlist depends on film, bag size, dosing method, coding, checkweighing and discharge handling.
- Roll-film bags for powders, granules, snacks and dry mixes.
- Combines product dosing with form-fill-seal packaging.
- Specify bag dimensions, film type, target output and downstream checks.
Best-fit applications
- Coffee, granules, powders, grains, snacks, pet food and free-flowing dry products.
- Projects where bag making, dosing, sealing, coding and discharge need one line layout.
- Buyers comparing standalone weigh filling against an integrated form-fill-seal route.
How this route should be specified
Start with the real product, not a catalogue category. Flow behaviour, target weight, acceptable tolerance, pack presentation and operator workflow determine whether this machine route is practical.
Use this route to compare a VFFS weigh filling line against your product, target weight, pack format, output target and line constraints. The links below also help you compare related machine and application options before asking for advice.
Comparison
Questions to answer before quoting.
These are the details that normally change the recommendation, model, controls, integration points and final line layout.
Format and closure
Pouch, bag, jar, tub, bottle, sachet or downstream feed, plus the sealing or closing method after filling.
Speed and accuracy
Target packs per minute, tolerance, operator involvement, cleaning frequency and future SKU changeovers.
FAQ
VFFS weigh filling line questions.
Useful quick answers before you send your product and pack details.
When should I choose VFFS rather than a standalone weigh filler?
Choose VFFS when you need the packaging machine to form bags from roll film, fill them and seal them in one integrated process.
Can VFFS run with a multihead or auger filler?
Yes. The dosing unit is selected around product behaviour, so a VFFS line may use a multihead weigher, linear weigher, auger filler or other feeder.
What details affect a VFFS quote?
Bag size, film material, seal type, product flow, target weight, coding, checkweighing, speed and available floor space all affect the line specification.
Send the product, target weight, pack format and output target.
That gives Lancing enough information to compare a linear weigher, multihead weigher, auger filler or integrated bagging line.
Verified VFFS reference
Lancing LU-GFKL420: figures tied to a defined product and bagging basis.
The following values come from a first-party Lancing reference specification. They should be used as a configuration example and confirmed against product samples, production film and the agreed acceptance test.
| Item | Verified reference | Acceptance condition |
|---|---|---|
| System | Automatic VFFS bagger with ten-head electronic weighing. | Product feed, weigher, former, film path, sealing and discharge must be run together. |
| Model | Lancing LU-GFKL420. | Final machine and options must match the quotation and approved layout. |
| Weighing range | 10–2500 g; quoted application 500 g to 1 kg. | Verify the smallest, normal and largest target with representative product. |
| Head count and hopper | Ten electronic scales; approximately 1.3 L per head. | Check piece size, bulk density, head utilisation and refill distribution. |
| Speed | 5–60 bags/minute. | Subject to product, bag size, film, sealing cycle and downstream handling. |
| Accuracy | Approximately ≤0.3–1 g. | Subject to product and target weight; confirm mean, standard deviation, minimum and maximum in a witnessed trial. |
| Bag and film basis | Approx. W100–200 mm × L230 mm standard; max. film width 420 mm; compatible heat-sealable films listed in the reference specification. | Final former, film, seal style, registration, jaw settings and finished bag must be approved. |
Control sequence
Synchronise weighing, forming, filling and sealing.
- Product available. Upstream feed maintains the agreed hopper operating range without overloading the distribution system.
- Bag ready. The bagger confirms film and jaw status and requests a dose only when the formed bag can receive it.
- Weigher discharge. The selected heads release product through a controlled drop path; the bagger waits for discharge complete.
- Settle and seal. Timing allows product tails to clear the jaw area before the seal cycle.
- Inspect and transfer. The finished bag is conveyed to coding, metal detection or checkweighing as specified, with reject and line-stop signals confirmed.
Full-line acceptance.
- Production product and representative normal variation.
- Approved film, print registration and final former.
- Consecutive net-weight distribution and reject record.
- Seal inspection and product-in-seal count.
- Sustained output at the finished-pack point.
- Fault recovery, low-product, film-end and downstream-stop behaviour.
- Cleaning, film change and recipe change observations.
For detailed film-forming and sealing ownership, use Form Fill & Seal.
Buyer questions
VFFS weighing and line-interface questions.
What does the verified LU-GFKL420 configuration include?
It is a fully automatic VFFS reference with ten electronic weighing heads, a 10–2500 g range, approximately 1.3 L per head and roll-film bag forming, filling and sealing. Final performance remains trial-dependent.
Why can the weigher be faster than the finished line?
Film draw, bag length, sealing dwell, coding, product drop, discharge and downstream handling can limit the overall cycle even when the weighing head is ready.
How is product-in-seal risk tested?
Run the intended product and film at the planned target, inspect consecutive seals, record contamination or trapped pieces and adjust discharge timing, drop path and bagger cycle.
Where should the checkweigher be installed?
Normally after the finished bag is sealed and stabilised, with sufficient spacing and a validated reject route. The exact position depends on the line and legal or QA control plan.
What is needed to quote the bag former?
Provide finished bag width and length, film width and structure, seal style, registration details, product bulk density, target weight and representative film where possible.