Factory Acceptance Checks for a Vertical Form Fill Seal Machine
Buyers should define measurable pass or fail checks for bag dimensions, film handling, and sealing before signing off a vertical form fill seal machine at the factory.
Before signing off a vertical form fill seal machine, decide which checks must pass at the factory rather than after installation. A practical starting point is bag geometry: ask the supplier to run the full bag length range of 80–400 mm and bag width range of 200–295 mm, and record measured dimensions against agreed tolerances. Confirm which film widths within 420–620 mm will be demonstrated, since the film used at the test should match your production packaging film.
Build the acceptance test around repeatable samples. How many bags per setting will be measured, and who records the results? Will seal integrity be checked by a method you agree in advance, and what constitutes a failure? Ask for a run at the slowest and fastest intended speeds, with notes on any adjustments made during the test.
Before requesting a quote, confirm with the supplier which bag sizes and film widths the test will cover, what measurement method and tolerances apply, how many samples are required, and whether the factory test uses film representative of your own. Treat catalog ranges such as 80–400 mm bag length as reference values only and verify the supplied model's actual capability.