Technical selection guidance
Qualify the LU-SPL4 as a complete bottle-multipack process
The LU-SPL4 combines bottle grouping, film wrapping and tunnel shrinking. Its published ranges provide a useful starting point, but the critical result is a stable multipack made from the intended filled bottles and PE film at the agreed sustained duty.
The wrapper, tunnel and cooling conveyor should be reviewed as one system. A change to bottle geometry, pack pattern or film can alter collation, seal position and shrink force.
Confirm every bottle and pack pattern
The published bottle range is 60–120 mm diameter and 100–330 mm high, with a maximum package reference of 400 × 120 × 330 mm. List every container and group pattern, including the minimum pack reference used on the page, and check the actual outline at labels, shoulders and caps.
Filled bottles should be used because weight, centre of gravity and surface condition affect collation and transfer. Include the least stable format and any tray or pad.
Treat 0–6 packs/min as an application result
The listed output is 0–6 packs per minute. The sustainable rate depends on bottle infeed, group formation, film feed, sealing, transfer, tunnel dwell and cooling. It should be demonstrated on the required pack pattern, not inferred from an empty cycle.
Define the test duration and number of consecutive accepted packs. Include start/stop recovery and a missing or misaligned bottle response if the line is automatic.
Qualify the PE film reel
The page lists PE shrink film, a maximum film width of 560 mm and film thickness between 0.03 and 0.25 mm in the wider published reference. Supply the exact production reel, including width, gauge, shrink curve, core, outside diameter and print information.
Film size and seal position should create a stable bundle without excessive side fins or pulling bottles out of alignment. Printed film needs production-equivalent registration and orientation during the trial.
Check payload and conveyor support
The published payload capacity is up to 20 kg. Confirm the complete bundle weight, footprint and load distribution, plus the transfer into and out of the wrapper and tunnel.
A pack below the stated payload can still be unsuitable if it is unstable, point-loaded or unable to bridge a transfer. Cooling support is particularly important before a warm PE bundle is lifted or accumulated.
Define the approved bundle test
Agree film tension, seal position, side opening, bottle alignment and acceptable cosmetic appearance. Add a handling test that reflects how the bundle will be lifted, conveyed, stacked or placed into secondary packaging.
Record bottle and film codes, pack pattern, speed, tunnel recipe and cooling condition for the approved sample. This allows future film or container changes to be reviewed against a controlled baseline.
Technical questions buyers ask
Can the LU-SPL4 create different bottle group patterns?
Patterns can be assessed within the machine and pack envelope, but every arrangement needs defined collation, film coverage, guides and an accepted trial.
Does the 20 kg payload apply to any pack shape?
No. It is a published capacity reference. Weight distribution, product stability, footprint and conveyor transfers must also be suitable.
Can printed PE film be used?
It can be considered where reel presentation, print repeat, registration, film construction and machine configuration are compatible. Use a production-equivalent printed reel for testing.
Why can bottles lean after the tunnel?
Investigate group formation, guide position, conveyor transfers, asymmetric film pull, airflow and cooling support. The bundle should remain supported until the film has set.
What is needed to confirm the output?
Define one or more pack patterns, filled bottles, target sustained rate, film, acceptable pack quality and a test duration under representative tunnel loading.
What changes require a new trial?
Material changes to bottle geometry, cap, label, fill condition, pack pattern, tray or pad, film supplier/gauge or the required handling test should be reviewed and requalified as appropriate.
