Technical selection guidance
Confirm the LU-SPL6 configuration, film route and sustained duty
The LU-SPL6 page describes an automatic film-wrapping and tunnel-shrinking route with published speed, belt, film and tunnel data. Those figures support initial comparison, but the final machine configuration and accepted performance must be tied to the actual product and film.
Qualification should include dimensional fit, stable infeed, seal or film closure, heat exposure, cooling and downstream handling. A maximum-rate empty cycle is not an acceptance test.
Check the dimensional relationships on the real orientation
The published page states W + H ≤ 700 mm, L + H ≤ 800 mm and H ≤ 150 mm in the wider machine reference, with a 600 mm conveyor belt. Confirm how length, width and height are defined for the intended orientation and include loose film before shrink.
Products with handles, projections or unstable bases need a transfer and guide review even when the nominal dimensions fit the stated relationship.
Prove the listed 15–30 bags/min range
The page lists 15–30 bags per minute. Actual accepted output depends on product pitch, film feed, seal cycle, tunnel dwell, cooling and downstream clearance. The trial should state the pack, film and duration used to demonstrate any agreed rate.
Automatic lines should also be tested for start-up, gap changes and the response to a skewed or missing product so that quality is not based only on uninterrupted ideal feed.
Select POF or PE from the required pack
POF and PE are listed as applicable shrink films, but they normally support different pack and sealing objectives. Use the required enclosure, presentation, bundle strength and handling route to choose the film and wrapper configuration.
Supply the exact gauge, width, shrink curve and reel dimensions. The listed 60% shrinkage ratio should not be treated as a guaranteed finished-pack result; actual contraction is governed by the production film and process conditions.
Establish the tunnel and cooling recipe
The published tunnel reference is 1800 × 750 × 400 mm. Check wrapped-product clearance and use temperature, airflow and conveyor speed together to create a stable dwell-time window.
Test under sustained loading, then allow the film to cool before assessing final tension or bundle strength. Downstream conveyors must avoid snagging or compressing the warm wrap.
Integrate compressed air and controls
The wider published reference lists a 0.5 MPa air supply. Confirm pressure, flow, air quality, isolation and connection at the destination site for the final supplied configuration.
Agree conveyor heights, line direction, upstream spacing, guarding, emergency-stop interfaces and downstream accumulation. The wrapper cannot deliver its intended output if product presentation is inconsistent.
Technical questions buyers ask
Is the LU-SPL6 an L-sealer for every product?
The page presents an automatic wrapping and heat-tunnel route. Suitability depends on the supplied configuration, product, film enclosure and required seal. Confirm the exact application rather than relying on a category label.
Can POF and PE use the same settings?
No assumption should be made. They can require different film handling, sealing and tunnel windows. Create and control a separate approved recipe for each film and pack.
Does the 60% shrinkage ratio define the finished size?
No. It is a listed reference. Actual shrink depends on the film construction, orientation, temperature, dwell, airflow and how the film is restrained by the product.
How should the 15–30 bags/min output be tested?
Use the agreed product and production film, define the accepted pack standard, run after the tunnel reaches stable load and record the number of consecutive accepted packs.
What utilities should be confirmed?
Confirm the electrical supply shown in the final quotation, compressed-air pressure/flow and quality where required, ventilation, line interfaces and safe maintenance access.
What information prevents a poor line interface?
Provide upstream conveyor speed and product pitch, line height/direction, accumulation, product stability, downstream cooling and the required controls response to gaps or faults.
