A flexible packaging equipment supplier for complete production lines China has one question to settle before the equipment list: what sheet does the line have to run? The XPM-1080RN hot knife laminating machine is built around that answer, from 350 × 270 mm at the small end to 1080 × 1500 mm at the large end.
Most lines are specified the other way round. A buyer lists the stages, compares three quotations and picks the cheapest set, then discovers at commissioning that one stage cannot take the format the order actually carries. The fix is a new knife, a new film width or a second machine, and none of the three is in the original budget.
Four dimensions decide the configuration before any quotation is written: width, length, grammage and sheets per hour. Each one lands on a different part of the line, and each one has a hard limit that shows up in the specification sheet rather than in the brochure.
THE SHEET SIZE COMES FIRST
The largest sheet is 1080 × 1500 mm and the smallest is 350 × 270 mm. That is a wide envelope for one machine, and it is the envelope the rest of the line has to respect. A feeder sized for the large format runs the small one at a fraction of its rate, and a stacker set for the small pile has to be readjusted for every job above it.
A buyer who sizes the line on the maximum alone pays for capacity that sits idle on short runs. A buyer who sizes it on the minimum cannot take the carton that pays for the investment. The hot knife film laminating machine is offered in three widths for this reason, and the width is chosen against the sheet, not against the floor space.
WIDTH: 1080, 1280 OR 1480 MM
The machine comes in three widths, 1080, 1280 and 1480 mm, and the film unwinding follows the width that is ordered. The film roll sits on an air shaft with an automatic tension controller, and the roll can be shifted left or right to line up with the sheet. Waste film rewinding is movable as well, so the trimmed edge can be pulled back to the width the sheet actually uses.
The arithmetic is simple and often skipped. A 1080 mm sheet on a 1480 mm machine leaves 400 mm of film unused on every impression, and that film is bought by the kilogram. A 1280 mm film roll on a 1080 mm job has to be trimmed and rewound, which adds an edge and a waste stream. The width decision is a film decision before it is a machine decision.
LENGTH: WHAT THE HOT KNIFE HAS TO CROSS
Length runs from 1000 to 1700 mm in five steps, and the knife crosses the full sheet on every cycle. The cutting head uses two servo axes, and the blade is heat treated at 600 °C so the edge holds its shape through a shift. A sensor reads the sheet position, and the knife follows it rather than a fixed timer.
Knife geometry matters more than most buyers expect, because the edge it leaves decides whether the next stage can stack the sheet. Cutting geometry is studied in slitting for the same reason: a blade that pushes rather than shears leaves a burr, and a burr becomes a doubled sheet in the pile.
When the same job runs as roll-to-roll film instead of sheets, the line changes shape rather than size. A solventless laminating machine takes the film in web form, and the knife is replaced by a rewinder.
GRAMMAGE: 80 TO 500 GSM ON ONE LINE
The disc cutter covers 80 to 500 gsm, which is thin paper at one end and folding carton board at the other. The two ends behave differently in the same machine. At 80 gsm the sheet curls after the heated roll and the pile refuses to sit flat, which is why an anti-curvature device sits before the delivery. At 500 gsm the same cutter is working at the top of its range, which is why the thickness row names the cutter beside the number.
Film choice sits on top of the paper choice. PET, PVC, BOPP, CCP, metallized film and soft touch film all run on this machine, and each one brings its own adhesive behaviour. The machine applies heat and pressure, and it does not change whether an adhesive suits a substrate. Choosing between extrusion coating and adhesive lamination is a decision about the structure, and it is made before the machine is chosen.
SHEETS PER HOUR IS THE LINE FIGURE
The feeder takes around 15,000 sheets per hour, and it runs non-stop with a pre-stack guide so the pile can be reloaded without stopping the machine. Sheets per hour is the figure a flexible packaging equipment supplier for complete production lines China has to quote, because it is the one number a buyer can compare across two lines. The machine speed is 105 m/min, while working speed with the disc cutter sits at 80 to 100 m/min. The gap between the two numbers is the part buyers forget to ask about.
Glue consumption is 2 to 4 g/m², applied by two metal rolls, and the quantity is adjustable to match the material and the running speed. Coating profile control decides whether that 2 g/m² lands evenly across the width or only in the middle.
Drying is the stage that sets the real ceiling. The drying roll is 800 mm in diameter with a Teflon coating, heated by an electromagnetic heater plus an oil heater, and the surface reaches 180 °C. Drying and heating are not the same thing: one removes solvent, the other raises the web temperature, and a line that confuses them runs fast and bonds badly.
Upstream, the printed sheet has to arrive at the rate the laminator can take. A CI flexo press that prints slower than the laminator feeds becomes the constraint, and the line runs at the press speed with the laminator waiting.
THE FOUR DIMENSIONS IN ONE TABLE
Seven ratings carry the envelope. They are the numbers to put beside a quotation, because they can be checked without a site visit.
| Item | Value |
|---|---|
| Max. sheet size | 1080 × 1500 mm |
| Min. sheet size | 350 × 270 mm |
| Paper thickness | 80 to 500 gsm, disc cutter |
| Working speed | 80 to 100 m/min |
| Installed power | 85 kW |
| Machine size | 12,000 × 3,100 × 3,100 mm |
| Weight | 11,500 kg |
Two rows carry more weight than the rest. The 85 kW is installed power, while production draws 30 to 35 kW, so the electrical supply is sized on the first number and the running cost on the second. The 11,500 kg is the floor load to check before the machine is placed, and it is the number a structural engineer asks for first.
WHAT CHANGES WHEN THE FORMAT CHANGES
A format change touches the feeder, the knife, the film width and the stacker in that order. The feeder is non-stop with a pre-stack guide. The film roll is lifted hydraulically and shifted on its air shaft, and the stacker takes a pile up to 1,260 mm with side and front tidy devices. The overlap between sheets is held within 2 mm by a servo system.
That 2 mm is what makes the pile usable downstream. A larger error turns the stack into a wedge, and the next stage has to slow down to pull single sheets. Faster changeover is mostly a matter of preparing the next job while the current one runs, which is the same argument made for automated changeovers on other converting machines.
One operator runs the machine. That is the design target behind the hydraulic lifting, the touch screen and the stacker screen that shows running speed and completed sheets.
WHAT THE SUPPLIER HAS TO PROVE
Four samples settle more than a specification sheet: the largest format, the smallest, the thinnest paper and the heaviest board. Each one is run on the buyer's own stock, and each one is measured for cut edge, curl and pile quality. A supplier who will not run the small format has not understood what the line is for.
When the job is roll-to-roll film, the downstream stage is a slitting machine rather than a stacker, and the format question becomes a web width question.
Wenzhou Xiaopai Electric Power Technology Co., Ltd. supplies the line from Wenzhou, Zhejiang, with the laminating stage, the printing stage and the film stages configured against the sheet the buyer actually runs.
A complete line is not a list of stages. It is one sheet size carried through every stage without a re-tool at the end, and the quotation is only as good as the smallest format it can run.
