Dutch Yogurt Lid Converter Cuts Die-Cutting Scrap by 21% after Moving to a CC450-S Servo Line
Dutch Yogurt Lid Converter Cuts Die-Cutting Scrap by 21% after Moving to a CC450-S Servo Line
Case Background: Three Presses, One Persistent Problem
A foil lid converter in the northern Netherlands supplies pre-printed lids to four dairy brands, two of which ship private-label yogurt across the Benelux region. The plant operated three mechanical die cutters of different vintages, the newest from 2011, and treated the trio as one capacity block: whichever press was free took the next job.
The arrangement worked until a customer consolidated to a 68 mm lid with a 0.35 mm print-to-cut register requirement. Because each press had its own registration behaviour, the same job ran differently depending on which machine it landed on, and the resulting scrap spread between 4.6% and 7.1%. Averaged across the plant, foil waste reached 5.8% of consumption on roughly 46 tonnes of 40 μm foil per month.
First Finding: The Problem Was Consistency, Not Capability
The plant assumed its oldest press was the culprit. A four-week measurement using the same job on all three machines showed something more useful: the newest press was not significantly better at the end of a roll, and all three lost register as the unwinding diameter fell below about 300 mm.
Because the plant could not predict which press a job would run on, it over-trimmed the print layout on every job to accommodate the worst machine. That decision alone accounted for an estimated 1.9 percentage points of the 5.8% scrap figure.
- Register drift — mechanical followers lagged behind tension changes as the roll shrank from 800 mm to the core.
- Machine-to-machine variation — three different registration behaviours, one common print layout.
- Over-trim — the layout carried a trim allowance sized for the worst press, not for the average.
- Handling damage — lids dropped into open bins picked up edge dents, rejected at the dairy's sealing station.
Why Consolidation Beat Replacement
The original plan was to replace the oldest press and keep the other two. The plant reversed that decision during evaluation of the CC450-S high-speed servo cup lid die cutting machine, for a reason that had nothing to do with speed.
At 420 strokes/min, one CC450-S covers the output of the two slower presses on the plant's actual order mix. Running one machine instead of three removes machine-to-machine variation entirely — every job sees the same registration system, the same feed profile and the same operating set points. The over-trim allowance could then be reduced to match a single, predictable behaviour.
| Criterion | Three mechanical presses (2011 and older) | One CC450-S |
|---|---|---|
| Maximum speed | 260–300 strokes/min | 420 strokes/min |
| Running accuracy | ±0.45 mm, drifting below 300 mm roll diameter | ±0.25 mm held across the full 800 mm unwinding range |
| Drive | Mechanical main shaft | Multi-axis full servo on industrial bus |
| Cutting mechanism | Slider crank | Five-link structure, force balanced |
| Registration | Mechanical follower, per machine | Photoelectric tracking with smart deviation correction |
| Substrate range | Foil 40–90 μm | Foil 35–150 μm, paper 60–250 g/㎡, film 10–300 μm |
| Collection | Open bin, manual sort | Vacuum adsorption anti-drop with automatic counting |
| Changeover | 50–65 min, mechanical | 18 min average, parameter recall |
Commissioning Configuration
| Web width | 520 mm maximum — all four brand layouts run on a 505 mm printed web |
| Unwinding diameter | 800 mm, matching existing foil roll supply |
| Embossing | Independent single servo unit for the two brands requiring an embossed logo |
| Footprint | 2500 × 1550 × 2050 mm, net weight 2350 kg |
| Certification | CE, ISO |
Results After Five Months
- Foil scrap 5.8% → 2.2%, a 21% reduction in absolute waste tonnage after allowing for higher output volume.
- Trim allowance reduced by 1.6 mm per side, releasing material that had previously been designed away to accommodate the worst press.
- Production speed set at 410 strokes/min for standard jobs, with 420 available for catch-up runs.
- Two presses sold, one retained for short-run specialty lids and as backup.
- Edge-dent rejections eliminated at two dairy customers after vacuum collection replaced open-bin handling.
- Changeover at 18 minutes, allowing daily mixed schedules instead of weekly campaign batching.
What Transfers to Other Converters
The useful lesson here is not "buy a faster machine" but "stop designing your print layout around your worst press." Where several presses run the same jobs, measure the spread before you buy: if the spread is wide, consolidation onto a single servo platform converts an invisible quality cost into a visible material saving. Confirm three things in writing during evaluation — running accuracy at maximum speed, accuracy at the end of an 800 mm roll rather than the start, and how finished lids are collected.
