In six months, an Indonesian snack producer moved line rate from 45 packs/min to 58–62 packs/min, trimmed changeovers from 45–60 minutes to 18–25 minutes, and brought waste down from 6–8% to 3–4%. The turning point came when the team paired a **multihead weigher** with a synchronized vffs packaging machine and finally got the film registration and fill weights playing nicely together.
I was on the floor the week we switched the controls from standalone to integrated. The operators were skeptical—”we’ve tried automation before”—but the first batch of chili-flake sachets hit target weights with far fewer rejects than usual. Not perfect, not magic, just tighter process control, better data, and a calmer shift.
Here’s where it gets interesting: most of their flexible packaging was already preprinted via Flexographic Printing on PE/PP/PET Film with Food-Safe Ink, compliant with EU 1935/2004 and BRCGS PM. The printing looked fine; the pain lived in the fill and seal.
Company Overview and History
The customer, SunBite Foods, runs three flexible packaging lines in Central Java, serving regional retailers across Asia. Product mix ranges from chili flakes and dried shallot bits to micro-sachets of spice blends. Film is preprinted via Flexographic Printing with Low-Migration Ink; most jobs use laminated PE/PP/PET Film to handle seasoning oils and to keep odors from bleeding. They track GS1 codes and ISO/IEC 18004 (QR) for promos, so registration marks matter.
Historically, their powder line ran on a sachet filling machine, while the granule line relied on older scales feeding a vffs packaging machine. Changeovers were frequent—8–12 SKUs on a typical day—and every swap meant re-tuning fill parameters, sealing temps, and registration. The automatic food packaging machine did its part, but without tight weight control and synchronized timing, FPY drifted and operators chased anomalies.
They wanted better stability without a massive footprint change. The brief we heard was practical: keep operators comfortable, maintain compliance, and deliver a payback within 14–18 months. Nothing flashy—just a line that behaves when the SKU count spikes around holiday demand.
Quality and Consistency Issues
On audits, we saw three pain points. First, fill variability: granules bridged in hoppers during humid afternoons, causing underfills and occasional over-corrections. Second, registration drift: photo-eyes found marks, but film tension and seal jaw timing weren’t always in lockstep, especially when shifting between pouch sizes. Third, dust: a bit of seasoning dust triggered false rejects downstream. Baseline FPY sat around 86–89% on busy days.
We got the question more than once: “Why not just keep the sachet filling machine for everything?” Fair question. For fine powders, their existing setup stayed in place. For textured granules—chili flakes, crisp shallot bits—the **multihead weigher** delivers better weight control and gentler product handling. Different tools for different materials; the powder bagging machine still runs the curry mix line, but the granule SKUs needed a new playbook.
To ground this in data, we measured fill deviations across a week: target 12 g, with spreads of ±1.6–2.1 g in peak humidity. ppm defects rose with long runs, especially after two consecutive changeovers. ΔE on the printed film was within 1–2 most days, so print wasn’t the villain; process synchronization was.
Solution Design and Configuration
We configured a 14-head **multihead weigher** with stepped pans to handle fragile flakes without bruising. Contact parts were food-grade stainless, with a smooth finish to minimize cling. The scale tied into a servo-driven vffs packaging machine via a single control architecture—think one HMI, shared recipes, synchronized photo-eye inputs, and a common ‘start/stop’ logic. Essentially, an integrated automated packing machine that keeps timing tight.
On the film side, we added a tension feedback loop and upgraded mark detection. Seal jaws got temperature zoning for small sachets versus taller pouches, and we locked down the forming tube geometry. Operators can call up SKU recipes that set weigh target, vibration amplitude, jaw temps, and pull-down speed in one move. For traceability, we kept GS1 data embedded and added a lightweight camera check on date codes.
Was it smooth? Not entirely. Early runs saw the **multihead weigher** jogging the vffs feed while the bagger tried to hold mark; we had to tune delays to keep fill drops within the jaw’s open-closed window. Another hiccup: after a late-night clean, a pan wasn’t fully seated, causing erratic weights. We documented a pre-start checklist—simple, effective, and worth the five minutes it takes.
Quantitative Results and Metrics
Line rate moved from 45 packs/min to 58–62 packs/min once the **multihead weigher** and vffs packaging machine ran on shared recipes. Changeover time fell from 45–60 minutes to 18–25 minutes; operators attribute most of that to preset parameters and fewer test dumps. Waste dropped from 6–8% to 3–4% as false rejects eased. FPY rose into the 92–94% range, especially on the chili flake SKU. We saw kWh/pack go from ~0.018 to ~0.016–0.017 after stabilizing dwell times.
The powder lines stayed with their sachet filling machine and powder bagging machine setups; for granules, the integrated **multihead weigher** kept fill deviation near ±0.8–1.0 g on typical humidity days. To be candid, sub-10 g sachets still need careful jaw tuning, and afternoon humidity can add variability. A small dehumidifier near the weigh hopper brought ppm defects down by a few hundred in peak season.
Payback penciled at 14–18 months, helped by fewer reworks and less film scrap. Color stayed consistent—ΔE rarely crossed 2—thanks to stable mark tracking on the preprinted film. In practical terms, the team now spends more time pushing orders and less time firefighting. My take: simplicity in recipes and a single control stack did more for confidence than any spec sheet ever could.
