Packaging Line Solutions | Turnkey End-of-Line Systems

When a Single Machine Stops Being Enough — and a Line Pays for Itself

A packaging line links individual machines — case erecting, filling, sealing, strapping, shrink wrapping, palletizing — with conveyors so product flows from one station to the next without manual handling. The trigger for moving from single machines to a line is rarely one dramatic moment; it is the slow accumulation of labor cost, inconsistency, and the transfer-point bottlenecks between machines. As a rule of thumb, if you run two or more packaging machines and still have staff hand-carrying product between them, a line study will almost certainly pay for itself in 12–24 months.

SunAura designs and builds turnkey packaging lines end-to-end in our 48,000㎡ Qingdao factory — from case erectors to robot palletizing — for food, beverage, daily chemical, pharmaceutical, electronics, hardware and agricultural customers in 100+ countries. You get one supplier, one engineering responsibility, one service line: no finger-pointing between brands when something needs fixing.

Three Levels of Automation — Start Where the Math Works

Level 1 — Semi-automatic entry (500–2,000 units/day): case erector or manual erecting + semi-auto sealing + strapping + manual palletizing. Low capex, typically 1–2 operators per station, payback under 12 months against a 3–4 person hand-packaging crew.

Level 2 — Medium automation (2,000–8,000 units/day): automatic erecting, automatic sealing, strapping and shrink wrapping with conveyor linking, 1–2 supervisors running the whole line. This is where most food and e-commerce operations land.

Level 3 — Fully automatic turnkey (8,000+ units/day): adds auto filling, continuous-motion wrapping, and robot palletizing at the end. Headcount drops to line supervision + QC; output is limited by the upstream production line, not packaging.

Do not overshoot. A fully automatic line that runs one shift uses its automation only a third of the day — the extra capex rarely pays back. We will tell you honestly which level fits your volume; that is part of the free design study.

Typical Line Architectures We Build

Carton end-of-line: case erector → filling/packing station → carton sealer (standard or corner) → strapping (optional) → pallet wrapper → label. The most common architecture; scales from Level 1 to 3.

Liquid bottle line: bottle feeding/orienting → filling (piston/servo/vacuum) → capping → labeling → shrink multipacking → carton packing. SunAura’s filling-capping-labeling lines cover edible oil, sauces, honey, beverages and pharma.

Shrink / multipack line: product infeed → L-bar sealing → shrink tunnel → carton packing or direct palletizing. For beverage multipacks, cosmetics kits and consumer goods.

Vacuum food line: vacuum packing (single or double chamber, matched to throughput) → drying/inspection → carton packing. Often combined with shrink wrapping for retail packs.

Layout: Where Lines Succeed and Where They Fail

Our 2026 failure-case study of packaging line layouts found the same four mistakes across industries: (1) conveyor height mismatches between machines from different suppliers, (2) transfer bottlenecks where cartons must be moved by hand, (3) no buffer zones — one machine’s downtime stops the whole line, and (4) underestimating maintenance access, leaving no room to service the sealing head or vacuum pump.

A good line design solves all four before any steel is cut: matched conveyor heights, auto transfers with minimal manual steps, 3–5 minutes of buffer between stations, and service aisles on every machine. Send us your floor plan (even a hand sketch with dimensions) and we design around it.

Our 5-Step Delivery Process

1. Data collection: product type, sizes, daily output, shift pattern, floor plan, existing equipment. 2. Line design: our engineers produce a 3D line layout with equipment list, speeds, manning and budget within about a week. 3. Build & test: every machine built in-house, then the assembled line runs continuously for 48 hours at rated speed with your samples. 4. Installation: overseas engineers available for on-site installation and commissioning; every line ships with remote video guidance. 5. Lifecycle support: 12-month warranty, spare parts within 48 hours, lifetime remote support.

Budgeting and Payback Reality

Use the three levels as your budget skeleton: L1 lines start in the low five figures, L2 typically runs mid-five to low-six, and L3 lines are quoted individually after the design study. The payback math that matters is labor saved minus automation cost per month — most of our line customers cross into positive cash flow inside 12–24 months at the volumes shown above, and the design study gives you the exact number before you commit a single dollar. Why SunAura as your line partner: because we manufacture nearly every machine on the line ourselves, we control speed matching, conveyor heights, PLC integration and spare-part availability — the three things that kill multi-supplier lines. We are CE and ISO 9001 certified (SGS-audited), hold 20+ patents, and have delivered custom lines to 100+ countries.