A complete packaging line is more than four machines on a table. It is a coordinated system where filling rate, capping speed, labeling throughput, and case packing capacity must match — or the slowest machine becomes a bottleneck and the fastest machine idles.
This guide walks through the planning steps for your first line.
Step 1: Define Your Bottle and Product
Before talking to any factory, lock down:
- Product: viscosity, fill weight, whether it foams, whether it contains particles
- Container: material (PET, glass, HDPE), neck finish (e.g. 28mm PCO, 38mm GPI), height, diameter
- Cap: type (screw, snap, ROPP), diameter, liner material
- Label: type (self-adhesive, shrink sleeve), size, roll specs
- Target speed: bottles per minute (BPM) — be realistic
Step 2: Choose a Common Speed Rating
Every machine in the line must handle your target speed — with headroom. If you need 40 BPM:
| Machine | Minimum rating | Recommended rating |
|---|---|---|
| Filling machine | 40 BPM | 60 BPM (1.5× headroom) |
| Capping machine | 40 BPM | 60 BPM |
| Labeling machine | 40 BPM | 50 BPM |
| Case packer | ~3 cases/min (12 bottles/case) | 5 cases/min |
Why headroom matters: real-world speed is always lower than machine rating. Changeover time, jam clearing, product refill, and label roll changes all eat throughput. A machine rated at 60 BPM running 40 BPM has margin for these realities.
Step 3: Match Conveyor Heights
This is where most DIY lines fail. Conveyor height mismatch causes bottles to tip, jam, or fall between machines.
Standard approach:
- All machines share a common conveyor height (typically 850–900mm from floor to conveyor top)
- Each machine’s infeed and outfeed height must match the connecting conveyor
- Specify the conveyor height in every purchase order — do not assume factories use the same default
If heights differ, you need transition pieces (ramps, bridges) which add cost and create jam points. It is far cheaper to specify matching heights from the start.
Step 4: Choose Synchronized or Standalone Control
Standalone mode: each machine runs independently with its own conveyor. Operators transfer bottles between machines manually or via short connecting conveyors. Simple, flexible, and suitable for small batches (<30 BPM).
Synchronized mode: machines are linked by a main conveyor with a PLC that coordinates speed. When one machine stops, upstream machines pause (via sensor or conveyor backpressure). Required for >30 BPM to avoid bottle pileup. Adds cost but eliminates operator bottlenecks.
Key specification: the conveyor speed and accumulation logic must be programmed together. If you buy machines from different factories, confirm that their PLC protocols are compatible — or budget for a system integrator.
Step 5: Plan for Changeover
If you run multiple SKUs (different bottle sizes, products, or labels), changeover time matters:
| Machine | Typical changeover | What changes |
|---|---|---|
| Filler | 15–30 min | Nozzle pitch, fill volume, conveyor guides |
| Capper | 10–20 min | Chuck/disc spacing, torque setting |
| Labeler | 10–30 min | Guide rails, star wheel, label roll |
| Case packer | 20–45 min | Case size, collation pattern, tooling |
Reduce changeover by:
- Choosing machines with quick-release tooling and digital position indicators
- Standardizing bottle neck finishes across SKUs (one capping setup)
- Pre-programming recipes in the PLC (fill volume, torque, label length per SKU)
Step 6: Budget the Full Line
A common mistake is pricing only the core machines and forgetting accessories:
| Item | Typical cost |
|---|---|
| Filling machine (auto inline, 4–6 nozzles) | $5,000–$15,000 |
| Capping machine (auto inline spindle) | $2,000–$8,000 |
| Labeling machine (round bottle, auto) | $2,000–$8,000 |
| Case packer (semi-auto) | $5,000–$15,000 |
| Connecting conveyors (stainless) | $1,000–$5,000 |
| Air compressor (if needed) | $500–$2,000 |
| Spare parts kit (seals, belts, nozzles) | $500–$2,000 |
| Shipping (FOB to your port + inland) | $3,000–$8,000 |
| Installation & commissioning | $1,000–$5,000 |
| Total | $20,000–$60,000 |
Step 7: Choose Between Single-Factory and Multi-Factory
Single factory (turnkey): one supplier provides all machines plus integration. Simpler project management, guaranteed compatibility, one point of contact. Cost premium: 10–20%.
Multi-factory: buy each machine from its specialist. Lower per-machine cost (factories compete on their core product), but you own the integration risk — conveyor matching, PLC compatibility, and warranty boundaries.
For a first line, choose a single factory from our Full-Line Suppliers directory — 550+ verified manufacturers that cover 2+ machine categories and can deliver integrated lines.
Final Tip: Test Before You Ship
Before the machines leave China, run a complete line test with your actual bottles, caps, and labels. Request a video showing 50–100 bottles going through fill → cap → label → case. This single step catches 90% of integration issues — before they cost you weeks of on-site debugging.