Buyers should compare automatic packaging machines by verified output, product compatibility, package accuracy, uptime, changeover time, component quality, safety compliance, maintenance access, spare-parts supply, and total operating cost. A machine rated at 100 packs per minute produces 6,000 packs per hour only at uninterrupted rated speed; at 85% effective production, output falls to 5,100. Buyers should test their own product and packaging material before shipment, record reject rates, confirm filling tolerances, and measure format-change time. Supplier support, documented acceptance criteria, and repeatable production matter more than brochure speed. Safety design should also reference recognized standards such as ISO 12100 and ISO 13849-1.
The first comparison should start with the product rather than the machine. A powder with poor flow, a fragile snack, a viscous sauce, and a 25 kg granular product require different feeding and dosing arrangements even when the finished bag looks similar. Buyers should document product density, temperature, moisture, particle size, viscosity where relevant, target fill weight, acceptable deviation, and expected hourly volume before requesting equipment.
Packaging material has the same level of influence. A supplier should test the actual film, pouch, tray, bottle, carton, or other container whenever possible because seal temperature, material thickness, friction, stiffness, static behavior, and print registration can change machine performance. A line producing 60 packs per minute completes about 28,800 packs during an 8-hour shift before downtime is considered, so even a 1% material-related reject rate represents 288 rejected packs per shift.
Rated speed therefore needs context. A nameplate figure of 120 packs per minute may be reached with one package size under controlled conditions, while normal production may run at 90 or 100 because the feeder, checkweigher, sealing dwell time, discharge conveyor, or downstream case packer limits the line.
A useful comparison separates availability, performance, and quality rather than relying on maximum speed. OEE uses those three elements; 90% availability, 95% performance, and 99% quality produce about 84.6% OEE, commonly rounded to 85%, although the benchmark should not be treated as a universal requirement for every factory.
A machine that runs at 100 packs per minute for five minutes says little about an 8-hour production shift. Ask for a continuous test long enough to expose feeding interruptions, film tracking problems, temperature recovery, seal variation, sensor faults, and product accumulation.
Accuracy should then be measured using numbers that can be written into the purchase specification. For a 500 g product, an average giveaway of 3 g equals 0.6% of nominal weight; across 2 million packs per year, that becomes 6,000 kg of additional product. The acceptable tolerance depends on the product, weighing technology, legal requirements, and process capability, but the supplier should provide repeatability data rather than descriptions such as “high precision.”
Reject performance needs the same treatment. Buyers can record 1,000 or more consecutive packages during a factory test and classify failures by underweight, overweight, poor seal, wrong cut position, damaged package, unreadable code, misapplied label, or feeding error. A 0.5% reject rate produces 5 rejected units in a 1,000-pack sample; whether that level is acceptable should be agreed before the equipment is shipped.
Mechanical and electrical construction becomes more important after the test is over. Buyers should identify the brands and model families used for PLCs, HMIs, servo motors, variable-frequency drives, sensors, pneumatic valves, bearings, relays, heaters, and safety components, then confirm that replacements can be sourced in the machine’s destination market.
Standardized components can reduce service delays compared with proprietary hardware available only through one supplier. When comparing a packaging machinery manufacturer with other suppliers, ask for the recommended 2-year spare-parts list, expected replacement intervals, stock status, and normal shipping time for parts that can stop production.
Maintenance access deserves a physical inspection rather than a line on a specification sheet. Technicians should be able to reach belts, cutters, sealing jaws, heaters, sensors, filters, lubrication points, motors, and electrical cabinets without removing large assemblies. If a 20-minute wear-part replacement requires 90 minutes of disassembly and adjustment, yearly maintenance time can rise quickly across dozens of interventions.
Changeover performance can have an equally large effect in factories running many SKUs. A plant making 6 product formats and changing format 4 times per shift loses 180 minutes when each change requires 45 minutes; reducing each change to 15 minutes returns 120 production minutes per shift. Recipe storage, servo adjustment, tool-free parts, calibrated scales, position indicators, and clearly identified format components can shorten restart time and reduce operator variation.
| Measurement | What buyers should request | Example acceptance point |
|---|---|---|
| Production rate | Stable packs/minute using actual material | 80 packs/min for 60 minutes |
| Quality | Accepted packs divided by total output | At least 99% during agreed test |
| Fill control | Average weight and variation | Defined for the actual product |
| Changeover | Last good pack to first stable good pack | 15–30 minutes where applicable |
| Utilities | Power and compressed-air requirement | Recorded at normal production speed |
| Downtime | Stops, duration, and cause | Logged throughout FAT |
Safety documentation should be reviewed before final acceptance. ISO 12100:2010 provides principles for machinery risk assessment and risk reduction and was confirmed as current in 2022, while ISO 13849-1:2023 covers the design and integration of safety-related control-system parts. IEC 60204-1:2016 covers electrical equipment of machines, including subjects such as protective bonding, overcurrent protection, emergency stop, control circuits, and technical documentation.
Buyers should check guard interlocks, emergency-stop locations, access to moving parts, hot surfaces, stored pneumatic energy, restart behavior after power loss, and the safety function used when a guard is opened. A CE mark, declaration, or compliance statement should not replace inspection of the machine’s actual safety design and documentation.
Cleaning requirements should be tested with the production team, especially for food, pharmaceutical, cosmetic, and other applications where product contact areas require frequent sanitation. Measure the time needed to empty the machine, remove contact parts, clean surfaces, inspect difficult areas, reassemble components, and return to stable production; a sanitation process reduced from 90 minutes to 45 minutes saves 45 minutes every cleaning cycle.
The same review should cover material waste during startup. If a vertical packaging machine needs 20 m of film after every roll replacement or format change before stable packs are produced, 10 such events consume 200 m before saleable output resumes. Buyers should ask whether automatic film tracking, registration control, stored parameters, splice detection, and easier web threading can reduce that waste.
Integration requirements should be specified before machine layout is approved. Conveyor height, footprint, access clearance, product direction, electrical supply, compressed-air pressure, extraction, Ethernet connections, upstream signals, downstream signals, checkweigher communication, coding equipment, metal detection, case packing, and palletizing interfaces can all affect commissioning.
A machine that reaches 100 packs per minute alone may produce much less when the downstream unit accepts only 75. Line acceptance should therefore include blocked and starved conditions, accumulation behavior, automatic restart, fault communication, and controlled stopping instead of testing each unit independently.
Operating cost should be compared over several years rather than through purchase price alone. Consider two machines priced at $90,000 and $110,000: a $20,000 difference may be recovered if the higher-priced unit removes one labor position, lowers film waste by 1%, reduces product giveaway, or saves several hours of downtime each month. The calculation should use the buyer’s labor rate, production volume, material price, energy cost, maintenance history, and planned operating hours.
Supplier service belongs in the same calculation. Ask who answers technical questions, whether remote access is available, how many service technicians cover the destination region, what warranty exclusions apply, and whether PLC backups, electrical drawings, mechanical drawings, parts lists, maintenance schedules, and operating manuals are supplied. A response target of 4 hours is more useful in a contract than “fast support.”
Before shipment, the factory acceptance test should convert the commercial promise into measurable conditions. A practical FAT can run the buyer’s product for 60–120 minutes per format, record every stop, inspect a defined sample such as 1,000 consecutive packs, verify alarms and guards, measure changeover time, and compare final output with the agreed specification.
Acceptance records should include speed, good-pack percentage, weight data, seal condition, coding quality, utility use, downtime causes, and unresolved items. When those figures are agreed before the purchase order is signed, buyers can compare machines on production evidence, maintenance requirements, safety documentation, operating cost, and service capability rather than relying on a demonstration prepared around favorable conditions.