Setting up a cartoning machine for a new product size
Running a packaging line in Australia means balancing tight TGA expectations, lean local labour pools and the kind of practical, no-fuss attitude that characterises manufacturing from Sydney's outer suburbs to industrial estates in Melbourne's west. When a new product size lands on the schedule, the cartoning machine becomes the bottleneck unless the changeover is planned methodically. A rushed swap from one carton dimension to another can cost hours of downtime, generate waste and risk non-compliance with the Therapeutic Goods Administration's GMP requirements.
This guide walks through the steps a production engineer or line supervisor would follow to reconfigure a cartoning machine for a different product format, with attention to the mechanical, regulatory and human factors that matter on the floor. It draws on the experience of packaging teams who service Australian pharmaceutical, food and personal care manufacturers, and on technical resources that explain how compression and settling inside the carton affect product integrity.
Assessing product specifications and line constraints
Before touching a single adjustment knob, gather the full data sheet for the new SKU. The dimensions of the product, its weight, its centre of gravity and its surface friction all influence how the cartoner should be set. Australian manufacturers often handle a mix of bottles, blister cards and tubes on the same line, so the changeover must account for how the product feeds from the upstream conveyor into the cartoner's bucket chain. Measure the longest, widest and tallest orientations and compare them against the current bucket pocket, the flight bar spacing and the discharge chute.
It is also worth checking the local climate and storage conditions. Facilities in Brisbane or along the humid Queensland coast can see condensation form on cold-filled bottles, which changes the friction coefficient inside the carton. A product that feeds smoothly in a dry Adelaide warehouse may behave differently when the line is moved to a coastal site. Documenting these variables helps the engineering team decide whether the existing cartoning machine can accommodate the new size or whether a new set of change parts is required.
Finally, confirm the regulatory envelope. Pharmaceutical products sold in Australia must comply with TGA orders, including the labelling and tamper-evident requirements outlined in Therapeutic Goods Order No. 95. If the new product is a scheduled medicine, the carton artwork, batch coding and leaflet insertion must align with Australian-specific templates, which may differ from runs intended for export markets. Sponsors should also verify that the product registration details on the AUST R or AUST L number match the new artwork.
Mechanical changeover of the carton former
With the data in hand, the next step is the mechanical reset. Most modern cartoners, including those built for the Australian market, follow a logical left-to-right sequence. Start with the carton magazine: adjust the hopper rails and the vacuum or mechanical pickers so the blank stack feeds without skewing. Measure the blank width and depth, then set the folding rails and the glue lap detector to match. A small error here can cascade into jams downstream, so take the time to verify with a calliper.
Next, move to the product infeed. The bucket chain or flight bar carries the product into the carton. For a larger or heavier item, the bucket pocket may need to be swapped or shimmed. Check the pusher stroke length and the dwell time at the insertion point. A common mistake is to assume the default settings will work for a slightly bigger product; in practice, the increased mass can cause the product to shift inside the bucket and jam at the insertion horn. Adjust the pusher speed and the timing cam so the product slides cleanly into the carton without scuffing the printed surface.
Carton closing is the final mechanical stage. The tuck-in blades or hot-melt sealing unit must be set so the flaps fold without tearing. For heavier cartons used in the hardware or supplement sector, a hot-melt applicator with a larger nozzle may be needed. Run a few empty cycles to confirm the timing before introducing product. Listen for any abnormal sounds and watch the discharge chute for signs of carton distortion.
Configuring folding, gluing and insertion systems
Beyond the basic changeover, the folding and gluing systems often need fine-tuning. If the new product requires a four-side-seal carton rather than a tuck-end, the entire sealing station must be reconfigured. This involves swapping the folder belts, adjusting the compression rails and recalibrating the glue temperature. In Australian facilities running multiple SKUs, it is common to keep a dedicated set of change parts for each carton style, labelled and stored in a colour-coded rack near the line. This approach reduces the risk of installing the wrong part and speeds up the next changeover.
The leaflet and insert placement is another area that demands attention. Australian pharmaceutical lines typically include a Consumer Medicine Information leaflet, which must be present in every carton. Verify that the insertion finger is set to the correct depth and that the leaflet folder has been adjusted to the new paper weight. If the product is a combination pack with two leaflets or a sample sachet, the insertion sequence may need to be reprogrammed in the PLC. A small software mismatch can cause the leaflet to be missed on every tenth carton, which is a recall-worthy defect.
Coding and vision systems also fall into this configuration block. The inkjet or laser coder must be positioned to print on the correct panel, and the vision camera should be re-taught to recognise the new artwork. Many Australian lines use Cognex or Keyence vision systems with job-changeover recipes stored by SKU number, so the setup is a matter of selecting the right recipe and confirming the lighting and focus are adequate for the new substrate. Glossy cartons may require a polarising filter to reduce glare on the camera.
Coding, marking and compliance settings
Coding is where regulatory and practical considerations meet. In Australia, primary cartons for medicines must carry the batch number, expiry date and AUST R or AUST L number in a font and position that meets TGO 95. When the carton size changes, the print head must be repositioned and the print parameters updated. A change in the carton substrate, such as moving from a solid bleach board to a recycled fibreboard, may also require a different ink type or laser wavelength to ensure legibility. Test prints should be checked under the lighting conditions of the retail environment, not just the factory floor.
Marking for export adds another layer. If the new product is destined for both domestic and trans-Tasman markets, the coding system must be able to switch between Australian-only and Australian/New Zealand labelling without manual intervention. AS/NZS standards govern many of the symbol and warning requirements, so the engineering team should consult the relevant standard before locking in the coding layout. For example, AS/NZS 2161 governs pictograms for poison schedules, and the size and placement of these symbols may need to scale with the new carton.
It is worth noting that the TGA conducts unannounced inspections, and coding errors are a common cause of recall. Running a validation batch with the new settings and retaining a retain sample is a prudent step. Some manufacturers in Victoria and New South Wales have adopted electronic batch record systems that automatically log the coding parameters, which simplifies traceability and reduces the risk of human error during changeover. These systems also help during audits, since the data is timestamped and tamper-evident.
Validation runs and quality verification
Before the line is released to production, three validation runs should be completed. The first is a dry run with empty cartons to confirm the mechanical timing. The second is a wet run with the actual product but with the rejection system bypassed, so any jams or misfeeds can be observed without scrapping output. The third is a full production run with the rejection system active, typically lasting thirty minutes to an hour, during which quality control samples are pulled at set intervals. Each run should be documented in the batch record, with signatures from the operator, the line supervisor and the QA representative.
During validation, pay particular attention to the compression forces inside the carton. A product that is too loose can shift during transport, while a product that is over-compressed can be damaged. Technical resources that explain cartoning compression and settling can help calibrate the correct tightness. For fragile items such as glass vials or blister packs, consider adding a pad or divider and verify that the settling curve flattens within the expected dwell time. If the product settles too much, the consumer may perceive the carton as under-filled, which can lead to complaints.
Quality verification also includes checking the seal integrity on glued cartons. A poor seal can lead to product contamination or tampering concerns. Pull samples at the start, middle and end of the validation run and test the bond strength with a manual pull test or an automated seal-strength rig. Document the results in the batch record and have the QA team sign off before the line is released.
Key parameters and acceptance criteria for each stage:
| Validation stage | Key parameters | Acceptance criteria |
|---|---|---|
| Dry run (empty cartons) | Timing, alignment, fold geometry | Zero jams over 50 cycles, square folds |
| Wet run (product, rejection bypassed) | Feed rate, insertion force, settling | Product feeds without scuffing, settling within spec |
| Full run (rejection active) | Seal strength, code legibility, vision reject rate | Seal strength above limit, 100% code readability, reject rate under 0.5% |
| Final inspection | Carton dimensions, print position, leaflet presence | All samples within tolerance, zero missing leaflets |
Operator training and continuous optimisation
A changeover is only as good as the people who execute it. Once the new settings are validated, walk the line operators through the sequence. Australian manufacturing teams value clear, hands-on training, so a quick demonstration at the machine is more effective than a written procedure alone. Highlight the points where the new product differs from the previous one: the bucket size, the coding position, the leaflet insertion depth. Encourage operators to flag any unusual noise, vibration or product behaviour during the first few production runs. A culture where the operator feels comfortable raising issues early prevents small problems from becoming large recalls.
Continuous optimisation is part of the handover. Review the changeover time, the waste rate and any micro-stops that occurred during the first shift. If the changeover took longer than the standard, conduct a root-cause analysis and update the standard operating procedure. Many Australian plants use a continuous improvement framework such as lean or Six Sigma, and the changeover data feeds directly into overall equipment effectiveness calculations. Setting a target changeover time and tracking it on a whiteboard near the line keeps the team focused on incremental gains.
Staying current with industry developments also helps. The packaging sector is evolving rapidly, with new sustainable substrates and smart coding technologies entering the market. Resources that track these shifts, such as manufacturing broadcasts, can help engineering teams anticipate the next changeover challenge. Whether the goal is faster changeovers, reduced waste or better compliance, the principles remain the same: know the product, respect the machine, and document every adjustment.