A successful retrofit connects the cartoner to the real product flow, controls, guarding and site constraints. Start with a measured survey and an interface schedule—not a stand-alone machine footprint.
A cartoning-machine retrofit should begin with a measured survey of the existing line, retained equipment and production states. The available floor space is only one constraint; product presentation, conveyor height, access, services, controls, guarding and shutdown windows can determine whether the project is practical.
Record the current line at normal production, during starvation, blockage, changeover and fault recovery. Identify which upstream machine releases the bottle, where accumulation occurs, how product identity is maintained and what the downstream process expects from the finished carton.
Each physical and control interface should have one named owner and one acceptance method. Unallocated interfaces often become late site work, while duplicated ownership can produce conflicting controls or guarding assumptions.
| Interface | Questions to resolve | Evidence before installation |
|---|---|---|
| Mechanical | Conveyor hand-off, datum, height, support, accumulation and finished-carton discharge. | Approved layout, interface drawing and measured existing equipment. |
| Controls | Ready, run, starved, blocked, fault, emergency stop, speed reference and reset ownership. | I/O and line-state schedule with safe restart sequence. |
| Safety | Guarding boundary, access, emergency-stop zones, trapped product and integration responsibility. | Agreed risk-assessment boundary and validation responsibilities. |
| Utilities and data | Power, air, network, coding, inspection, batch data and remote support. | Site service schedule and approved connection points. |
Use the line-integration guide and site-preparation guide to build the schedule.
Retrofit accumulation should be based on the duration and consequence of actual line stops, not simply the longest conveyor that fits. The cartoner must stop, restart and recover without damaging bottles, losing product identity or creating an incomplete carton group.
List the stops the line must absorb: carton blank replenishment, leaflet refill, coding fault, reject-bin full, downstream blockage and upstream starvation. For each one, define whether the line buffers, slows, stops or diverts product. State what happens to bottles already assigned to a carton and how counts are reconciled after the fault.
The control and restart guide provides the line-state questions to test during FAT and SAT.
A retrofit installation plan should identify what can be proved before shutdown, what must be connected on site and what production evidence is required before handover. This reduces the risk of discovering access, signal or product-flow constraints after the existing line has been stopped.
Use the FAT, SAT and commissioning guide to define the evidence package.
A cartoner can often be considered for an existing line when product presentation, available space, conveyor interfaces, accumulation, controls, guarding, services and installation access can be defined. A site survey and interface review are needed before assuming that a stand-alone machine can be connected directly.
Measure the available floor and maintenance envelope, conveyor heights and directions, product datum, fixed obstructions, access routes, service points and retained equipment. Include elevations and photographs, because a plan view alone does not show overhead services, access doors or transfer-height constraints.
The machines exchange defined states such as ready, running, starved, blocked and faulted, with agreed ownership of speed reference, stop and reset. The exact interface may use hardwired signals or an approved network, but the behaviour must be documented and tested independently of the communication method.
Accumulation may be needed when the cartoner or adjacent machines have short stops that should not stop the complete line. The amount and method depend on bottle stability, allowable pressure, stop duration, product identity and available space. Some products require controlled pockets rather than pressure accumulation.
Site acceptance testing should prove the installed mechanical transfers, services, line states, guarding, safety functions, product tracking, rejects, restart behaviour and accepted production formats under agreed site conditions. It should also record deviations, open actions and the evidence needed before production handover.
Send a measured layout, photographs, current product flow, control states, retained equipment and the planned installation window for an initial application review.