Intralogistics Conveyor Systems and Packaging Automation for a Leading Snack Food Manufacturer

Connecting Production, Packaging and Robotic Palletizing into One Integrated Material Flow

1. Executive Summary

A leading Indian snack food manufacturer approached Alligator Automations to improve material movement across its high-volume production and packaging facility. The plant had already invested in automated primary packaging, but the processes connecting production, secondary packaging and palletizing still relied heavily on manual handling.

Multiple VFFS machines were producing packaged snack pouches efficiently. However, once the pouches left these machines, operators collected them in crates or trays, moved them using trolleys and manually transferred them between different packaging stages. Sealed cases were again handled manually before reaching the palletizing area.

Several standalone conveyor systems had been introduced over time, but they worked as separate sections rather than as part of one integrated material handling system.

As production volumes and SKU variety increased, this fragmented approach led to congestion, unnecessary product handling, inconsistent routing and greater dependence on operators. Differences in machine cycle times also meant that a short interruption at one stage could quickly affect several other processes.

Alligator Automations was engaged to look beyond individual conveyors and engineer a complete conveyor automation and packaging automation system.

The project connected primary packaging, product transfer, controlled accumulation, secondary packaging, case conveyor systems, routing, robotic palletizing and pallet handling into one coordinated material flow.

A major requirement was to integrate the new automated material handling system with the customer’s existing machines from multiple OEMs. VFFS machines, check-weighers, metal detectors, coding systems and other equipment that were already performing effectively had to remain part of the production line.

The result was an integrated intralogistics and end-of-line automation system in which conveyors, sensors, PLC controls, packaging equipment and robotic palletizing worked together rather than operating as isolated machines.

The value of the project was therefore not simply the installation of additional conveyor systems. It was the engineering required to connect every process into one reliable material flow.

2. Background & Operational Context

The customer is a leading manufacturer in India’s packaged-snacks sector, supplying products through modern retail, general trade and institutional channels.

Its manufacturing facility operates multiple production and packaging lines across several shifts and handles a wide variety of SKUs, pouch sizes and secondary packaging formats.

This creates a demanding environment for packaging automation and material handling.

Snack manufacturers regularly manage frequent product changes, promotional pack sizes, varying case configurations and relatively short production runs. A material handling system in this type of facility therefore needs to provide more than simple product transportation. It must support changeovers, different line speeds, multiple product routes and downstream packaging requirements.

Before the project, the plant already had a strong base of production equipment.

Multiple vertical form-fill-seal lines produced pillow-pack pouches and discharged them onto short take-away conveyors. The facility also included check-weighers, metal detectors, coding and labelling equipment, carton sealers and other machines supplied by different OEMs.

However, much of the movement between these machines remained manual.

Operators collected pouches into crates or trays and moved them by trolley toward collation and secondary packaging. Case packing included both manual and semi-automatic activities. Finished cases were then moved toward palletizing and staging areas, while forklifts handled finished pallets.

The issue was therefore not that the individual machines were incapable.

Each machine performed the job for which it had been installed. The problem was that there was no common conveyor automation or material flow architecture connecting them.

Machines had their own controllers, operating logic and interfaces. Material moving from one machine to another often depended on operator coordination rather than an integrated automated material handling system.

As production capacity increased, adding another high-speed machine would not have solved this issue. The growing constraint was no longer inside the machines.

It was the movement between them.

3. Challenge & Problem Definition

The project began by identifying where the existing material handling process was limiting overall packaging-line performance.

Excessive Manual Handling

Snack pouches are lightweight, flexible and often air-filled. They require careful handling because repeated pressure, tipping or uncontrolled transfer can deform the package or place unnecessary stress on seals.

Before the conveyor automation project, products could be handled several times between primary packaging and robotic palletizing.

Pouches were collected, carried, placed into crates, transported and transferred again at subsequent packaging stages. Corrugated cases also required manual movement and stacking.

This created several concerns:

• Pouch deformation
• Seal stress
• Occasional product damage
• Case damage during handling
• Additional manual effort
• Increased product contact

For a food-manufacturing facility, reducing unnecessary handling was important for both product quality and hygiene.

Packaging-Line Congestion

Trolleys, crates, temporary staging areas and operators competed for valuable shop-floor space.

At the same time, primary and secondary packaging machines did not necessarily operate at identical speeds.

Primary packaging may operate continuously, while case packing, robotic palletizing and stretch wrapping work in defined cycles.

Without an engineered accumulation conveyor system between these processes, even a short downstream interruption could immediately affect upstream production.

Pouches might accumulate near discharge points, be temporarily stored in crates or eventually force the upstream machine to stop.

Conversely, the secondary packaging line could remain idle if products were not supplied consistently.

Operator-Dependent Product Routing

Routing also depended heavily on manual decisions.

Operators needed to know which pouches belonged at particular case-packing stations and which cases needed to reach specific palletizing destinations.

Frequent SKU changes increased this complexity.

Changeovers could involve moving trolleys, modifying staging arrangements, physically rerouting products and briefing operators on the revised process.

The system therefore depended significantly on individual experience and shift-to-shift communication.

Limited Controlled Accumulation

When downstream packaging equipment stopped, there was little controlled buffering capacity available.

Products could accumulate in temporary crates or unsuitable shop-floor areas rather than within an engineered accumulation conveyor.

This not only affected productivity but also increased cleaning requirements and created additional hygiene concerns.

Limited Visibility and Scalability

Manual material handling also made it more difficult to understand where products were accumulating and which process was limiting production flow.

Under the existing system, increasing production capacity could also require more operators simply to move materials.

For sustainable growth, the plant needed a scalable automated material handling and packaging line automation system rather than increasing manual handling alongside every production expansion.

4. Project Objectives & Success Criteria

The project followed a clear engineering principle: first define the complete material flow, then select the conveyor systems, controls and automation required at each stage.

The target process was:

Primary Packaging → Product Transfer → Controlled Accumulation → Secondary Packaging → Case Conveying → Routing → Robotic Palletizing → Pallet Handling

The first objective was to connect these previously fragmented operations into one integrated material handling system.

The second objective was to decouple machines operating at different speeds. Controlled accumulation had to be introduced so that a short interruption at one downstream machine did not immediately stop all upstream production.

Another important objective was to integrate rather than replace existing assets. The customer’s VFFS machines, check-weighers, metal detectors, coding equipment, labelling systems and carton sealers were already performing their intended functions.

The new packaging automation system therefore had to work around these machines.

The system also needed to simplify SKU and pack-format changeovers. Conveyor speeds, accumulation parameters, routing destinations and palletizing patterns needed to be controlled through product recipes wherever practical.

Cleaning accessibility, operator safety and maintenance access were also important design requirements.

Finally, the implementation had to be completed without requiring a prolonged shutdown of the production facility.

5. Site Analysis & Engineering Constraints

Before selecting the final industrial conveyor systems, Alligator Automations carried out a detailed plant study during actual production.

The engineering team evaluated the complete movement of products, people and materials across the packaging hall.

Product characteristics were studied first. Pouch dimensions, fill weight, air content, stiffness, stacking behaviour and sensitivity during transfer all influenced conveyor selection.

A flexible snack pouch, for example, cannot be treated in the same way as a rigid corrugated case.

Different packaging formats were reviewed, including retail pouches, multipacks, corrugated cases and pallet configurations.

Machine output rates and operating cycles were then analysed to identify differences between primary packaging, secondary packaging and palletizing.

Understanding these rate differences was essential for determining where accumulation conveyor systems were required and how much product each buffer needed to hold.

The team also reviewed existing machine discharge heights, transfer geometry, usable interface points and available control signals.

Importantly, the study went beyond layout drawings.

Engineers observed operator walking routes, trolley movement, cleaning access, maintenance areas and product entry and exit points. The behaviour of the line during stoppages and restart conditions was also considered.

Several physical constraints influenced the final conveyor system layout:

• Limited available floor space
• Structural columns
• Existing plant services
• Drainage
• Operator walkways
• Existing production machinery
• Cleaning and maintenance access

These restrictions influenced conveyor elevations, transfer points and the use of incline and decline conveyors.

Hygiene requirements were also considered from the beginning. Washdown practices, food-contact areas, cleaning accessibility and areas unsuitable for open accumulation were identified during the study.

At the downstream end, the team reviewed case formats, pallet dimensions, palletizing patterns and finished-goods movement.

The controls engineering team also studied the existing PLC architecture and determined what signals could be obtained from each OEM machine, including availability, fault status, reject information and transfer handshakes.

Future capacity growth and additional SKUs were considered as well.

Only after this complete operational picture had been established were the final conveyor technologies, buffering strategy and control architecture selected.

6. Solution Strategy & System Architecture

The final solution was developed as a complete intralogistics and packaging automation architecture rather than a collection of independent conveyor systems.

The system was divided into four interconnected material-handling layers.

At the product layer, pouches leaving existing VFFS machines entered take-away belt conveyors. Transfer, incline and decline conveyors moved products toward the required collation level, while controlled accumulation was introduced before secondary packaging.

At the secondary packaging layer, pouches were aligned, oriented, spaced and counted so that the case-packing equipment received products consistently.

At the case handling layer, sealed cases moved through coding, inspection and case conveyor systems. Merge and divert conveyors routed cases from multiple packaging lines toward the correct palletizing destination.

At the pallet handling layer, cases entered the robotic palletizing system. Empty pallets were supplied to the cell, loaded pallets discharged automatically and pallet conveyor systems transferred finished loads toward stretch wrapping and staging.

A supervisory PLC control layer coordinated product availability, routing and release throughout the complete system.

The objective of the architecture was to turn previously separate packaging and material handling processes into one integrated conveyor automation system.

7. Engineering & Customization

A major part of the project involved selecting the correct conveyor technology for each stage of the process.

Different products require different handling principles. Lightweight snack pouches, corrugated cases and fully loaded pallets cannot all be moved using the same conveyor design.

Food Conveyor Systems for Pouch Handling

For light, air-filled pouches, continuous support was essential.

Food-grade belt conveyors were therefore used in relevant product-handling areas. These helped prevent flexible packs from sagging, tilting or losing orientation during movement.

Stainless-steel conveyor construction was used in areas where hygiene and wet-cleaning requirements justified it, while modular belting was applied where frequent sanitation and easier maintenance access were important.

Incline and decline conveyors allowed products to move between elevations while maintaining operator walkways and making better use of available floor space.

Case Conveyor Systems

Once pouches were packed into corrugated cases, the handling requirement changed.

Cases are heavier, rigid and stable, making powered roller conveyor systems better suited to transportation.

Roller conveyors were used for straight sections, curves, merges and diverts.

Zero-pressure accumulation conveyors were introduced where cases needed to queue without continuously pressing against one another.

This was especially important for corrugated cases, where excessive line pressure can damage case corners and affect pallet stability.

Transfer, merge and divert systems allowed cases arriving from multiple packaging lines to use common conveyor routes before being directed toward their assigned robotic palletizing system.

Alignment sections also ensured that each case reached the robot in a repeatable position.

Pallet Conveyor Systems

Loaded pallets were handled on industrial conveyor systems designed for full pallet loads.

Accumulation was included around the stretch-wrapper interface so that the palletizing system did not need to stop during every wrapping cycle.

Material selection varied according to the environment.

Product-contact and wet-cleaning zones used stainless-steel construction and food-grade belting where required. Case and pallet areas could use mild-steel or galvanised construction where appropriate.

This approach balanced hygiene, reliability, maintenance and cost.

Buffering & Accumulation Strategy

Accumulation was engineered as a functional part of the material handling system rather than simply adding unused conveyor length.

The pouch buffer before secondary packaging absorbed differences between continuously operating VFFS machines and cyclic case-packing equipment.

This allowed primary packaging to continue during short interruptions such as carton-magazine replenishment, tape replacement or minor downstream stoppages.

The case accumulation conveyor before robotic palletizing temporarily stored sealed cases while the robot completed a pallet layer, changed pattern, waited for an empty pallet or recovered from a short interruption.

Pallet accumulation similarly separated the operating cycle of the palletizer from the stretch wrapper and forklift collection.

Each buffer was sized according to actual stoppage behaviour observed during the plant study rather than according to a generic rule.

PLC Control & Line Synchronisation

PLC control transformed the conveyor systems into one coordinated packaging line.

Sensors monitored product movement throughout the system, while PLC logic checked downstream availability before allowing products to move forward.

The basic operating sequence was:

The controls architecture was also designed to manage real production conditions.

When upstream production operated faster than downstream packaging equipment, the accumulation conveyor filled progressively. As capacity approached its defined maximum, the PLC could signal upstream equipment and initiate a controlled production reduction or stop.

If secondary packaging stopped, products accumulated within the designed buffer rather than immediately stopping the primary packaging line.

If a case failed to confirm at the expected routing point, sensors allowed it to be diverted toward an inspection or reject area instead of continuing incorrectly toward robotic palletizing.

If the palletizing system became unavailable, cases could remain in controlled accumulation and, where applicable, be directed to an alternative destination or manual staging spur.

When maximum accumulation capacity was reached, the line stopped in a defined sequence beginning at the actual constraint and moving upstream.

Restart logic worked downstream to upstream. This ensured accumulated products were released only when downstream space was available.

For SKU changes, operators selected the required recipe through the HMI. Conveyor speeds, accumulation settings, routing destinations and robotic palletizing patterns could then change together.

Integration with Secondary Packaging

At the secondary packaging interface, the role of the material handling system was not simply to transport products.

Pouches arriving from multiple production lines had to be correctly aligned, oriented, spaced and counted before entering the case-packing system.

Products were released according to the rate that the downstream machine could accept.

Gentle transfers and controlled conveyor speeds helped reduce pouch deformation and unnecessary stress on seals.

Recipe-based parameters also reduced physical adjustment during product-format changes.

Robotic Palletizing Integration

After secondary packaging, sealed and coded cases moved automatically on case conveyor systems toward robotic palletizing.

Case identification confirmed the SKU, case format and required palletizing destination.

Cases from different production lines could merge onto shared conveyors and then divert toward the appropriate robot cell.

Alignment conveyors presented cases consistently to the robot, supporting reliable pallet-pattern formation.

Palletizing patterns were stored as recipes within the PLC and HMI, allowing standard SKU changes without manually re-teaching the robot.

The palletizing system also incorporated:

• Empty-pallet feeding
• Automatic loaded-pallet discharge
• Pallet conveying
• Stretch wrapping
• Finished-pallet staging
• Safety fencing
• Interlocked access doors
• Light curtains

Automatic truck loading was identified as a potential future phase and was not part of the current project scope.

Integration with Existing OEM Equipment

The facility already contained machines from several OEMs, making equipment integration one of the most important engineering aspects of the project.

Existing VFFS machines, check-weighers, metal detectors, coding systems, labelling equipment and carton sealers were retained.

Alligator Automations’ controls and software engineering teams worked with the signals available from each machine, including:

• Run/stop status
• Machine availability
• Fault information
• Reject signals
• Transfer handshakes

Where an OEM machine could not provide the required communication signal, sensors and conveyor-zone logic were used to establish the necessary interface without unnecessary modification of the third-party equipment.

This allowed existing equipment and new packaging automation to operate within one coordinated material handling system.

Food Safety, Hygiene & Operator Considerations

Food conveyor systems must also support practical sanitation and operator requirements.

Relevant areas incorporated stainless-steel construction, food-grade belting and layouts that improved cleaning access.

Controlled accumulation was positioned in suitable locations rather than allowing products to collect randomly around the packaging hall.

The design also incorporated guarding, emergency stops, safety interlocks and maintenance access.

Reducing repetitive crate handling, lifting and bending also improved operator ergonomics.

No specific food-safety certification is claimed as part of this project. Materials and construction details were agreed with the customer’s quality team according to its internal requirements.

8. Implementation, Integration & Commissioning

The plant needed to continue production during the packaging automation project, so implementation was planned in phases.

Mechanical installation and electrical cabling were primarily carried out during planned maintenance windows and lower-production periods.

Existing structural columns, plant services, drainage and operating machinery restricted several potential conveyor routes. Site-level adjustments were therefore made during installation while preserving the intended material-flow architecture.

Commissioning was carried out progressively rather than switching on the entire system at once.

Individual machine interfaces and communication handshakes were tested first. Engineers then validated accumulation behaviour, routing logic and the robotic palletizing system.

After each interface had been proven, the complete automated material handling system was tested across multiple SKUs.

Operator and maintenance training was also treated as part of commissioning.

Teams were trained in:

• Recipe selection
• Product changeovers
• Accumulation behaviour
• Normal operation
• Fault recovery

This helped ensure that operators understood not only how to run the system but also how it would respond to everyday production conditions.

9. Results & Business Impact

The completed conveyor automation project changed how material moved through the packaging facility.

Instead of depending heavily on manual transfer between separate machines, the plant gained a connected material handling system linking primary packaging, secondary packaging and robotic palletizing.

Designed accumulation reduced the need for temporary crates and uncontrolled product buildup.

PLC-controlled routing also reduced reliance on operator judgement for routine product movement.

Gentle product transfers and controlled conveyor speeds helped reduce pouch deformation, seal stress and case damage.

Secondary packaging and robotic palletizing equipment also received a more predictable product flow.

Before vs After Automation

The business impact went beyond replacing manual product movement with conveyors.

Operators who previously spent significant time carrying crates, pushing trolleys and manually moving cases could focus more on line supervision, quality checks, changeover execution and exception handling.

The project also created a more scalable platform for production growth.

Modular conveyor systems allow additional sections and spurs to be introduced when required. Interface points can support additional primary packaging lines, while PLC architecture can accommodate new SKUs, routing rules and palletizing recipes.

Future phases can also extend the end-of-line automation system toward deeper warehouse integration and automatic truck loading.

The project does not claim zero downtime, zero product damage, complete automation or elimination of manpower.

Those were not the objectives.

The objective was to create a more controlled, efficient and scalable packaging automation and material handling system while reducing repetitive manual handling and improving coordination between machines.

10. Conclusion & Key Takeaways

At first glance, the equipment used in the project is familiar: belt conveyor systems, roller conveyors, accumulation conveyors, merges, diverts, pallet conveyors and robotic palletizing.

What made the project different was how these elements were engineered to operate together.

The plant study established the requirements at each machine interface. Product characteristics guided conveyor selection. Machine cycle times determined buffer requirements. PLC logic controlled when products moved, while routing logic determined where they moved.

Existing machines from several OEMs were integrated into the same conveyor automation architecture rather than being replaced unnecessarily.

For food and beverage manufacturers, this integrated approach is particularly important.

High SKU counts, frequent changeovers, lightweight packaging, short production runs and strict hygiene requirements mean that even capable individual machines can underperform when the material flow between them remains disconnected.

By engineering the complete material handling process instead of simply installing additional conveyors, Alligator Automations helped transform a fragmented packaging operation into an integrated intralogistics and end-of-line automation system.

The resulting solution connects primary packaging, food conveyor systems, secondary packaging, case conveyor systems, robotic palletizing and pallet handling within one coordinated flow.

It provides more consistent product movement, better control over routing and accumulation, reduced repetitive handling and a stronger foundation for future production expansion.

Planning a Similar Intralogistics or Conveyor Automation Project?

If a packaging line is congested, machines repeatedly stop one another, products rely heavily on manual transfer, or increasing production requires additional material-handling manpower, the constraint may not be the production equipment itself.

It may be the material flow between those machines.

Alligator Automations designs and implements conveyor systems, packaging automation, automated material handling, robotic palletizing and end-of-line automation solutions from its manufacturing facility in Chakan, Pune, supported by in-house application engineering, mechanical design, controls, software and project management teams.

Talk to our application engineering team about evaluating your complete material flow — from production and packaging through robotic palletizing and dispatch.