~ New technologies are changing the face of food packaging ~
The technological and social revolutions of the past few decades have completely reshaped industry. The food packaging and palletising industry is no exception. In fact, the last ten years alone has seen the adoption of advanced technologies at an unprecedented rate. Here, Alan Spreckley, robotics food and beverage segment manager and palletising robotics expert at ABB, explains how digitalisation is repackaging the future of food palletising.
The last two decades have seen a decline in the nuclear family and a global rise in the number of private households with only a single occupier. In 2014, the UK office of national statistics (ONS) conducted a study that found 28 per cent of UK households had only one inhabitant. Likewise, the labour force survey (LFS) showed that one-third of European households are single person, while the US has been experiencing a significant increase of single person households since the 1920s.
This growing trend places a higher demand for single-portion servings of pre-prepared and pre-packaged food on the food industry, which makes the packaging and palletising processes less linear than they have previously been. Similarly, the unstable economy of recent years has nurtured a generation of savvy customers, eager for the special offers and deals that retailers regularly provide, further complicating the palletising process. This leads to scenarios where manufacturers will be required to change palletising patterns quickly and cost efficiently to deliver this.
To keep pace with this changing demand, plant managers and process engineers must ensure that the palletising process is as efficient and effective as possible. This means keeping systems maintained and palletising patterns up-to- date, while minimising any risk of downtime or hindered performance.
To make these processes easier to manage, plant managers have been increasingly turning to new technological solutions; solutions that are a step beyond the traditional automation systems or machines that have previously improved industrial performance.
In the twenty-first century, digital technologies and software are proving to be the unconventional ally of the modern plant manager.
Robots have been a staple of the food industry since the 1980s, with most businesses using at least one robotic system for some part of the production line. Palletising robots have proven particularly popular among plant engineers as they increase productivity, improve working conditions and can be easily integrated into existing production systems.
However, the process of integrating palletising robots has traditionally relied on computer assisted design (CAD) drawings and involved a lot of estimation. Food plant managers provide approximate dimensions to robot manufacturers for the robot and leave the rest in the hands of the manufacturer, who tests the product in its own facility before finalising and installing onsite.
While this approach is sufficient for some businesses, it can open up several performance problems. For example, CAD drawings alone do not necessarily provide an accurate representation of the operating environment and the robots still need to be programmed after installation. This lengthens periods of unproductive downtime to accommodate the placement and programming of a new robot.
To minimise unproductive downtime, the process of virtual commissioning is becoming increasingly popular among plant managers, often using ABB’s innovative suite of virtual commissioning tools. Instead of using CAD drawings and developing robots in an external environment, the process is modelled in 3D which provides an accurate visualisation of a factory layout. This allows plant engineers to see a digital representation of how the robot will integrate and move within the process, and allows them to discover and resolve any potential technical issues before they become a reality, reducing commissioning time by up to 25 per cent.
For example, one of the most common causes of damage to palletising robots is collision with a cell’s support pillar during operation. By using a virtual commissioning platform, such as ABB’s RobotStudio® these instances of collision can be fully discovered and resolved in a time and cost efficient manner on the computer. This helps minimise the actual, physical commissioning.
Remote condition monitoring
Once commissioned, robots are machines like any other and they are susceptible to component wear over time. As such, regular maintenance is required to ensure that everything is functioning effectively and safely.
This doesn’t pose much of a problem for plants that are ahead of the curve and running on an Industrial Internet of Things (IIoT) network. IIoT allows engineers to assess cloud data to assess the performance of machinery remotely and schedule maintenance work accordingly. ABB has put together a suite of connected services that provides services that are available 24/7. These include condition monitoring and diagnostics, backup management, remote access, fleet assessment, and asset optimisation.
This level of information provides plant engineers with advance notice when service is or unproductive downtime occurs.
Real-time offline programming
While virtual commissioning and remote monitoring technologies both keep factories running, it is the development of offline programming software that yields efficiency benefits for plant managers. This is software that allows the remote programming of palletising robots without interrupting production.
For example, if a retailer usually asks for four-packs of tinned soup but decides to offer a 50 per cent-extra- free offer for a period of time, the palletising robot will be required to change palletising patterns accordingly. Failure to do this effectively could result in businesses being unable to supply a sufficient amount of product to retailers, which leads to lost contracts and the risk of heavy supplier fines.
Plant managers can prevent this by digitally reprogramming palletising robots using offline software such as ABB’s RobotStudio, which can be accessed using a standard PC to change palletising patterns. This reduces the time taken to change over and boosts overall productivity to ensure that demands are met.
In the nineteenth and twentieth centuries, the automotive sector was one of the most technologically advanced and adaptive industries. If the past decade is anything to go by, the food industry is quickly building a similar reputation. By thinking more about digital solutions to production problems, plant managers can ensure that food processing becomes the automotive industry of the modern age, easily coping with the demands of the nuclear family and single occupier households.