With all those grades and sizes, how do you automatically palletize apples, pears and peaches?
Apple, pear, peach and other tree fruit packers have not been quick to adopt fully automatic palletizing solutions because they face the unique challenge of having as many as 30 or more different product codes, and each individual product code requires a dedicated pallet.
To overcome this challenge, a popular strategy in the United States has been to install elaborate accumulation systems that are made up of 30 or more box conveyors, each with enough capacity to hold a full pallet of apples, pears, peaches or whatever tree fruit is being packed.
Generally how it works is…The accumulation system communicates with a computer that scans the bar-codes on the fruit boxes and then the boxes are distributed according to these codes to their corresponding accumulation lanes where they are staged for palletizing.
With such a set up, there are typically 1 or 2 automatic palletizers that receive the fruit from the accumulation lanes until the pallets are stacked, at which time the exit on the accumulation lane is signalled to stop/close to allow another lane to open up and be palletized.
The advertised advantage of this method is that it is more cost effective for the purchaser because they are only purchasing a couple of expensive palletizers versus the several that would be required to have dedicated palletizers for every product SKU.
Though this sounds like a reasonable argument up front, what generally isn’t realized is the fact that accumulation systems are also very expensive. And expense isn’t the only drawback. Here are some others:
- The fruit ends up sitting on these accumulation systems for a long time which keeps them out of cold storage.
- They take up a lot of expensive floor space.
- The success of the system relies solely on one or two palletizers, so if there is a mechanical issue with the one or two palletizers, the entire system shuts down.
- Accumulating to multiple lanes requires a tremendous number of sensors, relays and switches all of which have to be in sync, well programmed and working properly to make the system work.
Why don’t they use box accumulation systems in Europe?
Though the above reasons may contribute to why palletizer solution providers in Europe don’t use accumulation systems, I think the primary reason why they don’t use them is simply because they don’t have to.
European palletizer manufacturers, and in particular our manufacturer IPLA understand the importance of modular palletizing solutions. All of our designs are based on the premise that future expansion is inevitable. In Europe, automated palletizing is the norm among fruit packers and producers. Therefore, as companies expand and grow so does their need for more palletizers.
With the very well engineered modular designs that IPLA manufactures, they can install several palletizers side by side very cost effectively and space efficiently because they share common frames and even have shared automation . These systems can also share empty pallet dispensers and full pallet accumulation conveyors (for further cost-effectiveness). The end result is a highly efficient palletizing solution that keeps your apples, pears and peaches as fresh as possible without causing downtime if one palletizer happens to break down. You might also be surprised at how price competitive a multi-palletizer solution can be versus an accumulation based system.
These palletizing systems can also have robotic palletizers for handling multiple SKUs of your boxes that have lesser volumes. The other possibility is having a combo set up with far fewer accumulation conveyors along with several modular palletizers. Fewer accumulation conveyors mean less space, faster palletizing cycles, and less automation logic that can have issues.
Before you invest in an accumulation system, please consider the opportunity costs of doing so. I think you will find that for a similar investment, you can have a much more productive and trouble-free solution, by going with a modular, multi-palletizer solution.