Recently, the Nelson Technical Center encountered a problem that was not only causing a big headache but was also costing our customer valuable time and money.
The Problem: a load of oriented strand board (OSB) pallets were “bowing.
The pallet was a solid wood block-style pallet with an OSB panel for the top deck. Usually, a bowing pallet is not a big issue. Once you load product on most pallets, the weight will will flatten out any bowing. In this case, an empty single-bulk corrugated box was to be glued to the panel deck pallet.
When the box touched the middle of the pallet, it was lifted 1/2" from the pallet on the sides. Unable to glue the box, the customer could not ship the empty boxes to the next location for loading in product.
For a year, the customer had never experienced this issue. Nelson went to the customer site to inspect the load.
Some onsite troubleshooting led to the following discoveries:
After further investigation into the effect of the heat-treating (HT) process on OSB, Nelson discovered that OSB is likely to bow during the (HT) process. Since these pallets were made in very cold weather, we suspected the bow was worse because they were in the HT process longer than the previous pallet loads.
We fixed the problem by reworking the load.
The Follow Up:
There have been no further bowing issues since this manufacturing change was implemented.
Have bowed or warped pallets ever caused your company problems? Share your story with us by commenting below. We can help find you a technical solution.
Post by: John Clarke, Technical Director
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