Background
A large-scale food cold chain 3PL provider implemented a high-density pallet shuttle car system to manage their high-turnover inventory using FIFO/LIFO methods. The system operates in an environment ranging from -22°F to 113°F, handles channels over 130 feet deep, and requires a shuttle capacity of up to 3,300 lbs per pallet.
Challenges
Under these extreme automated operational requirements, the client faced several critical challenges with their original wheels:
Dynamic Fatigue Under High-Speed Operation: The shuttle operates at 148 ft/min when loaded. In the -22°F freezer environment, the original wheels harden, increasing internal friction, which leads to "flat spots" and a sharp increase in rolling resistance during frequent high-speed travel.
Positioning Accuracy Deviations: High-speed travel (295 ft/min unloaded) places extreme demands on traction. Once the surface of the original wheels cracks due to cold brittleness or slips on wet rails from condensation, the shuttle experiences positioning offsets, causing WMS system errors.
Maintenance Needs and Operational Downtime: Frequent failures of the standard-spec wheels force forklift operators to enter the freezer for emergency repairs. This disrupts automated workflows and creates significant energy losses and safety risks.
Solution
To address these pain points caused by the original wheels, we have upgraded the solution to specialized polyurethane (PU) wheels with the following technical enhancements:
High-Speed Dynamic Toughness: Our polyurethane wheels are specifically engineered for the 148 ft/min (loaded) and 295 ft/min (unloaded) duty cycles. They remain deformation-free and avoid the cold-brittleness that plagued the standard-spec wheels, fully supporting the 10-hour continuous lithium battery runtime.
Hydrolysis Resistance & Anti-Slip Design: The polyurethane material is formulated with superior hydrolysis resistance for cold storage condensation environments. The surface texture is optimized to eliminate traction issues inherent in the original wheels, ensuring consistent performance during high-speed travel and eliminating positioning errors.
Heavy-Load Structural Optimization: Reinforced to handle a 3,300 lbs load per pallet, our polyurethane design ensures the wheel maintains its profile during travel across 130 ft+ channels, preventing the high-speed compressive deformation seen in the original wheels and reducing overall system power consumption.
Results
True Automation Achieved: Significantly reduced shuttle jams caused by the failure of original wheels during high-speed, heavy-load operations, effectively eliminating the need for forklifts to enter the freezer.
Operational Efficiency & Safety: Consistent performance of the polyurethane wheels across extreme temperature variances ensures precise execution of WMS commands, guaranteeing the continuity of freezer operations
Reduced Maintenance Costs: Replacing the standard-spec wheels with our customized polyurethane solution significantly extends service life, reducing direct replacement costs and avoiding the additional labor expenses and safety risks associated with internal freezer maintenance.
If your warehouse is facing similar downtime or positioning issues in extreme temperatures, our team can provide a technical compatibility analysis for your specific shuttle configuration. Contact Our Engineering Team for a Consultation