Two-Component Pallet Impact Resistance via Rib Deformation
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Solution Overview
Problem
Plastic molded pallets lack sufficient impact resistance, particularly when subjected to side impacts from forklift tines, leading to reduced useful life.
Innovation Solution
A two-component pallet design featuring upper and lower parts with alignment features and internal ribs that engage to form a positive interlock, allowing the ribs to act as shock absorbers by deforming in a predefined direction during impacts, thereby enhancing energy absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a welded pallet foot is used, then the pallet can be manufactured as a single piece, but the impact resistance is insufficient
Solution Approach 1:
The pallet is divided into two separate components: an upper part and a lower part, which are joined together through welding. This segmentation allows each component to be optimized independently for its specific function while improving overall impact resistance through the engineered joint interface.
Solution Approach 2:
The pallet combines different material properties by joining an upper part and lower part with complementary geometries. The joint interface is designed with interlocking features that create a composite structure stronger than either component alone, particularly in resisting impact forces.
2Duration of action of stationary object
If the pallet structure is simplified, then manufacturing is easier, but the useful life is reduced
Solution Approach 1:
By segmenting the pallet into an upper part and lower part, each component can be manufactured separately using standard molding processes, then joined through a simplified welding operation. This reduces manufacturing complexity compared to creating a single complex piece while extending the pallet's useful life through improved impact resistance.
Solution Approach 2:
The upper part and lower part are merged through welding at a strategically designed joint interface. This merging creates a durable connection that extends the pallet's service life while maintaining ease of manufacture, as the joint design simplifies the welding process rather than complicating it.
3Stability of the object's composition
If alignment features are added to the pallet components, then the structural integrity is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The alignment features use asymmetric geometries where the upper part includes protrusions that fit into corresponding recesses in the lower part. This asymmetric design provides self-alignment during assembly, improving structural integrity while reducing the need for high manufacturing precision, as the asymmetric features automatically position components correctly.
Solution Approach 2:
Alignment features are designed into the components before assembly, with protrusions and recesses pre-configured to guide proper positioning. This preliminary action ensures that when the upper and lower parts are joined, they automatically align correctly, improving structural integrity without requiring post-assembly adjustments or extremely tight manufacturing tolerances.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly increases the impact resistance of the pallet, extending its useful life by effectively absorbing side impacts and maintaining structural integrity.
Implementation Method 1
the ribs to act as shock absorbers by deforming in a predefined direction during impacts, thereby enhancing energy absorption
Implementation Method 2
The parts are bonded by hotplate welding
Data Source
AI summary
A two-component pallet includes an upper part defining a deck and including a plurality of posts, and a lower part including a corresponding plurality of feet arranged in complement with the posts. The posts and the feet each include an alignment member and ribs. The upper part is welded to the lower part such that the ribs are welded together. The alignment member of the posts is engaged with the alignment member of the feet without being welded. In some embodiments, the ribs are bent to better absorb impact from a forklift tine or the like.