Multi-Piece Plastic Pallet Heat Staking Assembly
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Solution Overview
Problem
Current plastic pallets lack durability and strength, while wood and metal pallets face issues such as splintering, moisture-related weight fluctuations, hygiene concerns, and high manufacturing costs, corrosion, and bending.
Innovation Solution
A multi-piece plastic pallet design featuring separately molded top and bottom decks with reinforced structures, including ribs, pallet blocks, and a heat staking assembly process, utilizing thermoplastic materials like HDPE and PP with optional fiber reinforcement, to enhance strength and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plastic pallets are made from standard thermoplastic materials, then they offer advantages over wood and metal pallets, but they lack durability and strength
Solution Approach 1:
The patent applies composite materials by combining thermoplastic matrix material with dispersed reinforcement materials (such as fibers, particles, or structural shapes) to create a pallet that exhibits both the corrosion resistance and hygiene benefits of plastic plus the enhanced strength and durability of reinforcement materials. The composite structure allows the plastic matrix to bind the reinforcement elements, creating a unified component with superior mechanical properties compared to unreinforced plastic.
Solution Approach 2:
The patent implements local quality by strategically placing reinforcement materials at specific locations within the pallet structure where strength is most needed, such as at load-bearing points, corners, or areas subject to impact. The reinforcement distribution is non-uniform, concentrating material properties where required rather than uniformly throughout the entire pallet, thereby optimizing strength-to-weight ratio.
2Ease of manufacture
If wood pallets are used, then they are cost-effective, but they suffer from splintering, moisture-related weight fluctuations, and hygiene concerns
Solution Approach 1:
The patent applies parameter changes by modifying the material composition parameters of the pallet, transitioning from natural wood to synthetic thermoplastic composite materials. This changes fundamental properties such as moisture absorption (from high in wood to near-zero in plastic), dimensional stability, and resistance to biological degradation, thereby eliminating hygiene concerns and weight fluctuations while maintaining cost-effectiveness through efficient manufacturing processes.
Solution Approach 2:
The patent uses composite materials to achieve a balance between cost-effectiveness and reliability by combining affordable thermoplastic materials with reinforcement elements. The composite structure provides the hygiene and stability benefits of plastic while the reinforcement adds structural integrity, creating a cost-effective alternative to wood that eliminates splintering and moisture-related issues.
3Strength
If metal pallets are used, then they provide high strength, but they suffer from high manufacturing cost, corrosion, and bending
Solution Approach 1:
The patent applies composite materials to replace metal with a plastic-based composite that provides comparable strength at lower cost. The thermoplastic matrix combined with reinforcement materials (such as glass fibers or structural shapes) creates a composite with high strength-to-weight ratio that eliminates corrosion while reducing manufacturing cost through molded construction and elimination of protective coatings or anti-corrosion treatments required for metal.
4Strength
If solid plastic pallets are used, then they provide structural integrity, but they lack breathability and increase weight
Solution Approach 1:
The patent applies porous materials by incorporating voids, channels, or cellular structures within the pallet construction. These porous features reduce material usage and overall weight while maintaining structural integrity through the strategic placement of walls and support elements. The porous structure also improves breathability by allowing air circulation through the pallet, preventing moisture accumulation.
Solution Approach 2:
The patent implements segmentation by dividing the solid plastic structure into separate components or sections, such as a deck structure supported by discrete legs or stringers. This segmentation reduces material usage and weight while maintaining structural integrity through the distributed support system. The segmented design also creates spaces for breathability and reduces the amount of plastic required compared to a solid monolithic structure.
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 solution provides increased durability, reduced weight, improved breathability, and resistance to impact and corrosion, while maintaining a cost-effective and hygienic solution for supporting goods and enabling efficient use with lifting devices.
Implementation Method 1
a heat staking assembly process
Implementation Method 2
heat staking assembly process
Data Source
Figure 1~6
Figure 2
Figure 3
AI summary
The invention provides systems and methods of joining two or more pallet sections including a top deck (15) and a bottom deck (12). The top deck (15) may include a portion of pallet blocks (14) that project downwardly and include outer sleeves (24) and bosses or posts (23). The bottom deck (12) may include a portion of pallet blocks that project upwardly and include inner sleeves (44), post receiving cavities (43) and radial ribs (45), wherein the post receiving cavity (43) is coupled to the inner sleeves (44) by the plurality of radial ribs (45). The post may be inserted into the post receiving cavity to protrude through the post receiving cavity and to extend beyond a plane that is defined by bottom portions of radial ribs. During insertion of the post into the post receiving cavity, the outer sleeve is fitted over the inner sleeve. The top deck and the bottom deck may be joined together using a heat staking assembly process that includes applying heat and pressure to reform a tip portion of the post to mechanically lock the top deck and the bottom deck through the pallet blocks.