Cageless Molded IBC Assembly for Stackable Leak-Resistant Storage
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Solution Overview
Problem
Conventional intermediate bulk containers (IBCs) face issues with access difficulties due to their cuboid shape, deformation under liquid stress leading to leaks and waste, and challenges in stacking and storage due to metal cages warping or corroding, resulting in inefficiency and safety hazards.
Innovation Solution
A reusable, cageless molded container assembly with a pallet and molded container design featuring connection systems, leg supports, and buttresses that allow for secure attachment to a pallet, easy access, and efficient stacking, while minimizing stress-induced deformation and providing a self-supporting structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a cuboid shaped molded tank is used in conventional IBCs, then the tank can be manufactured with simple geometry, but access to fill openings and outlets becomes difficult when another IBC is stacked on top
Solution Approach 1:
The patent transitions from a cuboid tank shape to a cylindrical tank shape, fundamentally changing the geometric dimensionality. This cylindrical configuration allows fill openings and outlets to be positioned on the vertical sidewalls, making them accessible from the side even when stacked, thereby resolving the access difficulty while maintaining manufacturing feasibility through rotational or blow molding processes
2Device complexity
If a cuboid shaped molded tank is used, then the tank structure is simple, but the tank undergoes warping and deformation due to uneven stresses from enclosed liquids
Solution Approach 1:
The patent employs a cylindrical shape with curved surfaces instead of flat faces and sharp corners. The curved geometry distributes liquid pressure more uniformly across the tank walls, eliminating stress concentration points that cause warping and deformation in cuboid tanks. This curvature-based design maintains structural simplicity while significantly improving shape stability under liquid load
3Strength
If metal reinforcement cages are used to support molded tanks, then the tanks gain structural strength, but the metal cages can become warped or bent making stacked IBCs a collapsing hazard
Solution Approach 1:
The patent removes the metal reinforcement cage entirely from the IBC structure. The molded tank is designed to be self-supporting through its optimized cylindrical geometry and integrated pallet connection system, eliminating the need for external metal cages. This extraction of the metal component eliminates the warping and corrosion problems associated with cages while maintaining stacking strength through the tank's inherent structural design
Solution Approach 2:
The patent employs composite construction by integrating the molded tank with a wooden or composite pallet system instead of using metal cages. The tank is securely attached to the pallet through embedded fastening points, creating a composite structure that combines the advantages of molded plastic (chemical resistance, formability) with the strength and stability of wood or composite materials, thereby improving stacking safety
4Strength
If metal reinforcement cages are used, then the tanks gain structural support, but the metal cages may rust or corrode
Solution Approach 1:
The patent eliminates the metal reinforcement cage from the IBC structure, removing the source of corrosion and rust problems. The structural support function is transferred to the molded tank itself and its integration with the pallet, both of which use corrosion-resistant materials (molded plastic and wood/composite), thereby maintaining structural support while eliminating harmful corrosion effects
5Quantity of substance
If conventional IBCs with metal cages are used, then the tanks can provide enclosed liquid storage, but the molded tanks must be removed and replaced when deformed, producing waste
Solution Approach 1:
The cylindrical shape with its uniform curvature distributes stresses evenly throughout the tank structure, preventing the localized warping and deformation that occurs in cuboid tanks. This stress distribution extends the service life of the molded tank significantly, allowing it to withstand repeated filling, stacking, and transport cycles without deformation, thereby reducing waste from premature tank replacement while maintaining full liquid storage capacity
Solution Approach 2:
The patent changes the geometric parameters of the tank from a cuboid with sharp edges and flat surfaces to a cylinder with continuous curved surfaces. This parameter change fundamentally alters the stress distribution characteristics, eliminating stress concentration points and enabling the tank to withstand repeated use without deformation, thus reducing waste from frequent replacement
Data Source
AI summary
A molded container assembly including a pallet, a molded container, and a plurality of connection systems. The pallet supports the molded container thereon and includes stacking alignment structure for stacking the pallet on another molded container assembly. The molded container includes a tank portion, several leg supports, and several buttresses. The tank portion includes several curved sidewalls and a fill opening. The leg supports include lower sections and upper sections that extend above the fill opening for spacing a pallet stacked on top of the molded container above the fill opening. The upper sections include pallet engaging structure for engaging pallets of at least two different types. The buttresses extend between the tank portion and the leg supports. The connection systems include washers that allow for shrinkage and expansion between the molded container and the pallet in a number of directions.