Pulp-Molded Packing Case Buffer for Impact Load Distribution
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Solution Overview
Problem
Existing buffer materials for packing cases do not effectively distribute impact loads and are prone to crushing, especially when packing large or heavy objects, leading to inadequate protection and potential damage.
Innovation Solution
A packing case unit comprising a case main body made of cardboard and a buffer material formed through pulp molding, featuring a first planar portion and a buffer portion with cylindrical and flange structures, secured using a simple fixing mechanism that includes mounting holes, covering portions, and fitting pieces to ensure stable attachment and distribution of impact loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple buffer material structure is used, then manufacturing cost is reduced, but impact resistance and buffering performance deteriorate
Solution Approach 1:
The buffer material is divided into multiple functional portions: a planar portion for distributing impact load, and multiple buffer portions with cylindrical protrusions for absorbing impact energy. This segmentation allows each portion to perform its specific function optimally, achieving both cost-effectiveness and high impact resistance through a modular design that uses simple geometric shapes.
Solution Approach 2:
Different regions of the buffer material are designed with different properties: the planar portion has a flat surface for load distribution, while the buffer portions have cylindrical protrusions for energy absorption. This local differentiation of structure and function enables the buffer material to provide comprehensive protection against impact while maintaining manufacturing simplicity.
2Reliability
If a complex buffer material structure is used, then impact resistance is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The buffer material is segmented into a planar portion and multiple buffer portions, where each segment has a simple geometric form (flat surface and cylindrical protrusions). This segmentation achieves complex buffering performance through the combination of simple elements, avoiding the need for truly complex structures while maintaining high impact resistance.
Solution Approach 2:
The buffering performance is optimized by adjusting parameters such as the number, size, and distribution of cylindrical protrusions, rather than changing the fundamental structure. This allows for tailored impact resistance for different applications while maintaining a relatively simple overall design that is easy to manufacture.
3Reliability
If buffer material is made to fit specific impact scenarios, then protection effectiveness is improved, but adaptability to different packing needs deteriorates
Solution Approach 1:
The buffer material design allows for adjustment of protection effectiveness by changing parameters such as the number, size, and arrangement of cylindrical protrusions in the buffer portions. This parametric approach enables the same basic structure to be adapted to different impact scenarios and packing needs, maintaining both effectiveness and versatility.
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
A packing case unit (2) including a case main body (2A) and a first buffer material (1). The first buffer material is formed of a pulp-molding material. The case main body includes a first buffer material mounting hole (101A, 101B), a first covering portion (103), and a first fitting hole (107, 108). To the first buffer material mounting hole, the first buffer material is inserted. The first covering portion includes a first main covering portion (104) and a first fitting piece (105, 106). The first main covering portion covers the first buffer material, by being folded. In the first fitting hole, the first fitting piece is fitted by being folded.