Bulk Bag Midbody Pinch Design for Bulge Reduction
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Solution Overview
Problem
Conventional bulk bags bulge out due to their flexible nature when filled, leading to increased shipping costs, instability, and damage risks due to overhanging portions, and existing solutions like baffled bags are costly and inefficient.
Innovation Solution
A bulk bag design with a varying circumference, achieved by sewing pinches along the sides to reduce bulging, where the circumference is minimized at the middle section, eliminating the need for baffles and reducing material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional bulk bags with square or rectangular walls are used, then the bag can be easily manufactured, but the bag bulges out severely when filled, increasing shipping costs and reducing stability
Solution Approach 1:
The patent applies asymmetry by giving the bulk bag a non-uniform circumference along its height. The midbody circumference is deliberately reduced to be less than the top and bottom circumferences, creating an asymmetric shape that counteracts the natural bulging tendency. This asymmetric design allows the bag to maintain stability when filled without requiring complex manufacturing processes.
Solution Approach 2:
The patent changes the geometric parameter of the bag by reducing the midbody circumference relative to the top and bottom circumferences. This parameter modification (creating a pinched midbody section) fundamentally alters how the bag responds to internal pressure and gravity, preventing bulging and improving stability while maintaining ease of manufacture.
2Stability of the object's composition
If baffles are added inside the bag to reduce bulging, then the bag stability improves, but the manufacturing cost and complexity increase significantly
Solution Approach 1:
The patent extracts the bulge-reducing function from the internal structure (baffles) and relocates it to the external geometry of the bag itself. By reducing the midbody circumference in the bag's overall shape, the invention eliminates the need for internal baffles while achieving the same stability effect, thereby reducing device complexity.
Solution Approach 2:
Instead of adding internal elements (baffles) to control bulging, the patent inverts the approach by modifying the external shape to prevent bulging from occurring. The solution moves from internal reinforcement to external geometric design, simplifying the overall structure.
3Shape
If the bag circumference is reduced at the midbody section, then the bulging is reduced and stability improves, but the manufacturing process becomes more complex
Solution Approach 1:
The patent segments the bag's side wall into three distinct sections with different circumferences: top section, midbody section (with reduced circumference), and bottom section. This segmentation is achieved by adding reinforcement stitches at specific locations, which divides the manufacturing process into manageable stages while achieving the desired shape control.
Data Source
AI summary
A bulk bag includes a bulk bag body that is configured to have a varying circumference with a reduced circumference between the top and bottom of the bulk bag body to reduce bulging when the bulk bag body is filled with content.