Plastic Container Double-Walled Corner Cavities
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Solution Overview
Problem
Existing plastic containers with reinforced corner portions face issues with impact resistance and hygiene during use, as well as tool wear and efficiency in the injection molding process.
Innovation Solution
The design features double-walled corner portions with continuous cavities and ribs, allowing for enhanced impact resistance, improved tool longevity, and efficient cleaning by ensuring water can flow out completely during washing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If corner portions are reinforced with solid structure, then impact resistance is improved, but tool wear increases and cleaning efficiency deteriorates
Solution Approach 1:
The corner portions are designed with a hollow internal structure instead of solid reinforcement, creating a porous-like cavity system that reduces material usage and tool wear while maintaining structural strength through the hollow configuration
Solution Approach 2:
The reinforcement is achieved by extending the wall thickness to create a hollow three-dimensional structure, transforming from two-dimensional surface reinforcement to three-dimensional volumetric reinforcement that provides superior impact resistance with reduced material
2Stability of the object's composition
If corner portions have closed or slit-shaped openings, then structural integrity is improved, but cleaning efficiency deteriorates due to water retention
Solution Approach 1:
The hollow corner portions are designed with continuous openings at both top and bottom ends, allowing water to flow continuously through the entire structure during cleaning, eliminating water retention while maintaining structural integrity through the hollow configuration
Solution Approach 2:
Instead of having small slit-shaped openings at the top as in prior art, the invention inverts the approach by providing large continuous openings at both top and bottom ends, enabling complete water drainage and significantly improving cleaning efficiency
3Strength
If corner portions are reinforced with traditional solid design, then impact resistance is improved, but manufacturing precision deteriorates due to molding complexity
Solution Approach 1:
The corner portions are segmented into hollow sections with internal cavities, allowing the molding process to create complex three-dimensional structures in a single step while maintaining precise dimensions and reducing the need for post-processing
Solution Approach 2:
The hollow structure and internal ribs are formed directly during the injection molding process itself, preliminarily creating the final reinforced structure without requiring additional machining or assembly steps, thereby maintaining high manufacturing precision
Data Source
AI summary
A plastic container (1) with a base (2) and mutually opposite side walls (3, 4) has reinforced corner portions (5) at each of its corners on the outside. The corner portions (5) are of double-walled design, an outer wall (6) extending upwards on the outside in each case from the level of the base (2) over part of the height of the side walls (3, 4). The double-walled corner portions (5) have cavities (7), which extend continuously from top to bottom and are subdivided by one or more ribs (8, 8′). The corner portions (5) formed with the continuous cavities (7) provide advantages in production by injection moulding, the core tools achieving a longer service life thanks to better heat dissipation. When the plastic containers (1) according to the invention are being cleaned with water, the continuous cavities (7) allow more hygienic cleaning, the water being able to drain out without any residues being left behind.