Interference-Fit Casing and Cover Joint for Food Housing Elements
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Solution Overview
Problem
Existing housing elements for food applications face challenges in securing casings made of stainless steel and covers made of composite materials, particularly in ensuring a reliable and stable seal during processing operations, as existing solutions often fail to provide a consistent and secure interference-fit joint across different materials and operational conditions.
Innovation Solution
A housing element system featuring a stainless steel casing with symmetrical T-shaped grooves and a composite material cover with matching steps, ensuring an interference-fit joint that allows for secure closure in both directions of rotation, utilizing an interference-fit joint with specific dimensional tolerances and a connecting radius to prevent jamming and ensure stability, applicable to both closed and open configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an interference-fit joint is used to secure the cover to the casing, then the reliability of the seal is improved, but the difficulty of assembly increases due to material incompatibility between stainless steel and composite materials
Solution Approach 1:
The patent introduces an intermediate element (the T-shaped groove and step configuration) that mediates between the stainless steel casing and composite material cover. This intermediate geometric feature enables the interference-fit joint to work effectively across different materials by providing a standardized interface that accommodates material property differences, thus maintaining seal reliability while improving assembly ease.
2Reliability
If the cover is designed to close in a specific direction to ensure proper sealing, then the seal reliability is improved, but the device complexity increases due to directional constraints
Solution Approach 1:
The patent employs asymmetric T-shaped grooves and corresponding steps that are geometrically designed to permit closure in both directions. The asymmetric geometry of the T-shape allows the step to engage the groove properly regardless of rotation direction, thereby maintaining seal reliability while eliminating directional constraints and reducing device complexity.
3Strength
If the grooves are made with tight tolerances to ensure a secure interference-fit joint, then the strength of the connection is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent optimizes the geometric parameters of the T-shaped groove and step features to achieve an interference-fit joint that provides strong connections without requiring extremely tight tolerances. By carefully selecting the dimensions and shapes of these features, the design achieves adequate connection strength while remaining manufacturable with standard precision capabilities.
Data Source
AI summary
A housing element for food applications having a casing made of metallic material and a cover made of composite material and having a bottom surface which is closed or provided with a through-hole. The housing element is provided with a system for securing the cover on the casing, comprising at least two steps which are formed on the cover and which engage with interference inside at least two corresponding grooves formed on the casing.