Tank Closure Assembly Segmentation for Leak-Tight Sealing
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Solution Overview
Problem
Existing tank closure assemblies for vehicle accessory tanks face manufacturing difficulties due to internal threads and undercuts, leading to production inaccuracies and potential leaks.
Innovation Solution
A multi-part tank closure assembly design featuring an insert element with internal threads for attachment to the filler neck, allowing the closing body to have a smooth internal contour and eliminating the need for complex moulds, with a receptacle formed between the insert element and the closing body to house a sealing element for leak-tight sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the closing body is produced as an injection moulding with internal thread and receptacle, then the structure is integrated and simple in design, but the manufacturing is difficult due to undercuts requiring split moulds leading to mould separation edges and production inaccuracies
Solution Approach 1:
The closing body is divided into two separate parts: the closing body itself and an insert element. The insert element contains the internal thread and receptacle, while the closing body has a smooth internal contour. This segmentation eliminates the need for complex split moulds and mould separation edges, thereby improving manufacturing precision while maintaining structural integration through assembly.
2Device complexity
If the closing body is produced as an injection moulding with internal thread and receptacle, then the structure is integrated and simple in design, but the manufacturing process becomes more complex requiring split moulds
Solution Approach 1:
The closing body is divided into two separate parts: the closing body itself and an insert element. The insert element contains the internal thread and receptacle, while the closing body has a smooth internal contour. This segmentation eliminates the need for complex split moulds and mould separation edges, thereby improving manufacturing precision while maintaining structural integration through assembly.
3Device complexity
If the closing body is produced as an injection moulding with internal thread and receptacle, then the structure is integrated, but production inaccuracies occur leading to potential leaks
Solution Approach 1:
The closing body is divided into two separate parts: the closing body itself and an insert element. The insert element contains the internal thread and receptacle, while the closing body has a smooth internal contour. This segmentation eliminates the need for complex split moulds and mould separation edges, thereby improving manufacturing precision while maintaining structural integration through assembly.
Data Source
AI summary
A tank closure assembly for closing the filler neck of a vehicle tank, the tank closure assembly having a closing body of cap-like design which can be screwed onto the filler neck and which has a receptacle for a sealing element in order to seal off an annular gap between the filler neck and the closing body. An insert element is introduced into the closing body through an open underside thereof and is attached in the closing body, the insert element carrying one or more internal threads via which the closing body can be fixed to the filler neck. The receptacle is formed between the insert element and the top side of the closing body.