Resin Liner Insert Ring Communication Holes Sealability
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Solution Overview
Problem
High-pressure tanks face issues with non-uniform resin thickness and insert ring displacement due to resin flow during molding, leading to inadequate sealability between the mouth portion and ferrule member.
Innovation Solution
Incorporating a cylindrical insert ring with communication holes between the inner and outer peripheral sides during resin liner molding ensures uniform resin charging, preventing insert ring displacement and maintaining center alignment, thus ensuring sufficient sealability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insert ring is insert-molded within the mouth portion at the time of molding the resin liner, then the sealability between the mouth portion and ferrule member is improved, but the insert ring may be fixed in an off-center state due to non-uniform resin charging, thereby worsening the manufacturing precision
Solution Approach 1:
The insert ring is divided into multiple segments with communication holes between them, allowing resin to flow through and equalize pressure distribution during molding. This segmentation prevents non-uniform resin charging that would cause off-center positioning, while still maintaining the overall sealing function of the insert ring structure.
Solution Approach 2:
Communication holes act as intermediary channels that allow resin to pass through the insert ring structure. This intermediary pathway enables uniform resin distribution and pressure equalization, preventing the insert ring from being displaced to an off-center position during the molding process.
2Ease of manufacture
If the thickness of resin between the insert ring and mouth portion is non-uniform, then the molding process is simpler, but the liner deformation occurs due to reaction force of the O-ring, thereby worsening the sealability
Solution Approach 1:
The insert ring is segmented with communication holes that allow resin to flow through and distribute uniformly. This segmentation structure enables the resin to reach all areas evenly, creating uniform thickness throughout the liner while maintaining ease of molding through the insert-molding process.
Solution Approach 2:
The communication holes change the resin flow parameters during molding, allowing pressure and flow distribution to be optimized. This parameter change ensures uniform resin thickness is achieved without complicating the molding process, as the holes are integrated into the insert ring design.
Data Source
AI summary
The present invention provides a tank including an O-ring 34 between a cylindrical mouth portion 18, which is formed in a resin liner 12 forming a tank body which is to be filled with gas, and a ferrule member 20 which is mounted on an inner peripheral side of the mouth portion 18. An insert ring 36 which is insert-molded at the time of molding the resin liner 12 is provided within the mouth portion 18. The insert ring 36 includes a plurality of communication holes 38 which communicate between the inner peripheral side and an outer peripheral side thereof.