Filament Winding Trailing End Fastening
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Solution Overview
Problem
The existing filament winding methods for gas tanks, such as twisting fibers around a mouthpiece or using resin clips, are cumbersome and time-consuming for fastening the trailing ends of fibers, especially when dealing with a large number of fibers.
Innovation Solution
The method involves a helical winding process where fibers are wound around a tank with a trunk portion and domed portions, using a helical winding head with multiple yarn-feeding sections, and then using a hoop winding head to cut and fasten the trailing ends simultaneously, simplifying the fastening process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the multi-yarn feeding method is used for helical winding, then the winding speed and productivity are significantly improved, but the operation to fasten the trailing ends of a large number of fibers becomes more complex and time-consuming
Solution Approach 1:
The patent merges the fastening operations for all trailing ends into a single integrated step by using hoop winding to simultaneously fasten all trailing ends of the large number of fibers to the tank body, eliminating the need for individual fastening operations and significantly reducing the complexity and time of the fastening process
Solution Approach 2:
The hoop winding process automatically performs the fastening function as part of its normal winding operation, where the hoop winding layers themselves serve to fasten the trailing ends without requiring separate fastening devices or operations, making the system self-sufficient
2Reliability
If fibers are twisted around mouthpieces for fastening, then the trailing ends are secured, but the mouthpiece length must be increased and additional fastening steps are required
Solution Approach 1:
The patent extracts the fastening function from the mouthpiece structure and the twisting operation, instead integrating it into the hoop winding process where the winding layers themselves perform the fastening, thereby simplifying the overall device structure and reducing the number of required components
Solution Approach 2:
The hoop winding layers serve multiple functions simultaneously: they form the structural reinforcement of the tank and at the same time fasten all trailing ends of the fibers to the tank body, eliminating the need for separate fastening mechanisms and reducing device complexity
Data Source
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Figure 3A
AI summary
In a filament winding method, while a rotating tank (2) relatively reciprocates in a tank axial direction to a helical winding head (12), fibers are fed from each yarn-feeding section (31) to the tank. After the tank finally turns back in the tank axial direction, a large number of fibers are wound around one domed portion (202) and a trunk portion (201) of the tank, trailing ends of the large number of fibers are located at either one end portion of the trunk portion. Then a piece or a small number of fibers are fed from a rotating hoop winding head to the trunk portion (201), and hoop winding is performed on helical winding layers formed around the trunk portion. Then, at the end portion of the trunk portion, the large number of fibers pulled from the yarn-feeding sections of the helical winding head are cut off.