Fiber Placement Delivery Control for Direction Changes
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Solution Overview
Problem
Existing shaping apparatuses face a decrease in strength of continuous fiber materials when changing the application direction, leading to uneven delivery amounts across the width of the shaping material, which affects the shaping process.
Innovation Solution
A shaping apparatus with a delivery unit that adjusts the delivery amount of continuous fibers between the inner and outer sides of the path based on differences in path lengths, using a control unit to manage the rotation speeds of drawing rollers and adjust the supply amount of shaping material according to shape data, ensuring consistent fiber distribution during direction changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the applying direction of shaping material is changed, then the shaping process can accommodate complex geometries, but the delivery amount becomes uneven between inner and outer sides of the path
Solution Approach 1:
The patent applies local quality by adjusting the delivery amount of shaping material specifically at different locations (inner side vs outer side) of the winding path. The delivery unit varies the amount of continuous fibers delivered according to the local path length requirements, ensuring that regions requiring more material (outer side with longer path) receive accordingly, while maintaining uniform fiber distribution across the width at each location.
Solution Approach 2:
The patent implements dynamics by making the delivery amount adjustable and variable during the shaping process. The delivery unit dynamically changes the delivery amount between inner and outer sides based on real-time path length differences, allowing the system to adapt to changing geometric requirements as the applying direction changes, rather than using a fixed delivery rate.
2Device complexity
If the delivery amount is kept constant in width direction, then the delivery control is simplified, but the strength of continuous fibers decreases when changing applying direction
Solution Approach 1:
The patent applies parameter changes by modifying the delivery amount parameter of continuous fibers based on the path length differences between inner and outer sides. When the applying direction changes, the system adjusts the delivery amount parameter dynamically to compensate for path length variations, ensuring sufficient fiber strength is maintained in regions with longer paths while preventing fiber deficiency in critical areas.
3Manufacturing precision
If the delivery amount varies across width, then fiber distribution becomes non-uniform, but this is necessary to compensate for path length differences
Solution Approach 1:
The patent resolves this contradiction by implementing local quality control where the delivery amount is specifically adjusted at inner and outer sides based on their respective path length requirements. The system delivers varying quantities of fibers locally to compensate for path length differences, while maintaining uniform fiber distribution within each local region, thus achieving both compensation and uniformity through location-specific delivery control.
Data Source
AI summary
Provided is a shaping apparatus including: a stage; and a delivery unit configured to: deliver and apply a shaping material in which continuous fibers is impregnated with a resin onto the stage; and, configured to change delivery amounts between an inner side and an outer side of a path of the shaping material according to a difference in path lengths between the inner side and the outer side, the difference being generated when an applying direction of the shaping material is changed.