3D Printing Twisting Adjustment for Fiber Bundle Deformation
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Solution Overview
Problem
Three-dimensional printing apparatuses using fiber-reinforced filaments face deformation issues due to fiber twisting, especially when creating curved structures, leading to unintended shape distortions.
Innovation Solution
Incorporating a twisting adjustment unit that allows for controlled twisting of the fiber bundle based on the design shape, with mechanisms to adjust and eliminate twisting, ensuring accurate filament alignment and minimizing deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the filament is disposed so as to be curved to mold curved portions, then the ability to create complex three-dimensional structures is improved, but twisting gradually occurs in the filament causing deformation
Solution Approach 1:
The patent applies preliminary anti-action by introducing a twisting mechanism that pre-twists the fiber bundle in the opposite direction of the expected twisting when the filament is curved. This pre-applied counter-twisting force compensates for the deformation that would otherwise occur during the molding process, allowing the filament to maintain its intended shape even when disposed in curved configurations.
Solution Approach 2:
The patent implements dynamics by making the twisting mechanism adjustable and controllable during the molding process. The system can dynamically adjust the degree of twisting based on the specific curvature requirements of different portions of the three-dimensional structure being created, allowing optimal compensation for twisting in real-time as the filament is deposited in various configurations.
2Manufacturing precision
If fiber bundle is twisted to compensate for curvature, then filament deformation is suppressed, but the device complexity increases due to additional twisting mechanism
Solution Approach 1:
The patent applies universality by designing the twisting mechanism to serve multiple functions: it can twist the fiber bundle to compensate for curvature, it can control the degree of twisting for different sections, and it can be integrated with the existing filament feeding and deposition system. This multi-functionality reduces the need for separate compensation mechanisms and minimizes overall system complexity while achieving the goal of suppressing filament deformation.
3Stability of the object's composition
If the fiber bundle is twisted before impregnation, then the filament maintains its shape better during ejection, but the impregnation process complexity increases
Solution Approach 1:
The patent applies preliminary action by twisting the fiber bundle before it undergoes resin impregnation. This pre-twisting is performed on the dry fiber bundle, and then the twisted bundle is fed into the impregnation system. By completing the twisting operation before impregnation, the system maintains filament shape stability during ejection while avoiding the need to modify the impregnation process itself, thus minimizing impregnation process complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses filament deformation by adjusting twisting according to curvature, enabling the creation of designed three-dimensional structures without distortion and eliminating accumulated twisting within the printing apparatus.
Implementation Method 1
a heater built in the pressing means
Implementation Method 2
melting a resin filament by heat melting
Implementation Method 3
the fiber bundle twisting mechanism twists the fiber bundle by turning a fiber bundle bobbin around which the fiber bundle to be supplied to the impregnation means is wound
Data Source
AI summary
A three-dimensional printing apparatus (1) allowing a linear filament (F) in which a fiber bundle (C) is impregnated with resin (P) to be continuously ejected includes twisting means (6) for allowing a total amount of twisting of the filament (F) or an amount of twisting of the fiber bundle (C) to be changed.