Dual Filament Feeder Coupling for Lighter 3D Print Heads
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Solution Overview
Problem
Conventional additive manufacturing systems with multiple extruders require separate motors and drives for each extruder, increasing the weight and size of the print head, leading to degraded performance and complexity.
Innovation Solution
A dual filament feeder assembly with a single motor and a coupling mechanism that allows selective coupling between two feeder wheels, reducing weight and size while maintaining reliability and simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate motors and drives are used for each extruder, then each extruder can be independently controlled, but the weight and size of the print head increase significantly
Solution Approach 1:
The patent combines multiple drive functions into a single motor that can selectively drive different feeder wheels. The coupling mechanism allows one motor to control multiple extruders sequentially, eliminating the need for separate motors for each extruder while maintaining independent control capability.
Solution Approach 2:
The single motor is designed with universal capability to drive different feeder wheels through the selective coupling mechanism. This multi-functional motor replaces multiple dedicated motors, reducing weight while providing the same operational flexibility for different material feeders.
2Ease of operation
If separate motors and drives are used for each extruder, then each extruder can be independently controlled, but the size of the print head increases
Solution Approach 1:
The patent merges multiple drive systems into a single motor unit with a coupling mechanism that can selectively engage different feeder wheels. This consolidation reduces the overall volume of the print head while preserving the ability to independently control different extruders through sequential engagement.
Solution Approach 2:
The single motor is designed as a universal drive unit that can serve multiple extruders through the coupling mechanism. This multi-functional design eliminates the need for multiple separate motors, thereby reducing the print head size while maintaining operational independence.
3Weight of moving object
If a single drive motor is used for multiple extruders, then the weight and size are reduced, but the complexity of the coupling mechanism increases
Solution Approach 1:
The coupling mechanism is segmented into discrete components including selectable coupling elements for each feeder wheel and a shifting member that positions the appropriate coupling element. This segmentation allows the complex function of selective coupling to be achieved through simple, modular parts rather than a complicated integrated mechanism.
Solution Approach 2:
Instead of having multiple motors that need to be coordinated, the invention inverts the approach by having a single motor with a mechanism that selectively couples to different feeder wheels. This inversion simplifies the control architecture while reducing weight.
4Weight of moving object
If a single drive motor is used for multiple extruders, then the weight and size are reduced, but the reliability may be affected due to increased complexity
Solution Approach 1:
The coupling mechanism is divided into separate, well-defined components (coupling elements for each feeder wheel, shifting member, drive shaft) that can be independently manufactured and assembled. This segmentation improves reliability by reducing the complexity of any single component and allowing for easier maintenance and fault isolation.
5Adaptability or versatility
If feeder wheels are switched by moving two separate wheels relative to the drive wheel, then filament switching is enabled, but the manufacturing complexity increases
Solution Approach 1:
The switching mechanism is segmented into discrete coupling elements for each feeder wheel and a shifting member that selectively positions the appropriate coupling element. This segmentation simplifies manufacturing compared to moving two separate wheels, as each component can be independently produced and assembled with standard tolerances.
Data Source
AI summary
A dual filament feeder assembly (110) for an additive manufacturing system (400) comprises a drive wheel (206) and a drive shaft (134) connected to the drive wheel. The dual filament feeder assembly (110) comprises a first feeder wheel (210) and a second feeder wheel (250) rotatably arranged around the drive shaft at a first side and a second side of the drive wheel (206). The dual filament feeder assembly further comprises a coupling member (270) arranged to selectively couple the drive wheel with the first feeder wheel (210) or the second feeder wheel (250). A shifting member (280) is arranged to move the coupling member between a first position and a second position. The coupling member drivably couples the drive wheel (206) with the first feeder wheel in the first position and couples the drive wheel with the second feeder wheel in the second position.