Helical Driver Filament Pressure Distribution
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Solution Overview
Problem
Existing 3D extrusion devices are large, expensive, and require complex computer files for operation, limiting their versatility and ability to handle a wide range of filament materials in terms of hardness, toughness, and strength.
Innovation Solution
The extrusion device applies distributed driving pressure around the circumference of the filament, eliminating the need for a pressure component against the filament, increasing pressure application, improving filament control, and allowing the use of a broader range of materials with a single filament driver by using a motor-driven driver with a helical thread that engages the filament along a helical path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a pressure component is used to apply driving pressure to the filament, then the filament can be urged against the filament driver, but the device complexity increases and the filament control is reduced
Solution Approach 1:
The patent removes the separate pressure component from the system by integrating the pressure application function directly into the rotating driver. The driver's rotation itself generates the driving pressure through its engagement with the filament, eliminating the need for additional pressure-applying mechanisms and reducing overall device complexity.
Solution Approach 2:
The patent combines the functions of filament engagement and pressure application into a single rotating driver component. The driver simultaneously grips the filament and applies driving pressure through its rotational motion, merging multiple functions into one element to simplify the device structure.
2Force
If a pressure component is used to apply driving pressure to the filament, then the filament can be urged against the filament driver, but the amount of driving pressure that can be applied is limited
Solution Approach 1:
The patent transitions from static pressure application to dynamic pressure generation. The rotating driver creates variable driving pressure through its rotational motion, allowing the pressure to be dynamically adjusted based on rotation speed and engagement force, thereby increasing the amount of driving pressure that can be applied without adding complex pressure control mechanisms.
3Device complexity
If a single filament driver is used, then the device structure is simplified, but the ability to handle a wide range of filament materials is reduced
Solution Approach 1:
The patent enables a single filament driver to handle diverse filament materials by allowing dynamic adjustment of operational parameters such as rotation speed, engagement force, and driver geometry. These parameter changes adapt the driver's characteristics to match the specific requirements of different filament types, maintaining material compatibility without increasing device 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
This solution enables more efficient and controlled extrusion of a wider range of filament materials, reducing device size and cost while improving operational simplicity and material compatibility.
Implementation Method 1
a driver operatively coupled with the motor such that the driver is rotated about an axis by operation of the motor... the driver comprising a filament-engaging member positioned in the passage and configured to engage a filament extending through the passage such that rotation of the driver moves the filament relative to the driver
Implementation Method 2
a heater configured to melt the filament and disposed between the driver and the outlet to receive the filament from the driver
Data Source
AI summary
An extrusion device can include a driver operatively coupled with a motor such that the driver is rotated about an axis by operation of the motor. The driver can have a passage positioned such that the axis extends through the passage. The driver can have a filament-engaging member positioned in the passage and configured to engage a filament extending through the passage such that rotation of the driver moves the filament relative to the driver. The driver can be positioned such that a first direction of rotation of the driver urges the filament along the axis toward an outlet. A heater can be configured to melt the filament and can be disposed between the driver and the outlet to receive the filament from the driver.