Spring-Biased 3D Printer Extruder and Automatic Tool Crib
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Solution Overview
Problem
There is a need for improved printing tools and systems in three-dimensional printers, particularly for efficient extrusion and tool management, including automatic tool changing and maintenance, to enhance printing accuracy and efficiency.
Innovation Solution
The development of a modular extruder system that can be slidably mounted and automatically coupled to a three-dimensional printer, featuring a spring-biased mechanism for precise movement and a tool crib system for managing multiple tool heads, which allows for automatic tool changes and maintenance, such as detecting clogged extruders and preheating tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual tool head replacement is used, then device complexity is reduced, but productivity decreases due to manual intervention time
Solution Approach 1:
The system performs automatic tool head replacement and maintenance operations without human intervention. The robotic system autonomously selects, retrieves, and installs appropriate tool heads based on detected conditions or print job requirements, enabling the system to service itself and eliminating manual replacement time
Solution Approach 2:
The tool crib pre-heats tool heads before they are needed for printing operations. This preliminary preparation ensures that tool heads are ready for immediate use at the correct temperature, eliminating warm-up time during actual printing and improving overall productivity
2Manufacturing precision
If tool heads are always in contact with build surface, then printing accuracy is maintained, but device complexity increases due to constant positioning control
Solution Approach 1:
The system replaces complex continuous positioning control with a simpler spring-biased mechanical system. The spring automatically maintains the tool head at the correct height above or in contact with the build surface, eliminating the need for complex active positioning control while preserving printing accuracy
3Adaptability or versatility
If single tool head is used, then device complexity is reduced, but adaptability decreases for different printing tasks
Solution Approach 1:
The tool crib system serves multiple functions: storing various tool heads, pre-heating them, detecting their presence and type, and automatically selecting appropriate tools for different printing tasks. This universal system handles diverse tool types and operations through a single integrated platform
Solution Approach 2:
The system uses sensors to detect tool head presence, type, and condition (such as clogging). This feedback information is used by the controller to automatically select appropriate tool heads from the crib and replace them as needed, enabling adaptive tool management without human intervention
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 improved precision and efficiency in three-dimensional printing by allowing for automatic tool management, reducing downtime and improving the quality of printed objects through precise extrusion control and easy maintenance.
Implementation Method 1
The extruder may be spring-biased against the forward feedpath so that the extruder remains above the build surface in the absence of applied forces, and then moves downward into a position for extrusion when build material is fed into the extruder.
Data Source
AI summary
An extruder or other similar tool head of a three-dimensional printer is slidably mounted along a feedpath of build material so that the extruder can move into and out of contact with a build surface according to whether build material is being extruded. The extruder may be spring-biased against the forward feedpath so that the extruder remains above the build surface in the absence of applied forces, and then moves downward into a position for extrusion when build material is fed into the extruder. In another aspect, modular tool heads are disclosed that can be automatically coupled to and removed from the three-dimensional printer by a suitable robotics system. A tool crib may be provided to store multiple tool heads while not in use.