Dual Printhead Assembly with Rotating Swing Arm for Height Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional dual printhead assemblies for FDM 3D printing face challenges in easy installation and adjustment, mutual height difference management, and efficient nozzle switching, leading to operational inefficiencies and material waste.
Innovation Solution
A dual printhead assembly with a base, printhead module, and switching module, featuring a positioning swing arm and rotating cams, allows for easy installation, adjustable height difference, and automatic nozzle switching without additional driving sources, using an elastic sheet to prevent material overflow during cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two single printhead sets are simply jointed together in a conventional dual printhead assembly, then the structure is simple, but the installation and adjustment become difficult due to height alignment requirements
Solution Approach 1:
A positioning swing arm is introduced as an intermediary component between the two single printhead sets. The swing arm includes a first connection element connected to the first single printhead set and a second connection element connected to the second single printhead set, serving as a mediator that enables flexible height adjustment and eliminates the need for precise height alignment during installation
Solution Approach 2:
The positioning swing arm is designed to be rotatable, transforming the static height alignment requirement into a dynamic adjustment mechanism. By rotating the swing arm, the height difference between the two single printhead sets can be adjusted flexibly, allowing easy installation and operation
2Stability of the object's composition
If the dual printhead assembly uses fixed mutual heights for both single printhead sets, then the structure is stable, but operational efficiency decreases when nozzle switching is required
Solution Approach 1:
The positioning swing arm is designed to be rotatable, transforming the static height alignment requirement into a dynamic adjustment mechanism. By rotating the swing arm, the height difference between the two single printhead sets can be adjusted flexibly, allowing easy installation and operation
Solution Approach 2:
The height difference parameter between the two single printhead sets is made adjustable through the rotatable positioning swing arm. This allows the system to change the height parameter dynamically based on operational requirements, improving productivity when nozzle switching is needed
3Adaptability or versatility
If one single printhead set is switched from non-use to executable status, then material variety increases, but material waste increases due to cooling requirements
Solution Approach 1:
The positioning swing arm is rotated in advance to adjust the height difference and position the non-use single printhead set to a lower height before material switching occurs. This preliminary action prevents hot material from overflowing during the cooling process, reducing material waste
Solution Approach 2:
By adjusting the height difference through the positioning swing arm before switching occurs, the system preemptively counteracts the potential harmful effect of material overflow during cooling, preventing material waste before it happens
Data Source
AI summary
The disclosure relates to a dual printhead assembly and a 3D printing apparatus. The dual printhead assembly includes a base, a printhead module and a switching module. The printhead module includes a positioning swing arm with a bearing disposed at the middle portion thereof, a first printhead unit and a second printhead unit fixed nearby two opposite edges of the bearing, respectively, and a fixing piece passing through the bearing to assemble the printhead module on the base. While a rotation shaft of the switching module is rotated to drive a first cam or a second cam to press an end or another end of an elastic sheet, a third or fourth connecting element disposed on the elastic sheet is driven to press an end or another end of the positioning swing arm, so as to adjust the height difference between the first printhead unit and the second printhead unit.