3D Printer Build Material Recycling System
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Solution Overview
Problem
3D printers often waste build material during the creation of 3D objects due to spilled or non-solidified material, which is not efficiently recovered and reused in subsequent processes.
Innovation Solution
A build material recycling system that includes a pneumatic transport system and a recycling device with a fluidizing membrane to recover and recondition unused build material, allowing it to be reused in ongoing or subsequent build processes by separating it from gas and contaminants and adjusting its properties for optimal use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If build material is supplied in excess to ensure complete coverage during 3D printing, then manufacturing precision is improved, but loss of substance increases due to spilled and non-solidified material
Solution Approach 1:
The patent implements a recovery system that collects unused build material from the build chamber using a vacuum source, transports it through pneumatic conduits to a separation device, and returns it to the material supply. This recovers material that would otherwise be discarded, directly reducing substance loss while maintaining build quality.
Solution Approach 2:
The system establishes a feedback loop where unused material is continuously monitored, collected, and returned to the supply reservoir. This closed-loop approach ensures that material is not wasted but fed back into the system for reuse, balancing precision requirements with material conservation.
2Loss of substance
If build material is recovered and reused in subsequent build processes, then loss of substance is reduced, but device complexity increases due to additional recycling equipment
Solution Approach 1:
The vacuum system serves multiple functions: it removes unused material from the build chamber, transports it through the pneumatic system, and enables separation and return of recyclable material. This multi-functionality reduces the need for separate dedicated components, managing device complexity while achieving material recovery.
Solution Approach 2:
The patent uses pneumatic transport with controlled pressure differentials to move material through the recycling system. By utilizing gas pressure control rather than mechanical pumping for transport, the system achieves efficient material movement with simpler components, balancing recovery capability with system complexity.
3Productivity
If pneumatic pressure is increased to improve material transport speed, then productivity increases, but loss of energy increases due to higher compression requirements
Solution Approach 1:
The vacuum system operates in periodic cycles, creating pressure differentials only when material needs to be transported. This intermittent operation rather than continuous high-pressure maintenance reduces energy consumption while still achieving the necessary transport speed when required, balancing productivity with energy efficiency.
Solution Approach 2:
The patent replaces mechanical material handling systems with pneumatic transport. By using controlled pressure differentials and vacuum forces rather than mechanical conveyors or pumps, the system achieves efficient material movement with potentially lower energy input, as the pressure differential can be maintained passively when not in active transport mode.
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 system effectively recovers and reconditions non-solidified build material, enhancing recycling efficiency and enabling its reuse in 3D printing processes, thereby reducing material waste and improving the sustainability of the printing process.
Implementation Method 1
A pneumatic transport system can be connected to the build area
Implementation Method 2
reconditioning the separated build material by percolating conditioned gas through the non-solidified build material via a fluidizing membrane
Implementation Method 3
reconditioning the separated build material by percolating conditioned gas through the non-solidified build material via a fluidizing membrane
Data Source
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AI summary
In some examples, a build material recycling system of a three-dimensional (3D) printer can include a build material transport system of the 3D printer, a build material recycling device of the 3D printer that includes a fluidizing membrane and is connected to the build material transport system, and a recycled build material hopper of the 3D printer connected, via the build material transport system, to the build material recycling device.