Parallel 3D Printing Stations with External Paste Reservoirs
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Solution Overview
Problem
Existing extrusion-based additive manufacturing methods for producing three-dimensional structures are inefficient and slow, making them unsuitable for mass production, particularly for porous structures, which requires improving the printing process to increase output while minimizing costs.
Innovation Solution
A system with multiple printing stations in a confined space, where each station has a detachable carrier and a deposition unit with nozzles for dispensing build material paste, coupled to a reservoir unit placed outside the printing area, allowing for parallel printing and easy replacement of paste reservoirs without interrupting the printing process, enhancing efficiency and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If reservoirs are placed on or adjacent the deposition head, then material supply is direct, but replacement requires access to the deposition head and risks interaction with printed structures
Solution Approach 1:
The reservoirs are extracted from the confined printing space and placed in an external reservoir storage area. This separation allows reservoir replacement to be performed externally without accessing the deposition head or interfering with printed structures on the carrier, thereby eliminating the risk of interaction while maintaining material supply functionality.
Solution Approach 2:
A conduit system acts as an intermediary between the externally placed reservoirs and the deposition head inside the confined space. This mediator allows material to be supplied from the external reservoir location to the internal deposition point without requiring physical access to the deposition head for reservoir replacement.
2Productivity
If multiple printing stations operate in parallel, then output increases, but system complexity and space requirements increase
Solution Approach 1:
Multiple printing stations are merged into a single confined printing space, allowing parallel printing operations to occur simultaneously in close proximity. This consolidation increases productivity by enabling multiple carriers to be printed on at the same time while containing the system complexity within a compact, integrated structure rather than requiring separate distributed systems.
Solution Approach 2:
The system utilizes vertical stacking of multiple carriers on printing stations within the confined space, transitioning from horizontal expansion to vertical utilization. This dimensional change allows multiple printing operations to occur in parallel without proportionally increasing the horizontal footprint or overall system complexity.
3Ease of repair
If printing process is interrupted for reservoir replacement, then reservoirs can be replaced, but downtime increases and efficiency decreases
Solution Approach 1:
The reservoir replacement operation is extracted from the printing process by placing reservoirs in an external storage area accessible without interrupting the printing operation. This allows reservoirs to be prepared and replaced externally while the printing process continues uninterrupted inside the confined space, eliminating downtime associated with reservoir replacement.
Solution Approach 2:
The printing process maintains continuous operation by decoupling the reservoir supply function from the printing operation. External reservoir placement and replacement can occur while the deposition head continues to print without interruption, ensuring the useful action of printing remains continuous while allowing maintenance operations to proceed separately.
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 enables continuous and safer printing with improved efficiency by allowing for the easy replacement of paste reservoirs outside the printing area, reducing downtime and increasing output, thus addressing the inefficiencies of traditional methods.
Implementation Method 1
A build material (e.g. a viscous paste, a meltable polymer, a hydrogel, etc.) is extruded through a nozzle in the form of filaments
Data Source
AI summary
A system and method for manufacturing three-dimensional structures is provided. The system comprises a plurality of printing stations for performing parallel printing in an confined space enclosed by a housing, wherein each printing station comprises a carrier, a deposition unit with at least one nozzle arranged for dispensing filaments of build material paste through an opening area thereof and a station controller configured to operate the deposition unit for deposition of filaments of a build material paste on the carrier in an interconnected arrangement in a plurality of stacked layers in order to form one or more three-dimensional structures, the at least one nozzle and the detachable carrier being relatively moveable with respect to each other, wherein the deposition unit is coupled to a reservoir unit configured to house the build material paste, wherein the reservoir unit includes at least one reservoir arranged outside of the confined space.