Sealable Cartridge with Soot Confinement for Additive Manufacturing
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Solution Overview
Problem
Current additive manufacturing systems face challenges such as lengthy cleaning and servicing processes, loss of inert gases, and difficulties in maintaining temperature control and air purity during and after printing, which reduce throughput and affect material properties.
Innovation Solution
The introduction of a cartridge system for additive manufacturing, featuring a sealable chamber with a powder hopper and spreader, includes soot confinement mechanisms and dosing mechanisms for precise powder deposition, enabling quick material changes and minimizing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual cleaning and servicing of the print chamber is performed, then purity of print powder is ensured, but significant time is lost and throughput is reduced
Solution Approach 1:
The system is divided into a reusable print chamber and disposable cartridges containing all components that contact powder (hopper, spreader, build plate). This segmentation allows the chamber to be reused without cleaning while maintaining powder purity through replacement of contaminated cartridge components.
Solution Approach 2:
The problematic components (hopper, spreader, build plate) are extracted from the permanent chamber and placed into removable cartridges. This extraction enables these components to be discarded or quickly replaced without affecting the chamber itself, eliminating lengthy cleaning procedures.
2Ease of operation
If the print chamber is opened to atmospheric air for cleaning, then access for servicing is enabled, but expensive inert gases are lost and evacuation time is required
Solution Approach 1:
The components requiring servicing are extracted into removable cartridges that can be replaced without opening the chamber to atmospheric air. The chamber remains sealed and pressurized with inert gas throughout the cartridge replacement process.
Solution Approach 2:
A sealed cartridge interface acts as an intermediary between the inert gas environment and the external environment. Cartridges can be loaded and replaced through sealed ports, allowing servicing without breaking the inert atmosphere seal.
3Ease of manufacture
If 3D prints are removed from the print chamber for post-processing, then heat treatment can be applied, but temperature control is lost and material properties are affected
Solution Approach 1:
The cartridge serves as a sealed intermediary environment that maintains controlled conditions (inert gas, temperature) between the print chamber and post-processing equipment. Prints can be transferred through sealed interfaces without exposure to uncontrolled atmospheric conditions.
4Reliability
If prints remain in the print chamber for hours after printing to cool down, then material properties are preserved, but the chamber is tied up and cannot start new print jobs
Solution Approach 1:
The system separates the cooling function from the main chamber by providing temperature-controlled cartridge storage. Cartridges can be removed from the active chamber and placed in controlled cooling environments, allowing the chamber to immediately begin new print jobs while prints continue to cool.
Solution Approach 2:
Temperature control capability is prepared in advance through dedicated cartridge storage environments. This preliminary preparation of cooling infrastructure eliminates the need for prints to occupy the print chamber during cooling.
Data Source
AI summary
A cartridge for a manufacturing system includes a sealable chamber having a bed. A powder hopper can be positioned within the sealable chamber. A powder spreader is positioned within the sealable chamber for distributing powder from the powder hopper onto the bed. In some embodiments the powder spreader can include a spreader assembly and a soot confinement enclosure, as wells a dosing mechanism arranged to deposit a specified amount of powder from the powder hopper onto the bed.