Powder Blower Cleaning for Additive Manufacturing Layer Consistency
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Solution Overview
Problem
Powder-based additive manufacturing installations face issues with powder accumulation and clustering on the layering device, leading to inconsistent layer thickness and reduced part quality, especially when the layer thickness is in the order of micrometers, necessitating the prevention of powder clusters from reaching the powder deposition zone.
Innovation Solution
Incorporating a cleaning device with a blowing mechanism to dislodge powder clusters from hard-to-reach areas and a suction device to direct them to a dust extraction zone, while using sealing brushes to isolate the cleaning zone from the powder deposition zone, ensuring that the gas flow effectively reaches and removes clusters before they affect the deposition process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If powder deposition cycles are performed repeatedly, then part manufacturing progresses, but powder accumulates and forms clusters on the layering device surfaces
Solution Approach 1:
The blowing device performs preliminary cleaning action by blowing gas flow onto the powder deposition means before powder clusters can accumulate to problematic levels. This preventive cleaning removes loose powder from interstitial zones during or between deposition cycles, preventing cluster formation that would otherwise compromise layer thickness precision.
Solution Approach 2:
A gas flow is introduced as an intermediary medium between the powder deposition process and the powder clusters. The gas flow acts as a mediator that dislodges and removes powder from difficult-to-reach surfaces without direct mechanical contact, thereby maintaining manufacturing precision while allowing continuous productivity.
2Manufacturing precision
If cleaning means are added to remove powder clusters, then layer thickness precision is maintained, but device complexity increases
Solution Approach 1:
Instead of complex mechanical cleaning mechanisms, the invention employs pneumatic means (blowing device with gas flow) to achieve powder removal. This approach maintains manufacturing precision through effective cluster removal while avoiding the complexity of mechanical brushes, scrapers, or movable cleaning components that would increase device complexity.
Solution Approach 2:
The invention replaces potential mechanical cleaning systems with a pneumatic system. By using gas flow to dislodge and remove powder clusters, the design avoids mechanical contact and the associated complexity of mechanical cleaning components, thereby maintaining precision with simpler device architecture.
3Manufacturing precision
If gas flow is blown onto powder deposition means, then powder clusters are dislodged, but powder may be dispersed into the powder deposition zone
Solution Approach 1:
The blowing device is positioned and configured to extract dislodged powder away from the powder deposition zone. The gas flow not only dislodges clusters from the powder deposition means but also directs the removed powder toward extraction paths or away from the deposition zone, preventing re-contamination while maintaining cleaning effectiveness.
Solution Approach 2:
The gas flow serves as an intermediary that transports powder from the powder deposition means to a safe location away from the deposition zone. This mediator approach ensures that dislodged powder does not directly fall into or contaminate the powder deposition zone, resolving the contradiction between effective cluster removal and contamination prevention.
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
Significantly reduces the formation and presence of powder clusters in the powder deposition zone, maintaining consistent layer thickness and improving the quality of manufactured parts by ensuring a controlled and clean deposition process.
Implementation Method 1
a blowing device configured to blow a gas flow onto at least one surface of the powder deposition means
Implementation Method 2
a powder suction device for discharging the powder sucked by the suction device to a zone of the installation, called dust extraction zone
Data Source
AI summary
A powder-based additive manufacturing installation (10) comprises a powder layering device (14) that can be displaced along a path linking a start zone (A) and an end zone (B). The layering device (14) comprises powder deposition means (18) for depositing powder in a powder deposition zone (D) situated between the start zone (A) and the end zone (B). The installation comprises a cleaning device (40) situated on the path of the layering device (14). The cleaning device (40) comprises a blowing device (42) configured to blow a gas flow onto at least one surface of the powder deposition means (18).