External Dosing Device for Low-Turbulence Additive Manufacturing
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Solution Overview
Problem
Existing dosing devices for additive manufacturing devices require significant space within the process chamber, leading to increased volume and flow turbulence, which complicates inerting and powder distribution.
Innovation Solution
A dosing device positioned outside the process chamber, featuring a movable powder container with a guide carriage and longitudinal drive, allowing precise and turbulence-free delivery of process powder into the chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dosing devices are arranged inside the process chamber to supply process powder directly to the coater, then powder delivery precision is improved, but the internal dimensions and volume of the process chamber increase
Solution Approach 1:
The dosing device is extracted from the process chamber and positioned externally. The powder container is movable and can be positioned outside the chamber, with only the necessary powder delivery interface extending into the process chamber. This extraction eliminates the need for large internal dosing device volume while maintaining precise powder delivery capability.
2Manufacturing precision
If dosing devices are arranged inside the process chamber, then powder delivery precision is improved, but flow turbulence increases due to shielding gas flow obstacles
Solution Approach 1:
The dosing device is removed from the internal environment and positioned externally to the process chamber. This extraction eliminates the flow obstacles that caused shielding gas turbulence, allowing smooth gas flow while maintaining precise powder delivery through the movable powder container interface.
3Ease of operation
If powder is fed from below using a lifting device, then powder delivery capability is improved, but considerable space is required beneath the process chamber
Solution Approach 1:
The powder container is designed as a movable component that can be dynamically positioned along a guide structure. Instead of fixed infrastructure requiring permanent space, the movable container can be accessed from various positions, eliminating the need for dedicated space beneath the chamber while maintaining powder delivery capability.
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 solution reduces the process chamber's volume, minimizes flow turbulence, and ensures precise powder distribution while maintaining inert conditions, enhancing manufacturing efficiency.
Implementation Method 1
a container guide for moving the powder container in a straight line along a conveying axis of the dosing device
Implementation Method 2
the powder container is designed to be deflected beyond the container guide along the conveying axis
Data Source
AI summary
A dosing device is for arrangement on the outside of a process chamber of an additive manufacturing device and for conveying process powder into the process chamber. The dosing device includes at least one powder container including at least one powder cavity which is designed to receive the process powder; and a container guide for moving the powder container in a straight line along a conveying axis of the dosing device. The powder container is movably arranged on the container guide, and the powder container is designed to be deflected beyond the container guide along the conveying axis.