Conductive Build Material Source Container for 3D Printing
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Solution Overview
Problem
Additive manufacturing systems face challenges with static electricity buildup during the movement of particulate build materials, which can lead to inefficiencies and potential issues like incendiary discharges, particularly in the handling and recycling of powder-based materials within 3D printing systems.
Innovation Solution
The use of conductive materials in critical components of the build material source containers and connection units within the 3D printing system, such as the outlet structure and connection units, provides an electrostatic discharge path to ground, mitigating static electricity generation during the handling and movement of powders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If aspiration techniques are used to transport build material, then material movement efficiency is improved, but static electricity buildup increases due to friction of high-velocity particles
Solution Approach 1:
The patent applies the principle of converting harm into benefit by using the static electricity that naturally builds up during aspiration to drive the movement of build material. The static charge accumulated on particles during high-velocity transport through the outlet structure is harnessed to attract and move additional material, transforming a harmful effect into a useful driving force that enhances material flow without requiring additional energy input.
Solution Approach 2:
The patent changes the electrical parameter of the build material by allowing static charge to accumulate during aspiration. This parameter change from neutral to charged state enables the material to interact with electric fields within the container, facilitating controlled movement and distribution of material that would otherwise be difficult to manage during high-velocity transport.
2Reliability
If conductive materials are used in outlet structure and connection units, then static electricity discharge path is improved, but device complexity increases
Solution Approach 1:
The outlet structure and connection units serve multiple functions: they guide build material flow, contain static charge during transport, and provide a controlled discharge path to ground. By integrating these functions into existing components rather than adding separate systems, the patent achieves reliable static electricity management without significantly increasing device complexity.
Solution Approach 2:
The conductive materials in the outlet structure and connection units automatically provide electrostatic discharge paths without requiring external control systems or additional components. The system self-regulates by allowing static charge to naturally dissipate through the conductive elements to ground, eliminating the need for complex active management systems.
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
This solution effectively reduces static electricity buildup, enhancing the reliability and safety of the 3D printing process by ensuring a continuous electrostatic discharge path, thus preventing potential issues like incendiary discharges and improving the handling and recycling of build materials.
Implementation Method 1
the source container comprises a conductive material and the connection unit comprises an electrically conductive portion to electrically connect the build material source container to an Earthed portion of the material management station
Implementation Method 2
provides an electrostatic discharge path to ground, mitigating static electricity generation during the handling and movement of powders
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
There is provided a build material source container (114) for use in a material management station of a three dimensional (3D) printer. The source container defines a substantially enclosed space for holding build material and has an aperture (206) for build material ingress and egress. At least part of the build material source container is formed from an electrically conductive material. The conductive material portion of the build material source container is connectable to Earth to discharge static electricity generated within the build material source container.