3D Printing Polymer Powder with Radiation Absorbing Additive
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Solution Overview
Problem
Existing 3D printing methods face challenges in efficiently melting polymer powders with high crystallization and melting temperatures, requiring excessive radiation power and time, which can lead to heat loss and damage to printer components.
Innovation Solution
Incorporating a radiation absorbing additive into the polymer powder build material composition to enhance radiation absorbance, allowing for faster and more efficient heating of the polymer powder during the 3D printing process, while maintaining the mechanical properties of the printed objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If excessive radiation power is used to melt polymer powders with high crystallization and melting temperatures, then the polymer powder can be melted, but heat loss occurs and damage to printer components is caused
Solution Approach 1:
A radiation-absorbing additive is introduced as an intermediary substance between the radiation source and the polymer powder. This additive absorbs radiation energy and converts it to thermal energy, which then heats the polymer powder uniformly and efficiently, preventing direct radiation damage to printer components while achieving the required melting temperature.
Solution Approach 2:
The optical properties of the build material composition are changed by adding radiation-absorbing additives. This modification alters the absorption spectrum and thermal characteristics of the material, enabling it to convert radiation into heat more efficiently at lower radiation power levels, thus preventing energy loss and component damage.
2Temperature
If excessive radiation power is used to melt polymer powders with high crystallization and melting temperatures, then the polymer powder can be melted, but damage to printer components is caused
Solution Approach 1:
The radiation-absorbing additive serves as a protective intermediary that intercepts radiation energy before it can directly damage printer components. By converting radiation to thermal energy through the additive, the system achieves the necessary heating of polymer powder while preventing harmful radiation effects on the printer's structural components.
3Temperature
If extended exposure time is used to melt polymer powders with high crystallization and melting temperatures, then the polymer powder can be melted, but productivity is reduced
Solution Approach 1:
The radiation-absorbing additive acts as an energy transfer intermediary that accelerates the heating process. By efficiently converting radiation to thermal energy, the additive enables rapid heating of the polymer powder to its melting point, significantly reducing the exposure time required and thereby increasing 3D printing productivity.
Solution Approach 2:
The thermal response characteristics of the build material composition are modified by incorporating radiation-absorbing additives. This changes the heating rate and temperature rise profile, allowing the polymer powder to reach melting temperature much faster, thus reducing cycle time and improving production efficiency.
4Temperature
If high radiation power is used to melt polymer powders with high crystallization and melting temperatures, then the polymer powder can be melted, but the heating time becomes excessive
Solution Approach 1:
The radiation-absorbing additive functions as an efficient energy conversion intermediary that bridges the gap between radiation input and thermal output. This intermediary substance enables rapid and uniform heating of the polymer powder to the required melting temperature, eliminating excessive heating times while maintaining control over the thermal process.
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 use of radiation absorbing additives accelerates the pre-heating of polymer powders, enabling the production of 3D articles from a wide range of polymers, including those with high melting points, within acceptable heating times and power ranges, without compromising the mechanical properties or causing damage to printer components.
Implementation Method 1
Incorporating a radiation absorbing additive into the polymer powder build material composition to enhance radiation absorbance
Implementation Method 2
allowing for faster and more efficient heating of the polymer powder during the 3D printing process
Implementation Method 3
melting polymer powders with high crystallization and melting temperatures
Data Source
AI summary
A three-dimensional printing build material composition includes a polymer particle, and a radiation absorbing additive mixed with the polymer particle. The radiation absorbing additive has a particle size ranging from about 1 μm to about 100 μm, and the radiation absorbing additive is to absorb incident radiation having wavelengths ranging from 700 nm to 10 μm.