3D Printing Print Head with IR Lamp Cooling
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Solution Overview
Problem
Current 3D printing methods using powdered materials face limitations in achieving high component strength due to the need for a significant volume of liquid binder, which is time-consuming and prone to process issues, and existing high-speed sintering processes are not scalable for larger build spaces.
Innovation Solution
A device with a build plane moved through a build space using a linear positioning unit, equipped with a print head for vector-like deposition of an IR acceptor and a rod-shaped IR lamp for selective heating, along with temperature management and cooling systems to maintain optimal temperatures and prevent heat loss, facilitating the HSS process for polymer materials like polyamide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If liquid binder is used to bind particulate material, then component strength is improved, but processing time increases and process reliability deteriorates
Solution Approach 1:
The patent replaces the liquid binder application system with an infrared radiation-based sintering system. Instead of depositing liquid binder material that requires time to solidify, the invention uses IR radiation to directly heat and fuse the particulate material, eliminating the time-consuming binder application and drying processes while maintaining component strength
Solution Approach 2:
The invention utilizes the phase transition of particulate material from solid to melted state through infrared radiation heating, then back to solid upon cooling. This phase transition approach allows direct binding of particles through melting and fusing, replacing the liquid binder mechanism and significantly reducing processing time
2Productivity
If IR radiation is used for high-speed sintering, then processing speed is improved, but scalability to larger build spaces deteriorates
Solution Approach 1:
The patent divides the build space into multiple zones with separate IR radiation sources and control systems. This segmentation allows independent optimization of different regions, enabling the system to scale to larger build spaces while maintaining high processing speeds through parallel operation of multiple radiation zones
Solution Approach 2:
The invention implements dynamic control of IR radiation sources, allowing real-time adjustment of radiation intensity, duration, and positioning. This dynamic adaptability enables the system to efficiently handle varying build space sizes and geometries, improving scalability while maintaining high-speed sintering performance
3Manufacturing precision
If temperature management system is added, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent incorporates temperature sensors and control systems that continuously monitor the temperature of particulate material and IR radiation sources. This feedback mechanism automatically adjusts radiation intensity to maintain optimal sintering temperatures, improving manufacturing precision while managing device complexity through automated control
Solution Approach 2:
The invention designs the temperature management system to utilize the thermal properties of the particulate material itself and the build chamber environment. The system leverages natural heat distribution and material-specific thermal characteristics, reducing the need for complex external temperature control apparatus while maintaining precise temperature management
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 enables faster and more efficient production of high-strength 3D components by effectively using IR radiation to solidify particulate materials, minimizing the need for excessive binder volume and improving scalability beyond small-scale operations.
Implementation Method 1
The IR radiation may be introduced in different ways, e.g., using a rod-shaped IR lamp, which is moved evenly over the build space
Implementation Method 2
The IR radiation is coupled into the particle material in the areas that are printed much more effectively than into the unprinted areas. This results in a selective heating in the layer beyond the melting point and thus to selective solidification
Implementation Method 3
The comparatively poor absorption of thermal radiation in colorless plastics is utilized here. However, this absorption may be increased many times by introducing an IR acceptor, also known as a moderating agent, into the plastic
Implementation Method 4
along with temperature management and cooling systems to maintain optimal temperatures and prevent heat loss
Data Source
AI summary
The present invention relates to a method for producing three-dimensional models by a layering technique, particulate build material being applied to a build space, and binder material subsequently being selectively applied to the build material with the aid of a printer, the binder material containing a moderating agent and subsequently being sintered with the aid of a heat lamp, the print head being protected against overheating by active and/or passive cooling.