Moveable Radiation Source for 3D Printing Heating
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Solution Overview
Problem
Existing 3D printing systems rely on costly and inefficient statically fixed short wave infrared (IR) emitters for pre-heating the sinterable material surface, leading to reduced heating efficiency, increased costs, and potential damage to printing equipment due to unnecessary heating.
Innovation Solution
The system omits statically fixed short wave IR emitters and instead uses a moveable radiation source, such as a fusing lamp, to provide both heating and fusing functions, allowing for selective control of the radiation source to heat the sinterable material surface effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If statically fixed short wave IR emitters are used for pre-heating, then the sinterable material surface can be heated, but the heating efficiency is reduced due to air gap losses and the cost increases
Solution Approach 1:
The patent combines the pre-heating function and fusing function into a single moveable radiation source. The moveable radiation source performs both pre-heating of the sinterable material surface and subsequent fusing operations, eliminating the need for separate static IR emitters and reducing system complexity and cost.
Solution Approach 2:
The moveable radiation source is designed to perform multiple functions: it can pre-heat the sinterable material surface before fusing, and also perform the actual fusing operation. This multi-functional approach eliminates the need for dedicated pre-heating equipment, reducing overall system cost and improving heating efficiency by eliminating air gap losses associated with static emitters.
2Reliability
If statically fixed short wave IR emitters are used, then pre-heating can be performed, but unnecessary heating of printing equipment occurs causing damage and reduced equipment lifespan
Solution Approach 1:
The patent employs a moveable radiation source that can be dynamically positioned close to the sinterable material surface during pre-heating and fusing operations. This dynamic positioning allows the radiation source to target only the intended areas, preventing unnecessary heating of surrounding printing equipment and thereby extending equipment lifespan while maintaining reliability.
3Area of stationary object
If the size of the powder table is increased to print larger 3D objects, then more short wave IR emitters are needed, but this increases system cost and power consumption
Solution Approach 1:
The moveable radiation source can be repositioned to cover different areas of the powder table, allowing a single source to serve a larger printing area. This dynamic approach eliminates the need to increase the number of emitters when scaling up the powder table size, thereby avoiding increased system cost and power consumption while enabling production of larger 3D objects.
Solution Approach 2:
The single moveable radiation source performs both pre-heating and fusing functions across the entire powder table area, replacing what would traditionally require multiple dedicated emitters. This universal approach allows the system to handle larger powder tables without proportionally increasing the number of radiation sources, thus controlling system cost and power consumption even as printing capacity expands.
4Stability of the object's composition
If statically fixed short wave IR emitters are used, then pre-heating can be achieved, but thermal uniformity is reduced and the system cannot handle larger objects effectively
Solution Approach 1:
The moveable radiation source can be dynamically positioned and controlled to provide uniform heating across the entire sinterable material surface, regardless of the object size or powder table area. This dynamic positioning capability ensures consistent thermal distribution and uniformity even when printing larger 3D objects, overcoming the limitations of static emitters that struggle with thermal uniformity across large areas.
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 approach reduces the overall cost of the 3D printing system, enhances heating efficiency by eliminating air gap losses, and prolongs the lifespan of printing equipment by minimizing unnecessary heating, while also enabling the production of larger 3D objects with improved thermal uniformity.
Implementation Method 1
a moveable radiation source (e.g., a fusing lamp) is used to provide both heating and fusing functions
Implementation Method 2
During 3D printing, a layer of a sinterable material (e.g., a powder) is exposed to radiation, such that the sinterable material is fused and hardened
Data Source
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AI summary
In one example, a method for printing a three-dimensional (3D) object is described. The method may include a processor depositing a layer of a sinterable material on a support member, and preheating the layer of the sinterable material using a moveable radiation source. The method may further include the processor depositing a fusing agent on an imaged area of the layer of the sinterable material and fusing the imaged area of the layer of the sinterable material using the moveable radiation source.