3D Printer Auger Screw Heater for Consistent Material Pre-Heating
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Solution Overview
Problem
Existing 3D printing systems require pre-heating of build material on the build platform, which can lead to uneven temperatures and inefficiencies due to shadowing effects from printer components, and involves an extra step that increases processing time.
Innovation Solution
Integrating heaters onto the auger screw housing to pre-heat the build material as it is lifted, utilizing convection principles for more efficient and consistent heating, eliminating the need for pre-heating on the build platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If pre-heating is performed on the build platform, then build material temperature is increased, but temperature uniformity deteriorates due to shadowing effects
Solution Approach 1:
The auger screw acts as an intermediary heating device, transferring heat to the build material during the material delivery process. This intermediary approach allows uniform heating through direct contact with the heated auger surfaces, avoiding the shadowing problems of overhead heating while maintaining temperature control.
Solution Approach 2:
The build material is pre-heated during the material delivery and spreading process itself, before it reaches the build platform. This preliminary heating action occurs during normal operation rather than as a separate step, ensuring uniform temperature distribution through the auger's rotating contact with the material.
2Temperature
If pre-heating on build platform is added, then build material temperature is improved, but processing time increases due to extra step
Solution Approach 1:
The heating function is merged with the material delivery function of the auger screw. The same component that transports and spreads the build material also heats it during the delivery process, eliminating the need for a separate pre-heating step and reducing overall processing time.
Solution Approach 2:
Heating occurs continuously during the material delivery process rather than as a discrete step. The auger screw maintains heating action throughout the entire material transport and spreading operation, ensuring continuous temperature control without interrupting the workflow.
3Temperature
If pre-heating on build platform is used, then build material temperature is increased, but system complexity increases
Solution Approach 1:
The auger screw is designed with multi-functionality, serving both as a material transport mechanism and as a heating device. By integrating heating elements into the auger housing and utilizing the auger's rotation for heat transfer, the system achieves temperature control without adding separate dedicated heating equipment.
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 enhances the efficiency of the 3D printing process by ensuring consistent heat application and reducing processing time by eliminating the extra step of pre-heating on the build platform, thereby improving the quality and speed of 3D printed parts.
Implementation Method 1
The movement of the build material while being heated also helps to improve heating efficiency using principles of convection as opposed to heating a still powder by just conduction means
Implementation Method 2
provide heaters onto a housing of an auger screw... The build material on the auger screw, and inside the housing, can be pre-heated to a desired temperature
Data Source
AI summary
In example implementations, an apparatus includes a storage unit, an auger screw, a housing enclosing the auger screw and at least one heater coupled to the housing. The auger screw receives a build material from the storage unit and delivers the build material to a build platform via movement of the auger screw. The build material is heated by the at least one heater as the build material is being moved by the auger screw.