3D Printer Nozzle Tip Shielding for Heat Transfer Control
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Solution Overview
Problem
Existing three-dimensional shaping apparatuses face issues with nozzle clogging due to heat transfer from the heating block, leading to deformation of shaped articles and reduced efficiency, as the material accumulates in the nozzle flow channel over time.
Innovation Solution
A three-dimensional shaping apparatus with a nozzle tip having a shield to suppress heat transfer from the heating block, combined with a control unit that determines the cumulative ejection amount of material to prevent clogging by monitoring and managing the material flow, allowing for timely replacement of the nozzle tip.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the heating block is used to melt and convey material through the nozzle flow channel, then the material can be continuously supplied to the stage for three-dimensional shaping, but heat transfers to the material stacked at the stage causing deformation of the three-dimensional shaped article
Solution Approach 1:
The nozzle assembly is segmented into a nozzle tip and a heating block that can be detachably attached to each other. This allows the heating function to be separated from the material ejection function, enabling the heating block to be removed or adjusted without affecting the nozzle tip and stacked material, thus preventing heat-induced deformation while maintaining continuous material supply capability
Solution Approach 2:
A shield member is introduced as an intermediary component between the heating block and the material stacked at the stage. This shield blocks the thermal radiation and heat transfer path from the heating block to the stacked material, preventing deformation while allowing the heating block to continue melting and supplying material through the nozzle flow channel
2Productivity
If the heating block continuously heats the material in the nozzle flow channel, then the material remains plasticized and can be ejected smoothly, but material accumulates in the nozzle flow channel over time causing clogging
Solution Approach 1:
The nozzle tip is designed to be detachably attachable to the heating block, making the nozzle assembly dynamic rather than fixed. This allows the nozzle tip to be easily replaced or cleaned when material accumulation is detected or anticipated, maintaining reliable material ejection functionality while enabling continuous operation through periodic maintenance
Solution Approach 2:
The control unit monitors the shaping process and determines when to replace the nozzle tip based on accumulated usage or detected material accumulation trends. By proactively replacing the nozzle tip before complete clogging occurs, the system maintains smooth material ejection and prevents production interruptions
3Productivity
If the nozzle tip is kept in place for continuous operation, then productivity is maintained, but heat transfer deforms the shaped article and material accumulation causes clogging
Solution Approach 1:
The nozzle assembly is divided into separable components (nozzle tip and heating block) that can be independently handled. This segmentation allows the heating block to remain in place for continuous heating while the nozzle tip can be quickly exchanged if issues arise, or the entire assembly can be briefly removed for cleaning without interrupting the overall production process significantly
Solution Approach 2:
The shield member acts as a protective intermediary that allows the heating block to remain in its heating position for continuous operation while blocking harmful heat transfer to the stacked material. This enables uninterrupted productivity while preventing the deformation that would otherwise require production stoppage for correction
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 solution effectively suppresses heat transfer to the material, preventing deformation and reducing the likelihood of nozzle clogging, thereby ensuring consistent and efficient shaping of three-dimensional articles by allowing for proactive nozzle maintenance based on cumulative ejection data.
Implementation Method 1
heat of a heater for melting the material
Implementation Method 2
heater for melting the material
Implementation Method 3
a first shield for suppressing transfer of heat of the heating block to the material stacked at the stage
Data Source
AI summary
A three-dimensional shaping apparatus includes a material storage portion that stores a material, a heating block that has a heater and is provided with a through hole, a nozzle tip that is provided with a nozzle flow channel having a nozzle opening and that is detachably attached to the through hole of the heating block, a material conveying mechanism that conveys the material to the nozzle flow channel of a nozzle tip for shaping being the nozzle tip attached to the heating block, a stage at which the material plasticized by heat of the heating block is ejected from the nozzle opening of the nozzle tip for shaping and stacked, and a control unit that shapes a three-dimensional shaped article by moving the nozzle tip for shaping with respect to the stage and ejecting the material to the stage from the nozzle tip for shaping.