3D Printing Layer Thickness Control via Real-Time Feedback
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Solution Overview
Problem
The existing three-dimensional shaped article production methods, such as the stacking method, face challenges in maintaining dimensional accuracy due to deviations in layer thickness, especially when the number of stacked layers is large, leading to a decrease in the overall accuracy of the final product.
Innovation Solution
A method and apparatus that involves forming layers by ejecting a composition containing particles and a solvent using a dispenser, with a measurement step to determine the height of each layer and adjusting the ejection amount based on driving waveform data to ensure precise layer formation, and a bonding step to bond the particles, thereby enhancing dimensional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the stacking method is used to rapidly form three-dimensional shaped articles without molds, then productivity is improved and cost is reduced, but dimensional accuracy deteriorates due to layer thickness deviation accumulation
Solution Approach 1:
The patent implements a feedback mechanism where the actual layer thickness is measured after formation, and this measurement information is used to adjust the ejection amount for subsequent layers. The control unit modifies the driving waveform data based on the deviation from target thickness, creating a closed-loop control system that compensates for accumulated errors and maintains dimensional accuracy while preserving the rapid production capabilities of the stacking method
Solution Approach 2:
The patent dynamically changes the ejection parameters (driving waveform data) of the dispenser based on real-time layer thickness measurements. By adjusting the ejection amount for each subsequent layer according to the actual thickness of the previous layer, the system optimizes material deposition to compensate for deviations, thereby maintaining consistent layer thickness and high dimensional accuracy throughout the stacking process
2Manufacturing precision
If the ejection amount of composition is increased to compensate for thin layers, then layer thickness is improved, but material waste increases and cost rises
Solution Approach 1:
The feedback mechanism precisely determines the actual layer thickness through measurement and calculates the exact compensation needed. This allows the system to increase the ejection amount only by the necessary margin to achieve target thickness, rather than using excessive material. The control unit adjusts the driving waveform data to provide precise compensation, minimizing material waste while ensuring adequate layer thickness
Solution Approach 2:
The patent applies partial compensation rather than excessive material application. By measuring the actual thickness deviation and applying only the necessary additional ejection amount to reach the target thickness, the system avoids the material waste that would result from uniformly increasing ejection for all layers or applying excessive compensation beyond what is actually needed
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 allows for the efficient production of three-dimensional shaped articles with high dimensional accuracy by adjusting the ejection amount of the composition per unit area, improving the precision and productivity of the final product, and enabling the formation of complex structures without the need for molds.
Implementation Method 1
by selecting driving waveform data for the dispenser when ejecting the composition from a data group including a plurality of pieces of driving waveform data based on the information of the height of an n-th layer which is the layer in the n-th position determined in the measurement step, the ejection amount of the composition per unit area onto the n-th layer in the layer formation step of forming an (n+1)th layer which is the layer in the (n+1)th position is adjusted
Implementation Method 2
a measurement step of determining the height of the layer
Implementation Method 3
a bonding step of subjecting a stacked body including a plurality of layers to a bonding treatment for bonding the particles
Data Source
AI summary
A three-dimensional shaped article production method includes a layer formation step of forming a layer by ejecting a composition containing particles and a solvent in a predetermined pattern using a dispenser, a measurement step of determining the height of the layer, and a bonding step of subjecting a stacked body including a plurality of layers to a bonding treatment for bonding the particles, wherein when n represents an arbitrary integer of 1 or more, by selecting driving waveform data for the dispenser when ejecting the composition from a data group including a plurality of pieces of driving waveform data based on the information of the height of the layer in the n-th position (n-th layer) determined in the measurement step, the ejection amount of the composition per unit area onto the n-th layer in the layer formation step of forming the layer in the (n+1)th position ((n+1)th layer) is adjusted.