3D Shaping Path Compensation for Layer Shrinkage
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Solution Overview
Problem
Existing three-dimensional shaping methods face accuracy issues due to shrinkage of lower layers, causing upper layers to be smaller than intended and affecting the overall shape of the final product.
Innovation Solution
A method involving a two-step shaping process where the second portion is shaped with an overlapping and non-overlapping section, with the non-overlapping section being in contact with the overlapping section, and the shaping path is adjusted to ensure accurate dimensions and prevent shrinkage-related size reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a nozzle scanning path for shaping an upper layer is set to overlap with a nozzle scanning path for shaping a lower layer, then the shaping process can be completed, but due to shrinkage of the actually shaped lower layer, the upper layer becomes smaller than the desired shape and shaping accuracy is affected
Solution Approach 1:
The patent applies preliminary action by pre-calculating and compensating for shrinkage in the scanning path design before the actual shaping process. The controller预先 adjusts the scanning path to account for expected shrinkage, so that the final dimensions match the target shape despite material contraction during curing.
Solution Approach 2:
The patent changes the scanning path parameters dynamically based on layer position and material properties. The controller modifies scanning speed, ejection amount, or path coordinates to compensate for shrinkage effects, transforming the scanning parameters to achieve accurate final dimensions despite material contraction.
2Manufacturing precision
If the scanning path is adjusted to compensate for shrinkage, then shaping accuracy is improved, but the complexity of path planning and control increases
Solution Approach 1:
The system applies self-service by implementing automatic shrinkage compensation through the controller, which autonomously calculates and adjusts scanning paths without requiring manual intervention. The controller itself performs the complex path planning and compensation calculations, making the system self-sufficient in maintaining accuracy.
Solution Approach 2:
The patent employs feedback mechanisms where the controller monitors actual shaping results and adjusts subsequent scanning paths accordingly. By incorporating feedback from previous layers' actual dimensions, the system refines its path planning to continuously improve accuracy while managing complexity through adaptive control.
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 improves the shaping accuracy of three-dimensional articles by preventing shrinkage-induced size reduction and ensures reliable cutting allowances, reducing shaping time and maintaining structural integrity.
Implementation Method 1
ejecting a shaping material to a stage... shaping a first portion of the three-dimensional shaped article
Implementation Method 2
due to shrinkage of the actually shaped lower layer
Data Source
AI summary
A method for producing a three-dimensional shaped article includes a first shaping step of shaping a first portion of the three-dimensional shaped article by ejecting a shaping material to a stage, and a second shaping step of shaping a second portion of the three-dimensional shaped article having an overlapping portion overlapping with the first portion, and a non-overlapping portion that does not overlap with the first portion, that forms a space between the same and the first portion, and that is in contact with the overlapping portion at one end. In the second shaping step, the overlapping portion is shaped by ejecting the shaping material onto the first portion, and thereafter, the non-overlapping portion is shaped by ejecting the shaping material so as to be in contact with the overlapping portion.