3D Printing Nozzle Movement Control for Ejection Consistency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In three-dimensional molding devices, the pressure in the flow path upstream of the butterfly valve can differ during non-ejection controls, leading to variations in the ejection amount when the material is restarted, affecting molding accuracy.
Innovation Solution
A method is introduced where the nozzle's movement time from an ejection stop position to an ejection restart position is controlled to be within a predetermined range, regardless of the movement distance, by adjusting the opening area of the flow path and controlling the nozzle's movement speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the non-ejection control is performed multiple times with different periods from ejection stop to ejection restart, then the nozzle can be repositioned flexibly, but the pressure in the flow path varies and ejection amount becomes inconsistent
Solution Approach 1:
The patent applies preliminary action by controlling the nozzle movement time in advance before ejection restart. Specifically, the control unit sets the movement time from the ejection stop position to the ejection restart position to be within a predetermined range, ensuring that pressure conditions are standardized before material ejection resumes. This preliminary time control prevents pressure variations that would otherwise occur with different non-ejection periods, thereby maintaining consistent ejection amounts across multiple non-ejection controls while preserving nozzle repositioning flexibility.
2Length of moving object
If the movement distance from ejection stop position to ejection restart position is increased, then the nozzle can cover more area, but the movement time increases and pressure conditions vary
Solution Approach 1:
The patent applies dynamics by making the nozzle movement speed variable based on movement distance. The control unit dynamically adjusts the movement time to fall within a predetermined range regardless of the specific distance traveled. This dynamic time control ensures that even when movement distance varies to cover different areas, the pressure conditions at ejection restart remain consistent, thereby maintaining manufacturing precision while enabling flexible area coverage.
Data Source
AI summary
A manufacturing method for an three dimensional molded object includes a first step of plasticizing a material to produce a plasticized material; a second step of forming the layer on a stage by moving a nozzle relative to the stage while ejecting the plasticized material from a nozzle opening; and a third step of stopping the ejection of the plasticized material during a movement time in which the nozzle relatively moves from an ejection stop position to an ejection restart position, wherein in the third step, a first control is performed to control the movement of the nozzle such that a difference between a first movement time, which is the movement time in a first case where a distance is a first distance, and a second movement time, which is the movement time in a second case where the distance is a second distance shorter than the first distance.