3D Shaping Device Weight Feedback Control for Discharge Accuracy
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Solution Overview
Problem
Existing three-dimensional shaping devices face issues with nozzle clogging and inconsistent material discharge, leading to shaping accuracy problems such as gaps and increased line widths in the shaped object due to incomplete material deposition.
Innovation Solution
A three-dimensional shaping device equipped with a discharge unit, a weight measuring unit, and a control unit that adjusts the material discharge based on measured weight to ensure a predetermined amount of material is deposited, using a plasticization unit with a flat screw to control the rotation speed and a nozzle system for precise material distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the amount of liquid is adjusted according to the mass change of the film, then the shaping accuracy is improved, but the device complexity increases due to the need for weight measurement and feedback control
Solution Approach 1:
The patent implements a feedback control system where the weight measuring unit continuously measures the mass of the film on the shaping stage, and the control unit adjusts the liquid dispensing amount based on the measured mass change. This closed-loop feedback mechanism ensures accurate material deposition while maintaining shaping precision.
Solution Approach 2:
The patent replaces traditional mechanical measurement methods with a weight-based measurement system. Instead of mechanically measuring film dimensions or using complex geometric sensors, the system uses a weight measuring unit to directly quantify the mass of the deposited film, simplifying the measurement mechanism while improving precision.
2Manufacturing precision
If the intended amount of material is not discharged due to nozzle clogging or shaping environment, then the shaping accuracy deteriorates due to gap generation and line width increase, but the device complexity remains high
Solution Approach 1:
The weight measuring unit provides real-time feedback on the actual amount of material discharged by measuring the mass change of the film. When material discharge fails to meet the intended amount due to nozzle clogging or environmental factors, the control unit detects this discrepancy and adjusts the dispensing parameters to compensate, ensuring consistent shaping accuracy.
Solution Approach 2:
The system performs preliminary measurement of the film mass before and after material deposition to predict and prevent discharge failures. By monitoring the mass change in advance, the control unit can identify potential nozzle clogging or environmental issues before they affect shaping accuracy, allowing for proactive adjustment or alarm.
Data Source
AI summary
A three-dimensional shaping device includes: a discharge unit configured to discharge a shaping material; a weight measuring unit configured to measure a weight of the shaping material discharged from the discharge unit; and a control unit configured to control the discharge unit and the weight measuring unit to shape a three-dimensional shaped object by stacking layers of the shaping material in a shaping region of a stage, in which the control unit is configured to control the weight measuring unit to measure the weight of the shaping material discharged from the discharge unit, determine whether a predetermined amount of the shaping material is discharged from the discharge unit based on the weight measured by the weight measuring unit, and when it is determined that the predetermined amount of the shaping material is not discharged, control the discharge unit so that the predetermined amount of the shaping material is discharged from the discharge unit.