Multi-Chamber Radiometer for 3D Printed Post-Curing Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a lack of standardized protocols for determining optimal post-curing exposure times for 3D printed products, particularly for end users who do not have access to recommended guidelines for their specific post-curing devices or resin types, leading to uncertainties in achieving desired mechanical properties and biocompatibility.
Innovation Solution
A self-contained multi-chamber radiometer device that continuously monitors electromagnetic radiation transmission through 3D printed objects during post-curing, using sensors to measure transmittance and correlate it with voltage, allowing for real-time optimization of post-curing times, and optionally includes a microprocessor for data recording and wireless communication for adjusting post-curing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If post-curing exposure time is extended to improve polymerization completeness, then mechanical properties and biocompatibility improve, but production time and energy consumption increase
Solution Approach 1:
The patent implements a feedback mechanism by measuring light transmittance through the 3D printed object during post-curing. The radiometer continuously monitors the light transmission, and when a predetermined transmittance threshold is reached, the system automatically terminates the post-curing process. This feedback loop eliminates the need for fixed-time post-curing, allowing optimization between complete polymerization and production time.
Solution Approach 2:
The patent changes the monitoring parameter from fixed time duration to light transmittance threshold. By using optical property changes during polymerization as the control parameter, the system dynamically adjusts post-curing duration based on actual material state rather than predetermined time, resolving the contradiction between thorough curing and time efficiency.
2Reliability
If post-curing exposure time is extended to ensure complete polymerization, then biocompatibility improves, but energy consumption increases
Solution Approach 1:
The radiometer provides real-time feedback on polymerization progress through light transmittance measurements. The system terminates post-curing automatically when the transmittance threshold is reached, preventing unnecessary energy consumption while ensuring sufficient polymerization for biocompatibility. This feedback mechanism optimizes the energy-time-biocompatibility triangle.
Solution Approach 2:
The material itself provides the signal for process termination through its changing optical properties during polymerization. The increasing light transmittance as polymerization progresses serves as a self-indicating mechanism, eliminating the need for external monitoring of polymerization completion and enabling energy-efficient automatic termination.
3Device complexity
If fixed post-curing time protocols are used for all object thicknesses, then device complexity is reduced, but manufacturing precision deteriorates
Solution Approach 1:
The patent transitions from time-based post-curing protocols to transmittance-based protocols. This parameter change allows a single unified protocol to adapt to different object thicknesses automatically, as the transmittance threshold accounts for light attenuation through different material path lengths, maintaining curing precision without increasing protocol complexity.
Solution Approach 2:
The real-time transmittance monitoring provides feedback that automatically compensates for variations in object thickness. Thicker objects naturally take longer to reach the transmittance threshold, but the feedback mechanism ensures each object receives exactly the curing needed, eliminating the need for multiple thickness-specific protocols while maintaining precision.
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 device enables end users to determine the optimal post-curing exposure time for 3D printed objects of varying thicknesses, enhancing mechanical properties and biocompatibility by ensuring complete polymerization, thus improving the quality of 3D printed products.
Implementation Method 1
the control port sensor is configured to measure the transmittance at a specific wavelength or within a specified range of wavelengths where no 3D printed object is placed on the control port. At least one other detector port is a sample port, where the sample port sensor is configured to measure the transmittance at a specific wavelength or within a specified range of wavelengths through a 3D printed object placed on the sample port
Implementation Method 2
By exposing specific photoinitiators to the proper wavelengths of electromagnetic radiation, the resin is photopolymerized to form a semi-solid layer
Data Source
AI summary
The present disclosure describes a device used to determine the optimal post-curing exposure time for 3D printed products and methods of using the same. The disclosed device is a self-contained multi-chamber radiometer for continuous monitoring of electromagnetic radiation transmitted through 3D printed objects during a post-curing process. The device includes multiple detector ports, including a control port and one or more sample ports. The detector ports may preferably be photocells configured to generate a voltage proportional to the intensity of the incident electromagnetic radiation at specific wavelength(s). The transmittance is directly correlated with the voltage and may be measured using the determined voltages. The disclosed device may further comprise a microprocessor, a memory module for storage of data obtained by the sensors, and one or more communication modules configured to enable wireless communication with a data storage device such as a computer.