UV Laser 3D Printing Temperature Control
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Solution Overview
Problem
Existing 3D printing methods face challenges in precise temperature control of polymer materials, particularly due to similar melting and decomposition temperatures, leading to issues with material properties and the occurrence of material crimp caused by excessive temperature gradients.
Innovation Solution
An ultraviolet laser 3D printing method and device that incorporates a thermostat, scanning galvanometer, non-contact temperature monitoring, and a dual-die laser head with graduated neutral density filters for precise temperature control, allowing real-time adjustment of laser power to maintain a consistent processing temperature and reduce temperature gradients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional laser heating methods are used to process polymer materials, then the processing speed can be maintained, but the temperature control precision deteriorates due to excessive temperature gradients causing material crimp
Solution Approach 1:
The laser beam is segmented into multiple independent laser sources arranged in an array. Each laser source can be independently controlled to heat different regions of the polymer material, allowing precise temperature control across the processing area and reducing temperature gradients that cause material crimp.
Solution Approach 2:
Different regions of the polymer material receive different heating intensities through the array of laser sources. The system applies local quality control by adjusting the power of individual laser sources based on the specific thermal requirements of different areas, preventing excessive temperature gradients and material deformation.
2Productivity
If a single high-power laser is used for rapid processing, then productivity is improved, but temperature uniformity deteriorates leading to material property changes
Solution Approach 1:
The single high-power laser is replaced by an array of multiple lower-power laser sources. This segmentation allows the system to maintain high overall processing speed through parallel heating while ensuring temperature uniformity across the material surface, preventing changes in material properties.
Solution Approach 2:
The system dynamically adjusts the power output of each individual laser source in the array based on real-time temperature feedback and processing requirements. This dynamic control enables rapid processing while maintaining stable material properties through optimized heat distribution.
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 solution enables precise temperature control, reducing the likelihood of material crimp and undesirable sintering, thereby improving the quality and precision of 3D printed polymer materials by maintaining a consistent processing temperature and minimizing temperature gradient differences.
Implementation Method 1
UV laser has the advantages such as short wavelength, high resolution, concentrated energy focusing, stable pulse and high repetition frequency. Furthermore, it has the characteristic of 'cold processing' which allows the direct destruction of the chemical bond of connecting material without producing external heat to periphery.
Implementation Method 2
The principle is to form a digital model by the modeling based on the computer aided design (CAD) or computer animation, resolve the 3D model into two-dimensional cross sections layer by layer, and then produce an entity product by accumulating and solidifying the printing material layer by layer
Implementation Method 3
a thermostat for maintaining a constant temperature of working environment
Implementation Method 4
said ultraviolet laser beam can be deflected to the processing platform by a scanning galvanometer
Implementation Method 5
a non-contact type temperature monitoring device is equipped at a distance above the processing platform, and said temperature monitoring device is used to no-contact measure the temperature of the powder layer
Data Source
AI summary
An ultraviolet laser 3D printing device includes a thermostat, a laser head, a non-contact type temperature monitoring device, a scanning galvanometer, a processing platform, a powder laying device, a material to be processed, a computer control system. The device is configured to perform the following functions: presetting a processing temperature by the control system; during the processing procedure, the temperature rise condition of the processed object is monitored by the non-contact type temperature monitoring device and fed back in real time to the control system; and by recording the rise value of the temperature within a certain period, the system can obtain the absorption capability of the laser and the temperature rise degree of the processed material, so that the laser output power can be calculated according to the preset processing temperature value, and the laser power can be adjusted in real time to precisely control the processing temperature.