Stereolithography Shutter Cooling Channel Design
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Solution Overview
Problem
The excessive heating of shutters in stereolithography apparatuses due to powerful radiation sources used in 3D printing, which can lead to deteriorated contrast in liquid crystal panels and hinder fast and effective photopolymerization processes.
Innovation Solution
Incorporating cooling channels between the radiation source and the shutter, with a blower to force coolant gas through these channels, allowing for effective heat dissipation and maintaining the shutter at a stable temperature, thereby enabling the use of various radiation sources and shutter types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a powerful radiation source is used to enable fast stereolithographic 3D printing, then productivity is improved, but temperature increases causing the shutter to overheat and contrast to deteriorate
Solution Approach 1:
A cooling channel is introduced as an intermediary component between the radiation source and the shutter. This channel allows coolant gas to flow through and absorb heat from the shutter, acting as a thermal mediator that protects the shutter from overheating while allowing the powerful radiation source to continue operating at high power for fast printing
Solution Approach 2:
The invention uses a pneumatic cooling system where a blower forces coolant gas through the cooling channel. The pressurized gas flow carries away heat from the shutter via forced convection, enabling the system to maintain shutter temperature within acceptable limits while using high-power radiation sources for rapid printing
2Productivity
If a powerful radiation source is used to enable fast stereolithographic 3D printing, then productivity is improved, but manufacturing precision deteriorates due to deteriorated contrast in liquid crystal panels
Solution Approach 1:
The cooling channel acts as a thermal intermediary that isolates the shutter from the heat generated by the powerful radiation source. By maintaining the shutter at a stable temperature, the contrast quality of the liquid crystal panel is preserved, ensuring manufacturing precision while allowing high-power sources to enable fast printing
Solution Approach 2:
The invention changes the thermal parameter (temperature) of the shutter by introducing active cooling. This parameter change maintains the shutter temperature within the optimal range for liquid crystal panel operation, preserving contrast quality and manufacturing precision even when using high-power radiation sources for rapid printing
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 allows for fast and effective selective irradiation of resin during stereolithographic 3D printing, maintaining the shutter's performance and extending its lifespan, while enabling the use of diverse radiation sources and shutter types, thus enhancing manufacturing efficiency and maintenance.
Implementation Method 1
a blower configured to force coolant gas through said cooling channel(s)
Implementation Method 2
a radiation source for generating radiation capable of polymerizing portions of said resin in said vat
Data Source
AI summary
A stereolitography apparatus comprises a fixed vat (401) or a holder for receiving a removable vat for holding resin during stereolithographic 3D printing, and a radiation source (501) for generating radiation capable of polymerizing portions of said resin in said vat. (401). The apparatus comprises a shutter (502) between said radiation source (501) and said vat (401) for allowing only selected portions of the generated radiation to reach said resin, and a cooling channel (503) between said radiation source (501) and said shutter (502). The apparatus comprises a blower (504) configured to force coolant gas through said cooling channel (503).