Heated Rail Cleaning for 3D Printers
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Solution Overview
Problem
In three-dimensional object printing systems, contamination from errant material drips on precision rails and motor housing disrupts the accuracy and reliability of cart movement, leading to suboptimal print quality due to the inability of existing cleaning methods to effectively remove materials that solidify or cure after ejection.
Innovation Solution
A cart with laterally spaced rails equipped with internal heating devices and scrapers mounted to a platform, allowing for the removal of contaminants from heated surfaces as the platform moves along the rails, ensuring precise cleaning of curved surfaces and continuous tracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cleaning methods are used on precision rails, then the cleaning process is simple, but they cannot effectively remove materials that solidify or cure after ejection
Solution Approach 1:
The patent applies parameter changes by heating the precision rails to elevated temperatures (e.g., 50°C to 150°C) to alter the physical state of contaminated materials. This thermal parameter change softens or melts cured or solidified materials, enabling the scrapers to effectively remove them from the rail surfaces, thereby resolving the contradiction between cleaning effectiveness and system complexity.
Solution Approach 2:
The patent replaces purely mechanical cleaning methods with a thermally assisted cleaning system. Instead of relying solely on mechanical scraping force, the system uses thermal energy to modify the contaminants' properties, making them easier to remove. This substitution enables effective cleaning of cured materials without requiring excessively complex mechanical scraping mechanisms.
2Reliability
If heating devices are added to clean cured materials, then cleaning effectiveness improves, but energy consumption increases
Solution Approach 1:
The heating devices are applied locally only to the precision rails where contamination occurs, rather than heating entire components or the whole system. This localized heating approach concentrates energy where needed to soften contaminants for scraper removal, improving cleaning effectiveness while minimizing overall energy consumption by avoiding unnecessary heating of other system parts.
3Reliability
If scraping force is increased to remove solidified material, then cleaning effectiveness improves, but rail surface damage risk increases
Solution Approach 1:
The patent changes the thermal parameter of the rail surface by heating it to soften contaminants. This parameter change reduces the hardness and adhesion of cured materials, allowing scrapers to remove them with lower mechanical force. Consequently, cleaning effectiveness improves while the risk of damaging the precision rail surface is minimized, as the softened materials require less aggressive scraping.
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 solution effectively removes contaminants from precision surfaces, maintaining the accuracy and reliability of cart movement and improving the quality of printed objects by preventing material accumulation and ensuring efficient heat dissipation for motor performance.
Implementation Method 1
two heating devices, one heating device connected to the internal cavity of one of the two laterally spaced rails and the other heating device connected to the internal cavity of the other of the two laterally spaced rails to enable each heating device to heat a surface of the rail
Data Source
AI summary
A printing system for forming three-dimensional objects includes two laterally spaced rails, each of the rails have an internal cavity extending through the rail along a longitudinal axis. The printing system further includes two heating devices, one heating device is connected to the internal cavity of one of the two laterally spaced rails and the other heating device is connected to the internal cavity of the other of the two laterally spaced rails to enable each heating device to heat a surface of the rail in which the heating device is positioned. The printing system further includes a platform configured to move along the laterally spaced rails. The printing system also includes at least one of a pair of scrapers, wiper pads, and wiper blades mounted to the cart.