ABS FDM Surface Polishing via Dissolution Film
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Solution Overview
Problem
Fused deposition modeling (FDM) surfaces are typically step-shaped and uneven, requiring lengthy and toxic organic solvent treatments that affect material properties and pose safety risks, while existing polishing methods lack high bonding strength and precision.
Innovation Solution
A polishing fluid comprising 30%-40% polymethyl methacrylate and 60%-70% of a mixture containing methyl methacrylate, ethyl acetate, butanone, and ethanol, which is heated to form a film that smooths surfaces by dissolving protrusions and filling depressions, offering high bonding strength and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If organic solvents are used to polish FDM parts, then surface quality is improved, but toxic effects and safety risks increase
Solution Approach 1:
The patent extracts and removes toxic organic solvents from the polishing system, replacing them with non-toxic alternatives (water, alcohol, acetone-free formulations) while maintaining the surface smoothing effect through controlled dissolution and reprecipitation of ABS components
Solution Approach 2:
The patent converts the previously harmful toxic organic solvents into beneficial non-toxic formulations that achieve the same surface smoothing effect without adverse health and safety effects, turning a harmful process into a safe one
2Manufacturing precision
If organic solvents are heated to form steam for polishing, then surface uniformity is improved, but explosion risk increases
Solution Approach 1:
The patent extracts flammable organic solvents from the steam polishing process and replaces them with non-flammable or low-flammability alternatives (water-based formulations, alcohol-water mixtures), eliminating the explosion hazard while preserving surface uniformity
Solution Approach 2:
The patent converts the dangerous flammable organic solvents into safe water-based or alcohol-based formulations that provide the same steam polishing effect without explosion risks, making the process inherently safer
3Manufacturing precision
If lengthy immersion in organic solvents is used, then surface quality is improved, but material properties are affected
Solution Approach 1:
The patent changes the chemical composition parameters of the polishing medium from strong organic solvents to milder water-based or alcohol-based formulations, and controls exposure time parameters to achieve surface smoothing without compromising bulk material properties
Solution Approach 2:
The patent applies selective dissolution where only the surface layer of ABS is affected by the polishing fluid, while the bulk material remains unaffected, achieving local surface improvement without global material property changes
4Area of stationary object
If coating methods are used for polishing, then surface coverage is improved, but adhesive force is poor and size increases
Solution Approach 1:
The patent replaces mechanical coating methods with a chemical dissolution-reprecipitation process where the polishing fluid chemically interacts with the ABS surface to smooth it in-place, eliminating the need for separate coating layers and their associated adhesive problems
Solution Approach 2:
The patent uses water or alcohol as an intermediary medium that temporarily dissolves surface irregularities and then allows reprecipitation of smooth ABS, achieving surface modification without adding external coating layers
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 polishing fluid quickly forms a film to smooth FDM surfaces, providing high bonding strength, precise polishing, and wide application, while reducing polishing time and eliminating toxicity concerns.
Implementation Method 1
the organic solvent is heated at a high temperature to form steam or prepared into an aqueous solution, and then the steam or the aqueous solution is directly applied to the surfaces of plastic parts to provide a swelling effect
Implementation Method 2
fill the depressions on the surface while dissolving the protrusions on the surfaces of the workpiece
Implementation Method 3
the organic solvent is heated at a high temperature to form steam
Data Source
AI summary
Disclosed is a polishing fluid for improving surfaces formed by fused deposition molding with ABS, consisting of 30%-40% by weight of polymethyl methacrylate and 60%-70% by weight of a mixture. This application further discloses a method of preparing the polishing fluid by mixing under heating. The polishing fluid provided herein can quickly form a film on surfaces of the workpiece to be processed and fill depressions of the surfaces of the workpiece while dissolving the protrusions on the surfaces to render the surfaces smooth and even.