Support Material for 3D Printing Resolving Warping and Cracking
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Solution Overview
Problem
Existing digital manufacturing systems face challenges in creating support structures for 3D models that are strong, easily removable, and do not distort, particularly in maintaining geometrical accuracy and speed of removal.
Innovation Solution
A support material feedstock comprising a primary copolymer with carboxyl and phenyl monomer units and an impact modifier with epoxy-terminated carboxylate ester groups, which is soluble in alkaline aqueous solutions, providing strong adhesion and rapid dissolution for efficient support structure removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional support materials are used, then support structures can be built, but they exhibit warping, cracking, and geometric inaccuracy
Solution Approach 1:
The patent modifies the chemical composition parameters of the support material by incorporating specific copolymers with controlled monomer ratios. The support material comprises a first copolymer (styrene-methacrylic acid copolymer) and a second copolymer (ethylene-glycidyl methacrylate copolymer) in specific proportions, which changes the material's physical and chemical parameters to eliminate warping and cracking while maintaining structural integrity during printing and removal.
Solution Approach 2:
The invention uses a composite support material system combining two different copolymer materials with complementary properties. The first copolymer provides adhesion and structural support, while the second copolymer with epoxy-terminated carboxylate ester groups provides flexibility and crack resistance. This composite approach allows the material to exhibit properties that neither component alone could achieve, resolving the contradiction between stability and precision.
2Strength
If support structures are made stronger, then they provide better support, but they become more difficult to remove
Solution Approach 1:
The patent employs parameter changes in the chemical composition to achieve both strength and ease of removal. The support material contains a first copolymer that provides structural strength and adhesion to the model, and a second copolymer with epoxy-terminated carboxylate ester groups that provides solubility in alkaline solutions. The specific ratio and composition parameters allow the material to be strong during printing but easily dissolved afterward, resolving the contradiction between strength and removal ease.
3Productivity
If support material is deposited rapidly, then production speed increases, but material quality may deteriorate
Solution Approach 1:
The invention changes the material parameters by using copolymers with optimized molecular weights, monomer ratios, and chemical compositions that enable rapid deposition without sacrificing quality. The support material's specific copolymer composition allows for fast extrusion and layer formation while maintaining uniformity, adhesion, and geometric accuracy, thus resolving the contradiction between productivity and 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 support material ensures minimal warping and cracking, rapid removal, and high production rates with improved part quality, maintaining geometrical accuracy and reducing mechanical distortions.
Implementation Method 1
The support material feedstock includes a first copolymer and a second copolymer... soluble in alkaline aqueous solutions
Implementation Method 2
An extrusion-based digital manufacturing system... is used to build a 3D model from a digital representation of the 3D model in a layer-by-layer manner by extruding a flowable modeling material
Implementation Method 3
The extruded modeling material fuses to previously deposited modeling material, and solidifies upon a drop in temperature
Data Source
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AI summary
A support material feedstock (36) comprising a first copolymer and a polymeric impact modifier, where the first copolymer includes a first monomer unit comprising a carboxyl group and a second monomer unit comprising a phenyl group.