Magnetic Thermosetting Composition for Uniform Internal Curing
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Solution Overview
Problem
Conventional 3D printing methods using thermosetting and photocurable resins face issues such as imprecise shape, non-uniform curing, phase separation, and low hardness due to equipment limitations and heat-related problems, particularly with the use of magnetic composite materials.
Innovation Solution
A thermosetting composition utilizing magnetic particles with multiple domains that generate vibrational heat under an external magnetic field for uniform curing, avoiding eddy currents and hysteresis losses, ensuring stable and precise curing of the resin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electromagnetic induction heating is used to cure thermosetting resin, then curing speed is improved, but temperature difference between contact surface and inside is generated causing non-uniform curing
Solution Approach 1:
The patent uses magnetic particles with multi-magnetic domains that generate vibrational heat through magnetization reversal under an external magnetic field. This vibrational heating mechanism produces uniform heat distribution throughout the resin without the temperature gradients characteristic of conventional electromagnetic induction heating, thereby achieving both fast curing speed and uniform curing quality.
2Power
If conventional electromagnetic induction heating is used, then heat generation efficiency is improved, but hysteresis loss occurs reducing curing quality
Solution Approach 1:
The patent changes the key parameter of magnetic particle size to the nanometer range (1-100 nm), which fundamentally alters the heating mechanism. At this scale, hysteresis loss becomes negligible and eddy current effects are minimized, allowing heat generation primarily through vibrational mechanisms. This parameter change enables efficient heat generation without the energy losses associated with conventional electromagnetic induction heating.
3Manufacturing precision
If photocurable resin is used for 3D printing, then shape precision is improved, but equipment size and storage requirements increase
Solution Approach 1:
The patent replaces the photocuring mechanism (which requires complex UV light sources and optical systems) with a magnetic field-based vibrational heating mechanism. This substitution eliminates the need for large-scale optical equipment while achieving precise curing control through magnetic field application, thereby maintaining shape precision while reducing equipment complexity and size.
4Ease of manufacture
If thermosetting resin is cured by conventional heating, then process simplicity is improved, but heat shrinkage and phase separation occur
Solution Approach 1:
The patent employs vibrational heating through magnetic particle oscillation to cure the thermosetting resin. This vibrational energy promotes uniform heat distribution and molecular mobility during curing, preventing phase separation between organic and inorganic components while avoiding the heat shrinkage problems associated with conventional thermal heating methods.
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 achieves uniform and stable curing of the thermosetting resin, enhancing the physical properties of the cured product by controlling the coercive force and saturation magnetization of the magnetic particles, reducing hysteresis loss and ensuring excellent mechanical properties.
Implementation Method 1
The present application generates vibrational heat by magnetization reversal of magnetic particles through electromagnetic induction heating
Implementation Method 2
vibrational heat is generated from the magnetic particles through the application of a magnetic field to the composition
Implementation Method 3
be magnetized by an external alternate-current magnetic field. Here, the irregular arrangement of the magnetic domains may mean a state where magnetic directions existing in the magnetic domains are each different and not aligned, and in this case, may be a state without magnetism as the net value of the magnetization at room temperature is zero. However, when an external magnetic field is applied, the magnetic directions of the magnetic domains are aligned, whereby the magnetic particles can be magnetized
Implementation Method 4
a thermosetting resin, and magnetic particles... In the curing method according to the present application, vibrational heat is generated from the magnetic particles through the application of a magnetic field to the composition, whereby the entire thermosetting resin can be uniformly cured
Data Source
AI summary
The present invention relates to a thermosetting composition and a method for curing the same, and provides a thermosetting composition capable of realizing uniform curing physical properties of a cured product.