Electromagnetic Induction Additive Manufacturing for Epoxy Resin Curing
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Solution Overview
Problem
Existing 3D printing techniques face challenges in efficiently producing epoxy-based resin parts due to processing difficulties, incompatibility with standard machines, and constraints in resin viscosity, leading to uneven print layouts, high costs, and low productivity.
Innovation Solution
An electromagnetic induction-based additive manufacturing system using a resin bath with magneto-sensitive particles and a movable head to precisely cure epoxy resin layers through controlled electromagnetic radiation, allowing for efficient and precise formation of cured resin products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional 3D printing techniques (FDM, SLS, SLA) are used for epoxy-based resins, then manufacturing process is established, but processing difficulty increases and manufacturing precision deteriorates due to incompatibility with standard techniques
Solution Approach 1:
The patent replaces traditional mechanical/thermal processing methods (FDM extrusion, SLS laser sintering, SLA UV curing) with electromagnetic induction heating to cure epoxy resin. The electromagnetic induction system directly heats the resin material without requiring mechanical extrusion or complex thermal fields, simplifying the manufacturing process while maintaining precision through controlled electromagnetic field application.
Solution Approach 2:
The patent changes the curing mechanism from thermal or photopolymerization to electromagnetic induction heating. By controlling the electromagnetic field parameters (frequency, power density), the system achieves precise temperature control during curing, improving both ease of manufacture and manufacturing precision simultaneously.
2Productivity
If electromagnetic radiation is used to cure resin, then curing speed increases, but temperature control becomes more difficult leading to potential overheating
Solution Approach 1:
The patent incorporates temperature sensing and feedback control mechanisms that monitor the resin temperature during electromagnetic induction curing. The system automatically adjusts electromagnetic field power based on real-time temperature readings, preventing overheating while maintaining high curing speed. This feedback loop resolves the contradiction between rapid curing and temperature control.
Solution Approach 2:
The patent employs periodic or pulsed electromagnetic radiation application rather than continuous exposure. By cycling the electromagnetic field on and off, the system allows heat dissipation between pulses, enabling rapid curing through high-power brief exposures while maintaining temperature control through the periodic nature of energy input.
3Ease of operation
If resin viscosity is increased to improve material handling, then material flow control improves, but printing speed decreases due to slower material response
Solution Approach 1:
The patent applies electromagnetic induction heating to the resin material before it reaches the printing nozzle or deposition point. This preliminary heating reduces the resin viscosity in advance, allowing the material to flow more easily through the printing system while maintaining the ability to cure rapidly once deposited. This resolves the contradiction by pre-adjusting material properties rather than relying on post-deposition changes.
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 system enables rapid curing of epoxy resin at controlled temperatures, achieving high-quality, complex resin structures with reduced production time and improved efficiency, overcoming the limitations of traditional 3D printing methods.
Implementation Method 1
a movable head that includes an electromagnetic radiation generating device and is positioned above the support platform and configured to not be submerged in the electromagnetically sensitive resin liquid contained in the resin bath
Implementation Method 2
electromagnetic radiation from the movable head is configured to heat only the portion of the electromagnetically sensitive resin liquid contained in the resin bath in the vicinity of the the movable head and/or in the range of electromagnetic radiation and thereby cure the electromagnetically sensitive resin liquid in the portion
Data Source
AI summary
An additive manufacturing system based on electromagnetic induction heating is proposed for making three dimensional structures using thermosets. The additive manufacturing system that includes a resin bath containing an electromagnetically sensitive resin liquid, a support platform having an adjustable support platform height such that the support platform can be reversibly submerged in an electromagnetically sensitive resin liquid contained in the resin bath and a support platform adjustment motor connected to the support platform. The system further includes a movable head positioned above the support platform and including an electromagnetic radiation generating device, a head adjustment motor connected to the movable head and configured to adjust a position of the movable head, and a controller configured to control the support platform and the position of the movable head. The movable head is configured to move in a 3D space above the support platform and have the electromagnetic radiation from the movable head heat a portion of the electromagnetically sensitive resin liquid contained directly below the movable head.