3D Printing Thermoset Composites With In-Situ Self-Propagating Curing
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Solution Overview
Problem
Existing methods for producing thermoset polymers are inefficient due to the difficulty in creating complex geometric shapes and the excessive time and energy required for curing, particularly in 3D printing of non-photocurable thermosetting polymers, which often necessitate additional post-fabrication curing processes.
Innovation Solution
An extrusion-based 3D printing method that initiates an exothermic reaction at the interface of a liquid resin and air, enabling in-situ self-propagation curing of non-photocurable thermosetting materials, eliminating the need for additional curing steps and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional molding and thermal curing methods are used to produce thermoset polymers, then the curing process achieves complete hardening of the polymer, but the process requires excessive time (up to eight hours) and energy (350 gigajoules) consumption
Solution Approach 1:
The patent divides the curing process into controlled segments by introducing catalyst-containing powder layer by layer during 3D printing. Each layer undergoes localized catalytic curing, breaking down the single large-scale thermal curing process into many small, efficient segments that accumulate to complete curing without requiring excessive energy or time
Solution Approach 2:
The patent introduces a catalyst (such as metal powder or chemical catalyst) as an intermediary substance that enables curing at lower temperatures and shorter times. The catalyst acts as a mediator between the thermoset polymer and the curing process, allowing the reaction to proceed efficiently without requiring the high energy input of traditional thermal curing
2Shape
If traditional molding methods are used to produce complex geometric shapes, then the manufacturing process can achieve complex geometries, but the process becomes inefficient due to difficulty in using molds and requires additional post-fabrication curing steps
Solution Approach 1:
The patent merges the 3D printing process with the curing process into a single integrated operation. The catalyst is introduced during printing, and curing occurs in-situ as each layer is deposited, combining what were previously separate steps (printing then post-curing) into one continuous efficient process that maintains geometric complexity while improving productivity
Solution Approach 2:
The patent applies preliminary action by pre-mixing or pre-positioning the catalyst with the thermoset polymer material before printing. This preliminary preparation ensures that the curing reaction can be immediately triggered layer by layer during printing, eliminating the need for separate post-fabrication curing steps and improving manufacturing efficiency
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
This method efficiently produces complex thermoset polymers layer-by-layer, saving energy, time, and cost while maintaining high-quality performance, suitable for applications in aerospace, automotive, marine, and energy industries.
Implementation Method 1
an exothermic reaction is initiated at a liquid resin-air interface, resulting in the in-situ polymerization of the thermosetting polymer material
Implementation Method 2
the in-situ polymerization of the thermosetting polymer material occurs at the interface, curing the thermosetting polymer material to the thermoset polymer
Data Source
AI summary
Methods and systems of 3D printing non-photocurable thermosetting polymer materials and continuous fiber composites that reduces the manufacturing time and energy required by implementing fast, self-sustaining, and self-propagating, in-situ curing of the polymer and the and continuous fiber composites as the non-photocurable thermosetting polymer materials are being printed.