three-dimensional printing of continuous-fiber composites by in-nozzle impregnation

We have developed a three-dimensional (3D)
Printing of continuous fibers
Based on melting-enhanced thermoplastic
Deposition Modeling.
This technology can be made directly in 3D without using the mold and may become the next standard
Manufacturing methods for composite materials.
A thermoplastic filament and continuous fibers are provided separately on the 3D printer, and before printing, they are soaked with filaments in the printer\'s heating nozzle.
With pla as The Matrix and twisted yarn of carbon fiber or natural jute fiber as the reinforcement.
One-way hemp fiber reinforced thermoplastic is an example of a plant
Composite material;
Those materials reinforced with one-way carbon fiber exhibit mechanical properties that are superior to Jute
Reinforced and unreinforced thermoplastic plastic.
Continuous fiber reinforcement improves the tensile strength of the printed composite, relative to the traditional 3D-Printed polymer-
Composite material.
Commercial PLA Silk (Hotproceed, 1. 75u2009mm diameter)
Used as a matrix material.
Pan (PAN)-
Carbon fiber based (T800S-10E, Toray)
Twisted natural hemp plant fibers are used as continuous reinforcement materials.
For carbon fiber, thousands of silk were extracted from the straight 24000 silk and supplied to the print head.
Carbon fiber is used-
It\'s made of epoxy resin.
The mechanical properties of carbon fiber and hemp fiber are shown.
For jute fibers, from twisted 500-Tex double yarn.
No surface treatment after purchase. The FDM Blade-
The 3D printer produced by Hotproceed in Japan was modified to print CFRTP, while the FlashForge printer produced by FlashForge 3D technology in Zhejiang, China was modified to print JFRTP.
Quasi-static tensile tests were performed on CFRTP, JFRTP and PLA samples using a universal tester (AG-
Is 150 kn of Shimizu)
At a speed of 1. 0u2009mm/min.
To measure strain, a strain gauge was installed on the surface of the sample.
For CFRTP, the sample configuration is rectangular with the PLA end label, while the JFRTP and PLA samples are dumbbell-shaped
There is no shape for the end label.
The shoulder part of the sample is directly clamped by the wedge clamp of the testing machine and a one-way tensile load is applied to the sample.
We tested four samples of CFRTP, JFRTP and PLA respectively.