The 3D printer for manufacturing carbon fibre reinforced plastic specimens is illustrated in Fig. 2. Molten
plastic was extruded from the nozzle having 0.9 mm in tip diameter, and successive plastic layers were laid down.
An ABS wire having 1.75 mm in diameter was melted for the extrusion. The temperature of the nozzle was
between 175 and 190 ºC. The nozzle speeds of the periphery and inside of the plate were 30 and 50 mm/s,
respectively, and the speeds for the first layer were slowed down to 80% to stabilise the deposition. The height of
one deposited layer was about 1.3 mm because of swell of molten plastic extruded from the nozzle. The diameter,
density and tensile strength of the carbon fibre were 6