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Ultrasonic-assisted continuous fiber reinforced thermoplastic resin 3D printing device and method

A technology of reinforced thermoplastic and continuous fiber, applied in the field of 3D printing, can solve the problems of weak ultrasonic effect, poor quality of fiber impregnation, and low bonding strength between layers, and achieve good interface bonding, reduced porosity, and fewer pores.

Pending Publication Date: 2022-05-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: for the defects of poor fiber impregnation quality, low interlayer bonding strength and high porosity in the current 3D printing of continuous fiber-reinforced thermoplastic resin composite materials, and the existing ultrasonic assisting effect cannot be used in between. In order to solve the shortcomings of the printing layer, the ultrasonic effect is weak, etc., an ultrasonic-assisted continuous fiber reinforced thermoplastic resin 3D printing device and method are provided, so that the ultrasonic wave directly acts on the inside of the molten continuous fiber reinforced thermoplastic resin prepreg filament and between the printing layer, providing The effect of fiber progress and the bonding force between printing layers

Method used

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  • Ultrasonic-assisted continuous fiber reinforced thermoplastic resin 3D printing device and method

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Effect test

specific Embodiment 1

[0040] The above-mentioned ultrasonic auxiliary continuous fiber reinforced thermoplastic resin 3D printing device and 3D printing method are adopted, wherein the specific parameters are:

[0041]The printing parameters are selected as follows: printing speed 5mm / s; printing temperature is 280°C; printing layer thickness is 0.4mm; print line spacing is 1.0mm; printing material is continuous glass fiber reinforced nylon 6 prepreg, silk diameter is 0.8mm; the upflow channel diameter of the printing nozzle is 2mm, the downflow diameter D2 is 0.8mm, the rounded angle treatment at the outlet, and the width of the edge of the printing nozzle L is 1mm.

[0042] The parameters of the ultrasonic device are: the ultrasonic frequency is 15kHz, and the ultrasonic vibration amplitude is 60μm.

[0043] After testing, the bending strength, tensile strength, interlayer shear strength and porosity of the continuous glass fiber reinforced nylon 6 composite specimens can reach 321MPa, 207MPa, 32MPa ...

specific Embodiment 2

[0045] The above-mentioned ultrasonic auxiliary continuous fiber reinforced thermoplastic resin 3D printing device and 3D printing method are adopted, wherein the specific parameters are:

[0046] The printing parameters are selected as follows: printing speed 5mm / s; printing temperature is 280°C; printing layer thickness is 0.5mm; print line spacing is 1.0mm; printing material is continuous carbon fiber reinforced nylon 6 prepreg, wire diameter is 1.0mm, printing nozzle upflow diameter D1 is 2.5mm, downflow diameter D2 is 1.2mm, rounded at the outlet, printing nozzle edge width L is 1.5mm.

[0047] The parameters of the ultrasonic device are: the ultrasonic frequency is 30kHz, and the ultrasonic vibration amplitude is 50μm.

[0048] After testing, the bending strength, tensile strength, interlayer shear strength and porosity of the continuous carbon fiber reinforced nylon 6 composite specimens can reach 518MPa, 376MPa, 38MPa and 1.6% respectively, while the bending strength, tens...

specific Embodiment 3

[0050] The above-mentioned ultrasonic auxiliary continuous fiber reinforced thermoplastic resin 3D printing device and 3D printing method are adopted, wherein the specific parameters are:

[0051]The printing parameters are selected as follows: printing speed 5mm / s; printing temperature is 415°C; printing layer thickness is 0.5mm; printing line spacing is 1.0mm; printing material is continuous carbon fiber reinforced polyetheretherketone prepreg, the diameter of the wire is 1.2mm, the upflow channel diameter of the printing nozzle is 3mm, the downflow diameter is 1.5mm, the rounding at the outlet is rounded, and the width of the edge of the printing nozzle L is 2mm.

[0052] The parameters of the ultrasonic device are: the ultrasonic frequency is 50kHz, and the ultrasonic vibration amplitude is 40μm.

[0053] After testing, the bending strength, tensile strength, interlayer shear strength and porosity of the continuous glass fiber reinforced polyetheretherketone composite specimen...

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Abstract

The invention relates to an ultrasonic-assisted continuous fiber reinforced thermoplastic resin 3D printing device and method, and the device comprises a printing platform (1), an ultrasonic fixing seat (5), an ultrasonic clamp (6), an ultrasonic amplitude transformer (7), an ultrasonic transducer (8), an ultrasonic generator (9), and a heat dissipation module (3). The ultrasonic fixing base (5), the ultrasonic clamp (6), the ultrasonic transducer (8), the ultrasonic amplitude-change pole (7) and the heat dissipation module (3) can integrally move along with a movement mechanism of the 3D printer. When the continuous fiber reinforced thermoplastic resin prepreg filaments pass through the internal flow channel of the vertical section of the ultrasonic amplitude-change pole, ultrasonic waves directly act on the molten continuous fiber reinforced thermoplastic resin prepreg filaments, so that full impregnation between fibers and thermoplastic resin is realized; when the ultrasonic waves are transmitted to the end face of the printing nozzle along the vertical section of the ultrasonic amplitude-change pole, the ultrasonic waves directly act between the printing layers, and then a 3D printing continuous fiber reinforced thermoplastic composite product which is small in pore, good in interface bonding and excellent in performance is prepared.

Description

Technical field [0001] The present invention relates to the field of 3D printing technology, in particular to an ultrasonic auxiliary continuous fiber reinforced thermoplastic resin melt impregnation 3D printing device, and a 3D printing method using the device. Background [0002] As one of the important symbols of the third industrial revolution, 3D printing technology is also listed with intelligent robots and artificial intelligence as the three key technologies that currently promote the progress of digital manufacturing. 3D printing technology has the advantage of not requiring the original embryo and mold, so it can effectively simplify the manufacturing process of the product and shorten the research and development cycle, which not only overcomes the energy consumption problem caused by the traditional subtractive manufacturing, but also makes the product manufacturing more intelligent, precise and efficient, and is widely used in the automotive, aerospace, construction,...

Claims

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Application Information

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IPC IPC(8): B29C64/118B29C64/20B29C64/209B33Y30/00
CPCB29C64/118B29C64/20B29C64/209B33Y30/00
Inventor 贾明印虞立果薛平
Owner BEIJING UNIV OF CHEM TECH
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