A 3D printing device of continuous fiber and short fiber co-reinforced resin
A continuous fiber, 3D printing technology, applied in the direction of 3D object support structure, additive processing, manufacturing tools, etc., can solve the problems of difficult to meet the demand, poor interlayer performance, low mechanical properties, etc., to improve interlayer performance and avoid Effects of fiber damage and processing difficulties
Active Publication Date: 2022-08-05
XI AN JIAOTONG UNIV
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Problems solved by technology
However, the mechanical properties of single resin molded parts are low, and it is difficult to meet the demand for high-performance materials in many fields, and then the composite printing technology of fiber-reinforced thermoplastic resin has been developed.
[0003] Fibers in fiber-reinforced resin-based composite materials can be divided into three types: continuous fibers, long fibers, and short fibers in terms of length. The addition of continuous fibers makes the fibers the main load-bearing material in the printing direction, and the resin is the force-transmitting material. Greatly enhance the mechanical properties of the material, but there will be problems with poor interlayer performance
Method used
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Embodiment
[0037] Embodiment: carbon fiber is selected for continuous fiber and short fiber, and polylactic acid (PLA) is selected for resin;
[0038] The continuous fiber yarn on the unwinding rack 1 is unwound into the continuous fiber dispersion mechanism 2. In the continuous fiber dispersion mechanism 2, the distance and height between the rollers are set so that the continuous fiber wrapping angle is 120°; open the air gun, Make the wind blow vertically downward to the continuous fiber tow, and realize the dispersion of the continuous fiber under the combined action of the roller and wind pressure;
[0039] 75% ethanol solution is selected for the dispersion liquid, the short fibers are put into the barrel, and the short fibers are dispersed under the action of the stirring blade 3-1;
[0040] The dispersed continuous fibers pass through the spray plate of the short fiber spraying mechanism 3, and the mixed short fibers and the dispersion liquid are sprayed on the continuous fibers ...
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Abstract
A 3D printing device in which continuous fibers and short fibers are co-reinforced with resin, comprising a feeding frame, the continuous fibers on the feeding frame pass through a first traction mechanism and then enter a continuous fiber dispersing mechanism for dispersion, and the dispersed continuous fibers are sprayed by the short fibers. After spraying the short fibers, the mechanism enters the laying conveyor belt. There is a hot pressing roller above the laying conveyor belt. The thermoplastic resin film on the resin film reel bracket is hot pressed on the short fibers and continuous fibers by the hot pressing rollers. The impregnated sheet of fiber co-reinforced resin; the impregnated sheet passes through the filament forming die and is pulled by the second pulling mechanism to form the prepreg, and the prepreg is 3D printed by the 3D printer; the present invention realizes the prepreg after the short fiber wraps the continuous fiber and melts and impregnates the prepreg. On the basis of the enhanced mechanical properties of continuous fiber printed parts, the interlayer properties of the parts are further improved, and the mechanical properties and interlayer properties of the parts are enhanced.
Description
technical field [0001] The invention relates to the technical field of 3D printing of fiber-reinforced thermoplastic resin-based composite materials, in particular to a 3D printing device for co-reinforced resin with continuous fibers and short fibers. Background technique [0002] Thermoplastic resin is widely used in the field of 3D printing due to its characteristics of repeated softening and curing, good toughness, easy storage, reusability, and no environmental pollution. However, the mechanical properties of single resin molding parts are low, and it is difficult to meet the demand for high-performance materials in many fields, and then the printing technology of fiber-reinforced thermoplastic resin-based composite materials has been developed. [0003] Fibers in fiber-reinforced resin-based composite materials can be divided into three types: continuous fibers, long fibers, and short fibers in length. The addition of continuous fibers makes fibers the main load-bearin...
Claims
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IPC IPC(8): B29C64/314B29B15/10B29B15/14B33Y40/10B33Y70/10
CPCB29C64/314B29B15/10B29B15/14B33Y40/10B33Y70/10
Inventor 辛志博马玥段玉岗张富淦郝紫琦郭文辉
Owner XI AN JIAOTONG UNIV