公开(公告)号：US20240286315A1

公开(公告)日：2024-08-29

申请号：US18572780

申请日：2022-07-23

Applicant: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS

Inventor： Zhongde SHAN ,  Congze FAN ,  Yiwei CHEN ,  Jinghua ZHENG ,  Wenzhe SONG ,  Jingxuan WANG

IPC: B29B11/10 ,  B29B11/16 ,  B29B15/14 ,  B29C64/314 ,  B33Y40/10

CPC classification number: B29B11/10 ,  B29B11/16 ,  B29B15/14 ,  B29C64/314 ,  B33Y40/10

Abstract: A composite filament melt impregnation device with an automatic lifting channel for additive manufacturing includes a mechanical lifting device, a heating device, a curved resin impregnation channel, a filament guide block, a single screw extruder, a replaceable combination die nozzle, and a resin riser. The composite filament melt impregnation device can significantly improve the efficiency of replacing filaments and treating broken filaments in a forming process of continuous fiber filaments, reduce the operation difficulty of a production process, and ensure the safety of operators. The design of the resin riser can achieve slight dynamic adjustment of pressure in a melt cavity in the production process, improve the stability of product quality, and ultimately achieve continuous production and rapid replacement of high-performance continuous fiber composites.

公开(公告)号：US20240367361A1

公开(公告)日：2024-11-07

申请号：US18777503

申请日：2024-07-18

Applicant: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS

Inventor： Wenzhe SONG ,  Congze FAN ,  Jinghua ZHENG ,  Yiwei CHEN ,  Jingxuan WANG ,  Zhongde SHAN

IPC: B29C48/05 ,  B29C48/28 ,  B29C48/88 ,  B29C48/885 ,  B29K71/00 ,  B29K105/08 ,  B29K307/04 ,  B33Y70/10

Abstract: An on-orbit composite filament forming device for space 3D printing includes a constant tension unwinding module, a replaceable resin filament rotary wrapping module, a melt preheating chamber, a curved channel impregnation chamber, a variable aperture resin recovery device, a heat protective housing, a convective cooling device, a traction device, and a winding device. The replaceable resin filament rotary wrapping module wraps a resin filament on a surface of a carbon fiber by circumferential rotation and is provided with an active unwinding reel placed on a circular rail centered on the carbon fiber; the melt preheating chamber is used for melting resin to wrap the surface of the fiber, and is equipped with a lifting device for automatic opening and closing; the curved channel impregnation chamber is formed with a wedge-shaped high-pressure impregnation zone by mutual extrusion of upper and lower pressure blocks, thereby improving the quality of fiber impregnation.