The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2026
Filed:
May. 15, 2025
Nanjing University of Aeronautics and Astronautics, Nanjing, CN;
Congze Fan, Nanjing, CN;
Wenzhe Song, Nanjing, CN;
Zhongde Shan, Nanjing, CN;
Jinghua Zheng, Nanjing, CN;
Yiwei Chen, Nanjing, CN;
Yaxing Song, Nanjing, CN;
NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS, Nanjing, CN;
Abstract
An interlayer strengthening method for continuous fiber additive manufacturing based on pressure injected Z-pin-like structures is provided. A grid frame is printed with continuous fibers in horizontal slices of continuous fiber additive manufacturing, grid holes are regularly arranged and combined to form intermittent through spaces between layers, then thermosetting resin is injected into the spaces through pressure to build continuous longitudinally strengthened Z-pin-like structures across slice layers, and the resin is guided to penetrate and gradually fill universal interlayer pores in continuous fiber additive manufacturing by controlling resin filling extrusion pressure, thereby suppressing associated pore defects in additive manufacturing without introducing other auxiliary energy fields, ultimately achieving interlayer strengthening, and improving overall performance.