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:
Aug. 19, 2025
Filed:
Dec. 06, 2022
Electric Power Research Institute., China Southern Power Grid, Guangzhou, CN;
Shuai Hou, Guangzhou, CN;
Mingli Fu, Guangzhou, CN;
Lei Jia, Guangzhou, CN;
Yunpeng Zhan, Guangzhou, CN;
Wenbo Zhu, Guangzhou, CN;
Baojun Hui, Guangzhou, CN;
Xiaolin Li, Guangzhou, CN;
Lingmeng Fan, Guangzhou, CN;
Yifan Zhang, Guangzhou, CN;
Bin Feng, Guangzhou, CN;
ELECTRIC POWER RESEARCH INSTITUTE., CHINA SOUTHERN POWER GRID, Guangzhou, CN;
Abstract
The present application provides a high-voltage cable insulation material continuous extrusion processing characteristic evaluation and optimization method and apparatus. The method comprises: continuously extruding a material under test as a melt, measuring and recording an inlet pressure P, a mass growth rate w, and the diameter D' of a melt sample strip, and obtaining apparent shear viscosity η(t) (step A1); obtaining an outlet expansion rate δ (step A2); recording and displaying curves η(t) and δ(t), and treating the time corresponding to an increase of a set percentage on the curves as a cross-linking starting time TX (step A3); selecting a reference sample for testing, and determining a cross-linking reaction starting time TS according to η(t) and δ(t) curves of the reference sample (step A4); and defining an index α according to Tx and Ts.