US 11,749,424 B2
Manufacturing method of a hoisting cable with small diameter, high strength, and high flexibility
Nan Zhang, Changchun (CN); Hui Liu, Changchun (CN); Youhong Sun, Changchun (CN); Pavel Talalay, Changchun (CN); Ting Wang, Changchun (CN); Xiaopeng Fan, Changchun (CN); Bing Li, Changchun (CN); Rusheng Wang, Changchun (CN); Da Gong, Changchun (CN); Yunchen Liu, Changchun (CN); Yang Yang, Changchun (CN); Jialin Hong, Changchun (CN); An Liu, Changchun (CN); and Yanji Chen, Changchun (CN)
Assigned to JILIN UNIVERSITY, Changchun (CN)
Filed by Jilin University, Changchun (CN)
Filed on Feb. 5, 2021, as Appl. No. 17/168,679.
Claims priority of application No. 202010107087.8 (CN), filed on Feb. 21, 2020.
Prior Publication US 2021/0265081 A1, Aug. 26, 2021
Int. Cl. H01B 7/18 (2006.01); H01B 7/04 (2006.01); H01B 13/34 (2006.01); H01B 13/14 (2006.01)
CPC H01B 7/1865 (2013.01) [H01B 7/04 (2013.01); H01B 13/14 (2013.01); H01B 13/34 (2013.01); Y10T 29/49117 (2015.01)] 1 Claim
OG exemplary drawing
 
1. A manufacturing method of a hoisting cable with small diameter, high strength, and high flexibility, comprising:
normally twisting 37 silver-plated copper wires in a layered form to obtain an inner conductive core, wherein, 1 silver-plated copper wire is arranged as a central wire in a first structural layer; 6 silver-plated copper wires are arranged in a second structural layer, and normal twisting is conducted in a left direction; 12 silver-plated copper wires are arranged in a third structural layer, and normal twisting is conducted in a right direction; and 18 silver-plated copper wires are arranged in a fourth structural layer, and normal twisting is conducted in the left direction;
preheating the obtained inner conductive core, extruding FEP with a high-temperature extruder, coating extruded FEP on a preheated inner conductive core, and cooling with hot water at 80° C. to 90° C. to obtain an insulating layer;
weaving silver-plated copper wires outside the obtained insulating layer in the following manner: 16 spindles×4 wires/spindle×diameter of 0.18 mm to obtain an outer conductive wire layer (3), wherein, the silver-plated copper wires are woven at a weaving pitch of 21 mm to 25 mm;
weaving a Vectran aramid fiber mesh outside the obtained outer conductive wire layer to obtain a tensile layer (4), wherein, aramid fibers are woven at a constant tension, a weaving pitch of 80 mm to 90 mm, and a weaving angle of 10° in the following manner: 24 spindles×2 strands/spindle; and
wrapping the obtained tensile layer with a polyimide film coated with tetrafluoroethylene-hexafluoropropylene copolymer, and after the wrapping is completed, fusing the polyimide film at 400° C. and cooling to obtain an outer protective layer.