Design and Test of Automatic Tying and Knotting Machine

WU Kunjun; NI Shan; GUO Yingqi; ZHANG Dongfeng

doi:10.19554/j.cnki.1001-3563.2025.21.019

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (21) : 181-189. DOI: 10.19554/j.cnki.1001-3563.2025.21.019

Automatic and Intelligent Technology

Design and Test of Automatic Tying and Knotting Machine

WU Kunjun, NI Shan, GUO Yingqi, ZHANG Dongfeng^*

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Abstract

The work aims to design an automatic tying and knotting device with a compact structure and efficient operation to realize the automated tying and knotting operation of double-layer woven bags in enterprises. First of all, the double-layer woven bag tying and knotting process was analyzed to determine the use of a double clove single knot as the working knot, and simulate the process of manually tying double clove single knots, and design the automatic tying and knotting machine's mechanical mechanism, so that it could complete the action of clamping, bunching, winding, hooking, tightening and breaking the rope, etc. A kinematics analysis of the key structure was carried out to build the corresponding control system, to achieve automatic equipment operation. Through the prototype production and performance testing, the test results showed that the success rate of the device knotting could reach 99%, with a knotting efficiency of 172.29 knots/h, demonstrating good stability and operational efficiency. The automatic tying and knotting machine can effectively replace labor in the double-layer woven bag to tie a reliable double clove single knot, to meet the actual production needs of enterprises on the quality and efficiency of the double-layer woven bag knot tying and knotting, can significantly reduce the labor cost, improve the operational efficiency, and has a broad market application prospect.

Key words

tying and knotting machine / automatic knotting / double clove single knot / control system / ADAMS / trajectory analysis

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WU Kunjun, NI Shan, GUO Yingqi, ZHANG Dongfeng. Design and Test of Automatic Tying and Knotting Machine[J]. Packaging Engineering. 2025, 46(21): 181-189 https://doi.org/10.19554/j.cnki.1001-3563.2025.21.019

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