Pholsuwan Anothai, Chailad Wichain, Simpraditpan Athapon, Martwong Ekkachai, Chattrakul Kawita
Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand.
Division of Science, Faculty of Science and Technology, Rajamangala University of Technology Suvarnabhumi, Phra Nakhon Si Ayutthaya 13000, Thailand.
Polymers (Basel). 2025 Jun 28;17(13):1804. doi: 10.3390/polym17131804.
This study presents the design and performance evaluation of a custom extrusion die for producing grass-cutting lines from high-density polyethylene (HDPE) with twist angles of 0°, 15°, 30°, and 45°. The mechanical properties, cutting efficiency, and energy consumption of the HDPE lines were compared with those of commercially available nylon lines with round and square profiles. The die successfully produced twisted HDPE lines with consistent geometry. Although the HDPE lines exhibited lower tensile strength than their nylon counterparts, due to inherent material differences and residual stress from twisting, they demonstrated comparable elastic modulus values. Importantly, HDPE lines require significantly less energy during processing, offering a cost-effective and environmentally friendly alternative. Cutting tests showed that the 45° twisted HDPE line achieved cutting performance comparable to the square-profile nylon line and surpassed the round-profile variant. These results highlight the potential of HDPE as a viable, energy-efficient material for grass-cutting applications, particularly when optimized through geometric design.
本研究介绍了一种定制挤出模头的设计与性能评估，该模头用于生产具有0°、15°、30°和45°扭转角的高密度聚乙烯（HDPE）割草线。将HDPE线的机械性能、切割效率和能耗与市售的圆形和方形截面尼龙线进行了比较。该模头成功生产出了几何形状一致的扭曲HDPE线。尽管HDPE线的拉伸强度低于尼龙线，这是由于材料固有差异和扭转产生的残余应力，但它们的弹性模量值相当。重要的是，HDPE线在加工过程中所需能量显著更少，提供了一种经济高效且环保的替代方案。切割测试表明，45°扭转的HDPE线的切割性能与方形截面尼龙线相当，且超过了圆形截面尼龙线。这些结果凸显了HDPE作为一种可行的、节能的割草应用材料的潜力，特别是在通过几何设计进行优化时。
