Saputra, Saldi Indra (2026) Analisa pengaruh variasi sudut mata pisau Terhadap efesiensi pemotongan pada mesin Pencacah plastik vertikal. Other thesis, Universitas Islam Riau.

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Abstract

Plastic waste has become an increasingly serious environmental issue due to the extensive use of plastic materials in daily life. One effective method to reduce plastic waste volume is through a shredding process using a plastic shredding machine. The performance of a plastic shredding machine is highly influenced by the design and cutting angle of the blades. This study aims to analyze the effect of blade angle variations on cutting efficiency in a vertical plastic shredding machine. The blade angle variations used in this study were 10°, 15°, and 20°. The test materials consisted of Polyethylene Terephthalate (PET) and Polypropylene (PP) plastics, each with a mass of 1 kg. The parameters analyzed included shredding time, amount of shredded material, production capacity, and cutting efficiency. The research method involved direct testing on the shredding machine with three repetitions for each blade angle variation. The results indicate that blade angle variations significantly affect cutting efficiency and shredding capacity. The 20° blade angle provided the most optimal performance, resulting in shorter shredding time and higher production capacity compared to the 10° and 15° blade angles. Therefore, selecting an appropriate blade angle can improve the efficiency of plastic shredding machines and support more effective plastic recycling processes.

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