The Study on Peeling Machine for Pineapple

• Main Authors: Yen Chun Hsien, 葉俊賢
• Other Authors: Sheng Chung Teh
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/99619533856384633882

碩士 === 國立中興大學 === 生物產業機電工程學系 === 92 === To meet the demand of peeling fresh pineapple, the objectives of this study were to develop a pineapple peeling machine and to analyze its peeling function. The prototype was designed to have adjustable rpm for a fruit-holding platform and a knife-rising screw, and adjustable function for the tension and tilted angle of the knife. Both turning speeds of the fruit-holding platform and the knife-rising screw affected testing results. As the knife tilted to 14 degree and peeling thickness was 1.1 cm, the turning speeds of the fruit-holding platform and the knife-rising screw were 55 rpm and 60 rpm, respectively, and resulted in the peeling rate of 32.75% and refining rate of 2.52%. The total peeling rate was defined from the better results and the parameter was set for the further peeling operation. For testing the effect of knife’s tension and tilted angle, results showed that peeling gradually to the right depth, the peeling thickness was 0.7 cm. As knife tension was 14.1 N, the average peeling thickness was the thickest, compared with 8.9 N and 3.7 N. However, when the knife tilted angles were set to 10, 14, and 18 degrees, the greater tension resulted in higher peeling rate and lower refining rate. In addition, when the knife tilted angle was fixed to 14 degree and the knife tensions were 3.7, 8.9, and 14.1 N, the average refining rates were 3.88, 0.90, and 0.65%, respectively. These values were the lowest ones compared to 10- and 18-degree fixed tilted angles. The results also showed that when the knife tension fixed to 8.9 N and the knife tilted angles changed to 10, 14, and 18 degrees, the total peeling rates were 28.95, 27.42, and 27.54 %, respectively, that was the lowest combination among others. The result also showed better performance than manual work, 30.16%. And, knife tension and tilted angles would affect the peeling thickness as well as their interactions.