Production of Chips of Porang (Amorphophallus Oncophyllus) by Slicing Machine With Rotating Double Cutters

Chips of porang (amorphophallus oncophyllus) is slice of tubers of porang as a main material for glucomannan flour-making. Glucomannan flour containing high glucomannan is very useful to the food industry, non-food and health. Chips of porang production among the farmers in Magelang, Central Java, still use manual method that resulting low chips quality that does not meet for further processing, namely manufacturing of flour glucomannan. This applied research is intended to design the tubers chips maker with double rotating cutters to produce chips of uniform and the same thickness. The method used is engineering design approach starting from process of machine design, manufacture engine components, and engine performance testing. The result is a slicing machine with rotating cutters for producing chips of porang with the specifications: length dimension: 1000 (mm), width 750 (mm), height 1000 (mm), the weight of the machine: 85 (kg), the drive unit: motor gasoline of 5.5 HP. It was found that best performance of cutting process of the rotating double cutters is at 120 rpm, cutter angle of inclination is of 30, and production capacity is of 310 kg per hour. Keywords— chips of porang, rotating double cutters