Design of Mobile System for Pulper Machine Muh. Rinaldi (a*), Iqbal (b), Abdul Azis (b)
a) Hasanuddin University, Jl. Perintis Kemerdekaan 10, Makassar 90245, Indonesia
*unhas.ac.id
Abstract
Coffee is an important resource for the state income, because coffee has a high economic value. Wet coffee peeling (coffee pulping) is one of the stages in coffee processing. The wet coffee peeling is not same with dry coffee peeling. The coffee peeling using a pulper machine. There are many coffee pulper machines available and owned by several farmers, but there are still many shortcomings in these machines. The existing machine is not mobile because it has a large construction. Some farmers also still use manual coffee peels that are powered by human resources. Aims of this research is to create a 3-dimensional design for a mobile coffee pulper. The Method of this research starts from determining engine capacity, design analysis, determining dimensions, sketching each part of the machine, determining materials and forming a complete design that is ready to be simulated.. The Results of this research show that the pulper engine is mounted on a modified motorcycle frame and utilizes the rotating power from the end of the motorbike engine flywheel magnetic shaft. For one hopper filling, it is determined to be 18 kg, so that the hopper dimensions are 350x340x200 mm with a total volume of 0.0321 m3. The transmission system used a pulley and belt to transmit power from the engine to the pulper unit with the addition of a reduction shaft. The engine speed of 1200 rpm is reduced to 390 rpm, so the peeling silinder and metering device have rotational speeds of 110 rpm and 55 rpm respectively.
