Design Of a Dry Coffee Bean Shell Separation Machine Model To Increase Productivity

Department of Mechanical Engineering, Bali State Polytechnic, Denpasar, Indonesia

^* Corresponding author: julisuarbawa@pnb.ac.id

Abstract

The research objective of designing a coffee bean skin separator model is to increase work productivity in the ergonomic dry coffee bean skin separation process. The way this dry coffee peel separator machine works is that the steel plates will rotate each other at certain gaps so that they can rub the coffee until it peels off. The design of this dry coffee bean peeling machine is adjusted to the results of anthropometric data measurements. In the previous coffee skin splitting process using an old-fashioned coffee peeler machine where the coffee beans were put in the inlet without sorting the coffee sizes, all coffee sizes were put in to be processed in the machine. Then the peeling plate gap is adjusted and the medium size is selected. As a result of stripping, it was obtained that almost 50% of the coffee beans had not been peeled off, and had to be put back in again. Besides that, the results of the stripping were still mixed with the dirt skin, so it needed to be processed again to clean the coffee. The results of testing the performance of the old model of the peeler with the new model of the improved peeler obtained an increase in performance or an increase in productivity. Increased work capacity of the dry coffee peeler (Kp) = (153.84 -17.24) / 17.24 = 176.88%, while the increase in the quality of well-exfoliated coffee beans (Kw) is = (90.74 – 85 .41)/85.41 = 6.24% thereby increasing productivity.