| dc.description.abstract | Pulverization is a process that is very influential on the quality of the
coffee powder. The smaller the particles of coffee powder, the task of coffe will
be more delicious, because the most of the ingredients found in coffee can be
dissolved. Milling is a process powdering the roasted beans. The smaller the
particle size of coffee that has been milled it will greatly affect the aroma and taste
of coffee. The purpose of this study was to determine the effect of the spin
machine and coffee grinder coffee roaster temperature on time, the capacity of
milling, which is produced by the engine torque, engine efficiency milling coffee,
results of pulverization, average particle diameter, and the classification level of
refinement.
This research was done in two stages, preliminary and primary research.
Preliminary research involves determining the optimum engine rotation speed and
determination through the roaster temperature preference test that was used as A
and B factor, then conducted the main research includes the process of
pulverization and sifting the results of robusta coffee mill.
Rotation speed of the engine used in this study were 3,365; 2,696 and
2,219 RPM. Roaster time favorite of test results at 160ºC temperature with time at
30 and 35 minutes. The greater capacity and efficiency of the hammer mill
machine, the engine rotation speed and temperature of the coffee roaster was
increasingly high. But the torque was inversely proportional to the result of
pulverization spin speed and temperature roaster coffee. The would be greater the
yield and the speed of rotation and torque roaster temperature lower. To get the
fine grinding was required major engine rotation speed and high roaster
temperature. | en_US |
