Application of The Reverse Engineering In The Modelling of A Blade and Screen In A Hammer Mill

Abstract

PT XYZ plans to produce coconut shell briquettes. Currently, PT XYZ already has a hammer mill
machine that will be used in the production process. A hammer mill machine is a machine that serves
to smooth the material. Before carrying out mass production, a simulation is carried out first. The
manufacture of briquettes found obstacles in the process of grinding and screening. Coconut shell
charcoal that has been milled and entered is partially retained and cannot be released to proceed to the
next process. The grinding result is larger than the screen size, which is 1 to 2 mm. In the manufacture
of briquettes, it is expected that the grinding results are less or equal to 0.4 mm. Based on the
identification of the problem, the alternative solution chosen by the researcher is to redesign the
hammer mill machine, especially on the blade and screen sections. The design is done using the
reverse engineering method. There are five steps in designing using this method. In the study, it was
found that the second design was a suitable design to be developed because it was better than the
existing state. The mill results were obtained with an average of 0.0343 mm and a grinding time of
186.807 seconds. The fineness values and the grinding process time were obtained through
simulations using the EDEM 2022.1 software.